A double light path continuous zoom device of a surgical microscope

Abstract

The application provides a surgical microscope double optical path continuous zoom device, comprising: a first adjusting part for driving a zoom lens barrel contained in a zoom lens group to displace in a radial direction, a first elastic positioning part abutting against an opposite side of the zoom lens barrel relative to the first adjusting part and forming a radial elastic force on the zoom lens barrel to adjust an optical axis of a zoom lens contained in the zoom lens barrel to coincide with an optical axis of a second lens contained in a second lens group; a second adjusting part for driving a compensation lens barrel contained in a compensation lens group to displace in a radial direction, a second elastic positioning part abutting against an opposite side of the compensation lens barrel relative to the second adjusting part and forming a radial elastic force on the compensation lens barrel to adjust an optical axis of a compensation lens contained in the compensation lens barrel to coincide with the optical axis of the second lens. The surgical microscope double optical path continuous zoom device disclosed in the application realizes the improvement of the adjustment efficiency of the zoom lens and the compensation lens, ensures the high-precision centering of the optical axes and the long-term stability.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a dual-path continuous zoom device for a surgical microscope. Background Technology

[0002] In microsurgery, surgical microscopes need to have continuous zoom capabilities, allowing for stepless adjustment of magnification by changing the axial position of optical elements. Traditional zoom systems typically employ mechanical linkage mechanisms or electronic servo control to achieve synchronized movement between the zoom lens group and the compensation lens group.

[0003] However, in the existing zoom systems, the lens barrel needs to be repeatedly disassembled and reassembled to calibrate the optical axis of the zoom lens and the compensation lens separately during the optical axis alignment process. The assembly and adjustment process is complicated, and the zoom lens and the compensation lens are prone to optical axis misalignment, making it difficult to maintain long-term optical axis stability and affecting the imaging effect.

[0004] It should be noted that the above description of the background technology is only for the purpose of providing a clear and complete explanation of the technical solutions of this application and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background technology section of this application. Summary of the Invention

[0005] The purpose of this invention is to disclose a dual-optical-path continuous zoom device for surgical microscopes, which solves many defects in existing zoom systems, especially to improve the assembly and adjustment efficiency of zoom lenses and compensation lenses, and to ensure high-precision alignment and long-term stability of the optical axis.

[0006] To achieve the above objectives, the present invention provides a dual-optical-path continuous zoom device for a surgical microscope, comprising: an optical path assembly, a support assembly, a guide assembly, and a centering adjustment assembly. The optical path assembly comprises: a first lens group, a zoom lens group, a compensation lens group, and a second lens group arranged sequentially along the optical axis from the object side. The support assembly is used to maintain a constant axial distance between the first lens group and the second lens group and to ensure that the optical axis of the first lens group coincides with the optical axis of the second lens group. The guide assembly is used to adjust the axial distance between the zoom lens group and the compensation lens group; Both the zoom lens group and the compensation lens group are equipped with the centering adjustment component, which includes an adjustment element and an elastic positioning element. A first adjusting member disposed in the zoom lens group is used to drive the zoom lens barrel included in the zoom lens group to move radially. A first elastic positioning member disposed in the zoom lens group abuts against the opposite side of the zoom lens barrel relative to the first adjusting member and forms a radial elastic force on the zoom lens barrel to adjust the optical axis of the zoom lens included in the zoom lens barrel to coincide with the optical axis of the second lens included in the second lens group. The second adjusting member configured in the compensating lens assembly is used to drive the compensating lens barrel included in the compensating lens assembly to move radially. The second elastic positioning member configured in the compensating lens assembly abuts against the side of the compensating lens barrel opposite to the second adjusting member and forms a radial elastic force on the compensating lens barrel to adjust the optical axis of the compensating lens included in the compensating lens barrel to coincide with the optical axis of the second lens.

[0007] As a further improvement of the present invention, the zoom lens assembly includes: a zoom lens mount, wherein the zoom lens mount has a first positioning groove for centering and adjusting the zoom lens barrel; The first adjusting member extends radially through the zoom lens mount and partially into the first positioning groove, with one end of the first adjusting member extending into the first positioning groove abutting against the zoom lens barrel. The compensating lens assembly includes: a compensating lens mount, wherein the compensating lens mount has a second positioning groove for centering and adjusting the compensating lens barrel; The second adjusting member extends radially through the compensating lens mount and partially into the second positioning groove, with one end of the second adjusting member extending into the second positioning groove abutting against the compensating lens barrel.

[0008] As a further improvement of the present invention, a first limiting groove is formed in the groove wall of the first positioning groove, and a third limiting groove is formed in the circumferential direction of the outer wall of the zoom lens barrel, which corresponds to the first limiting groove in the radial direction. The first elastic positioning member is embedded in the first limiting groove. The first elastic positioning member is constructed to form a first arc-shaped inner wall that makes point-line contact with the third limiting groove, so as to form a radial elastic clamping of the zoom lens barrel. One end of the first adjusting member extending into the first positioning groove abuts against the third limiting groove. The second positioning groove is formed by opening a second limiting groove in the groove wall, and the outer wall of the compensation lens tube is recessed in the circumferential direction to form a fourth limiting groove that corresponds to the second limiting groove in the radial direction. The second elastic positioning member is embedded in the second limiting groove. The second elastic positioning member is constructed to form a second arc-shaped inner wall that makes point-line contact with the fourth limiting groove, so as to form a radial elastic clamping on the compensating lens barrel. One end of the second adjusting member extending into the second positioning groove abuts against the fourth limiting groove.

[0009] As a further improvement of the present invention, the support assembly includes: a mounting base for configuring the second lens group, two columns configured on the mounting base and disposed opposite to each other on both sides of the second lens group, the length direction of the columns being parallel to the optical axis, and the two ends of the columns along their length direction being respectively connected to the mounting base and the bridging base for configuring the first lens group, so as to maintain a constant axial distance between the first lens group and the second lens group.

[0010] As a further improvement of the present invention, the first lens group includes: a first lens barrel, and a first lens disposed within the first lens barrel; The bridging seat has a groove that forms a accommodating portion of the first lens barrel, and the first lens barrel is adjustable along the horizontal plane of the groove.

[0011] As a further improvement of the present invention, the guiding assembly includes: a rotating cylinder rotatably connected to the mounting base, the cylinder wall of which is configured with a zoom guide portion and a compensation guide portion; a first sliding seat that equips the zoom lens mount and slides along the column; a second sliding seat that equips the compensation lens mount and slides along another column; a first guide member disposed outside the first sliding seat and guided by the zoom guide portion to move axially; and a second guide member disposed outside the second sliding seat and guided by the compensation guide portion to move axially.

[0012] As a further improvement of the present invention, the variable magnification guide is configured as a first helical surface arranged in a spiral shape along the axial direction around the side wall of the rotating cylinder, and the first guide member is in rolling contact with the first helical surface; The compensation guide is configured as a second helical surface arranged in a helical shape along the axial direction around the side wall of the rotating cylinder, and the second guide makes rolling contact with the second helical surface; When the rotating cylinder rotates relative to the mounting base, the zoom lens mount and the compensation lens mount simultaneously move along the optical axis.

[0013] As a further improvement of the present invention, the guiding component further includes: a first connecting piece disposed on the first sliding seat, a first elastic member disposed on the first connecting piece extending through both ends of the first sliding seat, a second connecting piece disposed on the second sliding seat, and a second elastic member disposed on the second connecting piece extending through both ends of the second sliding seat; The first elastic element is connected to the first connecting piece and the mounting base at both ends along its length, and the second elastic element is connected to the second connecting piece and the mounting base at both ends along its length.

[0014] As a further improvement of the present invention, a first guide portion is constructed on the side of the zoom lens mount near the second sliding seat, and the first guide portion fits against the outer peripheral contour of the column portion and forms a sliding contact with the column. The compensation mirror mount has a second guide portion constructed on the side near the first sliding seat. The second guide portion fits against the outer periphery of the column portion and forms a sliding contact with the column.

[0015] As a further improvement of the present invention, the surgical microscope dual-path continuous zoom device further includes a drive unit for driving the rotating cylinder to rotate relative to the mounting base.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The first adjusting member drives the zoom lens barrel to move radially to correct the optical axis offset of the zoom lens until the optical axis of the zoom lens coincides with the optical axis of the second lens. The first adjusting member generates an active driving force on the zoom lens barrel, while the first elastic positioning member generates a reverse elastic force on the zoom lens barrel opposite to that of the first adjusting member. This creates a bidirectional force balance between the first adjusting member and the first elastic positioning member on the zoom lens barrel, thereby maintaining the positional stability of the zoom lens barrel after adjustment through the cooperation of the first adjusting member and the first elastic positioning member, preventing optical axis offset, and ensuring the accuracy and long-term stability of the alignment between the optical axis of the zoom lens and the optical axis of the second lens group. The second adjusting member drives the compensation lens barrel to move radially to correct the optical axis offset of the compensation lens. Until the optical axis of the compensation lens coincides with the optical axis of the second lens, the second adjusting member generates an active driving force on the compensation lens barrel, and the second elastic positioning member generates a reverse elastic force on the compensation lens barrel opposite to that of the second adjusting member. This creates a bidirectional force balance on the compensation lens barrel by the second adjusting member and the second elastic positioning member, so that the second adjusting member and the second elastic positioning member work together to maintain the positional stability of the compensation lens barrel after adjustment, prevent optical axis deviation, and ensure the accuracy and long-term stability of the optical axis of the compensation lens coinciding with the optical axis of the second lens group. This achieves coaxiality of the first lens group, zoom lens group, compensation lens group and second lens group, ensuring stable imaging quality during zooming, and completing optical axis calibration without disassembling optical components, shortening the assembly and adjustment time and improving the assembly and adjustment efficiency of the zoom lens and compensation lens. Attached Figure Description

[0017] Figure 1 This is an overall schematic diagram of the dual-optical-path continuous zoom device for surgical microscopes disclosed in this invention; Figure 2 This is a schematic diagram of the axial cross-section of the dual-optical-path continuous zoom device for a surgical microscope. Figure 3 This is a schematic diagram showing how the first sliding seat and the second sliding seat are connected to the first column and the second column, respectively. Figure 4is a schematic view of the optical path of the first lens group, the zoom lens group, the compensation lens group and the second lens group; Figure 5 is a schematic view of the connection between the mounting base and the rotating cylinder; Figure 6 is a schematic view of the connection between the compensation lens holder and the second sliding holder; Figure 7 is a schematic view of the connection between the zoom lens holder and the first sliding holder; Figure 8 is a radial cross-sectional schematic view of the second adjusting member abutting against the compensation lens barrel; Figure 9 is a radial cross-sectional schematic view of the first adjusting member abutting against the zoom lens barrel. Detailed Description of Embodiments

[0018] The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not intended to limit the present invention, and any equivalent changes or substitutions in functions, methods or structures made by those skilled in the art based on these embodiments shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1 to 9 discloses a specific embodiment of a dual-optical path continuous zoom device for a surgical microscope.

[0020] The dual-optical path continuous zoom device 100 for a surgical microscope disclosed in the present application adopts dual imaging optical paths, which are an imaging optical path P1 and an imaging optical path P2 respectively. A first lens group 11, a zoom lens group 12, a compensation lens group 13 and a second lens group 14 are arranged in both the imaging optical path P1 and the imaging optical path P2. The first lens group 11, the zoom lens group 12, the compensation lens group 13 and the second lens group 14 in the imaging optical path P1 are arranged along the optical axis Z1, and the first lens group 11, the zoom lens group 12, the compensation lens group 13 and the second lens group 14 in the imaging optical path P2 are arranged along the optical axis Z2.

[0021] It should be noted that in the embodiments of the present application, the term "axial direction" refers to a direction parallel to the optical axis Z1 / Z2. The term "radial direction" refers to any direction in a plane perpendicular to the optical axis Z1 / Z2. In the Figures 1 to 4 viewing angle shown, as shown in Figure 4 , the direction where the measured object W is located is the object side, and the direction opposite to the measured object W is the image side.

[0022] Referring to Figures 1 to 7 , in this embodiment, the dual-optical path continuous zoom device 100 for a surgical microscope includes: an optical path assembly 10, a support assembly 20, a guide assembly 30 and an alignment adjustment assembly 40.

[0023] The optical path assembly 10 comprises: a first lens group 11, a zoom lens group 12, a compensation lens group 13 and a second lens group 14 which are sequentially arranged coaxially from the object side; the support assembly 20 is configured to keep the axial distance between the first lens group 11 and the second lens group 14 constant and keep the optical axis of the first lens group 11 coincident with the optical axis of the second lens group 14; the guide assembly 30 is configured to adjust the axial distance between the zoom lens group 12 and the compensation lens group 13.

[0024] The relative position of the first lens group 11 and the second lens group 14 is fixed by the support assembly 20, the axial distance between the first lens group 11 and the second lens group 14 is kept constant, and the optical axis of the first lens group 11 is ensured to be coincident with the optical axis of the second lens group 14.

[0025] The guide assembly 30 is disposed on the support assembly 20, and is configured to simultaneously guide the compensation lens group 13 to displace along the optical axis relative to the second lens group 14 and the zoom lens group 12 to displace along the optical axis relative to the first lens group 11. The axial movement of the zoom lens group 12 and the compensation lens group 13 is simultaneously controlled by the guide assembly 30, so as to adjust the axial distance between the zoom lens group 12 and the compensation lens group 13. Stepless continuous zooming is implemented by the zoom lens group 12, so that the magnification is adjusted to adapt to different observation requirements, and aberration is corrected by the compensation lens group 13 to ensure a clear image plane. The first lens group 11 receives light from the object side, the light passes through the zoom lens group 12 and the compensation lens group 13 and then enters the second lens group 14, and parallel light is output through the second lens group 14. The dual optical path continuous zoom device 100 for a surgical microscope is coupled with an imaging module (not shown) to form a final clear image.

[0026] Both the zoom lens group 12 and the compensation lens group 13 are provided with centering adjustment assemblies 40, and the centering adjustment assembly 40 comprises an adjusting member 41 and an elastic positioning member 42; the adjusting member 41 comprises a first adjusting member 411 and a second adjusting member 412, and the elastic positioning member 42 comprises a first elastic positioning member 421 and a second elastic positioning member 422.

[0027] Referring Figure 2 to Figure 3 and Figure 7 as shown, a zoom lens 124 is arranged in a zoom lens barrel 121. The first adjusting member 411 disposed on the zoom lens group 12 is configured to drive the zoom lens barrel 121 included in the zoom lens group 12 to displace in a radial direction, and the first elastic positioning member 421 disposed on the zoom lens group 12 abuts against the opposite side of the zoom lens barrel 121 relative to the first adjusting member 411, and applies a radial elastic acting force to the zoom lens barrel 121, so as to adjust the optical axis of the zoom lens 124 included in the zoom lens barrel 121 to be coincident with the optical axis of the second lens 142 included in the second lens group 14.

[0028] The first adjusting member 411 drives the zoom lens barrel 121 to move in the radial direction to correct the optical axis offset of the zoom lens 124, and the first adjusting member 411 is locked after the optical axis of the zoom lens 124 coincides with the optical axis of the second lens 142. During the optical axis centering adjustment process, the first elastic positioning member 421 deforms under the extrusion of the zoom lens barrel 121 to store elastic potential energy and apply an elastic acting force (hereinafter referred to as "elastic force") to the zoom lens barrel 121. After the adjustment is completed, the first elastic positioning member 421 releases the elastic potential energy, applies an elastic force to the zoom lens barrel 121 in the radial direction, and balances with the radial locking force of the first adjusting member 411, so that the zoom lens barrel 121 is stabilized at the adjusted position (i.e., the position where the optical axis of the zoom lens 124 coincides with the optical axis of the second lens 142), thereby maintaining the coincidence between the optical axis of the zoom lens 124 and the optical axis of the second lens 142.

[0029] Refer to Figure 2 and Figure 3 and Figure 6 , as shown, a compensation lens 134 is arranged in the compensation lens barrel 131. The second adjusting member 412 disposed on the compensation lens group 13 is configured to drive the compensation lens barrel 131 included in the compensation lens group 13 to displace in the radial direction, and the second elastic positioning member 422 disposed on the compensation lens group 13 abuts against the opposite side of the compensation lens barrel 131 relative to the second adjusting member 412, so as to form a radial elastic acting force on the compensation lens barrel 131, thereby adjusting the optical axis of the compensation lens 134 included in the compensation lens barrel 131 to coincide with the optical axis of the second lens 142 included in the second lens group 14.

[0030] The second adjusting member 412 drives the compensation lens barrel 131 to move in the radial direction to correct the optical axis offset of the compensation lens 134, and the second adjusting member 412 is locked after the optical axis of the compensation lens 134 coincides with the optical axis of the second lens 142. During the optical axis centering adjustment process, the second elastic positioning member 422 deforms under the extrusion of the compensation lens barrel 131 to store elastic potential energy and apply an elastic force to the compensation lens barrel 131. After the adjustment is completed, the second elastic positioning member 422 releases the elastic potential energy, applies an elastic force to the compensation lens barrel 131 in the radial direction, and balances with the radial locking force of the second adjusting member 412, so that the compensation lens barrel 131 is stabilized at the adjusted position (i.e., the position where the optical axis of the compensation lens 134 coincides with the optical axis of the second lens 142), thereby maintaining the coincidence between the optical axis of the compensation lens 134 and the optical axis of the second lens 142.

[0031] The surgical microscope dual-path continuous zoom device 100 disclosed in this application generates an active driving force on the zoom lens barrel 121 through a first adjusting member 411, and a first elastic positioning member 421 generates a reverse elastic force on the zoom lens barrel 121 opposite to that of the first adjusting member 411. This creates a bidirectional force balance between the first adjusting member 411 and the first elastic positioning member 421 on the zoom lens barrel 121, thereby maintaining the positional stability of the zoom lens barrel 121 after adjustment through the cooperation of the first adjusting member 411 and the first elastic positioning member 421, preventing optical axis misalignment, and ensuring the accuracy and long-term stability of the optical axis of the zoom lens 124 coinciding with the optical axis of the second lens group 14. The second adjusting member 412 generates an active driving force on the compensation lens barrel 131, and the second elastic positioning member 422... A reverse elastic force opposite to that of the second adjusting member 412 is formed on the compensation lens barrel 131, thereby creating a bidirectional force balance between the second adjusting member 412 and the second elastic positioning member 422 on the compensation lens barrel 131. This allows the second adjusting member 412 and the second elastic positioning member 422 to work together to maintain the positional stability of the compensation lens barrel 131 after adjustment, preventing optical axis deviation and ensuring the accuracy and long-term stability of the optical axis of the compensation lens 134 coinciding with the optical axis of the second lens group 14. This achieves coaxiality of the first lens group 11, the zoom lens group 12, the compensation lens group 13, and the second lens group 14, ensuring stable imaging quality during zooming. Furthermore, optical axis calibration can be completed without disassembling optical components, shortening the setup and adjustment time and improving the setup and adjustment efficiency of the zoom lens 124 and the compensation lens 134.

[0032] For example, the first lens group 11 is configured as a positive focal lens group, the zoom lens group 12 is configured as a negative focal lens group, the compensating lens group 13 is configured as a negative focal lens group, and the second lens group 14 is configured as a positive focal lens group. The first lens group 11 and the second lens group 14 maintain a fixed distance. When the zoom lens group 12 and the compensating lens group 13 move along the axis, the zoom lens group 12 achieves stepless continuous zoom to adjust the magnification and adapt to different observation needs. The compensating lens group 13 corrects aberrations to ensure that the image plane is clear.

[0033] In some examples, the parameter Figure 2 , Figure 3 and Figure 7 As shown, the zoom lens assembly 12 includes: a zoom lens mount 122, which has a first positioning groove 123 for centering and adjusting the zoom lens barrel 121; a first adjusting member 411 extends radially through the zoom lens mount 122 and partially into the first positioning groove 123, with one end of the first adjusting member 411 extending into the first positioning groove 123 abutting against the zoom lens barrel 121. The inner bottom surface 1232 of the first positioning groove 123 axially supports the zoom lens barrel 121 and contacts the zoom lens barrel 121 to form a radial contact surface, allowing the zoom lens barrel 121 to move radially on the inner bottom surface 1232 of the first positioning groove 123.

[0034] The first adjusting member 411 (e.g., a differential screw) passes radially through the zoom lens mount 122, and its end abuts against the zoom lens barrel 121. By rotating the first adjusting member 411, the zoom lens barrel 121 is driven to undergo a micron-level displacement radially on the inner bottom surface 1232 of the first positioning groove 123, so as to adjust the radial position of the zoom lens 124. After the optical axis of the zoom lens 124 coincides with the optical axis of the second lens 142, the first adjusting member 411 is locked to maintain the radial locking force on the zoom lens barrel 121. In conjunction with the first elastic positioning member 421, a reverse elastic force opposite to that of the first adjusting member 411 is formed on the zoom lens barrel 121 to stabilize the zoom lens barrel 121 in the adjusted position.

[0035] In some examples, the parameter Figure 2 , Figure 3 and Figure 6 As shown, the compensating lens assembly 13 includes: a compensating lens base 132, which has a second positioning groove 133 for centering and adjusting the compensating lens barrel 131; a second adjusting member 412 extends radially through the compensating lens base 132 and partially extends into the second positioning groove 133, with one end of the second adjusting member 412 extending into the second positioning groove 133 abutting against the compensating lens barrel 131. The inner bottom surface 1332 of the second positioning groove 133 axially supports the compensating lens barrel 131 and contacts the compensating lens barrel 131 to form a radial contact surface, allowing the compensating lens barrel 131 to be radially displaced on the inner bottom surface 1332 of the second positioning groove 133.

[0036] The second adjusting member 412 (e.g., a differential screw) passes radially through the compensating lens base 132, and its end abuts against the compensating lens barrel 131. By rotating the second adjusting member 412, the compensating lens barrel 131 is driven to undergo a micron-level displacement radially on the inner bottom surface 1332 of the second positioning groove 133, so as to adjust the radial position of the compensating lens 134. After the optical axis of the compensating lens 134 coincides with the optical axis of the second lens group 14, the second adjusting member 412 is locked to maintain the radial locking force on the compensating lens barrel 131. The second elastic positioning member 422 forms a reverse elastic force on the compensating lens barrel 131 opposite to that of the second adjusting member 412, so that the compensating lens barrel 131 is stabilized in the adjusted position.

[0037] Preferably, in this embodiment, two first adjustment members 411 are respectively provided on the outer side of the zoom lens group 12 included in the imaging optical path P1 and imaging optical path P2. The two first adjustment members 411 are equally spaced relative to the first elastic positioning member 421. By simultaneously and individually fine-tuning the two first adjustment members 411, the radial displacement of the zoom lens barrel 121 can be precisely controlled, ensuring that the optical axis of the zoom lens 124 coincides with the optical axis of the second lens 142, and avoiding tilting of the zoom lens barrel 121 caused by unilateral force application, thereby improving adjustment stability and accuracy. Two second adjustment members 412 are respectively provided on the outer side of the compensation lens group 13 included in the imaging optical path P1 and imaging optical path P2. The two second adjustment members 412 are equally spaced relative to the second elastic positioning member 422. By simultaneously and individually fine-tuning the two second adjustment members 412, the radial displacement of the compensation lens barrel 131 can be precisely controlled, ensuring that the optical axis of the compensation lens barrel 131 coincides with the optical axis of the second lens 142, and avoiding tilting of the compensation lens barrel 131 caused by unilateral force application, thereby improving adjustment stability and accuracy.

[0038] Preferably, in this embodiment, the end of the first adjusting member 411 that abuts against the zoom lens barrel 121 and the end of the second adjusting member 412 that abuts against the compensation lens barrel 131 are both configured as spherical. The spherical end (not shown) of the first adjusting member 411 and the spherical end (not shown) of the second adjusting member 412 respectively form point contact (or very small area contact) with the zoom lens barrel 121 and the compensation lens barrel 131. This can reduce sliding friction, make the optical axis alignment adjustment process smoother, and avoid jamming, thereby improving the accuracy of micron-level displacement.

[0039] In some examples, the parameter Figure 2 , Figure 3 and Figure 7 and Figure 9 As shown, the first positioning groove 123 has a first limiting groove 1231 formed in the groove wall, and the outer wall of the zoom lens barrel 121 is recessed in the circumferential direction to form a third limiting groove 1211 that corresponds to the first limiting groove 1231 in the radial direction; the first elastic positioning member 421 is embedded in the first limiting groove 1231, and the first elastic positioning member 421 is constructed to form a first arc-shaped inner wall 4211 that makes point-line contact with the third limiting groove 1211, so as to form a radial elastic clamping of the zoom lens barrel 121; one end of the first adjusting member 411 extending into the first positioning groove 123 abuts against the third limiting groove 1211.

[0040] The first limiting groove 1231 is configured to embed the first elastic positioning member 421 (e.g., spring steel wire), so as to fix the installation position of the first elastic positioning member 421 and prevent the first elastic positioning member 421 from separating from the zoom lens mount 122. A part of the inner wall of the first elastic positioning member 421 is processed into an arc-shaped curved surface to form a first arc-shaped inner wall 4211. The first arc-shaped inner wall 4211 forms point-line contact with the third limiting groove 1211, so as to realize radial elastic clamping of the third limiting groove 1211. Meanwhile, one end of the first adjusting member 411 extending into the first positioning groove 123 abuts against the third limiting groove 1211, so as to generate a radial locking force on the zoom lens barrel 121. The first elastic positioning member 421 cooperates with the first adjusting member 411 to jointly suppress the displacement of the zoom lens barrel 121 in the radial direction and / or axial direction, so that the zoom lens barrel 121 is stabilized at the adjusted position.

[0041] Referring Figure 2 , Figure 3 and Figure 6 and Figure 8 as shown, a groove wall of the second positioning groove 133 is provided with a second limiting groove 1331, and an outer wall of the compensation lens barrel 131 is recessed in the circumferential direction to form a fourth limiting groove 1311 radially corresponding to the second limiting groove 1331; the second elastic positioning member 422 is embedded in the second limiting groove 1331, and the second elastic positioning member 422 is provided with a second arc-shaped inner wall 4221 that forms point-line contact with the fourth limiting groove 1311, so as to form radial elastic clamping on the compensation lens barrel 131, and one end of the second adjusting member 412 extending into the second positioning groove 133 abuts against the fourth limiting groove 1311.

[0042] The second limiting groove 1331 is configured to embed the second elastic positioning member 422 (e.g., spring steel wire), so as to fix the installation position of the second elastic positioning member 422 and prevent the second elastic positioning member 422 from separating from the compensation lens mount 132. A part of the inner wall of the second elastic positioning member 422 is processed into an arc-shaped curved surface to form a second arc-shaped inner wall 4221. The second arc-shaped inner wall 4221 forms point-line contact with the fourth limiting groove 1311, so as to realize radial elastic clamping of the fourth limiting groove 1311. Meanwhile, one end of the second adjusting member 412 extending into the second positioning groove 133 abuts against the fourth limiting groove 1311, so as to generate a radial locking force on the compensation lens barrel 131. The second elastic positioning member 422 cooperates with the second adjusting member 412 to jointly suppress the displacement of the compensation lens barrel 131 in the radial direction and / or axial direction, so that the compensation lens barrel 131 is stabilized at the adjusted position.

[0043] Preferably, in this embodiment, the axial cross-sectional shapes of the third limiting groove 1211 and the fourth limiting groove 1311 are configured as triangles.

[0044] Referring Figure 9As shown, the first arc-shaped inner wall 4211 of the first elastic positioning member 421 forms point-line contact with the lower surface 1212 of the third limiting groove 1211. Through the active driving force formed by the first adjusting member 411 on the third limiting groove 1211, the first arc-shaped inner wall 4211 of the first elastic positioning member 421 generates a reverse elastic force on the lower surface 1212 of the third limiting groove 1211, so that the first elastic positioning member 421 and the first adjusting member 411 can jointly press the zoom lens barrel 121 against the radial contact surface of the zoom lens mount 122, so that the zoom lens barrel 121 and the zoom lens mount 122 always maintain close axial contact, so that the zoom lens barrel 121 is stabilized at the adjusted position, and long-term stability of the coincidence between the optical axis of the zoom lens barrel 121 and the optical axis of the second lens 142 is maintained.

[0045] Refer to Figure 8 As shown, the second arc-shaped inner wall 4221 of the second elastic positioning member 422 forms point-line contact with the lower surface 1312 of the fourth limiting groove 1311. Through the active driving force formed by the second adjusting member 412 on the fourth limiting groove 1311, the second arc-shaped inner wall 4221 of the second elastic positioning member 422 generates a reverse elastic force on the lower surface 1312 of the fourth limiting groove 1311, so that the second elastic positioning member 422 and the second adjusting member 412 can jointly press the compensation lens barrel 131 against the radial contact surface of the compensation lens mount 132, so that the compensation lens barrel 131 and the compensation lens mount 132 always maintain close axial contact, so that the compensation lens barrel 131 is stabilized at the adjusted position, and long-term stability of the coincidence between the optical axis of the compensation lens 134 and the optical axis of the second lens 142 is maintained.

[0046] Refer to Figure 1 And Figure 5 As shown, the support assembly 20 comprises: a mounting base 21 configured with the second lens group 14, and two upright columns disposed on the mounting base 21 and oppositely arranged on both sides of the second lens group 14. The length direction of the upright columns is parallel to the optical axis, and the two ends of the upright columns along the length direction thereof are respectively connected to the mounting base 21 and a bridging base 24 configured with the first lens group 11, so as to keep the axial spacing between the first lens group 11 and the second lens group 14 constant. The two ends of the upright columns are respectively connected to the mounting base 21 and the bridging base 24 via threads or flanges. The support assembly 20 forms a rigid support structure through the mounting base 21 and the two parallel upright columns, so as to ensure that the axial spacing between the first lens group 11 and the second lens group 14 is constant, and maintain the coincidence of the optical axes of the first lens group 11 and the second lens group 14. The second lens group 14 comprises a second lens barrel 141 disposed on the mounting base 21, and a second lens 142 disposed in the second lens barrel 141.

[0047] Refer to Figure 2As shown, the support assembly 20 further includes: the first lens group 11 comprises: a first lens barrel 111, and a first lens 112 arranged in the first lens barrel 111; the bridging seat 24 is provided with a sliding groove 241 for accommodating a part of the first lens barrel 111, and the first lens barrel 111 is adjustable in the sliding groove 241 along the horizontal plane where the sliding groove 241 is located. The translational adjustment of the first lens barrel 111 in the sliding groove 241 and along the horizontal plane where the sliding groove 241 is located is performed to calibrate the coincidence between the optical axis of the first lens 112 and a reference optical axis (such as the optical axis of the second lens 142), and the first lens group 11 is fixed to the bridging seat 24 by a locking unit (not shown) (such as a screw or a pressing block), so as to fix the adjusted position of the first lens group 11 (that is, the position where the optical axis of the first lens 112 coincides with the optical axis of the second lens 142), and maintain the coincidence of the optical axes of the first lens 112 and the second lens 142.

[0048] Refer Figures 1 to 3 to Figure 5 shown, the guide assembly 30 comprises: a rotating cylinder 31 rotatably connected to the mounting seat 21, a zoom guide portion 311 and a compensation guide portion 312 are formed on the cylinder wall of the rotating cylinder 31, a first sliding seat 32 that is provided with a zoom lens seat 122 and slides along a vertical column, a second sliding seat 33 that is provided with a compensation lens seat 132 and slides along another vertical column, a first guide member 34 (such as a bearing) arranged outside the first sliding seat 32 and guided by the zoom guide portion 311 to displace along the axial direction, and a second guide member 35 (such as a bearing) arranged outside the second sliding seat 33 and guided by the compensation guide portion 312 to displace along the axial direction. When the rotating cylinder 31 rotates relative to the mounting seat 21, it simultaneously drives the zoom guide portion 311 and the compensation guide portion 312 on the cylinder wall of the rotating cylinder 31 to rotate. The zoom guide portion 311 and the compensation guide portion 312 respectively push the first guide member 34 and the second guide member 35 to move linearly through their own rotational motion, so as to simultaneously drive the zoom lens group 12 and the compensation lens group 13 to displace along the axial direction, thereby realizing continuous adjustment of the magnification. Meanwhile, the first sliding seat 32 and the second sliding seat 33 slide along the first vertical column 22 and the second vertical column 23 respectively, so as to ensure that the movement trajectories of the zoom lens group 12 and the compensation lens group 13 are parallel to the optical axis and avoid deviation.

[0049] Refer Figures 1 to 3 to Figure 5As shown, the zoom guide portion 311 is configured as a first helical curved surface arranged spirally in the axial direction around the side wall of the rotary barrel 31, and the first guide member 34 is in rolling contact with the first helical curved surface; the compensation guide portion 312 is configured as a second helical curved surface arranged spirally in the axial direction around the side wall of the rotary barrel 31, and the second guide member 35 is in rolling contact with the second helical curved surface; when the rotary barrel 31 rotates relative to the mounting base 21, the zoom lens base 122 and the compensation lens base 132 are displaced along the optical axis at the same time. When the rotary barrel 31 rotates relative to the mounting base 21, the first guide member 34 rolls along the zoom guide portion 311 (the first helical curved surface) to push the first sliding base 32 to move axially along the first column 22, and the second guide member 35 rolls along the compensation guide portion 312 (the second helical curved surface) simultaneously to push the second sliding base 33 to move axially along the second column 23. The first sliding base 32 and the second sliding base 33 respectively drive the zoom lens group 12 and the compensation lens group 13 to move axially at the same time, so that the zoom lens group 12 changes the magnification and the compensation lens group 13 corrects aberrations.

[0050] Refer to Figure 1 , Figure 6 and Figure 7 , as shown, the guide assembly 30 further comprises: a first connecting plate 36 disposed on the first sliding base 32, first elastic members 37 (e.g., springs) disposed at both ends of the first connecting plate 36 extending through the first sliding base 32, a second connecting plate 38 disposed on the second sliding base 33, and second elastic members 39 (e.g., springs) disposed at both ends of the second connecting plate 38 extending through the second sliding base 33; both ends of the first elastic members 37 in the length direction thereof are connected to the first connecting plate 36 and the mounting base 21 respectively, and both ends of the second elastic members 39 in the length direction thereof are connected to the second connecting plate 38 and the mounting base 21 respectively. Both ends of the first elastic members 37 are respectively fixed to the first connecting plate 36 and the mounting base 21 to generate an axial elastic force, and the elastic force of the first elastic members 37 is transmitted to the first sliding base 32 through the first connecting plate 36, so that the first guide member 34 and the zoom guide portion 311 always maintain rolling contact during the whole movement process, and the rebound vibration that may occur when the first sliding base 32 moves axially is suppressed, the zooming accuracy is improved, which solves the problem that in a conventional zoom system, when rapid zooming is performed, the sliding base provided with the zoom lens generates rebound vibration due to inertia or mechanical clearance, resulting in temporary magnification inaccuracy. Both ends of the second elastic members 39 are respectively fixed to the second connecting plate 38 and the mounting base 21 to generate an axial elastic force, and the elastic force of the second elastic members 39 is transmitted to the second sliding base 33 through the second connecting plate 38, so that the second guide member 35 and the compensation guide portion 312 always maintain rolling contact during the whole movement process, and the rebound vibration that may occur when the second sliding base 33 moves axially is suppressed, and the image plane stability is improved.

[0051] Refer to Figure 3 , Figure 6 and Figure 7As shown, the zoom lens mount 122 is configured with a first guide end 1221 fitted to the outer periphery of the column part, and the first guide end 1221 forms sliding contact with the column; the compensation lens mount 132 is configured with a second guide end 1321 fitted to the outer periphery of the column part, and the second guide end 1321 forms sliding contact with the column. The first guide end 1221 forms fitting sliding contact with the profile of the second column 23, and the second guide end 1321 forms fitting sliding contact with the profile of the first column 22, so that the zoom lens mount 122 and the compensation lens mount 132 can be further guided to move along the axial direction, avoiding radial offset.

[0052] Refer to Figure 1 and Figure 5 As shown, the dual optical path continuous zoom device 100 for a surgical microscope further comprises: a driving unit 50 (e.g., a stepping motor) configured to drive the rotating cylinder 31 to rotate relative to the mounting base 21. The driving unit 50 is disposed on the mounting base 21. A tooth block structure (not labeled) is circumferentially arranged on the outer wall of the rotating cylinder 31, and an output end of the driving unit 50 is provided with a gear (not shown) meshed with the tooth block structure. The rotation angle and speed of the rotating cylinder 31 can be accurately controlled through the driving unit 50, so as to realize stepless zoom and dynamic aberration correction, and improve the accuracy, reliability and integration of the dual optical path continuous zoom device 100 for the surgical microscope.

[0053] Refer to Figure 2 and Figure 5 As shown, the rotating cylinder 31 is configured with a rotating part 313 rotatably connected to the mounting base 21, the dual optical path continuous zoom device 100 for the surgical microscope further comprises two elastic pressing sheets 26 symmetrically arranged on two sides of the rotating cylinder 31, and each elastic pressing sheet 26 is convexly formed with an elastic pressing part 261 (e.g., a spring sheet) in rotating contact with the rotating part 313. Smooth rotation of the rotating cylinder 31 is ensured through the rotating part 313, and shaking is reduced. The elastic pressing sheets 26 closely abut against the rotating part 313 through the elastic pressure of the elastic pressing parts 261, so as to reduce the axial gap between the rotating cylinder 31 and the mounting base 21 and avoid displacement errors during zooming.

[0054] The series of specific descriptions listed above are merely specific descriptions of the feasible implementation modes of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent implementation modes or modifications made without departing from the technical spirit of the present invention shall be included within the protection scope of the present invention.

[0055] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dual-optical-path continuous zoom device for a surgical microscope, characterized in that, include: The optical path assembly includes an optical path component, a support component, a guide component, and an alignment adjustment component. The optical path component comprises a first lens group, a zoom lens group, a compensation lens group, and a second lens group arranged sequentially along the optical axis from the object side. The support assembly is used to maintain a constant axial distance between the first lens group and the second lens group and to ensure that the optical axis of the first lens group coincides with the optical axis of the second lens group. The guide assembly is used to adjust the axial distance between the zoom lens group and the compensation lens group; Both the zoom lens group and the compensation lens group are equipped with the centering adjustment component, which includes an adjustment element and an elastic positioning element. A first adjusting member disposed in the zoom lens group is used to drive the zoom lens barrel included in the zoom lens group to move radially. A first elastic positioning member disposed in the zoom lens group abuts against the opposite side of the zoom lens barrel relative to the first adjusting member and forms a radial elastic force on the zoom lens barrel to adjust the optical axis of the zoom lens included in the zoom lens barrel to coincide with the optical axis of the second lens included in the second lens group. The second adjusting member configured in the compensating lens assembly is used to drive the compensating lens barrel included in the compensating lens assembly to move radially. The second elastic positioning member configured in the compensating lens assembly abuts against the side of the compensating lens barrel opposite to the second adjusting member and forms a radial elastic force on the compensating lens barrel to adjust the optical axis of the compensating lens included in the compensating lens barrel to coincide with the optical axis of the second lens. The support assembly includes: a mounting base for configuring the second lens group, and two columns configured on the mounting base and disposed opposite to each other on both sides of the second lens group; The zoom lens assembly includes a zoom lens mount, and the compensation lens assembly includes a compensation lens mount; The guiding assembly includes: a rotating cylinder rotatably connected to the mounting base, the cylinder wall of which is configured with a zoom guide portion and a compensation guide portion; a first sliding seat that equips the zoom lens mount and slides along the column; a second sliding seat that equips the compensation lens mount and slides along another column; a first guide member disposed outside the first sliding seat and guided by the zoom guide portion to move axially; a second guide member disposed outside the second sliding seat and guided by the compensation guide portion to move axially; a first connecting piece disposed on the first sliding seat; a first elastic member disposed on the first connecting piece extending through both ends of the first sliding seat; a second connecting piece disposed on the second sliding seat; and a second elastic member disposed on the second connecting piece extending through both ends of the second sliding seat. The first elastic element is connected to the first connecting piece and the mounting base at both ends along its length, and the second elastic element is connected to the second connecting piece and the mounting base at both ends along its length.

2. The dual-optical-path continuous zoom device for surgical microscopes according to claim 1, characterized in that, The zoom lens mount has a first positioning groove for centering and adjusting the zoom lens barrel; The first adjusting member extends radially through the zoom lens mount and partially into the first positioning groove, with one end of the first adjusting member extending into the first positioning groove abutting against the zoom lens barrel. The compensation lens mount has a second positioning groove for centering and adjusting the compensation lens barrel; The second adjusting member extends radially through the compensating lens mount and partially into the second positioning groove, with one end of the second adjusting member extending into the second positioning groove abutting against the compensating lens barrel.

3. The dual-optical-path continuous zoom device for surgical microscopes according to claim 2, characterized in that, The first positioning groove is formed by forming a first limiting groove in the groove wall, and the outer wall of the zoom lens barrel is recessed in the circumferential direction to form a third limiting groove that corresponds to the first limiting groove in the radial direction. The first elastic positioning member is embedded in the first limiting groove. The first elastic positioning member is constructed to form a first arc-shaped inner wall that makes point-line contact with the third limiting groove, so as to form a radial elastic clamping of the zoom lens barrel. One end of the first adjusting member extending into the first positioning groove abuts against the third limiting groove. The second positioning groove is formed by opening a second limiting groove in the groove wall, and the outer wall of the compensation lens tube is recessed in the circumferential direction to form a fourth limiting groove that corresponds to the second limiting groove in the radial direction. The second elastic positioning member is embedded in the second limiting groove. The second elastic positioning member is constructed to form a second arc-shaped inner wall that makes point-line contact with the fourth limiting groove, so as to form a radial elastic clamping on the compensating lens barrel. One end of the second adjusting member extending into the second positioning groove abuts against the fourth limiting groove.

4. The surgical microscope dual-path continuous zoom device according to claim 1, characterized in that, The column is parallel to the optical axis along its length, and the two ends of the column along its length are respectively connected to the mounting base and the bridging base for configuring the first lens group, so as to keep the axial distance between the first lens group and the second lens group constant.

5. The dual-optical-path continuous zoom device for surgical microscopes according to claim 4, characterized in that, The first lens assembly includes: a first lens barrel, and a first lens disposed within the first lens barrel; The bridging seat has a groove that forms a accommodating portion of the first lens barrel, and the first lens barrel is adjustable along the horizontal plane of the groove.

6. The dual-optical-path continuous zoom device for surgical microscopes according to claim 1, characterized in that, The variable magnification guide is configured as a first helical surface arranged in a spiral shape along the axial direction around the side wall of the rotating cylinder, and the first guide member is in rolling contact with the first helical surface; The compensation guide is configured as a second helical surface arranged in a helical shape along the axial direction around the side wall of the rotating cylinder, and the second guide makes rolling contact with the second helical surface; When the rotating cylinder rotates relative to the mounting base, the zoom lens mount and the compensation lens mount simultaneously move along the optical axis.

7. The dual-optical-path continuous zoom device for surgical microscopes according to claim 1, characterized in that, The zoom lens mount has a first guide portion on the side near the second sliding seat, and the first guide portion fits against the outer periphery of the column portion and forms a sliding contact with the column. The compensation mirror mount has a second guide portion constructed on the side near the first sliding seat. The second guide portion fits against the outer periphery of the column portion and forms a sliding contact with the column.

8. The dual-optical-path continuous zoom device for surgical microscopes according to claim 1, characterized in that, The surgical microscope dual-path continuous zoom device further includes a drive unit for driving the rotating cylinder to rotate relative to the mounting base.

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