Oriel MS260i TM 1/4 m Imaging Spectrograph

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1 Oriel MS260i TM 1/4 m Imaging Spectrograph MS260i Spectrograph with 3 Track Fiber on input and InstaSpec CCD on output. The MS260i 1 4 m Imaging Spectrographs are economical, fully automated, multi-grating instruments. We offer single and dual output models with dual and triple grating mounts. All are F/3.9 instruments with a flat, 28 mm image plane for multichannel detectors. Stray light is negligible, re-entrant spectra are eliminated, throughput is high, and spatial and spectral resolution are impressive. And, they are now offered with USB 2.0 interfaces. RS-232 and IEEE-488 interfaces are also still available. Why The MS260i? The MS260i Spectrographs are an economical alternative to our fully featured, MS257 (found on page 1196). To keep costs down, we removed some of the features from the MS257, without compromising performance. The result is a family of instruments with very good spatial and spectral resolution. The dual grating instrument offers improved resolution, over the triple grating instrument. Spatial resolution is 40 µm for the dual grating model, compared to 50 µm for the triple grating version. The grating mounts are interchangeable, so if you currently have a triple grating MS260i, you can easily convert it to a dual grating instrument. Simply choose two "Dual Grating ". These assemblies mount directly to the turret in your MS260i. Optical Configuration Fig. 1 shows the asymmetrical in-plane Czerny-Turner optical configuration of a dual grating MS260i. The input F/# is F/3.9, and the input and exit focal lengths are unequal 220 and 257 mm. A set of computer optimized toroidal mirrors produce accurate images of the input slit in the flat output plane. The superior spatial resolution of the MS260i sets it apart from most other imaging spectrographs; the aberration limited spatial resolution is 40 µm (FWHM), for the dual grating instrument. ENTRANCE EXIT Fig. 1 Optical configuration of a dual grating MS260i Imaging Spectrograph New, USB2.0 models High resolution Up to three gratings, with computer controlled grating change Built-in shutter Built-in filter wheel control Designed for Multi-track Spectroscopy Multi-track Spectroscopy is the simultaneous recording of multiple spectra. One of the factors limiting the number of spectra which can be recorded simultaneously is the spectrograph s magnification. MS260i uses toroidal mirrors instead of the more common but poorly imaging spherical mirrors. The result is a 1.1 horizontal and 1.6 vertical magnification. It is important to note here that both the dual grating and the triple grating MS260i Spectrographs have the same magnifications, and can therefore resolve the same number of tracks from an Oriel Multi-Track Fiber (described on page 1304). However, the image quality from a dual grating MS260i is superior to that from a triple grating instrument. Dual Output Ports We offer single and dual output port MS260i Imaging Spectrographs. The dual output port instruments give you added versatility without compromise in performance; you can mount a silicon array on one port and an InGaAs array on the other, for extended wavelength measurements. These have a motorized flip mirror to switch between ports; the flip mirror can be controlled via the Hand Controller or MS260i Command Set. Stray Light One of the design criteria for MS260i was to mimimize stray light. It is important that diffracted light not be allowed to reflect from the mirrors, or from the face of a focal plane detector, back onto the grating. This light could then be rediffracted and cause ghost images or stray light at the detector. The wide open optical layout and exaggerated tilt of the exit focal plane of the MS260i ensure that there is zero re-entrant spectra. Instrument Control We offer MS260i Spectrographs with USB 2.0 or with RS232 and IEEE-488 interfaces. You can communicate with any of the MS260i instruments in one of 3 manners. Hand Controller The Hand Controller lets you set the instrument parameters and perform all the functions of the MS260i, e.g. wavelength changes, grating change and open/close shutter, and it controls the MS260i accessories such as the filter wheel. The 1215

2 1216 Spectroscopy Instruments SINGLE CHANNEL DETECTION SYSTEMS MINISPECTROMETERS BENCHTOP SPECTROMETERS FT-IR SPECTROMETERS is a dedicated hand controller; this means that the keys are labeled with intuitive commands, e.g. Go Wave, so you don t have to memorize key sequences to perform a function. Instrument parameters (grating lines/mm, filter wheel position, current wavelength and shutter status) are always displayed on the backlit LCD. Computer Control The computer interface was also designed for simplicity and ease of use. The MS260i ASCII command set is simple to use via RS 232 or GPIB. For example, close the shutter is SHUTTER C and change to the second grating is GRAT 2. The USB version utilizes an ActiveX control for ease of programming via VB, LabView, Excel, MatLab or any application supporting ActiveX controls. Complete Software Packages We offer various software applications for the MS260i: A simple utility program to get up and running right away (included with all MS260i instruments) For LabView programming we offer VIs (included with all MS260i TM instruments) InstaSpec Softare; our InstaSpec Multichannel Detectors include a Windows based instrument control and data acquisition software. This application acquires, processes and displays the data in real time. Through the software you can control the MS260i and its accessories (filter wheel and shutter). TRACQ Pro ; this optional program is our advanced Spectroscopy Software Application; it allows control of all Oriel spectroscopic instruments; see page 1220 for details. Interchangeable Gratings The MS260i holds two or three gratings simultaneously (depending upon the grating assemblies that you choose). Each grating is mounted in an individual, pre-aligned mount. If you intend to use the Spectrograph as a dual grating instrument, order two grating assemblies from the "Dual Grating " list in Table 1. If you intend to use the MS260i as a triple grating instrument, choose your gratings from the "Triple Grating " list. Add Gratings in the Field You can add and change gratings in the field without changing the instrument's grating turret. However, you may have to replace your current grating assemblies. If you want to change a dual grating instrument to a triple grating instrument, you cannot simply order a third grating; all three of your gratings need to be Triple Grating. Equally, if you wish to convert your Triple Grating MS260i to a Dual Grating instrument (to improve resolution), you can't simply remove one grating; you will need to order two new Dual Grating. Motorized Slit Assembly Automated resolution control Variable width from 6 µm to 3 mm ±5 µm repeatabilty 6 µm resolution ±10 µm accuracy This is our most versatile slit assembly. Change your instrument s resolution by varying the slit width from 6 µm to 3 mm, in 6 µm steps. To operate a motorized slit, you also need the Slit Control Board; this board operates up to three motorized slits. Control is via the Hand Controller, or software. Micrometer Driven Slit Assembly Continuously variable width from 4 µm to 3 mm Continuously variable height from 2 to 12 mm ±10 µm repeatability ±10 µm accuracy from 4 to 250 µm, ±5% from 250 µm to 3mm The Slit Assembly offers you the greatest flexibility to change widths. A precision micrometer opens the assembly from 4 µm to 3 mm wide. Multiple Fixed Slit Assembly 8 fixed slit positions from 50 µm to 3.16 mm Slit height is adjustable from 1 to 12 mm The is a rotating disc with 8 fixed and detented slits. A manual wheel rotates the disc to the desired slit position. Fixed Slits Most economical for single slit size Fixed width and height If you only need a few slit sizes, a fixed slit assembly is the most practical choice. Order the Fixed Slit Holder and one or more fixed slits. The slits slide into the 77294; interchange slits without losing position. The Filter Wheel holds up to six 1.0 inch (25.4 mm) diameter neutral density or bandpass filters; the clear aperture is 0.87 inch (22 mm). It mounts directly to the input port of the MS260i. Even with the attached, the spectrograph F/number is still F/3.9. ACCESSORIES FOR Four Types of Slits The MS260i requires an input slit assembly; we offer four types. All have a 1.5 Inch Series male flange. Mate any female flanged component directly to the slit. Phone: Fax:

3 1217 Table 1 Grating Specifications for the MS260i 1/4 m Spectrograph Simple Filter Interchange Spectral Resolution (nm)* The MS260i controls will also command the filter wheel. Filter changeover is only 1 second for adjacent filters. Filters are held in individual mounts which snap into place from the top of the wheel. The individual filter holders (six are included with each wheel) are also sold separately under model so you can mount all your filters for ready insertion into the filter wheel. The Rod Mount holds a Filter Holder atop an optical rod. Multichannel Array Bandpass (nm)** Primary Region *** Built-in Shutter A 0.5 Hz repetition rate shutter is built into the MS260i. You can close the shutter for dark current measurements, or when changing a grating, to protect the detector. A shutter is required for almost all CCD applications (except full vertical binning mode). Minimum exposure time for the shutter is 0.2 s. The shutter is activated from the MS260i controls or via an externally applied TTL gate. Shutter Specifications Instrument's Upper Mechanical Limit (for specificed grating) Line Density (I/mm) Blaze Type Peak Efficiency (%) Dual Grating Triple Grating Holographic nm 600 nm Holographic nm 800 nm Holographic nm 1200 nm Ruled nm 1200 nm Ruled **** nm 1200 nm Ruled nm 1200 nm Ruled **** nm 1200 nm Ruled nm 2400 nm Ruled nm 2400 nm Ruled nm 2400 nm Ruled nm 2400 nm Ruled nm 2400 nm Ruled nm 3600 nm Ruled nm 3600 nm Ruled nm 4.8 µm Ruled nm 4.8 µm Ruled nm 4.8 µm Ruled nm 5.8 µm Ruled nm 7.2 µm Ruled nm 9.6 µm Ruled nm 9.6 µm Ruled nm 9.6 µm Ruled nm 9.6 µm Ruled nm 11.8 µm Ruled nm 19.2 µm *Measured with 10 µm x 2 mm slit and 26 x 26 µm pixel array (1024 pixels), for triple grating model. For dual grating model, expect 30-50% better resolution. **Across a 1 inch array, with grating centered at blaze wavelength. ***The primary wavelength region is where the grating efficiency is 20%. System efficiency will also be affected by the reflectivity of the mirrors and the grating angle, at any wavelength. ****Measured with 24 x 24 µm pixel array and 10 µm x 2 mm slit. Light Leakage <0.001 Minimum Exposure Time 0.2 s Maximum Frequency 0.5 Hz Transition Rise Time ~2 ms Response Delay ~20 ms Blade Coating black anodized External Trigger TTL

4 1218 Spectroscopy Instruments Specifications SINGLE CHANNEL DETECTION SYSTEMS MINISPECTROMETERS Focal Length 257 mm F/# F/3.9 Reciprocal Dispersion (nm/mm) 3.22 nm/mm Usable Range 180 nm to 24 µm, with interchangeable grating Spectral Resolution (triple grating instruments) (triple grating instruments)* 0.20 nm, 1200 l/mm grating, 10 µm x 2 mm slits, 26 µm wide pixels Spatial Resolution (triple grating instruments) * ~50 µm (FWHM) Spectral Resolution (dual grating instruments)(dual grating instruments)* 0.15 nm, 1200 l/mm grating, 10 µm x 2 mm slits, 26 µm wide pixels Spatial Resolution (dual grating instruments)* ~40 µm (FWHM) Accuracy 0.35 nm Precision 0.08 nm Maximum Slew Rate 193 nm/s Horizontal Magnification 1:1 Vertical Magnification 1.6 Weight 21 lb (11 kg) * Spatial and spectral resolution are measured independently and optimized with the focus adjustment. Ordering Information MS260i Imaging 1/4 m Spectrographs Description Interface(s) No. of Output Ports MS260i 1/4 m Spectrograph MS260i 1/4 m Spectrograph MS260i 1/4 m Spectrograph MS260i 1/4 m Spectrograph USB USB RS-232 and IEEE RS-232 and IEEE BENCHTOP SPECTROMETERS 5.38 (136.6) 1.5 INCH SERIES MALE FLANGE 11.0 (279.4) (298.5) DISTANCE FROM OUTSIDE WALL TO FOCAL PLANE = 10 mm 1.5 (38) x 0.76 (19.05) EXIT SLOT 3.52 (89.4) 2.38 (60.4) FT-IR SPECTROMETERS (362) 6.38 (162) (346) Fig. 2 Dimensional diagram of MS260i Imaging 1/4 m Spectrograph ACCESSORIES FOR Phone: Fax:

5 1219 Gratings Line Density (I/mm) Spectral Resolution (nm) Multichannel Array Bandpass (nm) Primary Region *** Blaze Type Peak Efficiency (%) Holographic nm 600 nm $ $ Holographic nm 800 nm $ $ Holographic nm 1200 nm $ $ Ruled nm 1200 nm $ $ Ruled nm 1200 nm $ $ Ruled nm 1200 nm $ $ Ruled nm 1200 nm $ $ Ruled nm 2400 nm $ $ Ruled nm 2400 nm $ $ Ruled nm 2400 nm $ $ Ruled nm 2400 nm $ $ Ruled nm 2400 nm $ $ Ruled nm 3600 nm $ $ Ruled nm 3600 nm $ $ Ruled nm 4.8 µm $ $ Ruled nm 4.8 µm $ $ Ruled nm 4.8 µm $ $ Ruled nm 5.8 µm $ $ Ruled nm 7.2 µm $ $ Ruled nm 9.6 µm $ $ Ruled nm 9.6 µm $ $ Ruled nm 9.6 µm $ $ Ruled nm 9.6 µm $ $ Ruled nm 11.8 µm $ $ Ruled nm 19.2 µm $ $663 Slit Description Micrometer Driven Slit Assembly Multiple Fixed Slit Assembly Motorized Input Slit Assembly Motorized Lateral Output Slit Assembly Motorized Axial Output Slit Assembly Motorized Slit Control Board (Controls up to 3 Motorized Slit ) Fixed Slit Holder Accessories Description Hand Controller Motorized Filter Wheel Filter Holder (6 included with 74010) Rod Mount for Filter Holder See our website WEB for more info Fixed Slits Slit Width (µm) Instrument's Upper Mechanical Limit (for specificed grating) Slit Height (mm) Dual Grating Triple Grating nm (nm) * ** ** ** ** ** ** ** ** ** * This value is for 1200 l/mm grating and 1024 or 2048 element array. ** For 1200 l/mm grating and 1024 array with 26x26 µm pixels. For 200 µm high pixels (2048 element array), the resolution is 1/2 this value.