3D cinema didn't already need to wear glasses

3D cinema didn't already need to wear glasses

South Korean researchers have developed a technology that could allow the construction of cinemas in 3D that do not require the use of special glasses. Explained its creators of Seoul National University, the system uses a kind of barrier so the public can see different images in each of their eyes.

In this way, the brain generates the illusion of depth without the need for additional accessories. The TV manufacturers have tried to do the same with similar systems, but your problem is that designs developed thus far need to located in a particular place the person to be the 3D image.

Apply this system in a film would be unviable, taking into account that the audience needs to look at the screen from a variety of angles. However, a recent study published in the journal Optics Expresspresentó a system that would not have these limitations.

"This new method appears to be a feasible way of making 3D environments without glasses with a front projection technology, instead of using multiple projectors only uses one", said the Professor John Koshel, Department of optical Sciences at the University of Arizona, in the United States, who edited the work for publication.

Koshel explained that the usual way of creating 3D images on a screen makes use of stereoscopes: the technique involves projecting two images in two dimensions through a special filter.

To the naked human eye both versions of the image appear as superimposed on each other, but when one gets polarized, the left lens only allows you to see one of the pictures, while quel right focuses on the other, thus creating a sense of depth.

To achieve this effect without having to wear glasses the TV manufacturers have used various techniques through the use of what is known as a parallax barrier.

This barrier is located opposite the source of the image, which has a kind of slats, similar to the Venetian blinds.

Splints are positioned at a certain angle to make light of a section of the screen is planned in one of the eyes of the Viewer, and the light of another section in the other eye, without that the images overlap.

However, this only works if the person is located at a specific point in front of the screen.

TV manufacturers have managed to design screens that allow several members of a family to see 3D images without glasses, but in any case dozens or even hundreds of people sitting in a cinema at the same time.

So the South Korean team used this same technique, but adapted it so that it had a greater range of vision from different angles.

This generated this effect of tablets but this time using polarizers similar to those used in the glasses for cinemas in 3D.

In addition, covered the screen with a special coating, that combined with adapted barrier produces several pairs of images, in theory, enough so that can see them the people sitting in front of a cinema screen.

The researcher in charge of the work at the National University of Seoul, Byoungho Lee, said that more research will still be needed, but that the technology "could be a simple, compact and inexpensive way to build a 3D film by eliminating the need for glasses".