The rotating filter wheel assembly installed in the projector simply retracts to showcase 2-D movie presentations. Her diverse work experiences include projects in the Philippines, Korea and United States. For more than six years she has written about films, travel, food, fashion, culture and other topics on websites including Yahoo!
She also co-wrote a book about Asian cinema. IMAX has been in the business since the year known for its innovation in making stadium seating movie experience highly immersive.
As per the exploration, there are a total of 1, IMAX theatres working in 80 different territories around the globe. There will be more upcoming IMAX theatres in the near future. Real D is an American company that docked in to introduce the established technology of 3D cinema in the world. Real D 3D delivers an astounding and highly immersive movie-watching experience to their audience.
They successfully create a lifelike effect in the eyes of the audience by adding depth that literally makes the audience feel they have stepped into the movie themselves. RealD 3D is the widest 3D cinema platform in the world where 26, theatres are installed in 72 different territories worldwide. RealD has two unique formats for Cinema i.
This means that movies have to be produced in a digital 3D format for projection on film-less digital projectors. RealD cinemas also use the passive circular polarizing technique to achieve 3D which allows viewers a clear image even when turning or tilting their heads. Imax Digital 3D: This is a similar format that also uses polarizing glasses. Imax Digital 3D is an evolutionary improvement of analog Imax 3D theaters that have been around since Its long history is evident even in the much newer Imax Digital 3D theaters since they still utilize the linear polarizing technology of its analog predecessors.
Unlike RealD, Imax 3D movies are less tolerant of head movements. A polarizing filter blocks many light waves but allows those moving in a direction parallel to the filter to pass through. In other words, a polarizing filter cuts down on visual noise. This is readily apparent if you take a pair of polarized sunglasses and rotate them while looking at a bright surface with a lot of shiny, reflected light.
At the right angle, the glasses will block much of the glare and make the scene easier on your eyes. Engineers can make eyeglasses with lenses polarized differently for each eye.
That is, one lens blocks certain light waves and the other blocks a different set of light waves. That's ultimately how 3-D theater technology works. And we've come a long way since the early days. Old-school 3-D projection technology was a headache, literally, for both theater owners and for many viewers. For starters, these antiquated systems required not one, but two projectors, which cast two different linearly polarized images onto the screen from 45 degrees left and right of center.
Viewers wore linearly polarized glasses, which had to rest at a precise angle in other words, straight on and stationary with respect to the screen in order to present crisp images.
Thanks to the glasses, your right eye saw only images from the right projector. Your left eye saw images only from the left projector. It sounds workable in theory, but if you tilted your head, you'd see colors bleeding into each other and stomach-churning, distorted images that gave many movie-goers headaches.
Other problems arose if the angle of the projectors was off even slightly, the images weren't perfectly synchronized or if they weren't exactly the same brightness. It was an altogether frustrating experience for projectionists and audiences. Linear polarization has gone by the wayside. If you've been to a 3-D movie in the past few years and slipped on those fashion-challenged glasses, you've worn lenses featuring circular polarization.
Just as with glasses that use linear polarization, those with circular polarization are made to filter out specific wavelengths of light. The big difference is that the polarized light waves don't travel in a straight line. Instead, they move forward in a spiral. To create that spiral effect, a projection system like the one in RealD might use two projectors with different polarizing filters: one to create a clockwise spiral; the other, a counter-clockwise spiral.
Each spiral works with only one lens on your glasses, so each eye sees just one set of images. But these dual systems tend to be too unwieldy or pricey for many theaters. Instead, RealD uses a sophisticated one-projector scheme. The projector sends its images through a polarizing beam splitter, which divides the light into two beams.
Both beams of light bounce from a mirror toward an achromatic polarization rotator , which rotates these beams of light to specific angles for each lens on your 3-D glasses. Images then pass through the ZScreen, which is a liquid-crystal screen placed in front of the projector lens. The ZScreen acts as a fast-switching polarizing filter also called a push-pull modulator.
Each time it switches, it alternates between images meant for your left and right eyes. It syncs precisely with the movie projector thanks to the help of an electronic controller. It does this task at frames per second, or 72 per second for each eye.
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