Light exposure device including specular reflective and light-di

Details Light exposure device including specular reflective and light-di Light exposure device including specular reflective and light-di

1978-04-05

1979-09-18

Griffin, Donald A.

Photocopying

Contact printing

Light boxes

G03B 2704

Patent

active

041681223

ABSTRACT:
A light exposure device including an open-ended housing with trapezoidal side walls and a rectangular top wall contiguous therewith. The internal surface of the top wall and major portions of the internal surfaces of the side walls are light-diffusing while the remaining portions of the side wall internal surfaces are specular reflective. These surfaces are arranged such that the reflective surfaces direct light from the device's light source to the diffusing surfaces whereby only the diffused light passes through the housing's open end. A portable copier which utilizes the above device is also described.

REFERENCES:
patent: 767571 (1904-08-01), Lande
patent: 2813456 (1957-11-01), Ostrov
patent: 3270194 (1966-08-01), Pui Kum Lee
patent: 3498714 (1970-03-01), Elmer
patent: 3715156 (1973-02-01), Levy
patent: 3737226 (1973-06-01), Shank
patent: 4050808 (1977-09-01), Gyori et al.

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