What is holographic projection technology?

First of all, holographic projection technology has always been one of the focuses of attention by countries around the world, and this technology has brought us an unprecedented visual experience. From science fiction movies to real life, holographic projection technology has gradually become one of the focuses of people's attention.

We first have to figure out what is holographic projection technology?

Holographic display technology (front-projected holographic display) is a kind of 3D technology, which originally refers to the technology that uses the principle of interference to record and reproduce the real three-dimensional image of an object. Later, with the guidance of science fiction films and commercial promotion, the concept of holographic projection gradually extended to commercial activities such as stage performances and exhibitions. However, what we know so far is not a holographic projection in the true sense of the word, but a 3D effect achieved by means of Pepper's ghost and edge blanking.

The concept of "holographic" comes from the Greek word "holo", which means "complete information", that is, it contains the amplitude and phase information in the light waves, and general photography can only record the intensity information of light, that is, the amplitude. However, in the process of holographic interference, the superposition between peaks and waves will be higher, and the superposition of peaks and troughs will flatten a series of irregular fringes produced, so that the phase information will be converted into intensity information and recorded on photosensitive materials such as OPC (organic photoreceptor drum), amorphous silicon photoreceptor drum, cadmium sulfide photoreceptor drum, etc. The observer can then see different parts of the object from different angles as if the object were in front of them at this time.

The definition of holographic technology is relatively broad, if it is subdivided downward, it can be divided into: light holographic technology, digital holographic technology, computational holography technology, microwave holography technology, reflection holography technology, sound holography technology, etc., the traditional holographic technology that is common in our lives is optical holography technology. The technology is located in three main areas: entertainment, education and training, marketing and advertising.

First of all, in terms of entertainment, holographic performances such as concerts, stage performances and sporting events have become a hot form of innovation. Artists and filmmakers can use holographic projection technology to present realistic virtual reality scenes to bring audiences an immersive and powerful experience.

In terms of education, students can interact with virtual images through holographic projection technology, simulate real scenes, strengthen the effect of learning, and use projection for real-time simulation and training to improve learning efficiency.

Finally, in terms of marketing, businesses can use holographic projection technology to display 3D models of products to attract consumers' attention, and can also display store advertisements in projections, which are becoming more and more common and create unique visual effects for brands.

It can be seen that the potential of holographic projection technology in the future is very huge, the technology is constantly developing and breaking through, there is hope that more amazing effects can be achieved in the future, first of all, the most anticipated is to realize the interactivity of holographic projection, the vast majority of the current holographic projection can only project the image of the object, and can not carry out specific interaction, in the future by realizing the combination of image and gesture recognition technology. People can interact with the projection through gesture control or voice commands, which further enhances the sense of immersion and greatly improves the convenience of use. Finally, there is the potential of medical care, where future doctors can use holographic projection technology to visualize anatomy, diagnose diseases, and perform virtual surgical simulations. This greatly helps to improve the precision and safety of surgeries, as well as a better training environment for medical workers.

Although the concept of "holographic" also has a relatively good mass base in China, the vast majority of users do not know what is really "holographic", for example, Microsoft's HoloLens is only a binocular stereoscopic virtual display, not a holographic display, so when we judge whether something is a real "holographic", we only need to know whether there is a hologram.