Light intensity detection apparatus for a luminous flux with a c

Details Light intensity detection apparatus for a luminous flux with a c Light intensity detection apparatus for a luminous flux with a c

1993-05-26

1995-07-11

Rosenberger, Richard A.

Optics: measuring and testing

Photometers

Photoelectric

236 91C, G01N 2141, G05D 2300

Patent

active

054325994

ABSTRACT:
A temperature control system has a light intensity detection device for providing temperature compensation in accordance with the variation in angle of incident sunlight. The light intensity detection device includes a photoelectric device having a light receiving surface and which produces an electrical output signal in accordance with the intensity of received light. An optical device is disposed between a light source and the light receiving surface. Incident light transmitted through the optical device is re-directed to the light receiving surface by a plurality of prism surfaces disposed on the optical device facing the photoelectric device. The prism surfaces may be concentrically arranged around the optical axis of the photoelectric device. The surface area and angle of orientation of respective prism surfaces are predetermined such that the output electrical signal of the photoelectric device corresponds to a predetermined function in accordance with the thermal energy produced in the vicinity of the light intensity detection device as a function of the angle of incidence of incident light. Thus, the temperature, for example, in an automobile cabin may be precisely and accurately controlled and any variation in thermal energy within the interior of the cabin due to incident light may be compensated for.

REFERENCES:
patent: 4462666 (1984-07-01), Orban
patent: 5255666 (1993-10-01), Curchod

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