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Topic: Prism (optics)

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  Prism (optics) - Wikipedia, the free encyclopedia
In optics, a prism is a device used to refract light, reflect it or break it up (to disperse it) into its constituent spectral colours (colours of the rainbow).
The traditional geometrical shape is that of a triangular prism, with a triangular base and rectangular sides.
Dispersive prisms are used to break up light into its constituent spectral colours because the refractive index depends on frequency (see dispersion); the white light entering the prism is a mixture of different frequencies, each of which gets bent slightly differently.
en.wikipedia.org /wiki/Prism_(optics)   (333 words)

 prism (optics)
A prism (a triangular block of transparent material such as plastic, glass, or silica) is used to split a ray of white light into its spectral colours.
In optics, a triangular block of transparent material (plastic, glass, or silica) commonly used to ‘bend’ a ray of light or split a light beam (for example, white light) into its component colours.
The dispersive property of prisms is used in the spectroscope.
www.tiscali.co.uk /reference/encyclopaedia/hutchinson/m0016637.html   (153 words)

 Learn more about Prism (optics) in the online encyclopedia.   (Site not responding. Last check: 2007-10-20)
In optics, a prism is a device used to reflect light or to break it up (to disperse it) into its constituent spectral colors (colors of the rainbow), traditionally built in the shape of a right prism with triangular base.
Prisms are used to reflect light, for instance in binoculars, since they are easier to manufacture than mirrors.
Prisms can also be used to break up light into its constituent spectral colors because the refractive index depends on frequency (see dispersion); the white light entering the prism is a mixture of different frequencies, each of which gets bent slightly differently.
www.onlineencyclopedia.org /p/pr/prism__optics_.html   (333 words)

The prism is cut from a block and has a cylindrical cavity connected to an opening closed by a tap polished with emery.
The two prisms, the crown one, with a 15 degrees 15 minutes angle, the other in flint, with a 8 degrees 6 minutes, both calculated on the basis of the glass quality that is used.
Between the two instruments we have the prism covered by a cylindrical container with two windows in correspondence of the collimator and of the telescope.
spazioinwind.libero.it /gabinetto_di_fisica/ottica/optics4.htm   (896 words)

 Basic Prism Optics
In the prism with straight sides shown here all of the rays that are travelling parallel to the first ray are deviated the same amount, so they emerge parallel to each other.
There is no place on the prism where the thickness is greater than at that one area of the edge [provided your prism has no power].
Hold the prism an inch away from a piece of paper with the thickest part to the left and the thinnest part to the right.
www.nfos.org /degree/opt11/module_12a.html   (945 words)

A refracting prism is a convenient geometry to illustrate dispersion and the use of the angle of minimum deviation provides a good way to measure the index of refraction of a material.
Reflecting prisms are used for erecting or otherwise changing the orientation of an image and make use of total internal reflection instead of refraction.
The angle of minimum deviation for a prism may be calculated from the prism equation.
hyperphysics.phy-astr.gsu.edu /hbase/geoopt/prism.html   (284 words)

 Prism Fiber Optics - Standard Signs
Fiber Optics are unique in their ability to continuously change color resulting in recognizable high profile displays.
Fiber optics are strands of plastic or glass, which transmit light from one end to the other with minimal loss of intensity.
Prism Fiber Optics applies a patented faceplate process to overcome this viewing limitation providing the viewer a 175° veiwing angle enabling the fiber light points to be seen from angles as extreme as 3° degrees.
www.prismfiberoptics.com /html/info.html   (498 words)

 Prism Diet -- Recommendations and Resources   (Site not responding. Last check: 2007-10-20)
In optics, a prism is a device used to refract light, reflect it or break it up (to disperse it) into its constituent spectral colours (colours of the rainbow), traditionally built in the shape of a right prism with triangular base.
A prism with at least one rectangular face has all faces rectangular, and is called a ''rectangular prism''; a rectangular prism with a square face has two opposite square faces, and is called a ''square prism''.
The prism is designed such that one particular wavelength of the light exits the prism at a deviation angle (relative to the light's original path) of exactly 60°.
www.becomingapediatrician.com /health/121/prism-diet.html   (1426 words)

 Optical fingerprinting system - Patent 4792226
When the surface of the prism on which the finger is inserted is grooved as illustrated in the McMahon patent, horizontal scale errors which are distance distortions on the fingerprint image from true distances along a X-axis generally perpendicular to the longitudinal axis of the finger on the fingerprint, are also inherent.
Prisms 20A-20D are spaced from one another by triangular shaped mirror blocks 40 which have reflective or mirror side surfaces 41 which angle away from side surfaces 112 of prisms 20A-20D and intersect at a point toward slap/finger image selection optics 26.
Finger prism trolley 24 is mounted with respect to unit 12 at an angle in such a manner that finger-receiving grooves 102 of prisms 20A-20D are generally parallel with top panel 50 of the unit.
www.freepatentsonline.com /4792226.html   (17711 words)

 Optics of Prisms
Prisms are usually classified by the shapes of the bases; so we have triangular, rectangular, hexagonal and other types of prism.
In optics, prisms made for the purpose of dispersing light are usually made with bases that are equilateral triangles, so that the angles between adjacent sides of the prism are 60°.
For small angles, the deviation of a glass prism is about 1/3 of the prism angle, so a wedge angle of only a degree and a half would suffice to mimic the refraction of the standard atmosphere.
mintaka.sdsu.edu /GF/explain/optics/prisms.html   (803 words)

 X-ray interferometer using prism optics   (Site not responding. Last check: 2007-10-20)
A prism made of acrylic resin is used as the beam deflector.
A portion of coherent X-ray beam is deflected by passing through the prism, and superimposed on the direct beam at the image plane.
When the distance between prism and image plane is 5 m, the beam overlap becomes 500 micron.
lbl.confex.com /lbl/sri2003/techprogram/paper_3691.htm   (248 words)

 Optics4Birding.com - All About Optics - Designs
If price is a major consideration, several of the mid-range optics may not have quite as many elements (both objective and eye piece), features, and options but are still fine optics with only slight differences in viewing ability under most situations.
The roof prism is a more modern design that consists of two prisms cemented together in a single interior mount.
Modern roof prism binoculars tend to have two separate prisms that are cemented together, rather than two offset prisms of the porro prism design.
www.optics4birding.com /basics1.aspx   (1395 words)

Every scientist since Aristotle had believed light to be a simple entity, but Newton, through his experience when building telescopes, believed otherwise: it is often found that the observed images have colored rings around them (in fact, he devised the reflecting telescope, Fig.
His crucial experiment showing that white light is composite consisted in taking beam of white light and passing it through a prism; the result is a wide beam displaying a spectrum of colors.
If this wide beam is made to pass through a second prism, the output is again a narrow beam of white light.
phyun5.ucr.edu /~wudka/Physics7/Notes_www/node58.html   (172 words)

 Light and Optics
A second prism recombines the colors to produce white light; alternatively, colors may be recombined in a glass globe.
Schlieren Optics Temperature variations in the index of refraction of air are dramatically demonstrated.
Edge Diffraction Schlieren optics is used to demonstrate the diffraction of light around objects (l) (T+++); more simply done with razor blade and laser or white light source.
www.fas.harvard.edu /~scdiroff/lds/LightOptics/LO.html   (910 words)

 Prism - Wikipedia, the free encyclopedia
Prism (optics), a device used to refract light
PRISM (chipset), a wireless networking chipset made by Conexant
This is a disambiguation page: a list of articles associated with the same title.
en.wikipedia.org /wiki/Prism   (98 words)

 MSN Encarta - Search Results - Prism (optics)
Optics, branch of physical science dealing with the propagation and behaviour of light.
Prism (optics), block of glass or other transparent material that has the same cross-section—usually a triangle—along its length.
The ways in which lenses form images depend on the laws of refraction.
uk.encarta.msn.com /Prism_(optics).html   (112 words)

In geometrical optics the wave theory of light is ignored and rays are traced through an optical system by applying the laws of reflection and refraction.
It is predicted by the field of geometrical optics that rays of light originating from a point are imaged by spherical optical parts as a small blur.
Physical optics deals with the study of the polarization of light, interference and diffraction, and the spectral emission, composition, and absorption of light.
www.sciencebyjones.com /optics.htm   (4470 words)

 Optical Prism Images - Super Optical Guide   (Site not responding. Last check: 2007-10-20)
Prism can often be used to align the images seen by both eyes, so the eyes can fuse or see the same image...
Optical prisms are blocks of optical material with flat polished sides arranged at precisely...
Prisms: Since the objective lenses form images that are both upside down...
www.superopticalguide.com /optical-prism-images.html   (781 words)

 Classroom Chalkboard Optics Demonstrations   (Site not responding. Last check: 2007-10-20)
This kit consists of light sources, mirrors, prisms, gratings, and large Acrylite components which may be secured singly or in combinations to a classroom chalkboard by means of magnetic clamps.
The bending of a light ray toward the normal as it enters a dense medium is clearly demonstrated with the rectangular prism.
The principle of the prism binocular is thus demonstrated and the critical angle is shown to be less than 45º for the material for which the prism is made.
physicsnt.clemson.edu /physdemo/6/demos/Ablackbo.htm   (966 words)

 Edison's Optics: Space: 1889 for Prism
Prism is a work in progress; as of this writing, one of the largest steps on the way to Prism v2, Skill Trees, is in testing but hasn't been integrated into the main rules.
Instead, each supplement describing a genre or setting will be named by finding a sobriquet for "prism" or "crystal" that would be used in, or is evocative of, that setting.
In an era of fantastic science, a cut glass lens might be referred to by a scientist or inventor as an optic, and could be used for experiments to understand the nature of light, to focus or scatter light in an invention, or even to use light to shape the world itself.
www.rpglibrary.org /systems/prism/s1-1889.html   (4573 words)

 [No title]   (Site not responding. Last check: 2007-10-20)
In optics, a prism is a device used 5 to reflect light 2 or to break it 8 up (to disperse it) 8 into its constituent 5 spectral colors (colors 0 of the rainbow), traditionally 5 built in the shape 3 of a right 5 prism with triangular base.
The angle that 6 the beam of light 7 makes with the 5 interface as well 5 as the refractive 8 indices of the two 4 media determine whether it 7 is reflected or 0 refracted, and by how 9 much (see refraction, total 9 internal reflection).
Newton 4 placed a second prism 1 such that a separated 8 color would pass through 4 it and found the 4 color unchanged.
www.thecontactlens.net /prism__optics__.htm   (297 words)

 Bird Watcher's Digest: Optics: Choosing Optics
His concept of placing two right-angled prisms in each barrel of a set of binoculars is still used today.
The disadvantages are weight (the better transmission of light is due to large prisms, which are weighty) and bulkiness, which can make Porros hard to use for small-handed folks.
Raise the optics to your eyes and slowly expand the space between the barrels until you have the maximum amount of view or image space.
www.birdwatchersdigest.com /site/optics/choosing_optics.aspx   (2903 words)

 Birding Binoculars Glossary
The third element are the prisms, located between the objective lenses and the eyepieces.
The prisms also fold the light path so that the overall length of the binoculars is shortened.
There are two main styles of binocular design depending of the kind of prism system used, roof prism and Porro prism.
www.birdwatching.com /optics/binocglossary.html   (819 words)

 light prism at Business.com   (Site not responding. Last check: 2007-10-20)
Manufacturer of fiber optic components such as scintillating glass faceplates, fiber optic faceplates, fiber optic image guides, capillary arrays...
If a shaft of light entering a prism is sufficiently small such that the...
Reflective prisms are used to reflect light, for instance in binoculars,...
www.business.com /popular/light_prism   (462 words)

 Photop Optics Announces Low Price and Ultra High Precision Penta Prism
The chief attribute of the penta prism is that it does not invert or reverse the image.
The design of this prism is a 90 degree beam deviation will result without precise alignment of the prism with respect to the incoming beam or image.
Photop Optics Co., Ltd. fully owned by PHOTOP Technologies, Inc., is dedicated to designing, developing, manufacturing and distributing the comprehensive optics components for optics instrument, telecom and laser industry.
www.photoptech.com /new05/news/2004080901.php   (246 words)

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