Characteristics of holographic projection

Holographic projection technology is a type of 3D technology, which originally referred to the technology of recording and reproducing real three-dimensional images of objects using the principle of interference. Guided by science fiction movies and commercial promotions, Holographic projection the concept has gradually become known to the general public. However, the holography we usually know is often not strictly speaking Holographic projection but a technology that uses methods such as Pepper's ghost and edge blanking to achieve 3D effects. Holographic projection technology.

The word "hologram" comes from Greek "holo", meaning complete information, which includes amplitude and phase information in light waves. Ordinary photographic technology can only record light intensity information (amplitude), while depth information (phase) will be lost. In the Holographic projection interference process of the technology, the superposition of crests and crests will be higher, and the superposition of crests and troughs will be leveled, thus producing a series of irregular, light and dark stripes, which convert phase information into intensity information and record it on photosensitive material.

Holographic projection Features of the technology:

1. Holographic projection The technology can record all information about the amplitude and phase of the object's light waves, and can reproduce them. Therefore, the application of holographic technology can obtain three-dimensional images identical to the original object. Observing the reconstructed virtual image of the hologram from different angles, one can see different sides of the object, with inspection effect and depth of field.

2. Any part of a 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, forming an elementary hologram, meaning that every point or part of the hologram records scattered light from all object points. Therefore, every part of the object's hologram can reproduce all object points that illuminated that point during recording, thus forming an image of the object, which means that a part of the hologram can still reproduce the object's image even after damage.

3. As a recorder of light wave information, the presence or absence of a hologram is an important criterion for judging whether the 3D technology we encounter is Holographic projection technology.