This is a computer with holographic technology. The so-called "holographic technology" was first applied to photography. It actually uses the interference principle of light. The unique light wave information of the object is recorded on the photosensitive material, and the hologram is obtained after development and fixing. There is no image on this hologram. If you want to see images, you must reproduce light waves. The reproduced image is exactly the same as the original, just like looking at the scenery outside through the window. You can see different sides of the object by moving your eyes. When you watch scenes with different distances, the effect is even better, just like watching a drama performance. The meaning of interest should be development and fixation.
What does holography mean?
To put it bluntly, holograms are all information. All information of light includes intensity and phase, and ordinary photography can only keep the former, so it is only a plane figure. Holography can not only express the information of object light, but also see the three-dimensional picture of the object through the negative through certain means. Holography uses the principle of light interference.
What does holography mean?
Holography (from Latin, whole+ drawing compound) refers to a technology that allows diffracted light emitted by an object to be reproduced in the same position and size as before. Observing this object from different positions, the image it displays will also change. So the photos taken by this technology are three-dimensional.
Holography can be used for optical storage, reproduction and information processing. Although holographic technology has been widely used to display static three-dimensional images, it is still impossible to display objects arbitrarily by using three-dimensional volume holographic technology.
What is a "holographic film"?
holographic movies
A new film developed according to holography. The holographic film is projected by laser during the screening, and the audience can see the stereoscopic image without wearing stereoscopic glasses. Holographic film technology is complicated, so it must be irradiated by laser when shooting. If the laser energy is large, it will hurt the actors, and if it is small, it will not achieve the shooting effect. So it is generally used to shoot scenery films, puppet film and animals. Prose film (1) The film creation concept and artistic style that appeared in Europe in the 1920s and 1930s, as opposed to "poetry film". Advocates of Soviet "Prose Film" believe that the central task of film art is to create "heroes that can be loved by the audience"; The main thing in the film is "people, their actions, their relationship"; "Image can only be created through the relationship with others and events"; Advocate movies to "learn from prose". Their representative works include Xia Boyang (directed by Vasiliev Brother), Lenin in October (directed by Rome), Ma Kexin Trilogy (directed by Grigori Mikhailovich Kozintsev) and Big Citizen (directed by ailm Lear). These films have shaped the image of revolutionary leaders, described the ideological development and character growth of heroes, expressed the environment of the times and praised nothingness through narrative structure and psychological depiction of characters. In the early 1930s, there was a fierce debate between "Prose School" and "Poetry School" in the Soviet film industry. ② Since the 1940s, it is generally regarded as an artistic style relative to "drama film". Starting with the American film Citizen Kane (directed by orson welles) and the Italian "new realism" film. This kind of film does not follow the traditional dramatic structure and does not adopt complete plot conflict. But through various narrative means and multi-faceted, multi-level and multi-voice methods, the works are closer to the original form of life, thus creating authentic artistic effects. This kind of film does not exclude drama, but shows some regularity and dramatic factors in real life from the description of natural daily life and the relatively free prose structure.
What holographic movies are often seen are holographic creatures, so what is holography?
Holography refers to the use of laser technology in photography to record all the light information of the object on the negative, unlike ordinary photography, which only records the projection of one side of the object. Therefore, when the object on the negative is reproduced, it looks very realistic in the eyes of the viewer, and its visual effect is exactly the same as that when watching the real thing.
The principle of holography, in short, mainly uses the pure color characteristics of laser. In fact, the theory of holography was put forward by British scientist Gabriel as early as 1947. But it was not until the laser with high brightness, pure color and good coherence appeared that holography was really photographed.
Holography and stereo photography are two different things. Although stereoscopic color photos look bright, layered and stereoscopic, they are still single-sided images, and even the best stereo photo can't replace the real thing. For example, no matter how we change the observation angle of a square block, we can only see the picture in the photo. But holograms are different. We can see this square by changing the observation angle.
The second feature of holography is that we can know the whole picture at one point. When the hologram is damaged, even if most of it is damaged, we can still see the whole picture of the original object in this hologram from the remaining half. This is not good for ordinary photos, even if a corner is lost, you can't see the picture of that corner.
The third feature of holographic photos is that multiple holographic photos can be recorded in layers on a holographic negative without interfering with each other when displaying pictures. It is this layered recording that enables holograms to store a large amount of information.
Why do holograms have such characteristics? Why don't ordinary photos have these characteristics? This should start with the shooting principle.
If a tiny particle is irradiated with a laser beam, the light wave reflected by the tiny particle is basically a spherical wave extending outward. When we look at this small grain, it is a bright spot. When shooting small particles with a camera, light waves form a bright spot on the negative through the lens, and the brightness of this bright spot is related to the light intensity reflected by the small particles. Photographic negatives can record this bright spot, but we can't remember the position of this small particle in three-dimensional space. There is only one bright spot in the printed photo. There seems to be no three-dimensional sense. When taking a hologram, a laser beam emitting plane wave and spherical wave reflected by small particles shines on the photographic negative together. The whole negative is illuminated, recording not a bright spot, but a group of concentric circles. When concentric circles are small, they look like a radish cut into pieces with a knife and piled together. Become a set of concentric rings. After the film is washed, put it back in its original position, and then use a laser beam that emits plane waves when shooting to shine on the film at the angle when shooting. We can see a bright spot where the tiny particles used to be. Attention! This bright spot is in space, not on the film, and the light we see seems to come from this bright spot. So the hologram records not only a bright spot, but also the spatial position of the bright spot, or the whole light wave emitted by the bright spot. The whole mystery lies in this novel shooting method, which is a parallel (plane wave) laser beam. This laser beam is called a reference beam.
So any object can actually be regarded as a three-dimensional image composed of countless bright spots with different shades. The hologram shot by the above shooting method is a complex figure composed of countless concentric circles, which also looks gloomy. Similarly, this hologram not only records the brightness of each point of the object, but also records the spatial position of each point. When a developed negative is irradiated with a reference beam, the light we see seems to be emitted from the original object. Therefore, we say that it records all the light information emitted by the object, hence the name hologram. However, only under the irradiation of laser can the eyes have stereoscopic images, and laser is an expensive device. It is impossible to equip a photo with a laser, except in scientific research departments and special places. In view of this shortcoming, scientists continued to study and finally invented an incandescent lamp.
The negative of laser holography can be special glass, latex, crystal or thermoplastic. A small special ......
Can holographic projection TV watch ordinary TV programs?
At present, it is most likely augmented reality. That is, the actual scene does not have any stereoscopic projection, but captures the identification points in real time through the lens, calculates the spatial information, adds the D effect in real time, and synthesizes the output video with the source lens.
What is a holographic film? Find a solution
A new film developed according to holography. The holographic film is projected by laser during the screening, and the audience can see the stereoscopic image without wearing stereoscopic glasses. Holographic film technology is complicated, so it must be irradiated by laser when shooting. If the laser energy is large, it will hurt the actors, and if it is small, it will not achieve the shooting effect. So it is generally used to shoot scenery films, puppet film and animals.
What is 3d TV? What is holographic TV? Why do 3d movies look like cards?
Because 3d movies make things in the entrance clearer, while things in the distance are blurred and look stereoscopic.
The principle of holographic film
Holography uses the interference of light waves to record and reproduce images. Hologram is a complete record of light wave front, and only a pattern composed of many thin lines can be seen directly, which has no similarity with the object being photographed. However, when the hologram is irradiated with laser, you can see a completely stereoscopic image behind the hologram without wearing any special glasses. Shooting holographic film requires the use of coherent light sources and high-resolution photographic film, as well as beam splitters and mirrors with specified optical paths, but no objective lens is needed. The shooting process is as follows: the coherent light source is divided into two beams, one of which is directly aimed at the photosensitive plate (2) and is called the reference beam (4); A beam of light is aimed at the object (3), reflected by it and reaches the photosensitive plate, which is called object beam (1). Two beams of light meet in the plane of the photosensitive plate. Because of the different optical paths and phases, interference occurs, resulting in interference patterns, which are recorded by the photosensitive plate and become holographic plates. The wavelength and direction of the light emitted by the coherent light source are the same, and it is monochromatic light with flat wavefront and continuous progress without interference. This kind of light is an important condition for producing interference patterns. The principle of generating holograms can be traced back to 300 years ago, and some people have done experiments with poor coherent light sources. But it was not until 1960 that laser was invented, and laser was the best coherent light source, so holography developed rapidly.