US PATENT SUBCLASS 359 / 490
.~.~ By dichroic medium

Current as of: June, 1999
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359 /   HD   OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS

483  DF  POLARIZATION WITHOUT MODULATION {2}
485  DF  .~ Light polarization without any external input {8}
490.~.~ By dichroic medium {2}
491  DF  .~.~.~> Stain or dye
492  DF  .~.~.~> Oriented particles

DEFINITION

Classification: 359/490

By dichroic medium:

(under subclass 485) Subject matter including an optical element which effects the degree of polarization dependent upon the relative absorption therein of the two components or vectors of light.

(1) Note. A dichroic element will transmit light of one color and reflect light of the complementary color with little light being absorbed. These elements are composed of superimposed strata of dielectric material, which are classified in subclass 580.

(2) Note. Included here are elements where the medium comprises a lamination or a coating on a supporting structure and where the supporting structure is significant or the means to form the lamination or coating is significant.

SEE OR SEARCH CLASS

156, Adhesive Bonding and Miscellaneous Chemical Manufacture, appropriate subclasses for processes of adhesively bonding laminae.

427, Coating Processes,

162+, for coating processes, per se, where the product is an optical element.