Industry Patents
Patent: 6123436
Optical Device for Modifying the Angular and Spatial Distribution of Illuminating Energy
(Click image for PDF of full patent)
| Patent Number: |
6123436 |
| Title: |
Optical Device for Modifying the Angular and Spatial Distribution of Illuminating Energy |
| Abstract: |
A deconcentrating optic has an input aperture positioned near a point of
minimum focus of a reflector, and has an output aperture which is larger
than the input aperture. An inner surface connects the two apertures of
the optic. The surface is reflective to visible light, and is shaped to
decrease the angles of incident light rays from the reflector so that an
emerging light beam is bounded by a cone the angle of which is less than
or equal to the acceptance cone of a projection lens. The size and shape
of the output beam is such that the object lying in the projection plane
of the lens is fully illuminated but not overfilled. The inner surface of
the reflecting optic may be selectively perturbed so that the object plane
of the projection lens is uniformly illuminated. The general shape of the
reflecting optic's inner surface may be parabolic, elliptical, hyperbolic,
circular, conical, or combinations of these shapes. The perturbations of
the inner surface may be protrusions on or indentations in the inner
surface, and may have shapes that are circular, planar, triangular,
parabolic, random, or any other shape. A solid deconcentrating optic is
transparent throughout, having a reflective coating on its exterior
surface except for an input and an output aperture surface, which may be
curved to cooperate with reflections from the reflective coating on the
exterior surface to produce the desired output irradiance distribution.
|
| Country of Issue: |
US |
| First Named Inventor: |
Hough, Bormhorst |
| Assignee: |
Vari-Lite |
| Continuation or Divisional of: |
|
| International Classification: |
F21V 7/00 |
| US Classification: |
362/296 |
| Issue Date: |
09-26-2000 |
| Filing Date: |
08-05-1997 |
| Application : |
08906523 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
6123436 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
6123436 at Google Patents |
1. The Google Patents and World Patent Family links will likely not work until a few weeks
after the patent has issued - they take a while to get new patents in their systems.
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