Is there different 3D in Cinemas?

[Freakbro]

I just assumed that all cinema 3D was the same specification passive polarised light type of 3D, but recently I have been to a couple of different Imaxs and was able to keep their 3D glasses - a little bit posher and more comfortable than the standard cinema ones.

So I took these to the last 3D movie I watched at my local cinema and they didn't work for either of us - everything was still just a double image

So I had to go and get a couple of the standard ones and they were fine.

I haven't heard anything about different types of 3D in cinemas and I am sure I have used a pair of previous Imax glasses in regular cinema before with no problems, anyone know about this?

 

[Freakbro]

Thanks for the replies - it must be the linear and circular polarisation that was the difference.

And I've been to Imax's that do have bins to put your glasses in and ones that let you keep them.