04333723 is referenced by 3 patents and cites 8 patents.

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 a 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. An optical element is positioned above the lamp to prevent direct light from striking the platen and, in a preferred embodiment, has an aperture therein for increasing illumination of the platen area overlying the lamp-blocker mounting.

Title
Full frame flash illumination system utilizing a diffuse integrating optical cavity
Application Number
15557
Publication Number
4333723
Application Date
January 23, 1980
Publication Date
June 8, 1982
Inventor
John A Durbin
Webster
NY, US
Stephen T Avery
Rochester
NY, US
George R Simpson
Rochester
NY, US
Frederick A Green
Fairport
NY, US
Assignee
Xerox Corporation
CT, US
IPC
G03B 27/72
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