US PATENT SUBCLASS 250 / 227.18
.~.~.~.~ Causing light spectral frequency/wavelength change

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}
227.14  DF  .~.~.~ Condition responsive light guide (e.g., light guide is physically affected by parameter sensed which results in light conveyed to the photocell) {5}
227.18.~.~.~.~ Causing light spectral frequency/wavelength change

DEFINITION

Classification: 250/227.18

Causing light spectral frequency/wavelength change:

(under subclass 227.14) Subject matter in which the condition sensed causes a change in frequency/wavelength of the light transmitted to the photodetector by the light conductor.

(1) Note. The photocell may, for example, detect changes in the frequency of the light transmitted to it by the light conductor due to changes in the elongation of the light conductor.

(2) Note. This subclass provides for significant light conductor means in detecting color whereas subclass 226, is directed to color detection broadly.

SEE OR SEARCH THIS CLASS, SUBCLASS:

226, color (e.g., filter or spectroscope), for related subject matter that may or may not include light conductors.

SEE OR SEARCH CLASS

209, Classifying, Separating, and Assorting Solids, 580+, for sorting articles based on their color.

356, Optics: Measuring and Testing,

402+, measuring and testing color of an object; subclasses 300+ for measuring and testing by dispersed light spectroscopy.

436, Chemistry: Analytical and Immunological Testing,

164+, optical result, including subclass 171, optical spectrum, where the test and the result involves a chemical reaction.

702, Data Processing: Measuring, Calibrating, or Testing, appropriate subclasses.