Element imaging system capable of automatically focusing
Through the design of the autofocus module and imaging module, high-precision autofocus of the photoelectric components is achieved, the problem of precision deviation in the inverted placement of photoelectric components is solved, and the detection accuracy and production efficiency of the imaging system are improved.
Patent Information
- Application Number
- CN202423076813.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-09-06
- Filing Date
- 2024-12-12
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-12-12
AI Technical Summary
In the high-precision inverted placement application of optoelectronic components in the existing technology, the vision system is prone to accuracy deviation and insufficient focusing accuracy, which makes it difficult to meet actual usage requirements.
Provided is an autofocus component imaging system. An autofocus module drives a first lens to automatically focus in a first direction of a photoelectric component, and combines the first lens and a second lens to perform imaging in two directions. The first lens is arranged directly above the vertical direction, and the second lens is arranged directly below. The lens light beams are parallel and independent and do not cross each other. Precise focusing is achieved using components such as a lead screw assembly and a grating ruler.
It reduces imaging errors, improves detection accuracy, facilitates timely detection of optoelectronic component placement errors, and improves imaging accuracy and production efficiency of optoelectronic components.
Smart Images
Figure CN223426921U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photoelectric detection, in particular to a component imaging system capable of automatic focusing. Background Art
[0002] In high-precision inverted placement applications of optoelectronic components (i.e., the upper component does not move, and the lower component is placed upward after visual positioning), high requirements are placed on the relative position and posture of the two components. Generally, an upward vision system installed next to the lower component platform and an upward vision system installed next to the upper component are used for mutual visual calibration. The upper component is then photographed by the upward vision system, and the lower component is photographed by the downward vision system. The relative position between the upper and lower components is calculated before placement is performed.
[0003] Because this method involves the mutual calibration of two vision systems, it's impossible to directly capture the positional deviation between the upper and lower components. Calibration is required before the components are moved to capture and identify features on the components. Furthermore, the vision systems are bulky, placing higher demands on mechanical and motion control. For example, capturing different components separately after mutual calibration requires high-precision motion positioning, and both vision systems must also be highly stable. This ultimately leads to accuracy deviations after long-term use. In existing applications, the upper component remains stationary, and autofocus is driven by the lower component platform to drive the upper vision system. This results in long error paths and insufficient accuracy.
[0004] In the process of implementing the present invention, the applicant discovered that the prior art has at least the following problems:
[0005] In high-precision inverted placement applications of optoelectronic components, the vision system is prone to accuracy deviation and insufficient focusing accuracy, making it difficult to meet actual usage requirements. Utility Model Content
[0006] The purpose of this utility model is to provide an autofocus component imaging system to address the technical problems in the prior art of high-precision inverted placement of optoelectronic components, such as the tendency of vision systems to suffer from accuracy deviations, insufficient focusing accuracy, and difficulty meeting practical application requirements. The various technical effects of the preferred technical solutions provided by this utility model are detailed below.
[0007] To achieve the above objectives, the present invention provides the following technical solutions:
[0008] The utility model provides an element imaging system with automatic focus, which is used to image at least one photoelectric element, and includes an automatic focus module and an imaging module; the automatic focus module drives the first lens to move, so that the first lens automatically focuses in a first direction of the photoelectric element; the imaging module uses the first lens and the second lens arranged relatively to each other to respectively image in the first direction and the second direction of the photoelectric element; the first lens is arranged directly above the vertical direction, and the second lens is arranged directly below the vertical direction, and on the same vertical line; the first lens and the second lens simultaneously image; the first lens obtains a first imaging beam, and the second lens obtains a second imaging beam, the first imaging beam and the second imaging beam are both located in the horizontal direction and parallel to each other, and the first imaging beam is located above the second imaging beam; the beams of the first lens and the second lens are independent of each other and do not cross, are equal in width, and are each half the height of the sensor of the camera in height.
[0009] Preferably, the autofocus module includes a screw assembly and a connecting assembly; the connecting assembly is connected to the first lens, and the screw assembly drives the connecting assembly to move, so that the first lens performs linear reciprocating motion.
[0010] Preferably, the connecting assembly includes a screw nut connecting piece, a first guide rail slider, a ramp block, a stop block and a first lens mounting piece; the screw nut connecting piece is connected to the screw nut and to the first guide rail slider; the first guide rail slider is connected to the ramp block, the ramp surface of the ramp block is connected to the stop block, and the stop block is fixedly connected to the first lens mounting piece; the first lens mounting piece is used to fixedly install the first lens.
[0011] Preferably, the connecting assembly also includes a mounting base, a motor mounting seat, and a second guide rail slider; the mounting base is used to fix the first guide rail slider, the second guide rail slider, and the motor mounting seat, the motor mounting seat is used to install a stepper motor, and the second guide rail slider is connected to the side of the first lens mounting component.
[0012] Preferably, the first lens mounting component is connected to a grating ruler or a displacement sensor; the grating ruler is used to measure the displacement of the first lens mounting component and is provided with a reading head; the displacement sensor is a laser displacement sensor, a mechanical displacement sensor, a linear laser displacement sensor or a laser interferometer.
[0013] Preferably, the screw assembly includes a stepper motor, a screw and a screw nut; the stepper motor drives the screw to rotate, and the rotation of the screw drives the screw nut to perform linear reciprocating motion.
[0014] Preferably, the imaging module includes a first lens, a second lens, a point light source, a right-angled prism, a light source beam splitter and a camera; the first lens and the second lens are separated from each other and arranged facing each other; the right-angled prism is used to generate two 45-degree reflection surfaces, and the light from the point light source is reflected by the right-angled prism into the camera; the light source beam splitter splits the light source and partially enters the first imaging beam of the first lens and is reflected by the right-angled prism to the corresponding focusing surface of the first lens, and then reflected back to the right-angled prism, the first lens imaging beam, and then enters the sensor surface of the camera.
[0015] Preferably, the ratio of the camera sensor in the height direction to the width direction is 2:1, so that the light beam of the first lens and the light beam of the second lens occupy the upper half and the lower half of the camera sensor respectively.
[0016] Preferably, a focusing lens is provided between the light source beam splitter prism and the camera, and the focusing lens forms an image of infinity obtained by the first lens onto the sensor surface of the camera.
[0017] Preferably, the imaging module further includes a base, and the base is used to install and fix the light source beam splitter prism and the camera.
[0018] Implementing one of the above technical solutions of the utility model has the following advantages or beneficial effects:
[0019] The present application uses an autofocus module to enable the first lens to automatically focus in the first direction, and then combines the first lens and the second lens to perform imaging in the first direction and the second direction respectively, and simultaneously captures the effect of the position deviation of the photoelectric element in two directions, thereby reducing the imaging error, improving the detection accuracy, and facilitating the timely and rapid discovery of the photoelectric element mounting error. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:
[0021] Figure 1 This is a front view of an auto-focusing component imaging system according to an embodiment of the present utility model;
[0022] Figure 2 This is a first-perspective stereoscopic diagram of an auto-focusable component imaging system according to an embodiment of the present utility model;
[0023] Figure 3This is a second perspective stereogram of an auto-focusable component imaging system according to an embodiment of the present utility model;
[0024] Figure 4 This is a third-perspective stereoscopic diagram of an auto-focusable component imaging system according to an embodiment of the present utility model;
[0025] In the figure: 1. Autofocus module; 11. Screw assembly; 110. Stepper motor; 111. Screw; 112. Screw nut; 12. Connecting assembly; 120. Screw nut connector; 121. First guide rail slider; 122. Ramp block; 123. Stop block; 124. First lens mounting member; 125. Mounting base; 126. Motor mounting base; 127. Second guide rail slider; 13. Grating scale; 14. Reading head; 2. Imaging module; 21. First lens; 210. First focusing plane; 211. First imaging beam; 22. Second lens; 220. Second focusing plane; 221. Second imaging beam; 23. Point light source; 24. Right-angled prism; 25. Light source spectrometer; 26. Camera; 27. Base. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solutions and advantages of the present invention clearer, the various exemplary embodiments to be described below will refer to the corresponding drawings, which constitute a part of the exemplary embodiments, in which various exemplary embodiments that may be used to implement the present invention are described. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with the present disclosure. It should be understood that they are only examples of processes, methods and devices that are consistent with some aspects of the present disclosure as detailed in the appended claims, and other embodiments may also be used, or structural and functional modifications may be made to the embodiments listed herein without departing from the scope and essence of the present invention.
[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", etc. indicate the orientation or position relationship based on the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the elements referred to must have a specific orientation, be constructed and operate in a specific orientation. The terms "first", "second", etc. are only used for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The term "plurality" means two or more. The terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a communication connection, a direct connection, an indirect connection through an intermediate medium, and can be the internal connection of two elements or the interaction relationship between two elements. The term "and / or" includes any and all combinations of one or more related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.
[0028] In order to illustrate the technical solution of the present invention, a specific embodiment is provided below, in which only the parts related to the embodiment of the present invention are shown.
[0029] Example 1:
[0030] like Figure 1-Figure 4As shown, the present invention provides an autofocus component imaging system for imaging at least one photoelectric component, which can be a fast-axis collimating lens, an inverted mounted photoelectric component, etc., and includes an autofocus module 1 and an imaging module 2. The autofocus module 1 drives the movement of a first lens 21, causing the first lens 21 to autofocus in a first direction of the photoelectric component. The first direction is preferably a vertical direction for imaging from top to bottom. In this case, the photoelectric component is easily fixed and the first lens 21 can also image the upper component of the photoelectric component. The imaging module 2 uses the first lens 21 and the second lens 22 arranged in relative positions to respectively image the photoelectric component in the first and second directions. Preferably, the first lens 21 is arranged directly above the photoelectric component in the vertical direction, and the second lens 22 is arranged directly below the photoelectric component in the vertical direction, and on the same vertical line. This not only facilitates the installation and fixation of the photoelectric component, the first lens 21, and the second lens 22 for imaging operations, but also facilitates imaging operations in both the upper and lower directions of the same position of the photoelectric component. When the photoelectric component is mounted in two positions, the upper and lower components can be imaged simultaneously, which can reduce errors and improve imaging accuracy. Preferably, the first lens 21 and the second lens 22 are imaged at the same time, so that image information of two surfaces of the photoelectric element at the same time can be obtained, thereby reducing errors and improving the accuracy of the visual imaging system. In this embodiment, the first lens is automatically focused in the first direction through the autofocus module, and then the first lens and the second lens are respectively imaged in the first direction and the second direction, so that the position deviation of the photoelectric element can be photographed in two directions at the same time, thereby reducing the imaging error and improving the detection accuracy, which is convenient for the photoelectric element to detect the mounting error of the photoelectric element in a timely and accurate manner. In the application of the fast-axis collimating lens, the light spot requirements of the fast-axis collimating lens in the high-power fiber laser can be directly pre-positioned in the production process of the fast-axis collimating lens, that is, the function and performance test of the fast-axis collimating lens of this embodiment can be performed using the back-end light spot standard, so that the loading and unloading of the fast-axis collimating lens and the coupling test platform can be separated to obtain a shorter production cycle, realize the improvement of the production process and the improvement of production efficiency.
[0031] As an optional implementation, Figure 2 As shown, the autofocus module 1 includes a screw assembly 11 and a connecting assembly 12; the connecting assembly 12 is connected to the first lens 21, and the screw assembly 11 drives the connecting assembly 12 to move. The screw assembly 11 converts the rotational motion of the motor into linear motion, thereby enabling the first lens 21 to perform linear reciprocating motion. The linear reciprocating motion facilitates precise focusing operations on the first lens 21, thereby achieving fast automatic focusing.
[0032] As an optional implementation, Figure 4As shown, the connection assembly 12 includes a screw nut connector 120, a first guide rail slider 121, a ramp block 122, a block 123, and a first lens mounting member 124. The screw nut connector 120 is connected to the screw nut 112, so that the linear reciprocating motion of the screw nut 112 can also drive the screw nut connector 120 to perform synchronous linear reciprocating motion. It is also connected to the first guide rail slider 121, and the first guide rail slider 121 is located in the horizontal direction. Preferably, the screw nut connector 120 and the first guide rail slider 121 are an integrated structure, so that the two can achieve synchronous linear reciprocating motion. The first guide rail slider 121 is connected to the ramp block 122, thereby limiting the movement of the ramp block 122 and ensuring smoother movement. The sloped surface of the ramp block 122 is connected to the stopper 123, preferably by abutment, so that the linear reciprocating motion of the ramp block 122 is converted into the up and down reciprocating motion of the stopper 123. The stopper 123 is preferably a cylindrical stopper to facilitate abutment with the sloped surface of the ramp block 122. The stopper 123 is fixedly connected to the first lens mount 124. Preferably, the stopper 123 is embedded in the first lens mount 124 and engaged, or the two are welded together, so that the up and down motion of the stopper 123 is converted into the up and down motion of the first lens mount 124. The first lens mount 124 is used to securely mount the first lens 21. The up and down motion of the first lens mount 124 drives the first lens 21 to move up and down synchronously, achieving automatic focusing of the first lens 21.
[0033] As an optional implementation, Figure 4 As shown, the connecting assembly 12 also includes a mounting base 125, a motor mounting base 126, and a second guide rail slider 127. The mounting base 125 is used to securely mount the first guide rail slider 121, the second guide rail slider 127, and the motor mounting base 126. The motor mounting base 126 is used to mount a stepper motor. The second guide rail slider 127 is connected to the side of the first lens mounting member 124. Specifically, the guide rail of the second guide rail slider 127 is mounted on the base 27, and the slider is mounted on the first lens mounting member 124 and arranged in a vertical direction. This allows the first lens mounting member 124 to be vertically limited, further ensuring the accuracy of the up and down movement of the first lens mounting member 124 and preventing the first lens 21 from shaking and affecting the imaging effect.
[0034] As an optional implementation, Figure 2As shown, the first lens mounting member 124 is connected with a grating ruler 13 or a displacement sensor, which can be fixed by clamping, gluing, screwing, etc., so as to facilitate real-time acquisition of the displacement change amount of the first lens 21, and the feedback based on the displacement amount can realize automatic focusing of the first lens 21. The grating ruler 13 is used to measure the displacement amount of the first lens mounting member 124, and is provided with a reading head 14, so that the displacement amount of the first lens 21 is more convenient to read. The displacement sensor is a laser displacement sensor, a mechanical displacement sensor, a line laser displacement sensor or a laser interferometer, which can be selected as needed, so as to improve the applicability of the embodiment.
[0035] As an optional implementation, as shown in Figure 4 As shown, the lead screw assembly 11 includes a stepper motor, a lead screw 111 and a lead screw nut 112; the stepper motor drives the lead screw 111 to rotate, and the lead screw 111 drives the lead screw nut 112 to move linearly, and the stepper motor can realize more accurate motion control, so that the linear motion of the lead screw nut 112 can also be more accurately controlled.
[0036] As an optional implementation, as shown in Figure 1 As shown, the imaging module 2 includes a first lens 21, a second lens 22, a point light source 23, a right-angle edge prism 24, a light source beam splitting prism 25 and a camera 26. The first lens 21 and the second lens 22 are separated from each other and arranged oppositely, so that imaging can be performed in two opposite directions at the same time, i.e., a first focusing surface 210 of the first lens 21 and a second focusing surface 220 of the second lens 22 are on the same vertical line. The right-angle edge prism 24 (the right-angle edge prism 24 is an isosceles right triangle) is used to generate two 45-degree reflecting surfaces, and the light of the point light source 23 is reflected into the camera 26 (specifically, into two right-angle edges of the right-angle edge prism 24) through the right-angle edge prism 24, so that the first lens 21 obtains a first imaging light beam 211, and the second lens 22 obtains a second imaging light beam 221, the first imaging light beam 211 and the second imaging light beam 221 are both located in the horizontal direction and parallel to each other, and the first imaging light beam 211 is located above the second imaging light beam 221. The light source beam splitting prism 25 splits the light of the point light source 23 and partially enters the first imaging light beam 211 of the first lens 21 and is reflected to the corresponding focusing surface of the first lens 21 through the right-angle edge prism 24, and then is reflected back to the right-angle edge prism 24 and the imaging light beam of the first lens 21, and then enters the sensor surface of the camera 26. The light source beam splitting prism 25 facilitates the divergence of the light of the point light source 23, so as to provide sufficient brightness conditions for the imaging of the photoelectric element.
[0037] As an optional embodiment, the sensor of camera 26 has a height-to-width ratio of 2:1, so that the light beam from first lens 21 and the light beam from second lens 22 occupy the upper and lower halves of the sensor of camera 26, respectively. That is, the light beams from first lens 21 and second lens 22 are independent and non-intersecting, are equal in width, and each is half the height of the sensor of camera 26 in height. Sharing the same image plane of camera 26 sensor for the light beams from first lens 21 and second lens 22 minimizes errors and improves positioning accuracy and stability. Simultaneously capturing the features of both the upper and lower components provides the simplest error path and achieves the highest positioning accuracy for both components.
[0038] As an optional embodiment, a focusing lens is disposed between the light source beam splitter prism 25 and the camera 26. The focusing lens projects the infinite image obtained by the first lens 21 onto the sensor surface of the camera 26. By adding the focusing lens, this embodiment can clearly image photoelectric components located further away for the camera 26 to see. The specific distance can be set based on different lens parameters, thereby improving the applicability and scope of use of this embodiment.
[0039] As an optional implementation, Figure 1 As shown, the imaging module 2 also includes a base 27, which is used to install and fix the light source spectrometer prism 25 and the camera 26. The specific fixing method can be a snap connection, a screw connection, etc., so that the light source spectrometer prism 25 and the camera 26 are not prone to shaking during operation, ensuring the stability of the imaging working process of the photoelectric element in this embodiment.
[0040] The embodiment is only a special example and does not indicate that the present invention is implemented in such a way.
[0041] The above description is merely a preferred embodiment of the present invention. Those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.
Claims
1. An auto-focusable component imaging system, characterized in that: Used to image at least one photoelectric element, including an autofocus module and an imaging module; The autofocus module drives the first lens to move, causing the first lens to automatically focus in a first direction of the photoelectric element; the imaging module uses the first lens and the second lens arranged opposite to each other to respectively form images in the first direction and the second direction of the photoelectric element; the first lens is arranged directly above the vertical direction, and the second lens is arranged directly below the vertical direction and on the same vertical line; the first lens and the second lens form images simultaneously; The first lens obtains a first imaging beam, and the second lens obtains a second imaging beam. The first imaging beam and the second imaging beam are both located in the horizontal direction and parallel to each other, and the first imaging beam is located above the second imaging beam. The beam of the first lens and the beam of the second lens are independent of each other and do not cross each other, are equal in the width direction, and are half the height of the camera sensor in the height direction.
2. The component imaging system capable of automatic focus according to claim 1, characterized in that: The autofocus module includes a screw assembly and a connecting assembly; the connecting assembly is connected to the first lens, and the screw assembly drives the connecting assembly to move, so that the first lens performs linear reciprocating motion.
3. The component imaging system capable of automatic focus according to claim 2, characterized in that: The connecting assembly includes a screw nut connecting piece, a first guide rail slider, a ramp block, a stop block and a first lens mounting piece; the screw nut connecting piece is connected to the screw nut and to the first guide rail slider; the first guide rail slider is connected to the ramp block, the ramp surface of the ramp block is connected to the stop block, and the stop block is fixedly connected to the first lens mounting piece; the first lens mounting piece is used to fixedly mount the first lens.
4. The component imaging system capable of automatic focus according to claim 3, characterized in that: The connecting assembly also includes a mounting base, a motor mounting seat, and a second guide rail slider; the mounting base is used to fix the first guide rail slider, the second guide rail slider, and the motor mounting seat, the motor mounting seat is used to install a stepper motor, and the second guide rail slider is connected to the side of the first lens mounting member.
5. The component imaging system capable of automatic focus according to claim 4, characterized in that: The first lens mounting component is connected to a grating ruler or a displacement sensor; the grating ruler is used to measure the displacement of the first lens mounting component and is provided with a reading head; the displacement sensor is a laser displacement sensor, a mechanical displacement sensor, a linear laser displacement sensor or a laser interferometer.
6. The component imaging system capable of automatic focus according to claim 2, characterized in that: The lead screw assembly includes a stepping motor, a lead screw and a lead screw nut; the stepping motor drives the lead screw to rotate, and the rotation of the lead screw drives the lead screw nut to perform linear reciprocating motion.
7. The component imaging system capable of automatic focus according to any one of claims 1 to 6, characterized in that: The imaging module includes a first lens, a second lens, a point light source, a right-angled prism, a light source beam splitter and a camera; the first lens and the second lens are separated from each other and arranged facing each other; the right-angled prism is used to generate two 45-degree reflection surfaces, and the light from the point light source is reflected by the right-angled prism into the camera; the light source beam splitter splits the light source and partially enters the first imaging beam of the first lens and is reflected by the right-angled prism to the corresponding focusing surface of the first lens, and then reflected back to the right-angled prism, the first lens imaging beam, and then enters the sensor surface of the camera.
8. The component imaging system capable of automatic focus according to claim 7, characterized in that: The ratio of the camera sensor in the height direction to the width direction is 2:1, so that the light beam of the first lens and the light beam of the second lens occupy the upper half and the lower half of the camera sensor respectively.
9. The component imaging system capable of automatic focus according to claim 7, characterized in that: A focusing lens is provided between the light source beam splitter prism and the camera, and the focusing lens forms an infinite image obtained by the first lens onto the sensor surface of the camera.
10. The component imaging system capable of automatic focus according to claim 7, characterized in that: The imaging module further includes a base, which is used to install and fix the light source beam splitter prism and the camera.