US PATENT SUBCLASS 359 / 494
.~.~ By birefringent element

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


359 /   HD   OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS

483  DF  POLARIZATION WITHOUT MODULATION {2}
485  DF  .~ Light polarization without any external input {8}
494.~.~ By birefringent element {4}
495  DF  .~.~.~> For beam deflection or splitting
496  DF  .~.~.~> Prisms
497  DF  .~.~.~> Using plural elements {2}
500  DF  .~.~.~> With particular material or mounting structure

DEFINITION

Classification: 359/494

By birefringent element:

(under subclass 485) Subject matter including an element having the property of dividing a ray or beam of energy into two polarized rays or beams (known as the ordinary and extraordinary rays), the directions of polarization being at right angles to each other.

(1) Note. A birefringent material which has been treated with a dichroic dye to absorb the ordinary or extraordinary ray is no longer considered to be birefringent within the meaning of this definition. A birefringent element in the form of a Nicol prism where the unwanted ray is deflected is classified here.