SU28535A1 - Receiver for distance vision - Google Patents

Description

The long-range receiving device according to the invention, shown schematically in the accompanying drawing, is provided with a conventional-type cathode television set consisting of a cathode tube 5, all of which, with the exception of wall 12, are opaque. The electrodes 7 and 2 are inside the tube 5 and the capacitors # and 14 arranged perpendicular to each other are placed. The tube wall 12 is internally covered with a thin layer of willemite 13 and is a fluorescent screen. From the outer side there are two pipes 7 and P, which are made from an opaque material and are connected at some angle, to this wall; in the first of them is placed a concave (collecting) mirror / 7. and a strong light source 10, for example, a voltaic arc, and a second multicellular light filter b and a lens 8. The light filter .6 is composed of colored transparent elements, for example, microscopically small grains of orange and bare glass OR of other complementary colors; transmissive green rays. The ANGLE under which the pipes 7 are located and I is chosen so that the rays of light from the source 10 reflected

a mirror // and a willemite 13 layer, fell at a right angle to the filter 6. When tube 5 is turned on, a portion of the cathode rays 15 pass through the electrical source circuit through hole 16 in electrode 2 and will oscillate according to the change in the electric field created by the capacitors 4 and 14, included in the circuit controlled by the transmitting station. The spot on screen 13, on which ray 15 falls, will shine with a bright green light. At the same time, the rays of the source 10 of the light reflected from the screen 13 will pass through the filter b, and in this latter part of the spectrum is completely absorbed, except for orange and blue, which, being additional, will give an uncolored beam behind the filter. This will not occur only for those rays that are reflected from the fluorescent points of the screen. From these points on the filter 6 will fall rays of green, fully absorbed by the filter. As a consequence, to the observer viewing the screen through the optical filter o and through the lens 8 all the fluorescent points of the screen 12, 13 will appear dark.

TaicHH way on the screen can be; received a dark image. By varying the current in the tube 5, it is possible to change the fluorescence intensity of the screen and, accordingly, the intensity of the image darkening.

The subject matter of the invention.

A receiving device for the long-range video, characterized in that the cathode

a conventional teleseriser is provided with an additional illuminator of a fluorescent screen, the reflected light from which screen is designed to pass through a multicellular light filter composed of colored transparent E.P. elements, in order to absorb light from the fluorescent screen of the cathode tube and to obtain a dark image on the screen.