Illuminating optical device

Details Illuminating optical device Illuminating optical device

1989-03-22

1990-08-07

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250205, 350469, 362268, F21V 708, F21V 1300, G02B 900

Patent

active

049470302

ABSTRACT:
An illuminating optical device including: a light source for emitting a light beam; and an illuminating optical system for receiving the light beam from the light source to irradiate an object with the light beam, the illuminating optical system having an optical axis and an illuminance-distribution changing lens system which is movable in the direction of the optical axis to change an illuminace-distribution forming characteristic of the illuminating optical system.

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patent: 4589769 (1986-05-01), Matsuki
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patent: 4645924 (1987-02-01), Suzuki et al.
patent: 4682885 (1987-07-01), Torigoe
patent: 4683524 (1987-07-01), Ohta
patent: 4717242 (1988-01-01), Echizen et al.

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