Red cyan glasses
The Red-Cyan glasses is now commonly used and seen everywhere because it is relatively cheap and easy to make. Only two light filters lens in red and cyan and a spectacle frame are enough.
As the picture shows, the glasses function by filtering the color so that only the red light can go through the cyan side and vice versa. But this type is not of high quality, so it has some problems like low resolution and some degrees of change in color. The much advanced one is the so-called Active-shutter glasses, alse known as Alternate-frame sequencing.
Active shutter glasses
With the help of some wireless transmission media, the glasses and screen have the same alternate-shutting frequency, i.e. 48fps. It is too fast to be detected by humen eyes. The persistence of vision gives us the illusion that the pictures for both eyes are appearing at the same time. So we form a fluent 3D view. The second type comes into the extensive utilization of by some large-scale electric appliance companies such as SONY, Samsung ect.
Holographic system
What worthes expecting most might be a far more advanced 3D technology called holographic system. It is based on the laser and rays to record almost every angle of an object then display it as recorded. This technique totally throw off the glasses burden and demonstrate a fantastic llife-like scene. But it still takes a few years to develope the machines both for recording and displaying.
References :
UPdated 3D technology
basic describtion about 3D technology
classify of 3D glasses
没有评论:
发表评论