Optical imaging system for electrophotography

Details Optical imaging system for electrophotography Optical imaging system for electrophotography

1976-12-23

1979-01-02

Moses, Richard L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 30, 355 71, 355 66, G03G 1500

Patent

active

041324773

ABSTRACT:
A converging lens projects a light image of an original document along an optical path onto the surface of a photoconductive drum. A dichroic mirror is disposed in the optical path to reflect the light image and has a reflectance characteristic selected in accordance with the spectral sensitivity characteristic of the drum. Unwanted wavelengths are transmitted through the dichroic mirror and absorbed by an absorption plate. The dichroic mirror and absorption plate are housed in a hermetically sealed casing with the converging lens being fixed to and constituting a portion of the casing.

REFERENCES:
patent: 2229284 (1941-01-01), Fassin
patent: 3143921 (1964-08-01), Russell
patent: 3527974 (1970-09-01), Cooper
patent: 3858976 (1975-01-01), Brooke

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