Copyright 2009 Year IEEE. Reprinted from IEEE TRANSACTIONS ON ADVANCED PACKAGING. Such permission of the IEEE does not in any way imply IEEE
|
|
- Rudolf McCormick
- 5 years ago
- Views:
Transcription
1 Copyright 2009 Year IEEE. Reprinted from IEEE TRANSACTIONS ON ADVANCED PACKAGING. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Institute of Microelectronics products or services. Internal of personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to
2 IEEE TRANSACTIONS ON ADVANCED PACKAGING, VOL. 32, NO. 2, MAY Design, Fabrication, and Assembly of an Optical Biosensor Probe Package for OCT (Optical Coherence Tomography) Application C. S. Premachandran, Senior Member, IEEE, Ahmad Khairyanto, Kelvin Chen Wei Sheng, Janak Singh, Jason Teo, Xu Yingshun, Chen Nanguang, Colin Sheppard, and Malini Olivo Abstract A miniaturized optical bioprobe package is developed using a 3-D micromirror and is tested for bio-imaging application. A silicon optical bench is designed and micromachined to assemble the fiber, lens, and the 3-D micromirror device. A 45 angle trench is used to place the micromirror to achieve larger scanning range. Trace lines are formed on the optical bench and are connected to silicon micromirror using solder. A GRIN lens with lower numerical aperture has been used to focus the optical beam onto the micromirror. The bioprobe is packaged and is tested in a time domain optical coherence tomography (OCT) setup and optical image is obtained for plant tissue. Index Terms Biosensor, micro-electro-mechanical system (MEMS), MEMS packaging, micromirror, optical coherence tomography (OCT), optical probe, silicon optical bench (SiOB), 3-D MEMS. I. INTRODUCTION OPTICAL coherence tomography (OCT) bio-imaging is a new emerging technique for higher resolution biopsies and other medical diagnostic applications as well [1]. OCT imaging can achieve real time cellular scale resolution, which is important to produce high resolution cross-sectional images of the internal microstructure of living tissues [2], [3]. Higher resolution combined with real time mode makes the optical probe OCT imaging an important tool for accurate cancer diagnostics and monitoring to avoid recurring of cancer lesions. OCT with miniaturized probes can be used where excision biopsy is unsafe or not possible. It can also be used in delicate interventional procedures, such as for neural investigations in brain and to reduce sampling errors due to the fact that it is real time. Optical probe is one of the critical elements in OCT imaging, as this makes the OCT imaging real time. The miniaturized optical probe helps Manuscript received May 14, 2007; revised March 15, First published May 08, 2009; current version published May 28, This work was recommended for publication by Associate Editor K. Kurabayashi upon evaluation of the reviewers comments. C. S. Premachandran, A. Khairyanto, K. C. W. Sheng, J. Singh, and J. Teo are with the A*STAR Institute of Microelectronics, Singapore Science Park II, Singapore. X. Yingshun, C. Nanguang, and C. Sheppard are with the Department of Bioengineering, National University of Singapore, Singapore. M. Olivo is with the Division of Medical Sciences, National Cancer Centre, Singapore and also with the Bio-Optical Imaging Group, SBIC (Singapore Bioimaging Consortium), A*STAR (Agency for Science, Technology and Research), Singapore.. Color versions of one or more of the figures in this paper are available online at Digital Object Identifier /TADVP Fig. 1. OCT setup. in reducing patient s trauma by eliminating tissue removal required for biopsy. In its simplest implementation, the bioprobe is miniaturized assemblies of fiber optics, which can deliver (and also collect scattered) light beam and scan in one dimension (lateral) on the target. This scanning can be achieved by actuating the fiber itself. Research has also been reported where scanner micro-electro-mechanical system (MEMS) micromirror is integrated at the outer tip of the probe to add scan flexibility [4] [6]. Micromirror technology adds the dynamism in the selection of cross section (of tissue, lesions, etc.) by real time observations. Main challenge is in increasing dynamic flexibility while keeping the diameter small, which is essential to reduce patient trauma during real time optical biopsy. This paper outlines the details of packaging and integration development of a miniaturized optical bio-probe. A miniaturized package is required to make the probe to use in the OCT setup to have insitu real time imaging of the cells/tissues. II. OPTICAL COHERENCE TOMOGRAPHY TEST METHOD A schematic view of the endoscope OCT imaging system is shown in Fig. 1. A low coherent light source is used to shine the light into the sample. The source is coupled to the OCT system by a splitter so that the input light is split into two, one is coupled to reference optics and another is to a scanning optics. The light /$ IEEE
3 418 IEEE TRANSACTIONS ON ADVANCED PACKAGING, VOL. 32, NO. 2, MAY 2009 Fig. 3. Schematic view of the package with silicon optical bench (SiOB) approach. Fig. 2. (a) Three-dimensional MEMS micromirror with thermal actuators. (b) Actuator in close view. from the scanning optics fall onto the sample of interest and is scattered back to the scanning optics and couple back to the detector. The light from the reference optics also traverse back to the detector. Reflected light from the reference optics and the scattered light from the sample will create an interference signal. The interference signal provides information about the sample. The interference signal is detected and demodulated based on the backscattered light from the tissue. The depth of probing on sample can be changed by moving the reference mirror back and forth. By moving probe optics on the sample different areas of the sample can be scanned. III. PACKAGE DESIGN Advantage in OCT is using a short coherence length of broad band light source in order to achieve cross sectional images with micrometer resolution. With the advantage of silicon micromachining and using miniaturized micromechanical devices the OCT systems can be achieved with high speed and high resolution images. Since optical components made using MEMS has smaller physical size, it enhances in speed and lower operating power. In the OCT setup a miniaturized probe is required to obtain a real time imaging. A real time imaging can provide instant tissue information during the surgery. Limitation on current technique is on the scanning range of the beam. Using a 3-D micromirror the beam can be steered based on the mirror rotational angle [Fig. 2(a)]. Earlier results have shown that 3-D scanning can be achieved with a 2-D mirror with an external motor driven to further rotate the mirror. In this design no external motor is required and the mirror it self can rotate and scan the beam in larger angle to capture the scattered light from the tissue. Using silicon MEMS process a miniaturized 3-D mirror is fabricated. The mirror size is about 500 m in a 1.5 mm square chip. The mirror is suspended in four springs and is connected to actuators [Fig. 2(b)]. Thermal actuation is used to move the mirror. Since the actuators are very thin, 2 m thick and the heating of the actuator require only a very small voltage, the outside temperature variation will not affect the overall temperature of the actuator. Also a feed back control circuit controls the mirror rotation and if the angle of rotation does not meet additional voltage will be supplied to meet the required angle of rotation. The maximum angle the mirror can rotate is about 16 ; the scanning rate is 21 fps. A schematic view of the probe is shown below (Fig. 3). The assembly of the probe starts with attaching the mirror, Grin lens, optical fiber on to silicon optical bench (SiOB) fabricated by KoH process. The micromirror is attached on to the lower substrate and the metal traces are formed on the substrate. Grin lens and fiber are attached onto the top substrate. The two substrates are bonded together in an optical bench after aligning the grin lens to the micromirror. IV. OPTICAL DESIGN The micro-optical components are required to collect the light and focus the beam on to the mirror. Design of the package depends on the on the selection of micro-optical components. The dimension and shape of the optical components will determine the final package size. The optical component s physical properties are determined based on the optical resolution and image quality requirement. The axial resolution of the OCT system depends on the light source. The advantage in using the optical probe is to increase the lateral resolution of the system. The lateral resolution of the
4 PREMACHANDRAN et al.: DESIGN, FABRICATION, AND ASSEMBLY OF AN OPTICAL BIOSENSOR PROBE PACKAGE FOR OCT 419 TABLE I POWER DISTRIBUTION ALONG THE OPTICAL PATH INSIDE THE PROBE Fig. 4. Optical simulation to study the beam size and coupling efficient. Fig. 6. Light path of the beam based on the optical model of the probe. Fig. 5. Design of grin lens dimensions to meet the beam diameter requirements. (Grintech GmbH). system depend on optical parameters such as the size of the lens, geometry, and scan angle of the MEMS mirror, beam diameter and the focal length of the lens. In the current design the transverse resolution refers to the smallest resolvable dimension on the sample that the optical device is capable of, in the direction perpendicular to the optical axis. In the case of this probe, the transverse resolution, w, can be defined as the spot diameter at the beam waist (focal point). Transverse resolution can be obtained from the following formula: An optical simulation is performed to study the beam diameter and the coupling efficiency after scattering from the sample (Fig. 4). In the initial setup, a reflective surface is used to study the coupling efficiency and subsequently modified the reflective surface to more rough for scattering. Optical design is done to make sure that the light will be focused at the sample (tissue) side. A grin lens is selected to get the maximum working distance and at the same time to achieve a smaller beam diameter (BD) at the mirror side (Fig. 5). Beam diameter at the mirror side should be at least 50% smaller than the mirror diameter so that most of the light falls into the mirror even there is a small shift in beam due to optical components misalignment. Efficiency of the light collection at the MEMS mirror after scattering from the sample is calculated in the simulation. It is found that about 70% of the light could be collected at the mirror provided the sample is a reflective surface (Table I). The collection efficiency will be degraded if the sample is rough and scattering nature (Fig. 6). V. FABRICATION OF SIOB The driving factor in developing a probe is to miniaturize the over all dimension. This is a challenge for the packaging of the probe. The optical components and the mirror need to be packaged in a miniaturized format and at the same time the packaging material must be transparent to infrared (IR) light. In the current design wavelength of 1300 nm is used in shining the light on to the sample. Selection of substrate for packaging should meet both optical and miniaturization requirements. Silicon is a good material for micromachining to create smaller dimension to meet miniaturization and is transparent to IR wavelength. The targeted diameter of the probe is 2 mm. An 8-in wafer is used to fabricate the SiOB structures. Since KOH etching can not make 45 angle trenches, the structures are made on wafer with 45 shift. The structure is rotated at 45 angle and the trenches are made. While singulating the devices the wafer has to be mounted carefully to offset the 45 angle trench. The Si wafer is micromachined to form a slot to attach the 3-D micromirror. Depth of the trench is calculated to make sure that the mirror pads are aligned to metal traces to form interconnection (Fig. 7).
5 420 IEEE TRANSACTIONS ON ADVANCED PACKAGING, VOL. 32, NO. 2, MAY 2009 Fig. 7. Silicon optical bench for 3-D micromirror attachment. Fig. 9. Three-dimensional micromirror is interconnected to SiOB with solder balls. Fig. 8. GRIN lens and fiber attached to the SioB substrate. The UBM Cr Au are deposited on the silicon wafer by sputtering method. The sputtered metal is patterned by lithographic technique. The pitch of the metal traces is about 150 m with width of 125 m. The tight dimensions are required to meet the probe size of 2 mm diameter. The metal traces are formed on the trenches and is extended to the end of the silicon optical bench to connect to the external world. GRIN lens and the fiber are attached to a silicon optical bench. Placement of GRIN lens is such a way that the optical axis is in line with the centre of the MEMS 3-D micromirror. A. Probe Assembly Assembly of the probe starts with attachment of grin lens and fiber into the silicon optical bench (Fig. 8). In this development an integrated grin lens with fiber is used and hence there is no need to do align the fiber and lens separately. A UV cure epoxy is used to attach the GRIN lens and the fiber to the bench. The 3-D micromirror is attached to another SiOB which has got a 45 trench to place the mirror. Solder balls are attached to the mirror device and is subjected to reflow (Fig. 9). A pick and place machine picks the mirror device and attached to the silicon substrate. The solder balls on the mirror device get contact with the metal traces on the bench. The solder interconnected mirror device with the silicon substrate is reflowed again to form the final interconnection to the external world. Fig. 10. GRIN lens and fiber attached to silicon substrate bonded with mirror SiOB. The integrated GRIN lens and fiber attached silicon substrate is sandwich bonded with the mirror attached silicon substrate (Fig. 10). The final assembly is encapsulated into a plastic injection molded tube suitable to meet endoscope requirements. VI. TESTING OF THE OPTICAL PROBE IN OCT SETUP Test setup of the probe in the OCT system is shown in Fig. 11(a). A time domain OCT system is used to scan the sample. Reflected light from the reference mirror and the sample are made to interfere and the interference signal is detected at the detector. A sample is kept at a distance of 2.5 mm away from the mirror which is to be scanned. The reflected signal from the probe mirror is scanned and is detected. The detected signal is showed in Fig. 11(b). A plant tissue has been used as a bio-sample for imaging. The working distance from the probe mirror is about 2.5 mm. A-line signal is obtained from the time domain OCT and it detects the envelope of interference signals generated from sample through the micromirror in the optical probe and the reference signal reflected by the reference mirror (reference beam) which one we used here is a rotary mirror array (RMA) (Fig. 11). The axial scanning rang of illumination is almost 4 mm in tissue sample. The useful signal range is about 2.5 mm. This line scan results are initial results and is to prove the
6 PREMACHANDRAN et al.: DESIGN, FABRICATION, AND ASSEMBLY OF AN OPTICAL BIOSENSOR PROBE PACKAGE FOR OCT 421 Fig. 12. Line signal from OCT system. Fig. 13. Complete probe in a biocompatible housing material. Fig. 11. (a) OCT setup for probe testing. (b) Interference signal from the sample at a distance of 2.5 mm from the MEMS mirror. assembly of micromirror with Grin lens, micromirror in a silicon optical bench (SiOB) concept that the light can be collected from the scattered sample (Fig. 12). Signal-to-noise ratio is measured and found to be more than 70 db and which can be evaluated from A-line signal. A completed probe enclosed in biocompatible housing is shown in Fig. 13. The spatial (axial) resolution of the image is depend on the band width of the light source at full-width half-maximum (FWHM) (power level). The band width of the light source used is about 110 nm and the achieved resolution is about 6.8 m. VII. CONCLUSION A miniaturized optical bio-probe has been developed using a 3-D MEMS micromirror. A miniaturized package is developed for the bio-probe using Silicon optical bench. Micro-optical components such as GRIN lens and fiber is used for optical coupling and geometrical simulation study showed that beam diameter is with in the MEMS mirror. A silicon optical bench with a 45 slant trench is developed for attaching the mirror. Interconnection of MEMS mirror to the outside world is made through the solder bumps interconnection and good continuity has been achieved. Bio-probe package developed has been tested in the OCT setup and demonstrated the interference signal for sample signal at a distance of 2.5 mm form the probe mirror. Subsequently an onion tissue has been used for optical scanning and good depth of image has been produced. Imaging of cancer tissue with the developed probe is being studied and will be reported later. ACKNOWLEDGMENT The authors would also like to thank K. Ramakrishna, P. V. Ramana, and C. T. Kuan (NTU) for their support in this project.
7 422 IEEE TRANSACTIONS ON ADVANCED PACKAGING, VOL. 32, NO. 2, MAY 2009 REFERENCES [1] J. G. Fujimoto, Optical coherence tomography C. R. Acad. Sic. Paris t.2, Applied Physics (Biophysics), 2001, pp [2] D. Huang, E. A. Swanson, C. P. Lin, J. S. Schuman, W. G. Stinson, W. Chang, M. R. Hee, T. Flotte, K. Gregory, C. A. Puliafito, and G. Fujimoto, Optical coherence tomography, Science, vol. 254, pp , [3] B. E. Bouma, S. H. Yun, W. Y. Oh, M. Shishkov, J. F. de Boer, and G. T. Tearney, Latest developments in optical coherence tomography, in Proc. 17th Annu. Meeting IEEELasers Electro-Optics Soc., 2004, pp [4] D. T. McCormick, W. Jung, Z. Chen, and N. C. Tien, 3-D MEMS based minimally invasive optical coherence tomography, in Transducers 05, Jun. 5 9, 2005, pp [5] T. Xie, H. Xie, G. K. Fedder, and Y. Pan, Endoscopic optical coherence tomography with new MEMS mirror, Electron. Lett., vol. 39, no. 21, pp , Oct. 16th, [6] W. Jung, D. T. McCormick, J. Zhang, L. Wang, N. C. Tien, and Z. P. Chen, Three- dimensional endoscopic optical coherence tomography by use of a two axis microelectromechanical scanning mirror, Appl. Phys. Lett., vol. 88, p , [7] P. H. Tan, D. S. Mukai, M. Brenner, and Z. Chen, In vivo endoscopic optical coherence tomography by use of a rotational micro electro mechanical system probe, Opt. Lett., vol. 29, no. 11, Jun. 1, [8] J. A. Ayers, W. C. Tang, and Z. Chen, 60 degree rotating micromirror for transmitting and sensing optical coherence tomography signals, in Proc. Sensors, Oct. 2004, vol. 1, pp Janak Singh received the Ph.D. degree in MEMS from Indian Institute of Technology, Delhi, India, in 1998, and the MBA degree from the Business School, National University of Singapore, in 2008 He joined the MEMS group at Institute of Microelectronics Singapore in 1999 and since then has been working in this area. He worked in BioMEMS fluidic devices, micro-relay, MOEMS, and inertial sensors. His recent interests include MEMS applications for biomedical applications, nano technology, and silicon photonics. He currently holds the position of Industry Development Manager for MEMS, Nanoelectronics, and Photonics at the Institute of Microelectronics, Singapore. Jason Teo, photograph and biography not available at the time of publication. Xu Yingshun received the B.Eng. degree in biomedical engineering from Tianjin University, Tianjin, China, in He is currently working toward the Ph.D. degree from the National University of Singapore and Institute of Microelectronics, A*STAR, Singapore. His research interests involve development of optical MEMS and endoscopic imaging. C. S. Premachandran (SM 02) received the M.Tech. degree in solid state technology from Indian Institute of Technology, Madras, India. His research focuses are on the MEMS, bio, and advanced packaging technologies. He is currently a Member of Technical Staff in Institute of Microelectronics, Singapore. Chen Nanguang received the B.S. in electrical engineering from Hunan University, in 1988, the M.S. degree in physics from Peking University, in 1994, and the Ph.D. degree in biomedical engineering from Tsinghua University, in He joined the Optical and Ultrasound Imaging Laboratory at the University of Connecticut in 2000 as a postdoctoral fellow and then became an Assistant Research Professor in Since 2004, he has been an Assistant Professor of Bioengineering and Electrical Engineering with the National University of Singapore. His research interests include diffuse optical tomography, optical coherence tomography, and novel microscopic imaging methods. Ahmad Khairyanto received the B.Eng. (mechanical and production engineering) degree and the M.Eng. (mechanical and aerospace engineering) degree from the from Nanyang Technological University, Singapore, in 2003 and 2008, respectively. He is currently a Research Officer with the A-Star Institute of Microelectronics. His current research interests are in the areas of MEMS packaging, optics, and generalized optimization theory. Kelvin Chen Wei Sheng received the Diploma in electronics and communications, specializing in photonics technology from Nanyang Polytechnic, in He is currently with Singapore A*STAR Institute of Microelectronics. He has published technical papers on MEMS in international conferences. Colin Sheppard received the Ph.D. degree from the University of Cambridge and the D.Sc. degree from the University of Oxford. Currently, he is Professor and Head of the Division of Bioengineering at the National University of Singapore. His main area of research is in confocal and multiphoton microscopy, including instrument development and investigation of novel techniques. Malini Olivo received the Ph.D. degree in bio-medical physics. She is currently Head of Bio-optical Imaging at the Singapore Bioimaging Consortium and she also holds an Adjunct Associate Professor appointment in the Department of Pharmacy at the National University of Singapore. She is also Principal Investigator of the Photodynamic Treatment and Diagnosis and Biophotonics Laboratories in the Singapore National Cancer Centre and SingHealth Research Facilities. She has pioneered the area of clinical application of photodynamic diagnosis and treatment in cancer in Singapore and has spearheaded several collaborative projects in biophotonics and nanophotonics for in vivo optical bio-imaging applications in biomedical research in Singapore. Her research interests include bio-nanophotonics and photomedicine.
A THREE DIMENSIONAL REAL-TIME MEMS BASED OPTICAL BIOPSY SYSTEM FOR IN-VIVO CLINICAL IMAGING
A THREE DIMENSIONAL REAL-TIME MEMS BASED OPTICAL BIOPSY SYSTEM FOR IN-VIVO CLINICAL IMAGING Daniel T. McCormick 1, Woonggyu Jung 2,3, Yeh-Chan Ahn 2, Zhongping Chen 2,3 and Norman C. Tien 4 1 Advanced
More informationOptical coherence tomography
Optical coherence tomography Peter E. Andersen Optics and Plasma Research Department Risø National Laboratory E-mail peter.andersen@risoe.dk Outline Part I: Introduction to optical coherence tomography
More informationMiniaturized probe using 2 axis MEMS scanner for endoscopic multiphoton excitation microscopy
Miniaturized probe using 2 axis MEMS scanner for endoscopic multiphoton excitation microscopy Woonggyu Jung *,1,2, Shuo Tnag 3, Tiquiang Xie 1, Daniel T. McCormick 4, Yeh-Chan Ahn 1, Jianping Su 1,2, Ivan
More informationA miniature all-optical photoacoustic imaging probe
A miniature all-optical photoacoustic imaging probe Edward Z. Zhang * and Paul C. Beard Department of Medical Physics and Bioengineering, University College London, Gower Street, London WC1E 6BT, UK http://www.medphys.ucl.ac.uk/research/mle/index.htm
More informationIn vivo three-dimensional microelectromechanical endoscopic swept source optical coherence tomography
In vivo three-dimensional microelectromechanical endoscopic swept source optical coherence tomography Jianping Su, 1 Jun Zhang, 2 Linfeng Yu, 2 Zhongping Chen 1,2 1 Department of Biomedical Engineering,
More informationConfocal Imaging Through Scattering Media with a Volume Holographic Filter
Confocal Imaging Through Scattering Media with a Volume Holographic Filter Michal Balberg +, George Barbastathis*, Sergio Fantini % and David J. Brady University of Illinois at Urbana-Champaign, Urbana,
More informationWinter College on Optics: Fundamentals of Photonics - Theory, Devices and Applications February 2014
2572-10 Winter College on Optics: Fundamentals of Photonics - Theory, Devices and Applications 10-21 February 2014 Photonic packaging and integration technologies II Sonia M. García Blanco University of
More informationNumerical simulation of a gradient-index fibre probe and its properties of light propagation
Numerical simulation of a gradient-index fibre probe and its properties of light propagation Wang Chi( ) a), Mao You-Xin( ) b), Tang Zhi( ) a), Fang Chen( ) a), Yu Ying-Jie( ) a), and Qi Bo( ) c) a) Department
More informationOptical Characterization and Defect Inspection for 3D Stacked IC Technology
Minapad 2014, May 21 22th, Grenoble; France Optical Characterization and Defect Inspection for 3D Stacked IC Technology J.Ph.Piel, G.Fresquet, S.Perrot, Y.Randle, D.Lebellego, S.Petitgrand, G.Ribette FOGALE
More informationPiezoelectric transducer based miniature catheter for ultrahigh speed endoscopic optical coherence tomography
Piezoelectric transducer based miniature catheter for ultrahigh speed endoscopic optical coherence tomography The MIT Faculty has made this article openly available. Please share how this access benefits
More informationFigure 7 Dynamic range expansion of Shack- Hartmann sensor using a spatial-light modulator
Figure 4 Advantage of having smaller focal spot on CCD with super-fine pixels: Larger focal point compromises the sensitivity, spatial resolution, and accuracy. Figure 1 Typical microlens array for Shack-Hartmann
More informationNumerical analysis of gradient index lens based optical coherence tomography imaging probes
Journal of Biomedical Optics 15(6), 066027 (November/December 2010) Numerical analysis of gradient index lens based optical coherence tomography imaging probes Woonggyu Jung University of Illinois at Urbana-Champaign
More informationOptical MEMS pressure sensor based on a mesa-diaphragm structure
Optical MEMS pressure sensor based on a mesa-diaphragm structure Yixian Ge, Ming WanJ *, and Haitao Yan Jiangsu Key Lab on Opto-Electronic Technology, School of Physical Science and Technology, Nanjing
More informationRF MEMS Simulation High Isolation CPW Shunt Switches
RF MEMS Simulation High Isolation CPW Shunt Switches Authored by: Desmond Tan James Chow Ansoft Corporation Ansoft 2003 / Global Seminars: Delivering Performance Presentation #4 What s MEMS Micro-Electro-Mechanical
More informationOptical design of a dynamic focus catheter for high-resolution endoscopic optical coherence tomography
Optical design of a dynamic focus catheter for high-resolution endoscopic optical coherence tomography Panomsak Meemon,* Kye-Sung Lee, Supraja Murali, and Jannick Rolland CREOL, College of Optics and Photonics,
More informationSingle-/multi-mode tunable lasers using MEMS mirror and grating
Sensors and Actuators A 108 (2003) 49 54 Single-/multi-mode tunable lasers using MEMS mirror and grating A.Q. Liu a,, X.M. Zhang a,j.li a,c.lu b a School of Electrical & Electronic Engineering, Nanyang
More information3-5μm F-P Tunable Filter Array based on MEMS technology
Journal of Physics: Conference Series 3-5μm F-P Tunable Filter Array based on MEMS technology To cite this article: Wei Xu et al 2011 J. Phys.: Conf. Ser. 276 012052 View the article online for updates
More informationIntegrated photonic circuit in silicon on insulator for Fourier domain optical coherence tomography
Integrated photonic circuit in silicon on insulator for Fourier domain optical coherence tomography Günay Yurtsever *,a, Pieter Dumon a, Wim Bogaerts a, Roel Baets a a Ghent University IMEC, Photonics
More informationMicromachined Integrated Optics for Free-Space Interconnections
Micromachined Integrated Optics for Free-Space Interconnections L. Y. Lin, S. S. Lee, M C. Wu, and K S. J. Pister Electrical Engineering Dept., University of California, Los Angeles, CA 90024, U. S. A.
More informationFigure 1: Layout of the AVC scanning micromirror including layer structure and comb-offset view
Bauer, Ralf R. and Brown, Gordon G. and Lì, Lì L. and Uttamchandani, Deepak G. (2013) A novel continuously variable angular vertical combdrive with application in scanning micromirror. In: 2013 IEEE 26th
More informationParallel Mode Confocal System for Wafer Bump Inspection
Parallel Mode Confocal System for Wafer Bump Inspection ECEN5616 Class Project 1 Gao Wenliang wen-liang_gao@agilent.com 1. Introduction In this paper, A parallel-mode High-speed Line-scanning confocal
More informationMoving from biomedical to industrial applications: OCT Enables Hi-Res ND Depth Analysis
Moving from biomedical to industrial applications: OCT Enables Hi-Res ND Depth Analysis Patrick Merken a,c, Hervé Copin a, Gunay Yurtsever b, Bob Grietens a a Xenics NV, Leuven, Belgium b UGENT, Ghent,
More informationDevelopment of a new multi-wavelength confocal surface profilometer for in-situ automatic optical inspection (AOI)
Development of a new multi-wavelength confocal surface profilometer for in-situ automatic optical inspection (AOI) Liang-Chia Chen 1#, Chao-Nan Chen 1 and Yi-Wei Chang 1 1. Institute of Automation Technology,
More informationAdaptive optics two-photon fluorescence microscopy
Adaptive optics two-photon fluorescence microscopy Yaopeng Zhou 1, Thomas Bifano 1 and Charles Lin 2 1. Manufacturing Engineering Department, Boston University 15 Saint Mary's Street, Brookline MA, 02446
More informationSupplementary Figure S1. Schematic representation of different functionalities that could be
Supplementary Figure S1. Schematic representation of different functionalities that could be obtained using the fiber-bundle approach This schematic representation shows some example of the possible functions
More information64 Channel Flip-Chip Mounted Selectively Oxidized GaAs VCSEL Array
64 Channel Flip-Chip Mounted Selectively Oxidized GaAs VCSEL Array 69 64 Channel Flip-Chip Mounted Selectively Oxidized GaAs VCSEL Array Roland Jäger and Christian Jung We have designed and fabricated
More information2. Pulsed Acoustic Microscopy and Picosecond Ultrasonics
1st International Symposium on Laser Ultrasonics: Science, Technology and Applications July 16-18 2008, Montreal, Canada Picosecond Ultrasonic Microscopy of Semiconductor Nanostructures Thomas J GRIMSLEY
More informationLow Thermal Resistance Flip-Chip Bonding of 850nm 2-D VCSEL Arrays Capable of 10 Gbit/s/ch Operation
Low Thermal Resistance Flip-Chip Bonding of 85nm -D VCSEL Arrays Capable of 1 Gbit/s/ch Operation Hendrik Roscher In 3, our well established technology of flip-chip mounted -D 85 nm backside-emitting VCSEL
More informationFaculty Development Program on Micro-Electro-Mechanical Systems (MEMS Sensor)
Faculty Development Program on Micro-Electro-Mechanical Systems (MEMS Report MEMS sensors have been dominating the consumer products such as mobile phones, music players and other portable devices. With
More informationFRAUNHOFER INSTITUTE FOR PHOTONIC MICROSYSTEMS IPMS. Application Area. Quality of Life
FRAUNHOFER INSTITUTE FOR PHOTONIC MICROSYSTEMS IPMS Application Area Quality of Life Overlay image of visible spectral range (VIS) and thermal infrared range (LWIR). Quality of Life With extensive experience
More informationHermetic Packaging Solutions using Borosilicate Glass Thin Films. Lithoglas Hermetic Packaging Solutions using Borosilicate Glass Thin Films
Hermetic Packaging Solutions using Borosilicate Glass Thin Films 1 Company Profile Company founded in 2006 ISO 9001:2008 qualified since 2011 Headquarters and Production in Dresden, Germany Production
More informationImpact of the light coupling on the sensing properties of photonic crystal cavity modes Kumar Saurav* a,b, Nicolas Le Thomas a,b,
Impact of the light coupling on the sensing properties of photonic crystal cavity modes Kumar Saurav* a,b, Nicolas Le Thomas a,b, a Photonics Research Group, Ghent University-imec, Technologiepark-Zwijnaarde
More informationFlip chip Assembly with Sub-micron 3D Re-alignment via Solder Surface Tension
Flip chip Assembly with Sub-micron 3D Re-alignment via Solder Surface Tension Jae-Woong Nah*, Yves Martin, Swetha Kamlapurkar, Sebastian Engelmann, Robert L. Bruce, and Tymon Barwicz IBM T. J. Watson Research
More informationReflecting optical system to increase signal intensity. in confocal microscopy
Reflecting optical system to increase signal intensity in confocal microscopy DongKyun Kang *, JungWoo Seo, DaeGab Gweon Nano Opto Mechatronics Laboratory, Dept. of Mechanical Engineering, Korea Advanced
More informationOPTICAL COHERENCE TOMOGRAPHY: OCT supports industrial nondestructive depth analysis
OPTICAL COHERENCE TOMOGRAPHY: OCT supports industrial nondestructive depth analysis PATRICK MERKEN, RAF VANDERSMISSEN, and GUNAY YURTSEVER Abstract Optical coherence tomography (OCT) has evolved to a standard
More informationFiber-optic Michelson Interferometer Sensor Fabricated by Femtosecond Lasers
Sensors & ransducers 2013 by IFSA http://www.sensorsportal.com Fiber-optic Michelson Interferometer Sensor Fabricated by Femtosecond Lasers Dong LIU, Ying XIE, Gui XIN, Zheng-Ying LI School of Information
More informationOPTICS IN MOTION. Introduction: Competing Technologies: 1 of 6 3/18/2012 6:27 PM.
1 of 6 3/18/2012 6:27 PM OPTICS IN MOTION STANDARD AND CUSTOM FAST STEERING MIRRORS Home Products Contact Tutorial Navigate Our Site 1) Laser Beam Stabilization to design and build a custom 3.5 x 5 inch,
More informationParallel optical coherence tomography system
Parallel optical coherence tomography system Yuan Luo, 1,3, * Lina J. Arauz, 1 Jose E. Castillo, 1 Jennifer K. Barton, 1,2,3 and Raymond K. Kostuk 1,3 1 Department of Electrical and Computer Engineering,
More informationVixar High Power Array Technology
Vixar High Power Array Technology I. Introduction VCSELs arrays emitting power ranging from 50mW to 10W have emerged as an important technology for applications within the consumer, industrial, automotive
More informationReducing MEMS product development and commercialization time
Reducing MEMS product development and commercialization time Introduction Fariborz Maseeh, Andrew Swiecki, Nora Finch IntelliSense Corporation 36 Jonspin Road, Wilmington MA 01887 www.intellisense.com
More informationMEDIA RELEASE FOR IMMEDIATE RELEASE 26 JULY 2016
MEDIA RELEASE FOR IMMEDIATE RELEASE 26 JULY 2016 A*STAR S IME KICKS OFF CONSORTIA TO DEVELOP ADVANCED PACKAGING SOLUTIONS FOR NEXT-GENERATION INTERNET OF THINGS APPLICATIONS AND HIGH-PERFORMANCE WIRELESS
More informationInvestigation of ultrasmall 1 x N AWG for SOI- Based AWG demodulation integration microsystem
University of Wollongong Research Online Faculty of Engineering and Information Sciences - Papers: Part A Faculty of Engineering and Information Sciences 2015 Investigation of ultrasmall 1 x N AWG for
More informationThree-dimensional quantitative phase measurement by Commonpath Digital Holographic Microscopy
Available online at www.sciencedirect.com Physics Procedia 19 (2011) 291 295 International Conference on Optics in Precision Engineering and Nanotechnology Three-dimensional quantitative phase measurement
More informationOCT mini-symposium. Presenters. Donald Miller, Indiana Univ. Joseph Izatt, Duke Univ. Thomas Milner, Univ. of Texas at Austin Jay Wei, Zeiss Meditec
OCT mini-symposium Presenters Donald Miller, Indiana Univ. Joseph Izatt, Duke Univ. Thomas Milner, Univ. of Texas at Austin Jay Wei, Zeiss Meditec Starlight, eyebright Canberra Times, Australia Combining
More informationSub-50 nm period patterns with EUV interference lithography
Microelectronic Engineering 67 68 (2003) 56 62 www.elsevier.com/ locate/ mee Sub-50 nm period patterns with EUV interference lithography * a, a a b b b H.H. Solak, C. David, J. Gobrecht, V. Golovkina,
More informationElectronically tunable fabry-perot interferometers with double liquid crystal layers
Electronically tunable fabry-perot interferometers with double liquid crystal layers Kuen-Cherng Lin *a, Kun-Yi Lee b, Cheng-Chih Lai c, Chin-Yu Chang c, and Sheng-Hsien Wong c a Dept. of Computer and
More informationTemporal coherence characteristics of a superluminescent diode system with an optical feedback mechanism
VI Temporal coherence characteristics of a superluminescent diode system with an optical feedback mechanism Fang-Wen Sheu and Pei-Ling Luo Department of Applied Physics, National Chiayi University, Chiayi
More informationDesign, Fabrication and Characterization of Very Small Aperture Lasers
372 Progress In Electromagnetics Research Symposium 2005, Hangzhou, China, August 22-26 Design, Fabrication and Characterization of Very Small Aperture Lasers Jiying Xu, Jia Wang, and Qian Tian Tsinghua
More information2D Asymmetric Silicon Micro-Mirrors for Ranging Measurements
D Asymmetric Silicon Micro-Mirrors for Ranging Measurements Takaki Itoh * (Industrial Technology Center of Wakayama Prefecture) Toshihide Kuriyama (Kinki University) Toshiyuki Nakaie,Jun Matsui,Yoshiaki
More informationNTU RECIPIENTS OF NRF S PROOF OF CONCEPT SCHEME GRANTS. 1. A Semantics-Based and Service-Oriented Framework for the Virtualisation of Sensor Networks
Reg. No. 200604393R FACT SHEET For immediate release Total: 7 pages including this page Singapore, 21 August 2009 NTU RECIPIENTS OF NRF S PROOF OF CONCEPT SCHEME GRANTS 1. A Semantics-Based and Service-Oriented
More informationSensitivity Enhancement of Bimaterial MOEMS Thermal Imaging Sensor Array using 2-λ readout
Sensitivity Enhancement of Bimaterial MOEMS Thermal Imaging Sensor Array using -λ readout O. Ferhanoğlu, H. Urey Koç University, Electrical Engineering, Istanbul-TURKEY ABSTRACT Diffraction gratings integrated
More informationTrue Three-Dimensional Interconnections
True Three-Dimensional Interconnections Satoshi Yamamoto, 1 Hiroyuki Wakioka, 1 Osamu Nukaga, 1 Takanao Suzuki, 2 and Tatsuo Suemasu 1 As one of the next-generation through-hole interconnection (THI) technologies,
More informationphotolithographic techniques (1). Molybdenum electrodes (50 nm thick) are deposited by
Supporting online material Materials and Methods Single-walled carbon nanotube (SWNT) devices are fabricated using standard photolithographic techniques (1). Molybdenum electrodes (50 nm thick) are deposited
More informationMEMS in ECE at CMU. Gary K. Fedder
MEMS in ECE at CMU Gary K. Fedder Department of Electrical and Computer Engineering and The Robotics Institute Carnegie Mellon University Pittsburgh, PA 15213-3890 fedder@ece.cmu.edu http://www.ece.cmu.edu/~mems
More informationattocfm I for Surface Quality Inspection NANOSCOPY APPLICATION NOTE M01 RELATED PRODUCTS G
APPLICATION NOTE M01 attocfm I for Surface Quality Inspection Confocal microscopes work by scanning a tiny light spot on a sample and by measuring the scattered light in the illuminated volume. First,
More informationAssembly and Experimental Characterization of Fiber Collimators for Low Loss Coupling
Assembly and Experimental Characterization of Fiber Collimators for Low Loss Coupling Ruby Raheem Dept. of Physics, Heriot Watt University, Edinburgh, Scotland EH14 4AS, UK ABSTRACT The repeatability of
More informationDiffraction, Fourier Optics and Imaging
1 Diffraction, Fourier Optics and Imaging 1.1 INTRODUCTION When wave fields pass through obstacles, their behavior cannot be simply described in terms of rays. For example, when a plane wave passes through
More informationMillimeter-Wave and Terahertz Antennas: from PCB to Silicon
Millimeter-Wave and Terahertz Antennas: from PCB to Silicon Sanming Hu, Hongfu Meng, Wenbin Dou State Key Laboratory of Millimeter Waves, Southeast University, Nanjing, China 17 th Oct., APCAP2017, Xi
More informationPamidighantam V Ramana, Li Jing, Jayakrishnan Chandrappan, Lim Teck Guan, Zhang Jing, John Lau Hon Shing, Dim Lee Kwong, Optical design of a miniature semi-integrated tunable laser on a Silicon Optical
More informationCapabilities of Flip Chip Defects Inspection Method by Using Laser Techniques
Capabilities of Flip Chip Defects Inspection Method by Using Laser Techniques Sheng Liu and I. Charles Ume* School of Mechanical Engineering Georgia Institute of Technology Atlanta, Georgia 3332 (44) 894-7411(P)
More informationInvestigation of the Near-field Distribution at Novel Nanometric Aperture Laser
Investigation of the Near-field Distribution at Novel Nanometric Aperture Laser Tiejun Xu, Jia Wang, Liqun Sun, Jiying Xu, Qian Tian Presented at the th International Conference on Electronic Materials
More informationImaging the Subcellular Structure of Human Coronary Atherosclerosis Using 1-µm Resolution
Imaging the Subcellular Structure of Human Coronary Atherosclerosis Using 1-µm Resolution Optical Coherence Tomography (µoct) Linbo Liu, Joseph A. Gardecki, Seemantini K. Nadkarni, Jimmy D. Toussaint,
More informationLecture 22 Optical MEMS (4)
EEL6935 Advanced MEMS (Spring 2005) Instructor: Dr. Huikai Xie Lecture 22 Optical MEMS (4) Agenda: Refractive Optical Elements Microlenses GRIN Lenses Microprisms Reference: S. Sinzinger and J. Jahns,
More informationProfile Measurement of Resist Surface Using Multi-Array-Probe System
Sensors & Transducers 2014 by IFSA Publishing, S. L. http://www.sensorsportal.com Profile Measurement of Resist Surface Using Multi-Array-Probe System Shujie LIU, Yuanliang ZHANG and Zuolan YUAN School
More informationA Laser-Based Thin-Film Growth Monitor
TECHNOLOGY by Charles Taylor, Darryl Barlett, Eric Chason, and Jerry Floro A Laser-Based Thin-Film Growth Monitor The Multi-beam Optical Sensor (MOS) was developed jointly by k-space Associates (Ann Arbor,
More informationBroadband All-Optical Ultrasound Transducer
1st International Symposium on Laser Ultrasonics: Science, Technology and Applications July 16-18 2008, Montreal, Canada Broadband All-Optical Ultrasound Transducer Yang HOU 1, Jin-Sung KIM 1, Shai ASHKENAZI
More informationE LECTROOPTICAL(EO)modulatorsarekeydevicesinoptical
286 JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 26, NO. 2, JANUARY 15, 2008 Design and Fabrication of Sidewalls-Extended Electrode Configuration for Ridged Lithium Niobate Electrooptical Modulator Yi-Kuei Wu,
More informationHigh-speed 1-frame ms scanning confocal microscope with a microlens and Nipkow disks
High-speed 1-framems scanning confocal microscope with a microlens and Nipkow disks Takeo Tanaami, Shinya Otsuki, Nobuhiro Tomosada, Yasuhito Kosugi, Mizuho Shimizu, and Hideyuki Ishida We have developed
More informationOptimal Pupil Design for Confocal Microscopy
Optimal Pupil Design for Confocal Microscopy Yogesh G. Patel 1, Milind Rajadhyaksha 3, and Charles A. DiMarzio 1,2 1 Department of Electrical and Computer Engineering, 2 Department of Mechanical and Industrial
More informationChapter 11 Testing, Assembly, and Packaging
Chapter 11 Testing, Assembly, and Packaging Professor Paul K. Chu Testing The finished wafer is put on a holder and aligned for testing under a microscope Each chip on the wafer is inspected by a multiple-point
More information:... resolution is about 1.4 μm, assumed an excitation wavelength of 633 nm and a numerical aperture of 0.65 at 633 nm.
PAGE 30 & 2008 2007 PRODUCT CATALOG Confocal Microscopy - CFM fundamentals :... Over the years, confocal microscopy has become the method of choice for obtaining clear, three-dimensional optical images
More informationMEASUREMENT APPLICATION GUIDE OUTER/INNER
MEASUREMENT APPLICATION GUIDE OUTER/INNER DIAMETER Measurement I N D E X y Selection Guide P.2 y Measurement Principle P.3 y P.4 y X and Y Axes Synchronous Outer Diameter Measurement P.5 y of a Large Diameter
More informationLab Report 3: Speckle Interferometry LIN PEI-YING, BAIG JOVERIA
Lab Report 3: Speckle Interferometry LIN PEI-YING, BAIG JOVERIA Abstract: Speckle interferometry (SI) has become a complete technique over the past couple of years and is widely used in many branches of
More informationUV EXCIMER LASER BEAM HOMOGENIZATION FOR MICROMACHINING APPLICATIONS
Optics and Photonics Letters Vol. 4, No. 2 (2011) 75 81 c World Scientific Publishing Company DOI: 10.1142/S1793528811000226 UV EXCIMER LASER BEAM HOMOGENIZATION FOR MICROMACHINING APPLICATIONS ANDREW
More informationMEMS enabled microscopes for in-vivo studies of cancer biology
MEMS enabled microscopes for in-vivo studies of cancer biology Olav Solgaard, Department of Electrical Engineering Stanford University, Stanford, CA 94305-4088 Abstract A prevalent trend in biological
More informationHigh-yield Fabrication Methods for MEMS Tilt Mirror Array for Optical Switches
: MEMS Device Technologies High-yield Fabrication Methods for MEMS Tilt Mirror Array for Optical Switches Joji Yamaguchi, Tomomi Sakata, Nobuhiro Shimoyama, Hiromu Ishii, Fusao Shimokawa, and Tsuyoshi
More information6 Electromagnetic Field Distribution Measurements using an Optically Scanning Probe System
6 Electromagnetic Field Distribution Measurements using an Optically Scanning Probe System TAKAHASHI Masanori, OTA Hiroyasu, and ARAI Ken Ichi An optically scanning electromagnetic field probe system consisting
More informationConfocal microscopy using variable-focal-length microlenses and an optical fiber bundle
Published in Applied Optics 44, issue 28, 5928-5936, 2005 which should be used for any reference to this work 1 Confocal microscopy using variable-focal-length microlenses and an optical fiber bundle Lisong
More informationElectro-Optic Sensors for RF Electric Fields: a Diagnostic Tool for Microwave Circuits and Antennas
Electro-Optic Sensors for RF Electric Fields: a Diagnostic Tool for Microwave Circuits and Antennas If any of the enclosed materials are to be cited in other publications, the users are responsible for
More informationApplications of Optics
Nicholas J. Giordano www.cengage.com/physics/giordano Chapter 26 Applications of Optics Marilyn Akins, PhD Broome Community College Applications of Optics Many devices are based on the principles of optics
More informationCharacterization and Micro-assembly of Electrostatic Actuators for 3-DOF Micromanipulators in Laser Phonomicrosurgery
Characterization and Micro-assembly of Electrostatic Actuators for 3-DOF Micromanipulators in Laser Phonomicrosurgery Eakkachai Pengwang Institute of Field Robotics King Mongkut s University of Technology
More informationUltrasound-modulated optical tomography of absorbing objects buried in dense tissue-simulating turbid media
Ultrasound-modulated optical tomography of absorbing objects buried in dense tissue-simulating turbid media Lihong Wang and Xuemei Zhao Continuous-wave ultrasonic modulation of scattered laser light was
More informationAn Optical Characteristic Testing System for the Infrared Fiber in a Transmission Bandwidth 9-11μm
An Optical Characteristic Testing System for the Infrared Fiber in a Transmission Bandwidth 9-11μm Ma Yangwu *, Liang Di ** Center for Optical and Electromagnetic Research, State Key Lab of Modern Optical
More informationMultiband Solar Concentrator using Transmissive Dichroic Beamsplitting
Multiband Solar Concentrator using Transmissive Dichroic Beamsplitting Jason H. Karp and Joseph E. Ford Photonics Systems Integration Lab University of California, San Diego Jacobs School of Engineering
More informationNon-contact Photoacoustic Tomography using holographic full field detection
Non-contact Photoacoustic Tomography using holographic full field detection Jens Horstmann* a, Ralf Brinkmann a,b a Medical Laser Center Lübeck, Peter-Monnik-Weg 4, 23562 Lübeck, Germany; b Institute of
More informationRapid fabrication of ultraviolet-cured polymer microlens arrays by soft roller stamping process
Microelectronic Engineering 84 (2007) 355 361 www.elsevier.com/locate/mee Rapid fabrication of ultraviolet-cured polymer microlens arrays by soft roller stamping process Chih-Yuan Chang, Sen-Yeu Yang *,
More informationFIRST REPORTED in the field of fiber optics [1], [2],
1200 IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, VOL. 5, NO. 4, JULY/AUGUST 1999 Polarization Effects in Optical Coherence Tomography of Various Biological Tissues Johannes F. de Boer, Shyam
More informationREAL TIME THICKNESS MEASUREMENT OF A MOVING WIRE
REAL TIME THICKNESS MEASUREMENT OF A MOVING WIRE Bini Babu 1, Dr. Ashok Kumar T 2 1 Optoelectronics and communication systems, 2 Associate Professor Model Engineering college, Thrikkakara, Ernakulam, (India)
More informationAxsun OCT Swept Laser and System
Axsun OCT Swept Laser and System Seungbum Woo, Applications Engineer Karen Scammell, Global Sales Director Bill Ahern, Director of Marketing, April. Outline 1. Optical Coherence Tomography (OCT) 2. Axsun
More informationFabrication of microstructures on photosensitive glass using a femtosecond laser process and chemical etching
Fabrication of microstructures on photosensitive glass using a femtosecond laser process and chemical etching C. W. Cheng* 1, J. S. Chen* 2, P. X. Lee* 2 and C. W. Chien* 1 *1 ITRI South, Industrial Technology
More informationSHELLCASE-TYPE WAFER-LEVEL PACKAGING SOLUTIONS: RF CHARACTERIZATION AND MODELING
SHELLCASE-TYPE WAFER-LEVEL PACKAGING SOLUTIONS: RF CHARACTERIZATION AND MODELING M Bartek 1, S M Sinaga 1, G Zilber 2, D Teomin 2, A Polyakov 1, J N Burghartz 1 1 Delft University of Technology, Lab of
More informationOPTICAL BEAM steering with precise control has many
JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, VOL. 23, NO. 6, DECEMBER 2014 1471 Integrated VCSEL-Microlens Scanner With Large Scan Range Jeffrey B. Chou, Niels Quack, and Ming C. Wu, Fellow, IEEE Abstract
More informationFabrication of suspended micro-structures using diffsuser lithography on negative photoresist
Journal of Mechanical Science and Technology 22 (2008) 1765~1771 Journal of Mechanical Science and Technology www.springerlink.com/content/1738-494x DOI 10.1007/s12206-008-0601-8 Fabrication of suspended
More informationMiniaturization trends in medical imaging enabled by full wafer level integration if micro camera modules
Miniaturization trends in medical imaging enabled by full wafer level integration if micro camera modules About AWAIBA o Excellence in Custom design & Standard Sensor components for Medical imaging and
More informationLecture 20: Optical Tools for MEMS Imaging
MECH 466 Microelectromechanical Systems University of Victoria Dept. of Mechanical Engineering Lecture 20: Optical Tools for MEMS Imaging 1 Overview Optical Microscopes Video Microscopes Scanning Electron
More informationElectrothermally-Actuated Micromirrors with Bimorph Actuators Bending-Type and Torsion-Type
Sensors 2015, 15, 14745-14756; doi:10.3390/s150614745 Article OPEN ACCESS sensors ISSN 1424-8220 www.mdpi.com/journal/sensors Electrothermally-Actuated Micromirrors with Bimorph Actuators Bending-Type
More informationOptical RI sensor based on an in-fiber Bragg grating. Fabry-Perot cavity embedded with a micro-channel
Optical RI sensor based on an in-fiber Bragg grating Fabry-Perot cavity embedded with a micro-channel Zhijun Yan *, Pouneh Saffari, Kaiming Zhou, Adedotun Adebay, Lin Zhang Photonic Research Group, Aston
More informationLecture 25 Optical Coherence Tomography
EEL6935 Advanced MEMS (Spring 2005) Instructor: Dr. Huikai Xie Lecture 25 Optical Coherence Tomography Agenda: OCT: Introduction Low-Coherence Interferometry OCT Detection Electronics References: Bouma
More informationμoct imaging using depth of focus extension by self-imaging wavefront division in a commonpath fiber optic probe
μoct imaging using depth of focus extension by self-imaging wavefront division in a commonpath fiber optic probe Biwei Yin, 1 Kengyeh K. Chu, 1 Chia-Pin Liang, 1 Kanwarpal Singh, 1 Rohith Reddy, 1 and
More informationattosnom I: Topography and Force Images NANOSCOPY APPLICATION NOTE M06 RELATED PRODUCTS G
APPLICATION NOTE M06 attosnom I: Topography and Force Images Scanning near-field optical microscopy is the outstanding technique to simultaneously measure the topography and the optical contrast of a sample.
More information