9 January 1984 The Endue Of Grating Spectrographs
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Abstract
The entrance slit width of a diffraction-grating spectrometer often limits the light-grasp or etendue of the instrument. The etendue may be increased by the use of a wide grating or mosaic, or one with a large blaze angle. However, those methods are not the only ones available. Further developments may use two or more gratings in arrangements other than a mosaic. These arrangements may use the different gratings in separate beams or consecutively in the same beam.
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Richard G. Bingham, Richard G. Bingham, "The Endue Of Grating Spectrographs", Proc. SPIE 0445, Instrumentation in Astronomy V, (9 January 1984); doi: 10.1117/12.966185; https://doi.org/10.1117/12.966185
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