Camera with flash exposing device

Details Camera with flash exposing device Camera with flash exposing device

1977-05-23

1979-01-23

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

Illumination systems or details

G03B 2776

Patent

active

041358139

ABSTRACT:
A camera for photosensitive material used in producing half tones wherein a device for flash exposing the image to create better half tones is afforded by the use of a low wattage lamp projecting light along the optical path of the lens from the shutter, through a screen and onto the film plane for the photosensitive materials. The light is so directed by a specular reflective surface on the back of the shutter and a lamp off axis directing light to the reflective surface. Timing for the flash exposure is provided by commercial circuitry.

REFERENCES:
patent: 2621569 (1952-12-01), Glassey
patent: 2705907 (1955-04-01), Caps et al.
patent: 3040640 (1962-06-01), Abel et al.
patent: 3249000 (1966-05-01), Pack
patent: 3619055 (1971-11-01), Archer et al.

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