Extra wide fresnel lens array for infrared motion detector
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Description
The single FIGURE is a front elevational view of an extra wide angle 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
Foreign 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. |
968412 | February 1958 | DEX |
2173013A | October 1986 | GBX |
Patent History
Patent number: D331120
Type: Grant
Filed: Aug 16, 1991
Date of Patent: Nov 17, 1992
Assignee: Fresnel Technologies, Inc. (Fort Worth, TX)
Inventor: Richard N. Claytor (Arlington, TX)
Primary Examiner: Susan J. Lucas
Attorney: James E. Bradley
Application Number: 7/746,326
Type: Grant
Filed: Aug 16, 1991
Date of Patent: Nov 17, 1992
Assignee: Fresnel Technologies, Inc. (Fort Worth, TX)
Inventor: Richard N. Claytor (Arlington, TX)
Primary Examiner: Susan J. Lucas
Attorney: James E. Bradley
Application Number: 7/746,326
Classifications