XPAND 3D: Describes a 3D display process from the world market leader for so-called shutter glasses. Technique: Stereoscopy is based on the principle that each eye is shown a slightly different image. To do this, Xpand uses a shutter system in which the images for each eye are shown in quick succession.
The spectators wear electronic glasses whose LCD-Switch lenses between clear and opaque to only let the wearer see the right image for the right eye at the right time. an infraredSignal, which is broadcast into the auditorium, ensures that the glasses are synchronized.
Advantages: In contrast to systems with polarized light (like RealD) does not require XpanD silver screen. In contrast to other methods, there is no loss of quality in terms of color quality and brightness of the image compared to two-dimensional projection. When the viewer's head is tilted, there are no disadvantages for the 3D effect, which is the case with linear polarization gives.
Disadvantages: XpanD glasses are significantly more expensive than polarization filter glasses. Therefore, these are usually loaned out by the cinemas, cleaned after use and used several times. The cinemas have to factor in a certain loss due to theft or damage in the operating costs. The goggles are also slightly heavier than other systems.