US PATENT SUBCLASS 356 / 141.2
.~.~ With photodetection

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

138  DF  ANGLE MEASURING OR ANGULAR AXIAL ALIGNMENT {11}
140  DF  .~ Apex of angle at observing or detecting station {6}
141.2.~.~ With photodetection {3}
141.3  DF  .~.~.~> With unidirectional or planar source beam directed at the photodetecting station
141.4  DF  .~.~.~> With optical scanning of light beam or detector
141.5  DF  .~.~.~> With at least 2-dimensional sensitivity

DEFINITION

Classification: 356/141.2

With photodetection:

(under subclass 140) Subject matter that includes photodetection for measuring and indicating the angle to a luminous object (e.g., beacon, missile, ambiently illuminated object) not found in subclass 141.1 above.

(1) Note. The luminous radiation from the object is considered to be radial.

(2) Note. Shaft angle encoding with or without indication claimed or shown is found in Class 250, subclasses 231.13+.

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 measuring attitude characteristics along 3 axes. 139.04+, for the same concepts plus automatic following.

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

139.1, for specifically measuring angle of inclination.

152.1, for measuring and indicating any angle other than that at 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; subclasses 206.1+ for alternative outputs that do not include any display, per se; subclass 342 for determining the location of an IR (infrared) source that may include angle information.

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.