.~ Polarizer or special ray transmission (e.g., filter)
DEFINITION
Classification: 313/112
(under subclass 110) Devices in which the optical device is a polarizer, a light filter, or which are provided with an envelope which is designed to be especially transparent to particular wave lengths of radiant energy.
(1) Note. See the class definition for the classification of envelopes including those made of special compositions for electric lamps and discharge devices.
SEE OR SEARCH CLASS
252, Compositions,
299.01+, for liquid crystal containing compositions useful in making optical filters and subclasses 582+ for other compositions useful in making optical filters.
359, Optics: Systems (Including Communication) and Elements,
483+, for light polarizers and subclasses 350+ and 885+ for optical filters. 427, Coating Processes, for processes of coating, per se, wherein the product is an optical element.
428, Stock Material or Miscellaneous Articles,
415, 417 and 426+ for a nonstructural composite web or sheet embodying a layer of glass.
501, Compositions: Ceramic,
11+, for glass compositions capable of filtering light.
