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Topic: Porro Abbe prism

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	Optics4Birding.com - All About Optics - Designs
		The porro prism was the first of these two designs and consists of two mirrors mounted separately.
		Modern roof prism binoculars tend to have two separate prisms that are cemented together, rather than two offset prisms of the porro prism design.
		Porro prism designs consequently tend to be much more susceptible to alignment problems if dropped.
	www.optics4birding.com /basics1.aspx (1395 words)

	Porro-Abbe prism - Wikipedia, the free encyclopedia
		A Porro-Abbe prism (sometimes called a Abbe-Porro prism), named for Ignazio Porro and Ernst Abbe, is a type of reflection prism used in some optical instruments to alter the orientation of an image.
		For ease of manufacture, the prism is often made as a pair of double-right-angled prisms and the two halves cemented together.
		The Porro-Abbe prism should not be confused with the dispersive Abbe prism or the non-dispersive Abbe-Koenig prism.
	en.wikipedia.org /wiki/Porro-Abbe_prism (241 words)

	Porro prism - Wikipedia, the free encyclopedia
		In optics, a Porro prism, named for its inventor Ignazio Porro, is a type of reflection prism used in optical instruments to alter the orientation of an image.
		Double Porro prism systems are used in small optical telescopes to re-orient an inverted image (an arrangement is known as a image erection system), and especially in many binoculars where they both erect the image and provide a longer, folded distance between the objective lenses and the eyepieces.
		A single Porro prism is a type of roof prism, though it is not used in this way in binoculars.
	en.wikipedia.org /wiki/Porro_prism (325 words)

	Olympus Microscopy Resource Center: Physics of Light and Color - Introduction to Prisms and Beamsplitters
		Porro prisms are often employed in traditional binocular configurations, where they are doubled together orthogonally to first invert and then reverse light beams to produce erect or upright images.
		Although at first glance the dove prism appears to be a good candidate for dispersion (due to the angular entrance of the light beam), transmission of light through the prism is actually equivalent to passage through a slab of glass with the side benefit of image rotation.
		Penta prisms are often referred to as an optical square (as applied to surveying instruments), because the incoming light beam is deviated at the same angle, regardless of the prism orientation with respect to the line of sight.
	www.olympusmicro.com /primer/lightandcolor/prismsandbeamsplitters.html (5074 words)

	Prism Kite
		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 dual of a prism is a bipyramid.
	www.breadlike.com /pages7/68/prism-kite.html (1430 words)

	Abbe prism - Wikipedia, the free encyclopedia
		In optics, an Abbe prism, named for its inventor, the German physicist Ernst Abbe, is a type of constant deviation dispersive prism similar to a Pellin-Broca 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°.
		The dispersive Abbe prism should not be confused with the non-dispersive Porro-Abbe or Abbe-Koenig prisms.
	en.wikipedia.org /wiki/Abbe_prism (189 words)

	Prism Yarn (Site not responding. Last check: )
		Porro-Abbe prism - A Porro-Abbe prism (sometimes called a Abbe-Porro prism), named for Ignazio Porro and Ernst Abbe, is a type of reflection prism used in some optical instruments to alter the orientation of an image.
		Abbe prism - In optics, an Abbe prism, named for its inventor, the German physicist Ernst Abbe, is a type of constant deviation dispersive prism similar to a Pellin-Broca prism.
		Glan-Thompson prism - A Glan-Thompson prism is a type of polarizing prism similar to a Nicol prism.
	quilt.vvvvvv3.com /prismyarn.html (604 words)

	Photo Safaris - Binoculars - Wildlife Photographers Never Leave Home Without Them
		There can be numerous advantages to Porro prism binoculars, including a substantial transmission of light to your eye creating brighter images, faster and relatively closer focusing capabilities than many roof prism models, and a wider (angle of) view than most roof prism binocs are capable of producing.
		Among the disadvantages to Porro prisms is their weight—quality Porro prism binoculars have large and heavy internal glass prisms that make them weighty, bulky (and often unwieldy) for many people, especially those with small hands.
		They often dont focus as closely as Porro prism glasses (which is important if you are going to use them for birding activities and want to view birds in nearby shrubs), and they tend to be more expensive than Porro prism optics as well.
	www.photosafaris.com /Articles/Binoculars.asp (2757 words)

	Abb Relays
		Abbe numbers are only a useful measure of dispersion for visible light, and for other wavelengths, or for higher precision work, the group velocity dispersion is used.
		Abbe is best known for his work in optics; however, during his association with Carl Zeiss' microscope works, in Jena, he introduced the eight-hour workday, in remembrance of the 14-hour workday of his own father.
		Abbe was most known as a plastic surgeon, and between 1877 and 1884 he served as a surgeon and professor of surgery at the New York Hospital, St. Luke's Hospital, and the New York Babies Hospital.
	www.breadlike.com /pages7/1/abb-relays.html (942 words)

	[No title]
		The reversing prism of Delaborne.] In common glass, the width of the penetrating ray bundles is 1 : 3 for 0 degrees and 180 degrees reflections, and largest at 90 degrees and 270 degrees.
		A prism pair from the Brewster telescope.] The effect of the prism system on the quality of the image is equal to a reticle, perpendicular to the ray axis, that is as thick as the path of the chief ray through the prisms.
		The Porro II prism is in the binocular in fig.
	www.europa.com /~telscope/trkonig.txt (9088 words)

	Porro prism, prism venture, triangular prism
		Porro prism Bausch & Lomb® Discoverer® Porro Prism Binocular.
		Porro Prism models, such as the Audubon 8x40 Family, are offset in design,.
		Porro prism binoculars, spotting scopes, tripods, telescopes, birds, birding, bird watching, astronomy, optics, optics for hobbies, microscopes, nature scopes,.
	www.security-deposit.net /prism/porro_prism.html (1003 words)

	Prism (optics) Summary
		A prism is a clear solid used to manipulate the path of a light ray, either by bending it, splitting it, or polarizing it.
		Prisms can be found in a wide variety of shapes and sizes and can possess a number of sides.
		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).
	www.bookrags.com /Prism_(optics) (1222 words)

	Prism (optics) - Free net encyclopedia
		Image:PrismAndLight.jpg 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.
	www.netipedia.com /index.php/Prism_(optics) (313 words)

	Porro-Abbe prism
		A Porro-Abbe prism (sometimes called a Abbe-Porro prism), named for Ignazio Porro and Ernst Abbe, is a type of reflection prism used in some optical instruments to alter the orientation of an image.
		The prism is not dispersive since light enters and exits the prism only at normal incidence.
		The Porro-Abbe prism should not be confused with the dispersive Abbe prism or the non-dispersive Abbe-Koenig prism.
	www.lookitup.co.za /p/o/r/Porro-Abbe_prism_bd04.html (272 words)

	[No title]
		Not until years later did Leitz built larger Porro I models in the manner of the Binoctar, with the metal parts mostly of brass, and only the prism housings of aluminum (as was standard).
		The prism mount obviously did not effectively protect the prisms against impact, and in regards to temperature changes, was not an effective design.
		If present, the reticle was cemented in between the prism and the field lens in the Zeiss H models, and therefore protected against damage or dirt, and of course also protected against later improvements.
	www.europa.com /~telscope/7x50.txt (3042 words)

	Deck prism? You can found more info here.
		Prisms rectangular, types bases; triangular, hexagonal usually are the have handspring prism visor by of and so the we shapes of other classified prism.
		When varied handspring prism visor can angles deviation prism from be respect the deviation relationship varying the two the each zero sum of prisms the in to by used pairs with to of the angular individual other.
		The prism is the of area the of the sides of the all a sum areas surface of prism.
	1897233.sitesled.com /gordeeva-roger.html (1287 words)

	Binocular Instrument - LoveToKnow 1911 (Site not responding. Last check: )
		This was probably due to the fact that, at this time, the manufacture of the glass for the prisms was too difficult; this was overcome by E. Abbe, after the founding of -the glassworks at Jena, who effected, independently of his predecessors,.
		Of special importance is the work of Abbe; although, as he himself has stated, his methods accidentally led to the Wenham system, he certainly was far above his predecessors in his theoretical treatment of the problem, and in the perspicuity and clearness of his explanation.
		The problem was attacked in 1861 by A. Rollet; later, in 1866, E. Mach published a promising idea, and finally-independently of the researches of his predecessors-Hektor de Grousilliers, in partnership with the Zeiss firm (E. Abbe and C. Pulfrich), constructed the first stereoscopic range-finder suitable for practical use.
	www.1911ency.org /B/BI/BINOCULAR_INSTRUMENT.htm (1223 words)

	[No title] (Site not responding. Last check: )
		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)

	Abbe prism - Education - Information - Educational Resources - Encyclopedia - Music
		The prism consist of a block of glass forming a right prism with 30°-60°-90° triangular faces.
		This is the minimum possible deviation of the prism, all other wavelengths being deviated by greater angles.
		The dispersive Abbe prism should not be confused with the non-dispersive Porro-Abbe prism.
	www.music.us /education/A/Abbe-prism.htm (372 words)

	Binoculars - Wikipedia, the free encyclopedia
		Binoculars with prisms to shorten the optical path and erect the image may have double-Porro-prism design, which gives a Z-shaped optical path.
		Binoculars that use roof prisms (either the Abbe-Koenig or Schmidt-Pechan designs) are narrower, more compact, and more expensive than those that use Porro prisms.
		However, as of 2005, the optical quality of the best roof-prism binoculars with up-to-date coating processes as used in Schmidt-Pechan models is comparable with the best Porro glasses, and it appears that roof prisms will dominate the market for high-quality portable binoculars in spite of their higher price.
	en.wikipedia.org /wiki/Binoculars (2780 words)

	Prism (optics) info here at en.37of100d.info (Site not responding. Last check: )
		In optics, a prism is a article used to refract light, reflect it or hole it up (to disperse it) into its constituent spectral colours (colours of the rainbow).
		Reflective prisms are used to reverse light, for circumstantiality in binoculars, since they're easier to manufacture than mirrors.
		Dispersive prisms are used to hole up resplendent into its constituent spectral colours for the refractive index depends on frequency (see dispersion); the waxen resplendent entering the prism is a mixture of incomparable frequencies, each of which gets bent somewhat differently.
	en.37of100d.info /Prism_(optics) (549 words)

	Abbe Diaz April 2003 \| Porro Abbe Prism \| Abbe Odysey \| Abbe Language Sign (Site not responding. Last check: )
		We are going to help you to lust over the cutting edge bargains for l aposabbe mouret and anything in league to abbe diaz april 2003.
		We have put in a big effort on the Internet in search of the most competitive offers for abbe peter and finalized our results on this summary site that list the websites that offer ease when shopping for abbe diaz april 2003.
		We painstakingly researched everything on paul o abbe take your time and visit our links because it will be time very well spent.
	www.casg.info /abbe-diaz-april-2003.htm (334 words)

	Zeiss
		Abbe said "Based on a precise study of the materials used, the designs concerned are specified by computation to the last detail - every curvature, every thickness, every aperture of a lens - so that any groping around is excluded".
		On 4 January 1881 Schott met Abbe who prompted him to employ a scientific approach to the determination of ingredients to be used in, and the development of manufacturing techniques of what would become more than 100 new types of optical and industrial glasses.
		Abbe was also interested in social reforms culminating in the formation in 1889 of the "Carl-Zeiss-Stiftung" (something akin to a foundation) to operate the various Zeiss concerns, with a mission to ensure the Zeiss firm follow the social vision of its founders.
	www.smecc.org /ziess.htm (8709 words)

	Document: P-Z
		All Zeiss binoculars containing roof prisms are provided with this phase correction coating which significantly improves resolution.
		Pechan-type prisms have a mirrored surface where between 4% and 6% of the available light is lost.
		The rubber armor on the binocular's housing is primarily used to protect the surface and to mute noise.
	www.zeiss.com /C1256BCF0020BE5F/ContentsWWWIntern/2F74E36875A2227785256DF1006E6BBF (663 words)

	Prism - Information (Site not responding. Last check: )
		triangular, a triangular 14219 gyroelongated a optics prism, or the are used reflective is made triangle typically, half equilateral with one equilateral prism were used.
		Prism monochromators are Porro In optics Porro, named reflection optics prism used in a geometry geometric with angled the undergoes total the is not Porro is rotated Porro.
		A second rotated 90 the system is Porro Double Porro systems are Porro prism is the Porro prism.
	home.tiscali.de /onlineinfo/prism.html (207 words)

	Interested in Pentagonal prism? Right place for it! Pentagonal Prism!
		When the the prism rotation about rotated prism at image axis, is prism rotates length viewed the twice the its through rate.
		The properties ring refracted that the the prisms are prisms the wavelengths chosen so will around of one of correctly are when be optical the aligned.
		The light enables coloured a white prism students experiment white light light, into a applying the to and filters material spectrum with series and changing colours, splitting prisms to is from the made source.
	1897233.sitesled.com /bunnykins-effectively.html (1887 words)

	American Science & Surplus: Optics - Prisms
		Use them as spectroscopic prisms, put two hypotenuse to hypotenuse as beam splitters.
		They look like two small right angle prisms cemented together, but are actually made from one piece of glass.
		The pure bubble-free optical glass renders these prisms optical jewels suitable for window sills, earrings, and general spectral fascination.
	www.sciplus.com /category.cfm?category=189 (500 words)

	Prism Yarn
		Pellin-Broca prism - A Pellin-Broca prism is a type of constant deviation dispersive prism similar to an Abbe prism.
		Poly yarn is buggy, buoyant, prism yarn and blendable, the perfect material for tying effective fishing flies.
		Instructions are provided for choosing materials prism yarn and equipment, skeining prism yarn and preparing yarn, prism yarn and painting prism yarn and dyeing the yarn--all with materials that are found in most grocery prism yarn and craft stores.
	www.web-tees.com /prismyarn.html (1060 words)

	Company Seven \| Carl Zeiss Companies History Page
		Among Abbe's most significant breakthroughs was the formulation in 1872 of what a wave theory of microscopic imaging that became known as the "Abbe Sine Condition".
		On 4 January 1881 Schott met with Dr. Abbe who prompted Schott to employ a scientific approach to the determination of raw ingredients to be used in glass formulations, and the development of manufacturing techniques of what would lead to the development of more than one hundred new types of optical and industrial glasses.
		Abbe was also interested in social reforms culminating in the formation in 1889 of the "Carl-Zeiss-Stiftung" (something akin to a foundation) to operate the various Zeiss concerns, with a mission to ensure the Zeiss firm follows the social vision of its founders.
	www.company7.com /zeiss/history.html (9941 words)

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