Long range fresnel lens array for infrared motion detector

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Description

The single FIGURE is a front elevational view of a long range fresnel lens array for infrared motion detector showing my new design, the lens array being a flat, rectangular, thin sheet having a front surface with grooves thereon and a plain, smooth, rear surface with no ornamentation.

Referenced Cited
U.S. Patent Documents
D315422 March 12, 1991 Claytor et al.
D315423 March 12, 1991 Claytor et al.
D315424 March 12, 1991 Claytor
D315425 March 12, 1991 Claytor et al.
D315806 March 26, 1991 Claytor et al.
D315807 March 26, 1991 Claytor et al.
D315808 March 26, 1991 Claytor et al.
D315966 April 2, 1991 Claytor et al.
Foreign Patent Documents
968412 February 1958 DEX
2173013A October 1986 GBX
Patent History
Patent number: D341902
Type: Grant
Filed: Jan 24, 1991
Date of Patent: Nov 30, 1993
Assignee: Fresnel Technologies, Inc. (Ft. Worth, TX)
Inventor: Richard N. Claytor (Arlington, TX)
Primary Examiner: Susan J. Lucas
Attorney: James E. Bradley
Application Number: 7/645,276