0

I know I can buy a smart mirror already finished for around $80, but I think building one myself will be an interesting project.

That being said, I read somewhere (this may not have been a dependable source) that a two-way mirror should be used for this because it is transparent UNLESS an opaque black material is behind it, then it just looks like an actual mirror. Would a two-way mirror behave the way I explained above or should I use a different material for a smart mirror?

2
0

Yes, a two-way mirror works the way you explained.

In more detail, a mirror is a thin sheet of a reflective metal. This is usually supported by being attached to a piece of glass (and often protected by being covered on the back), but the actual mirror is the metal layer.

A two-way mirror reflects some proportion of the light, and lets the remainder through. If it is placed between a brightly lit room and a dark room, it looks transparent in the dark room (showing the light room), and reflective in the light room (also showing the light room).

If you put a two-way mirror over a display, the mirror will look reflective when the display is off, but show the the display (if it is bright enough) when it is on.

1
  • The contrast and color rendition of the display usually suffers quite a bit when behind the two way mirror film. I suspect getting a high quality film is the biggest challenge. – JPhi1618 Nov 25 '19 at 15:29

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.