Scanning system for document reproduction device

Details Scanning system for document reproduction device Scanning system for document reproduction device

1981-06-15

1983-06-07

Braun, Fred L.

Photocopying

Including fiber optics

355 11, 355 51, 355 57, G03G 1504, G03G 1528

Patent

active

043868436

ABSTRACT:
An optical system for scanning a document in an object plane includes a pivoting mirror and a projection lens which projects an image onto the surface of a photoreceptor. By rotating and translating the projection lens while simultaneously moving an aperture slit in a direction of movement opposite to the movement of the photoreceptor, a condition is constantly maintained wherein the object plane, lens plane and image plane are maintained parallel thereby eliminating field tilt. With this configuration, the image is also precessed onto the photoreceptor providing a precession distance which can be used to relax constraints normally imposed by scan return conditions. In a specific embodiment, a double reflector arrangement on the image side of the projection lens is used to maintain total system conjugate.

REFERENCES:
patent: 3454335 (1969-07-01), Caldwell et al.
patent: 3709602 (1973-01-01), Satomi
patent: 4232960 (1980-11-01), Glab
patent: 4293184 (1981-10-01), Minoura et al.

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