Concept and optical design of the cross-disperser module for CRIRES+
Concept and optical design of the cross-disperser module for CRIRES+
CRIRES, the ESO high resolution infrared spectrometer, is a unique instrument which allows astronomers to access a parameter space which up to now was largely uncharted. In its current setup, it consists of a single-order spectrograph providing long-slit, single-order spectroscopy with resolving power up to R=100,000 over a quite narrow …