All Questions
9
questions
2
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0
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87
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Holograms as a superposition of many individual interference patterns
I've recently started reading about non-linear optics and holograms. While I do understand the basics of how holograms are made, by superposing the reference waveform on the object waveform over a ...
- 1,791
2
votes
1
answer
70
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Sampling theorem for in-line digital holography
In digital holography, the image sensor must have a sufficient pixel density. The book New Techniques in Digital Holography by Pascal Picart and others, the following condition is given:
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- 188
0
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0
answers
67
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Can we see "imaginary" light beams?
When a reference beam, R, interferes with an object beam, O, the interference pattern is captured by a holographic plate. When reconstructing the image, the reference beam is incident on the ...
- 77
0
votes
3
answers
889
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What information is lost when you view only a piece of broken hologram?
When a hologram is broken into pieces, you can still see the whole object from any piece of them, but I am wondering what information is lost in each of them, does the hologram images look the same ...
- 131
2
votes
2
answers
1k
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How is the virtual image reconstructed from a hologram?
To make a hologram a film is exposed to an incident plane wave and wave from the object to record the interference pattern on the film. The principle is commonly explained in a way like that in p.1212 ...
- 1,135
1
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0
answers
121
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How can an interference pattern encode both the angle of incidence and relative phase in a hologram?
For example - there are two "object" beams, both 180-degrees out of phase with the reference beam, which hit the recording plate at angles of incidence of 30-degrees and 90-degrees respectively. ...
- 981
1
vote
1
answer
201
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Holographic Image
In a holography set-up, as shown in the figure below, Illumination beam and reference beam both are in phase. The interference pattern generated at the detector contains the whole information about ...
- 611
0
votes
0
answers
113
views
Why do I get different colours in scratched holograms?
I was making a scratched holograms and in result got different colours instead of white hologram
- 121
1
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0
answers
50
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Why do 3D holograms need curved lines?
I'm making a scratched hologram and I'm interested in we have to make curved lines to get a 3D image.
- 121