Operating microscope zoom large objective lens module and system
By combining a moving lens group with apochromatic optical design, the problems of discontinuous focal length and working distance adjustment and insufficient apochromaticity in surgical microscope systems are solved, achieving smooth zoom and a large operating space, thus improving imaging quality and ease of operation.
Patent Information
- Application Number
- CN202423037207.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-10
AI Technical Summary
Existing surgical microscope large objective systems suffer from problems such as insufficient continuous focus adjustment, limited working distance adjustment range, inadequate achromatic design, and high system design complexity, which affect the smoothness of surgical operations and the clarity of imaging.
It employs an adjustable moving lens group and apochromatic optical design, combined with an anti-telephoto optical structure, to achieve continuous adjustment of focal length and working distance. It uses H-FK61 anomalous dispersion glass material to correct chromatic aberration and simplifies the optical structure.
It improves the smoothness and flexibility of surgical procedures, expands the operating space, enhances imaging clarity, reduces system size and weight, and adapts to the needs of complex surgeries.
Smart Images
Figure CN223650820U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of microscopy, in particular to a zooming macro objective lens for surgical microscopes. BACKGROUND
[0002] In modern microsurgery, surgical microscopes are indispensable tools that provide surgeons with a clear and high-magnification surgical field, facilitating precise operations. The optical performance of surgical microscopes, such as resolution, working distance, and focal length range, directly affects the precision and success rate of surgical operations. In recent years, research on surgical microscopes has made certain progress in improving optical quality, enhancing operational flexibility, and adapting to different surgical scenarios.
[0003] Currently, mainstream surgical microscope macro objective lens systems mainly adopt single fixed focal length design or multi-section zoom design. Although the fixed focal length design can provide higher imaging quality, its working distance is not adjustable, and the operation space during surgery is limited, making it difficult to adapt to complex and variable surgical requirements. The multi-section zoom design can achieve changes in magnification by switching different focal lengths, but this switching is often segmented and not continuous, leading to uneven imaging during surgery and affecting the operation experience of surgeons.
[0004] In terms of achromatic design, traditional surgical microscopes usually adopt simple achromatic lens design, which corrects chromatic aberration to some extent, but residual chromatic aberration still exists for higher precision surgical scenarios, affecting the clarity of imaging and the accuracy of surgery. In addition, the working distance adjustment range of existing surgical microscopes is often small, which cannot provide sufficient operation space while maintaining high-quality imaging. This becomes a significant technical bottleneck in complex surgeries, especially those requiring frequent adjustment of viewing angle and position.
[0005] For example, existing zoom systems often need to increase the complexity of optical design to achieve a larger magnification change, resulting in an increase in system size and affecting the operability and flexibility of surgical microscopes. In addition, the limitations of working distance also limit the freedom of operation space for surgeons during surgery, especially when performing delicate procedures on the head, spine, and other parts, which require high operation requirements for surgical microscopes. However, existing optical systems often struggle to balance long working distance and high resolution.
[0006] In summary, the existing surgical microscope macro objective lens system has the following technical problems:
[0007] 1. Focal length adjustment is not continuous, making it difficult to achieve smooth zooming and affecting the smoothness of surgical operations;
[0008] 2. The working distance adjustment range is limited, which cannot provide sufficient operation space for the operator;
[0009] 3. The achromatic design is insufficient, which affects the imaging clarity;
[0010] 4. The system design is complex and large in size, which affects the operation flexibility. Invention content
[0011] To solve the technical defects of the existing surgical microscope objective system, such as insufficient continuous focal length adjustment, limited working distance adjustment range, insufficient achromatic design, and excessive complexity, the technical solution provided by the present application is:
[0012] A surgical microscope zoom objective module, comprising:
[0013] A fixed lens group comprising lens one, lens two, lens three, and lens four, wherein lens three and lens four are combined to form a cemented lens;
[0014] A moving lens group coaxially arranged with the fixed lens group
[0015] The moving lens group comprises lens five and lens six, and the moving lens group can move along a preset optical axis.
[0016] Further, a preferred embodiment is provided, wherein the lens four is implemented by using an anomalous dispersion glass H-FK61 and is arranged closely to the lens three.
[0017] Further, a preferred embodiment is provided, wherein the lens one, lens three, and lens six are meniscus lenses, the lens two and lens four are double convex lenses, and the lens five is a double concave lens.
[0018] Further, a preferred embodiment is provided, further comprising a lens barrel one, wherein the lens one, lens two, and lens three are arranged in the lens barrel one.
[0019] Further, a preferred embodiment is provided, further comprising a lens barrel three and a lens barrel two, wherein the lens five and lens six are arranged in the lens barrel three, the lens barrel three is in the lens barrel two, and the lens barrel three moves along the axial direction of the lens barrel two.
[0020] Based on the same inventive concept, the present application also provides a surgical microscope zoom objective system, comprising:
[0021] The focal length adjustment range of the module is 240mm to 407.8mm, and the working distance adjustment range is 200mm to 500mm.
[0022] Based on the same inventive concept, the present application also provides a surgical microscope zoom objective system control method for controlling the system, comprising:
[0023] collecting input instructions and calculating focal length and working distance adjustment values;
[0024] generating control signals through the focal length and working distance adjustment values and feeding back adjustment results.
[0025] Based on the same utility model concept, the utility model still provides computer storage medium, is used for storing calculation program, when the computer reads the computer program, the computer executes the method.
[0026] Based on the same utility model concept, the utility model still provides computer, including processor and storage medium, when the processor reads the computer program stored in the storage medium, the computer executes the method.
[0027] Based on the same utility model concept, the utility model still provides computer program product, as computer program, when the computer program is executed, realizes the method.
[0028] Compared with prior art, the technical scheme provided by the utility model has the beneficial effects that:
[0029] The continuous adjustment of focal length and working distance improves the operation fluency:
[0030] The continuous change of focal length and working distance is realized by the adjustable moving lens group. This design realizes the smooth transition of working distance from 200mm to 500mm and focal length from 240mm to 407.8mm through the relative movement of lens five and lens six along the optical axis. Compared with the multi-section zoom design in prior art, the continuous adjustment system eliminates the sudden change phenomenon of traditional system when switching focal length, greatly improves the operation fluency and flexibility in the operation process. This continuous focal length adjustment mode enables the surgeon to adjust the magnification and field of view of the microscope more smoothly during the operation, improves the precision and safety of the operation.
[0031] The increase of working distance adjustment range improves the operation space:
[0032] The technical scheme adopts the reverse telephoto type structure design, wherein the negative power lens group is used as the front group and the positive power lens group is used as the rear group, so that a longer working distance can be obtained at the same focal length. The design expands the working distance adjustment range from the traditional small range to 200mm to 500mm. This innovation greatly enhances the operation space of the surgeon in complex operations, especially in delicate operations such as head and spine, which can provide more freedom and avoid the space compression and inconvenience caused by the limited working distance of traditional systems.
[0033] The achromatic optical design improves the imaging clarity:
[0034] In this scheme, lens four adopts an abnormal dispersion glass H-FK61, which can correct the second spectrum and eliminate the chromatic aberration problem commonly seen in traditional designs. Compared with the simple achromatic design in traditional surgical microscope systems, the complex achromatic optical design of this scheme can effectively improve the resolution of the system, making the imaging clearer and more delicate. This design not only ensures the imaging quality at high magnification, but also avoids the imaging blur caused by chromatic aberration in traditional designs, especially in high-precision surgeries, providing more reliable visual support.
[0035] The system volume and weight are reduced by the simplified optical structure design:
[0036] Through the optical structure design, excessive optical element stacking is avoided, so that the system maintains a relatively simple structure while ensuring high performance. This is in sharp contrast to the complex and bulky optical systems in the prior art, which often use multiple optical elements to increase the system volume and weight, reducing the convenience and flexibility of the surgical microscope. Through the simplified design, the volume and weight of the equipment are reduced while ensuring high-quality imaging, improving the convenience of operation and the comfort of the doctor.
[0037] Suitable for application in the design work of the surgical microscope objective system. BRIEF DESCRIPTION OF DRAWINGS
[0038] Figure 1 is a cross-sectional schematic diagram of a surgical microscope zoom objective system;
[0039] Figure 2 is a perspective schematic diagram of a surgical microscope zoom objective module;
[0040] Figure 3 is a front view of Figure 2 ;
[0041] Figure 4 is a working optical path schematic diagram of the system under the condition of an entrance pupil diameter of 15, a working distance of 200, and a focal length F240;
[0042] Figure 5 is a front view of Figure 4 ;
[0043] Figure 6 is a working optical path schematic diagram of the system under the condition of an entrance pupil diameter of 15, a working distance of 500, and a focal length F407.8;
[0044] Figure 7 is a front view of Figure 6 ;
[0045] Figure 8A schematic diagram of the working optical path of the system under the conditions of entrance pupil diameter 3, working distance 200, and focal length F240;
[0046] Figure 9 for Figure 8 MTF chart;
[0047] Figure 10 The schematic diagram of the working optical path of the system is shown under the conditions of pupil diameter 3, working distance 500, and focal length F407.8.
[0048] Figure 11 for Figure 10 The MTF chart.
[0049] Among them, 1 is lens one, 2 is lens two, 3 is lens three, 4 is lens four, 5 is lens five, 6 is lens six, 7 is lens tube one, 8 is lens tube two, and 9 is lens tube three. Detailed Implementation
[0050] To make the advantages and benefits of the technical solution provided by this utility model clearer, the technical solution provided by this utility model will now be described in further detail with reference to the accompanying drawings. Specifically:
[0051] Implementation Method 1: This implementation method provides a large zoom objective lens module for a surgical microscope, comprising:
[0052] The fixed lens group includes lens 1, lens 2, lens 3, and lens 4. Lens 3 and lens 4 are combined to form a cemented lens.
[0053] Coaxially arranged with the fixed lens group
[0054] The movable mirror assembly includes lens 5 and lens 6, which are capable of moving along a preset optical axis.
[0055] Implementation Method 2: This implementation method further defines the large zoom objective lens module for a surgical microscope provided in Implementation Method 1. The fourth lens 4 is made of aberrant dispersion glass H-FK61 and is set close to the third lens 3.
[0056] Implementation Method 3: This implementation method further defines the large zoom objective lens module for a surgical microscope provided in Implementation Method 1. Lens 1, 3, and 6 are concave and convex lenses, lens 2 and 4 are biconvex lenses, and lens 5 is a biconcave lens.
[0057] Implementation Method 4: This implementation method further defines the large zoom objective lens module for a surgical microscope provided in Implementation Method 1, and also includes a microscope tube 7, wherein the lens 1, lens 2 and lens 3 are disposed within the microscope tube 7.
[0058] Embodiment five, the embodiment is further limited to the zoom objective module of the surgical microscope provided in embodiment one, further comprising a third barrel 9 and a second barrel 8, the lens five 5 and the lens six 6 are arranged in the third barrel 9, and the third barrel 9 is arranged in the second barrel 8 and moves along the axial direction of the second barrel 8.
[0059] Embodiment six, the embodiment provides a zoom objective system of a surgical microscope, comprising:
[0060] The focal length adjustment range of the system provided by the module of embodiment one is 240mm to 407.8mm, and the working distance adjustment range is 200mm to 500mm.
[0061] Specifically:
[0062] System structure design
[0063] The zoom objective system of the surgical microscope with adjustable focal length and working distance is designed. The system is composed of multiple optical lenses, barrels and interconnected lens groups, wherein the fixed lens group and the moving lens group have different functions respectively.
[0064] Structure of fixed lens group and moving lens group
[0065] The fixed lens group comprises lens one 1 to lens four 4 and part of the first barrel 7, and is used to maintain the stability of the optical system; the moving lens group comprises lens five 5 and lens six 6, and the adjustment of the focal length and the working distance is realized by the relative movement along the optical axis.
[0066] Adjustment of focal length and working distance
[0067] By controlling the movement of the moving lens group along the optical axis, the focal length and the working distance of the system can be adjusted, the focal length range is from 240mm to 407.8mm, and the working distance is from 200mm to 500mm.
[0068] Achromatic optical design
[0069] In the design, lens four 4 uses H-FK61 glass material, corrects secondary spectrum, improves system resolution, reduces chromatic aberration, and thus improves imaging quality.
[0070] Reverse telephoto type structure of optical system
[0071] The system adopts a reverse telephoto type optical structure, a negative power lens group as a front group and a positive power lens group as a rear group, and optimizes the length of the working distance.
[0072] Detailed description of the embodiment:
[0073] System structure design
[0074] The surgical microscope objective system of the present solution includes multiple optical elements, among which lenses one 1 to six 6 constitute the entire optical path of the system. The system is divided into a fixed lens group and a moving lens group. The fixed lens group is composed of lens one 1, lens two 2, lens three 3, lens four 4 and lens barrel one 7, which is responsible for providing stable optical performance; while the moving lens group is composed of lens five 5 and lens six 6, which can move along a certain trajectory in the optical axis direction through the sliding cooperation of lens barrel two 8 and lens barrel three 9, for realizing the continuous change of focal length and working distance.
[0075] Specifically, lens one 1 and lens two 2 in the fixed lens group and lens three 3 and lens four 4 combined with the cemented lens group jointly ensure the stability of the optical path. Lens five 5 and lens six 6 form the moving lens group, and by controlling their relative positions, the change of focal length and working distance is realized.
[0076] Structure of fixed lens group and moving lens group
[0077] In optical design, lens three 3 and lens four 4 act as a cemented lens group, which plays a role in achromatism. The design of cemented lens can effectively reduce dispersion and ensure the quality of imaging. The other parts of the fixed lens group, such as lens one 1 and lens two 2, ensure the high stability of the optical system through the synergistic effect with the cemented lens.
[0078] Lens five 5 and lens six 6 of the moving lens group are controlled by precise mechanical devices, and their movement along the optical axis can change the focal length and working distance of the optical system. The design structure of the moving lens group ensures the continuous change of focal length and working distance, and makes this change very smooth in actual use, without the phenomenon of sudden change of focal length in traditional zoom systems.
[0079] Adjustment of focal length and working distance
[0080] By controlling the relative movement between lens five 5 and lens six 6, the continuous adjustment of focal length can be realized. The focal length adjustment range is 240mm to 407.8mm, and the working distance adjustment range is 200mm to 500mm. Within this range, users can freely adjust the focal length and working distance of the microscope according to the needs of the operation, so as to obtain the ideal field of view and operation space.
[0081] When realizing the adjustment of focal length and working distance, the system design ensures the smoothness of these adjustments. Through precise mechanical control, the relative position change of lens five 5 and lens six 6 will not affect the image, ensuring the stability of the system imaging and the fluency of the operation. The range of focal length adjustment and the change of working distance make the system particularly suitable for complex surgical needs, especially for surgical operations that require larger operation space and fine images.
[0082] Achromatic optical design
[0083] The lens group 4 adopts high-performance anomalous dispersion glass H-FK61, which can effectively correct the chromatic aberration of the second spectrum, greatly improving the resolution of the optical system. Compared with the traditional surgical microscope optical design, this complex achromatic design not only eliminates the influence of chromatic aberration, but also effectively improves the resolution of the system and enhances the clarity of the image.
[0084] The advantage of this optical design is that it can maintain the clarity of the image even at high magnification, reducing the image blur caused by chromatic aberration, especially in complex surgical operations, it can provide higher quality of vision support, and ensure the accuracy and safety of the surgical process.
[0085] Optical system of reverse telephoto type structure
[0086] The present embodiment adopts a reverse telephoto type optical structure, with a negative power lens group located in the front and a positive power lens group located in the back. This design can obtain a longer working distance while maintaining the same focal length, thereby providing more operating space for the surgeon.
[0087] The advantage of the reverse telephoto type structure is that the working distance of the system can be effectively extended even if the focal length remains unchanged, providing more space and higher operating flexibility for surgical operations. This is particularly suitable for complex surgeries, especially for head and spine surgery scenarios that require a longer working distance to provide more operating space.
[0088] Embodiment seven, the present embodiment provides a surgical microscope zoom macro objective system control method for controlling the system provided by embodiment six, comprising:
[0089] The steps of collecting input instructions and calculating focal length and working distance adjustment values;
[0090] The steps of generating a control signal through the focal length and working distance adjustment values, and feeding back the adjustment results.
[0091] Embodiment eight, the present embodiment provides a computer storage medium for storing a computer program, when the computer reads the computer program, the computer executes the method provided by embodiment seven.
[0092] Embodiment nine, the present embodiment provides a computer comprising a processor and a storage medium, when the processor reads the computer program stored in the storage medium, the computer executes the method provided by embodiment seven.
[0093] Embodiment ten, the present embodiment provides a computer program product as a computer program, when the computer program is executed, the method provided by embodiment seven is realized.
[0094] Embodiment eleven, in combination Figures 1-11 The present embodiment is described in detail by specific examples, which are provided above. Specifically:
[0095] As Figures 1-3 shown.
[0096] 1. System structure design
[0097] The present embodiment provides a surgical microscope zoom objective system with adjustable focal length and working distance. The system includes two parts: a fixed lens group and a moving lens group. The fixed lens group contains lenses one to three, and the moving lens group contains lenses five and six. The fixed lens group and the moving lens group are connected by precision mechanical connectors to ensure the stability and optical precision of the system components.
[0098] Fixed lens group: lenses one and two are combined into lens three by cemented lenses, responsible for stably guiding the light beam. The arrangement of these lenses and their positions are fixed, ensuring the stability of the optical path and the continuity of the image quality.
[0099] Moving lens group: lenses five and six constitute a movable lens group, which moves relatively along the optical axis direction under precise control to adjust the focal length and working distance. The design of the moving lens group not only ensures the continuous change of the focal length and working distance, but also makes the adjustment process of the focal length and working distance smooth without sudden changes.
[0100] 2. Connection between fixed lens group and moving lens group
[0101] The fixed lens group and the moving lens group are connected by mechanical connectors, which are step motors or servo motors. The precise control of step motors or servo motors can ensure the accurate position adjustment of the moving lens group in the optical axis direction, thereby adjusting the focal length and working distance.
[0102] Mechanical connector: the moving lens group is driven by a step motor or a servo motor to accurately adjust the positions of lenses five and six according to the instructions from the control module, thereby realizing the adjustment of the focal length and working distance. The precise design of the connector ensures the smoothness and high precision of the focal length and working distance adjustment.
[0103] 3. Adjustment of focal length and working distance
[0104] The surgical microscope system of the present embodiment can achieve a focal length adjustment range of 240mm to 407.8mm and a working distance adjustment range of 200mm to 500mm. The adjustment of focal length and working distance is achieved by moving the relative displacement of the lens group, and this process is continuous. The system design ensures that the adjustment of focal length and working distance is smooth and accurate, so that the surgeon can adjust the field of view and operating space of the microscope as needed during the operation.
[0105] Adjustment principle: The control module receives the operation instructions input by the user, calculates the required focal length and working distance values, and then controls the displacement of the moving lens group through stepper motors or servo motors. The continuous adjustment of focal length and working distance does not produce abrupt changes, allowing the surgeon to switch between different operating modes and fields of view in real time and smoothly.
[0106] 4. Aplanatic optical design
[0107] To improve the imaging quality of the system, especially the image clarity at high magnification, the present embodiment adopts aplanatic optical design. Lens four 4 uses high-performance anomalous dispersion glass H-FK61, which can effectively correct the chromatic aberration of the second spectrum, thereby improving the resolution and imaging clarity of the system.
[0108] Optical improvement: The aplanatic design using H-FK61 material eliminates the common chromatic aberration problem in traditional optical design. This design improves the imaging quality of the microscope system, and even at high magnification, it can still maintain the details and clarity of the image, avoiding the imaging blur caused by chromatic aberration.
[0109] 5. Inverted telephoto type optical structure design
[0110] The present embodiment also adopts an inverted telephoto type optical structure design, i.e. a negative focal length lens group as the front group and a positive focal length lens group as the rear group. Through this design, the system can obtain a longer working distance at the same focal length, thereby providing more operating space for the surgeon.
[0111] Structural advantage: The use of inverted telephoto type structure design not only provides a longer working distance in a smaller focal length range, but also increases the freedom of operation during surgery. This design is particularly suitable for complex surgeries that require a larger operating space, such as surgeries on the head, spine, etc.
[0112] 6. Control module and software design
[0113] The system includes a control module for adjusting the focal length and working distance. The control module receives operation instructions through the input device and controls the relative position of the moving lens group through the motor. The control module is operated through special control software, calculates the focal length and working distance adjustment value, and performs precise adjustment.
[0114] Control software functionality: The control software is capable of receiving user inputted operation instructions, automatically calculating the required focal length and working distance adjustment values. The software also includes real-time feedback functionality, capable of feeding back the current focal length and working distance according to the actual operation situation, and allowing the user to make further adjustments. If the system deviates in focal length or working distance, the software also has an automatic calibration function to ensure that the system always maintains a high-precision working state.
[0115] 7. Temperature control device
[0116] To avoid the influence of thermal expansion of the optical system on performance during long-term use, the present embodiment is also equipped with a temperature control device in the surgical microscope system. This device can adjust the internal temperature of the system to ensure that the system operates in stable environmental conditions.
[0117] Temperature control design: The design of the temperature control device enables the system to maintain stable optical performance during long-term operation, avoiding the expansion or contraction of optical elements caused by temperature changes, thereby ensuring imaging quality and system stability.
[0118] 8. Workflow
[0119] The workflow of the surgical microscope system is as follows:
[0120] Step one: Receive user inputted operation instructions indicating the required focal length and working distance.
[0121] Step two: Calculate the required focal length and working distance adjustment values and transmit the adjustment values to the control module.
[0122] Step three: The control module drives the moving mirror group through the motor to accurately adjust the focal length and working distance.
[0123] Step four: Real-time monitoring of the changes in focal length and working distance, the system optimizes the adjustment strategy according to the feedback signal.
[0124] Step five: Provide real-time feedback to allow the user to make adjustments according to the needs during the operation.
[0125] This workflow ensures that the surgical microscope system can quickly and accurately respond to the needs of surgeons in actual use and provide a smooth operation experience.
[0126] Figures 4-11 are optical system diagrams and MTF curve graphs under different working conditions.
[0127] Among them, the parameters of the lens are as follows:
[0128]
[0129] The air gap between the lens four 4 and the lens five 5 is 5-40mm, when the distance is 40mm, the working distance is 200mm, and the focal length is F240mm; when the distance is 5mm, the working distance is 500mm, and the focal length is F407.8mm.
[0130] The above further describes the technical solutions provided by the utility model through several specific embodiments, in order to highlight the advantages and beneficial effects of the technical solutions provided by the utility model, but the above several specific embodiments are not used as the limitation of the utility model, any reasonable modification and improvement of the utility model, combination and equivalent replacement of the embodiments, etc. based on the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A surgical microscope zoom macro objective module, characterized in that Comprise: Fixed mirror group, including lens one, lens two, lens three and lens four, lens three and lens four combination forms cemented lens; With the fixed mirror group coaxial setting Moving mirror group, including lens five and lens six, the moving mirror group can move along the preset optical axis axis.
2. A surgical microscope zoom macro objective module according to claim 1, characterized in that The lens four is realized by using abnormal dispersion glass H-FK61, which is closely arranged with the lens three.
3. A surgical microscope zoom macro objective module according to claim 1, characterized in that The lens one, lens three and lens six are meniscus lenses, the lens two and lens four are double convex lenses, and the lens five is a double concave lens.
4. A surgical microscope zoom macro objective module according to claim 1, characterized in that It also includes a lens barrel one, the lens one, lens two and lens three are arranged in the lens barrel one.
5. A surgical microscope zoom macro objective module according to claim 1, characterized in that It also includes a lens barrel three and a lens barrel two, the lens five and the lens six are arranged in the lens barrel three, the lens barrel three is in the lens barrel two, and moves along the axis direction of the lens barrel two.
6. A surgical microscope zoom macro objective system, characterized in that Comprise: The module of claim 1, the focal length adjustment range of the system is 240mm to 407.8mm, and the working distance adjustment range is 200mm to 500mm.