US PATENT SUBCLASS 356 / 5.1
.~.~ Of CW phase delay

Current as of: June, 1999
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356 /   HD   OPTICS: MEASURING AND TESTING

3  DF  RANGE OR REMOTE DISTANCE FINDING {9}
4.01  DF  .~ With photodetection {11}
5.1.~.~ Of CW phase delay {4}
5.11  DF  .~.~.~> Having multiple carrier or modulation frequencies {1}
5.13  DF  .~.~.~> Having an alternating reference path
5.14  DF  .~.~.~> Having polarization discrimination
5.15  DF  .~.~.~> Having specific IF mixing of returns

DEFINITION

Classification: 356/5.1

Of CW phase delay:

(under subclass 4.01) Subject matter that incorporates a continuous wave (CW) of modulated or unmodulated optical signal that is transmitted to and reflected from a target, such that the relative phase position of the returned wave is compared to the phase of the transmitted wave in order to determine the distance-proportional transit time to and from the target.

(1) Note. Phase nulling techniques are included in this subclass.