First of all, holographic projection technology has always been one of the focuses of attention of countries 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.
We must first figure out what holographic projection technology is: holographic projection technology (front-projected holographic display), holographic projection technology is a kind of 3D technology, originally referring to the technology of using the principle of interference to record and reproduce the real three-dimensional image of objects. Then, with the guidance of science fiction movies and commercial propaganda, the concept of holographic projection has gradually extended to commercial activities such as stage performances and exhibitions. However, what we know now is not a true holographic projection, but a technology that achieves 3D effects by means of Pepper's ghost and edge blanking.
The concept of "holography" comes from the Greek word "holo", which means "complete information", that is, it contains the amplitude and phase information in the light wave. General photography can only record the intensity information of light, that is, the amplitude. However, in the interference process of holographic technology, the superposition between peaks and waves will be higher, and the superposition of peaks and troughs will flatten the resulting series of irregular stripes, thereby converting the phase information into intensity information and recording it on photosensitive materials such as OPC (organic photosensitive drum), amorphous silicon photosensitive drum, and cadmium sulfide photosensitive drum. At this time, the observer can see different parts of the object from different angles, as if the object is right in front of him at this time.
The definition of holographic technology is relatively broad. If it is subdivided, it can be divided into: optical holographic technology, digital holographic technology, computational holographic technology, microwave holographic technology, reflection holographic technology, acoustic holographic technology, etc. The traditional holographic technology commonly seen in our daily life is optical holographic technology. This technology is mainly distributed in three fields: entertainment industry, education and training, marketing and advertising.
First of all, in the entertainment field, such as concerts, stage performances and sports events, holographic performances have become a more popular form of innovation. Artists and producers can present realistic virtual reality scenes through holographic projection technology, bringing an immersive and shocking experience to the audience.
Then in education, students can interact with virtual images through holographic projection technology, simulate real scenes, enhance learning effects, and use projection for real-time simulation and training to improve learning efficiency.
Finally, in marketing, merchants can use holographic projection technology to display three-dimensional models of products to attract consumers' attention, or display store advertisements in projections. This type of publicity is becoming more and more common, creating a unique visual effect for the brand.
It can be seen that holographic projection technology has great potential in the future. The technology is constantly developing and breaking through, and there is hope that it can achieve more amazing effects in the future. First of all, the most anticipated thing is to achieve the interactivity of holographic projection. At present, most holographic projections can only project the image of objects and cannot interact specifically. In the future, it will be combined with image and gesture recognition technology. People can interact with projections through gesture control or voice commands, further enhance the sense of immersion, and greatly improve the convenience of use. Finally, there is the potential in medicine. Future doctors can use holographic projection technology to visualize anatomical structures, diagnose diseases, and perform virtual surgery simulations. This is very helpful to improve the accuracy and safety of surgery and provide a better training environment for medical workers.
Although the concept of "holography" has a relatively good mass base in China, most users are not clear about what constitutes a true "hologram". For example, Microsoft's HoloLens is only a binocular stereoscopic virtual display, not a holographic display. Therefore, when we judge whether something is a true "hologram", we only need to know whether there is a hologram.