Polarizing Filters & Glasses

3D stereo achieved using polarizing filters over the projector lenses, and matching polarized glasses

Circular polarization:

Linear polarization:

Some sources for polarizing glasses are:

Projector filters

Linear polarizing filters can be bought from Reel 3-D, or photographics filters can be used (e.g. 72mm Hoya PL).

Circular filters can be bought from American Polarizer, or Edmund Optics.

Because of variations in projector design, a custom mount must usually be built. See the GeoWall site for info on some mounts that others have made.

Using mirrors can affect polarization - keep angle of reflection small.