SU1553942A1 - Scanning device - Google Patents

Abstract

The invention relates to optical devices for switching off a light beam and is used for swinging telescope mirrors. The purpose of the invention is to expand the functionality of the device. In the scanning device comprising a substrate 2 with a reflecting surface mounted for swinging, magnetoelectric propellers 10 located in a plane perpendicular to the axis of the swing and windings 14 of which are fixed on the substrate 2, the base 8 is placed on a fixed support 18 in the plane reflective surface. Base 8 has substrate 2, magnetoelectric propellers 10, spring-loaded fingers 24 in contact with windings 14, and a self-braking worm to 27, which interacts with a worm wheel 28 rigidly mounted on a fixed support 18. Disks are fixed at opposite ends of the worm 27 shaft with holes, and the lever 31 is freely mounted on the shaft of the screw 27 and is located in the slot of front 24. On the lever there are two spring-loaded rods interacting with the holes of the disks, while one disk is offset in the center plane flax of another half the angle of rotation of the screw. 11 il.

Description

The invention relates to optical devices for deflecting a light beam from an object and is used for rolling secondary mirrors of an orbital telescope in the study of infrared radiation sources.

The purpose of the invention is to expand the scanning range with increasing its accuracy.

Fig, 1 shows a scanning device; figure 2 - section aa in figure 1; on fig.Z - section bb in figure 1 on figure 4 - RID In on fig.Z; FIG. 5 is a view of FIG. 3; figure 6 - the speech dd in figure 4; Fig.7 - section EE of Fig.Z; on Fig cross-section W in Fig, 1; Fig. 9 is view B of Fig. 3, intermediate position; FIG. 10 is a view of FIG. 3, an intermediate position; FIG. figure 11 - section dD in figure 4, the intermediate position.

The universal scanning device (Fig. 1) contains a reflecting surface 1, made on the substrate 2 and mounted on the movable supports 3 and 4, defining the swing axis 0-0 (Fig. 2). Support 3 and

4 consists of an axis 5 with a needle 6 interacting with a trunnion 7 fixed in the substrate 2. The needle 6 and the trunnion 7 are made of a precious material with a high durability of flow. Axis

5 is mounted on base 8 with relative movement. It is fixed to its axis with nuts 9. On the inner surface of the substrate 2, samples are taken to reduce its Yassa, which reduces the moment of inertia of the Swinging design in comparison with the all-glass mirror. Devices Contains two magnetoelectric actuators 10 and 11 installed in a plane, perpendicular to the movable support (axis 0-0) and equidistant from the vertical axis of the surface 1. Each propulsor consists of magnetic conductors 12 with permanent magnets 13 fixed on the base 8 (FIG. 3) and coils with windings 14 mounted on the substrate 2 (FIG. 1). The windings 14 are included in the working gaps 1 of the magnetic cores 12.

The base 8 has a protrusion 16 with openings 17 (FIGS. 1, 3), and a non-native support 18 is made a groove T9. The balls 20 are installed simultaneously in the holes 17, the groove 19 and are locked.

five

0

five

0

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0

five

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sleeve 21 so that the base 8 has the ability to rotate freely about an axis coinciding with the central axis of the reflecting surface 1. The base 8 has grooves 22 that coincide with the working gaps 15, and the windings 14 are provided with protrusions 23 with the possibility of passage in the groove 22 (FIG. 18). The protrusions 23 interact with the fingers 24, mounted at the base 8 with the possibility of vertical movement, and the spring 25, the elastic force of which is proportional to the force developed by the magnetoelectric actuators 10 and 11, and is controlled by the gaskets 26 (Fig. 1).

On the base 8, a screw-driver is fixed to 27 with a self-braking screw-type stationary support 18. At the opposite ends of the screw shaft 27, rotation nodes are installed (Figs. 3, 4 and 5), each of which contains a disk 29 with holes 30 fixed on the shaft of the screw. 27, a lever 31, freely mounted on the shaft of a screw 27, the middle part of which is embedded in the slot (Fig. 1) of the finger 24, and placed in the longitudinal groove 32, made in the base 8 (Fig. 8). On the lever 31 is installed a rod 33 with a beveled surface 34, interacting with the hole 30 and the spring 35, the elastic force of which presses the rod 33 to the disk 29 (Fig.6, 7). The rod 33 has a groove 36, interacting with the pin 37, providing a stable position of the beveled surface 34 in the upper position (6, 7). The holes 30 are located on the disks 29 at an angle y, the disk 29 of a single node of rotation is offset in the diametrical plane relative to the disk of the other node of rotation by an angle y / 2 (Figures 4, 5). At the same time, the stem 33 of one rotational unit interacts with the aperture 30 (Fig. 6), and the stem 33 of the other rotational assembly is offset relative to the aperture 30 by -v / 2 angle (Fig. 7). The spring 38, mounted on the shaft of the screw 27, presses it against the worm wheel 28, eliminates the gaps, and exerts an additional force to slow the transmission. The device contains a variable annular resistor 39 fixed on the support 18 and in contact with the spring-loaded contact 40. The step of changing the position of the scanning plane corresponds to the angle d.

The device works as follows.

The reflecting surface 1 is set to the zero position and the telescope is directed to the object under study. The coils with the windings 14 of the thrusters 10 and 11 are supplied with a control current, which, interacting with the magnetic cores 12, are drawn into the working gaps 15 and deflect the reflecting surface 1 relative to the axis 0-0, which is guaranteed to be fixed by the needles 6, which reduces the axis beating and friction to zero. The distance h (Fig. 2) from the 0-0 axis of the swing to the surface 1 is minimal, which further improves the accuracy of the swing. The clarity of the extreme positions of the surface 1 when deflected by the angle if is achieved due to the elastic force of the springs 25 and the precise timing of the instantaneous switching of the supply of control current to the windings 14 of the driver 10 to the winding 14 of the driver 11. The angle and speed of deflection of the surface 1 are controlled by the current and time his action.

When the surface 1 oscillates at an angle of up to 10 angles. measures. the protrusion 23 moves in a vertical plane by an amount of 4 ,, equal to

4 ItglO 85-0,00291 0,24735

0.3 mm, i

where 1 is the distance between the planes passing along the sections A – A and G – M (Fig. 1).

The middle part of the lever 31 is smaller than the slit of the finger 24 by an amount of 2 L and is maintained in the middle position by the springs 25, when oscillations of the angle Lf do not interact the lever 31 and the finger 24 (Fig. 8). In this case, the worm 27 fixes the base 8 relative to the worm gear 28, determining the initial position of the scanning plane relative to the fixed support 18, recorded by the contact 40 and the resistance 39.

A change in the position of the scanning plane by an angle o is carried out by applying a pulse current to the winding 14 of the propeller 10, which is significantly drawn into the working gaps 15 and the groove 22, the protrusion 23 moves the finger 24, which interacts with the lever 31 for moving it in the groove 32.

Levers 31, interacting with the rods 33, turns the disks 29 and cher0

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in to 27 at an angle W2 (Figures 9, 10), which rolled around the wheel 28, rotates the base 8 around an axis that coincides with the central axis of the surface 1. After the impulse current is removed, the spring 25 returns the lever 31 to its original position (FIG. 4) axis 5, rods 33 slip, interacting with the beveled surfaces 34 with the hole 30 (FIG. 11). In this case, the rod 33, offset from the hole 30 by the angle y / 2, interacts with the hole 30, and the rod 33 of the opposite rotation assembly is shifted by the angle y / 2 (interchangeable positions in FIGS. 6 and 7), and the new position of the scanning plane. Thus, the base 8 with the reflecting surface occupies a new position determined by the angle relative to the initial position.

In the proposed device ъ / 2 5 °, .. the gear ratio of the worm gear and 50 ,. then at 6.

If necessary, change and and, you can get the specified step of changing the position of the scanning plane. Further repositioning of the scanning plane is carried out in a similar manner. The contact of the protrusions 23 with the groove of the finger 24 ensures the stability of the working gaps 15 and a clear operability of the device.

Ingenuity formula

A scanning device containing a substrate with a reflective surface, mounted for swinging using two magnetoelectric propellers, the movable windings of which are fixed on the substrate, a fixed support, characterized in that, in order to expand the scanning range with increasing accuracy, a base is placed into the device, placed on a fixed support rotatably in a plane parallel to the surface of the reflecting surface, wherein the substrate is hingedly connected to the base on which rum is placed magnetoelectric propulsion, and their moving windings are in contact with spring-loaded fingers mounted on the base, one of which

made with a slot in which a lever is placed, freely mounted on a worm shaft, placed on the base, and interacting with a worm wheel fixed on a fixed support, while spring-loaded rods with

face side, interacting with the holes of the disks fixed on the worm shaft from both its ends, one disk being offset in the diametral plane relative to the other one by half the angle of rotation of the screw.

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FIG. 2

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Type B

thirty

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FIG. 9

View G is covered

thirty

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29

FIG. ten

FIG. eleven

Claims (1)

Claim 40 Scanning device containing a substrate with a reflective surface, mounted with the possibility of swinging using two magnetoelectric propulsors, movable windings of which are fixed on the substrate, a fixed support, characterized in that, in order to expand the scanning range with increasing accuracy, an additional 50 a base mounted on a fixed support with the possibility of rotation in a plane parallel to the plane of the reflecting surface, while the substrate is pivotally connected to the 55 base on which Oromo placed magneto movers and moving them in contact with the winding set on the basis of a spring-loaded fingers, one of which Ί is made with a slot in which a lever is placed that is freely mounted on the worm shaft located on the base and interacting with the worm wheel rigidly mounted on a fixed support, while the lever has spring-loaded rods with a beveled end surface that interact with the holes of the disks fixed on the shaft of the worm from both its ends, and one disk is displaced in the diametrical plane relative to the other by half the angle of rotation of the worm. Aa FIG. 2 B-b AND Fig. 6 View Ms FIG. 8 view B View G rotated FIG. 9 FIG. 10 YES