Vertical barrier fresnel lens array for infrared motion detector systems
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Description
The single FIGURE is a front elevational view of a vertical barrier fresnel lens array for infrared motion detector systems 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
Other references
| 3740119 | June 1973 | Sakurai et al. |
| 4011857 | March 15, 1977 | Rice |
| 968412 | February 1958 | DEX |
| 2537547 | March 1976 | DEX |
- Corning "Lighting Glassware for Architecture" catalog, .COPYRGT.1963, p. 2, Curved Lens Panel #65.
Patent History
Patent number: D315424
Type: Grant
Filed: Feb 27, 1989
Date of Patent: Mar 12, 1991
Assignee: Fresnel Technologies, Inc. (Fort Worth, TX)
Inventor: Richard N. Claytor (Arlington, TX)
Primary Examiner: Susan J. Lucas
Attorney: James E. Bradley
Application Number: 7/316,435
Type: Grant
Filed: Feb 27, 1989
Date of Patent: Mar 12, 1991
Assignee: Fresnel Technologies, Inc. (Fort Worth, TX)
Inventor: Richard N. Claytor (Arlington, TX)
Primary Examiner: Susan J. Lucas
Attorney: James E. Bradley
Application Number: 7/316,435
Classifications
