Growing a NASA Sponsored Metrology Project to Serve Many Applications and Industries. James Millerd President, 4D Technology

Transcription

1 Growing a NASA Sponsored Metrology Project to Serve Many Applications and Industries James Millerd President, 4D Technology

2 Outline In the Beginning Early Technology The NASA Connection NASA Programs First success at NASA Technology Evolution Where We Are Today New Applications and Industries

3 In the beginning 11/19/2014 3

4 Optical Interferometry Measure interference between optical beams traveling two different paths Fizeau Cavity T R Source I r Thin Film Interference I t OPD Detector Optical path difference Function of time, position, wavelength I ~ COS(2p/l* OPD) White Light Interference in a Bubble

5 Temporal Phase-Shift Interferometry 3p p 2 2 Laser 1 0 I r Reference Surface I t Test Surface Δh I n = I T (1+gCOS( + n ) I 1 = I T (1+γCos( )) I 2 = I T (1-γSin( )) I 3 = I T (1-γCos( )) 4p Dh/l g 2 (It Ir)/(It+Ir) Detector Array I (x,y) Tan( ( x, y)) I 4 = I T (1+γSin( )) 120 milliseconds for acquisition I 4( x, y) I I ( x, y) I ( x, y) ( x, y) l Height( x, y) ( x, y) 4p

6 Polarization Phase Shift Method Use polarizer as phase shifter LHC ref RHC test Circular polarized beams (q) + linear polarizer (a) I = I T (1+gCos (q + 2a)) Phase-shift depends on polarizer angle Kothiyal and Delsile, (1985) 11/19/2014 4DTechnology Corporation 6

7 Early Technology Image division + bulk polarization elements Single Frame Acquisition Simplified Optical Setup

8 The NASA Connection 11/19/2014 8

9 The NASA Connection Then we met Phil + 11/19/2014 9

10 NASA Related Projects 2001 PhaseCam Modal Analysis 4Mpix + Zoom 2004 FizCam Mirror Vibration testing 2003 Multi-wavelength Secondary cryo-test Short Coherence 300mm Segment cryo-figure Segment phasing 2006 SpeckleCam Auto-collimating flats Backplane cryo-stability 2011 High-speed 1000fps NASA, ITT, Ball, Tinsley segment vibration /19/

11 Cryo-figuring of mirror segments 1) Polish 2) Measure at ambient Dynamic Interferometer 3) Measure at cryogenic temp Thermal Chamber Dynamic Interferometer Residual

12 First application NASA Marshall - XRCF 11/19/

13 Ball Aerospace Deep Impact Spec Figure testing of 300 mm Zerodur mirrors at cryogenic temperatures, Baer & Lotz, SPIE July /19/

14 Mirror Segment Discontinuity

15 Dynamic Phase-shift with Micropolarizer Array Array of oriented micropolarizers Similar to RGB color mask a 45, =90 RHC a 0, =0 Er( x, y) Unit Cell Et ( x, y) LHC a 135, =270 a 90, =180 All data is gathered in a single camera frame Allows common path optical arrangement (no tilted beams) Works with broadband source (multi-l, or white light) 11/19/2014 US Patent 7,230,719 15

16 Remote Cavity Application JWST Secondary Mirror Test Configuration 80cm diameter hyperboloid surface FizCam 2000 with F/5 diverging lens Cryogenic optical testing results of JWST aspheric test plate lens Koby Z. Smith, Timothy C. Towell, Proc. of SPIE Vol O-7 11/19/2014 4DTechnology Corporation 16

17 PhaseCam - ESPI Measurement of nm displacement of diffuse objects at 10 s meters standoff Peter Blake, et. al., "Spatially phase-shifted digital speckle pattern interferometry (SPS-DSPI) and cryogenic structures: recent improvements", Proceedings of SPIE Vol

18 Other Applications and Industries

19 4D Technology 4D instruments measure surface, wavefront, and polarization, enabling our customers to: Build next generation optical instruments Space-based optical systems Large astronomical telescopes Improve manufacturing of industrial and consumer products Semiconductors, displays, data storage Flexible electronics Increase fundamental understanding Bio-medical research Astronomy employees 11/19/2014

20 International Sales, Service and Support 20

21 Semiconductor and MEMS 193nm Photolithography Wafer chucks Digital micro-mirror device 11/19/

22 FizCam Data Storage Short coherence source Reference HDD Blank ΔL = 1.60 mm Path Matched Plane Disk drive excited at 400Hz Camera 11/19/

23 NanoCam NanoCam 3D - Optical surface roughness critical for large optics Micro-scope based system Dynamic Measurement operation anywhere In-situ polishing process control (On-tool) On-optic measurement Courtesy of Zeeko Ltd Courtesy Optical Surface Technologies 23

24 BioCam Quantitative Biological Imaging Rat cardiac myocytes before & after medication Both frequency and strength are measured

25 PhaseCam - Ophthalmic Cornea measurement Tear film dynamics Optics 11/19/

26 PolarCam Micropolarizer Camera Enables whole-field, Dynamic polarimetry Wide variety of wavelengths and sensor formats Passive illumination Target discrimination, Image enhancement Reference Camera Enhanced with DoLP 11/19/2014 4D Technology Corporation 26

27 PolarCam Active Illumination Real-time, quantitative, independent of orientation Product inspection (e.g. containers, packaging, eye wear) 25mm diameter window: 0 70 nm birefringence 27 4D Technology Corporation 11/19/2014

28 4D and NASA NASA sponsored development has lead to: New Technology Sustained Job Creation Better Metrology for Telescopes Industrial Process Improvement Fundamental Science Disk drive 400Hz Courtesy of Ball Aerospace Courtesy of Zeeko Ltd. 11/19/

29 Thank you! 11/19/