US PATENT SUBCLASS 356 / 3.1
.~ Triangulation ranging to a point with two or more projected beams

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

3  DF  RANGE OR REMOTE DISTANCE FINDING {9}
3.1.~ Triangulation ranging to a point with two or more projected beams {2}
3.11  DF  .~.~> Using photodetection at the source station(s)
3.12  DF  .~.~> Using photodetection remote from the source station(s)

DEFINITION

Classification: 356/3.1

Triangulation ranging to a point with two or more projected beams:

(under subclass 3) Subject matter wherein a target distance is determined in accordance with the principles of triangulation, and two light beams, separated by a known baseline distance, are oriented and projected to define the other two legs of the triangle.

(1) Note. The two beams may be scanned over angularly related time across the target or moved at least once to orient their coincidence on the target.

(2) Note. Triangulation involves, for example, establishing a triangle where one side (i.e., the base) and the angles, which the two other sides form with the base, are determined.

(3) Note. This subclass does not necessarily require the use of a photodetector, but requires projected beams.

SEE OR SEARCH THIS CLASS, SUBCLASS:

3.09, where scanning is required to achieve angular measurement to a single point.

3.12+, for photodetection remote from at least two source locations transmitting beams to be received by a photodetector. 9+, for triangulation with no projected beam and no photodetection.

372, for distance measurement to define the dimensions of an adjacent, as opposed to remote, article that may involve triangulation to any one point.

SEE OR SEARCH CLASS

250, Radiant Energy,

201.6, for triangulation used to establish distance-related focus of the source onto a triangulating photodetector.

342, Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation) for the use of similar circuitry not requiring the same wavelength or radiation distinctions.

367, Communications, Electrical: Acoustic Wave Systems and Devices, for the use of similar circuitry not requiring the same wavelength or radiation distinctions.

396, Photography,

89+, where triangulation may be employed in the focus of a separate photos:graphic camera.