Roque de los Muchachos Observatory

CRISP

CRISP
CRISP

The CRisp Imaging SpectroPolarimeter (CRISP) is installed in the red beam and is usable from 510 to 860 nm. It consists of 0.3-0.9 nm wide pre-filters, liquid crystal (LC) modulation, a dual Fabry-Pérot (FP) tunable filter system, and a polarizing beam splitter located close to the final focal plane and feeding two 1k×1k-pixel Sarnoff CCD cameras. The FP system has a compact telecentric optical design with a minimum number of optical surfaces and high overall transmission. MOMFBD image restoration is aided with a third CCD recording broad-band images through the pre-filter. All three cameras are synchronized by use of an external shutter.

Spectral coverage: 0.3-0.9nm

Type
Instrument type