Offner gratings For imaging spectrometers

Hyperspectral imaging or multispectral imaging can show you what you normally cannot see. This is achieved by using spatial and wavelength resolved detection in different electromagnetic ranges (spectra).

Imaging spectroscopy has evolved into a technique for powerful multispectral imaging. Multispectral imaging or hyperspectral imagers are mostly based on Offner imaging spectrometers  with low f-numbers.

The design of a hyperspectral sensor uses three convex surfaces, including an aberration corrected convex grating and two convex mirrors together with a slit and an imaging sensor. This configuration is dedicated to applications with low resolution and high throughput requirements, enhancing the imaging quality of a spectrometer. All of the hyperspectral information is covered by a single shot sensor picture.  ZEISS Offner gratings are used in space applications to achieve the highest performance in environmental analysis.