Reflecting telescope with correcting lens

Details Reflecting telescope with correcting lens Reflecting telescope with correcting lens

1984-10-15

1986-02-18

Punter, William H.

350410, 350442, 350537, G02B 1708, G02B 2306

Patent

active

045710368

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: 2423676 (1947-07-01), Altman
patent: 3014407 (1961-12-01), Altman
patent: 4199217 (1980-04-01), Rogers
patent: 4477156 (1984-10-01), Gebelein
Maksutov, D. D., "New Catadioptric Meniscus Systems", Jr. Optical Soc. America, 5-1944, pp. 270-284.
Harmer et al., "A Single-Lens, Small-Field, Paraboloid Field Corrector", The Observatory, 12-1976, pp. 239-241.

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