An endoscope working distance adaptive adjustable system, an endoscope imaging system and application

Abstract

The application provides an endoscope working distance adaptive adjustable system, an endoscope imaging system and application, and the endoscope working distance adaptive adjustable system comprises: an image transmission mirror sheath, a mirror seat, a protective mirror sheath, and a working distance auxiliary adjusting system arranged between the protective mirror sheath and the mirror seat and / or arranged between the protective mirror sheath and the image transmission mirror sheath; the mirror seat is formed with a supporting portion in the axial direction, and the inside of the image transmission mirror sheath away from the image side is configured with an imaging lens; the protective mirror sheath comprises: an outside sheath tube extending in the axial direction and passing through the imaging lens, a sheath tube connecting portion partially sleeved outside the supporting portion and connected with the outside sheath tube, and a protective lens arranged in the object side end of the outside sheath tube; the working distance auxiliary adjusting system is used for adjusting the relative axial position between the imaging lens and the protective lens and keeping the working distance between the protective lens and the imaging lens. Through the working distance auxiliary adjusting system, the best object distance of the endoscope imaging system is realized, and the microscopic imaging quality is ensured.

Description

Technical Field

[0001] This invention relates to the field of endoscopic microscopy, and more particularly to an adaptive adjustable working distance system for endoscopes, an endoscopic imaging system, and their applications. Background Technology

[0002] Endoscopic microscopes are widely used in medical diagnosis and treatment to observe and manipulate minute tissue structures. In clinical practice, they provide doctors with cellular-level imaging support, offering reliable diagnostic evidence for accurate lesion identification. Because endoscopes directly contact human tissue and present cellular-level images, their magnification is typically above 1000x. Therefore, even an error of 0.1mm can significantly affect the imaging results. Thus, precisely maintaining the endoscope at the optimal working distance (i.e., the optimal imaging distance between the objective lens and the human tissue) is crucial.

[0003] In existing technologies, traditional endoscopic microscopes typically maintain the optimal working distance by fixing protective lenses or other adjustment structures. However, due to assembly tolerances, the working distance of endoscopic microscopes may vary slightly, making it difficult to achieve the optimal object distance, thus directly affecting the quality of microscopic imaging.

[0004] In view of this, it is necessary to improve the existing endoscopic microscopes to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to disclose an adaptive adjustable working distance system for endoscopes, an endoscope imaging system, and its application, in order to solve many defects existing in the endoscopic microscopes of the prior art, especially to achieve the optimal object distance of the endoscopic imaging system and ensure the quality of microscopic imaging.

[0006] To achieve the above objectives, in a first aspect, the present invention provides an adaptive adjustable working distance system for an endoscope, comprising: an image-transmitting sheath, a mount disposed on the image side of the image-transmitting sheath, a protective sheath sleeved on the outside of the image-transmitting sheath, and a working distance auxiliary adjustment system disposed between the protective sheath and the mount and / or between the protective sheath and the image-transmitting sheath.

[0007] The mirror mount extends axially to form a support portion, and the imaging lens is disposed inside the image transmission mirror sheath away from the image side;

[0008] The protective sheath includes: an outer sheath extending axially through the imaging lens, a sheath connecting portion partially sleeved on the outside of the support portion and connected to the outer sheath, and a protective lens disposed inside the object-side end of the outer sheath.

[0009] The working distance auxiliary adjustment system is used to adjust the relative axial position between the imaging lens and the protective lens, and to maintain the working distance between the protective lens and the imaging lens.

[0010] As a further improvement of the present invention, the working distance auxiliary adjustment system is configured as a first tight ring sleeved on the outside of the support portion;

[0011] The outer periphery of the support portion forms at least a first guide portion, and the sheath connection portion is connected to the support portion via the first guide portion;

[0012] When the sheath connection rotates axially relative to the support, the first guide guides the sheath connection to move axially so that after adjusting the axial position of the protective lens relative to the imaging lens, the first tightening ring is axially held between the sheath connection and the support.

[0013] As a further improvement of the present invention, the working distance auxiliary adjustment system is configured as a second tight ring sleeved on the outside of the image transmission mirror sheath;

[0014] The outer periphery of the support portion forms at least a first guide portion, and the sheath connection portion is connected to the support portion via the first guide portion;

[0015] When the sheath connection rotates axially relative to the support, the first guide guides the sheath connection to move axially so that after adjusting the axial position of the protective lens relative to the imaging lens, the second tightening ring is axially held between the sheath connection and the support.

[0016] As a further improvement of the present invention, the support portion is configured as a limiting portion that restricts the axial rotation of the sheath connection portion;

[0017] The working distance auxiliary adjustment system is configured as a movable cylinder that is partially sleeved on the outside of the sheath connection and rotatably connected to the mirror mount.

[0018] A second guide portion is constructed on the inner circumference of the movable cylinder. When the movable cylinder rotates relative to the sheath connection portion, the second guide portion guides the sheath connection portion to move axially along the support portion, thereby adjusting the axial position of the protective lens relative to the imaging lens.

[0019] As a further improvement of the present invention, the working distance auxiliary adjustment system is configured to be abutted against the imaging lens and the protective lens along the axial direction to adjust the axial position of the protective lens relative to the imaging lens.

[0020] As a further improvement of the present invention, after the protective sheath is fitted onto the support portion, a sealed space is formed between it and the image transmission sheath.

[0021] As a further improvement of the present invention, the first guide portion is configured as an external thread portion, and the inner periphery of the sheath connection portion is constructed to have an internal thread portion that engages with the external thread portion.

[0022] As a further improvement of the present invention, the sheath connection includes: a retaining portion for fixing the outer sheath, and an adjusting portion for forming the internal thread portion to connect the support portion.

[0023] As a further improvement of the present invention, the mirror base is radially protruding outward to form a protrusion that axially abuts against the first tightening ring, and the adjusting part axially abuts against the side of the first tightening ring opposite to the protrusion.

[0024] As a further improvement of the present invention, the support portion abuts axially against the second tightening ring, and the retaining portion abuts axially against the side of the second tightening ring opposite to the support portion.

[0025] As a further improvement of the present invention, the second guide portion is configured as an internal thread portion, and the outer periphery of the sheath connection portion is constructed to have an external thread portion that engages with the internal thread portion.

[0026] As a further improvement of the present invention, the working distance auxiliary adjustment system further includes: a bearing disposed between the mirror base and the movable cylinder, wherein the movable cylinder achieves axial rotation relative to the mirror base through the bearing.

[0027] As a further improvement of the present invention, the movable cylinder includes: a fixed cylinder section that is fixedly connected to the bearing, and an adjusting cylinder section that forms the internal thread portion and is sleeved on the outside of the sheath connection portion.

[0028] As a further improvement of the present invention, the sheath connection portion includes: a retaining portion for fixing the outer sheath, and an adjusting portion for forming the external thread portion;

[0029] The adjustment part is constructed with a movable groove that matches the outer contour of the support part.

[0030] As a further improvement of the present invention, the working distance auxiliary adjustment system further includes a locking member that penetrates radially through the wall of the adjustment cylinder section to abut against the sheath connection.

[0031] In a second aspect, the present invention also provides an endoscopic imaging system, comprising: an endoscopic working distance adaptive adjustable system as described in any one aspect, an image-rotating lens coaxially disposed within an image-transfer sheath included in the endoscopic working distance adaptive adjustable system, a dichroic mirror disposed within a mount included in the endoscopic working distance adaptive adjustable system, and a light source.

[0032] Thirdly, the present invention also provides an application of an endoscopic imaging system for optical imaging of biological tissues using an endoscopic imaging system as described in any one of the second aspects.

[0033] Compared with the prior art, the beneficial effects of the present invention are: during the process of adjusting the optimal object distance, the axial position of the protective lens relative to the imaging lens is adjusted by the working distance auxiliary adjustment system, so as to adjust the axial distance between the protective lens and the imaging lens, so that the relative position of the protective lens and the imaging lens is kept within the optimal range, ensuring that the imaging lens and the protective lens are at the optimal working distance, thereby achieving the optimal object distance and ensuring high-quality microscopic imaging. Attached Figure Description

[0034] Figure 1 This is an overall schematic diagram of the endoscope working distance adaptive adjustable system disclosed in this invention, wherein the working distance auxiliary adjustment system is configured as a first tight ring sleeved on the outside of the support portion;

[0035] Figure 2 A schematic diagram showing the working distance auxiliary adjustment system configured as a second tightening ring fitted on the outside of the image transmission lens sheath;

[0036] Figure 3 A schematic diagram showing that the working distance auxiliary adjustment system is configured as a movable cylinder partially sleeved on the outside of the sheath connection and rotatably connected to the mirror mount;

[0037] Figure 4 A schematic diagram showing a working distance auxiliary adjustment system configured to be held against a spacer between the imaging lens and the protective lens along the axial direction;

[0038] Figure 5 for Figure 3 A sectional view along the direction of the middle arrow AA;

[0039] Figure 6 This is a schematic diagram of the overall endoscope imaging system including an adaptive adjustable endoscope working distance system disclosed in this invention. Detailed Implementation

[0040] The present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings. It should be noted that these embodiments are not limitations on the present invention, and any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art according to these embodiments shall fall within the protection scope of the present invention.

[0041] The drawings in the present invention are not strictly drawn according to the actual ratio, and the specific dimensions of each structure can be determined according to actual needs. The drawings described in the present invention are only schematic diagrams of the structure.

[0042] It should be noted that in the following embodiments, the term "optical axis" refers to Figure 1 the optical axis Q in the middle. The term "axial direction" refers to the direction parallel to the optical axis Q. In Figures 1 to 4 the perspective shown, as Figure 1 shown, 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. The measured object W includes a living organism or an ex vivo biological tissue.

[0043] Please refer to Figures 1 to 6 a specific embodiment of an endoscope working distance adaptive adjustment system, an endoscope imaging system, and an application disclosed.

[0044] As Figure 1 shown in Figure 4 and

[0045] referring to Figures 1 to 4As shown, in this embodiment, the endoscope working distance adaptive adjustable system 100 includes: an image transmission sheath 1, a mount 2 disposed on the image side of the image transmission sheath 1, a protective sheath 3 sleeved on the outside of the image transmission sheath 1, and a working distance auxiliary adjustment system 4 disposed between the protective sheath 3 and the mount 2 and / or between the protective sheath 3 and the image transmission sheath 1; the mount 2 extends axially to form a support portion 21, and the image transmission sheath 1 has an imaging lens 5 disposed inside away from the image side; the protective sheath 3 includes: an outer sheath tube 31 extending axially through the imaging lens 5, a sheath tube connecting portion 32 partially sleeved on the outside of the support portion 21 and connected to the outer sheath tube 31, and a protective lens 33 disposed inside the object-side end of the outer sheath tube 31; the working distance auxiliary adjustment system 4 is used to adjust the relative axial position between the imaging lens 5 and the protective lens 33, and maintain the working distance between the protective lens 33 and the imaging lens 5.

[0046] During the calibration of the optimal object distance, the adaptive adjustable working distance system 100 of this endoscope adjusts the axial position of the protective lens 33 relative to the imaging lens 5 through the working distance auxiliary adjustment system 4. This adjusts the axial distance between the protective lens 33 and the imaging lens 5, keeping their relative positions within the optimal range and ensuring that the imaging lens 5 and the protective lens 33 are at the optimal working distance. This achieves the optimal object distance and guarantees high-quality microscopic imaging. After calibration, the working distance auxiliary adjustment system 4 fixes the adjusted position of the protective lens 33 (relative to the imaging lens 5) to ensure that the working distance between the protective lens 33 and the imaging lens 5 remains stable after calibration, preventing changes in the working distance due to external factors (such as vibration or temperature changes) and maintaining the optimal object distance.

[0047] Compared to existing endoscopes where assembly tolerances make it difficult to achieve optimal object distance, this endoscope working distance adaptive adjustable system 100 uses the working distance auxiliary adjustment system 4 to maintain the relative position of the protective lens 33 and the imaging lens 5 within the optimal range, thereby achieving the optimal object distance between the imaging lens 5 and the protective lens 33 and solving the problem of existing technologies being unable to achieve optimal object distance.

[0048] In some examples, the parameter Figure 1 As shown, the image transmission sheath 1 is used to support and fix the imaging lens 5 so that after the working distance between the protective lens 33 and the imaging lens 5 is adjusted, the position of the imaging lens 5 is stably maintained, and the imaging lens 5 is prevented from being displaced by external factors during operation.

[0049] In some examples, the parameter Figure 1As shown, the lens mount 2 is located on the image side of the image transmission lens sheath 1, and the image transmission lens sheath 1 extends axially into the support portion 21. The support portion 21 provides stable support for the image transmission lens sheath 1 and the protective lens sheath 3, ensuring that the image transmission lens sheath 1 and the protective lens sheath 3 are assembled stably, so that the image transmission lens sheath 1 and the protective lens sheath 3 maintain a stable relative position during operation.

[0050] In some examples, the parameter Figure 1 As shown, the protective sheath 3 is fitted over the outside of the image transmission sheath 1 to protect the imaging lens 5 from external substances such as dust, moisture, and other potential contaminants. The outer sheath tube 31 extends axially, covering and protecting the imaging lens 5. The support part 21 is connected to the sheath tube connector 32 to ensure the stability of the protective sheath 3. The protective lens 33 is located at the object-side end of the outer sheath tube 31 to further protect the imaging lens 5 and reduce optical interference, reducing the interference of external light sources on the quality of microscopic imaging, and ensuring the clarity and quality of microscopic imaging.

[0051] In some examples, the parameter Figure 1 As shown, the working distance auxiliary adjustment system 4 is used to precisely adjust the axial position between the imaging lens 5 and the protective lens 33, and adjusts it according to the actual assembly tolerance to ensure that the working distance between the imaging lens 5 and the protective lens 33 is at the optimal range. After debugging, the working distance between the imaging lens 5 and the protective lens 33 is measured using a high-precision optical measuring instrument (not shown) or other high-precision distance measuring instrument (not shown) to ensure that the working distance is within the optimal range. Then, the adjusted position of the protective lens 33 (relative to the position of the imaging lens 5) is fixed by the working distance auxiliary adjustment system 4 to ensure that the adjusted working distance does not change during subsequent use and to avoid changes due to external factors. After fixing, multiple verification tests can be performed to ensure that the endoscope working distance adaptive adjustable system 100 can still provide clear and stable imaging effects under different object distance conditions.

[0052] In some examples, the parameter Figure 1 As shown, the working distance auxiliary adjustment system 4 is configured as a first tightening ring 41 sleeved on the outside of the support portion 21; at least a first guide portion is formed on the outer periphery of the support portion 21, and the sheath connection portion 32 is connected to the support portion 21 via the first guide portion; when the sheath connection portion 32 rotates axially relative to the support portion 21, the first guide portion guides the sheath connection portion 32 to move axially, so that after adjusting the axial position of the protective lens 33 relative to the imaging lens 5, the first tightening ring 41 is axially held between the sheath connection portion 32 and the support portion 21. By adjusting the thickness of the first tightening ring 41 in the axial direction, the axial distance between the protective lens 33 and the imaging lens 5 is precisely adjusted, thereby achieving the optimal object distance.

[0053] During the debugging process, the protective sheath 3 is first fixed to the support 21 by rotating the sheath connection 32. Then, the protective lens 33 is pressed against the surface of a live specimen (e.g., pig liver, pig kidney) to test the imaging effect. By rotating the sheath connection 32, the first guide part guides the sheath connection 32 to move axially, so as to synchronously drive the protective lens 33 inside the outer sheath 31 to move axially. After observing a high-definition microscopic image, the rotation of the sheath connection 32 is stopped to maintain the best imaging state. Then, the distance D1 between the end of the sheath connection 32 and the lens mount 2 is measured using a high-precision optical measuring instrument or other high-precision distance measuring instrument (e.g., ...). Figure 1 As shown in the diagram, based on the measurement results, select a first tightening ring 41 of appropriate thickness, remove the protective sheath 3 from the lens mount 2, and place the selected first tightening ring 41 of appropriate thickness on the outside of the support 21 and abut against the lens mount 2. Then, reinstall the protective sheath 3 onto the support 21, so that the sheath connection 32 abuts against the first tightening ring 41, so that the imaging lens 5 and the protective lens 33 are at the optimal working distance, thereby achieving the optimal object distance to ensure high-quality microscopic imaging. Finally, check the imaging effect. If the image is blurry or unclear, select a first tightening ring 41 of a nearby size for further adjustment until the imaging effect is optimal.

[0054] In some examples, the working distance auxiliary adjustment system 4 indirectly adjusts the axial distance between the protective lens 33 and the imaging lens 5 by utilizing the thickness of the first tightening ring 41, thereby achieving precise control of the working distance between the protective lens 33 and the imaging lens 5 and preventing changes in the working distance due to external factors or improper operation, so that the working distance between the protective lens 33 and the imaging lens 5 remains stable.

[0055] In some examples, the parameter Figure 2 As shown, the working distance auxiliary adjustment system 4 is configured as a second clamping ring 42 sleeved on the outside of the image transmission lens sheath 1; the outer periphery of the support portion 21 forms at least a first guide portion, and the sheath tube connection portion 32 is connected to the support portion 21 via the first guide portion; when the sheath tube connection portion 32 rotates axially relative to the support portion 21, the first guide portion guides the sheath tube connection portion 32 to move axially, so that after adjusting the axial position of the protective lens 33 relative to the imaging lens 5, the second clamping ring 42 is axially held between the sheath tube connection portion 32 and the support portion 21. By adjusting the thickness of the second clamping ring 42 in the axial direction, the axial distance between the protective lens 33 and the imaging lens 5 can be precisely adjusted, thereby achieving the optimal object distance.

[0056] During the debugging process, the protective sheath 3 is first fixed to the support 21 by rotating the sheath connection 32. Then, the protective lens 33 is pressed against the surface of a live specimen (e.g., pig liver, pig kidney) to test the imaging effect. By rotating the sheath connection 32, the first guide part guides the sheath connection 32 to move axially, so as to synchronously drive the protective lens 33 inside the outer sheath 31 to move axially. After observing a high-definition microscopic image, the rotation of the sheath connection 32 is stopped to maintain the best imaging state. Then, the distance D2 between the sheath connection 32 and the object-facing end of the support 21 is measured using a high-precision optical measuring instrument or other high-precision distance measuring instrument (e.g., ...). Figure 2 As shown in the diagram, select a second tightening ring 42 of appropriate thickness based on the measurement results. Remove the protective sheath 3 from the lens mount 2. Place the selected second tightening ring 42 of appropriate thickness on the outside of the image transmission lens sheath 1, abutting the end of the support 21 facing the object. Then reinstall the protective sheath 3 onto the support 21, so that the sheath tube connection 32 abuts against the second tightening ring 42, ensuring that the imaging lens 5 and the protective lens 33 are at the optimal working distance, thereby achieving the optimal object distance to ensure high-quality microscopic imaging. Finally, check the imaging effect. If the image is blurry or unclear, select a second tightening ring 42 of a similar size for further adjustment until the imaging effect is optimal.

[0057] In some examples, the working distance auxiliary adjustment system 4 indirectly adjusts the axial distance between the protective lens 33 and the imaging lens 5 by utilizing the thickness of the second tightening ring 42, thereby achieving precise control of the working distance between the protective lens 33 and the imaging lens 5 and preventing changes in the working distance due to external factors or improper operation, so that the working distance between the protective lens 33 and the imaging lens 5 remains stable.

[0058] In some examples, the parameter Figure 1 and Figure 2 As shown, the first guide portion is configured with an external thread, and the inner circumference of the sheath connection portion 32 is constructed with an internal thread that engages with the external thread. Through the engagement of the external thread (not shown) and the internal thread (not shown), the sheath connection portion 32 can be precisely rotated axially on the support portion 21 to precisely control the axial displacement distance of the protective lens 33 driven by the sheath connection portion 32, thereby precisely adjusting the working distance between the imaging lens 5 and the protective lens 33. Furthermore, after adjustment, the sheath connection portion 32 can be tightened by the engagement of the external and internal threads to fix it on the support portion 21, preventing changes in the working distance between the imaging lens 5 and the protective lens 33 due to external forces or vibrations during subsequent use.

[0059] In some examples, the parameter Figure 1 and Figure 2As shown, the sheath connection 32 includes a retaining portion 321 for fixing the outer sheath 31, and an adjusting portion 322 with an internal thread for connecting to the support portion 21. The retaining portion 321 is used to fix the outer sheath 31 in the sheath connection 32, ensuring the stability of the outer sheath 31 and preventing it from loosening or shifting during use. Furthermore, by securely fixing the outer sheath 31, other optical components (such as the imaging lens 5 and the protective lens 33) are indirectly protected, preventing external factors from affecting the optical components and ensuring the stability and clarity of the image. The adjusting portion 322 engages with the external thread of the support portion 21 through its internal thread, allowing the sheath connection 32 to be axially displaced relative to the support portion 21, thereby adjusting the working distance between the imaging lens 5 and the protective lens 33. It also ensures a tight connection between the sheath connection 32 and the support portion 21 after adjustment, fixing the position of the adjusted protective lens 33 and keeping the working distance between the adjusted imaging lens 5 and the protective lens 33 stable, preventing changes due to external factors.

[0060] In some examples, the parameter Figure 1 As shown, the lens mount 2 has a radially outwardly protruding portion 23 that axially abuts against the first tightening ring 41. The adjusting portion 322 axially abuts against the side of the first tightening ring 41 opposite to the protrusion 23. The protrusion 23 provides stable axial support for the first tightening ring 41, ensuring that the first tightening ring 41 is fixed and can withstand the axial pressure generated by the adjusting portion 322 during adjustment, thus ensuring that the first tightening ring 41 will not shift or loosen during working distance adjustment. By having the adjusting portion 322 axially abut against the back of the first tightening ring 41 (i.e., the side opposite to the protrusion 23), the first tightening ring 41 is finally fixed on the support portion 21, ensuring that the first tightening ring 41 can stably maintain its position after the working distance adjustment is completed, preventing accidental movement under external force, and ensuring a stable working distance between the imaging lens 5 and the protective lens 33, thereby guaranteeing the accuracy and long-term stability of the working distance adjustment.

[0061] In some examples, the parameter Figure 2As shown, the support portion 21 axially abuts against the second tightening ring 42, and the retaining portion 321 axially abuts against the second tightening ring 42 on the side facing away from the support portion 21. The retaining portion 321 axially abuts against the back side of the second tightening ring 42 (i.e., the side facing away from the support portion 21), and through its cooperation with the support portion 21, it stably fixes the axial position of the second tightening ring 42, ensuring that the position of the second tightening ring 42 will not loosen after adjustment, preventing the second tightening ring 42 from shifting due to external factors, thereby avoiding deviation of the working distance. At the same time, under the joint abutment of the support portion 21 and the retaining portion 321, the second tightening ring 42 can ensure the adjustment accuracy of the working distance between the imaging lens 5 and the protective lens 33, and after adjustment, stably maintain the working distance between the imaging lens 5 and the protective lens 33, avoiding changes in the working distance due to external factors, thereby ensuring the quality of microscopic imaging.

[0062] In some examples, the parameter Figure 3 As shown, the support portion 21 is configured with a limiting portion 211 to restrict the axial rotation of the sheath connection portion 32; the working distance auxiliary adjustment system 4 is configured as a movable cylinder 43 partially sleeved on the outside of the sheath connection portion 32 and rotatably connected to the lens mount 2; a second guide portion is configured on the inner circumference of the movable cylinder 43. When the movable cylinder 43 rotates relative to the sheath connection portion 32, the second guide portion guides the sheath connection portion 32 to move axially along the support portion 21 to adjust the axial position of the protective lens 33 relative to the imaging lens 5. During the debugging process, the protective lens 33 is pressed against the surface of a live specimen (e.g., pig liver, pig kidney, etc.) to test the imaging effect. By rotating the movable cylinder 43, the second guide portion guides the sheath connecting portion 32 to move along the support portion 21, synchronously driving the protective lens 33 inside the outer sheath 31 to move axially. Once a high-definition microscopic image is observed, the rotation of the movable cylinder 43 stops to maintain optimal imaging, ensuring the working distance between the imaging lens 5 and the protective lens 33 remains constant, thus achieving the optimal object distance and guaranteeing high-quality microscopic imaging. During the rotation of the movable cylinder 43, the second guide portion guides the sheath connecting portion 32 to move smoothly along the support portion 21, ensuring the smoothness and accuracy of adjusting the axial movement of the protective lens 33 relative to the imaging lens 5, thereby precisely adjusting the working distance between the protective lens 33 and the imaging lens 5.

[0063] The working distance auxiliary adjustment system 4 actively adjusts the axial distance between the protective lens 33 and the imaging lens 5 by rotating the movable cylinder 43, thereby achieving precise control of the working distance between the protective lens 33 and the imaging lens 5 and keeping the working distance between the protective lens 33 and the imaging lens 5 stable.

[0064] In some examples, the limiting part 211 can be configured as follows: Figure 5The support portion 21 shown has a recessed limiting surface on its outer periphery. This limiting surface prevents rotation of the sheath connection portion 32, ensuring that the protective lens 33 inside the outer sheath 31 moves precisely along a predetermined axial path during commissioning, thus ensuring the stability of the final working distance. The limiting portion 211 can also be configured with other structures capable of restricting rotation of the sheath connection portion 32; this disclosure does not limit this.

[0065] In some examples, the parameter Figure 3 As shown, the second guide portion is configured with an internal thread, and the outer periphery of the sheath connection portion 32 is constructed with an external thread that engages with the internal thread. Through the engagement of the internal thread (not shown) and the external thread (not shown), the axial displacement distance of the protective lens 33 relative to the imaging lens 5 can be precisely adjusted. By rotating the sheath connection portion 32, the axial displacement distance of the protective lens 33 relative to the imaging lens 5 can be gradually and precisely adjusted to ensure that the working distance between the imaging lens 5 and the protective lens 33 is within the optimal range, thereby achieving the best imaging effect. Furthermore, after the axial displacement distance of the protective lens 33 relative to the imaging lens 5 is adjusted, the engagement of the internal thread (not shown) and the external thread (not shown) fixes the adjusted position of the protective lens 33, thereby stabilizing and fixing the working distance between the adjusted protective lens 33 and the imaging lens 5, and preventing changes in the position of the protective lens 33 due to external factors during subsequent use.

[0066] In some examples, the parameter Figure 3 As shown, the working distance auxiliary adjustment system 4 also includes a bearing 44 disposed between the mirror base 2 and the movable cylinder 43. The movable cylinder 43 rotates axially relative to the mirror base 2 via the bearing 44. The bearing 44 is disposed between the mirror base 2 and the movable cylinder 43 to ensure smooth axial rotation of the movable cylinder 43 during working distance adjustment, reducing friction and resistance during rotation, making the rotation of the movable cylinder 43 smoother and more stable, avoiding resistance or jamming, thereby improving the efficiency of the working distance adjustment process and ensuring the accuracy of the adjustment process.

[0067] In some examples, the parameter Figure 3 As shown, the movable cylinder 43 includes a fixed cylinder section 431 that is fixedly connected to the bearing 44, and an adjusting cylinder section 432 that has an internal thread and is sleeved on the outside of the sheath connection portion 32. The bearing 44 is connected to the fixed cylinder section 431 to provide stable rotational support for the movable cylinder 43 and maintain the smoothness of the adjustment process. The adjusting cylinder section 432 engages with the external thread of the sheath connection portion 32 through its internal thread. By rotating the adjusting cylinder section 432, the working distance between the protective lens 33 and the imaging lens 5 can be adjusted.

[0068] In some examples, the parameter Figure 3 and Figure 5As shown, the sheath connection portion 32 includes: a retaining portion 321 for fixing the outer sheath 31, and an adjusting portion 322 forming an external thread; the adjusting portion 322 is constructed with a movable groove 3221 that matches the outer contour of the support portion 21. The retaining portion 321 is used to fix the outer sheath 31 in the sheath connection portion 32, ensuring the stability of the outer sheath 31 and preventing the outer sheath 31 from loosening or shifting during use. By matching the outer contour of the support portion 21 with the movable groove 3221, the adjusting portion 322 can move axially along the support portion 21, preventing rotation or radial displacement, and ensuring the accuracy and stability of the lens 33 during adjustment.

[0069] In some examples, the parameter Figure 3 As shown, the working distance auxiliary adjustment system 4 also includes a locking member 45 that penetrates radially through the wall of the adjusting cylinder section 432 to abut against the sheath connection portion 32. The locking member 45, by penetrating radially through the wall of the adjusting cylinder section 432 to abut against the sheath connection portion 32, firmly fixes the adjusted position of the protective lens 33, preventing accidental displacement or loosening of the relative position between the adjusting cylinder section 432 and the sheath connection portion 32 after adjustment. This ensures that during use, the working distance between the protective lens 33 and the imaging lens 5 is prevented from shifting due to external vibration, impact, or operation. Furthermore, by fixing the positions of the adjusting cylinder section 432 and the sheath connection portion 32 with the locking member 45, the long-term stability of the optimal working distance between the imaging lens 5 and the protective lens 33 is further ensured.

[0070] In some examples, the parameter Figure 4 As shown, the working distance auxiliary adjustment system 4 is configured with a washer 46 held axially between the imaging lens 5 and the protective lens 33 to adjust the axial position of the protective lens 33 relative to the imaging lens 5. By adjusting the thickness of the washer 46 along the axial direction, the distance between the protective lens 33 and the imaging lens 5 is precisely adjusted to achieve the optimal object distance. During the debugging process, after the imaging lens 5 is installed in the image transmission sheath 1, the working distance of the imaging lens 5 is optically measured. After determining the optimal working distance, the difference between the protective lens 33 and the optimal working distance is measured using a high-precision optical measuring instrument or other high-precision distance measuring instrument. Based on the measurement results, a washer 46 of appropriate thickness is selected and installed inside the outer sheath 31. The protective sheath 3 is then installed to the support part 21, so that the washer 46 is axially held between the protective lens 33 and the imaging lens 5, so that the imaging lens 5 and the protective lens 33 are at the optimal working distance, thereby achieving the optimal object distance and ensuring high-quality microscopic imaging. Finally, check the imaging effect. If the image is blurry or unclear, select a pad ring of the same size 46 for further adjustment until the imaging effect is optimal.

[0071] In some examples, the working distance auxiliary adjustment system 4 indirectly adjusts the axial distance between the protective lens 33 and the imaging lens 5 by utilizing the thickness of the spacer ring 46, so as to precisely control the working distance between the protective lens 33 and the imaging lens 5, and prevent the working distance from changing due to external factors or improper operations, so that the working distance between the protective lens 33 and the imaging lens 5 remains stable.

[0072] In some examples, a sealed space is formed between the protective lens sheath 3 and the image transmission lens sheath 1 after the protective lens sheath 3 is sleeved on the supporting portion 21. After the distance between the protective lens 33 and the imaging lens 5 is adjusted, a sealed space is formed between the protective lens sheath 3 and the image transmission lens sheath 1 to isolate the influence of pollutants such as dust and moisture in the external environment on the imaging lens 5 and the protective lens 33, and maintain the microscopic imaging quality. Especially in the medical field, the sealed space can ensure that the endoscopic working distance self-adjustable system 100 can maintain a sterile state in sensitive environments such as surgeries, so as to reduce the risk of external microorganisms or germs entering the endoscopic working distance self-adjustable system 100, thereby ensuring the hygiene and safety of the endoscopic working distance self-adjustable system 100. And through the sealed space, the optical path and imaging effect of the endoscopic working distance self-adjustable system 100 can be better protected, reducing the influence of environmental factors (such as temperature and humidity changes) on the system, thereby improving the microscopic imaging quality and the reliability of the system.

[0073] It should be noted that the intervals between the first clamping ring 41, the second clamping ring 42 and the spacer ring 46 with different thicknesses can be accurate to 0.01 mm. During the process that the movable cylinder 43 guides the sheath tube connecting portion 32 along the supporting portion 21 to axially displace through the second guiding portion, the axial displacement accuracy of the protective lens 33 relative to the imaging lens 5 can also reach 0.01 mm to ensure the precise adjustment of the final working distance. For example, during the debugging process, the optimal working distance has been determined and preliminarily measured, and a first clamping ring 41 (or the second clamping ring 42, spacer ring 46) with a suitable thickness has been selected and installed in the endoscopic working distance self-adjustable system 100. At this time, the working distance is close to the ideal value. However, under high-precision measurement, if there is still an error of 0.01 mm currently, a new first clamping ring 41 with a thickness of ±0.01 mm from the original first clamping ring 41 can be selected and reinstalled into the endoscopic working distance self-adjustable system 100 to precisely adjust the working distance and achieve the optimal object distance.

[0074] Based on the technical solutions of any of the above endoscopic working distance self-adjustable systems 100 disclosed in the foregoing embodiments and their reasonable combinations, this embodiment also discloses an endoscopic imaging system 1000.

[0075] See Figure 6As shown, the endoscopic imaging system 1000 includes: an endoscopic working distance adaptive adjustable system 100 as disclosed in the above embodiments, an image-rotating lens 200 coaxially disposed within the image-transferring sheath 1 included in the endoscopic working distance adaptive adjustable system 100, a dichroic mirror 400 disposed within the endoscope mounting 2 included in the endoscopic working distance adaptive adjustable system 100, and a light source 500.

[0076] The incident light (not shown) from the light source 500 is received by the mirror mount 2 and incident on the dichroic mirror 400. The light is reflected by the dichroic mirror 400 and then sequentially enters the image-rotating lens 200 and the imaging lens 5. The light is then focused onto the object W being measured by the imaging lens 5. The tissue surface of the object W reflects the light. The imaging lens 5 collects the reflected light emitted by the object W and forms an image. The image formed by the imaging lens 5 is then transmitted proportionally through the image-rotating lens 200. The reflected light passes through the dichroic mirror 400 and is captured by the endoscopic imaging system 1000, so that the operator (e.g., medical personnel or researchers) can observe the image of the organism.

[0077] Based on the endoscopic imaging system 1000 disclosed in the foregoing embodiments, this embodiment also discloses the application of the endoscopic imaging system, which uses the endoscopic imaging system 1000 as disclosed in the above embodiments to perform optical imaging of biological tissues (including living organisms or ex vivo biological tissues), thereby allowing operators (e.g., medical personnel or researchers) to observe the images of the biological organisms. Specific details can be found above and will not be repeated here.

[0078] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

[0079] 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.

[0080] 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. An adaptive adjustable working distance system for an endoscope, characterized in that, include: The image transmission mirror sheath includes a mirror mount disposed on the image side of the image transmission mirror sheath, a protective mirror sheath sleeved on the outside of the image transmission mirror sheath, and a working distance auxiliary adjustment system disposed between the protective mirror sheath and the mirror mount and / or between the protective mirror sheath and the image transmission mirror sheath. The mirror mount extends axially to form a support portion, and the imaging lens is disposed inside the image transmission mirror sheath away from the image side; The protective sheath includes: an outer sheath extending axially through the imaging lens, a sheath connecting portion partially sleeved on the outside of the support portion and connected to the outer sheath, and a protective lens disposed inside the object-side end of the outer sheath. The working distance auxiliary adjustment system is used to adjust the relative axial position between the imaging lens and the protective lens, and to maintain the working distance between the protective lens and the imaging lens; The working distance auxiliary adjustment system is configured as a first tight ring sleeved on the outside of the support portion; The outer periphery of the support portion forms at least a first guide portion, and the sheath connection portion is connected to the support portion via the first guide portion; When the sheath connection rotates axially relative to the support, the first guide guides the sheath connection to move axially so that after adjusting the axial position of the protective lens relative to the imaging lens, the first tightening ring is axially held between the sheath connection and the support.

2. The endoscope working distance adaptive adjustable system according to claim 1, characterized in that, After the protective sheath is fitted onto the support portion, a sealed space is formed between it and the image transmission sheath.

3. The endoscope working distance adaptive adjustable system according to claim 1, characterized in that, The first guide portion is configured as an external thread portion, and the inner circumference of the sheath connection portion is constructed to have an internal thread portion that engages with the external thread portion.

4. The endoscope working distance adaptive adjustable system according to claim 3, characterized in that, The sheath connection includes: a retaining portion for fixing the outer sheath, and an adjusting portion forming the internal thread to connect the support portion.

5. The endoscope working distance adaptive adjustable system according to claim 4, characterized in that, The mirror mount protrudes radially outward to form a protrusion that axially abuts against the first tightening ring, and the adjusting part axially abuts against the side of the first tightening ring opposite to the protrusion.

6. An endoscopic imaging system, characterized in that, include: The endoscope working distance adaptive adjustable system as described in any one of claims 1 to 5 includes an image-rotating lens coaxially disposed within the image-transmitting sheath of the endoscope working distance adaptive adjustable system, a dichroic mirror disposed within the endoscope mount of the endoscope working distance adaptive adjustable system, and a light source.

7. The application of an endoscopic imaging system, characterized in that, Optical imaging of biological tissues is performed using the endoscopic imaging system as described in claim 6.

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