Illumination system for a photographic copying apparatus

Details Illumination system for a photographic copying apparatus Illumination system for a photographic copying apparatus

1977-07-06

1979-01-02

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

Illumination systems or details

355 70, G03B 2754, G03B 2776

Patent

active

041324781

ABSTRACT:
A light-diffuser for a photographic copier such as an enlarger incorporates a closely contacting parallel row of elongated glass rods held between a pair of tracks. The rods are preferably of heat-resistant glass of round cross section. An additional row of such rods may be disposed parallel to the first row and staggered therefrom to improve the diffusion of a beam of light passing through them.

REFERENCES:
patent: 3217594 (1965-11-01), Simmon
patent: 3227044 (1966-01-01), Hunt et al.
patent: 3630609 (1971-12-01), Clapp et al.
patent: 3756712 (1973-09-01), Weisglass et al.
patent: 3923394 (1975-12-01), Frankiewicz

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