Full frame flash illumination system utilizing a diffuse integra

Details Full frame flash illumination system utilizing a diffuse integra Full frame flash illumination system utilizing a diffuse integra

1979-02-26

1981-02-10

Lechert, Jr., Stephen J.

Illumination

Display backlight

Lcd backlight

362263, 355 67, G09F 1304

Patent

active

042505380

ABSTRACT:
An illumination system for a document copying machine including an optical cavity having interior walls coated with a white, diffusely reflecting material. One end of the cavity contains a platen for positioning document to be copied while the opposing end contains a lens for forming an image of the document on a light sensitive image plane. Illumination from a single flash illumination source located within the cavity, undergoes multiple reflections from the walls resulting in a uniform diffuse illumination of the document.

REFERENCES:
patent: 4071882 (1978-01-01), Dennis

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