Physics – Optics
Scientific paper
Jan 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979spie..183..207c&link_type=abstract
In: Space optics; Proceedings of the Seminar, Huntsville, Ala., May 22-24, 1979. (A80-17432 05-89) Bellingham, Wash., Society of
Physics
Optics
1
Anastigmatism, Mirrors, Optical Properties, Telescopes, Foci, Image Resolution, Optical Correction Procedure, Visual Fields
Scientific paper
A new variation on an older optical form, the three-mirror anastigmat, has been designed. Using the form off-axis in both aperture and field allows for an unobscured system that can be packaged in a small volume without any auxiliary folding mirrors. Significant extensions in speed and in field of view have been made. Two examples are shown, a 3 deg x 6 deg field of view, f/2.6 design with 0.17 mrad resolution, and a 0.5 deg x 10 deg field of view f/3.0 design with approximately 0.10-mrad resolution. Both designs have flat focal surfaces and good shielding from stray radiation. The performance of these two systems has been enhanced by tilting and decentering the mirrors by small amounts during the final optimization stages. This technique, which makes it possible to put the conic surfaces to the best optical use, is applicable because of the off-axis nature of the design.
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