Technical application of holographic image technology

The principle of holography is applicable to all kinds of waves, such as X-rays, microwaves, sound waves and electronic waves. At present, the most commonly used light source is the projector. On the one hand, the brightness of the light source is relatively stable, and on the other hand, the projector has the function of enlarging images, which is very practical as a holographic display.

As long as these fluctuations have sufficient coherence in forming the interference pattern. Optical holography is expected to be widely used in three-dimensional movies, televisions, exhibitions, microscopes, interferometry, projection lithography, military reconnaissance and surveillance, underwater detection, internal detection of metals, preservation of precious historical relics, works of art, information storage, remote sensing, research and recording of transient phenomena and transient processes (such as explosion and combustion) with extremely rapid changes in physical state. Scientists have developed infrared, microwave and ultrasonic holographic technology, which is of great significance in military reconnaissance and surveillance.

Some fighters are equipped with this kind of equipment, which enables pilots to concentrate on the enemy. Holography can give a three-dimensional image of the target, while general radar can only detect the direction and distance of the target, which is of great significance to identify aircraft and ships in time. Holography not only records the reflection intensity on the object, but also records the phase information. Therefore, even if only a small part of a holographic picture is retained, it can still reproduce all the scenery. This is very convenient for museums, libraries, etc. Save your favorite pictures. In the big-screen cinema, wearing special glasses, the audience blends into the film with super-large stereoscopic picture and surround sound effects, bringing immersive realism.

In addition, because holographic photography technology can record all the information of the object itself, the storage capacity is large enough, so as a storage carrier, holographic storage technology can also be applied to the preservation of documents in libraries, schools and other institutions.

Compared with the traditional 3D display technology, holographic imaging technology does not need to wear special polarized glasses, which not only brings convenience to the audience, but also reduces the cost. Moreover, the three-dimensional display mode can introduce the exhibits to the audience from multiple angles, which is more intuitive.

Because visible light decays quickly when it propagates in the atmosphere or water, it can't even work in bad weather. In order to overcome this difficulty, infrared, microwave and ultrasonic holographic techniques have been developed, that is, coherent infrared, microwave and ultrasonic holographic photos are taken, and then the image of the object is reproduced by visible light. This holographic technology has the same principle as the ordinary holographic technology. The key of technology is to find sensitive recording media and suitable copying methods. The method of holography has expanded from the optical field to other fields. Such as microwave holography and acoustic holography, have been greatly developed and successfully applied to industrial medical care. Holography of seismic waves, electronic waves and X-rays is also under in-depth study.

At the same time, holography can be applied to nondestructive testing, ultrasonic holography, holographic microscope, holographic memory, holographic film and television and many other aspects in industry.

Holographic technology can not only produce realistic three-dimensional images to beautify people's lives, but also be used in securities, commodity anti-counterfeiting, commodity advertising, promotion, artistic pictures, exhibitions, book illustrations and artistic decoration, packaging, interior decoration, medicine, criminal investigation, physical evidence photography and identification, building three-dimensional imaging, scientific research, teaching, information exchange, portrait three-dimensional photography and three-dimensional film and television and many other fields. In recent years, it has also developed into a wide range of holographic packaging materials.