Does IR remote work through acrylic glass

acrylic

My little kid likes to press buttons too much, so I'd like to protect a shelf with my HiFi equipment with a door from acrylic glass (PMMA).
My only concern is: Would I be able to practically use IR remote when the sensors are behind acrylic glass?

I've found this information on Wikipedia:

PMMA passes infrared light of up to 2,800 nm and blocks IR of longer wavelengths up to 25,000 nm. Colored PMMA varieties allow specific IR wavelengths to pass while blocking visible light (for remote control or heat sensor applications, for example).

Does it mean that plain transparent PMMA will pass beam from IR remote or I need some special coloured variation?
I don't know what is the typical wavelength or IR remotes and I don't have any spare acrylic glass pane to just try it.

Best Answer

Here's a search result from ePlastics, a reliable plastics manufacturer (companies I have worked for have bought from them repeatedly).

Infrared transmitting (IRT) sheet was specifically formulated for projects requiring ultraviolet (UV) and visible light blockage while allowing infrared (IR) transmission starting about 750nm. The physical properties of this product are the same as standard extruded sheet and thus the same fabrication techniques apply. What makes this product special is its ability to transmit light in the IR region. We stock this in 0.060" and 0.118".

Note: All plexiglass sheet is infrared transmitting. This grade is opaque to visible light and allows infrared light through. Unlike glass, you can put all grades of plexiglass in front of DVR's, cable boxes, DVD players, etc. and your remote control, wireless router, etc. will still work. This particular acrylic material is black and only transmits infrared, which makes it ideal for hiding a CCD video camera.

While it's probably not safe to say that all acrylics transmit all frequencies of IR light, based on this I would say it's safe to say that most acrylics (and Plexiglas brand specifically) would allow transmission of remote control signals.

The particular result above is for a plastic that is opaque to visible light, but if you're looking for clear, you could probably call them and verify that the clear versions transmit IR light, even if you're not going to buy from them.

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