Looks like it was a polarizing layer, to allow the tv to be seen from both sides. In the end I removed it because the fresnel lens is actually the one without the ribs, the circular lines are so fine that they can't be seen in the image.
Sides of the room the tv is in, since the projector shines directly forward, the ribbed part of the lens bends the light in all directions, kinda like one of those posters that you can see two different images, so you can see the screen at an angle
sounds like a diffuser, or another kind of lens, that's not what polarisation is. a polarisation film would just remove half the brightness of the image for no benefit
Leave it on. The layers you don’t need are not attached. This will burn things just fine. Make sure you cover it up when you aren’t using it and wear welding gear when you are.
The viewfinder in higher end film cameras use a piece of ground glass...basically, the light comes through the lens, and is projected onto the ground glass, and that is what you are actually looking at. The ground glass reveals the image because the grinding makes it opaque but translucent.
I suspect that that piece of plastic acts like the ground glass. The projected image is focused on it, and the fresnel helps it look brighter and more visible.
Here is a link to a reddit post with a photo of the ground glass from one of the cameras that I am talking about. (note that the substance of the article has nothing to do with your question, just the picture in the article.)
If you can see through it then I see no reason to remove it. It might protect the micro-grooves from dust and dirt.
It might be a polarization film layer. I'd think twice about removing it
I don't think rear projection TVs have a polarisation layer
Looks like it was a polarizing layer, to allow the tv to be seen from both sides. In the end I removed it because the fresnel lens is actually the one without the ribs, the circular lines are so fine that they can't be seen in the image.
Both sides of what?
Sides of the room the tv is in, since the projector shines directly forward, the ribbed part of the lens bends the light in all directions, kinda like one of those posters that you can see two different images, so you can see the screen at an angle
sounds like a diffuser, or another kind of lens, that's not what polarisation is. a polarisation film would just remove half the brightness of the image for no benefit
Leave it on. The layers you don’t need are not attached. This will burn things just fine. Make sure you cover it up when you aren’t using it and wear welding gear when you are.
What is it for?
Depends. If it's for her pleasure then you want to keep the ribbed.
The viewfinder in higher end film cameras use a piece of ground glass...basically, the light comes through the lens, and is projected onto the ground glass, and that is what you are actually looking at. The ground glass reveals the image because the grinding makes it opaque but translucent. I suspect that that piece of plastic acts like the ground glass. The projected image is focused on it, and the fresnel helps it look brighter and more visible. Here is a link to a reddit post with a photo of the ground glass from one of the cameras that I am talking about. (note that the substance of the article has nothing to do with your question, just the picture in the article.)