I love going to the movies. Always have and always will. Since 3D movies have become all the rage I enjoy it even more now. 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. Every 3D image or movie you view uses this same principle but may go about it in a slightly different manner.
Anaglyph Stereo
Anaglyph used to be popular but suffers from 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 red or blue lenses filter out the corresponding image so each eye sees the different perspective. 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
Technological research has created new ways of displaying 3D imagery in the home. Polarized light stereoscopy, currently popular in cinemas, is now being made available in the home marketplace through the use of projectors. It's a very efficient way of creating 3D images as both images can now be displayed on the screen at the same time. 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. Silver screens reflect the light in such a manner as to ensure there is minimal depolarization for a crisper picture.
The polarized technique has some major advantages that will enable it to become the dominant method when prices finally do come down. Glasses are easier to manufacture and are lots cheaper and lighter than shutter glasses. You can also have a more widely dispersed audience as the 3D effect is viewable from more angles. The average pair of shutter glasses will darken the image by about 20%. You get a much brighter image with polarized lenses as they only block about 10% of the light.
The author loves technology and gadgets in general and enjoys sharing his passion online. If you're after more information on setting up your own home entertainment system check out his site at home theater 3d projector
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. Every 3D image or movie you view uses this same principle but may go about it in a slightly different manner.
Anaglyph Stereo
Anaglyph used to be popular but suffers from 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 red or blue lenses filter out the corresponding image so each eye sees the different perspective. 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
Technological research has created new ways of displaying 3D imagery in the home. Polarized light stereoscopy, currently popular in cinemas, is now being made available in the home marketplace through the use of projectors. It's a very efficient way of creating 3D images as both images can now be displayed on the screen at the same time. 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. Silver screens reflect the light in such a manner as to ensure there is minimal depolarization for a crisper picture.
The polarized technique has some major advantages that will enable it to become the dominant method when prices finally do come down. Glasses are easier to manufacture and are lots cheaper and lighter than shutter glasses. You can also have a more widely dispersed audience as the 3D effect is viewable from more angles. The average pair of shutter glasses will darken the image by about 20%. You get a much brighter image with polarized lenses as they only block about 10% of the light.
The author loves technology and gadgets in general and enjoys sharing his passion online. If you're after more information on setting up your own home entertainment system check out his site at home theater 3d projector
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This article has been written by the author, Eric James. Should you require anymore48" Drift Anchor please visit his Drift Anchor resources!
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