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Stanley514
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How could we see a hologram created by lasers if laser beams do not get in our eyes (it could be dangerous)?
I thought that laser hologram is created by pure laser beam in pure air.you see the scattered light which has much lower power.
Stanley514 said:I thought that laser hologram is created by pure laser beam in pure air.
Light could be scattered only from some material object?
We can see a laser hologram because it utilizes light to create a three-dimensional image that appears to be floating in space. This is achieved by using a laser to illuminate a holographic plate or film, which then diffracts the light to create the illusion of depth and perspective.
A laser hologram works by using a technique called holography, which combines laser light and interference patterns to create a 3D image. A laser beam is split into two, with one part being directed onto the object and the other part being directed onto a holographic plate or film. The two beams then intersect, creating an interference pattern that is recorded on the plate or film. When the plate or film is illuminated with a laser, the recorded interference pattern diffracts the light to create a 3D image.
Laser holograms are different from regular images because they capture not only the intensity of light, but also the phase information. This allows for the creation of a 3D image that appears to have depth and perspective, unlike regular images which are flat and lack dimension.
No, laser holograms require a specific type of laser called a coherent light source. This means that the light waves emitted by the laser are all in phase with each other, allowing for the creation of the necessary interference pattern. Regular light sources, such as a light bulb, do not produce coherent light and therefore cannot be used to create a hologram.
Laser holograms have a variety of practical applications, including use in security features on credit cards and IDs, as well as in art and entertainment industries for creating 3D images and videos. They are also used in scientific and medical fields for creating 3D models of microscopic structures and for holographic microscopy techniques.