What is the principle of 360-degree holographic projection?

360-degree holographic projection technology, also known as virtual imaging technology, mainly uses the principles of interference and diffraction to reproduce the three-dimensional image of the object, which is the reverse display process of holographic photography technology.

360-degree holographic projection principle-interference principle

Before projection, it is necessary to record the projected "shadow", which is the first step of holographic projection technology, that is, to record the light wave information by using the interference principle and complete the shooting process. In the process of shooting, a part of the laser irradiates the object to form a diffuser beam, and the other part of the laser irradiates the holographic negative as a reference beam and overlaps with the object beam to produce interference. Interference is to convert the phase and amplitude of each point on the object light wave into spatially varying intensity, and record all information by using the contrast and interval between interference fringes. The negative recording interference fringes is developed and fixed to become a hologram.

360-degree holographic projection principle-diffraction principle

After completing the shooting process to form a hologram, the second step is to reproduce the light wave information of the object based on the hologram and complete the imaging process. In the process of imaging, the hologram is irradiated with coherent laser to form two images, the original image and the yoke image, and the reconstructed image has a strong stereoscopic effect and visual effect. Because each part of the hologram records the light information of every point on the object, each part of the hologram can reproduce the whole image of the original object. After multiple exposures, multiple different images can be recorded on the same negative and displayed separately without interference.