Illuminating lens assembly and lens of operating microscope

Abstract

An illumination lens of an operating microscope relates to the technical field of microscope illumination. In order to solve the technical defects that the lighting system of the existing operating microscope in the prior art is insufficient in uniformity, flexibility, operability and the like, the technical scheme provided by the utility model is as follows: the lighting lens assembly of the operating microscope comprises a collimating lens group used for collimating divergent light into parallel light; the variable diaphragm is arranged on an emergent light path of the collimating lens group and is used for adjusting the diameter of the parallel light; and the projection lens group is used for projecting the parallel light to an object plane. The collimating lens group comprises a first collimating lens of a plano-convex structure, a second collimating lens of a biconvex structure and a third collimating lens of a meniscus structure. The projection lens group comprises a biconcave structure projection lens I, a biconvex structure projection lens II and a meniscus structure projection lens III; and the reflecting mirror is arranged between the projection lens II and the projection lens III. The illumination device is suitable for illumination of the operating microscope.

Description

Technical Field

[0001] This relates to the field of microscope illumination technology, specifically to illumination lenses for surgical microscopes. Background Technology

[0002] In modern surgical medicine, the continuous advancement of microsurgical techniques has placed higher demands on the performance of surgical microscopes. As an indispensable tool in delicate surgeries, the quality of the optical system of a surgical microscope directly affects the outcome and precision of the surgery. Especially in fields such as neurosurgery, ophthalmology, and otolaryngology, the illumination quality of the microscope is crucial; it must provide a uniform light spot so that surgeons can clearly observe the fine structures of the surgical site.

[0003] Currently, surgical microscope illumination systems primarily rely on optical fibers, using multiple lenses and mirror assemblies to collimate and focus the light beam. However, existing surgical microscope illumination systems suffer from several common problems: First, the uniformity of the illumination spot is poor, often resulting in a bright center and dark edges, affecting the surgeon's accurate judgment of the surgical area. Second, the spot size adjustment is not flexible enough, frequently requiring manual filter replacement or lens adjustment, which is complex and difficult to meet real-time adjustment needs. Furthermore, because different surgical scenarios require different spot sizes, existing equipment often lacks precision and continuity in spot size adjustment, making it difficult to adapt to complex and changing surgical environments.

[0004] For example, some surgical microscopes use fixed apertures to control the shape and size of the light spot, but this method lacks flexibility and the adjustment precision of the light spot size is low, making it difficult to adapt to the specific lighting requirements of different types of surgery. Other microscopes rely on complex combinations of optical components, but such structures often result in a large system size, difficulty in adjustment, and even increased risks introduced during surgery due to inconvenient equipment operation.

[0005] In summary, existing surgical microscope illumination systems are inadequate in terms of uniformity, flexibility, and ease of operation. There is an urgent need for a new optical solution that can provide uniform illumination and has an adjustable spot size to meet the needs of surgeons in different surgical scenarios and improve the precision and safety of surgery. Utility Model Content

[0006] To address the shortcomings of existing surgical microscope illumination systems in terms of uniformity, flexibility, and ease of operation, the present invention provides the following technical solution:

[0007] An illumination lens assembly for a surgical microscope, comprising:

[0008] Collimating lens group is used to collimate divergent light into parallel light;

[0009] A variable aperture is disposed in the output light path of the collimating lens group to adjust the diameter of the parallel light;

[0010] A projection lens group is used to project the parallel light onto the object surface.

[0011] Furthermore, a preferred embodiment is provided, wherein the collimating lens group comprises:

[0012] Plano-convex collimating lens 1, biconvex collimating lens 2, and meniscus collimating lens 3.

[0013] Furthermore, a preferred embodiment is provided, wherein the projection lens group includes:

[0014] Biconcave projection lens 1, biconvex projection lens 2, and meniscus projection lens 3;

[0015] And a reflector disposed between the second and third projection lenses.

[0016] Furthermore, a preferred embodiment is provided, which also includes a lens barrel, in which the collimating lens group is disposed.

[0017] Furthermore, a preferred embodiment is provided in which the diverging light is provided through an optical fiber emitting end face.

[0018] Based on the same inventive concept, this utility model also provides an illumination lens for a surgical microscope, comprising:

[0019] The aforementioned components, and a motor, wherein the motor drives the variable aperture via gears and a ring gear.

[0020] Based on the same inventive concept, this utility model also provides a method for controlling the illumination lens of a surgical microscope, the method being used to control the lens, comprising:

[0021] The step of sending a variable aperture drive signal according to preset parameters;

[0022] Steps for acquiring images of light spots on an object surface;

[0023] The step of adjusting the preset parameters based on the uniformity judgment result of the object surface spot image.

[0024] Based on the same inventive concept, this utility model also provides a computer storage medium for storing a computing program, which, when read by the computer, executes the method described thereon.

[0025] Based on the same inventive concept, this utility model also provides a computer, including a processor and a storage medium, wherein when the processor reads a computer program stored in the storage medium, the computer executes the method described thereon.

[0026] Based on the same inventive concept, this utility model also provides a computer program product, which, when executed, implements the method described.

[0027] Compared with the prior art, the advantages of the technical solution provided by this utility model are as follows:

[0028] By designing a collimating lens group, the collimation of the diverging light emitted from the optical fiber is achieved, forming uniform parallel light. This design significantly improves the uniformity of the light spot, ensuring consistent brightness across the entire field of view and avoiding the problem of a bright center and dark edges. Compared to existing illumination methods, this uniformity significantly improves the clarity of observation of the surgical site during surgery and reduces the risk of misjudgment caused by uneven light spots.

[0029] By employing a motor-driven variable aperture design, the spot size can be adjusted in real time. Compared to existing methods that rely on manually changing filters or adjusting lenses, this automated adjustment method greatly improves the convenience of operation and the flexibility of spot size adjustment. Surgeons can adjust the spot size in real time according to the needs of the surgery, thereby better adapting to the requirements of different surgical scenarios and improving the precision and efficiency of the surgery.

[0030] The combination of the projection lens group and the reflector optimizes the projection effect of the variable aperture, accurately projecting a uniform surface light source onto the object surface. This combination not only ensures the uniformity of the light spot but also maintains the conjugate relationship between the light spot size and the object surface, ensuring synchronous changes in the light spot on the object surface when the aperture is adjusted. Compared to traditional fixed apertures or complex optical structures, this design provides high-quality illumination while maintaining the system's compactness and ease of operation, reducing potential risks during surgery caused by inconvenient equipment operation.

[0031] Suitable for use in illumination work under surgical microscopes. Attached Figure Description

[0032] Figure 1 A schematic diagram of the illumination lens assembly of a surgical microscope;

[0033] Figure 2 This is a schematic cross-sectional view of the illumination lens of a surgical microscope.

[0034] Figure 3 A three-dimensional schematic diagram of the illumination lens of a surgical microscope;

[0035] Figure 4 This is a diagram illustrating the test results.

[0036] Wherein, 0 is the fiber optic transmitting end face, 1 is collimating lens one, 2 is collimating lens two, 3 is collimating lens three, 4 is projection lens one, 5 is projection lens two, 6 is a reflector, 7 is projection lens three, 8 is an optical fiber, 9 is a lens barrel, 10 is a variable aperture, 11 is a reflector support, 12 is a motor, 13 is a gear ring, and 14 is a gear. 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: Combination Figure 1-4 This embodiment describes an illumination lens assembly for a surgical microscope, comprising:

[0039] Collimating lens group is used to collimate divergent light into parallel light;

[0040] A variable aperture 10 is disposed in the output light path of the collimating lens group to adjust the diameter of the parallel light.

[0041] A projection lens group is used to project the parallel light onto the object surface.

[0042] Specifically:

[0043] include:

[0044] Fiber optic transmitter end face 0:

[0045] This is the starting point of the entire lighting system. The fiber optic transmitter is used to emit light from the fiber, and the beam is divergent. The light emitted from the fiber will be collimated and projected by subsequent optical components.

[0046] Collimating lens group:

[0047] Collimating lens 1, collimating lens 2, and collimating lens 3 together form a collimating lens group. The purpose of this lens group is to convert the diverging light from the end face of the optical fiber into a uniform parallel beam.

[0048] The lenses are roughly convex lenses, arranged in sequence to ensure that the light beam can be effectively collimated after passing through the lens group, thereby improving the uniformity of the light.

[0049] Projection lens group:

[0050] Projection lens 4 and projection lens 5, along with the subsequent reflector 6 and projection lens 7, together form the projection lens group.

[0051] The purpose of a projection lens is to project a beam of light from a variable aperture onto the surgical site, so that the light spot has high uniformity and appropriate size.

[0052] The reflector 6 is located in the middle of the system and is set at an angle to change the direction of light propagation, which can effectively reduce the length of the lens.

[0053] Aperture and beam adjustment device:

[0054] Variable stop 10: The variable stop is used to control the size of the passing light beam. The size of the stop can be adjusted by an external drive device.

[0055] Motor 12: The motor is used to drive the opening size of the variable aperture, which can adjust the size of the light spot in real time to adapt to different surgical needs.

[0056] Gear ring 13 and gear 14: The gear and gear ring structure is used for transmission, converting the rotation of the motor into adjustment of the aperture, ensuring that the opening and closing of the aperture can be precisely controlled.

[0057] Lens tube 9:

[0058] The lens barrel serves to fix and protect the optical components, ensuring that each optical component can be stably held in its predetermined position.

[0059] Mirror bracket 11:

[0060] Used to fix the reflector 6, ensuring that the beam can propagate along the designed optical path and avoid beam deviation caused by vibration or external force.

[0061] Fiber optic 8:

[0062] Used to connect to an external light source, bringing light into the system. The input end of the optical fiber is connected to the transmitting end face 0 of the optical fiber, ensuring that the light can stably enter the collimating lens group for processing.

[0063] The collimating lens group is used to collimate the diverging light from the emitting end face of the optical fiber into a uniform parallel beam, reducing the brightness of the center and darkness of the light spot. The motor 12 is interconnected with the gear ring 13 and gear 14, and the light spot size can be adjusted in real time by adjusting the opening of the aperture. The reflector 6 in the projection lens group is used to change the propagation direction of the beam, so that the beam can reach the object surface more accurately. The variable aperture has a conjugate relationship with the object surface, ensuring that the light spot size changes synchronously with the adjustment of the aperture. The lens barrel 9 is used to fix and protect the collimating lens group, variable aperture, and projection lens group, ensuring the stability of the optical components during surgery. The optical fiber 8 is used to introduce an external light source into the illumination lens system. The reflector bracket 11 is used to fix the reflector 6 to prevent optical path deviation due to vibration or external force.

[0064] Figure 4This is a schematic diagram of the test results for the uniformity of the light spot on the object surface.

[0065] Implementation Method Two: This implementation method further defines the illumination lens assembly of a surgical microscope provided in Implementation Method One. The collimating lens group includes:

[0066] Plano-convex collimating lens 1, biconvex collimating lens 2, and meniscus collimating lens 3.

[0067] Implementation Method 3: This implementation method further defines the illumination lens assembly of a surgical microscope provided in Implementation Method 1. The projection lens group includes:

[0068] 4. Biconcave projection lens 1, 5. Biconvex projection lens 2, and 7. Meniscus projection lens 3;

[0069] And a reflector 6 disposed between the second projection lens 5 and the third projection lens 7.

[0070] Implementation Method 4: This implementation method further defines the illumination lens assembly of a surgical microscope provided in Implementation Method 1, and also includes a microscope tube 9, in which the collimating lens group is disposed.

[0071] Implementation Method 5: This implementation method further defines the illumination lens assembly of a surgical microscope provided in Implementation Method 1, wherein the diverging light is provided through an optical fiber emitting end face 0.

[0072] Implementation Method Six: This implementation method provides an illumination lens for a surgical microscope, comprising:

[0073] The components provided in Embodiment 1 include a motor 12, which drives the variable aperture 10 via a gear 14 and a gear ring 13.

[0074] Embodiment Seven: This embodiment provides a method for controlling the illumination lens of a surgical microscope. The method controls the lens provided in Embodiment Six, and includes:

[0075] The step of sending a drive signal for the variable aperture 10 according to preset parameters;

[0076] Steps for acquiring images of light spots on an object surface;

[0077] The step of adjusting the preset parameters based on the size determination result of the object surface spot image.

[0078] In practice, the operational methods include:

[0079] Step 1: Alignment of the fiber optic transmitter end face

[0080] First, the fiber optic transmitting end face 0 is set as the light source, and the diverging light emitted from it is collimated by a collimating lens group. The collimating lens group includes collimating lens 1, collimating lens 2, and collimating lens 3. After passing through the collimating lens group, the diverging fiber light is collimated into a uniform parallel beam, significantly improving the beam uniformity and providing a stable and high-quality light source input for subsequent steps.

[0081] Step 2: Adjusting the size of the light spot

[0082] After passing through the collimating lens group, the parallel beam continues to pass through the variable aperture 10. The size of the variable aperture 10 is adjusted by the motor 12, and the change in the aperture directly affects the size of the beam passing through it. The adjustment of the aperture is achieved through the transmission structure of gear 14 and gear ring 13. Adjusting the size of the aperture can change the diameter of the beam entering the projection system, thereby controlling the size of the light spot on the final object surface. In this way, the light spot size can be flexibly adjusted according to surgical needs, providing suitable illumination conditions for different surgical scenarios.

[0083] Step 3: Projection and Focusing of the Beam

[0084] The light beam, after passing through the variable aperture, enters the projection lens group, including projection lens 4, projection lens 5, reflector 6, and projection lens 7. These lenses, combined with the reflector, form a projection lens that treats the variable aperture as a uniform surface light source and projects it precisely onto the object surface. Guided by the reflector and focused by the multi-stage lenses, a relatively uniform light spot is ultimately formed, covering the entire surgical area and ensuring consistent illumination quality.

[0085] Step 4: Synchronous Adjustment of Light Spot

[0086] Due to the structural relationship between the projection lens group and the reflecting mirror, there is a conjugate relationship between the variable aperture and the object surface spot. When the aperture size changes, the size of the object surface spot also changes synchronously, ensuring that the surgeon can adjust the spot size in real time according to the surgical situation, improving surgical precision and operational flexibility. Compared with existing technologies, this synchronous adjustment method of spot size not only improves the convenience of adjustment but also ensures the uniformity and coverage of the spot.

[0087] Implementation Method 8: This implementation method provides a computer storage medium for storing a computing program. When the computer reads the computer program, the computer executes the method provided in Implementation Method 7.

[0088] 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.

[0089] 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.

[0090] 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. An illumination lens assembly for a surgical microscope, characterized in that, include: Collimating lens group is used to collimate divergent light into parallel light; A variable aperture is disposed in the output light path of the collimating lens group to adjust the diameter of the parallel light; A projection lens group for projecting the illuminated variable aperture onto the object surface.

2. The illumination lens assembly of a surgical microscope according to claim 1, characterized in that, The collimating lens group includes: Hemispherical collimating lens 1, biconvex collimating lens 2, and meniscus collimating lens 3.

3. The illumination lens assembly of a surgical microscope according to claim 1, characterized in that, The projection lens group includes: Biconcave projection lens 1, biconvex projection lens 2, and meniscus projection lens 3; And a reflector disposed between the second and third projection lenses.

4. The illumination lens assembly of a surgical microscope according to claim 1, characterized in that, It also includes a lens barrel, in which the collimating lens group is disposed.

5. The illumination lens assembly of a surgical microscope according to claim 1, characterized in that, The divergent light is provided through the optical fiber transmitting end face.

6. An illumination lens for a surgical microscope, characterized in that, include: The component of claim 1, and the motor, wherein the motor drives the variable aperture via gears and a ring gear.

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