Plastic Material for 8-15um IR transmittance

[arbyli]

I am trying to do IR(body heat) sensing through a plastic window(1mm thickness).
The electronics portion working well but all the "IR" windows I put in front of it pass so little energy that the unit is useless(Clear polycarbonate and PMMA).
The plastic window must be rigid and flame retarded.
Any suggestions on what I should be looking for?
Thanks and regards,

 

[cloa]

Someone did a thread a bit like yours

http://www.eng-tips.com/viewthread.cfm?qid=280328&page=1

I think if you follow similar advice you will probably need to choose a non-polymer.

 

[TomWehrmeyer]

We use a remote IR sensor that has a removable plastic dome. This detects IR from a handheld remote control at 850nM. The manufacture of the unit is Pedoka. They should be willing to send you a sample receiver from which you can salvage the plastic.

 

[GrumpyPlasticBastard]

Bayer Chemical has special infrared-transparent polymers.

----
BFL Dreamworks
"If we don't have an answer we'll get one"

 

[Demon3]

Here's something I found on IR transparent films.

http://www.allbusiness.com/company-activities-management/operations-customer/6135818-1.html

Your requirement to have it flame retardant is likely to make the goal hard or even impossible as the flame retardant additive will also block IR.

Chris DeArmitt PhD FRSC CChem

http://www.phantomplastics.com

Consultant to the plastics industry