Optoelectronic apparatus
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United States of America Patent
Stats
-
Apr 6, 2004
Grant Date -
Feb 14, 2002
app pub date -
Jul 27, 2001
filing date -
Jul 27, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optoelectronic apparatus for detecting objects in a monitored region includes a transmitter that emits transmission light, a receiver that receives a reflected light, and an evaluation unit, in which the transit time t.sub.o of the transmission light that is guided in the monitored region and reflected back, as a reflected light, by an object is evaluated. The transmitter emits the transmission light in the form of a sequence of transmission light pulses. A portion of the light quantity of a transmission light pulse is coupled out as a reference transmission light pulse and guided by way of a reference path to the receiver. The transit time t.sub.R of the reference transmission light pulse guided as a reference reflected light pulse to the receiver is determined in the evaluation unit. The transit-time difference t.sub.o -t.sub.R is used to determine the distance of an object.
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