Illumination – Self powered lamp – With movable focusing element
Patent
1984-03-08
1985-07-16
Walsh, Donald P.
Illumination
Self powered lamp
With movable focusing element
362268, 362285, 362308, 362311, 362328, F21L 1100
Patent
active
045300402
ABSTRACT:
An improved optical focusing system is provided which includes a parabolic reflector and a fresnel lens situated with respect to one another to share a common focus point. The improved system is designed to collimate substantially all of the available light emitted from a light source located at the common focus point and project the light along a projecting axis. Depending on the limitations placed upon the size of the parabolic reflector, a retroreflector situated about the periphery of the fresnel lens can be added to the system to maximize the amount of emitted light which the system can process and collimate.
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Rayovac Corporation
Walsh Donald P.
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