Photographic enlarger apparatus with critical focusing platform

Details Photographic enlarger apparatus with critical focusing platform Photographic enlarger apparatus with critical focusing platform

1985-05-28

1986-11-25

Hayes, Monroe H.

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 72, G03B 2752

Patent

active

046245537

ABSTRACT:
The final focus of a photographic enlarger is carried out by focusing the projected image on a photosensitive medium plane by adjusting the position of the projection lens, and then adjusting the distance of the photosensitive medium from the projection lens to achieve a critical focus.

REFERENCES:
patent: 2369897 (1945-02-01), Hjort
patent: 4084903 (1978-04-01), Pircher
patent: 4473292 (1984-09-01), Mayer

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