SU426260A1 - METHOD OF CONTROL OF ANGLES BETWEEN THE ELECTRONIC AXES OF ELECTRONIC PROTECTORS OF TWO-RAY STEREOTRON12 - Google Patents

Description

The invention relates to the field of stereoscopic electron beam tubes, in particular, to methods for controlling the angle between the optical axes of electronic projectors of a two-beam stereotron.

In a known way, the angle between the optical axes of the spotlights is estimated using a template that controls the angle between the processes of the shell in which the spotlights are placed. The size and shape of the plate corresponds to the location of the shoots at an angle of 90 ° to one another. However, during the installation of spotlights in the manufacture of the tube, the coincidence of their axes with the axes of the processes can easily be disturbed, for example, due to uneven wall thickness of the processes and errors in the assembly of the projector itself.

In addition, the shape of the shoots may differ from the process. As a result, the method of control with the help of a template is not sufficiently reliable and makes it possible to judge the magnitude of the measured angle of the sheet approximately.

The purpose of the invention is to increase the accuracy of control of the angle between the optical axes of the stereotron.

This is achieved by successively emitting the beams of the spotlights in the undeflected position and the beams deflected in the direction of increasing the angle between them in the intersection plane of the non-deflected beams. In this case, each of the deflected rays is interrupted at regular intervals. Then by

the number of points highlighted inside the angle formed by the rays emitted by the non-deflected rays is judged on the angle between axes.

So, with a period t of breaking off the broken beams, a period G of rotating the screen and n points between the beams and under the condition that the spotlights work and depending on the area of the screen, the angle is equal to

-. 360 °.

FIG. 1 shows a stereotron, a top view and a block diagram of an aligned vector array; in fig. 2, a-d - epures explaining the proposed method.

A stereotrope consists of a shell / in which processes are placed electronic projectors having modulators 2, 3 and deflecting 1; e coils 4, 5. Inside the shell in the direction indicated by the arrow screen 6 rotates; equipped with irises 8 and 9. A drorez 9, located at one of the edges of the screen, is made possible for 3 definitions1, and neither the moment when the screen 6 passes through the cnmetmetrin 10 plane of the stereotron. In the region of the plane of symmetry and outside the envelope there is an optical sensor 11, at the output of which pulses appear in the moment-5 of the passage of the slits 8 through the plane 10. These pulses 1 enter the counter 12, the pulses from the slits 8 are used as counts, and the pulse from slot 9 - as a waste. At the output of the counter 12, the decoder 13 is turned on, which triggers the formers 14 and 15 of the current pulses to the deflecting coils 4, 5 and the formers 16 and 17 of the highlight voltage pulses fed to the modulators 2, 3.15 At the time /, (times ti, / 2 and 4 correspond to the moments of passage of the slot 9 and the screen 6 through the plane 10) from the interpreter 13 to the driver 14, a trigger pulse is issued, the duration of which 20 is equal to the screen rotation time, approximately 90 °. During this time, a current flows through the deflecting coil 4 (Fig. 2, a). At the same time, from the decoder 13 through the driver 16, the modulator 2 serves a pulse sequence with a frequency of passing the slots 8 through the plane 10. Thus, in the volume of screen rotation, flip one of the searchlights in a deviated position, interrupted after 30 equal intervals of time ( line 18 in Fig. 1). When the screen reaches 6, according to the diagram shown in FIG. / (moment / 4 la fig. 2, b) from the decanter 13 through the shaper 1635 to the modulator 2 serves a pulse, the duration of which is equal to the time of rotation of the screen 6 approximately 90 °. In this way, the beam of the same spotlight is highlighted in the non-deflected position (line 19 in FIG. 1). With the farthest 4o movement of the screen 6, starting from Moment 4 (Fig. 2, d), similarly, but with the help of the imaging unit 17 and the modulator 3, the undivided beam of the other detector is highlighted (line 20 on the fng. I). The deflected beam of the same spotlight is highlighted and interrupted in a manner similar to the flashing of line 18, but with the help of shapers 15 and 17, modulator 5 and coil 5, starting from the moment / g, (line 21 in Fig. I). Then, from time t, the process is repeated, highlighting again line 18, then line 19, and so on. As a result, the four lines are continuously displayed in the volume of the tube. The number of illuminated points of lines 18 and 21, enclosed within the ugp formed by lines 19 and 20, is counted and, knowing the number of slots 8 and the speed of rotation of screen 6, find the angle between the lines 19 and 20, i.e. between optical axle spotlights stereotron. For convenience of visual reference with a large number of points, it is possible to envisage periodic amplification of the highlight of the points of lines 18 and 21, for example, every tenth point. Subject of the invention. A method for controlling the angle between the optical axes of electronic projectors of a two-beam stereotron, characterized in that the electron beams are successively illuminated in the non-deflected position and the rays deflected in the direction of increasing the angle between them in the intersection and deflection rays, interrupting each of the deflected rays at equal intervals of time, and by the number of points enclosed within the angle formed by the emitted rejected rays, the angle between the axes is determined.

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