CN115437097A - Optical axis temperature compensation device for laser guidance system - Google Patents

Abstract

The invention relates to an optical axis temperature compensation device for a laser guidance system, belongs to the technical field of laser guidance, and solves the problems that a laser optical axis is affected by temperature and is disordered, and the precision is reduced. The invention includes: the device comprises a mirror frame, a U-shaped bracket, a swing rod, a base, a spring jacking assembly and an ejector rod assembly, wherein the mirror frame is used for mounting plate glass; the mirror frame is hinged with the U-shaped bracket through a first pin shaft; the other end of the U-shaped bracket is rotatably arranged on the base and is connected with the oscillating bar; the first spring jacking assembly and the first ejector rod assembly are used for positioning the mirror frame; the second spring jacking assembly and the second ejector rod assembly are respectively arranged on two sides of the swing rod and used for positioning the swing rod; the length of the ejector rod component can be extended or shortened along with the temperature change, so that the oscillating bar and the mirror frame can be pushed to rotate; when the swing rod or the mirror frame rotates, the pitching angle and the azimuth angle of the plate glass can be adjusted. The invention realizes the compensation of the deviation of the optical axis when the optical axis is influenced by the temperature.

Description

Optical axis temperature compensation device for laser guidance system

Technical Field

The invention relates to the technical field of laser guidance, in particular to an optical axis temperature compensation device for a laser guidance system.

Background

The laser beam-steering guidance is an effective means for guiding the aircraft to accurately fly to a target by taking laser as a carrier for transmitting guidance information and a laser information field as a means for controlling the aircraft to fly. However, the accuracy of adjusting the optical axis of the laser information field is greatly affected by the temperature, and a large error is easily caused under the condition of a large temperature difference.

The misalignment of two axes of the laser beam-driving guidance information field, namely the parallelism of an information field zero instruction axis and a sighting axis, is a core index of the laser beam-driving guidance information field, and the precision of laser beam-driving guidance is directly influenced. The laser beam-steering guidance system is provided with a zooming system, the consistency of optical axes of a zooming initial end and a zooming tail end is obviously influenced by temperature effect, and particularly, the temperature effect influence on the zooming system with large zooming ratio (the ratio of the magnification of the zooming tail end to the magnification of the initial end) is huge.

The conventional detection and adjustment (optical axis correction) of the deviation of the optical axis of the laser information field from the aiming optical axis is manually performed. The manual adjustment mode has low adjustment efficiency, complex operation and poor adjustment precision, and the application of the laser beam-driving guidance technology is greatly limited.

Therefore, a temperature compensation mechanism for the laser beam steering guidance optical axis needs to be designed, and the deviation of the guidance optical axis caused by temperature change can be automatically compensated.

Disclosure of Invention

In view of the above analysis, the present invention aims to provide an optical axis temperature compensation device for a laser guidance system, so as to solve the problem that the optical device of the conventional laser beam guidance system is deformed due to the influence of temperature, and the optical axis generates an angle deviation, which results in the reduction of the system precision.

The purpose of the invention is mainly realized by the following technical scheme:

in one aspect, the present invention provides an optical axis temperature compensation device for a laser guidance system, comprising: the device comprises a mirror frame, a U-shaped support, a swing rod, a base, a first spring jacking assembly, a first ejector rod assembly, a second spring jacking assembly and a second ejector rod assembly, wherein the mirror frame is used for mounting plate glass;

the mirror frame is hinged with one end of the U-shaped bracket through a first pin shaft; the other end of the U-shaped bracket is rotatably arranged on the base and penetrates through the base to be connected with the swing rod into a whole;

the first spring jacking assembly and the first ejector rod assembly are respectively arranged below the picture frame and used for positioning the picture frame; the second spring jacking assembly and the second ejector rod assembly are respectively arranged on two sides of the swing rod and used for positioning the swing rod;

the lengths of the first ejector rod assembly and the second ejector rod assembly can be extended or shortened along with the temperature change, so that the oscillating bar and the mirror frame can be pushed to rotate; when the swing rod and the mirror frame rotate, the pitching angle and the azimuth angle of the plate glass can be adjusted.

Furthermore, one end of the U-shaped bracket is of a U-shaped structure, and the other end of the U-shaped bracket is a cylindrical section; and a bracket mounting hole is formed in one end of the oscillating bar, and the cylindrical section of the U-shaped bracket is sleeved in the bracket mounting hole and is connected with the oscillating bar into a whole through a second pin.

Further, the first spring tightening assembly comprises: a first spring, the first ram assembly comprising: a first ejector rod; first spring and first ejector pin all set up in the below of picture frame, and are located the both sides of first round pin axle respectively.

Further, the lower end of the first spring is fixedly connected with the base; the upper end of the first spring is fixedly connected with a first spring sleeve; the first spring sleeve is tightly propped against the lower part of the mirror frame.

Furthermore, the lower end of the first ejector rod is connected with a first rotating screw rod, and the first rotating screw rod is screwed on the base through threads; the upper end of the first ejector rod is tightly propped against the lower part of the mirror frame.

Further, the second spring tightening assembly comprises: a second spring, the second ram assembly comprising: a second ejector rod; the second spring and the second ejector rod are respectively arranged on two sides of the swing rod.

Furthermore, one end of the second spring is connected with the base, and the other end of the second spring is connected with the second spring sleeve; the second spring sleeve is tightly propped against one side of the swing rod.

Furthermore, one end of the second ejector rod is connected with a second rotating screw rod, and the second rotating screw rod is screwed on the base through threads; the second ejector rod is tightly propped against the other side of the swing rod.

Further, the first spring and the second spring are always in a compressed state; the lengths of the first ejector rod and the second ejector rod can change along with temperature change.

Preferably, the first top rod and the second top rod are made of shape memory alloy.

Preferably, the first ejector rod and the second ejector rod are made of materials with large expansion coefficients, and the first ejector rod and the second ejector rod stretch or contract along with temperature change.

Preferably, the first spring sleeve and one side of the first ejector rod, which is contacted with the mirror frame, are provided with first boss platforms; when the frame swings in the pitching direction relative to the U-shaped support by taking the first pin shaft as an axis, the frame rolls along the surface of the first boss.

A second convex circular truncated cone is arranged on one side of the second spring sleeve, which is in contact with the swing rod, and the other side of the second ejector rod, which is in contact with the swing rod; when the swing rod swings in the circumferential direction by taking the cylindrical section of the U-shaped support as an axis, the swing rod rolls along the surface of the second boss.

Or, alternatively, the first spring sleeve and one side of the first ejector rod, which is in contact with the mirror frame, are provided with a first ball in a nested manner; the first ball can roll in the first spring sleeve or the first ejector rod; when the mirror frame swings in the pitching direction relative to the U-shaped support by taking the first pin shaft as an axis, the first ball rolls along the lower surface of the mirror frame.

The sides of the second spring sleeve and the second ejector rod, which are contacted with the swing rod, are provided with second balls; the second ball is nested and arranged in the second spring sleeve and the second ejector rod; when the oscillating bar swings in the circumferential direction relative to the base by taking the cylindrical section of the U-shaped support as an axis, the second ball rolls along the surface of the oscillating bar.

On the other hand, the process of performing optical axis temperature compensation by using the optical axis temperature compensation device is as follows: firstly, fixedly mounting plate glass in a mirror frame; then, the first ejector rod and the second ejector rod deform under the action of temperature change; the swing rod and the mirror frame are further pushed to deflect, the azimuth angle and the pitching angle of the flat glass are adjusted, and the deviation of an optical axis is automatically compensated; finally, after the swing rod and the picture frame deflect, the first spring and the second spring synchronously deform, so that the first spring sleeve is always tightly pressed on the picture frame, and meanwhile, the second spring sleeve is always tightly pressed on the swing rod to keep the positioning of the flat glass.

Further, the positions of the spring jacking assembly and the ejector rod assembly can be interchanged; according to the direction of the optical axis deviated along with the temperature change, the spring jacking component and the ejector rod component are arranged, so that the telescopic quantity of the ejector rod component generated along with the temperature change can drive the mirror frame to deflect, and the deviation of the optical axis generated under the temperature influence is compensated.

The technical scheme of the invention can at least realize one of the following effects:

1. the invention provides an optical axis temperature compensation device for a laser guidance system, which can automatically adjust the pitching angle and the azimuth angle of flat glass in the guidance system through the automatic deformation of a mandril due to the influence of temperature, and further can automatically compensate the optical axis deviation of a laser beam steering guidance information field caused by temperature deformation.

2. The invention fixes the flat glass between the guidance light path zooming system and the emission objective lens on the lens frame which can deflect in a pitching way and rotate in an azimuth, and the flat glass is used as a guidance optical axis offset compensation element. And then the first ejector rod and the second ejector rod which are made of materials with large expansion coefficients are used as driving elements for driving the adjusting plate glass to rotate, the driving elements drive the mirror frame to rotate through the lever, when the temperature changes, the driving elements made of materials with large expansion coefficients expand or contract along with the temperature change to generate directional driving force, and the first ejector rod and the second ejector rod drive the plate glass to rotate through the lever.

3. The optical axis temperature compensation method for the laser guidance system is applied to self-correction of a laser beam guidance information field, and can calibrate optical axis deviation caused by temperature influence, so that the accuracy of a laser beam guidance technology is improved, and a feasible scheme is provided for upgrading a laser beam guidance product; the application of the invention can improve the guidance accuracy of the laser beam-driving guidance product.

4. The invention adopts the optical axis temperature compensation device of the laser guidance system to replace the existing manual adjustment mode, does not need manual intervention correction, and autonomously ensures the two-axis misalignment index of the guidance information field in the full temperature use range. And then can greatly improve the preparation time of laser beam-driving guidance products, avoid manual operation errors, and improve the automation and digitization level of the laser beam-driving guidance technology.

In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.

FIG. 1 is an optical schematic diagram of an optical axis of a laser frame beam guidance system;

FIG. 2 is a schematic structural diagram of an optical axis temperature compensation device for a laser guidance system according to the present invention;

FIG. 3 isbase:Sub>A cross-sectional view in the direction A-A of the optical axis temperature compensation device for the laser guidance system of FIG. 2;

FIG. 4 is a sectional view in the direction B-B of the optical axis temperature compensation device for the laser guidance system of FIG. 3.

Reference numerals are as follows:

1-plate glass; 2-the spectacle frame; 3-a first pin shaft; 4-U-shaped bracket; 5-a second pin; 6-oscillating bar; 7-a base; 8-a first spring; 9-a first spring sleeve; 10-a first ejector rod; 11-a first rotating screw; 12-a second ejector rod; 13-a first set screw; 14-a second spring sleeve; 15-a second spring; 16-a second rotating screw; 17-second set screw.

Detailed Description

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the invention serve to explain the principles of the invention and not to limit its scope.

Example 1

One embodiment of the present invention, as shown in fig. 2-4, discloses an optical axis temperature compensation device for a laser guidance system, comprising: the glass frame 2 is used for mounting the plate glass 1, the U-shaped bracket 4, the swing rod 6, the base 7, the first spring jacking component, the first ejector rod component, the second spring jacking component and the second ejector rod component;

the spectacle frame 2 is hinged with one end of a U-shaped bracket 4 through a first pin shaft 3; the other end of the U-shaped bracket 4 is rotatably arranged on a base 7 and penetrates through the base 7 to be connected with a swing rod 6 into a whole;

the first spring jacking assembly and the first ejector rod assembly are arranged below the spectacle frame 2 and are used for positioning the spectacle frame 2; the second spring jacking assembly and the second ejector rod assembly are respectively arranged on two sides of the swing rod 6 and used for positioning the swing rod 6;

the lengths of the first ejector rod assembly and the second ejector rod assembly can be extended or shortened along with the temperature change, so that the swing rod 6 or the mirror frame 2 can be pushed to rotate; when the swing rod 6 or the mirror frame 2 rotates, the pitching angle and the azimuth angle of the plate glass 1 can be adjusted.

As shown in fig. 2, the upper portion of the frame 2 is a ring-shaped glass mounting portion, and the lower portion is a flat plate portion. As shown in fig. 2 to 4, the flat glass 1 is fixed to the frame 2 by adhesion, and is connected to the U-shaped bracket 4 by the first pin 3, so that the flat glass 1 and the frame 2 can rotate along the axis of the first pin 3. When the first mandril component deforms and drives the mirror frame 2 to rotate along the axis of the first pin shaft 3 relative to the U-shaped support 4, the plate glass 1 can be driven to perform pitching motion.

In a specific embodiment of the present invention, one end of the U-shaped bracket 4 is a U-shaped structure, and the other end is a cylindrical section; and one end of the oscillating bar 6 is provided with a bracket mounting hole, and the cylindrical section of the U-shaped bracket 4 is sleeved in the bracket mounting hole and is connected with the oscillating bar 6 into a whole through a second pin 5. As shown in fig. 4, the cylindrical section of the U-shaped support 4 is rotatably mounted on the base 7, so that the U-shaped support 4 can rotate along the axis of the cylindrical section, and further the frame 2 is driven to generate circumferential deflection/azimuth rotation.

As shown in figure 2, the cylindrical section of the U-shaped bracket 4 passes through the base 7 to be connected with the swing rod 6 and is fixedly connected through the pin 5, so that the relative rotation between the U-shaped bracket 4 and the swing rod 6 is prevented. Because the U-shaped support 4 and the swing rod 6 are relatively fixed, the swing rod 6 can be driven to deflect by the deformation of the second ejector rod assembly, the U-shaped support 4 also synchronously deflects in the circumferential direction, and further the circumferential deflection of the plate glass 1 is realized. Namely, the plate glass 1, the mirror frame 2, the U-shaped support 4 and the swing rod 6 can rotate along the axis of the cylindrical section of the U-shaped support 4, namely, the swing rod 6 can drive the plate glass 1 to rotate in the circumferential direction when rotating.

(I) Pitch angle offset compensation

In an embodiment of the present invention, the first spring biasing assembly includes: a first spring 8 and a first spring sleeve 9. The first ram assembly comprises: a first top rod 10 and a first rotating screw 11. As shown in fig. 2.

First spring 8 and first ejector pin 10 all set up in the below of picture frame 2, and are located the both sides of first round pin axle 3 respectively.

As shown in fig. 2, a first spring 8 and a first spring bushing 9 are attached to the lower left side of the flat plate portion of the frame 2, and a first push rod 10 and a first rotary screw 11 are attached to the lower right side.

In one embodiment of the present invention, as shown in fig. 2, the lower end of the first spring 8 is fixedly connected to the base 7; the upper end of the first spring 8 is fixedly connected with a first spring sleeve 9; the first spring sleeve 9 is tightly pressed below the spectacle frame 2 under the elastic force of the first spring 8.

Specifically, the first spring 8 is installed in a first spring installation hole on the base 7, the first spring installation hole is perpendicular to the flat plate portion of the spectacle frame 2, and the first spring sleeve 9 is sleeved outside the first spring 8.

Specifically, the lower end of the first ejector rod 10 is connected with a first rotating screw rod 11, and the first rotating screw rod 11 is screwed on the base 7 through threads; the upper end of the first top rod 10 is tightly propped against the lower part of the spectacle frame 2.

Specifically, the first push rod 10 is installed in a first push rod installation hole on the base 7, the first push rod installation hole is perpendicular to the flat plate portion of the mirror frame 2, and the first spring installation hole and the first push rod installation hole are located on two sides of the first pin shaft 3.

Further, as shown in fig. 2, the base 7 is further provided with a first stop screw 13. The first stopper screw 13 is provided on a side surface of the first rotary screw 11, and the first stopper screw 13 is tightened to be pressed against the first rotary screw 11, whereby the first rotary screw 11 can be fixed.

During implementation, the first spring sleeve 9 is driven by the elastic force of the first spring 8 and tightly abuts against the lower portion of the left side of the mirror frame 2, and the first rotating screw rod 11 is rotated to drive the first ejector rod 10 to move up and down, so that the first ejector rod 10 tightly abuts against the lower portion of the right side of the mirror frame 2. When the temperature changes, the length of the first ejector rod 10 changes, and then the mirror frame 2 is driven to rotate, and as the flat glass 1 is fixedly connected with the mirror frame 2, the flat glass 1 of the mirror frame 2 can rotate along the axis of the first pin shaft 3; after the first ejector rod 10 drives the pitching direction of the mirror frame 2 to rotate, the first spring 8 stretches out and draws back along with the rotation of the mirror frame 2, the first spring sleeve 9 moves up and down under the action of the elastic force of the first spring 8, the position of the mirror frame 2 after rotation is maintained to be fixed, the rotating direction of the mirror frame 2 is opposite to the offset direction of the flat glass 1 affected by temperature, and offset compensation of the pitching direction of the flat glass 1 is realized.

(II) Azimuth offset Compensation

In an embodiment of the present invention, as shown in fig. 3, the second spring tightening assembly includes: a second spring 15 and a second spring sleeve 14; the second ejector pin subassembly includes: a second ram 12 and a second rotating screw 16; as shown in fig. 3.

The second spring 15 and the second ejector rod 12 are respectively arranged on two sides of the swing rod 6. The second ejector rod 12 is used for driving the swing rod 6 to rotate, and further drives the U-shaped support 4 and the mirror frame 2 to rotate.

In one embodiment of the present invention, one end of the second spring 15 is connected to the base 7, and the other end is connected to the second spring sleeve 14; the second spring sleeve 14 is tightly pressed against one side of the swing rod 6 under the action of the elastic force of a second spring 15.

In a specific embodiment of the present invention, one end of the second top bar 12 is connected to a second rotating screw 16, and the second rotating screw 16 is screwed to the base 7 through a thread; the second rotating screw 16 is rotated to drive the second top bar 12 to move, so that the second top bar 12 is tightly pressed against the other side of the swing rod 6.

As shown in fig. 3, the upper and lower sides of the swing link 6 are respectively provided with a second spring 15, a second spring sleeve 14, a second top rod 12 and a second rotary screw 16.

Specifically, the second spring 15 is installed in a second spring installation hole on the base 7, the second spring installation hole is perpendicular to the swing rod 6, and the second spring sleeve 14 is sleeved outside the second spring 15. The second spring sleeve 14 is pressed against the swing rod 6 under the action of the elastic force of the second spring 15.

Specifically, the second ejector rod 12 is installed in a second ejector rod installation hole on the base 7, the second ejector rod installation hole is perpendicular to the swing rod 6, and the second spring installation hole and the second ejector rod installation hole are located on two sides of the swing rod 6.

When in implementation: the second spring sleeve 14 presses the swing rod 6 on the second ejector rod 12 under the elastic force of the second spring 15, and the second rotating screw 16 is rotated to drive the second ejector rod 12 to move, so that the swing rod 6 is driven to rotate, and the initial position of the swing rod 6 is adjusted. The second ejector rod 12 extends and contracts in length under the influence of temperature, so that the swing rod 6 rotates. As shown in fig. 4, when the swing link 6 rotates, the second spring 15 extends or shortens, so that the second spring sleeve 14 always extrudes the swing link 6, and the second spring 15 and the second top rod 12 limit the position of the swing link 6 together. Because the plate glass 1 is fixedly connected with the swing rod 6 through the mirror frame 2 and the U-shaped support 4, when the swing rod 6 rotates in the circumferential direction, the plate glass 1 can rotate along the axis of the U-shaped support 4.

Further, as shown in fig. 3, a second stop screw 17 is further provided on the base 7. The second stopper screw 17 is provided on a side surface of the second rotating screw 16, and the second stopper screw 17 is tightened to be pressed against the second rotating screw 16, whereby the second rotating screw 16 can be fixed.

After the mounting of the invention is finished, the first rotating screw 11 is locked and fixed by a first stop screw 13; the second rotary screw 16 is locked by a second set screw 17.

In one embodiment of the present invention, the first spring 8 and the second spring 15 are always in a compressed state; the lengths of the first and second lift pins 10 and 12 can be changed according to temperature changes.

Preferably, the first top rod 10 and the second top rod 12 are made of an additive material with stable performance and large expansion coefficient, such as: organic glass or nylon and the like.

Preferably, the first top bar 10 and the second top bar 12 are made of shape memory alloy. The length of the first ejector rod 10 and the length of the second ejector rod 12 are changed by utilizing the two-way memory effect of the shape memory alloy, the swing rod 6 and the mirror frame 2 are pushed to rotate, and the angle adjustment of the mirror frame 2 is further realized. Two-way memory effect: the recovery of the high-temperature phase shape at high temperature and the recovery of the low-temperature phase shape at cooling is called a two-way memory effect.

When the temperature changes, the first ejector rod 10 and the second ejector rod 12 stretch along the length direction to drive the mirror frame 2 and the swing rod 6 to rotate and drive the plate glass 1 to rotate along the pitching and azimuth axes, so that the guidance optical axis is deviated, and the deviation of the optical axis caused by the temperature change is compensated by driving the optical axis to deviate through the stretching and the contraction of the ejector rods. The direction and the angle of the guidance optical axis deviation caused by the temperature compensation device are opposite to the direction of the guidance optical axis deviation generated by the original guidance system without the temperature compensation device due to the temperature effect, and the angle is the same, so that the temperature automatic compensation of the guidance optical axis can be realized.

When the optical axis temperature compensation device of embodiment 1 is used to perform optical axis temperature compensation, the method includes the following steps:

firstly, the offset of the optical axis of the optical system can be obtained according to a simulation experiment or a field experiment of an actual application scene; and determining the deformation amount and the installation position of the first ejector rod 10 and the second ejector rod 12 of the deformation structural member according to the offset of the optical axis.

Fixedly mounting a flat glass 1 in a mirror frame 2; specifically, the plate glass 1 is stuck on the mirror frame 2; the first rotating screw rod 11 is rotated to drive the first top rod 10 to move, so that the upper end of the first top rod 10 is contacted with the bottom surface of the spectacle frame 2; meanwhile, the first spring sleeve 9 is contacted with the bottom surface of the other end of the spectacle frame 2; the initial position of the pitching direction of the lens frame 2 is fixed by the first mandril 10 and the first spring sleeve 9 which are propped against the two ends of the lens frame 2 together.

The second rotating screw 16 is rotated to drive the second ejector rod 12 to move, so that the second ejector rod 12 is tightly pushed against one side of the swing rod 6, and the other side of the swing rod 6 is in contact with the second spring sleeve 14; the mirror frame 2 is connected with the swing rod 6 through the U-shaped support 4, and the two sides of the swing rod 6 are tightly propped against through the second ejector rod 12 and the second spring sleeve 14, so that the initial circumferential direction angle of the swing rod 6 and the mirror frame 2 is fixed.

Then, the first ejector rod 10 and the second ejector rod 12 are deformed by temperature change; further pushing the swing rod 6 and the mirror frame 2 to deflect, and adjusting the azimuth angle and the pitching angle of the flat glass 1;

when the temperature changes, the first ejector rod 10 and the second ejector rod 12 stretch and contract;

specifically, the method comprises the following steps: when the first ejector rod 10 stretches, the mirror frame 2 is driven to rotate, the flat glass 1 is fixedly connected with the mirror frame 2, and the mirror frame 2 and the flat glass 1 rotate along the axis of the first pin shaft 3; the rotation direction of the lens frame 2 and the plate glass 1 is the same as the offset angle of the optical axis in the pitching direction affected by the temperature, and the direction is opposite, so that the offset compensation of the optical axis in the pitching direction is realized.

Specifically, the method comprises the following steps: when the second ejector rod 12 stretches, the swing rod 6 is driven to rotate, the mirror frame 2 is connected with the swing rod 6 through the U-shaped support, and the mirror frame 2 synchronously rotates along with the swing rod 6; the flat glass 1 is fixedly connected with the glass frame 2, when the synchronous swing rod 6 of the glass frame 2 rotates along the axis of the U-shaped support 4, the rotating directions of the glass frame 2 and the flat glass 1 are the same with the offset angle of the circumferential direction of the optical axis influenced by the temperature, and the directions of the offset angle are opposite, so that the offset compensation of the circumferential direction of the optical axis is realized.

That is to say, the first ejector rod 10 and the second ejector rod 12 stretch out and draw back, can drive the pendulum rod 6 and the picture frame 2 to rotate, and then can drive the sheet glass 1 to rotate, and rotatory sheet glass 1 can cause the guidance optical axis to squint, and the direction of optical axis skew is opposite with the guidance optical axis skew direction that the system received the temperature effect to cause, accomplishes the temperature compensation to the guidance optical axis, offsets the skew error that the optical axis produced because of temperature variation.

Finally, after the swing rod 6 and the picture frame 2 deflect, the first spring 8 and the second spring 15 synchronously deform, so that the first spring sleeve 9 is always tightly pressed on the picture frame 2, and meanwhile, the second spring sleeve 14 is always tightly pressed on the swing rod 6, and the flat glass 1 is kept to be positioned.

Specifically, after the first ejector rod 10 drives the mirror frame 2 to rotate in the pitching direction, the first spring 8 stretches along with the rotation of the mirror frame 2, the first spring sleeve 9 is displaced under the elastic action of the first spring 8, and the first spring sleeve 9 and the first ejector rod 10 limit the position of the mirror frame 2 after rotation together. When the second ejector rod 12 stretches and retracts to drive the swing rod 6 to rotate, the second spring 15 extends or shortens, the second spring sleeve 14 is enabled to extrude the swing rod 6 all the time, and the position of the swing rod 6 is limited by the second spring sleeve 14 and the second ejector rod 12 together.

Further, the positions of the spring jacking assembly and the ejector rod assembly can be interchanged; according to the direction that the optical axis squints along with the temperature variation, set up the position of tight subassembly of spring top and ejector pin subassembly, make the flexible volume that the ejector pin subassembly produced along with the temperature variation can drive picture frame 2 and deflect, compensate the offset that the optical axis produced by the temperature influence.

The direction of this mechanism optical axis compensation accessible exchanges the position of spring sleeve and ejector pin and controls, and the angle of optical axis compensation accessible ejector pin length deflection is controlled.

Specifically, when the material of the first lift pin 10 and the second lift pin 12 is the shape memory alloy, the amount of expansion and contraction of the first lift pin 10 and the second lift pin 12 at a corresponding temperature is calculated by the offset amount of the optical axis at a specific temperature.

Specifically, when the material of the first lift pin 10 and the second lift pin 12 is a material with a large expansion coefficient, the material of the first lift pin 10 and the second lift pin 12 is selected and the amount of expansion and contraction of the first lift pin 10 and the second lift pin 12 at the corresponding temperature is calculated from the amount of displacement of the optical axis at the specific temperature.

Example 2

In a specific embodiment of the present invention, an optical axis temperature compensation device is provided, which is improved based on embodiment 1:

in a specific implementation manner of this embodiment:

specifically, the first spring sleeve 9 and one side of the first ejector rod 10, which is in contact with the spectacle frame 2, are provided with first boss platforms; when the frame 2 swings in the pitching direction relative to the U-shaped bracket 4 with the first pin 3 as the axis, the frame 2 rolls along the surface of the first boss.

A second convex circular table is arranged on one side of the second spring sleeve 14, which is in contact with the swing rod 6, of the second ejector rod 12; when the swing rod 6 swings in the circumferential direction by taking the cylindrical section of the U-shaped support 4 as an axis, the swing rod 6 rolls along the surface of the second boss.

Alternatively, in another specific implementation manner of this embodiment:

the first spring sleeve 9 and one side of the first ejector rod 10, which is in contact with the spectacle frame 2, are provided with first balls in an embedded manner; the first ball can roll in the first spring sleeve 9 or the first ram 10; when the frame 2 swings in the pitch direction relative to the U-shaped bracket 4 with the first pin 3 as an axis, the first ball rolls along the lower surface of the frame 2.

The second spring sleeve 14 and one side of the second ejector rod 12, which is in contact with the swing rod 6, are provided with second balls; the second ball bearing is nested and arranged in the second spring sleeve 14 and the second ejector rod 12; when the swing rod 6 swings in the circumferential direction relative to the base 7 by taking the cylindrical section of the U-shaped support 4 as an axis, the second ball rolls along the surface of the swing rod 6.

In the embodiment, the convex circular truncated cone or the balls are arranged on the surfaces of the spring sleeve and the ejector rod, so that the spring sleeve and the ejector rod can effectively deflect when contacting with the picture frame 2 or the oscillating rod 6, the deflection limitation caused by the limitation of the shape to the picture frame 2 or the oscillating rod 6 is avoided, and meanwhile, the compensation effect caused by the deformation of a structural part due to the overlarge local stress is avoided.

In this embodiment, when the convex circular truncated cone or the ball contacts the frame 2 or the swing link 6, a contact type hinge structure is formed between the spring sleeve and the ejector rod and the frame 2, or between the spring sleeve and the ejector rod and the swing link 6, so as to ensure the smoothness of the automatic compensation action of the mechanism, and further ensure the accuracy of the rotation angle of the pitching rotation and the azimuth rotation of the frame 2.

When the optical axis temperature compensation device of the present embodiment is used to compensate for the optical axis offset:

1) When the spring sleeve and the end part of the ejector rod are provided with the convex circular platforms:

when the first ejector rod 10 stretches, the frame 2 swings in the pitching direction relative to the U-shaped support 4 by taking the first pin shaft 3 as a shaft, and the frame 2 rolls along the surface of the first boss.

When the second ejector rod 12 stretches, the swing rod 6 swings in the circumferential direction by taking the cylindrical section of the U-shaped support 4 as an axis, and the swing rod 6 rolls along the surface of the second boss.

2) When the spring sleeve and the end part of the ejector rod are nested with balls:

when the first push rod 10 stretches, the frame 2 swings in the pitching direction relative to the U-shaped bracket 4 with the first pin 3 as an axis, and the first ball rolls along the lower surface of the frame 2.

When the second ejector rod 12 stretches, the swing rod 6 swings in the circumferential direction relative to the base 7 by taking the cylindrical section of the U-shaped support 4 as an axis, and the second ball rolls along the surface of the swing rod 6.

Compared with the prior art, the technical scheme provided by the embodiment has at least one of the following beneficial effects:

in the optical axis temperature compensation method for automatically compensating the deviation of the laser beam steering guidance optical axis caused by the temperature change, as shown in fig. 1, in the laser beam steering guidance optical system, a flat glass 1 is placed between a zoom system and a guidance objective lens, the flat glass 1 can rotate in the pitching and azimuth directions, and the deviation direction and the angle of the guidance optical axis can be changed by the rotation of the flat glass 1.

The invention adopts a simple temperature compensation device, can enable the plate glass 1 to rotate along with the temperature change according to the preset direction and angle, further compensate (offset) the offset of the optical axis caused by the temperature change, the offset of the optical system can be obtained according to the simulation experiment or the field experiment of the practical application scene, and the deformation and the setting position of the first ejector rod 10 and the second ejector rod 12 of the deformation structural member are determined according to the offset.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.

Claims (10)

1. An optical axis temperature compensation device for a laser guidance system, comprising: the glass frame (2) is used for mounting the plate glass (1), the U-shaped bracket (4), the swing rod (6), the base (7), the first spring jacking component, the first ejector rod component, the second spring jacking component and the second ejector rod component;

the spectacle frame (2) is hinged with one end of the U-shaped support (4) through a first pin shaft (3); the other end of the U-shaped bracket (4) is rotatably arranged on a base (7) and penetrates through the base (7) to be connected with a swing rod (6) into a whole;

the first spring jacking assembly and the first ejector rod assembly are respectively arranged below the mirror frame (2) and used for positioning the mirror frame (2); the second spring jacking assembly and the second ejector rod assembly are respectively arranged on two sides of the swing rod (6) and used for positioning the swing rod (6);

the lengths of the first ejector rod assembly and the second ejector rod assembly can be extended or shortened along with the temperature change, so that the swing rod (6) and the mirror frame (2) can be pushed to rotate; when the swing rod (6) and the mirror frame (2) rotate, the pitching angle and the azimuth angle of the plate glass (1) can be adjusted.

2. The optical axis temperature compensation device for the laser guidance system according to claim 1, wherein one end of the U-shaped bracket (4) is of a U-shaped structure, and the other end of the U-shaped bracket is of a cylindrical section; and a support mounting hole is formed in one end of the swing rod (6), and the cylindrical section of the U-shaped support (4) is sleeved in the support mounting hole and is connected with the swing rod (6) into a whole through a second pin (5).

3. The optical axis temperature compensation device for a laser guidance system of claim 2, wherein the first spring biasing assembly comprises: a first spring (8), the first ram assembly comprising: a first carrier rod (10); the first spring (8) and the first ejector rod (10) are arranged below the mirror frame (2) and are respectively positioned on two sides of the first pin shaft (3).

4. The optical axis temperature compensation device for a laser guidance system according to claim 3, characterized in that the lower end of the first spring (8) is fixedly connected with the base (7); the upper end of the first spring (8) is fixedly connected with a first spring sleeve (9); the first spring sleeve (9) is tightly propped against the lower part of the lens frame (2).

5. The optical axis temperature compensation device for the laser guidance system according to claim 4, characterized in that the lower end of the first top rod (10) is connected with a first rotating screw (11), and the first rotating screw (11) is screwed on the base (7) through threads; the upper end of the first ejector rod (10) is tightly propped against the lower part of the spectacle frame (2).

6. The optical axis temperature compensation device for a laser guidance system of claim 4 or 5, wherein the second spring biasing assembly comprises: a second spring (15), the second ram assembly comprising: a second ejector pin (12); the second spring (15) and the second ejector rod (12) are respectively arranged on two sides of the swing rod (6).

7. The optical axis temperature compensation device for a laser guidance system according to claim 6, characterized in that the second spring (15) is connected at one end to the base (7) and at the other end to a second spring sleeve (14); the second spring sleeve (14) is tightly propped against one side of the swing rod (6).

8. The optical axis temperature compensation device for the laser guidance system according to claim 7, characterized in that one end of the second top rod (12) is connected with a second rotating screw (16), and the second rotating screw (16) is screwed on the base (7) through threads; the second ejector rod (12) is tightly ejected at the other side of the swing rod (6).

9. The optical axis temperature compensation device for a laser guidance system according to claim 8, characterized in that the first spring (8) and the second spring (15) are always in compression; the lengths of the first ejector rod (10) and the second ejector rod (12) can change along with the temperature change.

10. The optical axis temperature compensation device for a laser guidance system according to claim 9, characterized in that the first jack (10) and the second jack (12) are made of a material with a large expansion coefficient or a shape memory alloy.

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