I don't show interest on photography because I don't have camera but I want to know the working of it.When I surfed on net I found out there is a 3D photography and further started to know about it.I also wonder Why our laptops don't have a 3D view.With the incessant improvement in the technology,till now no products were there to view a 3D display on the laptops and cellphones.Steve Jobs dream is to make a holographic display on the phone,but he expired.So I want to share the working of 3D photography.Take a look at the answer.
COHERENT LIGHT-Light waves are IN PHASE with each other.
A hologram is very much like a photograph, they both are recordings of light.But the differences is in the way of light is recorded make them worlds apart.Unlike photographs, holograms are not recordings of simply intensities of light, but also recordings of its phase distribution. In order to do that, holograms must be recorded with coherent light.If laser was not invented holography would not possible.Thanks to Theodore Maiman who invented laser.
When
light waves hit an object, it is reflected.refracted by
the surface of the object, changing the phase of the waves. Different objects
of different shapes will change the form of the waves differently, leaving a
distinct fingerprint,impression of the object onto the light waves.When you take a pic of the bullet train using the camera it will be blurry.Consider the light wave pic,it will be impossible to capture precisely.When
two waves come into contact,
they interfere with each other, the resulting interference pattern is called a standing wave.As long as the two light waves do not change,the standing wave will remain the same and this is recorded on the hologram.
A hologram is created by first splitting a laser beam into two. One is called the object beam and the other is called the reference beam. The object beam is shined at the object, which is then reflected and exposed to the film. The reference beam is exposed to the film without any change.At the film,the reference beam interferes with the object beam,creating an interference pattern,a standing wave, which is recorded onto the film.
When a hologram is viewed with a coherent light source, the original light waves are reconstructed, creating a 3D image in space. This 3D image can be viewed from different perspectives, as if the object is actually there. When viewed from the front, the front of the object can be seen, and when viewed from the side, the side of the object can be seen.
Most fascinatingly, when the hologram is cut apart, the image can still be viewed from panorama that are recorded onto each piece. By virtue of this, holograms can be viewed in different angles, holograms make a good space for data storage, providing means of storing mass amounts of data in different angles and maintaining data integrity even if the hologram is damaged.
People at MIT have been hard at work, since 1989, in creating a "Holovideo" set that could replace your TV some day, just like Star Wars!
PLEASE PROVIDE ME YOUR FEEDBACK AT
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| Holographic view of an IPHONE |
COHERENT LIGHT-Light waves are IN PHASE with each other.
 |
| Coherent wave |
A hologram is very much like a photograph, they both are recordings of light.But the differences is in the way of light is recorded make them worlds apart.Unlike photographs, holograms are not recordings of simply intensities of light, but also recordings of its phase distribution. In order to do that, holograms must be recorded with coherent light.If laser was not invented holography would not possible.Thanks to Theodore Maiman who invented laser.
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| Diagrammatic representation |
they interfere with each other, the resulting interference pattern is called a standing wave.As long as the two light waves do not change,the standing wave will remain the same and this is recorded on the hologram.
A hologram is created by first splitting a laser beam into two. One is called the object beam and the other is called the reference beam. The object beam is shined at the object, which is then reflected and exposed to the film. The reference beam is exposed to the film without any change.At the film,the reference beam interferes with the object beam,creating an interference pattern,a standing wave, which is recorded onto the film.
When a hologram is viewed with a coherent light source, the original light waves are reconstructed, creating a 3D image in space. This 3D image can be viewed from different perspectives, as if the object is actually there. When viewed from the front, the front of the object can be seen, and when viewed from the side, the side of the object can be seen.
Most fascinatingly, when the hologram is cut apart, the image can still be viewed from panorama that are recorded onto each piece. By virtue of this, holograms can be viewed in different angles, holograms make a good space for data storage, providing means of storing mass amounts of data in different angles and maintaining data integrity even if the hologram is damaged.
People at MIT have been hard at work, since 1989, in creating a "Holovideo" set that could replace your TV some day, just like Star Wars!
PLEASE PROVIDE ME YOUR FEEDBACK AT
fanaticphysics@gmail.com
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