Method for measuring distance and optical distance meter
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United States of America Patent
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Apr 22, 1986
Grant Date -
N/A
app pub date -
Nov 28, 1984
filing date -
Nov 29, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a method of distance measuring and an optical distance measuring apparatus, a pulse-modulated infrared light beam is irradiated to an object to produce a reflected light beam, which is then received by a resonance circuit, and intensity of output of the resonance circuit is measured, wherein the modulation of frequency is sweepingly varied within a predetermined narrow frequency range; thereby, even when the circuit constants of the resonance circuit varies due to temperature change and so on, the distance measurement result is not affected, and stable measurement of a long distance is possible.
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