Alignment technique for a photographic enlarger

Details Alignment technique for a photographic enlarger Alignment technique for a photographic enlarger

1991-08-29

1993-08-24

Rutledge, D.

Photocopying

Projection printing and copying cameras

Identifying, composing, or selecting

355 72, 355 77, G03B 2752

Patent

active

052393399

ABSTRACT:
An alignment arrangement for photographic recording apparatus having a lens plane, an object plane, and an image plane. The alignment arrangement comprises an alignment module including a mirror, and luminous indicia disposed in a plane parallel to the mirror's reflective surface. The alignment module may be mounted on the apparatus so that the mirror's reflective surface lies parallel to one of the planes of the apparatus. A second mirror may be placed in another plane of the apparatus so that its reflective surface is parallel to that plane. The alignment module includes a viewing system which allows the two mirrors to be simultaneously viewed. Multiple images of the indicia, created by the two mirrors, may be observed. The images assume only one of many different patterns when the reflective surfaces of the two mirrors are parallel.

REFERENCES:
patent: 2701501 (1955-02-01), Cuny
patent: 3432233 (1969-03-01), Kauffman
patent: 3825938 (1974-07-01), Koch
patent: 4264165 (1981-04-01), Beauviala et al.
patent: 4733257 (1988-03-01), Ziegler
patent: 4951087 (1990-08-01), Ziegler
patent: 5057862 (1991-10-01), Ziegler

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