Catadioptric lens system

Details Catadioptric lens system Catadioptric lens system

1976-05-06

1977-12-06

Sacher, Paul A.

350200, 350201, G02B 1708

Patent

active

040614204

ABSTRACT:
The invention provides a highly corrected catadioptric telephoto lens comprising in succession, from the long conjugate end, an aspherized negative meniscus corrector plate, a Mangin type primary mirror which directs light to a secondary mirror comprising the central portion of the second surface of the corrector lens, a first positive meniscus corrector lens and a second biconcave corrector lens. The relative aperture is f/8 and the overall length of the system from first vertex to image plane is less than 0.4 focal length.

REFERENCES:
patent: 2701983 (1955-02-01), Back et al.
patent: 3490831 (1970-01-01), Takahashi

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