Optical system

Abstract

The application relates to the field of precision optics and provides an optical system. The optical system comprises a lens group, the lens group comprising a plurality of lenses arranged in sequence along an optical path direction; a magnetic member fixedly connected with a first lens in the lens group and used for synchronous movement with the first lens; a first magnetic sensor used for detecting a first magnetic field signal of the magnetic member; and a controller electrically connected with the first magnetic sensor, used for acquiring the first magnetic field signal sent by the first magnetic sensor, determining a first position of the first lens according to the first magnetic field signal, and controlling a second lens in the lens group to adjust to a second position according to the first position and a mapping relationship, so as to realize aberration compensation. Through the feedback system composed of the magnetic member and the first magnetic sensor, the positioning accuracy and the position adjusting accuracy of the optical system are improved, and the imaging quality is improved.

Description

Technical Field

[0001] This application belongs to the field of precision optics, and in particular relates to an optical system. Background Technology

[0002] In the field of precision optical systems, electronic viewfinders and optical inspection equipment are increasingly demanding higher image quality and focusing accuracy. Dynamic focusing is a common method for adjusting lenses by detecting their positions within the optical system. However, existing optical systems have relatively low precision in lens positioning and adjustment, which affects image quality. Utility Model Content

[0003] In view of this, embodiments of this application provide an optical system that can improve the positioning accuracy and position adjustment accuracy of a lens.

[0004] A first aspect of this application provides an optical system, including: A lens group, comprising a plurality of lenses arranged sequentially along the optical path direction; A magnetic component is fixedly connected to the first lens in the lens group and is used to move synchronously with the first lens. A first magnetic sensor is used to detect a first magnetic field signal of the magnetic component; The controller, electrically connected to the first magnetic sensor, is used to acquire the first magnetic field signal sent by the first magnetic sensor, determine the first position of the first lens based on the first magnetic field signal, and control the second lens in the lens group to adjust to the second position based on the first position and the mapping relationship, so as to achieve aberration compensation.

[0005] In one embodiment, the optical system further includes a first guide rail and a first driving member, the first driving member being used to drive the first lens to move along the first guide rail.

[0006] In one embodiment, the optical system further includes a second guide rail and a second driving member, the second driving member being electrically connected to the controller and used to drive the second lens to move along the second guide rail according to the instructions of the controller.

[0007] In one embodiment, the first driving element includes an adjusting impeller, and the second driving element includes a stepper motor and gears.

[0008] In one embodiment, the optical system further includes an adjustment element for adjusting the mounting angle of the first guide rail and / or the second guide rail.

[0009] In one embodiment, the optical system further includes a first elastic element mounted between the first lens and the first guide rail, and / or, the optical system further includes a second elastic element mounted between the second lens and the second guide rail.

[0010] In one embodiment, the optical system further includes a second magnetic sensor, the first magnetic sensor and the second magnetic sensor being located on opposite sides of the magnetic element, and the controller being configured to determine the first position based on the first magnetic field signal and the second magnetic field signal of the magnetic element detected by the second magnetic sensor.

[0011] In one embodiment, the first magnetic sensor is a Hall sensor, and the magnetic element is a magnetic grating ruler; When a second magnetic sensor is present, the second magnetic sensor is a Hall sensor.

[0012] In one embodiment, the lens group includes a third lens and a fourth lens, the third lens being used to converge light rays, the fourth lens being used to correct the aberrations of the third lens, and the corrected light rays entering the first lens.

[0013] In one embodiment, the lens group further includes a reflective prism, through which the corrected light rays are reflected and then enter the first lens.

[0014] A second aspect of this application provides a control method for an optical system, applied to an optical system including a lens group, a magnetic component that moves synchronously with a first lens in the lens group, and a first magnetic sensor for detecting a first magnetic field signal of the magnetic component. The method includes: Acquire the first magnetic field signal sent by the first magnetic sensor; The first position of the first lens is determined based on the first magnetic field signal; Based on the first position and the mapping relationship, the second lens in the lens group is adjusted to the second position to achieve aberration compensation.

[0015] In one embodiment, the first magnetic field signal is a continuous signal within a preset time period. Determining the first position of the first lens based on the first magnetic field signal includes: When it is determined that the signal change of the first magnetic field signal is greater than a preset threshold, the first position of the first lens is determined based on the first magnetic field signal.

[0016] In one embodiment, the method further includes: The lens group is calibrated, and the mapping relationship is updated based on the calibration result.

[0017] In one embodiment, the lens group is calibrated, and the mapping relationship is updated based on the calibration result, including: Obtain adjustment instructions, and control the movement of the first lens and the second lens according to the adjustment instructions; Upon receiving the calibration completion instruction, the mapping relationship is updated based on the positions of the first lens and the second lens.

[0018] A third aspect of this application provides a controller, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the control method of the optical system as described in the second aspect above.

[0019] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the control method for the optical system as described in the second aspect above.

[0020] The fifth aspect of this application provides a computer program product that, when run on a controller, causes the controller to execute the control method of the optical system described in any one of the second aspects above.

[0021] The beneficial effects of this application embodiment compared to the prior art are as follows: The optical system includes a lens group, a magnetic component, a first magnetic sensor, and a controller. The magnetic component moves synchronously with the first lens in the lens group. The controller determines the first position of the first lens based on the first magnetic field signal of the magnetic component detected by the first magnetic sensor. Based on the first position and the mapping relationship, the controller controls the second lens in the lens group to adjust to a second position to achieve aberration compensation. Since the first position of the first lens is determined based on the first magnetic field signal of the magnetic component, the detection accuracy of the first position is improved. The second position of the second lens is determined by the controller based on the first position and the mapping relationship, which improves the adjustment accuracy. Therefore, the positioning accuracy and position adjustment accuracy of the optical system are improved, thereby improving the imaging quality. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0023] Figure 1 This is a schematic diagram of an optical system provided in an embodiment of this application; Figure 2 This is a schematic diagram illustrating the implementation flow of a control method for an optical system provided in an embodiment of this application; Figure 3 This is a schematic diagram of the controller provided in the embodiments of this application. Detailed Implementation

[0024] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0025] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0026] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0027] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0028] As used in this specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrases "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0029] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] The optical system provided in this application is described below by way of example.

[0031] The optical system provided in this application embodiment can be applied to camera viewfinders or optical inspection fields. For example... Figure 1As shown, an embodiment of this application provides an optical system including a lens group 11, a magnetic component 12, a first magnetic sensor 13, and a controller 14. The lens group 11 includes multiple lenses arranged sequentially along the optical path, including a first lens G3 and a second lens G4. The magnetic component 12 is used to move synchronously with the first lens G3 in the lens group 11, and the first magnetic sensor 13 is used to detect a first magnetic field signal from the magnetic component 12. The controller 14 is used to acquire the first magnetic field signal sent by the first magnetic sensor 13, determine a first position of the first lens G3 based on the first magnetic field signal, and control the second lens G4 in the lens group 11 to adjust to a second position based on the first position and a mapping relationship, thereby achieving aberration compensation.

[0032] The first lens G3 is used for coarse adjustment of magnification, thereby changing the image distance, while the second lens G4 is used to adjust magnification or focal range, thereby compensating for image plane shift. During focusing of the optical system, when the first lens G3 is adjusted, the first magnetic field signal of the magnetic component 12, which moves synchronously with the first lens G3, changes. The controller 14 determines the first position of the first lens G3 based on the first magnetic field signal and a pre-set correspondence between the magnetic field signal and position. Compared to other position sensors, determining the first position of the first lens G3 based on the first magnetic field signal improves the accuracy of the first position detection. After determining the first position, the second lens G4 is adjusted to the second position based on the first position and the mapping relationship, improving the adjustment accuracy of the second position. Therefore, the imaging quality of the optical system can be improved by adjusting the first lens G3 and the second lens G4.

[0033] In one embodiment, the optical system further includes a first guide rail 15 and a first driving member 16, the first driving member 16 being used to drive the first lens G3 to move along the first guide rail 15. Specifically, the magnetic member 12 is fixedly connected to the first lens G3, and both can move on the first guide rail 15. By setting the first guide rail 15, a stable moving path can be provided for the first lens G3, avoiding image plane jitter or misalignment caused during the movement of the first lens G3.

[0034] In one embodiment, the first driving element 16 can be an adjustment wheel. Moving the adjustment wheel causes the first lens G3 to move on the first guide rail 15. By coarsely adjusting the position of the first lens G3 using the adjustment wheel, the magnification of the entire optical system can be quickly adjusted, ensuring that the position of the first lens G3 covers the main focusing range.

[0035] In one embodiment, the optical system further includes a second guide rail 17 and a second driving member. The second driving member is used to drive the second lens G4 to move along the second guide rail 17 according to the instructions of the controller 14. By setting the second guide rail 17, a stable moving path can be provided for the second lens G4, avoiding image plane jitter or misalignment caused during the movement of the second lens G4.

[0036] For example, the second driving component includes a stepper motor and a gear. The stepper motor drives the gear to rotate according to the instructions of the controller 14. The rotation of the gear in turn drives the second lens G4 to move along the second guide rail 17.

[0037] In one embodiment, the optical system further includes a first elastic element installed between the first lens G3 and the first guide rail 15, and a second elastic element installed between the second lens G4 and the second guide rail 17, thereby reducing the impact during the adjustment of the first lens G3 and the second lens G4.

[0038] In one embodiment, the optical system further includes an adjustment member for adjusting the mounting angles of the first guide rail 15 and the second guide rail 17, respectively, so that the angles of the first lens G3 and the second lens G4 can be adjusted by adjusting the first guide rail 15 and the second guide rail 17, respectively, to compensate for the assembly error of the optical system.

[0039] In one embodiment, the optical system further includes a differential amplifier circuit and a filter circuit connected between the controller 14 and the first magnetic sensor 13. The first magnetic field signal detected by the first magnetic sensor 13 is amplified by the differential amplifier circuit and filtered by the filter circuit before being sent to the controller 14, thereby enabling the controller 14 to obtain an effective magnetic field signal and further improving the positioning accuracy of the first lens G3. The cutoff frequency of the filter circuit can be 1kHz to eliminate high-frequency noise.

[0040] In one embodiment, the first magnetic sensor 13 is a Hall sensor with a response frequency of 10 kHz to 20 kHz. The magnetic component 12 is a magnetic scale. The magnetic scale uses a metal strip with alternating magnetic poles as a scale, and its resolution is 0.1 to 0.5 μm. During movement, the magnetic field changes, and the first position of the first lens G3 is determined by detecting the first magnetic field signal of the magnetic scale using the Hall sensor, thus improving the accuracy of position detection. Furthermore, compared with other displacement sensors, the magnetic scale has stronger anti-interference capabilities, enabling the Hall sensor to detect a continuous and stable magnetic field signal, ensuring stable operation of the optical system in complex environments.

[0041] In one embodiment, the optical system further includes a second magnetic sensor. The first magnetic sensor 13 and the second magnetic sensor are located on opposite sides of the magnetic element 12. The controller 14 determines a first position based on the first magnetic field signal and the second magnetic field signal detected by the second magnetic sensor on the magnetic element 12. For example, the controller averages the positions corresponding to the first magnetic field signal and the positions corresponding to the second magnetic field signal to obtain the first position, thereby improving the accuracy of the obtained first position. The second magnetic sensor can also serve as a backup sensor. For example, when the controller 14 detects an abnormality in the first magnetic field signal, it acquires the second magnetic field signal collected by the second magnetic sensor and determines the first position based on the second magnetic field signal. The second magnetic sensor can also be a Hall sensor. By using a Hall sensor to collect magnetic field signals, the accuracy of position detection can be improved within a limited space.

[0042] In one embodiment, the optical system may further include a magnetic element that moves synchronously with the second lens G4. During the movement of the second lens G4, the first magnetic sensor 13 can detect the magnetic field signal of the magnetic element, and the controller verifies the position of the second lens G4 based on the magnetic field signal to ensure that the second lens G4 moves into place, thereby further improving the position adjustment accuracy.

[0043] In one embodiment, the lens group 11 includes a third lens G1 and a fourth lens G2. The third lens G1 is used to converge the light incident on the optical system and determine the fundamental magnification of the optical system. The fourth lens G2 is used to correct the aberrations of the third lens G1. The fourth lens G2 may be a lens optimized using a Gaussian optical design method to correct aberrations such as spherical aberration and chromatic aberration. The corrected light enters the first lens G3, thereby suppressing aberrations before focusing.

[0044] In one embodiment, the lens group 11 further includes a flat glass G5, which does not affect image quality and can protect the optical system. When the optical system is used in a viewfinder or medical device, the flat glass G5 is located at the human eye's observation position.

[0045] In one embodiment, the lens group 11 further includes a reflecting prism G6. The corrected light rays are reflected by the reflecting prism G6 and then enter the first lens G3. After passing through the reflecting prism G6, the light direction rotates by 90°, thereby compressing the volume of the optical system. Furthermore, since the first lens G3 and the second lens G4 are each driven by their respective driving components, by using the reflecting prism G6 to compress the volume of the optical system, the relative movement space between the first lens G3 and the second lens G4 is larger, allowing for the adaptation to more optical requirements.

[0046] For example, in one application scenario, light entering the optical system first enters the third lens G1, where it is initially converged. The converged light then enters the fourth lens G2, which corrects aberrations and improves edge sharpness. Light exiting the fourth lens G2 is reflected by the reflecting prism G6 and enters the first lens G3. Light exiting the first lens G3 passes through the second lens G4 and the flat glass G5 before exiting. The first lens G3 is used for coarse adjustment of magnification to change the image distance, while the second lens G4 is used for rapid adjustment of magnification or focal range to compensate for image plane shift. By first adjusting the first lens G3 to adjust the magnification of the optical system, and then adjusting the second lens G4 to correct image plane quality (e.g., focus sharpness, edge distortion), a clear image can ultimately be observed through the flat glass G5.

[0047] In the above embodiments, by setting a magnetic component 12 that moves synchronously with the first lens G3, the first position of the first lens G3 is determined by the positioning device composed of the first magnetic sensor 13 and the magnetic component 12, and the position of the second lens G4 is adjusted according to the first position and the mapping relationship to achieve dynamic aberration compensation, thereby improving the positioning accuracy and position adjustment accuracy.

[0048] This application also provides a control method for an optical system, applied to the aforementioned optical system. The optical system includes a lens group, a magnetic component that moves synchronously with a first lens in the lens group, and a first magnetic sensor for detecting a first magnetic field signal of the magnetic component. The control method for the optical system is executed by a controller. Figure 2 As shown, steps S201 to S203 of the control method for an optical system provided in an embodiment of this application are illustrated.

[0049] S201: Acquire the first magnetic field signal sent by the first magnetic sensor.

[0050] For example, the magnetic component can be a magnetic grating ruler, and the first magnetic sensor can be a Hall sensor. When the magnetic component and the first lens move synchronously, the first magnetic field signal of the magnetic component changes. When the first magnetic sensor detects the change in the first magnetic field signal, it sends a first magnetic field signal to the controller. The controller and the first magnetic sensor can communicate via bus, Bluetooth, or Wi-Fi.

[0051] In this scenario, the user can move the first lens by adjusting the dial, or the controller can move the first lens to a preset range when the optical system is started. The preset range can be set in advance or determined according to the user's usage habits.

[0052] S202: Determine the first position of the first lens based on the first magnetic field signal.

[0053] Specifically, the controller determines the first position of the first lens based on the pre-set correspondence between the magnetic field signal and the position.

[0054] In one embodiment, the first magnetic field signal is a continuous signal within a preset time period. The controller reads the first magnetic field signal from the first magnetic sensor in real time. After reading the first magnetic field signal, it determines whether the signal change of the first magnetic field signal is greater than a preset threshold. If the signal change of the first magnetic field signal is greater than the preset threshold, it indicates that the first lens and the magnetic component have moved effectively. Then, the first position of the first lens is determined based on the first magnetic field signal, thereby preventing malfunctions and ensuring that effective position information is obtained. The controller can adjust the preset threshold according to the environment in which the optical system is located.

[0055] In one embodiment, the optical system further includes a second magnetic sensor. The first and second magnetic sensors are located on opposite sides of the magnetic component. The controller determines a first position of the first lens based on the first magnetic field signal and the second magnetic field signal detected by the second magnetic sensor. For example, the controller averages the position corresponding to the first magnetic field signal and the position corresponding to the second magnetic field signal to obtain the first position, thereby improving the accuracy of the obtained first position.

[0056] S203: Based on the first position and the mapping relationship, control the second lens in the lens group to adjust to the second position to achieve aberration compensation.

[0057] Specifically, the mapping relationship is the correspondence between the positions of the first lens and the second lens, obtained through pre-calibration of the optical system. The controller determines the second position based on the first position and the mapping relationship, and controls the second lens to move to the second position. For example, after determining the second position, the controller instructs a stepper motor to drive the second lens to move to the second position.

[0058] In one embodiment, the control method of the optical system further includes calibrating the lens group, updating the mapping relationship according to the calibration result, and adjusting the position of the second lens according to the updated mapping relationship during subsequent focusing, thereby ensuring the stability of the optical system.

[0059] In one embodiment, the controller can focus the optical system according to the user's adjustment commands and update the mapping relationship. Specifically, the controller includes a control interface or control buttons, through which the user inputs adjustment commands for the first and second lenses. After receiving the adjustment commands, the controller controls the first and second lenses to move sequentially. During the adjustment process, the user can determine whether the correction is complete by observing the imaging of the optical system. When the correction is complete, the controller receives the correction completion command input by the user and updates the mapping relationship according to the positions of the first and second lenses. Specifically, the controller can update the mapping relationship based on the position of the first lens and the corresponding position of the second lens during the adjustment process. For example, the controller can fit the position of the first lens and the corresponding position of the second lens to obtain a fitting curve, which is then used as the updated mapping relationship. The controller can also input the position of the first lens and the corresponding position of the second lens into an aberration compensation model to obtain the mapping relationship output by the aberration compensation model. Alternatively, the controller can output the position of the first lens and the corresponding position of the second lens during the adjustment process, allowing the user to generate an updated mapping relationship based on the positions of the first and second lenses and upload it to the controller, which then replaces the original mapping relationship with the updated one.

[0060] In the above embodiments, the magnification can be dynamically adjusted by moving the magnetic component and the first lens synchronously. The controller determines the first position of the first lens based on the first magnetic field signal detected by the first magnetic sensor, and controls the second lens to adjust to the second position based on the first position and the mapping relationship. This achieves dynamic focusing and improves the position adjustment accuracy, thereby improving the imaging quality.

[0061] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0062] Figure 3 This is a schematic diagram of the controller provided in an embodiment of this application. The controller may be a computing device such as a computer or server.

[0063] like Figure 3 As shown, the controller in this embodiment includes a processor 31, a memory 32, and a computer program 33 stored in the memory 32 and executable on the processor 31. When the processor 31 executes the computer program 33, it implements the steps in the control method embodiment of the optical system described above, for example... Figure 2 Steps S201 to S203 are shown.

[0064] For example, the computer program 33 may be divided into one or more modules / units, which are stored in the memory 32 and executed by the processor 31 to complete this application. The one or more modules / units may be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program 33 in the controller.

[0065] Those skilled in the art will understand that Figure 3 This is merely an example of a controller and does not constitute a limitation on the controller. It may include more or fewer components than illustrated, or combine certain components, or different components. For example, the controller may also include input / output devices, network access devices, buses, etc.

[0066] The processor 31 can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0067] The memory 32 can be an internal storage unit of the controller, such as the controller's hard drive or memory. The memory 32 can also be an external storage device of the controller, such as a plug-in hard drive, Smart Media Card (SMC), Secure Digital (SD) card, or FlashCard. Furthermore, the memory 32 can include both internal and external storage units of the controller. The memory 32 is used to store the computer program and other programs and data required by the controller. The memory 32 can also be used to temporarily store data that has been output or will be output.

[0068] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0069] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0070] In the embodiments provided in this application, it should be understood that the disclosed devices / controllers and methods can be implemented in other ways. For example, the device / controller embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0071] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0072] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0073] If an integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc. Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0074] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An optical system, characterized in that, include: A lens group, comprising a plurality of lenses arranged sequentially along the optical path direction; A magnetic component is fixedly connected to the first lens in the lens group and is used to move synchronously with the first lens. A first magnetic sensor is used to detect a first magnetic field signal of the magnetic component; The controller, electrically connected to the first magnetic sensor, is used to acquire the first magnetic field signal sent by the first magnetic sensor, determine the first position of the first lens based on the first magnetic field signal, and control the second lens in the lens group to adjust to the second position based on the first position and the mapping relationship, so as to achieve aberration compensation.

2. The optical system according to claim 1, characterized in that, The optical system further includes a first guide rail and a first driving member, wherein the first driving member is used to drive the first lens to move along the first guide rail.

3. The optical system according to claim 2, characterized in that, The optical system further includes a second guide rail and a second driving component. The second driving component is electrically connected to the controller and is used to drive the second lens to move along the second guide rail according to the instructions of the controller.

4. The optical system according to claim 3, characterized in that, The first driving component includes an adjusting impeller, and the second driving component includes a stepper motor and gears.

5. The optical system according to claim 3, characterized in that, The optical system also includes an adjustment element for adjusting the mounting angle of the first guide rail and / or the second guide rail.

6. The optical system according to claim 3, characterized in that, The optical system further includes a first elastic element installed between the first lens and the first guide rail, and / or the optical system further includes a second elastic element installed between the second lens and the second guide rail.

7. The optical system according to claim 1, characterized in that, The optical system further includes a second magnetic sensor. The first magnetic sensor and the second magnetic sensor are located on both sides of the magnetic component. The controller is used to determine the first position based on the first magnetic field signal and the second magnetic field signal of the magnetic component detected by the second magnetic sensor.

8. The optical system according to claim 1 or 7, characterized in that, The first magnetic sensor is a Hall sensor, and the magnetic component is a magnetic grating ruler; When a second magnetic sensor is present, the second magnetic sensor is a Hall sensor.

9. The optical system according to claim 1, characterized in that, The lens group includes a third lens and a fourth lens. The third lens is used to converge light rays, and the fourth lens is used to correct the aberrations of the third lens. The corrected light rays then enter the first lens.

10. The optical system according to claim 9, characterized in that, The lens group also includes a reflective prism, and the corrected light rays are reflected by the reflective prism and then enter the first lens.

Images