How to cancel a split image - is it actually possible?

In summary: This would only be true if you were using vector addition of light waves. This is not possible without the sort of stability that's needed to make holograms.
  • #1
tarius
3
0
Hi all,

A question: Is it possible to split a single image then use the two identical images to cancel each other resulting in a canceled 'image'? If so, can anyone suggest a simple optical method that can be used to achieve this in real-time? Perhaps creating an anti-phase of the original image and combining them optically? Thanks.
 
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  • #2
Can you clarify what you mean by image. Are you talking about a projected image onto a screen?

You can "cancel" or destructively interfere with a grating. When polarized light reaches the grating an out of phase image is stimulated by the conductive bands in the grating causing the resulting combined amplitude of the light measured anywhere beyond the grating to be close to zero. Blackness.

This is the technology behind 3D glasses, so that they can cancel the image in one eye.
 
  • #3
For a projected image, a second image could be projected at the same screen to turn the combined image into some shade of grey or white.
 
  • #4
rcgldr said:
For a projected image, a second image could be projected at the same screen to turn the combined image into some shade of grey or white.

Actually it would be black. An out of phase image with equal magnitude and frequency would be no light at all. A grating at the lens would produce a very accurate out of phase image.
 
  • #5
LostConjugate said:
Can you clarify what you mean by image. Are you talking about a projected image onto a screen?

You can "cancel" or destructively interfere with a grating. When polarized light reaches the grating an out of phase image is stimulated by the conductive bands in the grating causing the resulting combined amplitude of the light measured anywhere beyond the grating to be close to zero. Blackness.

This is the technology behind 3D glasses, so that they can cancel the image in one eye.

For example, in a classic pin-hole camera, would it be possible to cancel the image of a person's face (the image projected at the back of the camera box) ? If so, any ideas how? Thanks.
 
  • #6
rcgldr said:
For a projected image, a second image could be projected at the same screen to turn the combined image into some shade of grey or white.

Okay. A test scenario would be the classic pin-hole camera where a face is the incoming image. I was wondering how one can get and project the out of phase version of the image to create the canceled (zero image effect).
 
  • #7
LostConjugate said:
Actually it would be black. An out of phase image with equal magnitude and frequency would be no light at all. A grating at the lens would produce a very accurate out of phase image.

This would only be true if you were using vector addition of light waves. This is not possible without the sort of stability that's needed to make holograms.
The proposal, as far as I can see, is to project an additional 'negative' image (in terms of intensity) so that the two images merge to produce uniform illumination at, as was said, half brightness.
 

FAQ: How to cancel a split image - is it actually possible?

1. Can a split image be cancelled using technology?

No, a split image cannot be cancelled using technology. Split images are a natural phenomenon that occur due to the way our eyes perceive light. Technology cannot alter this process.

2. Is it possible to train the brain to cancel a split image?

There is no scientific evidence to suggest that the brain can be trained to cancel a split image. Our brains are wired to interpret visual information in a certain way, and it is not possible to consciously change this process.

3. Do certain eye exercises help in canceling split images?

No, there is no evidence to support the claim that eye exercises can help in canceling split images. Split images are a result of how our eyes and brain work together, and no amount of eye exercises can change this.

4. Can wearing special glasses or lenses help in canceling split images?

No, wearing special glasses or lenses cannot cancel split images. These optical tools may help improve overall vision, but they cannot alter the natural phenomenon of split images.

5. Do some individuals have the ability to cancel split images naturally?

No, there is no scientific evidence to support the idea that some individuals have the natural ability to cancel split images. Split images are a common occurrence in all individuals and cannot be voluntarily controlled.

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