polarizer
Sign in to savethumb|right|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.]]
Article
17 sectionsContents
- Linear polarizers
- Absorptive polarizers
- Beam-splitting polarizers
- Polarization by Fresnel reflection
- Birefringent polarizers
- Thin film polarizers
- Wire-grid polarizers
- Malus's law and other properties
- Circular polarizers
- Creating circularly polarized light
- Absorbing and passing circularly polarized light
- Homogeneous circular polarizer
- Circular and linear polarizing filters for photography
- See also
- References
- Further reading
- External links
thumb|right|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. 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.