Optical system for microfilm

Details Optical system for microfilm Optical system for microfilm

1981-05-21

1984-08-07

Corbin, John K.

G02B 960

Patent

active

044640242

ABSTRACT:
An optical system for microfilm having an image rotating prism in the vicinity of the end at the image enlarging side of a wide-angle microfilm lens, and having an entrance pupil close to the lens end, thus allowing proper image projection onto the image plane from a microfilm displaced in rotation from a proper position.

REFERENCES:
patent: 2405729 (1946-08-01), Altman
patent: 2441036 (1948-05-01), Schade
patent: 2989895 (1961-06-01), Sandback
patent: 3482901 (1969-12-01), Melech
patent: 3536381 (1970-10-01), Pituley
patent: 3867018 (1975-02-01), Shoemaker

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