Imaging Spectrographs

Short Wave Infrared Spectrograph

The short wave infrared spectrograph designed for the SWIR (1000 - 2500 nm) wavelength range can be used to transform a SWIR camera with a wide spectral range sensor, such as a cooled mercury-cadmium-telluride (MCT) sensor, into a line-scan hyperspectral imaging device. In the SWIR range, this spectrograph offers the highest optical performance on the market, by reducing keystone and smile aberrations to sub-pixel levels.

For more information, including mechanical drawings, contact our application engineers.

Optical Characteristics
Spectral Range 1000 - 2500 nm
Spectral Dispersion 208 nm/mm
Spectral Resolution 8 nm
Spatial Resolution RMS spot radius < 15 µm
Image Size (Spectral x Spatial) max. 7.6 x 14.2 mm
Numerical Aperture F/2.0
Optical Input Telecentric
Average Diffraction Efficiency > 50%, independent of polarization
Stray Light < 0.5% (halogen lamp, 1400 nm long-pass filter)
Slit Width, default 30 µm (50 and 80 µm available on request)
Slit Length 14.3 mm
Magnification 1:1
Bending of Spectral Lines Across Spatial Axis Smile < 5 µm (0.066%)
Bending of Spatial Lines Across Spectral Axis Keystone < 5 µm (0.035%)
Astigmatism None
Mechanical Characteristics
Body Anodized Aluminum Tube
Size (W x H x L) 60 x 60 x 220 mm
Weight 1500 g
Lens Mount Standard C-mount Adapter
Camera Mount Standard U-mount Adapter
User Adjustments Image axis rotation relative to detector rows, back focal length adjustable ±1 mm
Environmental Characteristics
Storage Temperature -20 °C to +80 °C, non-condensing
Operating Temperature +5 °C to +40 °C, non-condensing
Short Wave Infrared Spectrograph Ordering Information
Part numberDescriptionProduct Name
MRC-305-005-01 ImSpector – Enhanced SWIR Spectrograph N25E, 30 µm slit* (default) ImSpector N25E

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