Sun exposure monitoring device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 23, 1993
Grant Date -
N/A
app pub date -
Aug 23, 1991
filing date -
Feb 24, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sun monitoring device has a sensing sheet mounted in a housing to receive incident sunlight through a UV pass filter. The sheet contains a dye which luminesces in response to the incident light in a wavelength range within the UV range, and emits light within the sheet at longer wavelengths. The emitted light is internally reflected in the sheet and emerges at the edge of the sheet. A sensor is disposed to receive such light emerging from a portion of the sheet edge and generate signals in response thereto. Computing means is coupled to the sensor to determine from these signals the power of incident UV light on the sensing sheet in the selected wavelength range.
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