US PATENT SUBCLASS 356 / 152.1
.~ With photodetection remote from measured angle

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

138  DF  ANGLE MEASURING OR ANGULAR AXIAL ALIGNMENT {11}
152.1.~ With photodetection remote from measured angle {2}
152.2  DF  .~.~> With reflection of a unidirectional source beam from a planar or nonretroreflective surface
152.3  DF  .~.~> With reflection of a unidirectional source beam from a retroreflector

DEFINITION

Classification: 356/152.1

With photodetection remote from measured angle:

(under subclass 138) Subject matter including photodetection and indication of the apex of an angle or the degree of angular misalignment formed at a location other than at a detecting station.

(1) Note. This subclass would include the degree of misalignment or measure with respect to a given axis of the remote angle of a remote self-luminous source, not found in subclasses 152.2 and 152.3, where the angle apex is not at the detecting station and where there is no automatic following or alignment.

(2) Note. This subclass may include angles at a detecting station which facilitate the measurement of a different remote angle such as in the triangulation of beams or look angles converging on a target.

(3) Note. This subclass does not include shaft angle encoding found elsewhere (see search notes below).

SEE OR SEARCH THIS CLASS, SUBCLASS:

3.01+, for angle determination found in the triangulation of an object's distance.

139.01+, for techniques that may be used in star or sun angle measurements. 139.03, for attitude determination along 3 axes.

139.09, for techniques that may be used in wheel alignment with photodetection.

139.1, for angular inclination, per se.

399+, for parallel alignment of a beam to the detecting station.

SEE OR SEARCH CLASS

250, Radiant Energy,

231.13+, for shaft angle encoding with or without display; subclass 201.6 for angle determination during the triangulation of an object's distance.

359, Optics: Systems (Including Communication) and Elements,

159, for optical communication alignment that does not technically indicate a measurement.

396, Photography,

89+, for the determination of any angle in the triangulation of an object's distance.