by Andy Woods
Going to the movies is one of my favorite things to do. I probably always will. Now that we have 3D movies I'm like a little kid in a candy store. You don't have to twist my arm to get me to experience the joys of a well made 3D experience. Having four little girls who enjoy a 3D movie as much as I do gives me the perfect excuse to see all the latest CGI animations coming out. 3D movies work by making sure each eye sees a different image to the other, both taken from a slightly different perspective.
As each eye perceives the world from a slightly different perspective due to them being about 2 inches apart this effectively mimics the way we see the real world and creates a more realistic 3D image on a 2D screen. Every 3D image or movie you view uses this same principle but may go about it in a slightly different manner.
Once a popular method anaglyph is now more of a novelty due to its poor picture quality. In case you don't know the term anaglyph refers to the red and blue glasses which are usually made out of cardboard. The images for each eye have either a red or blue tint. The glasses filter out the correspondingly colored image so each eye sees a separate image. This works to a degree but the colors are somewhat muted so you wouldn't want to watch a top notch feature length movie with them.
Alternate-frame sequencing is the technical term coined for active shutter glasses. Each image is shown alternately on the screen. When an eye is not supposed to see the image it is blocked by the shutter over that eye going dark. When the technology was fairly new many people complained of a visible flickering in the image. It's for this reason that a TV needs to be have a refresh frequency of 120Hz or higher to double the frame rate of the animation on screen. Most new models of TVs and projectors being manufactured today are capable of this higher frequency.
Using active shutter glasses can have its downsides. A disadvantage is that you either need to be tethered to a box with a cable or you need to buy batteries for glasses that operate remotely. If you are blessed with a large family you are either going to create a jungle of cables or you will have a rather large expense for batteries. The major advantage is that the technology has been around for a while now and projectors and TVs using this method are relatively cheap. This is excellent if you only need one or two pairs of glasses.
Technological research has created new ways of displaying 3D imagery in the home. One such system uses polarized light for projecting images onto a screen and it is now possible to display both images on the screen simultaneously. Special polarized lenses in the glasses are polarized to only let in the correct image while blocking the other.
The major disadvantage of this method is the cost. It's new technology so prices are still quite high. Another disadvantage is that you will need to buy a silver screen to get the best viewing experience. Silver screens make sure the light reaching your eyes remains polarized so the picture retains its quality.
The polarized technique has some major advantages that will enable it to become the dominant method when prices finally do come down. The glasses don't require batteries, are cheaper and also lighter than active shutter glasses. You can also have a more widely dispersed audience as the 3D effect is viewable from more angles. Shutter glasses also have a tendency to darken the image by about 20%. Polarized glasses can reduce this to about 10%.
David Woods is a big fan of latest TV and laptops, check out his reviews for <a href="http://bestplasmatvreviews.org/category/samsung-plasma-tv/">Samsung plasma TV</a> and <a href="http://latestcheaplaptopsforsale.com/macbook-vs-macbook-pro/">Macbook Pro Review</a>.
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New Unique Article!
Title: Do You Want to Watch 3D Cinema At Home
Author: Andy Woods
Email: donbukriv@gmail.com
Keywords: tv shows,movies,family,home,recreation,relaxation,entertainment,plasma tv,television
Word Count: 635
Category: Hobbies
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