Telestereoscope


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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Telestereoscope

 

a binocular, periscopic optical instrument. A telestereoscope consists of two optic tubes with eyepieces, a mounting, a graduated circle, and a tripod; it has a magnification factor of 10 to 20. The stereoscopic base line—the distance between the objectives—is adjustable to a maximum of 75 cm and is responsible for the stereoscopic images produced. Tele-stereoscopes are used from concealed positions to observe enemy activities, spot shell bursts, and study the terrain. Vertical and horizontal angles are measured by means of a reticle located in the right eyepiece. Some telestereoscopes are equipped with movable lens rings mounted on the eyepieces, which make it possible to make observations with or without a gas mask. The graduated circle and the reticle are illuminated. The magnification factor of 20 is achieved with the aid of an auxiliary lens.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.