Ray tracing in spectrometers with plane gratings and off-axis parabolas, including a new double pass system.
The results of some ray tracing calculations are presented in graphical form for various single and double pass configurations of a large plane grating with parabolic collimators and aperture f/10. Some advantages of systems with vertical displacement of slits above and below the grating are discussed. Results of calculations employing spherical mirrors are summarized briefly.
Eggers
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Peterson
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MA