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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 15, Iss. 5 — May. 1, 1976
  • pp: 1266–1269

Cassegrain telescopes: limits of secondary movement in secondary focusing

Roger N. Clark  »View Author Affiliations


Applied Optics, Vol. 15, Issue 5, pp. 1266-1269 (1976)
http://dx.doi.org/10.1364/AO.15.001266


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Abstract

The maximum distance to which the secondary mirror can be moved with respect to its primary in a true Cassegrain telescope with limited image deterioration is found to be proportional to the fourth power of the focal ratio of the primary mirror. This limit is independent of all other parameters describing the system when the magnification of the secondary is greater than about 3.

© 1976 Optical Society of America

History
Original Manuscript: June 9, 1975
Published: May 1, 1976

Citation
Roger N. Clark, "Cassegrain telescopes: limits of secondary movement in secondary focusing," Appl. Opt. 15, 1266-1269 (1976)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-15-5-1266


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References

  1. J. W. Foreman, Appl. Opt. 13, 2585 (1974). [CrossRef] [PubMed]
  2. W. B. Wetherell, M. P. Rimmer, Appl. Opt. 11, 2824 (1972). [CrossRef]

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