Extra wide angle 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: D331126
Type: Grant
Filed: Aug 16, 1991
Date of Patent: Nov 17, 1992
Assignee: Fresnel Technologies, Inc. (Ft. Worth, TX)
Inventor: Richard N. Claytor (Arlington, TX)
Primary Examiner: Susan J. Lucas
Attorney: James E. Bradley
Application Number: 7/747,207
Type: Grant
Filed: Aug 16, 1991
Date of Patent: Nov 17, 1992
Assignee: Fresnel Technologies, Inc. (Ft. Worth, TX)
Inventor: Richard N. Claytor (Arlington, TX)
Primary Examiner: Susan J. Lucas
Attorney: James E. Bradley
Application Number: 7/747,207
Classifications
Current U.S. Class:
With Refractive Rib Or Groove, E.g., Prismatic, Etc. (D26/122)
