Laser holography technology application
Holographic photography and stereo photography are two different things. Although a three-dimensional color photo looks bright, well-defined, and three-dimensional, it is still a one-sided image. No matter how good the three-dimensional photo is, it cannot replace the real object. For example, a three-dimensional image of a square wooden block, but when we change the angle of view, we can only see the image in the photo, but the hologram is different and the angle is different. Observation can change the display of six square points. Since the holographic technology can record all the geometric information of the object on the film, this is also the most important feature of the film. The emergence of laser opened up a broad prospect for the development of holography. From 1961 to 1962, EN Leith and others improved the Gabor hologram and introduced the "oblique reference beam method" to solve the "twin image" problem in one fell swoop. The first practical Laser pointer hologram was successfully taken with a HeNe laser. This makes holography one of the most active branches in the field of optics after 1963.
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The development of holography has so far gone through three stages: the first stage is the initial stage of holography, this stage is mainly theoretical research and a small amount of experiments. The second important feature of holography is that it can be seen from one point. Laser recording laser reproduction period. The second stage is the period of recording and reproducing with laser after the emergence of laser. The bleak future of holography was not reappeared until the beginning of the 1960s due to the work carried out by the University of Michigan Radar Laboratory. ENLeith and J. Upatnieks, who are engaged in the research of synthetic aperture antennas in the laboratory, almost made helium-neon lasers by Javen et al. [3], made epoch-making improvements to Gabor's technology, and successfully carried out three-dimensional diffusion at the same time. Recording and reproduction experiments of objects.
2021-10-12 11:34:13
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