Two design approaches for high efficiency low resolution spectroscopy.

Details Two design approaches for high efficiency low resolution spectroscopy. Two design approaches for high efficiency low resolution spectroscopy.

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984spie..445..522e&link_type=abstract

Instrumentation in astronomy V, p. 522 - 529

Astronomy and Astrophysics

Astronomy

5

Optical Design:Spectrographs, Spectrographs:Optical Design

Scientific paper

In the course of a systematic analysis of various design philosophies aimed at achieving high optical throughput low resolution spectrometers for telescopes in the range of 2 - 4 meters, two distinct optical designs were established. The first is optimised for a telescope prime focus having a fast F/ratio, and is based on a concave grating whose aberrations are corrected by 2 or 3 off-axis lenses. The second system is a focal reducer, utilizing lenses and transmission gratings only. Both designs provide a two-dimensionally corrected field typical of present day CCD array formats. These designs are highly suitable for long slit or field spectroscopy and offer the possibility of rapid switching to direct imaging mode.

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