You have two eyes that let you see the world in stereo. Because your eyes are about two inches apart, their perspectives are just a little different. That's why directors use dual-mounted cameras to film 3-D scenes. One camera captures images ultimately intended for your left eye; the other, for your right. After the movie is sent to your local theater, projectionists load the data into a server.
This computer sends the data in two parallel streams to the projector, which displays them, quickly alternating between images meant for your left and right eyes. Those images then strike the movie screen and bounce back to your glasses.
The glasses you wear are polarized filters, and the lens for each eye is calibrated to let in light waves that strike the lens at a specific angle. All others bounce away or are absorbed.
That means directors can purposely design 3-D effects for every aspect of their movies and project them in a way that makes sense to your eyes.
The 3-D systems from years ago didn't work very well. To understand exactly why, you have to know how light works. Light is a type of wave, and those waves move up and down and side to side and basically all over the place. Light is a bit chaotic. 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.
Keep in mind that not all Imax cinemas are capable of screening digital or 3D movies since they require different projectors. These passive 3D glasses use polarizing filters to allow each eye to see a slightly different image. You can learn more about the various 3D TV technologies here. The RealD 3D format is natively digital. 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. While passive 3D glasses are inexpensive, the projectors can be very pricey. As you can see, it all depends on your budget. It can be tempting to just unbox your TV and go, but there are definitely a few things worth considering. You might want to watch your 3D in a dark room to get that true movie theater experience, but this can often be a bad idea.
The simplest way to avoid this problem is to set a desk lamp up behind your TV and point it at the wall. Similarly, you might have been happy with your settings until you actually take a look at them and realize they could be so much better. The best thing to do would be to use a calibration medium, such as this Blu-Ray from Spears and Munsil Amazon. It provides great results and will show you how good your TV is. For example, games generally have adaptive 3D depth settings, while films generally remain static.
A lower depth intensity might allow you to get the most out of a game or film, although it might be a bit tedious to change it every time.
Watch this one minute video to know about the difference between active and passive 3D. Active Vs Passive 3D. Watch this video on YouTube. RealD movie theater 3D glasses. Many filmmakers rely on RealD 3D for their movies because RealD involves intriguing technologies like TrueImage, TrueMotion that allow filmmakers to present the movie the way they want without any flaws. But there are certain differences like the 3D glass size, projectors used in both the formats, audio quality, and picture quality as well.
Skip to content Sometimes, it may occur to many people how watching movies in the theatre feels so extraordinary than watching it on a regular TV screen.
What is RealD 3D? RealD 3D has a better viewing angle that allows the audience to tilt or turn their heads while watching the movie. The ghosting effect is negligible in RealD 3D movie formats. Projectors: IMAX theatre makes use of Christie 2K dual projector systems that offers 2X times resolution of p along with the bright and clear 3D images.
Audio: IMAX has undoubtedly the best sound system with pitch -perfect tuning and high accuracy.
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