Holographic projection technology: phantom and reality
Preface
First of all, holographic projection technology has always been one of the focuses of attention around the world. 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.
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We must first understand what holographic projection technology is: holographic projection technology (front-projected holographic display) is a type of 3D technology. It originally refers to the technology that uses the interference principle to record and reproduce the true three-dimensional image of an object. Then, with the guidance of science fiction movies and commercial promotions, the concept of holographic projection gradually extended to commercial activities such as stage performances and exhibitions. But what we know so far is not holographic projection in the true sense, but technologies such as Pepper's ghost and edge blanking to achieve 3D effects.
The concept of "holography" comes from the Greek word "holo", which means "complete information", which means it contains amplitude and phase information in light waves. General photography can only record the intensity information of light, which is the amplitude. However, in the interference process of holographic technology, the superposition between peak waves will be higher. The superposition of peak waves and troughs will flatten the resulting series of irregular stripes, thereby converting phase information into intensity information and recording it on, for example, OPC (organic photosensitive drum) ), amorphous silicon photosensitive drum, cadmium sulfide photosensitive drum and other photosensitive materials. The observer can now see different parts of the object from different angles, as if the object were right in front of him.
The definition of holographic technology is relatively broad. If it is subdivided downward, it can be divided into: optical holographic technology, digital holographic technology, computational holographic technology, microwave holographic technology, reflection holographic technology, acoustic holographic technology, etc. Traditional holographic technology that is common in our daily lives The technology is optical holographic technology. This technology is mainly distributed in three areas: entertainment industry, education and training, marketing and advertising.
First of all, in terms of entertainment, holographic performances in concerts, stage performances and sports events have become a popular innovative form. Artists and producers can use holographic projection technology to present realistic virtual reality scenes, giving audiences an immersive and shocking experience.
Then in terms of re-education, students can interact with virtual images through holographic projection technology to simulate real scenes and enhance the learning effect. They can also use projection for real-time simulation and training to improve learning efficiency.
Finally, in terms of marketing, merchants can use holographic projection technology to display three-dimensional models of products to attract consumers' attention. They can also display store advertisements in the projection. This type of publicity method is becoming more and more common, creating a unique vision for the brand. Effect.
It can be seen that the potential of holographic projection technology in the future is very huge. This technology is constantly developing and making breakthroughs. It is hoped that it can achieve more amazing functions in the future. The first thing worth looking forward to is the interactivity of holographic projection. Most of the current holographic projections can only project images of objects and cannot perform specific interactions. In the future, image and gesture recognition technology will be combined. 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 for medical treatment. In the future, doctors can use holographic projection technology to visualize anatomical structures, diagnose diseases, and perform virtual surgical simulations. This greatly helps improve the accuracy and safety of surgeries and provides a better training environment for medical workers.
Although the concept of "holography" also has a relatively good mass base in China, most users do not know what is a true "hologram". For example, Microsoft's HoloLens is only a binocular three-dimensional virtual display, not a hologram. display, so when we judge whether something is truly "holographic" we only need to know whether there is a hologram.
