Chrisp Compact VNIR/SWIR Imaging Spectrometer (CCVIS)

MIT Lincoln Laboratory, in collaboration with NASA, developed an imaging spectrometer that maintains state-of-the-art optical and signal-to-noise performance in a unit that has a volume ten times smaller than that of other spectrometer designs. Coupled with a freeform telescope, the spectrometer can acquire spectral imagery over a wide area, enabling remote monitoring for atmospheric science, geology, and agriculture.

Prototype of the Chrisp Compact VNIR/SWIR Imaging Spectrometer

While high-performing, state-of-the-art imaging spectrometers have reached near-perfect aberration control and high signal-to-noise ratios (SNRs), the CCVIS maintains optimal performance in a package that has reduced size, weight, and power (SWaP).

Advantages of the Chrisp Compact VNIR/SWIR Imaging Spectrometer (CCVIS)

Prototype of the Chrisp Compact VNIR/SWIR Imaging Spectrometer

• CCVIS is rugged and suitable for use as a payload on small satellites and airborne systems, including uncrewed aerial vehicles (UAVs).
• The CCVIS can be implemented as modules that, when coupled with a freeform telescope, may offer fields of view as large as 40 degrees or more.
• Local control of optical surfaces during design enables the highest degree of aberration control necessary for a spectrometer system capable of imaging over very wide fields of view. This control is enabled by Fast Accurate NURBS optimization code, which employs nonuniform rational basis-spline (NURBS) optical surfaces.
• The CCVIS flat grating is easier and faster to manufacture than the convex or concave gratings of other high-performing imaging spectrometers. The flat grating with dual-angle facets exploits grayscale lithography to produce 3D microstructures.

Additional Resources

U.S. Patent 9,689,744

More Information

M.P. Chrisp et al., "Development of a Compact Imaging Spectrometer Form for the Solar Reflective Spectral Region,"  Applied Optics, 59 (32), 10 Nov. 2020.