Stereoscopes.net http://www.stereoscopes.net 3D photography Sun, 23 Dec 2007 14:04:15 +0000 http://wordpress.org/?v=2.5.1 en Stereoscopes http://www.stereoscopes.net/2007/10/09/stereoscopes/ http://www.stereoscopes.net/2007/10/09/stereoscopes/#comments Tue, 09 Oct 2007 13:24:47 +0000 admin http://www.stereoscopes.net/2007/10/09/stereoscopes/ A stereoscope is a viewer used to see in 3D a two dimensional image that is actually two separate images printed side by side.

Without the stereoscope, the user needs to cross his or her eyes to see the 3 dimensional view of the image.

See also

]]> http://www.stereoscopes.net/2007/10/09/stereoscopes/feed/ The Science behind Stereoscopes http://www.stereoscopes.net/2007/10/09/the-science-behind-stereoscopes/ http://www.stereoscopes.net/2007/10/09/the-science-behind-stereoscopes/#comments Tue, 09 Oct 2007 13:24:32 +0000 admin http://www.stereoscopes.net/2007/10/09/the-science-behind-stereoscopes/ The stereoscope has many advantages.
It uses positive curvature magnifying lenses with the focal point of the image changed from a relatively short distance to a virtual distance of infinity. This reduces eye strain by focusing the eyes consistent with the parallel lines of sight. The image on the card or paper is magnified, allowing a wider field of view and the ability to examine the detail of the photograph.

In addition, the viewer provides a partition between the images, avoiding a distraction to the user. The main advantage of side-by-side viewers is that the brightness of the image is maintained so the image can be presented at a very high resolution and in full color.

The ghosting associated with polarized projection when techniques like color filtering are used is completely eliminated.

]]> http://www.stereoscopes.net/2007/10/09/the-science-behind-stereoscopes/feed/ 3-D Movies http://www.stereoscopes.net/2007/10/09/3-d-movies/ http://www.stereoscopes.net/2007/10/09/3-d-movies/#comments Tue, 09 Oct 2007 13:24:09 +0000 admin http://www.stereoscopes.net/2007/10/09/3-d-movies/ In order to produce stereoscopic moving pictures, two separate images
are projected onto the same screen using orthogonal polarizing filters. It is best to use a silver screen to preserve the polarization. The viewer wears inexpensive eyeglasses containing orthogonal polarizing filters. As each filter only passes light that is polarized the same way, the 3D effect is maintained. Tilting of the head causes the images to bleed over to the opposite channel so most viewers learn not to tilt their head.

Several individuals can view this type of stereoscopic image at the same time.

There are several commercial systems offering products like this and one can put a system like this together using kits and instructions.

To present a stereoscopic motion picture, circular polarizing filters of opposite handedness are used. The viewers wear low cost eyeglasses containing analyzing filters of opposite handedness. Light that is left-circularly polarized is extinguished by the right-handed analyzer and vice versa. The result is similar to the stereoscopic viewing using linear polarized glasses except that the viewer can tilt one’s head and still maintain the image.

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