Optical system for use in microfilm reading and printing apparat

Details Optical system for use in microfilm reading and printing apparat Optical system for use in microfilm reading and printing apparat

1976-04-14

1977-11-01

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

With focusing or projection screen

353 77, G03B 2732, G03B 2128

Patent

active

040563189

ABSTRACT:
An optical system for use in a microfilm reading and printing apparatus which includes two reflecting mirrors for selective projection of light image from a microfilm onto an observation screen and a printing section within the apparatus. The two reflecting mirrors are driven in such a manner that they direct the image light from the microfilm onto the observation screen during reading, while the first reflecting mirror directs the image light from the microfilm toward the printing section during duplication, with the second reflecting mirror being turned away from the light path between the first mirror and the printing section, thus amount of rotation of the reflecting mirrors, especially of the first reflecting mirror being minimized for effective utilization of the limited space within the apparatus housing.

REFERENCES:
patent: 3183768 (1965-05-01), Rosenburgh et al.
patent: 3264961 (1966-08-01), Tuttle et al.
patent: 3713737 (1973-01-01), Suzuki et al.
patent: 3765759 (1973-10-01), Yamada
patent: 3907418 (1975-09-01), Okuyama

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