What is the hologram imaging technology
So what is the holographic imaging technology? What are the characteristics? How to achieve the image of dynamic three-dimensional display of it? First, we need to learn more about two important aspects of holography and holographic video display.
Object Sketch in Art
Hologram is in photography while the two types of information recorded at the same time to achieve. Using a laser as a light source, and light from the source is divided into two beams, a bunch fired directly photosensitive sheet, another bunch reflection object and then directed to the photosensitive sheet. The two light beams on the photosensitive sheet superposed interference the photosensitive extent of each point on the photosensitive film is not only with the intensity with the phase relationship of the two light beams with different. Holography not only records the reflective intensity on the object, the phase information is also recorded. Compared with the ordinary photography technology, holography technology recorded in the additional information, information amount much greater capacity than the ordinary photo (hundred or even thousands of times or more).
The display of the image of the hologram, is irradiated by the light source on the hologram, the frequency of the light source and the transfer direction of this beam with the reference beam completely, as a stereoscopic image of the object can be reproduced. Audience from a different perspective, you can see multiple sides of an object just visible scratching, because the record only images.
Currently the most commonly used light source projector to light source brightness is relatively stable, and secondly, the projector also has a magnified image, as the very practical holographic display.
Principle of hologram imaging technology
In order to allow a more intuitive understanding of the hologram technical principles of the holographic image, following a schematic presentation to show how hologram is made.
Hologram projection imaging done by projector
If we pay attention to the words, will find the beginning of the article we provide the supermodel KateMoss hologram video, a bracket around the image, in fact those are vitreous (high transparency of the medium can be) a multi pyramid, holographic images via computer transmission projected into the vitreous to the projector, then through different angles of light diffraction to achieve stereoscopic images.
Because simultaneously display all the information of the various angles of the object, therefore, look up to the same as in the range of sight like to see a complete picture of the object, in order to achieve the stereo effect.
Conventional 3D display principle
Compared with the hologram imaging technology, why in the past we often traditional 3D display environment will need to use special polarized glasses? This is related to its technical principles.
LED-backlit 3D rear projection TV
Need the help of polarized glasses
Everyone will pay attention to the words found in the above 3D hologram renderings the instant fact, there are two groups of the screen at the same time, but when not wearing polarized glasses, we see two pictures superimposed. In fact, this is because the useof the left and right eye images interactive display screen, the vertical sync signal switch as a shutter can be reached in the purpose of the three-dimensional hologram imaging. Therefore, if no wear special polarizing glasses or cover any one eye, then it can notbe synthesized in the human eye stereoscopic image. Because the left and right eyes of the output picture must be provided at least 60 frames per second screen, so the vertical scanning frequency of the display device must meet the 120Hz or higher.
The effect of not wearing polarized glasses (two different pictures at the same time hologram display)
3D display of the core equipment
Traditional 3D images by means of a vertical scanning frequency must reach 120Hz or higher monitor or TV or projector There are also polarized glasses, and specialized 3D graphics driver. Further, since 3D hologram image is the left and right eyes simultaneously displayed in order to avoid the signal of the left and right eye deviation (image dislocation), but also need the help of a signal synchronizer, the right and left eye signal synchronized. Above a group of pictures is the core component of traditional 3D display. Compared with holographic technology, traditional 3D display technology involves more hardware and software equipment, any equipment problems are image appears three-dimensional imaging effect.