Imaging Spectrographs

VNIR Spectrographs

The VNIR family of spectrographs provides high optical resolution while minimizing keystone and smile aberrations. The spectrograph gratings and optics are designed to cover the full wavelength range from 400 to 1000 nm from the first order dispersion. An order blocking filter is necessary to remove the second order dispersion from overlapping with the first order. Inserting an order blocking filter in front of the camera sensor allows full VNIR wavelength coverage with one spectrograph and one camera sensor. Filters are available in different sizes and holders and are ordered separately. The VNIR spectrograph can transform a scientific gray scale CCD or CMOS camera into a line-scan hyperspectral spectrophotometer for VNIR spectroscopy imaging.

There are two series of VNIR spectrographs: Standard and Enhanced. The Enhanced Series offers the best optical performance, and is recommended for high resolution (< 3 nm) applications.

ImSpectors V10 and V10H Standard VNIR Spectrographs

As with the visible range of spectrographs, there are two separate models for the standard VNIR spectrograph, the V10 for 2/3” sensors and the V10H for 1/2” sensors. Both of these models share the same mechanical characteristics.

VNIR Spectrograph for Visible Infrared Spectroscopy - standard front view (1)VNIR Spectrograph for Visible Infrared Spectroscopy - standard side view (1)

ImSpector V10E Enhanced VNIR Spectrograph

The VNIR range of spectrographs also includes an E-Series model suitable for imaging applications that require higher spatial or spectral fidelity than available with a standard spectrograph.

VNIR Spectrograph for Visible Infrared Spectroscopy - enhanced front view (1)VNIR Spectrograph for Visible Infrared Spectroscopy - enhanced side view (1)

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

VNIR Spectrograph Specifications
  V10H V10 V10E
Optical Characteristics
Spectral Range 400 - 1000 nm 400 - 1000 nm 400 - 1000 nm
Spectral Dispersion 139 nm/mm 93.9 nm/mm 97.5 nm/mm
Spectral Resolution 11.2 nm (w/ 80 µm slit) 9 nm (w/ 80 µm slit) 2.8 nm (w/ 30 µm slit)
Spatial Resolution RMS spot radius < 40 µm RMS spot radius < 40 µm RMS spot radius < 9 µm
Image Size (Spectral x Spatial) 4.8 x 6.6 mm 6.6 x 8.8 mm max 6.15 x 14.2 mm
Numerical Aperture F/2.8 F/2.8 F/2.4
Optical Input Standard Standard Telecentric
Average Diffraction Efficiency > 50%, independent of polarization > 50%, independent of polarization > 50%, independent of polarization
Stray Light < 0.5% (halogen lamp, 633 nm notch filter) < 0.5% (halogen lamp, 633 nm notch filter) < 0.5% (halogen lamp, 633 nm notch filter)
Slit Width, default 50 µm (30, 80, and 150 µm available on request) 50 µm (30, 80, and 150 µm available on request) 30 µm (13, 18, 50, 80, and 150 µm available on request)
Slit Length 9.8 mm 9.8 mm 14.3 mm
Magnification 1:1 1:1 1:1
Aberrations
Bending of Spectral Smile < 30 µm (0.698%) Smile < 45 µm (0.68%) Smile < 1.5 µm (0.024%)
Lines Across Spatial Axis
Bending of Spatial Keystone < 20 µm (0.303%) Keystone < 40 µm (0.45%) Keystone < 1 µm (0.007%)
Lines Across Spectral Axis
Astigmatism Insignificant Insignificant None
Mechanical Characteristics
Body Anodized Aluminum Tube Anodized Aluminum Tube Anodized Aluminum Tube
Size (W x H x L) 35 x 35 x 139 mm 35 x 35 x 139 mm 60 x 60 x 175 mm
Weight 300 g 300 g 1100 g
Lens Mount Standard C-mount adapter Standard C-mount adapter Standard C-mount adapter
Camera Mount Standard C-mount adapter Standard C-mount adapter Standard C-mount adapter
User Adjustments Image axis rotation relative to detector rows, back focal length adjustable ± 1 mm (for all)
Environmental Characteristics
Storage Temperature, non-condensing -20 °C to +85 °C -20 °C to +85 °C -20 °C to +85 °C
Operating Temperature, non-condensing +5 °C to +40 °C +5 °C to +40 °C +5 °C to +40 °C
VNIR Spectrograph Ordering Information
Part numberDescriptionProduct Name
MRC-304-002-01 ImSpector – Standard VNIR Spectrograph V10, 50 μm slit* (default) ImSpector V10
MRC-304-002-02 ImSpector – Standard VNIR Spectrograph V10H, for 1/2” image sensor, 50 μm
slit* (default)
ImSpector V10H
MRC-304-002-03 ImSpector – Enhanced VNIR Spectrograph V10E, 30 μm slit* (default) ImSpector V10E

* When ordering please specify if different slit width is needed

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