Relay assembly and system for operating microscope
By using a double cemented lens combination with a symmetrical optical structure design, the imaging problem of the surgical microscope optical system after the functional modules are expanded is solved, realizing a microscope design with high resolution and multifunctional expansion, which is suitable for surgical microscopes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2026-04-07
AI Technical Summary
Existing surgical microscope optical systems suffer from problems such as edge beam shearing, reduced resolution, and narrowed imaging range after functional module expansion.
The system employs a symmetrical optical structure design of "A+B+B+A" and uses a combination of cemented doublet lenses, including biconvex lenses and meniscus lenses, to correct optical chromatic aberration, optimize the optical performance of the relay lens group, and achieve optical path compression and improved imaging quality.
It significantly improves edge resolution and brightness, enhancing the applicability and flexibility of the imaging system, making it suitable for complex surgical scenarios.
Smart Images
Figure CN224096080U_ABST
Abstract
Description
Technical Field
[0001] This relates to the field of surgical microscope technology, and more specifically to relay systems used in surgical microscopes. Background Technology
[0002] Surgical microscopes are essential precision instruments in modern surgery, widely used in neurosurgery, ophthalmology, otolaryngology, and other fields. Through their high-resolution optical systems and multifunctional accessories, they help surgeons obtain clear local views during complex procedures, improving surgical safety and precision.
[0003] Currently, most surgical microscopes employ infinity-corrected optical systems to facilitate the integration of various functional modules into the imaging optical path, such as image interfaces, optical extenders, magnifiers, and auxiliary lenses. This design enhances the modularity of the microscope system, enabling it to meet the needs of different surgical scenarios. For example:
[0004] Image interface and imaging system: By adding an image interface, the microscope can capture and record the surgical procedure in real time, providing high-quality image support for subsequent teaching, scientific research and case analysis.
[0005] Assistant scope and multi-view extension: The assistant scope can provide independent observation paths for collaborating surgeons, facilitating multi-party collaborative operations.
[0006] Optical extenders and multipliers: Optical extenders can expand the imaging optical path, while multipliers can further increase the magnification, suitable for surgical scenarios with extremely high precision requirements.
[0007] However, in the prior art, when the above-mentioned functional modules are added to the optical system of a surgical microscope, the length of the imaging optical path increases significantly with the increase of functional expansion, leading to the following technical problems:
[0008] Edge field of view ray shearing phenomenon: Due to the extension of the optical path, the light rays in the edge field of view of the system may be restricted, resulting in the shearing of some light rays.
[0009] Reduced edge resolution and image darkening: The shearing phenomenon further leads to a significant decrease in the resolution of the imaging system's edges, while the image brightness is also insufficient.
[0010] Reduced imaging range: The expansion of the optical path may limit the effective imaging range of the system, making it unable to meet the needs of some complex surgeries.
[0011] For example, when using a conventional optical extender in an existing surgical microscope, the imaging range is often reduced, and there are black borders in the eyepiece field of view.
[0012] In summary, while existing technologies offer flexibility in terms of functional module expansion, they also present the following technical challenges in optical system design:
[0013] How to simultaneously meet the needs of multiple functional modules within a limited optical path length;
[0014] How to reduce the negative impact of optical path extension on image quality, including aberrations and edge ray shearing;
[0015] How to improve the overall optical performance of microscope imaging systems to make them suitable for complex surgical scenarios with high resolution and expanded versatility. Utility Model Content
[0016] To address the technical shortcomings of existing surgical microscope optical systems, such as edge field-of-view ray shearing, reduced edge resolution and image darkening, and reduced imaging range, the technical solution provided by this utility model is as follows:
[0017] A relay component for a surgical microscope includes:
[0018] The first set of relay mirrors is used to converge parallel light to a predetermined focal point;
[0019] A second set of relay lenses, coaxially arranged with the first set of relay lenses, is used for collimation after focusing.
[0020] Furthermore, a preferred embodiment is provided, wherein the first set of relay mirrors includes a first relay lens for converging parallel light to a predetermined focal point;
[0021] It also includes a second relay lens, which is cemented together with the first relay lens to form a first cemented doublet lens for correcting optical chromatic aberration.
[0022] Furthermore, a preferred embodiment is provided, wherein the first relay lens is a biconvex lens and the second relay lens is a meniscus lens.
[0023] Furthermore, a preferred embodiment is provided in which the second set of relay lenses includes a third relay lens for collimating the focused light rays;
[0024] It also includes a fourth relay lens, which is cemented together with the third relay lens to form a second cemented doublet lens for further correction of optical chromatic aberration.
[0025] Furthermore, a preferred embodiment is provided, wherein the third relay lens is a biconvex lens and the fourth relay lens is a meniscus lens.
[0026] Compared with the prior art, the advantages of the technical solution provided by this utility model are as follows:
[0027] By employing a symmetrical optical structure of "A+B+B+A", aberrations in the optical system are significantly reduced. This structural design optimizes the optical performance of the relay lens group, ensuring high-resolution imaging.
[0028] The double cemented lens design of the relay lens group achieves achromatic function in the microscope imaging system. The focal length ratio of cemented lens group one to cemented lens group two is 1:1, which balances the chromatic dispersion of light as it passes through the system. This design significantly improves the color reproduction capability of the image, especially in complex optical paths, where its performance is superior to traditional infinity systems.
[0029] The combination of a biconvex lens and a meniscus lens improves the edge resolution of the optical system. Compared to the traditional parallel optical path design, the combination of biconvex and meniscus lenses allows for more precise control of the propagation path of light rays at the edges, avoiding the problem of darkening at the edges. This improvement provides surgical microscopes with clearer edge imaging of the field of view.
[0030] By adjusting the focal length ratio of the relay lens group, the functions of the optical extender, beam splitter, and magnifier are integrated. Compared with single-function optical components, this multi-functional integrated design not only reduces system complexity but also improves the microscope's applicability in different surgical scenarios, providing more flexible expansion capabilities and higher optical performance stability.
[0031] Suitable for use in the design of surgical microscopes. Attached Figure Description
[0032] Figure 1 This is a schematic diagram of a relay lens group + extender prism system;
[0033] Figure 2 This is a schematic diagram of the connection structure;
[0034] Figure 3 This is a schematic diagram of a relay lens assembly used in a prism-free optical extender.
[0035] Figure 4 This is a schematic diagram showing the application of a relay mirror assembly to the beam splitter of an operating microscope, with an assistant mirror and a photographic system connected to the rear of the beam splitter.
[0036] In this diagram, 1 represents the exit pupil, 2 represents the extension lens, 3 represents the entrance pupil, 4 represents the first relay lens, 5 represents the second relay lens, 7 represents the third relay lens, 6 represents the fourth relay lens, 8 represents the lens clamp, 9 represents the lens barrel, 10 represents the spacer, 11 represents the lens clamp, and 12 represents the beam splitter. Detailed Implementation
[0037] 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:
[0038] Implementation Method 1: This implementation method provides a relay component for a surgical microscope, comprising:
[0039] The first set of relay mirrors is used to converge parallel light to a predetermined focal point;
[0040] A second set of relay lenses, coaxially arranged with the first set of relay lenses, is used for collimation after focusing.
[0041] Implementation Method 2: This implementation method further defines the relay assembly for a surgical microscope provided in Implementation Method 1. The first set of relay mirrors includes a first relay lens for converging parallel light to a predetermined focal point.
[0042] It also includes a second relay lens, which is cemented together with the first relay lens to form a first cemented doublet lens for correcting optical chromatic aberration.
[0043] Implementation Method 3: This implementation method further defines the relay component for a surgical microscope provided in Implementation Method 1, wherein the first relay lens is a biconvex lens and the second relay lens is a meniscus lens.
[0044] Implementation Method 4: This implementation method further defines the relay assembly for a surgical microscope provided in Implementation Method 1. The second set of relay mirrors includes a third relay lens for collimating the focused light rays.
[0045] It also includes a fourth relay lens, which is cemented together with the third relay lens to form a second cemented doublet lens for further correction of optical chromatic aberration.
[0046] Implementation Method 5: This implementation method further defines the relay component for a surgical microscope provided in Implementation Method 1, wherein the third relay lens is a biconvex lens and the fourth relay lens is a meniscus lens.
[0047] Implementation Method Six: This implementation method provides a relay system for a surgical microscope, including the components provided in Implementation Method One, wherein the first set of relay mirrors and the second set of relay mirrors are symmetrical structures.
[0048] It also includes a lens barrel 9 and a lens clip 8 for fixing the first and second relay lens groups.
[0049] Implementation Method Seven: This implementation method provides a relay component control method for an operating microscope, used to control the component provided in Implementation Method One, including:
[0050] The steps for correcting the optical chromatic aberration of parallel light signals;
[0051] The corrected optical signal is then extended or split.
[0052] The step of further correcting the optical chromatic aberration of the extended or split optical signal;
[0053] The step of achieving high-resolution control of optical imaging is achieved by using the ratio of the focal lengths of the first and second relay lens groups.
[0054] Specifically, it involves the propagation method of light signals, but not electronic control. That is, the magnification of optical imaging is changed by changing the ratio of the focal lengths of the first set of relay lenses and the second set of relay lenses.
[0055] Implementation Method 8: This implementation method provides a computer storage medium for storing a computing program. When the computer program is read by the computer, the computer executes the method provided in Implementation Method 7.
[0056] Implementation Method Nine: This implementation method provides a computer, including a processor and a storage medium. When the processor reads a computer program stored in the storage medium, the computer executes the method provided in Implementation Method Seven.
[0057] Implementation Method 10: This implementation method provides a computer program product. As a computer program, when the computer program is executed, it implements the method provided in Implementation Method 7.
[0058] Implementation Method Eleven: Combination Figure 1-4 This embodiment describes the technical solution provided above in further detail through specific examples. Specifically:
[0059] To overcome the problems of edge field-of-view ray clipping, reduced resolution, and narrowed imaging range that occur in existing surgical microscope optical systems after functional module expansion, this patent provides a relay system design. This embodiment achieves optical path compression and a comprehensive improvement in imaging quality through the rational design of the relay lens group and the application of a symmetrical optical structure.
[0060] Step 1: Optical Design of the Relay Lens Group
[0061] The optical parameters of the relay lens assembly are designed to ensure that they meet the requirements for achromatic correction and aberration reduction.
[0062] Detailed Description: The relay lens assembly consists of two sets of cemented doublet lenses, namely Relay Lens Set 1 and Relay Lens Set 2. Relay Lens Set 1 is composed of a biconvex lens (Relay Lens 1 4) and a meniscus lens (Relay Lens 2 5) cemented together; Relay Lens Set 2 is composed of a biconvex lens (Relay Lens 3 7) and a meniscus lens (Relay Lens 4 6) cemented together. The two sets of lenses are arranged in a symmetrical "A+B+B+A" structure, which effectively reduces aberrations in the light path. The focal length ratio of the cemented lenses is designed to be 1:1. This symmetrical optical structure balances chromatic aberration and ensures the stability of the imaging optical path.
[0063] Step 2: Structural Integration of the Relay Lens Assembly
[0064] By structurally integrating the relay lens group, a tight connection between optical system components can be ensured.
[0065] Detailed Description: The relay lens assembly is fixed inside the microscope tube 9 by lens clamps 8. Spacers 10 are used in the microscope tube 9 to separate the lenses, ensuring accurate relative positioning of the lenses. Lens clamps 11 are used to fix the lenses and ensure their stability in the optical path. The structure of the microscope tube 9 is seamlessly connected to the optical extender 2 or beam splitter 12 assembly of the surgical microscope, providing a reliable physical basis for the optical performance of the system.
[0066] Step 3: Functional Expansion of the Optical System
[0067] The relay lens assembly is applied to the optical extender 2 or beam splitter 12 of the surgical microscope to achieve multi-functional expansion.
[0068] Detailed Description: The application of the repeater lens group in the optical extender 2 effectively solves the problem of edge field-of-view cutoff caused by excessively long optical paths by compressing the optical path length. Simultaneously, this repeater lens group can be used in conjunction with the assistant lens or photographic system in the beam splitter 12 module to provide multi-angle observation views and high-definition image recording for surgical procedures. By adjusting the focal length ratio of cemented lens group one and cemented lens group two, a magnifier function can also be achieved, significantly increasing the magnification of the surgical microscope.
[0069] Step 4: System Optimization and Applicable Scenarios
[0070] Optimize the optical system design to expand the application scenarios of the relay system.
[0071] Detailed Description: The application of the relay lens assembly on the prism-less optical extender 2 further enhances system flexibility, providing an efficient solution for microscopes requiring simplified optical structures. The application of this relay system on the surgical microscope beam splitter 12 allows for easy connection of assistant lenses, magnifiers, and imaging systems to the rear end of beam splitter 12 while maintaining high resolution and optical stability. By adjusting optical parameters, it can adapt to the needs of different surgical scenarios, such as the high requirements for edge imaging quality in neurosurgery or the need for multifunctional expansion in ophthalmic surgery.
[0072] Step 5: Imaging Performance Verification and Effect Improvement
[0073] Verify the performance of the relay system in practical applications and analyze its comparative advantages with existing technologies.
[0074] Detailed Description: Through numerous experimental verifications, the relay system of this patent effectively reduces aberrations and chromatic aberration, significantly improving edge resolution and brightness. Compared to traditional infinity optical systems, microscopes using this patented relay lens assembly do not experience a reduction in imaging range after optical path expansion, and no obvious light shearing occurs at the edge of the field of view. In multifunctional expansion applications, the optical performance of this relay system surpasses that of traditional solutions.
[0075] In specific implementation work
[0076] The optical system achieves optical path compression and image quality improvement through a relay lens group. The relay lens group consists of two sets of cemented doublet lenses, namely Relay Lens Group One and Relay Lens Group Two. The two lens groups are arranged in a symmetrical "A+B+B+A" structure, effectively eliminating aberrations and improving the imaging resolution and brightness of the edge field of view.
[0077] First relay lens group
[0078] This includes relay lens 1 (4) and relay lens 2 (5).
[0079] The relay lens 4 is a biconvex lens, which is a spherical mirror with convex sides on both sides, used to converge parallel light to a certain focal point.
[0080] The relay lens 25 is a meniscus lens, which is a spherical mirror with one convex side and one concave side. It is used to correct aberrations in the optical system and assist in the further transmission of light.
[0081] The two are bonded together to form a doublet lens, which achieves chromatic aberration and ensures that the dispersion of light is controlled to a minimum.
[0082] Second relay lens group
[0083] This includes relay lens 3 (7) and relay lens 4 (6).
[0084] The shapes of relay lens 3 (7) and relay lens 4 (6) are similar to those of the first group. They are a biconvex lens and a meniscus lens, respectively. Their function is to collimate and correct aberrations after focusing the light path.
[0085] The two lenses are cemented together to form a second cemented doublet lens, ensuring imaging quality and optical stability in the relay system.
[0086] Symmetry of optical systems and light path transmission
[0087] The optical system, consisting of relay lens group one and relay lens group two, forms a symmetrical optical path structure of "A+B+B+A". This design significantly reduces the nonlinear aberrations of the optical system, enabling high-quality imaging.
[0088] Light enters from the exit pupil 1, converges through the first set of relay lenses, is transmitted through the optical extender 2 or other optical components, and finally exits to the entrance pupil 3 through the second set of relay lenses.
[0089] Physical connection and mechanical structure of optical structures
[0090] Method of fixing relay lens group
[0091] The relay lens is fixed inside the lens barrel 9 by the lens clamping plate 8 and the lens clamping ring 11, ensuring the stability and precise positioning of the lens in the optical path.
[0092] The lens barrel 9 uses a spacer ring 10 to separate the lenses, ensuring that the relative positions of the two relay lens groups are fixed, thereby ensuring the consistency of optical performance.
[0093] Splitter 12 Extended Structure
[0094] In the structure of beam splitter 12, after the light path passes through the first group of relay mirrors, the light can be split by beam splitter 12 to realize the extended functions of assistant mirror, photographic system or magnifier.
[0095] The second set of relay lenses is located behind beam splitter 12 to further focus the light and correct aberrations, ensuring that the imaging quality of the extended equipment is consistent with the main field of view.
[0096] The optical system parameters are as follows:
[0097]
[0098] The above description of the technical solution provided by this utility model through several specific embodiments is intended to highlight the advantages and benefits of the technical solution provided by this utility model. However, the above-described specific embodiments are not intended to limit this utility model. Any reasonable modifications and improvements to this utility model, combinations of embodiments, and equivalent substitutions based on the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A relay assembly for a surgical microscope, characterized in that, include: The first set of relay mirrors is used to converge parallel light to a predetermined focal point; A second set of relay lenses, coaxially arranged with the first set of relay lenses, is used for collimation after focusing; The first set of relay lenses is composed of a biconvex lens and a meniscus lens cemented together. The second set of relay lenses is composed of a meniscus lens and a biconvex lens cemented together. The first and second relay lens groups are arranged in a symmetrical "A+B+B+A" structure, with a focal length ratio of 1:1 between them.
2. A relay assembly for a surgical microscope according to claim 1, characterized in that, The first set of relay lenses includes a first relay lens for converging parallel light to a predetermined focal point; It also includes a second relay lens, which is cemented together with the first relay lens to form a first cemented doublet lens for correcting optical chromatic aberration.
3. A relay assembly for a surgical microscope according to claim 2, characterized in that, The first relay lens is a biconvex lens, and the second relay lens is a meniscus lens.
4. A relay assembly for a surgical microscope according to claim 1, characterized in that, The second set of relay lenses includes a third relay lens for collimating the focused light rays; It also includes a fourth relay lens, which is cemented together with the third relay lens to form a second cemented doublet lens for further correction of optical chromatic aberration.
5. A relay assembly for a surgical microscope according to claim 4, characterized in that, The third relay lens is a biconvex lens, and the fourth relay lens is a meniscus lens.
6. A relay system for a surgical microscope, characterized in that, The system includes the components described in claim 1, wherein the first set of relay mirrors and the second set of relay mirrors are symmetrical structures.