What does holography mean?

Holography refers to a technology that allows diffracted light emitted from an object to be reproduced in the same position and size as before.

1947, the Hungarian physicist dennis gabor (1900- 1979) in Imperial College London, London, England, discovered the holographic technology and won the Nobel Prize in Physics of 197 1 year. Holography refers to a technology that allows diffracted light emitted from an object to be reproduced in the same position and size as before.

Observing this object from different positions, the image it displays will also change. So the photos taken by this technology are three-dimensional. Holography can be used for optical storage, reproduction and information processing. Although holographic technology has been widely used to display static three-dimensional images, it is still impossible to display objects arbitrarily by using three-dimensional volume holographic technology.

Types of holograms

1, holography

Holography is a photographic method invented by dennis gabor. The photos printed by this photography method can be viewed from multiple angles, but there are angle restrictions. Many anti-counterfeiting signs are made of holographic images.

2. Holographic projection

The front projection holographic display can also be broadly regarded as a kind of holographic image, but the so-called holographic image is only projected on a transparent "holographic plate". Therefore, the so-called holographic image is just a plane rather than a three-dimensional image. This is the most widely used holographic technology.

3. Holographic images

Holographic display is still under study, which is a holographic image technology appearing in science fiction works. In order to create a physically pure three-dimensional image, the audience can observe and even enter the image from different angles without restriction.

The above contents refer to Baidu Encyclopedia-Holography.