Distance measuring device and method for adjusting photodetection unit of distance measuring device
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United States of America Patent
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Feb 17, 2004
Grant Date -
Jun 7, 2001
app pub date -
Nov 29, 2000
filing date -
Dec 7, 1999
priority date (Note) -
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Abstract
The present invention provides a distance measuring device for measuring a distance, comprising a light emitting unit for emitting a measuring light beam toward an object to be measured, and a photodetection unit for receiving a reflected measuring light beam reflected from the object to be measured, wherein said distance measuring device comprises a gain control unit for changing photodetection sensitivity of said photodetection unit by a bias voltage and a light amount switching unit for variably changing a light amount of the light emitting element which emits the light beam toward the photodetection unit.
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