Grating Angle Calculator

This is an IRAF script grating calculator written by Rick Burruss. It solves for the grating angle needed to put your desired wavelength onto the center of the CCD. This angle is a function of spectral order, choice of red or blue camera geometry, and grating lines/millimeter. All of the options are laid out in the calculator. It is more accurate for the blue side camera given the chip size vs vignetting and obscuration. Please see the DBSP Overview for more information.

(click here to pop up this calculator)

Questions? We've answered many common observing and operations questions in our observer FAQ page.
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DBSP Calculator / v 1.0.3
Last updated: 18 September 2020 VAM