Photographic projector-printer assembly

Details Photographic projector-printer assembly Photographic projector-printer assembly

1992-04-17

1996-12-24

Gray, David M.

Photocopying

Projection printing and copying cameras

Identifying, composing, or selecting

G03B 2752

Patent

active

055877680

ABSTRACT:
The present invention concerns a photographic projector-printer assembly for projecting a negative film F onto a photographic paper C through a projecting lens L for photographic printing, in which the projecting lens L is integrally provided on its object side with an optical path-splitting prism P for splitting on the optical axis the light for photometric and monitoring purposes, thereby eliminating such a printing ability reduction problem as is found in a system designed to put a reflecting mirror in and out and providing a solution to image distortion and measurement accuracy drop problems. In addition, the optical path-splitting prism P is designed to be adjustable in the optical axis direction and around the optical axis in terms of its position with respect to the projecting lens L, so that the optical axis of the assembly can be kept in alignment with that of an associated photometric and monitoring system.

REFERENCES:
patent: 2257551 (1941-09-01), Griffin et al.
patent: 3333053 (1967-07-01), Back
patent: 3848996 (1974-11-01), Goding

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