Reflecting telescope with correcting lens

Details Reflecting telescope with correcting lens Reflecting telescope with correcting lens

1981-10-29

1984-10-16

Ponter, William R.

350443, 350556, G02B 2302, G02B 1708

Patent

active

044771568

ABSTRACT:
A reflecting telescope is provided in which a meniscus lens corrects for coma of the primary parabolic reflecting mirror, and also for coma and spherical aberration of an eyepiece, when an eyepiece is used. The meniscus lens may be formed from a plano-concave lens and a plano-convex lens positioned with their planar sides mutually parallel.

REFERENCES:
patent: 3860940 (1975-01-01), Baker
patent: 4350411 (1982-09-01), Rogers
Cox, R. E. "A Ten-Inch Sperical Reflector with a Negative Correcting Lens Sky & Telescope", 10-1962, pp. 231-235.
Berry R. Telescope Making, "New Tonian Telescopes", vol. 9, pp. 6-13, 1980.
Rosin, S., "Ritchey Cretien Corrector System", App. Otics, 1966, pp. 675-676.
Wynne, C. G. "Field Correctors for Large Telescopes", App. Optics, 1965, pp. 1185-1192.
Harmer et al., "A Single-Lens, Small-Field Paraboloid Field Corrector", The Observatory, vol. 96, 12-1976, pp. 239-241.
Rosin, S. "Corrected Cassegrain System", App. Optics, 1964, pp. 151-152.
Maksutov, D. D., "New Catadioptric Meniscus System", Jr. Opt. AM., 1944, pp. 270-284.

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