Compact light collection system with improved efficiency and reduced size

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Quick Facts

Patent No.: US 6,924,945
App. No.: 10/696,662
Granted: Aug 2, 2005
Kind: B1

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Abstract

A light collection system that includes a light source, a condenser lens, a reflector mechanism to collect and focus light from the light source, an aperture, and an image lens. A light beam from the light source is focused through the aperture to define the image to be projected. Ancillary reflector elements can be positioned to collect light not collected by the reflector means. The result is a compact collection system with a smaller image lens and excellent collection efficiency.

Claims (17)

1. A light collection system comprising:

a light source,

a condenser lens in front of said light source along an optical axis, said condenser lens redirecting light from said light source,

a reflector mechanism to redirect light generated by said light source,

an aperture in front of said condenser lens along the optical axis, said aperture defining an object of said system, and

an image lens in front of said aperture along the optical axis, said image lens defining an image projected by said system; wherein

said reflector mechanism comprises a primary reflector and at least one ancillary reflector element, said primary reflector being behind said light source along the optical axis, and said at least one ancillary reflector element being coincident with or in front of said light source along said optical axis.

2. The light collection system of claim 1 wherein:

said system further comprises a spherical lens that directs light toward said aperture.

3. The light collection system of claim 1 wherein:

said light source comprises a planer filament.

4. The light collection system of claim 1 wherein:

a height of a face of said planar filament is approximately equal to a width of a face of said planar filament.

5. The light collection system of claim 2 wherein:

said light source comprises a planer filament.

6. The light collection system of claim 2 wherein:

a height of a face of said planar filament is approximately equal to a width of a face of said planar filament.

Assignments (5)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 1, 2014