Device for providing a substantially flat light field

Details Device for providing a substantially flat light field Device for providing a substantially flat light field

1985-02-14

1986-11-18

Corbin, John K.

Illumination

Supported by vehicle structure

Condition responsive

362 31, G02F 100

Patent

active

046232214

ABSTRACT:
A device for providing a substantially flat light field to a light imaging medium includes a transparent disc and an optical system. The surface of the disc is made opaque and light is coupled to the optical system through the edge of the disc by reflection from the internal surface of the disc. The intensity of light passing through the disc to the optical system decreases as the distance from the coupling edge increases. The combined effects of the disc and the optical system result in a substantially flat light field.

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Fundamentals of Optical Engineering by Donald H. Jacobs, McGraw-Hill Book Co., Inc., 1943, pp. 140-141.

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