US PATENT SUBCLASS 250 / 559.16
.~.~ Detection of diffuse light


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

200  DF  PHOTOCELLS; CIRCUITS AND APPARATUS {11}
559.01  DF  .~ With circuit for evaluating a web, strand, strip, or sheet {13}
559.16.~.~ Detection of diffuse light {2}
559.17  DF  .~.~.~> With diffusion optics
559.18  DF  .~.~.~> With discrimination of discrete light diffusing region


DEFINITION

Classification: 250/559.16

Detection of diffuse light:

(under subclass 559.01) Subject matter wherein detection means are arranged to receive non-specularly reflected light from the material (i.e., the angle of the light reflected from the material is not equal to the angle of the light incident to the material).

SEE OR SEARCH CLASS

356, Optics: Measuring and Testing,

446, for optical measuring with diffusion of reflected light.