SU409215A1 - DEVICE FOR INDICATION SIGNS - Google Patents

Description

one

The invention relates to the field of automation and computing technology and can be used in output devices and visual information display.

By bus. St. No. 345857, a device for indicating signs is known, comprising a laser, a polarizer, an optical modulator, an analyzer, a lens system, a deflector, a screen and control units connected respectively to the modulator and to the deflector in series on the same optical axis.

The proposed device differs from the known one in that the optical modulator is made in the form of two crossed polarizers, between which phase cells are placed, made on crystals with a longitudinal electro-optical effect and with a transparent wire and a transparent coating and a segment coating on its surface. .

Such an optical modulator makes it possible to reduce the operating voltage on the segments, to reduce the light energy notary, to increase the brightness of the characters on the screen.

Pa figs. 1 shows a block diagram of the described device; in fig. 2 - placement of segment B in phase cells.

The device contains a block / zanoom, a register of 2 characters, a register of the 3 position of the sym-wave, a screen 4, switching keys 5, a source

6, an optical modulator 7, a laser 8, a polarizer 9, an analyzer 10, a lens system 11, and a deflector 12.

The device works as follows.

The character code is transmitted to the character register, and the beam deflection coordinate code is transferred to the character position register. Both codes are stored and simultaneously retrieved from the memory unit.

A laser 8 with a significant beam diameter and low divergence was used as a radiation source in the device (Fig. 1). The laser beam passes through a crossed polarizer 9, oriented pausing of the initial polarization, a laser beam, an optical modulator 7 and an analyzer 10. The optical modulator consists of four elements, phase cells, each of which includes an electro-optical crystal 13 ( for the dihydrophosphate group), an electrode with an sputter coating 14 and a set of electrodes 15 with segment coatings (Fig. 2).

The control voltages from source 6 are supplied via switching keys, which in the simplest case are controlled by a / g-ramp code (where rt is the number of segments). If there is a "1 in the code bit, the corresponding key controlled by this bit is closed. The laser beam modulated by the symbol is transformed by the optical system of the lenses L into a collimated or converging beam in a C01 THA with the aperture of optical cascades from the deflector slope 12. In accordance with the control voltage of the symbol position register applied to the deflector polarization switches, modulated by the symbol is deflected to the desired position on screen 4. The beam is modulated in the cross-sectional plane using optical phase modulators, the segment electrodes in each of which Selective inclusion of certain areas in the cross section of the laser plane of the beam. The subject of the invention is a device for displaying signs on the author. St. 345857, characterized in that, in order to improve the image quality of symbols, the optical modulator in it is made in the form of two crossed polarizers, between which phase cells are made, pa made of crystals with a longitudinal electro-optical effect and coated with its surface, respectively, a continuous conductive transparent coating and segment coating.

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