7MM Ultrafiche lens

Details 7MM Ultrafiche lens 7MM Ultrafiche lens

1975-09-29

1976-12-21

Corbin, John K.

350214, G02B 964

Patent

active

039985288

ABSTRACT:
This invention relates to a short focal length, large aperture, high resolution optical system for efficiently transmitting a microfiche image to a viewing surface at an unusually high magnification ratio with an extraordinarily high degree of correction over a prescribed field.

REFERENCES:
patent: 3759606 (1973-09-01), Van Orden

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