Illumination system

Details Illumination system Illumination system

1990-06-29

1996-09-10

Shafer, Ricky D.

Optical: systems and elements

Mirror

Plural mirrors or reflecting surfaces

359857, 359858, 362298, 362346, G02B 508, G02B 510, F21V 700

Patent

active

055551351

ABSTRACT:
An illumination system for illuminating a surface includes a reflecting element having a finite focal length. A light source is located at a point, close to a focal point of the reflecting element, which is deviated from the principal axis of the reflecting element. Light from the light source is reflected by the reflecting element, whereby light with parallel rays is directed toward the surface. The surface is illuminated with symmetrical illuminance distribution with respect to the optical axis of the light.

REFERENCES:
patent: 3697154 (1972-10-01), Johnson
patent: 4037943 (1977-07-01), Anzai
patent: 4205902 (1980-06-01), Shafer
patent: 4577959 (1986-03-01), Yazaki
patent: 4634276 (1987-01-01), Sharpe
patent: 4639127 (1987-01-01), Beery et al.
patent: 4643545 (1987-02-01), Vanderwall
patent: 4747030 (1988-05-01), Offner et al.
patent: 4762411 (1988-08-01), Pitalo et al.
patent: 4773756 (1988-09-01), Blechinger
patent: 4974138 (1990-11-01), Negishi
patent: 5005959 (1991-04-01), Nagata et al.
Walter G. Driscoll, Handbook of Optics, pp. 2-3 to 2-6, USA.

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