Industry Patents

Patent: 5975720

Color Changer

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Patent Number:	5975720
Title:	Color Changer
Abstract:	A color changer for use with a wide angle light source which includes a frame, a plurality of planar dichroic filter strips mounted on the frame and aligned substantially parallel to each other. The filter strips have identical predetermined optical filtering characteristics with first and second sets of the filter strips movable along a common axis so as to vary the gap between them and at least alternate ones of the filter strips in each of the first and second sets set at an angle such that, when the color changer is positioned in a beam of light transmitted from the wide angle light source, a substantially constant angle of incidence is maintained with respect to light from the light source incident on the alternate ones of the dichroic filter strips.
Country of Issue:	US
First Named Inventor:	Adkins
Assignee:	Ricardo Lighting Company
Continuation or Divisional of:
International Classification:	F21V 9/00
US Classification:	362/293
Issue Date:	11-02-1999
Filing Date:	09-29-1997
Application :	08/939386
Notes:
Link to Patent at freepatentsonline.com:	5975720 at Freepatentsonline
Link to World Patent Family¹:	World Patent Family at European Patent Office
Link to Google Patents¹:	5975720 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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