3D Without Glasses - 3D Technology
How 3D Technology Works
The Basics of 3D Technology
3D technology is a very simple process in nature. Basically, to create a 3D film, two images must be superimposed together on the same screen. This is done by sending each image through a polarizing filter and then projecting it on the screen. Currently eye glasses are needed to view the 3D image.
The eye glasses are a vital part in 3D technology. Each side of the glasses contains a different polarizing filter which only receives one of the two images on the screen. Therefore, when watching a 3D film, your eyes will receive the same image, but from two different filters - or perspectives. And this is what gives the illusion of depth and 3D.
3D technology has taken a great step forward in recent years, with such films as Avatar and How to Train Your Dragon. A new 3D technology called 'RealD' simplifies the process by having a polarizing filter placed in front of the lens which can switch polarities 144 times per second. Therefore, with RealD 3D technology, only one projector is needed.
Different 3D Glasses and Technology
There are many different 3D technologies which have been developed over the years. They are:
- Polarized 3D Glasses. See above.
- Eclipsed Method. In this method a shutter blocks light to one of the eyes, when the other image is displayed on screen. Then the image alternates, and the light is blocked from other eye. This happens many times a second, and creates a 3D image.
- Interference Filter Technology. This is the classic 3D technology. Using different wave lengths of color for each eye, the brain perceives two similar, but different, 3D images. This eliminates the need for a polarizing screen, but makes more expensive glasses necessary.
3D Technology - 3D Without Glasses
Is 3D Without Glasses Possible?
Yes 3D without glasses is very much possible. Actually the way your eyes, and brain, are set up, it's almost like it supposed to be used for 3D. What happens is that your eyes receive separate variation of the same image (due to the difference in how the iris, the angle of the eyes, and many other aspects). When this happens the brain has to meld the two images together to make a single picture for you to see. Many times, like with 3D technology, the separate images fools your brain into thinking there is depth and a 3D image.
Many of the principals of 3D technology without glasses uses this principal. Also many 3D perceptions are used by the illusion of movement. This 3D technology is called motion parallax. Its the different movements of objects in the foreground and the background. Think about when you walk away from something, certain objects get closer and certain objects get farther away. Motion parallax basically simulates that and created a 3D illusion.
3D Without Glasses - 3D T.V
The most practical use of this 3D without glasses technology is with television. It's every home viewers dream to have be able to sit on their own couch and watch a movie in 3D HD - without wearing any glasses. Amazingly that technology has already been created and the dream is very much about to become a reality. There are three different TV technologies which emphasize 3D with and without glasses.
Lenticular Viewing: This 3D without glasses technology is available today. What happens is that the TV projects two different images that are picked up by the right eye and the left eye - without having to wear any glasses. The only downfall - and why this 3D technology will never last on the market - is that one has to sit in a very specific spot in front of the TV. This means this 3D technology is only suitable for one person.
Passive Glass Systems: The same technology we use at the movie theater. Using polarizing lens, and GLASSES, the eyes receive two different images which emulate 3D. These TVs are available today, but aren't likely to be popular.
Active Glass System: This is the same as the passive except that instead of the TV created in the 3D image, it's the glasses which do all the work. This means that the movie, show, or whatever that is being watch can be watched in 2D and then, with the flick of the button - and the put on of the glasses - can be watched in 3D. The downside is that the glasses would be upwards of one hundred dollars.
Panel System: This is the most likely use of 3D without glasses. What happens is that a thin screen is placed in front of the TV which as the same function as glasses would. It polarizes the images and causes the right and left eye to receive different images. This would create a 3D effect without any glasses at all.
Camera 3D: This is the most innovative 3D without glasses technology. The TV has a camera on the front which is set to follow the viewer where ever he, or she, goes. What this allows is more dynamic lenticular viewing. By knowing exactly where a person is in space the TV can project a 3D image at all times - without any glasses. It's amazing. It's simple. It's genius.
Cylinder Method: A technology in the TV separates the 3D image into two pieces which are received by opposite eyes. Also two cameras are on the top of the screen which follow the user around and allow the 3D image to be projected at all times.
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The Future of 3D Technology
The future of 3D technology looks brights. The most notable 3D product coming out in the next year is the 3DS, a hand held system from Nintendo which promises to display a 3D image without glasses. Initial reaction to the system is good, and the it seems to be using Lenticular viewing. This means that the DS has to be held at a certain distance and can't be moved wildly in either direction. This could be seen as gimmicky to some, so the success of the product is still up in the air.
Many TVs are starting to come on the market, with many new ones becoming available over the year. In gaming the Nintendo 3DS looks to be the flagship; it already has announced that it will have games such as Ocarina of Time, Star Fox, and other classics - all in 3D.
But the question now remains: