Stray light control in an optical system

Details Stray light control in an optical system Stray light control in an optical system

1977-11-14

1978-08-15

Sacher, Paul A.

G02B 1708

Patent

active

041068564

ABSTRACT:
In an optical system having a mirror system for reflecting light from a field of interest to form a desired image on sensitive material disposed in a focal plane, the improvement characterized by the provision of a centrally located obscuration disposed adjacent the front of a mirror for intercepting light reflected from the sensitive material toward the mirror to prevent reflection from the mirror of said light reflected from the sensitive material from reilluminating the sensitive material, to thereby improve the contrast the desired image.

REFERENCES:
patent: 2409971 (1946-10-01), Bennett
patent: 2726574 (1955-12-01), Mandler

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