US PATENT SUBCLASS 250 / 227.29-- .~.~.~ With specific illumination or viewing orientation of light conductor relative to viewed object (e.g., light normal to, and detector at 45 degree angle to, viewed object)

US PATENT SUBCLASS 250 / 227.29
.~.~.~ With specific illumination or viewing orientation of light conductor relative to viewed object (e.g., light normal to, and detector at 45 degree angle to, viewed object)

Current as of: June, 1999
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250 /	HD	RADIANT ENERGY

200	DF	PHOTOCELLS; CIRCUITS AND APPARATUS {11}
216	DF	.~ Optical or pre-photocell system {11}
227.11	DF	.~.~ Light conductor {14}
227.29		.~.~.~ With specific illumination or viewing orientation of light conductor relative to viewed object (e.g., light normal to, and detector at 45 degree angle to, viewed object)

DEFINITION

Classification: 250/227.29

With specific illumination or viewing orientation of light conductor relative to viewed object (e.g., light normal to, and detector at 45 degree angle to, viewed object):

(under subclass 227.11) Subject matter in which the angular relationship of the light source, photodetector means and object being illuminated and detected have a specified geometric relationship.

(1) Note. For example, the photodetector may be placed at 45 degrees to the normal of the illuminated surface, while the optical axis of the light source may be placed perpendicular to the object surface.