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Topic: Holography

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In the News (Fri 26 Apr 19)

  Holography - Wikipedia, the free encyclopedia
Holography (from the Greek, Όλος-holos whole + γραφή-graphe writing) is the science of producing holograms; it is an advanced form of photography that allows an image to be recorded in three dimensions.
Holography was discovered over Easter, 1947 by Hungarian physicist Dennis Gabor (1900–1979), for which he received the Nobel Prize in physics in 1971.
The difference between holography and photography is best understood by considering what a fl and white photograph actually is: it is a point-to-point recording of the intensity of light rays that make up an image.
en.wikipedia.org /wiki/Holography   (3696 words)

 holography. The Columbia Encyclopedia, Sixth Edition. 2001-05
Holography using laser light was developed during the early 1960s and has had several applications.
In research, holography has been combined with microscopy to extend studies of very small objects; it has also been used to study the instantaneous properties of large collections of atmospheric particles.
Another new technique is acoustical holography, in which the object is irradiated with a coherent beam of ultrasonic waves (see sound; ultrasonics); the resulting interference pattern is recorded by means of microphones to form a hologram, and the photographic plate thus produced is viewed by means of laser light to give a visible three-dimensional image.
www.bartleby.com /65/ho/holograp.html   (524 words)

 stereoscopy.com - FAQ
Holography (from the Greek, holos whole + graphe writing) is the science of producing holograms, an advanced form of photography that allows an image to be recorded in three dimensions.
Holography was invented in 1947 by Hungarian physicist Dennis Gabor (1900-1979), for which he received the Nobel Prize in physics in 1971.
The difference between holography and photography is best understood by considering what a photograph actually is: it is a point-to-point recording of the intensity of light rays that make up an image.
www.stereoscopy.com /faq/holography.html   (646 words)

 INTEGRAF--How to Make Holograms
In the process, we make holography not only as simple as possible, but safer, less expensive, and more accessible to young people.
The traditional helium-neon laser, on the other hand, operates on dangerously high voltages, is prone to breakage, has a shorter shelf life, and a coherence length of approximately 30 cm.
Holography Kits that can be purchased from Integraf's catalog, and will make both reflection and transmission holograms.
www.holokits.com /a-simple_holography.htm   (1525 words)

 HOLOPHILE, INC., The History and Development of Holography, hologram, holograms, holography, holography exhibitions, ...
The Museum of Holography was founded in 1976 in New York City as an international center for the understanding and advancement of this new medium.
The promise that holography holds is beginning to be fulfilled by artists who see in the medium a new way to express themselves through pure light and color.
Holography is used to depict the shock wave made by air foils to locate the areas of highest stress.
www.holophile.com /history.htm   (4642 words)

 History of  the holography   (Site not responding. Last check: 2007-10-07)
Holography dates from 1947, when British (native of Hungary) scientist Dennis Gabor developed the theory of holography while working to improve the resolution of an electron microscope.Gabor coined the term hologram from the Greek words holos, meaning "whole," and gramma, meaning "message".
In 1962 they read Gabor's paper and "simply out of curiosity" decided to duplicate Gabor's technique using the laser and an "off-axis" technique borrowed from their work in the development of side-reading radar.
Denisyuk's approach produced a white-light reflection hologram which, for the first time, could be viewed in light from an ordinary incandescent light bulb.
www.holography.ru /histeng.htm   (694 words)

 Holography, Laser Holography
In holography, the aim is to record complete wave field (both amplitude and phase) as it is intercepted by a recording medium.
He introduced a two step lensless imaging process known as wavefront reconstruction technique or holography (Greek word holos means whole, complete), in which an interference between the object field and the background wave (known as reference wave) is formed and recorded on a photographic material.
Thus, in holography an interference between the light reflected and scattered by the object, called the object (signal) beam and a reference beam is created and recorded on a photographic emulsion.
www.hololight.net /holography.html   (713 words)

The purpose of the holography experiment is to assist the alignment of the SMA antenna panels to acheive an overall surface rms of 5-10 microns.
The RF passband of the holography main receiver should include both the 92.4 GHz frequency of the holography beacon, as well as the 86 GHz SIO maser frequency.
The microwave holography technique, commonly employed in obtaining the antenna aperture field from the far field measurement, is well suited for the purpose of fast and accurate measurement of the antenna surface, once the initial mechanical alignment of the paraboloid is done.
sma-www.harvard.edu /private/eng_pool/xzhang/holography.html   (668 words)

 Physics News Update
Quantum holography, on the other hand, is a method firmly grounded in modern physics that permits the imaging of hidden objects with entangled photons.
Of the quantum entanglement phenomena that Einstein described as "spooky action at a distance," quantum holography may be the spookiest to date.
In quantum holography, the researchers measure the simultaneous arrivals of an illuminating photon that is sent into the chamber and a companion photon in the other entangled beam.
www.aip.org /enews/physnews/2001/split/566-1.html   (424 words)

 MIT MUSEUM HOME - Exhibitions & Galleries - Holography: The Light Fantastic
Scientific and artistic applications of holography in diverse fields such as medicine, engineering, and retailing as well as architecture, portraiture and abstract art are represented.
A holographic image of the Lindow Man, the 2000-year-old remains of a man discovered in a bog in England, demonstrates the use of holography for anthropological, educational, and archival purposes.
The Museum’s collection chronicles the history of the science and technology of holography, capturing both the fine art that represents new and unusual expressions in media as well as holography’s industrial and commercial applications.
web.mit.edu /museum/exhibitions/holography.html   (296 words)

 Holography   (Site not responding. Last check: 2007-10-07)
Holography is "lensless photography" in which an image is captured not as an image focused on film, but as an interference pattern at the film.
The coherent light from the laser is split to form an object beam and a reference beam.
It is as if the light from the object was frozen in the film, and then continues to your eye when reconstructed with the laser light.
hyperphysics.phy-astr.gsu.edu /hbase/optmod/holog2.html   (202 words)

Like Kinetics and Neon, Holography is a branch of the Art and Technology Studies department.
Holography is considered part of Art and Technology because it allows students, after learning the basics, to incorporate different technologically based mediums into their work.
Holography has been used by photographers, animators, filmmakers, graphic designers, illustrators, painters, sculptors, fashion designers and jewelry designers.
www.artic.edu /saic/programs/depts/undergrad/holography.html   (564 words)

 HighBeam Encyclopedia - holography
HOLOGRAPHY [holography], method of reproducing a three-dimensional image of an object by means of light wave patterns recorded on a photographic plate or film.
Holography Q & A: looking underneath the glitter.
Acoustic holography pinpoints source of noise in products.(Testing/Analysis)
www.encyclopedia.com /html/h1/holograp.asp   (542 words)

 HOLOPHILE, INC., About Holography, hologram, holograms, holography, holograph, holography exhibitions, holographic ...
Pulsed holography uses a quick, intense burst of laser light to record the subject in few nanoseconds — too quick for movement to be a factor.
Integral holography, developed by Lloyd Cross, combines holography with cinematography to record a stereogram as a white-light transmission hologram.
The Guide to Practical Holography, by Chris Outwater and Van Hamersveld is an excellent book for the beginner.
www.holophile.com /about.htm   (2061 words)

 Physics News Update
Neutron holography with atomic-scale resolution has been performed, for the first time, with an "inside-detector" approach.
Holography generally includes a source of illuminating waves, an object to be imaged, and a detector or film in which waves direct from the source interfere with waves scattered from parts of the object.
The interference pattern, stored in the detector medium, is later read out (and a 3D image of the object viewed) by sending waves into the detector.
www.aip.org /enews/physnews/2002/split/609-1.html   (382 words)

 Holography   (Site not responding. Last check: 2007-10-07)
Introduction History of holography Physical laws Holography and artist Holography and photo Types of holograms Holography applications Holographic scenes Glossary
Holography is one of the remarkable achievements of a modern science and technology.
The word "holography" originated from the Greek words holos - whole and grapho - write, that means complete record of the image.
holographyinfo.org   (297 words)

 Amateur Holography   (Site not responding. Last check: 2007-10-07)
Another important recent development in amateur holography is the use of inexpensive laser diodes in the place of He-Ne gas lasers to make holograms.
The principle of holography was discovered in Britain by Dennis Gabor in 1948.
Most holograms in holography museums are of this type.
members.aol.com /gakall/holopg.html   (2571 words)

 INTEGRAF--Holographic Film, Plates, Kits, and Resources
Contact Us erving customers from over 40 countries each year, Integraf is your one-stop shop for holographic film and plates, instructions, and resources, so you can make holograms and teach holography.
Holography kits for teachers, students, and hobbyists (details)
ounded in 1973 by holography researcher and educator Professor Tung H. Jeong, Integraf is devoted to making holography known and easily accessible to everyone.
www.holokits.com   (153 words)

 MIT Museum - Collections & Research - Holography Collection
The holography collection at the MIT Museum documents the history of holography since its inception in the late 1940s.
A selection of the 1,800 pieces in the collection is on view in the Museum’s exhibition Holography: The Light Fantastic.
A holographic image made of the remains of the 2000-year-old Lindow Man, discovered in a bog in England, demonstrates the use of holography for anthropological, educational, and archival purposes.
web.mit.edu /museum/collections/holography.html   (364 words)

 Holography without Lasers: Hand-drawn Holograms [SCIENCE HOBBYIST]
This is impossible of course, since holography is completely based upon interference effects.
The classic single-stage "Rainbow" holography setup includes a horizontal slit which produces relatively large horizontal swatches of fine-line interference patterns on the film, and these encode the depth information as variations in orientation of the fringes across the stripe.
And conventional holography won't let you sit by the side of a lake in Vermont with plexi and dividers, drawing holographic virtual images of floating polyhedra by hand.
www.eskimo.com /~billb/amateur/holo1.html   (2054 words)

· To encourage a closer liaison between workers in all areas of holography for the purpose of interchanging ideas, obtaining or giving help, criticism or advice on the many aspects of the subject.
· To hold meetings, seminars and conferences for the discussion of matters relating to holography, and for the furtherance of the objects detailed above.
Membership of the RPS Holography Group is available to all members of the Royal Photographic Society upon payment of
www.holography.co.uk   (101 words)

 Holography - virtual gallery   (Site not responding. Last check: 2007-10-07)
Holography represents photographic process in a broad sense of this word, essentially differs from a usual photo because there is a registration not only intensity in a photosensitive material, but also phase of light waves, scattered by the object and carried the complete information about three-dimensional structure of the object.
As the medium of mapping of the reality, hologram has unique property: unlike usual photo, the holographic image can reproduce exactly three-dimensional copy of the original object.
You can read about holography, its features, including holography as a new kind of fine art.
www.holography.ru /maineng.htm   (354 words)

 Cherry Optical Holography   (Site not responding. Last check: 2007-10-07)
Cherry Optical Holography presents Greg Cherry's large,best depth, and image projection holograms, as small 4 inch x 5 inch film holograms mounted on 8 inch x 10 inch mats, ready for framing.
These are inexpensive film versions of Greg Cherry's most famous and expensive glass holograms (some of which cost several hundred to several thousand dollars and are on large glass plates), including the 200 hologram frame HAND which comes out of the hologram and literally is in the viewer's face, grasping.
Among the most beautiful of holograms, and a house specialty of Cherry Optical Holography, holographic diffraction gratings are difficult and frustrating to picture on paper.
www.hmt.com /holography/cherry/cherry.html   (1380 words)

 Holography Lasers and Holograms
Attend a holography workshop at my laser studio, or have a holography workshop travel to you.
Shoebox holography is the #1 selling laser and holography do-it-yourself book across the nation.
A previously published paper of mine from LaserNews concerning the holographic principles behind the functioning of the brain and the structure of the universe.
www.holoworld.com   (411 words)

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