Telescope baffle performance for Lyman Far Ultraviolet Spectrographic Explorer

Details Telescope baffle performance for Lyman Far Ultraviolet Spectrographic Explorer Telescope baffle performance for Lyman Far Ultraviolet Spectrographic Explorer

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apopt..32.3570m&link_type=abstract

Applied Optics (ISSN 0003-6935), vol. 32, no. 19, p. 3570-3584.

Physics

Optics

3

Fresnel Diffraction, Incidence, Optical Equipment, Ultraviolet Telescopes, Computer Programs, Mirrors, Software Tools

Scientific paper

The Lyman Far Ultraviolet Spectrographic Explorer telescope is a Wolter type II glancing incidence design with an aperture of 64 cm. Because the spacecraft is required to guide on stars fainter than m(v) = 16, a visible light baffle is necessary to protect the FOV from the stray light that results from out-of-field bright sources. Such a baffle system is described here. Total point-source transmittances are computed for incident beams in the range 0-70 deg. Estimates for background brightness on the detector are made for the contribution from direct sunlight and earthshine. Scattering from the black surfaces of the baffle, the vanes, and diffraction at the structure's edges are taken into consideration.

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