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I have chosen to do my MIS paper on holograms. I have chosen this topic because it is a technology that has been around for sometime now, but has become increasingly more popular in recent years. Holograms are now found in virtually all types of products. These products consist of currencies, checks, stock certificates, credit cards, passports, ID cards, computer software, audio/visual tapes and CD ROMs, aircraft, software, electrical/electronic appliances, building materials, food, pharmaceuticals, cosmetics, food, building materials, branded fashion wear, tickets for performances and major sporting events, textbooks, toys, the list goes on.
Although the possibility of holography was suggested as early as 1947, it could not be demonstrated until a pure coherent light source, the laser became available in 1963.
The techniques of holograms are also applicable to sound, and bats may navigate by ultrasonic holography. Holographic techniques also have applications in storing dental records, detecting stresses and stains on construction and retail goods, detecting forged paintings and documents, and producing three-dimensional body scans.
Holography is a method of producing three-dimensional images by means of laser light. Holography uses photographic techniques involving the splitting of two beams apart.
So you may be wondering, what exactly is a hologram? The easiest way to describe it is a three dimensional picture. Like if you had a picture of a big marble, and had a smaller marble behind it you would not be able to look around the big marble to see the little one.
Holography though, has very little to do with photography. A photograph is an actual image; a snapshot taken in a seconds time to preserve a memory. “A hologram contains information about size, shape, brightness, and contrast of the object being recorded.” (www.holoworld.com/holo/quest2) “The information is stored in a very microscopic and complex pattern of interference. The interference pattern is made possible by the properties of light generated by a LASER.” (www.holoworld.com/holo/quest2)
In order to have a hologram be effective and accurate it needs two things:
1.Light needs to be highly directional
If it is done correctly your eyes and brain perceives the object as being in front of you. Basically it is a mind trick.
Earlier I mentioned holography. This is a method that allows the “recording and playback of true-three dimensional images.” (www.holoworld.com/holo/quest1) Holograms posses an effect unlike other 3D images. This is known as “parallax.” “Parallax allows the viewer to move back and forth, up and down, and see different perspectives”(www.holoworld.com/holo/quest1)
Dr. Dennis Gabor, Imperial College of London invented holography. In 1971 he received the Nobel Prize in physics for holography. Although, round the world, holographic images and techniques are constantly being improved upon. Still holography has proved to be the most accurate interpretation of three-dimensional images in the world.
Holograms are made be using a LASER light. Did you know that LASER is actually an acronym that stands for Light Amplification by Stimulated Emissions of Radiation? Anyway, a LASER is a special source of light that was invented in the early 60’s. Generally, A laser is a very thin glass tube, about the size of a straw that you use to drink a soda. In the glass tube there is gas, most commonly it is Helium and Neon. There are several different sizes, brands, and types of LASERS. LASERS are used in a variety of fields such as medical, scientists, jewelry makers, appliances, etc
“Laser’s produce light that has very special characteristics: first the light is monochromic, or a single wavelength/color. Second, the light from a LASER is coherent, which means it has all of its waves traveling in sync with one another.” (www.holoworld.com/holo/quest4) I said earlier that there are several different types of Laser’s. The one the works best for holograms are LASER diode, which costs about $14-15.00. Some people may argue that the HeNe LASER is far more accurate, however it costs between $800-900.00. I guess it really just depends on how much money you want to spend and how involved you are with holograms.
By now you are probably interested in how exactly holograms are made. The holograms that are typically for sale in shops are made in a professional holography laboratory. “A typical lab consists of a LASER, a vibration-isolated optical table, lenses, mirrors, optical holders and ... more