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What kind of material would be best to block an IR camera?

Would Silicon work? (e.g the Silicon typically used in iPhone cases)

Rather than covering the object/subject, I'm interested in fully blocking the actual camera, so it is unable to receive any IR information.

Thanks!

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    $\begingroup$ you should state what wavelengths you are talking about. IR and cameras usually involve two completely different wavelength ranges, one is usually called NIR (near-IR, around 800-900 nm just near red) and the other is heat radiation, longer waves of maybe 1000-12000 nm. both are widely used for surveillance cameras although NIR is much more common and cheaper. $\endgroup$
    – BjornW
    Jul 25, 2013 at 23:51
  • $\begingroup$ I don't have access to the specific wavelength, but the IR device is technically considered a sensor, not a camera. $\endgroup$
    – user27516
    Jul 26, 2013 at 0:01
  • $\begingroup$ i think you have to be a bit more specific than that.. what's it used for? $\endgroup$
    – BjornW
    Jul 26, 2013 at 0:24
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    $\begingroup$ It's basically a motion sensor that functions in the dark - does that help? $\endgroup$
    – user27516
    Jul 26, 2013 at 0:54
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    $\begingroup$ @tpg2114 the goal is to stop an IR camera from receiving data. Motivation is to protect personal privacy. $\endgroup$
    – user27516
    Jul 26, 2013 at 4:06

4 Answers 4

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Regular acrylic (plexiglass) will block more infrared than glass. And there are new formulations specifically designed to block IR. There are also special IR blocking polycarbonate (bulletproof) materials as well.

Some examples:
- Acrylic: Optix LRB
- Polycarbonate: Lexan Solar Control IR

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Believe it or not, regular old glass that you would use in windows of a house or car absorbs infrared radiation. So if you hid behind a plate of glass, a camera would not pick up the IR signal.

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  • $\begingroup$ who would have thought! What about silicon though, or other materials? I'm looking to cover the IR sensor itself, rather than moving myself (or the subject) behind an object? $\endgroup$
    – user27516
    Jul 26, 2013 at 0:03
  • $\begingroup$ @user27516 I don't know about other materials -- but you could just cover the sensor with glass. $\endgroup$
    – tpg2114
    Jul 26, 2013 at 0:36
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Electrical tape is opaque to IR (and visible) light.

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How about water? Blocks IR insanely! Have a look at Wikipedia: EM-Absorption by Water for detailed information.

P.S.: Please consider formally accepting an answer.

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