What is holographic projection display?

Lead: With the development of digital technology, numbers have been integrated into us. Orthographic holographic display, also known as virtual imaging technology, is a technology that records and reproduces the real three-dimensional image of an object by using the principles of interference and diffraction. Holographic projection technology can not only produce three-dimensional illusion in the air, but also make the illusion interact with the performers to complete the performance together, resulting in shocking performance effects. Scope of application: product display, automobile and clothing conference, stage program, interaction, bar entertainment, interactive projection of places, etc.

What technology is holographic projection display?

Holographic projection technology is divided into the following three types:

1, air projection and interactive technology

ChadDyne, a 29-year-old graduate student of science and technology in Massachusetts, USA, invented an air projection and interactive technology, which is a milestone in display technology. It can project interactive images on the wall formed by airflow. This technology comes from the principle of mirage, and the image is projected on the small water droplets formed by the liquefaction of water vapor. Because of the uneven vibration of molecules, images with strong layering and three-dimensional sense can be formed.

2. The laser beam projects the 3D image of the entity

A Japanese company, ScienceandTechnology, invented a laser beam to project a 3D image of an entity. This technology uses nitrogen and oxygen to diffuse in the air, and the mixed gas becomes hot slurry, forming a short 3D image in the air. This method is mainly realized by continuous small-scale blasting in the air.

3.360 degree holographic display screen

Researchers at the Institute of Innovation and Technology of the University of Southern California announced that they have successfully developed a 360-degree holographic display screen. This technology projects an image on a high-speed rotating mirror to realize a three-dimensional image. It can be said that many countries are developing these technologies. It is no exaggeration to say that this technology contains the future. Whoever uses this technology first will be the first to enter the ranks of advanced technologies in the future.

What is the holographic principle? In principle, a system can be described with some degrees of freedom on its boundary? It is a new basic principle based on the quantum characteristics of black holes. In fact, this basic principle is related to the quantum theory of combining quantum elements and quantum bits. Its mathematical proof is that there are as many quantum elements as there are dimensions of time and space; There are as many qubits as there are. Together, they form a finite set of time and space similar to a matrix, that is, their permutation and combination set. Holographic incompleteness means that there is duality among the selected permutation number, the selected empty set and the selected full permutation. That is, the holography of a certain dimension of space-time is completely equivalent to the holography with one less quantum bit arrangement number; This is similar? Quantum error-avoiding coding principle? The problem of systematic calculation error caused by coding error in quantum computing is fundamentally solved.

The first step is to record the light wave information of the object by using the interference principle, which is the shooting process: the object to be photographed forms a diffuser beam under laser irradiation; The other part of the laser beam, as a reference beam, hits the holographic negative and interferes with the object light beam, converting the phase and amplitude of each point on the object light wave into spatially varying intensity, thus recording all the information of the object light wave by using the contrast and interval between interference fringes. Negative recording interference fringes become holograms, or holograms, after being developed and fixed.

The second step is to reproduce the light wave information of the object by using the diffraction principle, which is the imaging process: the hologram is like a complex grating. Under the irradiation of coherent laser, the diffracted light waves of linearly recorded sinusoidal holograms can generally give two images, namely the original image (also called the initial image) and the conjugate image. The reproduced image has strong stereoscopic effect and real visual effect. Every part of the hologram records the light information of every point on the object, so in principle, every part of the hologram can reproduce the whole image of the original object. Through multiple exposures, multiple different images can be recorded on the same negative, and they can be displayed separately without interference.