Optical projection system

Details Optical projection system Optical projection system

1983-01-19

1984-10-02

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Plural

355 50, G03B 2744, G03B 2748, G03B 2750

Patent

active

044744595

ABSTRACT:
An optical projection system of unit magnification for transmitting a real erect image of an object from an object plane to an image plane, comprises a plurality of lenses having parallel optical axes and being arranged in one or more rows. Each lens comprises three or four lens elements arranged along a common optical path extending between the object and image planes, and includes at least two aperture masks which subtend light rays from the axial and off-axis object points in the object plane. These aperture masks are arranged in positions where the image-forming pencil of light rays passing through the lens has a relatively large cross-section.

REFERENCES:
patent: 3584950 (1971-06-01), Gundlach et al.
patent: 3584952 (1971-06-01), Gundlach et al.
patent: 3592542 (1971-07-01), Kaufer et al.
patent: 3605593 (1971-09-01), Anderson
patent: 3655284 (1972-04-01), Agliata
patent: 4168900 (1979-09-01), Adachi
patent: 4173411 (1979-11-01), Massengeil et al.
patent: 4215933 (1980-08-01), Feneberg et al.
patent: 4417809 (1983-11-01), Notzel et al.

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