Active light-adjusting coring method and coring processing device

Abstract

The invention discloses an active light-adjusting core taking method and a core taking processing device.The active light-adjusting core taking method comprises the following steps that initial alignment is conducted, specifically, a driving assembly drives a lens to be arranged between a laser transmitter and a laser receiver; optical positioning: after initial alignment, operating the laser transmitter, and driving the optical axis of the lens to coincide with the laser beam of the laser transmitter by the driving assembly according to the receiving information of the laser receiver; and core taking processing: after optical positioning, grinding the side surface of the lens by a grinding assembly. A high-precision coring process taking optical parameters as a direct target is constructed, the dependence on an appearance reference is reduced, meanwhile, the process is coherent, repeated clamping and manual intervention are reduced, the consistency of production efficiency and product performance is improved, and the strict requirement of high-end optical products for micron-grade or even higher coaxiality can be met.

Description

Technical Field

[0001] This invention relates to the field of precision machining technology for optical components, and in particular to an active optical core-taking method and a core-taking processing apparatus for performing the active optical core-taking method. Background Technology

[0002] In optical instruments, imaging equipment, lidar, and various precision optoelectronic systems, the performance of multi-lens combinations is highly dependent on the concentricity of the optical axes of each lens with the mechanical assembly axis. This critical process is commonly referred to in the industry as "core taking." Its purpose is to precisely grind the outer periphery of the lens to make the optical axis of the lens coincide with the rotation axis around which subsequent processing or assembly takes place, and to ensure that the outer diameter, chamfer, and surface quality meet the design requirements. This provides a high-precision coaxial reference for the assembly of the optical system, ensuring that the beam transmission or imaging quality meets the design expectations.

[0003] Traditional core removal generally employs a mechanical core-setting and edge-grinding process, which uses a pair of core-setting chucks with extremely high coaxiality and smooth end faces to clamp the lens with the help of spring force. Due to the uneven thickness of the lens edge, core-setting forces and frictional resistance are generated in the clamping process, pointing towards the thin side and the thick side. When the two are balanced, the optical axis of the lens coincides with the axis of the chuck, and the core-setting is completed before the edge-grinding process is performed.

[0004] However, this type of mechanical centering method essentially uses the physical shape of the semi-finished lens formed in the previous process as the alignment reference. The shape of the lens does not necessarily have a geometric relationship or stable correspondence with the optical axis. Once the shape center and the optical axis are offset in the previous turning, milling or other forming processes, mechanical centering cannot be corrected in the subsequent core-taking stage. This results in the residual error of the optical center not being consistent with the structural center after processing, which directly affects the coaxiality and final optical performance of the multi-lens system.

[0005] In addition, the effect of mechanical centering is affected by a combination of factors such as the coaxiality of the chuck, the consistency of spring force, the change of friction coefficient and the uniformity of workpiece material. Even a slight deviation can cause the optical axis to tilt or become eccentric, requiring repeated manual inspection and adjustment, which increases the complexity and uncertainty of the process, resulting in low yield, high processing difficulty and difficulty in meeting the stringent requirements of high-end optical products for micron-level or even submicron-level coaxiality.

[0006] With the continuous advancement of miniaturization, lightweighting and high performance of optical systems in fields such as consumer electronics, automotive optics and optical communication, the requirements for core-taking accuracy and efficiency are constantly increasing. The traditional mechanical core-taking method that relies on physical shape reference is no longer suitable. The industry urgently needs a new generation of core-taking method with real-time detection and closed-loop correction capabilities to break through the bottleneck of previous error accumulation and achieve high-precision and high-stability lens optical axis positioning and processing. Summary of the Invention

[0007] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an active optical core-taking method, which uses laser detection and six-degree-of-freedom drive to correct the optical axis in real time, replacing the mechanical core-taking based on the traditional shape reference, eliminating preceding errors, and achieving high-precision alignment between the optical axis and the grinding axis; furthermore, it has strong compatibility with elastic clamping and multi-mode processing bases, and the closed-loop process ensures accuracy and efficiency, improves core-taking yield, provides a highly consistent coaxial reference for optical systems, and significantly optimizes performance and manufacturing level.

[0008] The present invention also proposes a core extraction processing apparatus for performing the above-described active light-tuning core extraction method.

[0009] The active optical core-taking method according to the present invention includes the following steps: Initial alignment: The drive assembly positions the lens between the laser emitter and the laser receiver; Optical alignment: After initial alignment, the laser emitter is operated and, based on the received information from the laser receiver, the driving component drives the optical axis of the lens to coincide with the laser beam of the laser emitter when the lens is not placed. Core processing: After optical alignment, the grinding assembly grinds the side surface of the lens.

[0010] The active optical core-taking method of the present invention has at least the following beneficial effects: Through three ordered steps—initial alignment, optical alignment, and core-taking processing—a high-precision core-taking process with optical parameters as the direct target is constructed. Specifically: In the initial alignment stage, the drive assembly places the lens between the laser emitter and the laser receiver, establishing a stable opposing optical path environment for subsequent optical detection. Simultaneously, the lens's shape serves as a coarse reference, quickly guiding its center to the approximate path of the laser beam, shortening the system's search and pre-positioning time, and laying the foundation for fine alignment. In the optical alignment stage, the laser emitter is activated to emit a laser beam. After refraction by the lens, the laser beam is captured by the opposing laser receiver. The receiver provides real-time feedback on the position, size, roundness, and energy of the laser spot on the target surface. The combined changes in these information can sensitively and accurately reflect the deviation between the lens's optical axis and the theoretical laser beam path when the lens is not placed. Based on this feedback, the drive assembly continuously adjusts the spatial position and orientation of the lens in six degrees of freedom, gradually aligning the lens's optical axis with the theoretical laser beam path. The laser beam alignment process overcomes the limitations of traditional mechanical core-setting, which relies on the physical center of the lens. It directly uses the optical axis as the core reference for calibration, thereby eliminating any inconsistencies between the lens shape and the optical axis that may remain from previous processing. This ensures that the optical axis is strictly collinear with the rotation axis used in subsequent grinding. After optical alignment, the core-taking stage begins. At this point, the lens has been optically calibrated to have an optical axis consistent with the laser beam. The grinding assembly grinds the side of the lens along this axis, naturally forming a precise outer diameter concentric with the optical axis. This satisfies both dimensional and shape accuracy requirements and provides a reliable coaxial reference for the high-precision assembly of the subsequent optical system. Overall, optical inspection, dynamic multi-degree-of-freedom adjustment, and machining are organically linked into a closed-loop control process. This process combines the speed of coarse positioning, the accuracy of fine positioning, and the stability of machining, significantly improving core-taking accuracy and product yield. It also reduces reliance on external references. Furthermore, the continuous process reduces repeated clamping and manual intervention, improving production efficiency and product performance consistency. This meets the stringent requirements of high-end optical products for micron-level or even higher coaxiality.

[0011] According to some embodiments of the present invention, in the active optical alignment method, the received information includes the position and / or size and / or roundness and / or energy of the laser beam to determine the degree of deviation between the optical axis and the laser beam.

[0012] According to some embodiments of the present invention, the active optical alignment method calibrates the positions of the laser emitter and the laser receiver and marks the position and / or shape and / or intensity of the light spot before initial alignment; during optical alignment, the driving component drives the lens to move so that the received information is consistent with the calibration of the light spot.

[0013] According to some embodiments of the present invention, the active optical alignment method enables the driving component to drive the lens to move in six degrees of freedom during initial alignment and optical alignment.

[0014] According to some embodiments of the present invention, in the active optical core-finding method, during initial alignment, the driving component drives the center of the lens to move to the center of the laser beam, based on the shape of the lens.

[0015] The active optical core-taking method according to some embodiments of the present invention further includes the following steps: Pressing and fixing: After optical alignment and before core taking, the pressing assembly presses and fixes the lens.

[0016] According to some embodiments of the present invention, the active optical adjustment core-taking method includes a first pressure tool and a second pressure tool, the first pressure tool and the second pressure tool being respectively arranged on both sides of the lens; during the pressing and fixing process, the first pressure tool and the second pressure tool can move in opposite directions to press the lens.

[0017] According to some embodiments of the present invention, the active optical adjustment core removal method, after being pressed and fixed, the driving component disengages from the lens; The grinding assembly includes a grinding wheel. During core taking, the clamping assembly rotates together with the lens. The grinding wheel moves toward the center of the lens and can rotate relative to the lens to grind the side of the lens.

[0018] The core extraction processing apparatus for performing the active optical core extraction method according to the present invention comprises: A drive component that can connect to and drive the movement of the lens; The detection component includes a laser emitter and a laser receiver disposed on both sides of the lens, the laser emitter and the laser receiver being arranged opposite to each other, and the driving component being communicatively connected to the detection component and driving the optical axis of the lens to coincide with the laser beam of the laser emitter when the lens is not placed. A grinding assembly for core extraction of the lens.

[0019] The core extraction apparatus according to the present invention has at least the following beneficial effects: by configuring the driving component, the detection component, and the grinding component and connecting them in communication, a complete detection-adjustment-processing closed-loop system is formed. The driving component can adjust the position and orientation of the lens, the laser emitter and receiver of the detection component are arranged opposite each other to directly obtain the optical axis deviation information, and the grinding component performs core extraction based on the calibrated optical axis. This integrated design integrates all the key hardware conditions required by the method into the same device, reduces dependence on external equipment and station conversion errors, improves system stability and on-site deployment efficiency, and provides reliable hardware support for the industrial application of the method.

[0020] According to the core extraction apparatus of the present invention, the laser receiver is capable of receiving the position and / or size and / or roundness and / or energy of the laser beam to determine the deviation of the optical center from the path of the laser beam, and / or to determine the deviation of the optical axis from the path of the laser beam; The core extraction device further includes a first pressure fixture and a second pressure fixture, which are respectively arranged on both sides of the lens. The first pressure fixture and the second pressure fixture can move in opposite directions to press the lens or move in opposite directions to release the lens. Both the first pressure fixture and the second pressure fixture have an elastic structure on the side facing the center of the lens to elastically press against the lens. Both the first pressure fixture and the second pressure fixture are hollow structures. The first pressure fixture is arranged on the same side as the laser emitter and can accommodate the laser emitter inside. The second pressure fixture is arranged on the same side as the laser receiver and can accommodate the laser receiver inside. The core extraction processing device further includes a processing base, on which the first pressure tool and the second pressure tool are both mounted. The processing base can drive the first pressure tool, the second pressure tool, and the lens to rotate together. The grinding assembly includes a grinding wheel, which can move toward the center of the lens and can rotate relative to the lens. The drive assembly is connected to the end of the lens and is adapted to drive the lens to move in six degrees of freedom.

[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram illustrating the effect of the driving assembly of the lens core removal and adjustment structure on the lens according to an embodiment of the present invention; Figure 2 This is a schematic diagram illustrating the combined action of the driving component and the detection component of the lens core removal and adjustment structure in an embodiment of the present invention on the lens. Figure 3 This is a schematic diagram illustrating the application of a lens core extraction processing apparatus having the lens core extraction adjustment structure according to an embodiment of the present invention. Figure 4 This is a flowchart of the active optical adjustment core-taking method applied to the lens core-taking processing apparatus in an embodiment of the present invention.

[0023] Explanation of icon numbers: Driver component 100; Laser emitter 210; laser beam 211; laser receiver 220; Lens 300; Optical axis 301; Elastic structure 401; First presser 410; Second presser 420; Machining base 500; Grinding wheel 600. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0026] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0028] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] Therefore, such as Figures 1 to 3As shown, the lens core adjustment structure proposed in this invention includes a driving component 100 and a detection component. The driving component 100 can connect to and drive the lens 300 to move. The detection component includes a laser emitter 210 and a laser receiver 220 disposed on both sides of the lens 300. Specifically, the laser emitter 210 and the laser receiver 220 are arranged facing each other. The driving component 100 can drive the optical center of the lens 300 to be on the path of the laser beam 211 of the laser emitter 210 and can receive it on the laser receiver 220 to determine the position of the optical center and / or the optical axis 301. This approach fundamentally overcomes the limitations of traditional mechanical centering technology, which relies on physical shape benchmarks. It achieves position calibration of the lens 300 with optical parameters as the direct target. Specifically, the detection component constructs an optical detection benchmark based on the laws of light refraction by arranging laser emitters 210 and laser receivers 220 opposite each other on both sides of the lens 300. Therefore, when the optical center of the lens 300 coincides with the path of the laser beam 211, the light, after refraction by the lens 300, forms a centrally located, highly circular, and energy-stable spot on the receiver; while when the optical center coincides with the path of the unplaced laser beam 220, the light remains centered. When the theoretical laser path of lens 300 is offset or the optical axis 301 is deflected, the light refraction path changes. The receiver will detect that the light spot is off-center, the roundness decreases, the energy is attenuated, or even that the signal cannot be received. This multi-dimensional detection of the position, size, roundness, and energy of the light spot can directly and sensitively reflect the deviation between the optical center of lens 300 and the laser path, as well as the deviation between the optical axis 301 and the laser path, providing a reliable quantitative basis for the accurate determination of the position of lens 300. Based on this, the drive component 100 can connect to and drive lens 300 to move. On the one hand, the drive assembly 100 can guide the optical center of the lens 300 onto the path of the laser beam 211 of the laser emitter 210, ensuring that the laser beam 211 penetrates the lens 300 and is effectively received by the receiver, thereby establishing a closed loop for optical detection. On the other hand, the drive assembly 100 can adjust the position and orientation of the lens 300 according to the detection signal fed back by the receiver, ultimately making the optical center of the lens 300 precisely coincide with the path of the laser beam 211, thereby achieving high-precision alignment between the optical axis 301 and the laser beam 211, thus bypassing the reliance on physical shape in traditional processes. The center achieves mechanical core positioning, directly using the optical axis 301, the core element of the optical system, as the adjustment target. Through active optical adjustment, the optical axis 301 can be forced to coincide with the rotation axis of the subsequent grinding process, eliminating the cumulative impact of the previous process processing error on the core taking result from the source. This not only greatly improves the core taking accuracy, but also significantly reduces the core taking difficulty and improves the processing yield due to the real-time and accurate detection and adjustment. It provides a highly consistent reference surface for the subsequent assembly of the optical system, ultimately ensuring the reliability of the optical system performance and the consistency with the design values.

[0030] It is easy to understand that when the laser beam 211 passes through the optical center, the path of the laser beam 211 exiting the lens 300 will not change. However, when it deviates from the optical center and enters the lens 300, the path of the laser beam 211 exiting the lens 300 will be deviated or tilted.

[0031] In some laser detection applications, by setting multi-dimensional optical characteristics such as the position, size, roundness, and energy of the detectable laser beam 211 in the laser receiver 220, the deviations between the optical center of the lens 300 and the path of the laser beam 211, as well as the deviations between the optical axis 301 and the path of the laser beam 211, can be more precisely and comprehensively quantitatively identified. For example, when the optical center deviates from the path of the laser beam 211 or when there is an angle between the optical axis 301 and the path of the laser beam 211, the change in the refracted light path will directly manifest as a shift in the position of the light spot on the receiver, a change in diameter, a decrease in the roundness of the outline, and a decrease or fluctuation in energy intensity. These parameters corroborate each other, eliminating the misjudgment that may be caused by a single detection index, thereby significantly improving the detection resolution and the reliability of the judgment. In addition, this multi-dimensional detection mechanism provides a clear quantitative basis for the subsequent adjustment of the drive component 100, enabling precise compensation for complex deviations, effectively improving the accuracy and repeatability of the optical axis 301 positioning, and laying a solid data foundation for high-precision core picking. Furthermore, the drive component 100 can drive the optical axis 301 to coincide with the laser beam 211 of the laser emitter 210 when the lens 300 is not placed, locking the adjustment target on the core axis of the optical system, namely the optical axis 301. This breaks through the limitation of traditional mechanical core-setting relying on the structural center of the lens 300, thus eliminating the inherent deviation caused by the inconsistency between the shape and the optical axis 301 in the preceding processing. In this regard, by aligning the optical axis 301 with the path of the laser beam 211 when the lens 300 is not placed with high precision, it can be ensured that the rotation axis around which the subsequent grinding or core-taking processing revolves is completely consistent with the optical center of the lens 300. This makes the outer diameter processing surface of the lens 300 naturally become a reference surface concentric with the optical axis 301. This not only greatly reduces the difficulty of coaxiality adjustment during optical system assembly, but also improves the consistency and reliability of the imaging or beam transmission performance of the multi-lens 300 system, fundamentally improving the accuracy and yield of core-taking. Optionally, the drive assembly 100 is connected to the end of the lens 300, allowing the end of the lens 300 to be directly used as a force application or positioning point, reducing additional errors introduced by intermediate transmission links and improving the intuitiveness and response speed of position control. For example, the drive assembly 100 is suitable for driving the lens 300 to move in six degrees of freedom, meaning that the position (X, Y, Z translation) and attitude (rotation around the three axes) of the lens 300 in space can be independently and continuously adjusted. This enables it to handle complex working conditions with simultaneous eccentricity, tilt, or other combined deviations, ensuring that the optical center is accurately guided to the path of the laser beam 211 in three-dimensional space and that the optical axis 301 coincides with the laser beam 211. This significantly enhances the universality and adjustment accuracy of the device for lenses 300 of different specifications, shapes, and initial deviations. It is easy to understand that the six-degree-of-freedom structure of the drive assembly 100 can refer to the existing common six-axis robot structure, which will not be described in detail here.

[0032] Refer to Figure 2 and Figure 3In some embodiments of the present invention, the lens core-taking adjustment structure includes a clamping assembly to clamp the lens 300 after the position of the optical center and / or optical axis 301 has been determined. Furthermore, after the positions of the optical axis 301 and the optical center are detected and determined, the clamping assembly is introduced to fix the lens 300. This maintains the optimal position obtained from dynamic calibration throughout the entire processing, avoiding displacement caused by external forces, vibration, or thermal deformation during grinding or core-taking, thereby solidifying the results of high-precision calibration. This phased design decouples detection and adjustment from processing and fixing, allowing the calibration process to be fully optimized under unconstrained conditions. During the processing stage, a fixed posture is maintained through rigid or controllable flexible clamping, effectively preventing calibration failure, improving the consistency and reliability of mass production, and reducing the scrap rate caused by positional drift. Specifically, the clamping assembly includes a first clamp 410 and a second clamp 420, which are respectively arranged on both sides of the lens 300. The first clamp 410 and the second clamp 420 can move in opposite directions to clamp the lens 300 or move in opposite directions to release the lens 300. Optionally, the clamping and releasing actions can be achieved through a single drive source to apply force symmetrically and switch quickly, resulting in high operational efficiency and a compact structure. Furthermore, the opposite force application method can evenly distribute the clamping force, avoiding deformation of the lens 300 or displacement of the optical axis 301 caused by unilateral force, ensuring that the calibrated positional accuracy is not changed during the fixing process. At the same time, the synchronous movement of the two clamps facilitates integration with the automated control system, shortens the clamping time, increases the production line cycle time, and reduces random errors introduced by human operation, thereby enhancing the overall processing stability and repeatability. Furthermore, both the first clamping fixture 410 and the second clamping fixture 420 are provided with elastic structures 401 on the side facing the center of the lens 300. These elastic structures press against the lens 300, transforming the pressing process from rigid impact to flexible fit. This automatically adapts to the microscopic undulations, local curvature differences, or non-ideal flatness of the lens 300 surface, ensuring stable fixation while avoiding surface scratches or stress concentration damage caused by hard contact. In addition, the elastic buffering effect can absorb minor vibrations and impacts during clamping, maintaining a uniform distribution of clamping force and preventing displacement or breakage of the lens 300 due to excessive local pressure. This is particularly crucial for fragile optical components, significantly improving the quality of the finished product and the long-term retention of the calibration position.

[0033] Refer to Figures 1 to 3In some embodiments of the present invention, both the first pressure fixture 410 and the second pressure fixture 420 are hollow structures. The first pressure fixture 410 and the laser emitter 210 are arranged on the same side and can accommodate the laser emitter 210 inside. The second pressure fixture 420 and the laser receiver 220 are arranged on the same side and can accommodate the laser receiver 220 inside. On the one hand, this allows the laser beam 211 to pass unobstructed through the center of the lens 300 and be captured by the receiver during the detection and adjustment stages. On the other hand, the pressure fixtures can be detected in real time during the clamping stage. This not only simplifies the spatial layout and motion chain length of the device and reduces calibration errors and time losses caused by tooling changes or position readjustments, but also improves the continuity and overall efficiency of the detection-adjustment-processing flow, and reduces system complexity and maintenance costs. In some embodiments, the first pressure post 410 includes two first pressure posts arranged separately, and the second pressure post 420 includes two second pressure posts arranged separately. The two first pressure posts can press against the two ends of the same side of the lens 300 respectively, and the two second pressure posts can press against the two ends of the other side of the lens 300 respectively.

[0034] Refer to Figures 1 to 3 In some embodiments of the present invention, the lens core-taking adjustment structure includes a processing base 500, a clamping assembly mounted on the processing base 500, and the processing base 500 capable of driving the clamping assembly and the lens 300 to rotate together for core-taking processing of the lens 300. It is understood that by controlling the position and orientation of the lens 300 during clamping by the drive assembly 100 and the grinding process by the grinding assembly during grinding, the entire process from fine-tuning the clamping position to multi-directional core-taking can be completed in a single clamping operation. This multi-mode motion design avoids the cumulative errors caused by multiple clamping and repositioning, improving processing accuracy and consistency. For example, the drive assembly 100, with six degrees of freedom, controls the position and orientation of the lens 300 according to the processing requirements of lenses 300 with different curvatures and shapes, and then clamps the lens 300 by the clamping assembly, thereby expanding the applicability of the device and improving the processing capability of complex workpieces. In some specific applications, the drive assembly 100 is independently disposed on the outside of the processing base 500, and its movement is independent of that of the processing base 500.

[0035] The lens core-taking processing apparatus according to an embodiment of the present invention includes a lens core-taking adjustment structure according to an embodiment of the present invention, and further includes a grinding assembly for performing core-taking processing on the lens 300. A common grinding assembly includes a grinding wheel 600. Specifically, the grinding wheel 600 is disposed on the side of the lens 300 opposite to the drive assembly 100. During grinding, the grinding wheel 600 can move towards the center of the lens 300 and grind the side surface of the lens 300 by rotating relative to the lens 300. The drive member of the grinding assembly and its connection structure with the grinding wheel 600 can refer to the connection structure of existing grinding apparatuses, and will not be described in detail here.

[0036] According to an embodiment of the present invention, the lens core-taking processing apparatus, by employing the lens core-taking adjustment structure of the present invention, integrates the optical axis 301 calibration and grinding processing into a closed-loop integrated system. The adjusted lens 300 position can directly enter the grinding process without secondary clamping or re-alignment, significantly shortening the process cycle and eliminating repetitive positioning errors. During grinding, the grinding wheel 600 can move towards the center of the lens 300 to perform radial feed grinding, working in conjunction with the processing base to achieve continuous and uniform peripheral removal, ensuring that parameters such as the outer diameter, roundness, and chamfer after core-taking are consistently within specifications. The overall apparatus, relying on the aforementioned high-precision optical adjustment and flexible clamping, ensures that the optical center and the structural outline center are highly aligned, providing a reliable and repeatable reference for the subsequent high-performance assembly of the optical system, comprehensively improving product quality and production efficiency.

[0037] Other configurations and operations of the lens core extraction apparatus according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0038] Refer to Figure 4 According to an embodiment of the present invention, an active optical core extraction method is used to perform a lens core extraction processing apparatus according to an embodiment of the present invention, wherein the active optical core extraction method includes the following steps: S100, Initial alignment: The drive assembly 100 drives the lens 300 to be positioned between the laser emitter 210 and the laser receiver 220; S200, Optical Alignment: After the initial alignment S100, the laser emitter 210 is run and the drive assembly 100 drives the optical axis 301 of the lens 300 to coincide with the laser beam 211 of the laser emitter 210 when the lens 300 is not placed, according to the received information of the laser receiver 220. S400 Core Processing: After optical alignment S200, the grinding assembly grinds the side surface of the lens 300.

[0039] According to the active optical alignment core-taking method of this invention, a high-precision core-taking process with optical parameters as the direct target is constructed through three ordered steps: initial alignment, optical alignment, and core-taking processing. Specifically: In the initial alignment stage, the driving component 100 places the lens 300 between the laser emitter 210 and the laser receiver 220, establishing a stable opposing optical path environment for subsequent optical detection. Simultaneously, the shape of the lens 300 can be used as a coarse reference to quickly guide its center to the approximate path of the laser beam 211, shortening the system search and pre-positioning time and laying the foundation for fine alignment; entering the optical alignment stage... After the positioning phase, the laser emitter 210 is activated to emit a laser beam 211. The laser beam 211 is refracted by the lens 300 and captured by the opposing laser receiver 220. The receiver provides real-time feedback on optical information such as the position, size, roundness, and energy of the laser spot on the target surface. The combined changes in this information can sensitively and accurately reflect the deviation between the optical axis 301 of the lens 300 and the theoretical path of the laser beam 211 when the lens 300 is not placed. Based on this feedback, the drive assembly 100 continuously adjusts the spatial position and orientation of the lens 300 in six degrees of freedom, ensuring that the optical axis 301 of the lens 300 is aligned with the target surface. 1. Gradually aligning with the theoretical laser beam 211, this process overcomes the limitations of traditional mechanical centering which relies on the physical center of the shape. It directly uses the optical axis 301 as the core reference for correction, thus eliminating any inconsistencies between the shape and the optical axis 301 that may have remained from previous processing. This ensures that the optical axis 301 is strictly collinear with the rotation axis used in subsequent grinding. After optical alignment, the core-taking stage begins. At this point, the lens 300 has been optically calibrated to obtain an optical axis 301 consistent with the theoretical laser beam 211. The grinding assembly grinds the side of the lens 300 along this axis, naturally forming a grinding surface aligned with the optical axis 301. The concentric precision outer diameter not only meets the requirements for dimensional and shape accuracy but also provides a reliable coaxial reference for the high-precision assembly of subsequent optical systems. The overall process organically links optical inspection, dynamic multi-degree-of-freedom adjustment, and machining into a closed-loop control flow, combining the speed of coarse positioning, the accuracy of fine positioning, and the stability of machining. This significantly improves core picking accuracy and finished product yield, reduces reliance on external references, and, with a streamlined process, reduces repetitive clamping and manual intervention, improving production efficiency and product performance consistency. It can meet the stringent requirements of high-end optical products for micron-level or even higher coaxiality. Specifically, in optical alignment, the received information includes the position and / or size and / or roundness and / or energy of the laser beam 211 to determine the degree of deviation between the optical axis 301 and the laser beam 211. This allows the determination of the deviation between the optical axis 301 and the laser beam 211 to be based on the joint analysis of multi-dimensional optical characteristics, rather than a judgment that is easily affected by a single parameter. For example, positional offset directly reflects the eccentricity between the optical axis 301 and the laser path; changes in size reveal the degree of focusing or divergence caused by differences in refraction angles; a decrease in roundness reflects the astigmatic effect caused by the tilt of the optical axis 301; and energy attenuation indicates optical path offset or scattering loss. These parameters corroborate each other, which can significantly improve detection sensitivity and judgment reliability, making the fine-tuning of the drive component 100 more targeted and efficient, thereby accelerating the alignment speed of the optical axis 301 and the laser beam 211 and improving positioning accuracy, providing a more stable optical reference for subsequent core extraction processing.

[0040] Specifically, before initial alignment, the positions of the laser emitter 210 and receiver are calibrated, and the position, shape, and intensity of the light spot without the lens 300 are marked, establishing a reliable reference. This transforms the adjustment target of the drive component 100 during optical alignment from the relatively vague "light spot falling on the receiver" to a precise state consistent with the calibration, effectively eliminating systematic errors caused by equipment installation or drift. By driving the received information to be consistent with the calibrated light spot during alignment, closed-loop quantitative control of the overlap between the optical axis 301 and the laser beam 211 can be achieved. This not only improves the repeatability and stability of each processing step but also reduces the dependence on operator experience, ensuring high precision and consistency across different batches or different equipment. Furthermore, during initial alignment and optical alignment, the drive component 100 can drive the lens 300 to move in six degrees of freedom, allowing the position and orientation of the lens 300 in space to be adjusted independently and continuously. This can handle complex deviations such as simultaneous eccentricity, tilting, or combined deformation. Furthermore, the full degree of freedom adjustment can precisely guide the optical center to the laser beam 211 path in three-dimensional space and make the optical axis 301 coincide with it, avoiding the inability to eliminate deviations in certain directions due to the limitation of degrees of freedom, thereby significantly improving the adaptability of the method and the final core extraction accuracy, especially suitable for processing lenses 300 with irregular shapes or large initial posture deviations.

[0041] In some applications, during initial alignment, the drive assembly 100 uses the shape of the lens 300 as a reference to move the center of the lens 300 to the center of the laser beam 211. This utilizes the known structural shape center as a rapid coarse positioning reference, shortening the search range and pre-alignment time of the laser detection system and improving the overall process efficiency. It should be noted that although the shape center is not the optical axis 301, this coarse positioning places the lens 300 within the effective working area of ​​the laser optical path, providing a good starting point for subsequent optical adjustment, reducing unnecessary drive strokes and adjustment time, and to some extent reducing the risk of detection failure due to the initial position being far from the optical path. This allows the method to combine speed and stability in mass production.

[0042] Refer to Figure 4 In some embodiments of the present invention, the active optical core-taking method further includes the following steps: S300, Clamping and Fixing: After optical alignment S200 and before core taking S400, the clamping assembly clamps and fixes the lens 300. By adding a clamping and fixing step after optical alignment and before core taking, the ideal position of the optical axis 301 and the laser beam 211, obtained through optical calibration, can be kept stable throughout the entire processing. This prevents displacement or attitude changes of the lens 300 caused by cutting force, vibration, or thermal expansion during grinding, thereby avoiding damage to the high-precision calibration results. To this end, the inspection and adjustment and processing are separated into two stages, allowing the calibration process to be fully optimized under unconstrained conditions. The processing stage ensures positional rigidity through clamping, significantly improving the repeatability and yield of mass production, and reducing the risk of dimensional deviations or scrap due to positional drift. The clamping assembly includes a first clamp 410 and a second clamp 420, which are respectively arranged on both sides of the lens 300. It should be noted that the specific structures of the first clamping fixture 410 and the second clamping fixture 420 are described above and will not be repeated in detail here. During clamping and fixing, the first clamping fixture 410 and the second clamping fixture 420 can move in opposite directions to clamp the lens 300. By applying force synchronously from both sides, a uniform distribution of clamping force is maintained, ensuring that the calibrated position and orientation do not change during the fixing process, thereby maintaining the accuracy of optical alignment and protecting the surface of the lens 300 from localized stress damage. Furthermore, after clamping and fixing, the drive assembly 100 disengages from the lens 300, avoiding vibration or additional stress introduced by continuous coupling between the drive system and the lens 300 during processing, ensuring that the clamping assembly and the lens 300 form an independent and stable rigid unit during the core-taking stage. Further, during core-taking, the clamping assembly and the lens 300 rotate together, cooperating with the grinding wheel 600 to move towards the center of the lens 300 to grind the outer surface of the lens 300 end, ensuring that the ground surface becomes a high-precision concentric reference, achieving efficient and stable core-taking, and improving processing accuracy and surface quality.

[0043] Other configurations and operations of the active optical core-taking method according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0044] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An active optical core acquisition method, characterized in that, Includes the following steps: Initial alignment: The drive assembly positions the lens between the laser emitter and the laser receiver; Optical alignment: After initial alignment, the laser emitter is operated and, based on the received information from the laser receiver, the driving component drives the optical axis of the lens to coincide with the laser beam of the laser emitter when the lens is not placed. Core processing: After optical alignment, the grinding assembly grinds the side surface of the lens.

2. The active optical core-taking method according to claim 1, characterized in that: In optical alignment, the received information includes the position and / or size and / or roundness and / or energy of the laser beam to determine the degree of deviation between the optical axis and the laser beam.

3. The active optical core-taking method according to claim 2, characterized in that: Before initial alignment, the positions of the laser emitter and the laser receiver are calibrated and the position and / or shape and / or intensity of the light spot are marked; during optical alignment, the drive assembly drives the lens to move so that the received information is consistent with the marking of the light spot.

4. The active optical core-taking method according to claim 1, characterized in that: During initial alignment and optical adjustment, the drive assembly is capable of driving the lens to move in six degrees of freedom.

5. The active optical core-taking method according to any one of claims 1 to 4, characterized in that: During initial alignment, the driving component uses the shape of the lens as a reference to drive the center of the lens to move to the center of the laser beam.

6. The active optical core-taking method according to claim 1, characterized in that: It also includes the following steps: Pressing and fixing: After optical alignment and before core taking, the pressing assembly presses and fixes the lens.

7. The active optical core-taking method according to claim 6, characterized in that: The clamping assembly includes a first clamp and a second clamp, which are respectively arranged on both sides of the lens; during clamping and fixing, the first clamp and the second clamp can move in opposite directions to clamp the lens.

8. The active optical core-taking method according to claim 6, characterized in that: After being clamped and fixed, the drive assembly disengages from the lens; The grinding assembly includes a grinding wheel. During core taking, the clamping assembly rotates together with the lens. The grinding wheel moves toward the center of the lens and can rotate relative to the lens to grind the side of the lens.

9. A core extraction processing apparatus for performing the active optical core extraction method as described in any one of claims 1 to 8, characterized in that, include: A drive component that can connect to and drive the movement of the lens; The detection component includes a laser emitter and a laser receiver disposed on both sides of the lens, the laser emitter and the laser receiver being arranged opposite to each other, and the driving component being communicatively connected to the detection component and driving the optical axis of the lens to coincide with the laser beam of the laser emitter when the lens is not placed. A grinding assembly for core extraction of the lens.

10. The core extraction apparatus according to claim 9, characterized in that: The laser receiver is capable of receiving the position and / or size and / or roundness and / or energy of the laser beam to determine the deviation of the optical center from the path of the laser beam, and / or to determine the deviation of the optical axis from the path of the laser beam; The core extraction device further includes a first pressure fixture and a second pressure fixture, which are respectively arranged on both sides of the lens. The first pressure fixture and the second pressure fixture can move in opposite directions to press the lens or move in opposite directions to release the lens. Both the first pressure fixture and the second pressure fixture have an elastic structure on the side facing the center of the lens to elastically press against the lens. Both the first pressure fixture and the second pressure fixture are hollow structures. The first pressure fixture is arranged on the same side as the laser emitter and can accommodate the laser emitter inside. The second pressure fixture is arranged on the same side as the laser receiver and can accommodate the laser receiver inside. The core extraction processing device further includes a processing base, on which the first pressure tool and the second pressure tool are both mounted. The processing base can drive the first pressure tool, the second pressure tool, and the lens to rotate together. The grinding assembly includes a grinding wheel, which can move toward the center of the lens and can rotate relative to the lens. The drive assembly is connected to the end of the lens and is adapted to drive the lens to move in six degrees of freedom.

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