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Anonymous
Mirror doubles image from OLED display 2017-08-02 08:56:01 Post No. 1220797
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Mirror doubles image from OLED display 2017-08-02 08:56:01 Post No. 1220797
[Report] Image search: [Google]
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Hey, /diy/.
I need a small piece of mirror to reflect image from display. Problem is, thinnest mirror I found (about 1mm, cheap decorative mirror) is doubling image, when looked from angle. I read out that any thick mirror does this, and, fair enough, my mirror in bathroom had same, and even worse, effect. How do I prevent mirror from doubling image? Do I have to find even thinner mirror? Or can I file back side of mirror, and then re-apply whatever was there? Or, maybe, some acrylic mirrors doesn't have that problem?
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>>1220797
The reason you get two images is because there are two layers reflecting the image.
A mirror is some reflective surface like silver or aluminium maybe I don't know I'm not a chemist but if it was left out in the air it would oxidize which is just rusting basically except rust is only things with iron in like steel. Oxidised silver isn't reflective so its a shit mirror.
So what happens is they put glass in a vacuum chamber and microwave a block of silver so it turns into a gas and sticks to the glass. Because the glass stops the air getting to the silver it stays shiny.
A thinner mirror will make the images closer together but won't get rid of them exactly, I'm not sure about plastic mirrors but I think maybe of you can get a material that is the same refractive index as air it might work? I think? Fuck.
But what you can do is get a 'mirror' where the back side is used and instead of silver it's coated with something that doesn't tarnish so stays shiny, but you buy them from science shops and they are expensive and sometimes a funny colour.
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You need a first surface mirror. IE the reflection doesn't go through the glass. There are first surface mirrors in old laser printers, scanners, copiers, etc
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>>1220797
Gah...
What you are looking for is called a first-surface mirror.
The reflection/refraction/ you are getting is 1) from the glass surface and 2) from the mirrored surface behind the glass.
First surface mirrors are hard to find and really easy to scratch. Might check an old overhead projector or scrapped projection TV.
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Tear open an old hard drive and use one of the platters.
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Why not just place an anti-glare coating or surface on the glass surface of an ordinary mirror?
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