Alpha-beta light beam scanning device

Abstract

The invention discloses an alpha-beta light beam scanning device, and belongs to the technical field of light beam scanning, the alpha-beta light beam scanning device comprises two supporting boxes and a connecting box fixed between the two supporting boxes, supporting sleeves are fixed on the surfaces of the two supporting boxes, lifting screw rods are rotatably connected in the supporting sleeves, and guide sleeves are in threaded connection with the outer walls of the lifting screw rods; fixing boxes are fixed to the opposite faces of the two guide sleeves correspondingly, a stepping motor is installed in one fixing box, a protective shell is fixed to the output end of the stepping motor, a scanner is installed in the protective shell, a protective cover is installed on the outer wall of the other fixing box, a linear reciprocating motor is arranged in the protective cover, and the linear reciprocating motor is arranged on the outer wall of the other fixing box. And a workbench of the linear reciprocating motor is provided with two limiting rods and an electric telescopic rod. According to the alpha-beta light beam scanning device, the reconstruction error and image distortion of a scanned image can be reduced, meanwhile, the cable can be conveniently stored, and the cable can stretch out and draw back along with rotation of the protective shell.

Description

Technical Field

[0001] The invention belongs to the technical field of light beam scanning, and in particular relates to an alpha-beta light beam scanning device. Background Art

[0002] The α-β scanning method is a beam scanning method in which the laser spot completes the scanning motion in a concentric circle trajectory. Compared with the traditional raster scanning, the circular field of view obtained by the α-β scanning method is consistent with the field of view of the optical system, which can make full use of the effective field of view of the optical system and maximize the scanning field of view of the confocal microscope system without redundant scanning; in addition, since the sinusoidal signal is used as the galvanometer control signal, it can not only increase the scanning speed but also reduce the impact on the galvanometer, thereby improving the reliability of the galvanometer system and extending the service life of the galvanometer system.

[0003] When the α-β beam scanning device scans an object, it needs to transmit the collected data and images through the transmission line, and the scanning device needs to be powered by the power cord. Too many cables will be cross-entangled, which not only affects the appearance, but also may be pulled by external factors, causing the cables to loosen, thereby affecting the normal use of the beam scanning device. Summary of the invention

[0004] The object of the present invention is to provide an α-β beam scanning device to solve the problem proposed in the above background technology that too many cables will be cross-entangled, which not only affects the appearance, but also may be pulled by external factors, causing the cables to loosen, thereby affecting the normal use of the beam scanning device.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an α-β beam scanning device, comprising two support boxes and a connecting box fixed between the two support boxes, the surfaces of the two support boxes are fixed with support sleeves, a lifting screw is rotatably connected in the support sleeve, and a guide sleeve is threadedly connected to the outer wall of the lifting screw, and the opposite surfaces of the two guide sleeves are fixed with fixed boxes, a stepping motor is installed in one of the fixed boxes, and a protective shell is fixed to the output end of the stepping motor, and a scanner is installed in the protective shell;

[0006] Fixed blocks are fixed to the outer walls of both sides of the protective shell, and a protective plate is rotatably connected between the two fixed blocks through a rotating shaft. A protective cover is installed on the outer wall of the other fixed box, and a linear reciprocating motor is arranged in the protective cover, and two limit rods and an electric telescopic rod are respectively installed on the workbench of the linear reciprocating motor, a connecting plate is fixed to the output end of the electric telescopic rod, and a plurality of fixed sleeves are fixed to the outer wall of one side of the connecting plate, a supporting spring is arranged in the fixed sleeve, and a limiting pin movably connected to the fixed sleeve is arranged on one side of the supporting spring.

[0007] In a further embodiment, a laser transmitter, a pulse generator, an optical amplifier, an optical splitter, a transmitting lens, a receiving lens and a CCD camera are installed in sequence in the scanner.

[0008] In a further embodiment, a dual-axis motor is installed on the bottom wall of the inner cavity of the connection box, and both output ends of the dual-axis motor are fixed with a driving shaft extending into the support box.

[0009] In a further embodiment, a driving bevel gear is fixed to the end surface of the driving shaft, and a driven bevel gear meshing with the driving bevel gear is fixed to the bottom of the lifting screw.

[0010] In a further embodiment, a rotating shaft rotatably connected to the fixed box is fixed to an outer wall of one side of the protective shell, a rotating motor is installed on the outer wall of one of the fixed blocks, and the output shaft of the rotating motor is fixedly connected to the protective plate.

[0011] In a further embodiment, a plurality of wiring holes are provided on both side outer walls of the protective cover, and a plurality of rotation grooves are provided in the protective cover outside the wiring holes, and sliding balls are rotatably connected in the rotation grooves of the protective cover.

[0012] In a further embodiment, mounting blocks are fixed to the outer walls on both sides of the protective cover, and threaded holes are formed on the mounting blocks.

[0013] In a further embodiment, limiting sliding blocks are fixed to both side outer walls of the guide sleeve, and both side inner walls of the support sleeve are provided with limiting sliding grooves for the limiting sliding blocks to slide.

[0014] In a further embodiment, a plurality of fixing holes are formed on the two limiting rods, and a plurality of moving holes for the fixing sleeve to move are formed on an outer wall of one side of the limiting rod.

[0015] Technical effects and advantages of the present invention:

[0016] The α-β beam scanning device can avoid the cable being exposed to the outside and affecting the appearance by storing the redundant cable in the protective cover, and can also avoid the external force directly acting on the cable, causing the cable to loosen and affecting the normal use of the scanning device. At the same time, the support spring supports the limit pin so that the limit pin is pressed on the surface of the cable, which can fix the position of the cable. When the external force acts, it can also prevent the cable from moving, thereby ensuring the stability of the cable.

[0017] The optical amplifier can amplify the light signal emitted from the laser transmitter to ensure the quality of the light signal, and then the light is divided into multiple paths through the optical splitter. The multiple paths of light are simultaneously projected onto the scanned object to ensure the accuracy of the scan. At the same time, in the process of receiving the light signal, the angle and distance information of multiple lines can also be obtained, which can accurately describe the scanned object and improve the scanning accuracy and quality. At the same time, the delayed phase compensation is added to the control signal to suppress the adverse effects of the phase delay in advance. It has the advantage of real-time correction of imaging distortion caused by phase delay, without the need for software compensation later;

[0018] The electric telescopic rod drives the connecting plate and the fixed sleeve to move, thereby driving the limit pin to move, so that the limit pin is pressed against the surface of the cable, thereby fixing the position of the cable. In the process of continuous movement of the electric telescopic rod, the limit pin squeezes the support spring, so that the limit pin moves in the fixed sleeve. The position of the limit pin in the fixed sleeve can be adjusted according to the size of the cable, so that cables of different sizes can be fixed to meet the needs of fixing different cables.

[0019] The stepper motor drives the protective shell to rotate, and the angle of the scanner can be flexibly adjusted according to the scanning requirements to meet different scanning requirements. At the same time, during the rotation of the scanner, the linear reciprocating motor works to pull the cable, so that the cable can be extended and retracted according to the rotation of the scanner, avoiding the situation where too much cable is exposed or the cable is too short to limit the rotation of the scanner, so that the cable length from the linear reciprocating motor workbench to the scanner connection remains unchanged;

[0020] The protective plate is driven to rotate by a rotary motor. After the scanner finishes working, the protective plate is attached to one side of the scanner to protect the scanner and prevent foreign objects from directly contacting the scanner.

[0021] The dual-axis motor can simultaneously drive the two lifting screws to rotate, thereby driving the guide sleeve to rise and fall. The height of the scanner can be adjusted according to the position of the scanned object to meet different scanning requirements. The α-β beam scanning device can reduce the scanning image reconstruction error and image distortion, and is convenient for storing cables, and the cables can be extended and retracted following the rotation of the protective shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 is a cross-sectional view of a support box and a support sleeve of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the protective shell of the present invention;

[0026] Figure 4 is a cross-sectional view of the protective shell and the scanner of the present invention;

[0027] Figure 5 It is a schematic structural diagram of the protective cover of the present invention;

[0028] Figure 6 For the present invention Figure 5 The enlarged view of point A in the middle;

[0029] Figure 7 It is a structural schematic diagram of the linear reciprocating motor of the present invention;

[0030] Figure 8 It is a schematic structural diagram of the limiting rod of the present invention;

[0031] Fig. 9 It is an exploded view of the fixing sleeve of the present invention.

[0032] In the figure: 1. Support box; 2. Connecting box; 3. Dual-axis motor; 4. Driving shaft; 5. Active bevel gear; 6. Support sleeve; 7. Lifting screw; 8. Driven bevel gear; 9. Guide sleeve; 10. Fixed box; 11. Protective shell; 12. Scanner; 13. Stepper motor; 14. Rotating shaft; 15. Fixed block; 16. Rotating motor; 17. Protective plate; 18. Protective cover; 19. Mounting block; 20. Sliding ball; 21. Linear reciprocating motor; 22. Limit rod; 23. Electric telescopic rod; 24. Connecting plate; 25. Fixed sleeve; 26. Support spring; 27. Limit pin. DETAILED DESCRIPTION

[0033] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0034] Unless otherwise defined, the up, down, left, right, front, back, inside and outside directions involved in this document are based on the up, down, left, right, front, back, inside and outside directions in the figures shown in the present invention, and are explained here together.

[0035] See also Figure 1-9The present invention provides an α-β beam scanning device, comprising two support boxes 1 and a connecting box 2 fixed between the two support boxes 1, a double-axis motor 3 is installed on the bottom wall of the inner cavity of the connecting box 2 by bolts, two output ends of the double-axis motor 3 are fixed with a driving shaft 4 extending into the support box 1 by a coupling, an active bevel gear 5 is fixed on the end surface of the driving shaft 4, support sleeves 6 are welded on the surfaces of the two support boxes 1, a lifting screw 7 is rotatably connected in the support sleeve 6 by a welded bearing, and a bearing that is connected to the active bevel gear is welded at the bottom of the lifting screw 7. 5, and the outer wall of the lifting screw 7 is threadedly connected with a guide sleeve 9, and the outer walls of both sides of the guide sleeve 9 are welded with limit sliders, and the inner walls of both sides of the support sleeve 6 are provided with limit slide grooves for the limit sliders to slide, and the limit sliders slide in the limit slide grooves of the support sleeve 6 to limit the moving distance of the guide sleeve 9. The direction of the thread grooves of the two active bevel gears 5, the driven bevel gear 8 and the outer wall of the lifting screw 7 can be set according to actual use requirements, and when the dual-axis motor 3 is working, it is ensured that the two guide sleeves 9 are lifted and lowered synchronously;

[0036] The opposite surfaces of the two guide sleeves 9 are fixed with a fixing box 10 by bolts, a stepper motor 13 is installed in one fixing box 10 by bolts, and a protective shell 11 is welded and fixed at the output end of the stepper motor 13, a scanner 12 is installed in the protective shell 11 by bolts, and a laser transmitter, a pulse generator, an optical amplifier, an optical splitter, a transmitting lens, a receiving lens and a CCD camera are installed in the scanner 12 in sequence, the optical amplifier can amplify the light signal emitted from the laser transmitter to ensure the quality of the light signal, and then divide the light into multiple paths through the optical splitter, and the multiple paths of light are simultaneously projected on the scanned object, which can ensure the accuracy of the scanning, and in the process of receiving the light signal, the angle and distance information of multiple lines can also be obtained, which can accurately describe the scanned object, improve the scanning accuracy and scanning quality, and the image of the scanned object can be captured by the CCD camera;

[0037] A through hole for the cable to move is provided on one side of the outer wall of the protective shell 11, and a constant angular velocity α-β scanning method is used to complete the scanning and imaging of the orthogonal grid grating sample, that is, a sinusoidal signal with a frequency of f and an initial phase of 0 and π / 2 is used to control the current detection galvanometer system, deflect the laser beam scanning, and confirm the rotation angle θ of the scanning image according to the relative position relationship between the scanning image reconstructed using the target trajectory and the image captured by the CCD, and convert the angle θ into radians φ, where φ is the delay phase size at the frequency of f, and repeat the above steps to obtain the delay phase size φk at different frequencies fk. According to the multiple groups of measurement results obtained in the above steps, the f-φ function relationship is fitted, that is, the scanning frequency and the phase delay function relationship, and the delayed phase compensation is added to the control signal to suppress the adverse effects caused by the phase delay in advance, which has the advantage of real-time correction of imaging distortion caused by phase delay, and no software compensation is required later;

[0038] A rotating shaft 14 rotatably connected to the fixed box 10 is welded on one side of the outer wall of the protective shell 11. The dual-axis motor 3 can simultaneously drive the two lifting screws 7 to rotate, thereby driving the guide sleeve 9 to move up and down. The height of the scanner 12 is adjusted according to the position of the scanned object. The protective shell 11 is driven to rotate by the stepping motor 13. The angle of the scanner 12 can be flexibly adjusted according to the scanning requirements, thereby meeting different scanning requirements and being more flexible and convenient to use.

[0039] The outer walls of both sides of the protective shell 11 are welded with fixed blocks 15, and a protective plate 17 is rotatably connected between the two fixed blocks 15 through a rotating shaft. A rotating motor 16 is installed on the outer wall of one fixed block 15 through bolts, and the output shaft of the rotating motor 16 is fixedly connected to the protective plate 17. The protective plate 17 is driven to rotate by the rotating motor 16. After the scanner 12 finishes working, the protective plate 17 is attached to one side of the scanner 12 to protect the scanner 12 and prevent foreign objects from directly contacting the scanner 12.

[0040] A protective cover 18 is installed on the outer wall of another fixed box 10 by bolts, and mounting blocks 19 are welded on the outer walls on both sides of the protective cover 18. Threaded holes are provided on the mounting blocks 19 to facilitate the disassembly and assembly of the protective cover 18. A linear reciprocating motor 21 is arranged in the protective cover 18. The linear reciprocating motor 21 is fixed to the outer wall of the fixed box 10 by bolts, and two limit rods 22 and an electric telescopic rod 23 are respectively installed on the working table of the linear reciprocating motor 21 by bolts. A connecting plate 24 is fixed to the output end of the electric telescopic rod 23 by bolts, and a plurality of fixing sleeves 25 are fixed to the outer wall of one side of the connecting plate 24 by bolts. A supporting spring 26 is arranged in the fixing sleeve 25, and the supporting spring 26 is arranged in the fixing sleeve 25. A limit pin 27 movably connected to the fixed sleeve 25 is provided on one side of the support spring 26. A plurality of fixing holes for placing cables are provided on both limit rods 22, and a plurality of moving holes for moving the fixed sleeve 25 are provided on one side outer wall of the limit rod 22. By storing the redundant cables in the protective cover 18, it is possible to avoid the cables being exposed to the outside, which affects the appearance, and to avoid external forces acting directly on the cables, causing the cables to loosen and affect the normal use of the scanning device. At the same time, the support spring 26 supports the limit pin 27, so that the limit pin 27 is pressed on the surface of the cable to fix the position of the cable. When an external force acts, it is also possible to avoid the cable from moving, thereby ensuring the stability of the cable.

[0041] The electric telescopic rod 23 drives the connecting plate 24 and the fixed sleeve 25 to move, thereby driving the limit pin 27 to move, so that the limit pin 27 is pressed against the surface of the cable, thereby fixing the position of the cable, and in the continuous movement of the electric telescopic rod 23, the limit pin 27 squeezes the support spring 26, so that the limit pin 27 moves in the fixed sleeve 25, and the position of the limit pin 27 in the fixed sleeve 25 can be adjusted according to the size of the cable, so that cables of different sizes can be fixed to meet the needs of fixing different cables. A plurality of wiring holes are provided on the outer walls of both sides of the protective cover 18, and the outer sides of the wiring holes are provided with a plurality of wiring holes. A plurality of rotating grooves are provided in the protective cover 18, and a sliding ball 20 is rotatably connected in the rotating groove of the protective cover 18. The cable moves outside the limit ball, which can make the cable move more smoothly and avoid the cable jamming phenomenon that affects the rotation of the protective shell 11. During the rotation of the scanner 12, the linear reciprocating motor 21 works to pull the cable, so that the cable is extended and retracted according to the rotation of the scanner 12, avoiding the situation where the cable is exposed too much or the cable restricts the rotation of the scanner 12, so that the cable length from the workbench of the linear reciprocating motor 21 to the connection point of the scanner 12 remains unchanged.

[0042] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The control method of the present invention is controlled by a controller, and the control circuit of the controller can be realized by simple programming by technicians in this field. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0043] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] Working principle:

[0045] When the α-β beam scanning device is in use, multiple groups of cables are passed through the fixing holes of the limit rod 22 and connected to the scanner 12. At the same time, a certain length of cables is reserved and placed in the protective cover 18. The electric telescopic rod 23 is started to drive the connecting plate 24 and the fixing sleeve 25 to move, thereby driving the limit pin 27 to move, so that the limit pin 27 is pressed on the surface of the cable, thereby fixing the position of the cable. In the process of continuous movement of the electric telescopic rod 23, the limit pin 27 squeezes the support spring 26, so that the limit pin 27 moves in the fixing sleeve 25. According to the size of the cable, the position of the limit pin 27 in the fixing sleeve 25 is adjusted, so that cables of different sizes can be fixed to meet the needs of fixing different cables.

[0046] The dual-axis motor 3 is started to drive the driving shaft 4 and the active bevel gear 5 to rotate. The active bevel gear 5 drives the lifting screw 7 to rotate through the driven bevel gear 8, thereby driving the guide sleeve 9 to move. According to the items to be scanned, the scanner 12 is moved to a suitable height. At the same time, the stepping motor 13 is started to drive the protective shell 11 to rotate. According to the scanning requirements, the scanning angle of the scanner 12 is adjusted. During the rotation of the scanner 12, the linear reciprocating motor 21 works to pull the cable so that the cable can be extended and retracted according to the rotation of the scanner 12. After the height and angle of the scanner 12 are adjusted, the scanner 12 is used to The object is scanned, and the optical amplifier amplifies the light signal emitted from the laser transmitter to ensure the quality of the light signal, and then the light is divided into multiple paths through the optical splitter. The multiple paths of light are simultaneously projected onto the scanned object to ensure the accuracy of the scan. At the same time, in the process of receiving the light signal, the angle and distance information of multiple lines can also be obtained to accurately describe the scanned object and improve the scanning accuracy and scanning quality. After the scanning is completed, the rotary motor 16 is started to drive the protective plate 17 to rotate, so that the protective plate 17 is attached to one side of the scanner 12 to protect the scanner 12 and prevent foreign objects from directly contacting the scanner 12.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An α-β beam scanning device, comprising two support boxes (1) and a connecting box (2) fixed between the two support boxes (1), characterized in that: A support sleeve (6) is fixed on the surface of the two support boxes (1), a lifting screw (7) is rotatably connected inside the support sleeve (6), and a guide sleeve (9) is threadedly connected to the outer wall of the lifting screw (7), and a fixed box (10) is fixed on the opposite surface of the two guide sleeves (9), a stepping motor (13) is installed in one of the fixed boxes (10), and a protective shell (11) is fixed to the output end of the stepping motor (13), and a scanner (12) is installed in the protective shell (11); The outer walls of both sides of the protective shell (11) are fixed with fixed blocks (15), and a protective plate (17) is rotatably connected between the two fixed blocks (15) via a rotating shaft. The outer wall of the other fixed box (10) is installed with a protective cover (18), and a linear reciprocating motor (21) is arranged in the protective cover (18). Two limit rods (22) and an electric telescopic rod (23) are respectively installed on the working table of the linear reciprocating motor (21). The output end of the electric telescopic rod (23) is fixed with a connecting plate (24), and a plurality of fixed sleeves (25) are fixed to the outer wall of one side of the connecting plate (24). A supporting spring (26) is arranged in the fixed sleeve (25), and a limit pin (27) movably connected to the fixed sleeve (25) is arranged on one side of the supporting spring (26).

2. The α-β beam scanning device according to claim 1, characterized in that: The scanner (12) is sequentially equipped with a laser transmitter, a pulse generator, an optical amplifier, an optical splitter, a transmitting lens, a receiving lens and a CCD camera.

3. The α-β beam scanning device according to claim 1, characterized in that: A dual-shaft motor (3) is installed on the bottom wall of the inner cavity of the connection box (2), and a driving shaft (4) extending into the support box (1) is fixed to both output ends of the dual-shaft motor (3).

4. The α-β beam scanning device according to claim 3, characterized in that: A driving bevel gear (5) is fixed to the end surface of the driving shaft (4), and a driven bevel gear (8) meshing with the driving bevel gear (5) is fixed to the bottom of the lifting screw (7).

5. The α-β beam scanning device according to claim 1, characterized in that: A rotating shaft (14) rotatably connected to the fixed box (10) is fixed to one side outer wall of the protective shell (11), a rotating motor (16) is installed on the outer wall of one of the fixed blocks (15), and the output shaft of the rotating motor (16) is fixedly connected to the protective plate (17).

6. The α-β beam scanning device according to claim 1, characterized in that: The outer walls on both sides of the protective cover (18) are provided with a plurality of wiring holes, and the protective cover (18) outside the wiring holes is provided with a plurality of rotation grooves, and sliding balls (20) are rotatably connected in the rotation grooves of the protective cover (18).

7. The α-β beam scanning device according to claim 6, characterized in that: Mounting blocks (19) are fixed to the outer walls on both sides of the protective cover (18), and threaded holes are provided on the mounting blocks (19).

8. The α-β beam scanning device according to claim 1, characterized in that: The outer walls on both sides of the guide sleeve (9) are fixed with limit slide blocks, and the inner walls on both sides of the support sleeve (6) are provided with limit slide grooves for the limit slide blocks to slide.

9. The α-β beam scanning device according to claim 1, characterized in that: A plurality of fixing holes are provided on the two limiting rods (22), and a plurality of moving holes for the fixing sleeve (25) to move are provided on an outer wall of one side of the limiting rod (22).

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