A trip to the big screen is something I always look forward to. Always have and always will. The new 3D movies have put an even greater level of enjoyment to my trips to the theater. I don't need much excuse to go and experience the wonders of the fantastic new effects that 3D promises. Fortunately I have four little girls who also like an outing to the movie theater and enjoy a good 3D film as much as the next person and not just movies made for girls either.
3D works by making sure each eye sees a slightly different picture than the other with each image representing the perspective of each eye.
Because our eyes are separated slightly they each see the world from a different perspective. 3D movies mimic this effect thus giving the illusion of depth on a 2D screen. All 3D images are created this way but there are two or three different methods used to achieve the effect.
Anaglyph Stereo
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. Each separate image is made up of either a red or blue tint. Your eyes have the corresponding image filtered out by the colored lenses thus allowing each eye to see only one image each. 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.
Active Shutter Glasses Stereoscopy
Active shutter glasses use a method that is technically known as alternate-frame sequencing. Each eye has its view blocked by the lens going dark when the image that it is not supposed to be seeing is on the screen. This is the reason a TV needs to be capable of at least a frequency of 120Hz. Divide this by two and you have the required 60Hz for each eye that is needed for smooth animation. Even higher frequencies can ensure a flicker free experience for the vast majority of viewers. These higher frequencies are becoming the default standard of new model TVs and projectors.
Using active shutter glasses can have its downsides. The major disadvantage is that the glasses require power either through a cord or from batteries. When you have a large family that can add up to quite a mess of cables or quite a lot of batteries. As they have been around for a while now prices for active shutter glasses and the TVs that use them have greatly reduced in price. If you only need one or two pairs of glasses then this would be the way to go.
Polarized Light Stereoscopy
As technology is always evolving new techniques for displaying 3D imagery are coming onto the market. 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. The images are projected so you will also need to buy a silver screen to get the best effect. A silver screen is needed to keep the light polarized so the image remains crisp and clear.
I believe polarized light stereoscopy will become the dominant method of 3D in the home eventually as costs decrease over time. The glasses don't require batteries, are cheaper and also lighter than active shutter glasses. Your audience can be larger and more spread out due to the large viewing angles that polarized stereoscopy provides. The average pair of shutter glasses will darken the image by about 20%. Polarized lenses give you a much brighter image by only blocking out about 10%.
The author loves electronic gadgets and loves writing about his passion. You can find more information on home entertainment technology on his site at 3D projectors for the home theater
3D works by making sure each eye sees a slightly different picture than the other with each image representing the perspective of each eye.
Because our eyes are separated slightly they each see the world from a different perspective. 3D movies mimic this effect thus giving the illusion of depth on a 2D screen. All 3D images are created this way but there are two or three different methods used to achieve the effect.
Anaglyph Stereo
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. Each separate image is made up of either a red or blue tint. Your eyes have the corresponding image filtered out by the colored lenses thus allowing each eye to see only one image each. 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.
Active Shutter Glasses Stereoscopy
Active shutter glasses use a method that is technically known as alternate-frame sequencing. Each eye has its view blocked by the lens going dark when the image that it is not supposed to be seeing is on the screen. This is the reason a TV needs to be capable of at least a frequency of 120Hz. Divide this by two and you have the required 60Hz for each eye that is needed for smooth animation. Even higher frequencies can ensure a flicker free experience for the vast majority of viewers. These higher frequencies are becoming the default standard of new model TVs and projectors.
Using active shutter glasses can have its downsides. The major disadvantage is that the glasses require power either through a cord or from batteries. When you have a large family that can add up to quite a mess of cables or quite a lot of batteries. As they have been around for a while now prices for active shutter glasses and the TVs that use them have greatly reduced in price. If you only need one or two pairs of glasses then this would be the way to go.
Polarized Light Stereoscopy
As technology is always evolving new techniques for displaying 3D imagery are coming onto the market. 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. The images are projected so you will also need to buy a silver screen to get the best effect. A silver screen is needed to keep the light polarized so the image remains crisp and clear.
I believe polarized light stereoscopy will become the dominant method of 3D in the home eventually as costs decrease over time. The glasses don't require batteries, are cheaper and also lighter than active shutter glasses. Your audience can be larger and more spread out due to the large viewing angles that polarized stereoscopy provides. The average pair of shutter glasses will darken the image by about 20%. Polarized lenses give you a much brighter image by only blocking out about 10%.
The author loves electronic gadgets and loves writing about his passion. You can find more information on home entertainment technology on his site at 3D projectors for the home theater
About the Author:
This article has been written by the author, Eric James. Should you require anymoreEscape 3Dplease visit his Escape 3D: The Jail resources!
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