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Encyclopedia > Beam splitter

A beam splitter is an optical device, that splits a beam of light in two. It is the crucial part of most interferometers. Prism splitting light Light is electromagnetic radiation with a wavelength that is visible to the eye or, in a technical or scientific setting, electromagnetic radiation of any wavelength. ... Interferometry is the applied science of combining two or more input points of a particular data type, such as optical measurements, to form a greater picture based on the combination of the two sources. ...


In its most common form, it is a cube, made from two triangular glass prisms which are glued together at their base using canada balsam. The thickness of the resin layer is adjusted such that (for a certain wavelength) half of the light incident through one "port" (i.e. face of the cube) is reflected and the other half is transmitted. Polarizing beam splitters, such as the Wollaston prism, use birefringent materials, splitting light into beams of differing polarization. This article needs a complete rewrite for the reasons listed on the talk page. ... Canada balsam, also called canada turpentine or balsam of fir, is a turpentine which is made from the resin of the balsam fir. ... The wavelength is the distance between repeating units of a wave pattern. ... The reflection of sunlight on water Reflection is the abrupt change in direction of a wave front at an interface between two dissimilar media so that the wave front returns into the medium from which it originated. ... The Wollaston prism is an optical device, invented by William Hyde Wollaston, that manipulates polarized light. ... A calcite crystal laid upon a paper with some letters showing the double refraction Birefringence, or double refraction, is the division of a ray of light into two rays (the ordinary ray and the extraordinary ray) when it passes through certain types of material, such as calcite crystals, depending on... This article treats polarization in electrodynamics. ...


Another design is the use of a half-silvered mirror. This is a plate of glass with a thin coating of silver (usually deposited from silver vapour) with the thickness of the silver coating such that, of light incident at a 45 degree angle, one half is transmitted and one half is reflected. Instead of a silver coating, a dielectric optical coating may be used. Similarly, a very thin pellicle film may also be used as a beam splitter. A mirror is a reflective surface that is smooth enough to form an image. ... The materials definition of a glass is a uniform amorphous solid material, usually produced when a suitably viscous molten material cools very rapidly, thereby not giving enough time for a regular crystal lattice to form. ... A coating is a covering, usually liquid, that is put on to protect, or change the appearance of something. ... General Name, Symbol, Number silver, Ag, 47 Chemical series transition metals Group, Period, Block 11, 5, d Appearance lustrous white metal Atomic mass 107. ... Vapor (US English) or vapour (British English) is the gaseous state of matter. ... The electrons in the molecules shift toward the positively charged left plate. ... An optical coating is a thin layer of material placed on an optical component such as a lens or mirror which alters the way in which the optic reflects and transmits light. ... The pellicle is a thick layer supporting the cell membrane in various protozoa, allowing them to retain their shape. ...


A third version of the beam splitter is a dichroic mirrored prism assembly which uses dichroic optical coatings to split the incoming light into three beams, one each of red, green and blue. Such a device was used in multi-tube colour television cameras and also in the 3 film Technicolor movie cameras. A dichroic prism is a prism that splits light into two beams of differing wavelength (colour). ... In optics, the term dichroic has two related but distinct meanings. ... An optical coating is a thin layer of material placed on an optical component such as a lens or mirror which alters the way in which the optic reflects and transmits light. ... Technicolor is the trademark for a series of color film processes pioneered by Technicolor, now a division of Thomson. ...


  Results from FactBites:
 
Beam splitter - Wikipedia, the free encyclopedia (257 words)
A beam splitter is an optical device, that splits a beam of light in two.
Polarizing beam splitters, such as the Wollaston prism, use birefringent materials, splitting light into beams of differing polarization.
A third version of the beam splitter is a dichroic mirrored prism assembly which uses dichroic optical coatings to split the incoming light into three beams, one each of red, green and blue.
United States Patent Application: 0010036083 (2078 words)
The dichroic beam splitter combines light from the first and second solid state light sources by passing light in the first band while reflecting light in the second band to generate light having a spectral content in the first and second bands.
Beam splitter 54 combines the output of arrays 51 and 52 which emit light in spectral bands at cl and c2, respectively.
Beam splitter 54 is chosen such that it reflects light around the spectral maximum of array 52 and transmits light of all other visible wavelengths.
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