Shading member of rotator type optical sensing device
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United States of America Patent
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Apr 23, 2013
Grant Date -
Aug 11, 2011
app pub date -
Apr 9, 2010
filing date -
Feb 11, 2010
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical sensing device includes a shell, at least one light emitting member, a rotator type shading member and at least one optical sensing member. The shell is formed with a black-body condition space having a light emitting chamber, a shading chamber and at least one optical sensing chamber. The light emitting member projects a light beam. The rotator type shading member is rotatably restrained within the shading chamber, and has a geometric center and a weight center offset from the geometric center. When the optical sensing device is lifted in a lifting azimuth or lowered in a lowering azimuth, the rotator type shading member is rotated by the geometric center to make the weight center located in the lowering azimuth with respect to the geometric center. The optical sensing member is arranged in the optical sensing chamber, and senses the light beam to accordingly send out a sensing signal.
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