Electric lamp and discharge devices: systems – With radiant energy sensitive control means – Load device irradiating the radiant energy responsive device
Patent
1997-04-25
1999-04-06
Wong, Don
Electric lamp and discharge devices: systems
With radiant energy sensitive control means
Load device irradiating the radiant energy responsive device
315156, 315158, 250239, H05B 3700
Patent
active
058923306
ABSTRACT:
A light sensor and light feedback adjustment device is provided for use with a control unit for selectively controlling the light output of at least one lamp of a ceiling-mounted luminaire to which the unit is connected, based at least in part on the level of ambient light feedback to the unit. The device includes a lens holder, a lens element screw-mounted on the lens holder and including a light gathering lens, and an arrangement for, in use, securing the lens holder in place in a ceiling tile of the ceiling on which the luminaire is mounted. The lens holder includes a tubular mounting portion including a central bore therein in which is disposed a fiberoptic bundle that receives light gathered by the lens. A light feedback adjustment arrangement includes an adjustable set screw mounted for movement in a transverse passage located in the lens holder between the lens element and the fiber optic bundle so as to vary the light coupled to the bundle.
REFERENCES:
patent: 4568826 (1986-02-01), Pitel et al.
patent: 5404080 (1995-04-01), Quazi
Vu David H.
Wong Don
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