Hidden PIR motion detector with mirrored optics
US6346705B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1999 |
| Grant date | Feb 12, 2002 |
| Priority date | — |
| Expiry date | Mar 2, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S250/01
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A motion detector assembly for a decorative lighting fixture that conceals the presence of the motion detector in a decorative element integrated into the design of the lighting fixture and that uses only mirrored optics instead of Fresnel lenses. The motion detector assembly includes a housing having a decorative external appearance harmonious with the style of the lighting fixture and forming an integral part of the lighting fixture. Included within the housing are a mirror assembly and PIR sensor. The mirror assembly includes a number of mirror faces that define a number of monitored zones in the field of view. Each respective mirror face defines an optical path in which radiation admitted through an aperture in the housing from an associated zone is directed to the sensor solely by the respective mirror face without the need for secondary mirrors or auxiliary lenses to complete the optical path. The mirror assembly can provide for two or more vertical levels of view and can provide for a wide angular field of view at one or more of the vertical levels of view. The mirror faces are arranged in tiers, and at least one tier is formed with distal extremities extending forward and l…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.