PASSIVE STEREO
Infitec
Infitec delivers superior stereo separation without ghosting, with full freedom of motion, independent of head tilt. Two optical Infitec filters split the color spectrum in 2 parts: one for the left and one for the right eye information.
Trans-Force attraction uses the latest stereo technology – Infitec™ based on completely new technique of Wavelength Multiplexing. It delivers superior stereo separation without ghosting, very homogeneous and serene images (like in high quality mono projection) with full freedom of motion, independent of head tilt. Infitec™ stereo display technology makes it possible for the user to produce large-sized pictures on every white projection surface without using special projection screens (silver screens).
Sometimes this technique is described as a «super-anaglyph» because it is an advanced form of spectral-multiplexing which is at the heart of the conventional anaglyph technique.
Benefits: Infitec stereo imaging works on every white screen. No need for special non depolarization screens (silver screens). By use of low gain screens stereo images become very homogeneous and very serene. Homogeneity is comparable to high quality mono projection. Very high channel separation (no ghost images at all).
Disadvantages: little distortion of colors
Price: medium (about 50 Euro)
Anaglyphic stereoglasses
These are based on the idea of splitting an image into 2 pictures by taking only the red colors of a picture for the left and the blue color for the right eye.
Benefits: low cost, easy to use.
Disadvantages: distortion of colors - left and right eye images have different colors, poor quality of stereoscopy.
Price: low
3D Polarized glasses
Polarized 3D glasses create the illusion of three-dimensional images by restricting the light that reaches each eye (linearly and circularly polarization). To present a stereoscopic motion picture, two images are projected superimposed onto the same screen through orthogonal polarizing filters. The viewer wears low-cost eyeglasses which also contain a pair of orthogonal polarizing filters. As each filter only passes light which is similarly polarized and blocks the orthogonally polarized light, each eye only sees one of the images, and the effect is achieved.
Benefits: relatively low cost for clear imaging and collective work opportunity in VR.
Disadvantages: the light reflected from a motion picture screen tends to lose a bit of its polarization, stereoscopic equipment occupies a lot of place, and special expensive silver screen is required.
Price: low
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