White Pupil Échelle Spectrograph

Application ID: 54881

Échelle spectrographs are commonly used in astronomy for high-resolution analyses of stellar atmospheres and for precision Doppler velocimetry. This tutorial simulates a "white pupil" form of this instrument. It makes use of several parts from the COMSOL Part Library and demonstrates the creation of a complex fully parameterized geometry. Two grating components are included, and the use of the Diffraction Order node is demonstrated. The échelle grating is used in high order and a parametric sweep across several orders (with several wavelengths in each order) is made and the resulting ray and échelle diagrams are generated.

This model example illustrates applications of this type that would nominally be built using the following products: