SU48887A1 - Photocell with light regeneration - Google Patents

Description

The present invention is based on the multiple conversion of electron fluxes into light using a fluorescent (without an afterglow) screen and, conversely, light fluxes into electron fluxes using a photovoltaic layer.

The fluorescent screen and photocathode are in the same vacuum cylinder, forming a photocell with light regeneration, in which devices for optical channeling of light, for example, quartz curved rods, are used to enhance the photoelectric effect from certain points on the surface of the photocathode.

The drawing shows schematically an exemplary form of the proposed photocell.

A semitransparent photocathode 2 and a fluorescent anode 5 are deposited in a vacuum balloon. The walls of the balloon are covered with a high-resistance thin film of metal 4 that has electrical contact with the photocathode 2 and electrode 8. The electron beams are focused by a uniform field of coil 9.

A series of glass or other Transparent sticks adjoins the outer wall of the container, on which a fluorescent anode is applied from the inside, with flat, polished ends 5.

The rods are curved in such a way that with a different polished flat end each of them is adjacent to the wall

a cylinder on which a photocathode 2 is applied on the inside.

Transparent curved rods have the ability to channel the luminous flux with very small losses, if the refractive index is transparent, the substance is greater than j / T and the absorption in this substance is small (good optical glass or quartz).

The sticks are arranged as follows. The wand 5, by its beginning, captures the light from the fluorescent spot formed by the primary flow of electrons. The end of this rod goes to the adjacent place of the photocathode, for example, near the source of cervical electrons. Enhanced, due to fluorescence, the light flux in this place gives rise to an amplified flux of photoelectrons, creating a more intense fluorescent spot on the anode 3. At the location of this second spot, the next stick 5, etc., is placed at the beginning until the -th stick 5.

In another embodiment of the photocell, the sticks may have different, for example, increasing thickness, which makes it easier to receive and send back more massive light fluxes.

If the photocell described above serves as an amplifier of weak electron fluxes, then the photoelectron flux created by the light that has passed the last stick 5 ' is focused onto the electrode 8, to which it resists;

the phenomenon of R is summed high voltage V.

The same device can serve as an amplifier of weak light fluxes. In this case, in the place where electrode 8 is placed, there is the same fluorescent anode.

The electrode system 7, placed, for example, in the path of the primary electron beam, makes it extremely easy to modulate both the light and the electrical output of the device. A change in the potential at these electrodes shifts the electronic image on the fluorescent screen and, therefore, controls the amount of light returning back. Alternatively, these electrodes can be implemented in the form of grids in the path of the primary or secondary electron fluxes.

The proposed photocell can serve as an easily modulated light source and, therefore, be of importance in devices for sound recording, optical telegraphy, television, optical telegraph and telephone, etc. Subject of the invention.

A photocell with light regeneration consisting of a photocathode and a fluorescent anode, characterized in that, in order to enhance the photoelectric effect from certain individual points on the surface of the photocathode, devices for optical channeling of light, such as quartz curved rods, are used.

// ////////////////////// A -11- I- -lUjijii- vju; fi

and about-

-Va

/ 7

ff