You will indeed need two pairs of glasses; the light that comes out the back is merely plane polarised.
Of course, this does mean that you can vandalise a pair of RealD 3D glasses into a plane polarising pair by flipping both the filters and rotating one of them 90 degrees :)
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Date: 2010-07-09 07:27 am (UTC)Of course, this does mean that you can vandalise a pair of RealD 3D glasses into a plane polarising pair by flipping both the filters and rotating one of them 90 degrees :)