Anti-vibration and anti-shake component, handheld microscope and anti-vibration and anti-shake method

Abstract

The present invention discloses an anti-vibration and anti-shake component, which belongs to the field of microscope technology, and includes an image sensor component, a mounting frame, a driving coil, a magnet, and a position sensor. The magnet is mounted on the mounting frame, and the position sensor is mounted on the image sensor component and detects the position of the image sensor component in the magnetic field generated by the magnet. The driving coil is located in the magnetic field of the magnet, and the driving coil is connected to the image sensor component. The driving coil drives the image sensor component to move compensatingly through current changes to achieve optical anti-vibration, and the overall volume is small, the weight is light, and the integration is high. The present invention also relates to a handheld microscope including the anti-vibration and anti-shake component and an anti-vibration and anti-shake method for a handheld microscope.

Description

Technical Field

[0001] The invention relates to microscope technology, and in particular to an anti-vibration and anti-shake component, a handheld microscope and an anti-vibration and anti-shake method. Background Art

[0002] Microscope optical systems have the characteristics of large magnification (usually up to 150X-500X) and small depth of field (<2μm). Because the magnification is very large, when observing objects, the displacement (also known as jitter) between the microscope and the object often causes image blur and defocus problems, making the final image unclear.

[0003] In order to obtain stable imaging of microscopic optics, the currently used effective anti-vibration and anti-shake method is to place the microscope on an anti-vibration table and place the sample on a sample moving table to isolate the operator and the environment from the vibration of the microscope imaging. These devices occupy a considerable space (more than 1mx1m) and are very heavy (30-50kg). This traditional anti-vibration method has poor integration due to its large size and weight, and placing the sample on an anti-vibration table does not meet the application requirements of live handheld microscopes. Therefore, it is urgent to find a new anti-vibration and anti-shake solution for this type of micro-microscope system. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide an anti-vibration and anti-shake component with small size, light weight and high integration.

[0005] In order to overcome the deficiencies of the prior art, a second object of the present invention is to provide a handheld microscope that is shockproof and shake-proof and has a small size, light weight, and high integration.

[0006] In order to overcome the deficiencies of the prior art, the third object of the present invention is to provide a method for achieving anti-vibration and anti-shake for a handheld microscope on the basis of small size, light weight and high integration.

[0007] One of the purposes of the present invention is achieved by the following technical solution:

[0008] An anti-vibration and anti-shake component includes an image sensor component, a mounting frame, a drive coil, a magnet, and a position sensor. The magnet is mounted on the mounting frame, and the position sensor is mounted on the image sensor component and detects the position of the image sensor component in the magnetic field generated by the magnet. The drive coil is located in the magnetic field of the magnet and is connected to the image sensor component. The drive coil drives the image sensor component to perform compensatory movement through current changes.

[0009] Furthermore, the driving coil is divided into two groups, and the two groups of driving coils are symmetrically arranged. The two groups of driving coils respectively drive the image sensor component to move along two mutually perpendicular first directions and second directions. The number of the position sensors is two, and the two position sensors are respectively arranged in the first direction and the second direction.

[0010] Furthermore, the number of the magnets is four, the four magnets surround the image sensor assembly and are distributed at an angle of 45 degrees, the number of the drive coils is four, and the positions of the four drive coils are also distributed at an angle of 45 degrees corresponding to the magnets.

[0011] Furthermore, the image sensor assembly includes a sensor body and a sensor coil, the sensor body is connected to the sensor coil, the anti-vibration and anti-shake assembly also includes a voice coil motor, the sensor coil is located inside the voice coil motor, and the sensor coil is energized to drive the sensor body to move in a third direction perpendicular to the first direction and the second direction.

[0012] Furthermore, the anti-vibration and anti-shake assembly also includes an elastic member and a mounting frame, the image sensor assembly is located in the mounting frame, the elastic member includes a first spring sheet and a second spring sheet, the first spring sheet is installed between the mounting frame and the image sensor assembly, the second spring sheet is located between the mounting frame and the image sensor assembly, the first spring sheet and the second spring sheet are arranged along the third direction, and the image sensor assembly respectively contacts the first spring sheet and the second spring sheet when moving to two extreme positions in the third direction.

[0013] Furthermore, the first spring sheet and the second spring sheet are respectively located at two ends of the image sensor component and the first spring sheet and the second spring sheet are parallel to each other.

[0014] Furthermore, the position sensor includes a Hall element, a linear amplifier and an emitter follower. The position sensor measures the magnetic field component of the magnetic field generated by the magnet in a certain direction, and calculates the direction and distance of the image sensor component jitter based on the amplitude and direction of the change in the intensity of the magnetic field component.

[0015] The second object of the present invention is achieved by adopting the following technical solution:

[0016] A handheld microscope comprises any one of the above-mentioned anti-vibration and anti-shake components.

[0017] The third object of the present invention is achieved by adopting the following technical solution:

[0018] A method for preventing vibration and trembling of a handheld microscope comprises the following steps:

[0019] Use the endoscope to obtain real-time images of the microscope, and use the position sensor to detect the shaking direction and amplitude of the endoscope in real time;

[0020] Collect data from the position sensor, image sensor, and voice coil motor, process the data to obtain the direction, speed, and movement signals of the jitter, and calculate the image sensor movement amount required to offset the jitter;

[0021] Controlling the flow direction of the current in the driving coil according to the calculated movement amount of the image sensor to attract or repel the corresponding magnet, so that a relative movement is generated between the driving coil and the magnet, thereby moving the image sensor in a first direction and a second direction perpendicular to each other;

[0022] The current of the sensor coil is controlled so that the sensor coil moves relative to the voice coil motor in a third direction perpendicular to the first direction and the second direction, thereby achieving automatic focusing of the microscope.

[0023] Furthermore, the position sensor is used to detect the jitter direction and amplitude of the endoscope in real time. Specifically, the position sensor is located in the magnetic field generated by the magnet, and the position sensor measures the magnetic field component of the magnetic field generated by the magnet in a certain direction. According to the amplitude and direction of the change in the intensity of the magnetic field component, the direction and amplitude of the jitter of the image sensor component are calculated.

[0024] Compared with the prior art, the magnet of the anti-vibration and anti-shake assembly of the present invention is installed on the installation frame, and the position sensor is installed on the image sensor assembly and detects the position of the image sensor assembly in the magnetic field generated by the magnet. The driving coil is located in the magnetic field of the magnet, and the driving coil is connected to the image sensor assembly. The driving coil drives the image sensor assembly to perform compensatory movement through current changes to achieve optical image stabilization, and the overall size is small, the weight is light, and the integration is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a stereogram of the handheld microscope of the present invention;

[0026] Figure 2 for Figure 1 An exploded view of a handheld microscope;

[0027] Figure 3 for Figure 1 A stereoscopic view of the anti-vibration and anti-shake components of a handheld microscope;

[0028] Figure 4 for Figure 3 An exploded view of the anti-vibration and anti-shake components;

[0029] Figure 5 for Figure 3 A three-dimensional cross-sectional view of an anti-vibration and anti-shake component;

[0030] Figure 6for Figure 3 Schematic diagram of the internal structure of the anti-vibration and anti-shake components.

[0031] In the figure: 10, cable guide; 20, outer shell; 21, front shell; 22, middle shell; 23, bottom shell; 30, operation button; 40, lens support; 50, relay mirror; 60, light source interface; 70, mirror sheath; 80, anti-vibration and anti-shake assembly; 81, cover; 810, upper cover; 811, bottom cover; 82, mounting frame; 820, top bracket; 821, bottom bracket; 823, suspension wire; 83, mounting frame; 84, drive coil; 85, magnet; 86, position sensor; 87, elastic member; 870, first spring piece; 871, second spring piece; 88, image sensor assembly; 880, sensor body; 881, circuit board; 882, sensor coil; 89, voice coil motor. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be another intermediate component through which it is fixed. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be another intermediate component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be another intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0035] Figures 1 to 6 The handheld microscope of the present application includes a cable guide 10 , a housing 20 , an operation button 30 , a lens support 40 , a relay lens 50 , a light source interface 60 , a lens sheath 70 and an anti-vibration and anti-shake assembly 80 .

[0036] The cable guide 10 is mounted on the housing 20 .

[0037] The housing 20 includes a front housing 21, a middle housing 22 and a bottom housing 23. The front housing 21, the middle housing 22 and the bottom housing 23 are fixedly connected in sequence to form a hollow cavity structure.

[0038] The operation button 30 is mounted on the top of the middle housing 22 .

[0039] The lens support 40 is mounted on the front housing 21 .

[0040] The relay lens 50 is mounted on an end portion of the lens support 40 .

[0041] The light source interface 60 is mounted on the relay mirror 50 , and the mirror sheath 70 is mounted on the light source interface 60 .

[0042] The anti-vibration and anti-shake assembly 80 is installed inside the housing 20 .

[0043] The anti-vibration and anti-shake assembly 80 includes a cover 81 , a mounting bracket 82 , a mounting frame 83 , a driving coil 84 , a magnet 85 , a position sensor 86 , an elastic member 87 , an image sensor assembly 88 and a voice coil motor 89 .

[0044] The cover body 81 includes an upper cover 810 and a bottom cover 811. Both the upper cover 810 and the bottom cover 811 are provided with a circular hole. The circular hole of the upper cover 810 is used for the sensor body 880 to acquire an image. The upper cover 810 is fixedly connected to the bottom cover 811. A cavity is formed between the upper cover 810 and the bottom cover 811 for accommodating the mounting frame 82, the mounting frame 83, the driving coil 84, the magnet 85, the position sensor 86, the elastic member 87, the image sensor assembly 88 and the voice coil motor 89.

[0045] The mounting frame 82 includes a top bracket 820, a bottom bracket 821 and a suspension wire 823. The top bracket 820 and the bottom bracket 821 are detachably connected, and a cavity is formed between the top bracket 820 and the bottom bracket 821 for accommodating the mounting frame 83, the driving coil 84, the magnet 85, the position sensor 86, the elastic member 87, the image sensor assembly 88 and the voice coil motor 89. The suspension wire 823 is fixed to the bottom bracket 821, and when the top bracket 820 moves relative to the bottom bracket 821 and moves to the extreme position, the top bracket 820 conflicts with the suspension wire 823, limiting the moving range of the top bracket 820.

[0046] The mounting frame 83 is used to fix the magnet 85 .

[0047] There are four drive coils 84, which are respectively connected to the image sensor assembly 88. The four drive coils 84 are evenly distributed around the image sensor assembly 88, and the angle between two adjacent drive coils 84 is 45 degrees. The four drive coils 84 are respectively located in two mutually perpendicular directions, which are respectively a first direction and a second direction.

[0048] There are four magnets 85, which are evenly fixed at the four corners of the bottom bracket 821, and the angle between two adjacent magnets 85 is 45 degrees. The four magnets 85 are respectively located in two mutually perpendicular directions, and the two mutually perpendicular directions are respectively a first direction and a second direction. The first direction and the second direction form a plane perpendicular to the mirror sheath 70. The four trapezoidal magnets 85 are installed in a layout with the N pole facing outward and the S pole facing the image sensor assembly 88. By alternately changing the direction of the current in the drive coil 84, the drive coil 84 and the magnet 85 can generate relative motion. Since the drive coil 84 is connected to the image sensor assembly 88, the image sensor assembly 88 is pushed to perform compensatory motion.

[0049] There are two position sensors 86, which are respectively arranged in the first direction and the second direction. The position sensor 86 is a linear Hall sensor, and the position sensor 86 detects the position information of the image sensor assembly 88 in real time. The position sensor 86 includes a Hall element, a linear amplifier and an emitter follower. The position sensor 86 is used to measure the magnetic field component of the magnetic field generated by the magnet in a certain direction, and calculate the direction and distance of the jitter according to the amplitude and direction of the change in the intensity of the magnetic field component. When the position sensor 86 moves relative to the magnet 85 in the magnetic field line, the intensity of the magnetic field component in the first direction and the second direction detected by it will change, and the direction and amplitude of the compensation movement will be obtained after filtering, amplifying and analog-to-digital conversion of the changed signal.

[0050] The elastic member 87 includes a first spring piece 870 and a second spring piece 871. The first spring piece 870 is installed between the image sensor assembly 88 and the mounting frame 83, and the second spring piece 871 is installed between the image sensor assembly 88 and the bottom bracket 821. When the image sensor assembly 88 moves in a third direction perpendicular to the first direction and the second direction, when the image sensor assembly 88 moves to two extreme positions, the image sensor assembly 88 respectively contacts the first spring piece 870 and the second spring piece 871, thereby playing a buffering role and maintaining the stability of the image sensor assembly 88.

[0051] The image sensor assembly 88 includes a sensor body 880, a circuit board 881 and a sensor coil 882. The sensor body 880 is a CMOS sensor. The circuit board 881 is electrically connected to the sensor body 880 to provide power for the sensor body 880. The sensor coil 882 drives the sensor body 880 to move in the third direction.

[0052] The voice coil motor 89 is used to drive the image sensor assembly 88 to move in the third direction. The sensor coil 882 of the image sensor assembly 88 is accommodated in the voice coil motor 89 .

[0053] When using the handheld microscope of the present application, an endoscope is used to obtain real-time images, and a position sensor 86 is used to detect the shaking direction and amplitude of the endoscope in real time; three sets of data of the position sensor 86, the image sensor assembly 88 and the voice coil motor 89 are collected in parallel, and the data are processed in parallel at high speed to obtain the shaking direction, speed and movement amount signals, and finally the movement amount of the sensor body 880 that needs to offset the shaking is calculated; the logic control timing is designed according to the calculated compensation amount, and multiple timing flows accurately control the flow direction of the current in the drive coil 84 at the ns level to attract or repel the corresponding magnet 85, generating relative movement between the drive coil 84 and the magnet 85; the drive coil 84 is used to realize the compensation movement of the image sensor assembly 88 in the xy plane of the optical axis (the plane formed by the first direction and the second direction) through the current; the sensor coil 882 is used to realize the automatic focusing movement of the image sensor assembly 88 in the z direction (the third direction) orthogonal to the optical axis. When the image processing function is iterated to the maximum clarity, the mechanical motion focusing is completed and a clear and stable image is output, and finally optical image stabilization and automatic focusing are realized.

[0054] The present invention also relates to a handheld microscope anti-vibration and anti-shake method implemented by the handheld microscope, comprising the following steps:

[0055] The endoscope is used to obtain a real-time image of the microscope, and the position sensor 86 is used to detect the shaking direction and amplitude of the endoscope in real time;

[0056] Collect data from the position sensor 86, the image sensor and the voice coil motor 89, process the data to obtain the direction, speed and movement amount signals of the jitter, and calculate the image sensor movement amount required to offset the jitter;

[0057] According to the calculated movement amount of the image sensor, the flow direction of the current in the driving coil 84 is controlled to attract or repel the corresponding magnet 85, so that a relative movement is generated between the driving coil 84 and the magnet 85, thereby moving the image sensor in a first direction and a second direction perpendicular to each other;

[0058] By controlling the current of the sensor coil 882, the sensor coil 882 is moved relative to the voice coil motor 89 in a third direction perpendicular to the first direction and the second direction, thereby achieving automatic focusing of the microscope.

[0059] Furthermore, the position sensor 86 is used to detect the jitter direction and amplitude of the endoscope in real time. Specifically, the position sensor 86 is located in the magnetic field generated by the magnet 85, and the position sensor 86 measures the magnetic field component of the magnetic field generated by the magnet 85 in a certain direction, and calculates the direction and amplitude of the jitter of the image sensor component 88 according to the amplitude and direction of the change in the intensity of the magnetic field component.

[0060] Under the premise of realizing anti-vibration and anti-shake of the handheld microscope, the present application provides a handheld microscope with small size, light weight and high integration.

[0061] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which are equivalent modifications and improvements made to the above embodiments based on the essential technology of the present invention, and all of them belong to the protection scope of the present invention.

Claims

1. An anti-vibration and anti-shake component, comprising an image sensor component, characterized in that: The anti-vibration and anti-shake component also includes a mounting frame, a driving coil, a magnet, and a position sensor, wherein the magnet is fixed to the mounting frame, the position sensor is mounted on the image sensor component and detects the position of the image sensor component in the magnetic field generated by the magnet, the driving coil is located in the magnetic field of the magnet, the driving coil is connected to the image sensor component, and the driving coil drives the image sensor component to perform compensatory movement through current changes, the anti-vibration and anti-shake component also includes an elastic member and a mounting frame, the image sensor component is located in the mounting frame, the elastic member includes a first spring sheet and a second spring sheet, the first spring sheet is installed between the mounting frame and the image sensor component, the second spring sheet is located between the mounting frame and the image sensor component, the first spring sheet and the second spring sheet are arranged along a third direction perpendicular to the direction of the compensatory movement, and the image sensor component includes a sensor main The sensor body and the sensor coil are connected to the sensor coil, the anti-vibration and anti-shake component also includes a voice coil motor, the sensor coil is located in the voice coil motor, the sensor coil is energized to drive the sensor body to move in a third direction, and the image sensor component respectively conflicts with the first spring sheet and the second spring sheet when the third direction moves to two extreme positions, the mounting frame includes a top bracket, a bottom bracket and a suspension wire, the top bracket and the bottom bracket are detachably connected, a cavity is formed between the top bracket and the bottom bracket, the cavity is used to accommodate the mounting frame, the drive coil, the magnet, the position sensor, the elastic member and the image sensor component, the suspension wire is fixed to the bottom bracket, when the top bracket moves relative to the bottom bracket, when it moves to the extreme position, the top bracket conflicts with the suspension wire to limit the movement range of the top bracket.

2. The anti-vibration and anti-shake assembly according to claim 1, characterized in that: The driving coils are divided into two groups, which are symmetrically arranged. The two groups of driving coils respectively drive the image sensor component to move along two mutually perpendicular first directions and second directions. The number of the position sensors is two, and the two position sensors are respectively arranged in the first direction and the second direction.

3. The anti-vibration and anti-shake assembly according to claim 2, characterized in that: There are four magnets, which surround the image sensor assembly and are distributed at an angle of 90 degrees. There are four drive coils, which are also distributed at an angle of 90 degrees to the magnets.

4. The anti-vibration and anti-shake assembly according to claim 1, characterized in that: The position sensor includes a Hall element, a linear amplifier and an emitter follower. The position sensor measures the magnetic field component of the magnetic field generated by the magnet in a certain direction, and calculates the direction and distance of the image sensor component jitter based on the amplitude and direction of the change in the intensity of the magnetic field component.

5. A handheld microscope, characterized in that: It comprises the anti-vibration and anti-shake component as described in any one of claims 1 to 4.

6. A method for preventing vibration and trembling of a handheld microscope, implemented by using the anti-vibration and anti-trembling component according to any one of claims 1 to 4, characterized in that: The following steps are involved: Use the endoscope to obtain real-time images of the microscope, and use the position sensor to detect the shaking direction and amplitude of the endoscope in real time; Collect data from the position sensor, image sensor, and voice coil motor, process the data to obtain the direction, speed, and movement signals of the jitter, and calculate the image sensor movement amount required to offset the jitter; Controlling the flow direction of the current in the driving coil according to the calculated movement amount of the image sensor to attract or repel the corresponding magnet, so that a relative movement is generated between the driving coil and the magnet, thereby moving the image sensor in a first direction and a second direction perpendicular to each other; The current of the sensor coil is controlled so that the sensor coil moves relative to the voice coil motor in a third direction perpendicular to the first direction and the second direction, thereby achieving automatic focusing of the microscope.

7. The handheld microscope anti-vibration and anti-shake method according to claim 6, characterized in that: The use of a position sensor to detect the direction and amplitude of the endoscope's shaking in real time is specifically as follows: the position sensor is located in the magnetic field generated by a magnet, and the position sensor measures the magnetic field component of the magnetic field generated by the magnet in a certain direction, and calculates the direction and amplitude of the shaking of the image sensor component based on the amplitude and direction of the change in the intensity of the magnetic field component.

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