Spectrograph efficiency at high dispersions

Details Spectrograph efficiency at high dispersions Spectrograph efficiency at high dispersions

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983obs...103...12w&link_type=abstract

The Observatory, vol. 103, p. 12-16 (1983)

Physics

1

Scientific paper

In a spectrograph employing high angular dispersion, large angles of incidence upon the collimator can cause considerable loss of light. Not only may the grating be over-filled, but the diffracted beam may be so dilated in the dispersion azimuth that it cannot be transmitted by available cameras. The effect can be reduced, without loss of dispersion, by reducing the width of the collimated beam falling on the grating.

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