There are three types of 3D eyeglasses that correspond to the three ways stereo frames are separated for 3D effects: anaglyph, polarized and active. For more about each method, see
Anaglyph 3D
Polarized 3D
Active 3D
Anaglyph 3D introduce.
A stereoscopic 3D display technology that separates the stereo frames by RGB colors. Dating back more than a hundred years, the anaglyph method has been used for photographs, a handful of films in theaters and 3D comic books. Anaglyph images can also be downloaded from the Web or created in the computer. The stereo frames are created with color filters in an anaglyph camera or by passing the original 2D frames through a 2D-to-3D converter. The corresponding filters in the viewer’s eyeglasses direct the left image to the left eye and the right image to the right eye. The most common glasses have a red left lens and cyan right lens. The red lens filters out the red, and the cyan lens filters out the blue and green. Red/green and red/blue colors are also used (see RGB).
Polarized 3D introduce.
Polarized 3D is also called “passive 3D,” because the glasses have no built-in electronics and do not perform any processing (contrast with active 3D). See 3D visualization, anaglyph 3D, lenticular 3D, parallax 3D and 3D glasses. A stereoscopic 3D display technology that separates the stereo frames by polarization. Using polarizer overlays, the movie projector or TV screen emits the left frame in a different polarization than the right frame, and the viewer wears polarized glasses to filter the frames to the appropriate eyes.
Active 3D introduce.
For gaming and active 3D TV sets, LCD lenses open and close in sync with the stereo frames. Accepting infrared (IR) signals beamed from the monitor, these are NVIDIA 3D Vision glasses. For ceiling-mounted movie projectors, radio frequency (RF) signals are used instead of IR.
