Designing spectrographs for use in the diffraction-limited regime

Details Designing spectrographs for use in the diffraction-limited regime Designing spectrographs for use in the diffraction-limited regime

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997spie.2871.1354b&link_type=abstract

Proc. SPIE Vol. 2871, p. 1354-1358, Optical Telescopes of Today and Tomorrow, Arne L. Ardeberg; Ed.

Physics

Optics

1

Scientific paper

This is an initial survey putting together some facts and ideas relating to a possible generation of new instruments which could dominate optical astronomy. These instruments will be diffraction-limited spectrographs used on diffraction- limited telescopes. They will enable new research, given some new technical development. The slit area is fundamental. Two cases are distinguished -- a full Airy disk within a larger entrance aperture, and an Airy disk which is truncated by a slit. To demonstrate the feasibility of some relevant optical designs, designs are given for two large diffraction-limited spectrograph cameras. Their good imaging properties could enhance exiting spectrographs. Low resolution instruments may use optics of only a few millimeters aperture, leading to the suggestion of using a number of small spectrographs to map the isoplanatic patch at the full spatial resolution of a telescope.

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