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
3740119 June 1973 Sakurai et al.
4011857 March 15, 1977 Rice
Foreign Patent Documents
968412 February 1958 DEX
2537547 March 1976 DEX
Other references
  • 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