Industry Patents

Patent: 6899451

Optical System for a Fresnel Lens Light, Especially for a Spotlight or Floodlight

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Patent Number:	6899451
Title:	Optical System for a Fresnel Lens Light, Especially for a Spotlight or Floodlight
Abstract:	The optical system for the Fresnel lens light has an ellipsoidal reflector (1), a light source (2) and a Fresnel lens (3). The distance (a) between the Fresnel lens (3) and the reflector (1) is changeable but is related to the changeable distance (b) between the light source (2) and the reflector (1) so that the aperture angle of the propagated light beam is variable but illumination intensity of the propagated light is maintained uniform. Surfaces of the at least one Fresnel lens and/or the reflector can be structured to provide more uniform illumination of a given area. The optical system is useful for lights for film, stage, studio and photography.
Country of Issue:	US
First Named Inventor:	Kittelmann, Wagner
Assignee:	Schott
Continuation or Divisional of:
International Classification:	B60Q 1/08
US Classification:	362/538
Issue Date:	05-31-2005
Filing Date:	03-13-2002
Application :	10/096887
Notes:
Link to Patent at freepatentsonline.com:	6899451 at Freepatentsonline
Link to World Patent Family¹:	World Patent Family at European Patent Office
Link to Google Patents¹:	6899451 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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