Lighting device with elliptical fresnel mirror

Details Lighting device with elliptical fresnel mirror Lighting device with elliptical fresnel mirror

2007-02-20

2007-02-20

O'Shea, Sandra (Department: 2875)

Illumination

Light source and modifier

Including reflector

C362S285000, C362S341000, C362S355000, C362S362000

Reexamination Certificate

active

10860999

ABSTRACT:
A lighting device has a Fresnel mirror with a reflective surface for reflecting light emitted by a light source onto a target. The reflective surface is defined by an elliptical curve. The light source is disposed at approximately the first focal point of an ellipse formed by the elliptical curve. A mechanism adjusts the functional relationship between the Fresnel mirror and the light source so that the light source can be positioned approximately at the first focal point of the ellipse.

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Fresnel Lenses—Copyright Fresnel Technologies, Inc., 2001, pp. 1-12.
Focal Lenght of a Lens, Aug. 22, 2003, 4 Pgs. www.hyperphysics.phy-ast.gsu.edu.

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