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Proceedings Paper

Debris collision warning sensor telescope design
Author(s): Robert J. Brown
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Paper Abstract

The 60-cm diameter, f/2 DCWS telescope is a modified Ritchey Chretein configuration which collects radiation in three spectral bands, 0.4 to 0.9/micron (visible), 5.0 to 9.0/microns (MWIR), and 9.0 to 12.0 microns (LWIR). The visible and infrared radiation are separated by a dichroic beamsplitter and focused on to separate focal planes; the MWIR and LWIR radiation share a common focal plane with separate detector arrays residing side-by-side. The conic constants of the primary and secondary mirrors are that of a Ritchey Chretein telescope; to improve the image quality at the edges of the field of view, a set of zero power correcting optics have been introduced to each optical train. The Ritchey Chretein telescope is corrected to have zero third order spherical aberration and zero third order coma; the DCWS telescope is further configured such that the positive power in the primary mirror is approximately equal to the negative power in the secondary mirror, resulting in a telescope with very little field curvature.

Paper Details

Date Published: 1 December 1991
PDF: 8 pages
Proc. SPIE 1527, Current Developments in Optical Design and Optical Engineering, (1 December 1991); doi: 10.1117/12.48681
Show Author Affiliations
Robert J. Brown, Ball Aerospace Systems Group (United States)

Published in SPIE Proceedings Vol. 1527:
Current Developments in Optical Design and Optical Engineering
Robert E. Fischer; Warren J. Smith, Editor(s)

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