(under the class definition) Subject matter wherein a low refractive index sheathing or covering surrounds a higher index of refraction core of an optical fiber, in order to confine light in the core by means of total internal reflection.
(1) Note. The fiber waveguides of this subclass are of generally cylindrical configuration.
(2) Note. Planar type optical waveguides are provided for in subclass 129.
SEE OR SEARCH THIS CLASS, SUBCLASS:
100+, for an optical transmission cable which provides protection to the fibers therein.
115+, for an optical fiber bundle.
SEE OR SEARCH CLASS 65, Glass Manufacturing,
385+, for processes of forming optical fibers or waveguides, particularly subclasses 413+ for processes of depositing a clad by vapor deposition; subclasses 420+ for processes of doping a clad; and subclass 405 for processes of simultaneously forming clad and core.
264, Plastic and Nonmetallic Article Shaping or Treating: Processes,
1.24+, for shaping, treating, or extruding optical fibers, waveguides, or preforms.
428, Stock Material or Miscellaneous Articles,
364+, for fiber stock material.
505, Superconductor Technology: Apparatus, Material, Process, appropriate subclasses for superconductors which could be in optical fiber form.
