Analysis of the principle of 3D holographic projection in a dialogue across time and space

On September 6, 2013, at the three-day Jay Chou’s 2013 'Magic Tianlun' World Tour, the virtual Teresa Teng made its debut. Teresa Teng, dressed in a white cheongsam, slowly rises from the stage, resembling Teresa Teng’s face The 98% degree, the vivid movements, demeanor and singing voice made it difficult for the audience in the audience to distinguish between true and false. At the concert site, I completed a cross-temporal duet with Jay Chou. How did this happen? The original singing The conference site uses a 3D holographic projection technology. So what is 3D holographic projection? Jay Chou uses 3D holographic projection and Teresa Teng to achieve a dialogue across time and space. 3D holographic projection is a way to use interference and diffraction principles to record and reproduce the true three-dimensional object Image is a kind of 3D technology that does not need to wear glasses. The audience can see three-dimensional virtual characters. It is suitable for product exhibitions, automobile clothing conferences, stage programs, interaction, bar entertainment, interactive projection in places, etc. 3D holographic stereo projection equipment It is not realized by digital technology, but the projection equipment projects images from different angles onto the imported MP holographic projection film, allowing you to see other images that do not belong to your own angle, thus realizing a true 3D holographic stereoscopic image. 3D holographic projection Principle analysis The first step of the technical principle is to use the principle of interference to record the light wave information of the object. This is the shooting process: the object is irradiated by the laser to form a diffuse object beam; the other part of the laser is shot on the holographic film as a reference beam. Superimposed with the object beam to produce interference, convert the phase and amplitude of each point on the object light wave into a spatially varying intensity, so as to use the contrast and interval between the interference fringes to record all the information of the object light wave. Negative film that records the interference fringes After processing procedures such as development and fixing, it becomes a hologram, or hologram; the second step is to use the principle of diffraction to reproduce the light wave information of the object. This is the imaging process: the hologram is like a complex grating, in the coherent laser Under irradiation, the diffracted light waves of a linearly recorded sinusoidal hologram can generally give two images, namely the original image (also known as the initial image) and the conjugate image. The reproduced image has a strong stereoscopic effect and a real visual effect. Each part of the hologram records the light information of each point on the object, so in principle, each part of it can reproduce the entire image of the original object. Through multiple exposures, multiple different images can be recorded on the same film. And it can be displayed separately without interfering with each other. 3D holographic projection Holographic projection is a Nolid 3D technology that does not require glasses, so that the audience can see three-dimensional virtual characters. This technology is widely used in some museums. Holographic three-dimensional The projection equipment is not realized by digital technology, but the projection equipment projects images from different angles onto the imported MP holographic projection film, so that you cannot see other images that are not your own angle, thus realizing a true holographic three-dimensional image. 360-degree phantom imaging system: 360-degree phantom imaging is a kind of imaging that suspends the three-dimensional picture in the mid-air of the real scene, creating an atmosphere of illusion and reality. The effect is peculiar and has a strong sense of depth. The real object can be combined in the middle to realize the image and Combination of physical objects. It can also be equipped with a touch screen to achieve interaction with the audience. It can be made into four-sided windows according to requirements, with a maximum of 2-4 meters on each side. It can be made into a holographic phantom stage, a three-dimensional 360-degree demonstration of the product; a real person and an imaginary person perform on the same stage; a fantasy stage in a science and technology museum, etc. We can often see a three-dimensional holographic communication technology in science fiction movies, which can project distant people or objects into the air in a three-dimensional form, just like the scenes in the movie 'Star Wars.' In addition, with the development of science, all devices are miniaturized and refined, but display devices cannot match them. Humans are increasingly demanding a new display technology to solve problems. The 3d holographic projection plays exactly this role.