Various uses of 3D Glasses

By: Scott Darnell55 Scott Darnell55


3D Glasses

3D glasses or three dimensional imaging was invented by Sir Charles Wheatstone in 1840. The technique used in creating 3D glasses is popularly known as stereoscopic imaging. With the help of this technique, you can record three dimensional visual information. In other words, you can create an in-depth illusion.

How it works:
Stereoscopic photography consists of creating a 3-D illusion, from a pair of 2-D images. In order to create depth perception in the brain, the viewer is provided with two different images, which represent two perspectives of the same object, with a minor deviation, similar to the perspectives in binocular vision.

In case of circularly polarized glasses, the viewer wears a low cost eyeglass which contain circular polarizes mounted in reverse of opposite handedness. The viewer can tilt his head while wearing this type of glass.

3D glasses in the movie world:
The illusion of 3D glass in a movie or photo is made possible by presenting a slightly different image to each eye.

In the movie world, 3D scanners are used for creating three dimensional photography to detect and record 3 dimensional information. Actually, the three dimensional information is reconstructed from 2 images using a computer by corresponding the pixels in right and left eyes.

Use in military trainings:
Far-reaching arguments could be made over 3d glasses’ effect on military trainings. The United States Army and Navy are use virtual images through specially crafted 3D glasses to produce a virtual reality that gives the trainees a truer realization of the “nature of the beast” they will be in the battle field. Increasing battle simulation techniques may decrease the lives saved in those participating in the 3D training, however it also increases the lives taken on those not participating in the 3D training. And in a perfect society, one person’s life should not be worth more than another’s.

Health science:
Improving health using virtual reality, and surgeons taking advantage of highly technical 3D glasses which increase the accuracy of surgery, are certainly honorable applications. But as with any discoveries in science, particularly genetic manipulation and cloning, a myopic view of ethics will lead to a crumbling society. Our eyes must continue to have a clear vision to the future, and be careful to ascertain the applications of brain manipulation through 3D images.

NASA:
Now days, NASA, airline and automotive industries are using 3D technology for various purposes.

Materials used to make 3D glasses:
3D glasses are made of LCD shutter glasses, which contain liquid crystal, alternate frame sequencing is used. In some cases, 3D glasses are also made of linearly polarized glasses. The polarization is preserved well when a silver screen is used.

The viewer should keep his head in a level, as tilting will cause the images of the right and left channels to bleed over to the opposite channel.

Precaution:
In order to avoid problems with flipped views, a few guidelines are to be followed while using 3D glasses:

- Make sure that the layer’s position values are whole numbers like 250 instead of 245.9

- In case the right and left view images are interlaced, deinterlace them before using 3D glasses to avoid a field mismatch.

- Always use the same vertical dimensions for the composition and source images.

- Since 3D glasses create interlaced frames, do not select an interlace option in the render settings box.

End talks:
The centurion 3D glasses will someday become a relic. But their influence will remain for centuries to come.


Scott Darnell is author of this article on Plastic 3D Glasses. Find more information about 3D Glasses here.