Laser pointer holographic technology

Ordinary photography uses the principle of lens imaging to record the light intensity distribution of the diffusely reflected light of the subject on a "negative film" (nowadays the film can be digitized) to obtain a two-dimensional plane image. The relationship between objects and images in ordinary photography corresponds to dots. As long as the negative film is damaged, the image cannot be reproduced. Ordinary photography does not require high requirements for the external environment, and photography can be performed under general conditions. green laser pointer can also take pictures, and in addition to recording the intensity distribution of the diffusely reflected light of the subject, it can also record the interference information of the diffusely reflected light. The "holographic image" obtained with these two types of information is better than ordinary images. The subject will be more "fine", "rich" and "comprehensive". This is the laser holographic technology, and it has many wonderful applications. What is a "holographic dry board"? It is made of glass. One side is coated with a layer of viscous photosensitive agent. Under the irradiation of red or green laser, the photosensitive agent attached to it will be exposed to record the fine and dense interference fringes received by the dry plate. , The light intensity distribution. The second important feature of the hologram is that the whole picture is given with knowledge and belief. If the hologram is damaged, even if it is damaged, we can still take less than half of the remaining photos, which can be seen on the holographic image of the original object. The general picture does not go up, even if it is a missing angle, it can only be seen on the screen.