.~ Photodetection of inclination from level or vertical
DEFINITION
Classification: 356/139.1
Photodetection of inclination from level or vertical:
(under subclass 138) Subject matter that includes the use of photodetection to measure and indicate the angular
orientation of a surface with respect to gravity level or vertical reference.
(1) Note. This subclass includes some reference to gravity level that is used to alter light beam position with respect to a detector to determine and indicate an angle of at least one axis of a plane with respect to level or zenith vertical.
SEE OR SEARCH CLASS
33, Geometrical Instruments,
366.16, for photoelectric detection of attainment of a horizontal level or vertical orientation using a fluid absent significant light modifying structure; subclass 366.23 for photoelectric detection of attainment of a horizontal level or vertical orientation using a solid element absent significant light modifying structure other than gravity responsive structure.
250, Radiant Energy,
206.1+, for alternative outputs of measured coordinates that are not displayed, per se.
