NASA NTRS · 19650000070
Simple optical system used to align spectrograph
Abstract
Optically fast, portable spectrograph incorporates auxiliary optics in a boresight technique to use the zero order of the grating for visual alignment. This device obtains moderately resolved spectra of a multitude of light sources.
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Exton, R. J.. 1965-03-01. Simple optical system used to align spectrograph. https://ntrs.nasa.gov/citations/19650000070
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