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4.a. How to take pictures in 3d

photographs in order to achieve three dimensions is necessary to obtain two images of the same object, but the second shooting in a different direction. The angle between these two stages can be similar to the one formed by the eyes, or even higher (iperstereoscopia) for objects with low plasticity. At the professional level, to obtain images in 3D using special machines equipped with two objectives. In the absence of equipment of this kind, designed specifically for stereophotography, you can also use a normal camera. We must carry out two successive occasions, moving the camera slightly between shots and the next.

designs can also be seen in 3D. To do this, achieve two isometric or perspective views in two different directions. This is easier when you draw with the computer (CAD) since the two images can be achieved simply by rotating the object drawn.

simple stereoscope

There are people who are unable to perceive the stereoscopic images.
For these appliances that offer the greatest chance of success is the simple stereoscope.
This is a very simple instrument, in which the central divider and magnifying glasses placed in the holes acts observation facilitates the overlap of the two parties into a single image. Since the
tool to ensure better results, was taken into account in the completion of the stereoscope designed, in fact, we used standardized measures of adapting this instrument and readjust the size of the images we use.

Mirror Stereoscope

With the mirror stereoscope, the images can not be wider than the interpupillary distance (about 6 cm), otherwise the eyes would be forced to diverge. Our eyes can easily focus (observation of nearby objects), or at best remain parallel (observation of distant objects) and have great difficulties to differ. So to be able to view stereoscopic images of large size, you need a different machine,
This display is composed of four mirrors. It may work with only two mirrors, central, provided one is prepared to accept that the stereoscopic image appears mirror image of the two stereograms, left and right, to start.
The effect is very interesting, even if the game mirrors the yield tends to darken the virtual image. Usually this type of stereoscope is closed inside a box to avoid reflection of light, so it definitely improves the quality of the virtual image but their conception of the actual mechanism that produces it.