Saturday, March 19, 2011

A Look At Active vs Passive 3D

By Paul Barlow


The advancement in technical knowhow has resulted in the improvement of almost everything that we need in our lives. It seems that the most improvement is in the field of image display. Though there are different technologies used to display images, active and passive 3D technologies are, by far, the most popular. Though both the technologies use the same basic principles, there are quite a few differences between them. In some ways, they are similar.

Active 3D is typically faster than passive 3D. This is because it alternates rapidly between the left and right eye, within the same space. This motion is really fast and requires that you wear special glasses to be able to properly view images that are under its influence. The lens of these special glasses are designed to turn from opaque, to translucent, to transparent. This continuous change occurs in sync with image transformation. What this means is that the image on the left side will only be displayed when the left lens is transparent and the right lens is opaque, and vice versa.

In order to ensure that the special glasses are effective, you need to ensure that your hardware is proper so that it can be recognized by the special glasses to facilitate proper transformation of images. Using infrared emitters will ensure compatibility between your hardware and the special glasses.

However, passive 3D makes sure the picture is seen with left eye and right eye at the same time. Special glasses are worn to make sure the right eye looks at each picture. The special glasses in this situation also cut off any picture that is not meant for the other eye.

It appears as though active 3D is becoming popular among a lot of television manufacturers. There are already a number of plasma and LCD televisions with 3D capability on the market today. Many television manufacturers consider active 3D to be the mainstream version of 3D television.

When it comes to image viewing, you will find that shutter glasses that are used in active 3D are not very comfortable and you will find some people complaining of headaches after using them for long periods. They are also more costly to buy than the glasses used in passive 3D. The advantage they have however is that they are well compatible with existing hardware sets and this therefore means that you do not have to incur an extra cost buying others.

Polarizing glasses are used with passive 3D technology. The disadvantage of these glasses is that they reduce the amount of light, so only half of the light that is emitted from the screen actually reaches the eye. This, in turn, dulls the image. But, there are advantages associated with these glasses. One advantage is that they are less costly when compared to glasses that are used for active 3D viewing. Wow, 3D technology is certainly taking the market by storm!




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