Distance measuring apparatus

Details Distance measuring apparatus Distance measuring apparatus

2011-03-01

2011-03-01

Tarcza, Thomas H (Department: 3662)

Optics: measuring and testing

Range or remote distance finding

With photodetection

Reexamination Certificate

active

07898647

ABSTRACT:
A distance measuring apparatus, which can achieve reduction in cost and size and perform measurement ranging from short-distance to long-distance accurately, includes an unit outputting first pulsed light L1to a measurement object, an unit detecting first pulsed light L2reflected by the measurement object to output a signal responsive to an intensity variation thereof, a measuring unit measuring a time difference between output and detection of the first pulsed light during a period when an intensity of the signal is larger than a predetermined value, a measuring unit measuring the time difference at a time when an intensity of the signal varies from less than a predetermined value to the predetermined value or more, and an unit calculating a distance to the measurement object using a time difference measured by at least one of the two measuring units.

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Notification of the First Office Action issued in Chinese Patent Application No. 200680024253.6; May 10, 2010; with English-language translation.

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