Cassegrain telescopes - Limits of secondary movement in secondary focusing

Details Cassegrain telescopes - Limits of secondary movement in secondary focusing Cassegrain telescopes - Limits of secondary movement in secondary focusing

May 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apopt..15.1266c&link_type=abstract

Applied Optics, vol. 15, May 1976, p. 1266-1269.

Physics

Optics

2

Cassegrain Optics, Focusing, Ray Tracing, Reflecting Telescopes, Mirrors, Optical Properties

Scientific paper

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.

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