US PATENT SUBCLASS 356 / 140
.~ Apex of angle at observing or detecting station

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


356 /   HD   OPTICS: MEASURING AND TESTING

138  DF  ANGLE MEASURING OR ANGULAR AXIAL ALIGNMENT {11}
140.~ Apex of angle at observing or detecting station {6}
141.1  DF  .~.~> With photodetection of reflected beam angle with respect to a unidirectional source beam
141.2  DF  .~.~> With photodetection {3}
142  DF  .~.~> Scale and remote point simultaneously observable {1}
144  DF  .~.~> With plural images {2}
147  DF  .~.~> Measurement in two planes (e.g., azimuth and elevation; hour angle and declination)
148  DF  .~.~> Artificial reference {1}

DEFINITION

Classification: 356/140

(under subclass 138) Subject matter comprising means to furnish a measure of the angle between two optical axes intersecting at a common point at the observing or detecting station and passing through two points remote from this station; or between one such axis and a reference line or plane passing through the station.

(1) Note. Devices which only determine a level line of sight are classified in subclasses 248+ even though, from one point of view, they might be considered as measuring an angle of zero degrees.