Source distance adjustment arrangement for uniform illumination

Details Source distance adjustment arrangement for uniform illumination Source distance adjustment arrangement for uniform illumination

1992-04-22

1993-04-06

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

355 68, 356121, G01J 120

Patent

active

052006034

ABSTRACT:
A uniform illumination of the projection surface is obtained by measuring light intensity of a projection surface and adjusting a distance between a light source and an optical element in response to the measured light intensity to optimize brightness and/or distribution.

REFERENCES:
patent: 4746958 (1988-05-01), Yamakawa
patent: 5091744 (1992-02-01), Omata

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