Predicting the Mueller matrix of a many mirror system with highly powered optics across the field of view (FoV) is an important tool for the design and use of large astronomical telescopes. We validate the Zemax model by showing limiting cases for flat mirrors in collimated and powered designs that compare well with theoretical approximations and are testable with lab ellipsometers. We estimate 2% variation of some Mueller matrix elements over the 5-arc min CryoNIRSP field. Footprint variation is substantial and shows vignetted field points will have strong polarization effects. Estimates show the DKIST telescope Mueller matrix as functions of wavelength, azimuth, elevation, and field angle for the cryogenic near infra-red spectro-polarimeter (CryoNIRSP) and visible spectro-polarimeter. We develop a model coating formula that approximates measured witness sample polarization properties.
#Newtonian telescope zemax file software
The Zemax optical modeling software has polarization ray-trace capabilities and predicts system performance given a coating prescription. Telescope polarization is due to polarization-dependent mirror reflectivity and rotations between groups of mirrors as the telescope moves in altitude and azimuth. Inouye Solar Telescope (DKIST) optics and show Mueller matrices for two of the first light instruments. We outline polarization performance calculations and predictions for the Daniel K.
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