Traditional Culture Encyclopedia - Photography and portraiture - What is 3D holographic projection?

What is 3D holographic projection?

3D holographic projection technology 3D holographic technology is a technology that uses the principles of interference and diffraction to record and reproduce the true three-dimensional image of an object. Its principle is applicable to various forms of vibration, such as x-rays, microwaves, sound waves, and electrons. Bo et al. As long as these waves have sufficient coherence when forming interference patterns.

3D holographic projection technology is used in three-dimensional movies, pavilions, exhibitions, military reconnaissance, internal metal exploration, preservation of precious historical cultural relics and artworks, remote sensing, and research and recording of instantaneous phenomena and instantaneous processes with extremely rapid physical changes. It has been widely used in various aspects.

The 3D holographic projection system uses the interference principle to record the light wave information of the object. This is the shooting process: the photographed object forms a diffuse object beam under laser irradiation.

The other part of the laser is used as a reference beam and is emitted on the holographic film. It superimposes with the object beam to generate interference, converting the phase and amplitude of each point on the object light wave into a spatially varying intensity, thereby utilizing the interference fringes. The contrast and spacing record all the information of the object's light waves.

Extended information

1. Holographic technology can record all the information of the object’s light wave amplitude and phase, and can reproduce it. Therefore, applying holographic technology can obtain a three-dimensional image that is exactly the same as the original object (observing the reproduced virtual image of the hologram from different angles, you can see different sides of the object, giving you an inspection effect and a sense of depth of field).

2. Any part of the hologram can reproduce the basic shape of the original object. The spherical waves scattered from any point on the object can reach every point or every part of the holographic dry plate and interfere with the reference light. A primitive hologram is formed, that is, each point or part of the hologram records scattered light from all object points.

Therefore, each part of the object hologram can reproduce all the object points that illuminated the part during recording, forming an image of the object. That is, the partial hologram can still reproduce the image of the object after being damaged.

Baidu Encyclopedia-Holographic Projection