Polarizer

For the photographic filter, see Polarizing filter (photography).
A polarizing filter cuts down the reflections (top) and makes it possible to see a photographer through the glass at roughly Brewster's angle although reflections off the back window of the car are not cut because they are less-strongly polarized, according to the Fresnel equations.

A polarizer or polariser is an optical filter that lets light waves of a specific polarization pass through while blocking light waves of other polarizations.[1][2][3][4] It can filter a beam of light of undefined or mixed polarization into a beam of well-defined polarization, known as polarized light. Polarizers are used in many optical techniques and instruments. Polarizers find applications in photography and LCD technology. In photography, a polarizing filter can be used to filter out reflections.

The common types of polarizers are linear polarizers and circular polarizers. Polarizers can also be made for other types of electromagnetic waves besides visible light, such as radio waves, microwaves, and X-rays.

  1. ^ Wolf, Mark J. P. (2008). The Video Game Explosion: A History from PONG to Playstation and Beyond. ABC-CLIO. p. 315. ISBN 978-0313338687.
  2. ^ Johnsen, Sönke (2012). The Optics of Life: A Biologist's Guide to Light in Nature. Princeton Univ. Press. pp. 207–208. ISBN 978-0691139913.
  3. ^ Basu, Dipak (2000). Dictionary of Pure and Applied Physics. CRC Press. pp. 142–143. ISBN 1420050222.
  4. ^ Gåsvik, Kjell J. (2003). Optical Metrology (3rd ed.). John Wiley and Sons. pp. 219–221. ISBN 0470846704.