Projecting an image onto a mirror

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Discussion Overview

The discussion revolves around the challenge of projecting a clear image onto a mirror while maintaining its functionality as a regular mirror when the projector is not in use. Participants explore various solutions, including coatings, alternative surfaces, and technological approaches.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires about possible coatings for mirrors that would allow for image projection while retaining mirror functionality.
  • Another suggests using a portable screen or sheet as an alternative to coatings.
  • A participant notes that a surface with high diffuse reflection might not perform well as a mirror, indicating a trade-off between projection quality and mirror functionality.
  • A link to a smart glass solution is provided, which integrates smart glass technology with mirrors.
  • Some participants express skepticism about the affordability of smart glass solutions, questioning whether they can be considered "cheap."
  • One participant proposes using a Pepper's Ghost arrangement, suggesting it as an impressive but older technique for achieving the desired effect.
  • Another participant suggests that a pull-down projection screen above the mirror or a large sheet of white paper could be more effective and economical than smart glass options.
  • A different approach is mentioned, involving a large TV monitor array with a camera, which could serve as a mirror alternative but is noted as not being a cheap solution.

Areas of Agreement / Disagreement

Participants do not reach a consensus on a specific solution, with multiple competing views and suggestions presented throughout the discussion.

Contextual Notes

Participants express uncertainty regarding the cost-effectiveness of various solutions, and there are unresolved considerations about the performance trade-offs between projection quality and mirror functionality.

Who May Find This Useful

Individuals interested in innovative projection techniques, smart glass technology, or practical solutions for combining mirror and projection functionalities may find this discussion relevant.

jjddd
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I need to do something for a project. Basically, I need to be able to project a clear image onto a mirror while still being able to use the mirror when the projector is not in use. Is there a way to do this/a cheap coating I can put on a mirror to accomplish this?
Thank you!
 
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I don't know of any coatings, but perhaps some sort of portable screen or a sheet?
 
You would need a surface with a relatively high proportion of diffuse reflection in order to project an image on top of it. This will most likely result in it working rather poorly as a normal mirror.
 
Ah yes, I should have guessed that existed as I was looking up smart glass solutions not so long ago (it seems to be simply integrating a smart glass with a mirror). However, I do not know if this qualifies as "cheap".
 
Could you do something with lighting and a Pepper's Ghost arrangement? Old but impressive in some circs.
 
Orodruin said:
Ah yes, I should have guessed that existed as I was looking up smart glass solutions not so long ago (it seems to be simply integrating a smart glass with a mirror). However, I do not know if this qualifies as "cheap".
I guess it is an expensive crappy mirror and crappy screen. It is cheaper and more effective to keep the mirror and install a pull-down projection screen above the mirror. Or simply stick a big sheet of white paper to the mirror with some tape, when it is needed for projection.
 
You could do away with the mirror completely and use a large TV monitor array with a camera at the centre. In mirror mode, the camera would be the picture source. I see women using their smart phones in this way (in their cars on the way to work) and they don't need to carry a makeup mirror.
Unfortunately, not a 'cheap solution".
 

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