IR Transparent Projection Screen?

[Philmac]

Hello,

Is there such a thing as a projection screen that is transparent to IR? I need to project an image onto a screen (rear-projection), but I also need to send an IR signal through the screen from the side of the human user back to the side with the projector. I think there are metals/metalloids with this property, but those materials obviously don't make good projection screens. Any ideas?

Thanks,
Phil

 

[NobodySpecial]

If you are rear projecting you need a transparent screen anyway - something like frosted glass or plastic

IR remotes are generally around 780-820nm so only 'slightly-infra' red, pretty much anything that transmits red light will also transmit theis level of IR

 

[Philmac]

If you are rear projecting you need a transparent screen anyway - something like frosted glass or plastic

IR remotes are generally around 780-820nm so only 'slightly-infra' red, pretty much anything that transmits red light will also transmit theis level of IR

I have been informed that the wavelength emitted by the IR LEDs is approximately 950 nm. Does this change things? I would prefer not to let red through if possible.

 

[starley]

I have been looking around for that and am going to order samples of a transparent screen here http://www.ssidisplays.com/products/projection-screens/rear/intrigue
Good luck