Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It's 100% free.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

The glasses that we use for 3D viewing, do they allow infrared light to pass through them? Infrared rays pass through normal glass right? I need the pupil illuminated through infrared LEDs so I need to whether infrared light can pass through each and every kind of glass.

share|cite|improve this question
if it's a polariser based glasses, then no.. IR rays are blocked by polariser as are visible rays.. – Vineet Menon Jun 15 '12 at 5:07
Active Shutter Glass is used for 3D viewing. if it is polariser based glass then visible light would also not pass through it and how would a person look through it?? – siddharth Jun 15 '12 at 5:18
the projection is based that way...2 cross polarised projectors are used to project different images on screen and the glasses would selectively allow only one of them to pass thru.. I would suggest you to go thru the wiki article.. – Vineet Menon Jun 15 '12 at 5:20
From where did you get information that infrared rays are blocked by polarized glasses? Can you give a reference link or something. – siddharth Jun 17 '12 at 6:32
that I assumed from the fact that IR rays are actually non-ionizing EM waves exactly like light and polarizers actually work for any EM waves( non-ionizing). Thus, inferred...Actually if goes down to the working of polarizers, they don't allow a particular orientation of electric field..if you want a link, just search for IR polarizers in google. – Vineet Menon Jun 18 '12 at 4:39

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.