Holographic Technology

by:Homkey Packaging     2020-03-06
In order to cut this big cake, digital camera manufacturers are also constantly developing new technologies or rapidly applying existing technologies to the field of digital cameras to maintain and enhance their position in the field of digital cameras. Sony in DSC- The focus mode of F707 uses holographic laser auto-focusing assistance. It can also be said that holographic technology has been applied to the field of photography. So what is holographic technology? What is the difference between holography and traditional photography? Hologram Hologram was proposed by Gabe Gabor in 1948 to improve the image quality of electron microscope. Its significance lies in complete recording. Gabriel's experiment solved the basic problem in the invention of holography, namely, the recording and reconstruction of wavefront. However, due to the lack of bright Coherent Light Source Laser at that time, the imaging quality of hologram was very poor. In 1962, with the advent of the laser, Leith and upatknicks Leith and uppatieks introduced the concept of carrier frequency on the basis of Geber holography and invented off-axis holography, the main problem of poor Hologram imaging quality at that time was effectively overcome--- Twin images and three-dimensional object display became a hot topic in holography research at that time, but this kind of imaging science far exceeded the economic development at that time, the cost of making and observing this kind of hologram is very expensive. Holography has basically become a synonym for maintaining unrealistic fantasies with high funds. In 1969, Benton invented rainbow holography, which set off a new upsurge of holographic three-dimensional display characterized by white light display. Rainbow hologram is a plane hologram that can realize white light display. Compared with Denisyuk's reflection hologram, besides observing bright stereoscopic images under ordinary incandescent lamps, it also has the advantages of simple hologram processing process and easy copying. The application of holographic technology to the field of photography is far superior to ordinary photography. Ordinary photography is based on the principle of lens imaging, and the three-dimensional scene is 'projected' onto the planar photosensitive plate to form a light intensity distribution, the recorded photos have no stereoscopic impression, because the images obtained from each perspective are exactly the same. Holography reproduces an accurately copied object light wave. When we 'see' this object light wave, we can observe different sides of the reproduced stereo image from various angles, like seeing realistic objects, it has depth of field and parallax. If we shoot two 'Mercedes' car models side by side, then when we change the direction of observation, the covered part of the latter car will be exposed. No wonder people are excited about a hologram taken by a 'Mercedes-Benz' car at the exhibition: 'Seeing the reappearance of the car is like pulling the door and sitting on the' Mercedes-Benz ', too brilliant! 'A Hologram is equivalent to many ordinary photos taken and focused from multiple angles. In this sense, the amount of information in a hologram is equivalent to 100 or 1000 ordinary photos. Looking at the surface of the hologram with a high-power microscope, you can see complex stripes, and you can't see the image of the object at all. These stripes are the interference between the object light wave emitted by the object illuminated by the laser and the reference light wave of the standard light wave, it is recorded on the plane photosensitive bottom plate, I . e. the object light wave is 'frozen' by coding method. Once the illumination light wave similar to the reference light wave is encountered, the imaging light wave will be emitted, which is like the original light wave being released again. Therefore, the principle of holography can be expressed in eight words: 'interference recording, diffraction reproduction '. Knowing this technology, we can apply holographic technology to a wide range of fields, and photograph some precious cultural relics with this technology. When exhibited, the cultural relics can be truly reproduced in three dimensions for visitors to enjoy, the original is properly preserved and anti-theft. The large hologram can display cars, satellites and various three-dimensional advertisements. It can also use pulse holography to reproduce portraits and wedding commemorative photos. A small hologram can be worn on the neck to form a beautiful decoration. It can reproduce people's favorite animals, colorful flowers and butterflies. The rapidly developing molded rainbow hologram can not only become vivid cartoons, greeting cards and three-dimensional stamps, but also appear as anti-counterfeiting marks on trademarks, ID cards, bank credit cards and even bank notes. Holographic stereo photos decorated in books and holographic rainbows shining on gift packaging make people realize the new leap of printing technology and packaging technology in the 21st century. Molded holographic logo, due to its three-dimensional layering, rainbow effect changing with the observation angle, ever-changing anti-counterfeiting marks, and close combination with other high-tech anti-counterfeiting means, the anti-counterfeiting technology of the new century has been pushed to a new brilliant peak.
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