Endoscope working distance self-adaptive adjustable system, endoscope imaging system and application

Abstract

The invention provides an endoscope working distance self-adaptive adjustable system, an endoscope imaging system and application. The endoscope working distance self-adaptive adjustable system comprises an image transmission lens sheath, a lens base, a protective lens sheath and a working distance auxiliary adjusting system arranged between the protective lens sheath and the lens base and / or arranged between the protective lens sheath and the image transmission lens sheath. The lens base protrudes in the axial direction to form a supporting part, and an imaging lens is arranged in the image transmitting lens sheath far away from the image side. The protective lens sheath comprises an outer sheath tube which axially extends out of the imaging lens, a sheath tube connecting part which partially sleeves the outer side of the supporting part and is connected with the outer sheath tube, and a protective lens which is arranged in the tail end of the object side of the outer sheath tube; the working distance auxiliary adjusting system is used for adjusting the relative axial position between the imaging lens and the protection lens and keeping the working distance between the protection lens and the imaging lens. By means of the working distance auxiliary adjusting system, the optimal object distance of the endoscope imaging system is achieved, and the microscopic imaging quality is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscopic microscopes, and in particular to an endoscope working distance adaptively adjustable system, an endoscope imaging system and applications. Background Art

[0002] Endoscopes are widely used in the field of medical diagnosis and treatment to observe and process tiny tissue structures. They provide doctors with cellular-level imaging support in the clinic, and provide a reliable basis for accurate judgment of lesions. Since endoscopes directly contact human tissues and present cellular-level images, the magnification is usually more than 1000 times. Therefore, any error of 0.1mm will cause significant image effects on the imaging effect. Therefore, it is very important to accurately keep the endoscope at the optimal working distance (i.e., the optimal imaging distance from the objective lens to the human tissue).

[0003] In the prior art, traditional endoscopes usually maintain the optimal working distance by fixing protective lenses or other adjustment structures. However, due to assembly tolerances, there may be slight differences in the working distance of the endoscope, making it difficult to achieve the optimal object distance, which directly affects the quality of microscopic imaging.

[0004] In view of this, it is necessary to improve the endoscopic microscope in the prior art to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to disclose an endoscope working distance adaptively adjustable system, an endoscope imaging system and its application, which are used to solve the many defects existing in the endoscopic microscope in the prior art, especially to achieve the optimal object distance of the endoscope imaging system and ensure the quality of microscopic imaging.

[0006] To achieve the above-mentioned object, in a first aspect, the present invention provides an endoscope working distance adaptively adjustable system, comprising: an image transmission mirror sheath, a mirror seat arranged 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 arranged between the protective mirror sheath and the mirror seat and / or between the protective mirror sheath and the image transmission mirror sheath;

[0007] The mirror seat protrudes along the axial direction to form a supporting portion, and an imaging lens is arranged inside the image transmission mirror sheath away from the image side;

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

[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 tightening ring sleeved on the outer side of the support portion;

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

[0012] When the sheath tube connection part rotates axially relative to the supporting part, the first guide part guides the sheath tube connection part to move axially, so that after adjusting the axial position of the protection lens relative to the imaging lens, the first tightening ring is axially supported between the sheath tube connection part and the supporting part.

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

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

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

[0016] As a further improvement of the present invention, the support portion is constructed with a limiting portion for limiting the axial rotation of the sheath tube connecting portion;

[0017] The working distance auxiliary adjustment system is configured as a movable cylinder partially sleeved on the outside of the sheath connection portion and rotatably connected to the lens holder;

[0018] A second guide portion is constructed on the inner circumference of the movable cylinder. When the movable cylinder rotates relative to the sheath tube connecting portion, the second guide portion guides the sheath tube connecting portion to axially displace along the support portion to adjust the axial position of the protection lens relative to the imaging lens.

[0019] As a further improvement of the present invention, the working distance auxiliary adjustment system is configured as a gasket ring that is axially supported between the imaging lens and the protective lens 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 mirror sheath is sleeved onto the supporting portion, a closed space is formed between the protective mirror sheath and the image transmitting mirror sheath.

[0021] As a further improvement of the present invention, the first guide portion is configured as an external thread portion, and an internal thread portion meshing with the external thread portion is constructed on the inner periphery of the sheath tube connecting portion.

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

[0023] As a further improvement of the present invention, the mirror seat is radially outwardly convex to form a protrusion that is axially abutted against the first tightening ring, and the adjustment portion is axially abutted against a side of the first tightening ring that is away from the protrusion.

[0024] As a further improvement of the present invention, the supporting portion is axially abutted against the second tightening ring, and the retaining portion is axially abutted against a side of the second tightening ring facing away from the supporting 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 tube connecting portion is constructed with an external thread portion meshing with the internal thread portion.

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

[0027] As a further improvement of the present invention, the movable cylinder includes: a fixed cylinder section fixedly connected to the bearing, and an adjusting cylinder section forming the internal threaded portion and sleeved on the outside of the sheath tube connecting portion.

[0028] As a further improvement of the present invention, the sheath tube connecting portion comprises: a holding portion for fixing the outer sheath tube, and an adjusting portion for forming the outer threaded portion;

[0029] The adjusting portion is configured with a movable groove that matches the outer contour of the supporting portion.

[0030] As a further improvement of the present invention, the working distance auxiliary adjustment system further comprises: a locking member which radially penetrates the tube wall of the adjustment barrel section to resist the sheath tube connection portion.

[0031] In a second aspect, the present invention further provides an endoscopic imaging system, comprising: an endoscope working distance adaptively adjustable system as described in any one of the first aspects, an image transfer lens disposed on the same optical axis in an image transmission mirror sheath contained in the endoscope working distance adaptively adjustable system, a dichroic mirror disposed in a mirror holder contained in the endoscope working distance adaptively adjustable system, and a light source.

[0032] In a third aspect, the present invention further provides an application of an endoscopic imaging system, using the endoscopic imaging system as described in any one of the second aspects to perform optical imaging of biological tissue.

[0033] Compared with the prior art, the beneficial effect of the present invention is that: in the process of debugging the optimal object distance, the axial position of the protection lens relative to the imaging lens is adjusted through the working distance auxiliary adjustment system to adjust the axial distance between the protection lens and the imaging lens, so that the relative position of the protection lens and the imaging lens is maintained within the optimal range, ensuring that the imaging lens and the protection lens are at the optimal working distance, thereby achieving the optimal object distance to ensure high-quality microscopic imaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is an overall schematic diagram of the endoscope working distance adaptively adjustable system disclosed in the present invention, wherein the working distance auxiliary adjustment system is configured as a first tightening ring sleeved on the outer side of the support portion;

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

[0036] Figure 3 A schematic diagram of a working distance auxiliary adjustment system configured as a movable cylinder partially sleeved on the outside of the sheath connection portion and rotatably connected to the lens holder;

[0037] Figure 4 A schematic diagram of a working distance auxiliary adjustment system configured as a gasket ring that is axially supported between an imaging lens and a protective lens;

[0038] Figure 5 for Figure 3 Sectional view along the arrow AA;

[0039] Figure 6 The figure is an overall schematic diagram of an endoscope imaging system including an endoscope working distance adaptively adjustable system disclosed in the present invention. DETAILED DESCRIPTION

[0040] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

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

[0042] It should be noted that in the following embodiments, the term "optical axis" refers to Figure 1 The term "axial direction" refers to the direction parallel to the optical axis Q. Figures 1 to 4 From the perspective shown, Figure 1 As shown, the direction of the measured object W 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 in vitro biological tissue.

[0043] Please refer to Figures 1 to 6 A specific implementation method of an endoscope working distance adaptively adjustable system, an endoscope imaging system and an application is disclosed.

[0044] like Figure 1 and Figure 4 As shown, the endoscope working distance adaptive adjustable system 100 can be installed in an optical detection device used for observing a biological body (including a living organism or an in vitro biological tissue), and the relative axial position between the imaging lens 5 and the protective lens 33 is adjusted by the working distance auxiliary adjustment system 4 to ensure the optimal working distance and the quality of microscopic imaging. Specifically, the optical detection device can be, for example, an endoscope. An endoscope is a tool for minimally invasive medical treatment of the human body, which is intended to enter the human body through a natural cavity of the human body or a small incision during surgery, and guide the endoscope into the biological tissue to be inspected to obtain the corresponding image of the biological tissue to be inspected for observation by medical personnel. At the same time, the applicant points out that in the following description, an endoscope is specifically used as an example for exemplary description. Of course, for example, it can also be a device used for flaw detection in the industrial field. This embodiment does not limit this, but the scope of protection of this application cannot be limited by this.

[0045] Ginseng Figures 1 to 4As shown, in this embodiment, the endoscope working distance adaptively adjustable system 100 includes: an image transmission mirror sheath 1, a lens seat 2 configured on the image side of the image transmission mirror sheath 1, a protective mirror sheath 3 sleeved on the outside of the image transmission mirror sheath 1, and a working distance auxiliary adjustment system 4 arranged between the protective mirror sheath 3 and the lens seat 2 and / or between the protective mirror sheath 3 and the image transmission mirror sheath 1; the lens seat 2 protrudes axially to form a support portion 21, and an imaging lens 5 is arranged inside the image transmission mirror sheath 1 away from the image side; the protective mirror 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 arranged 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] In the process of debugging the optimal object distance, the endoscope working distance adaptive adjustable system 100 adjusts the axial position of the protective lens 33 relative to the imaging lens 5 through the working distance auxiliary adjustment system 4 to adjust the axial distance between the protective lens 33 and the imaging lens 5, so that the relative position of the protective lens 33 and the imaging lens 5 is maintained within the optimal range, 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. After debugging is completed, the position of the adjusted protective lens 33 (relative to the position of the imaging lens 5) is fixed through the working distance auxiliary adjustment system 4 to ensure that after debugging is completed, the working distance between the protective lens 33 and the imaging lens 5 remains stable, avoiding changes in the working distance due to external factors (such as vibration or temperature changes), thereby maintaining the optimal object distance.

[0047] Compared with the endoscopic microscope in the prior art which has difficulty in achieving the optimal object distance due to assembly tolerances, the endoscope working distance adaptive adjustable system 100 maintains the relative position of the protective lens 33 and the imaging lens 5 within the optimal range through the adjustment mechanism of the working distance auxiliary adjustment system 4, so as to achieve the optimal object distance between the imaging lens 5 and the protective lens 33, thereby solving the problem that the prior art has difficulty in achieving the optimal object distance.

[0048] In some examples, reference Figure 1 As shown, the image transmission mirror sheath 1 is used to support and fix the imaging lens 5, so as to stably maintain the position of the imaging lens 5 after the working distance between the protection lens 33 and the imaging lens 5 is adjusted, and prevent the imaging lens 5 from being displaced by external factors during operation.

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

[0050] In some examples, reference Figure 1 As shown, the protective mirror sheath 3 is sleeved on the outer side of the image transmission mirror 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 to cover and protect the imaging lens 5. The support portion 21 is connected through the sheath tube connection portion 32 to ensure the stability of the protective mirror 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, reduce optical interference, reduce the interference of external light sources on the quality of microscopic imaging, and ensure the clarity and quality of microscopic imaging.

[0051] In some examples, reference Figure 1 As shown, the working distance auxiliary adjustment system 4 is used to accurately adjust the axial position between the imaging lens 5 and the protective lens 33, and adjust according to the actual assembly tolerance to ensure that the imaging lens 5 and the protective lens 33 are at the optimal working distance. After debugging is completed, the working distance between the imaging lens 5 and the protective lens 33 is measured by a high-precision optical measuring instrument (not shown) or other high-precision distance measuring instruments (not shown) to ensure that the working distance is within the optimal range. Afterwards, 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 in subsequent use to avoid changes due to external factors. After the fixation is completed, multiple verification tests can be performed to ensure that under different object distance conditions, the endoscope working distance adaptive adjustable system 100 can still provide clear and stable imaging effects.

[0052] In some examples, reference 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 part 21; the outer periphery of the support part 21 at least partially forms a first guide part, and the sheath connection part 32 is connected to the support part 21 via the first guide part; when the sheath connection part 32 rotates axially relative to the support part 21, the first guide part guides the sheath connection part 32 to move axially, so that after adjusting the axial position of the protection lens 33 relative to the imaging lens 5, the first tightening ring 41 is axially held between the sheath connection part 32 and the support part 21. By adjusting the thickness of the first tightening ring 41 in the axial direction, the axial distance between the protection lens 33 and the imaging lens 5 can be accurately adjusted, thereby achieving the optimal object distance.

[0053] During the debugging process, first fix the protective mirror sheath 3 to the supporting part 21 by rotating the sheath connection part 32. Then, the protective lens 33 is pressed against the surface of a living specimen (such as pig liver, pig kidney, etc.) to test the imaging effect. By rotating the sheath connection part 32, the first guide part guides the sheath connection part 32 to move axially, so as to synchronously drive the protective lens 33 in the outer sheath 31 to move axially. When a high-definition microscopic image is observed, stop rotating the sheath connection part 32 to maintain the best imaging state. Then, measure the distance D1 (such as 0.0045mm) between the end of the sheath connection part 32 and the mirror base 2 by a high-precision optical measuring instrument or other high-precision distance measuring instrument. Figure 1 ), select the first tightening ring 41 of appropriate thickness according to the measurement result, remove the protective mirror sheath 3 from the mirror base 2, sleeve the first tightening ring 41 of appropriate thickness selected on the outside of the support part 21 and abut against the mirror base 2, and then reinstall the protective mirror sheath 3 to the support part 21, so that the sheath tube connecting part 32 abuts against the first tightening ring 41, so that the imaging lens 5 and the protective lens 33 are at the best working distance, thereby achieving the best object distance to ensure high-quality microscopic imaging. Finally, check the imaging effect. If the image is blurred or unclear, select the first tightening ring 41 of the adjacent size for re-adjustment until the imaging achieves the best effect.

[0054] In some examples, the working distance auxiliary adjustment system 4 utilizes the thickness of the first tightening ring 41 to indirectly adjust the axial distance between the protective lens 33 and the imaging lens 5, thereby achieving precise control of the working distance between the protective lens 33 and the imaging lens 5 and preventing the working distance from changing 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, reference Figure 2 As shown, the working distance auxiliary adjustment system 4 is configured as a second tightening ring 42 sleeved on the outside of the image transmission mirror sheath 1; the outer periphery of the support part 21 at least partially forms a first guide part, and the sheath tube connection part 32 is connected to the support part 21 via the first guide part; when the sheath tube connection part 32 rotates axially relative to the support part 21, the first guide part guides the sheath tube connection part 32 to move axially, so that after adjusting the axial position of the protection lens 33 relative to the imaging lens 5, the second tightening ring 42 is axially held between the sheath tube connection part 32 and the support part 21. By adjusting the thickness of the second tightening ring 42 in the axial direction, the axial distance between the protection lens 33 and the imaging lens 5 can be accurately adjusted, thereby achieving the optimal object distance.

[0056] During the debugging process, first fix the protective mirror sheath 3 to the support part 21 by rotating the sheath connection part 32. Then, the protective lens 33 is pressed against the surface of a living specimen (such as pig liver, pig kidney, etc.) to test the imaging effect. By rotating the sheath connection part 32, the first guide part guides the sheath connection part 32 to move axially, so as to synchronously drive the axial movement of the protective lens 33 in the outer sheath 31. When a high-definition microscopic image is observed, stop rotating the sheath connection part 32 to maintain the best imaging state. Then, a high-precision optical measuring instrument or other high-precision distance measuring instrument is used to measure the distance D2 (such as the distance D2 between the sheath connection part 32 and the end of the support part 21 facing the object side) Figure 2 ), select a second tightening ring 42 of appropriate thickness according to the measurement result, remove the protective mirror sheath 3 from the mirror base 2, and sleeve the second tightening ring 42 of appropriate thickness selected on the outside of the image transmission mirror sheath 1 and abut against the end of the support part 21 facing the object side, and then reinstall the protective mirror sheath 3 to the support part 21, so that the sheath tube connecting part 32 abuts against the second tightening ring 42, so that the imaging lens 5 and the protective lens 33 are at the best working distance, thereby achieving the best object distance to ensure high-quality microscopic imaging. Finally, check the imaging effect. If the image is blurred or unclear, select a second tightening ring 42 of a similar size for re-adjustment until the imaging achieves the best effect.

[0057] In some examples, the working distance auxiliary adjustment system 4 utilizes the thickness of the second tightening ring 42 to indirectly adjust the axial distance between the protective lens 33 and the imaging lens 5, 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, reference Figure 1 and Figure 2 As shown, the first guide portion is configured as an external threaded portion, and the inner circumference of the sheath connection portion 32 is constructed with an internal threaded portion that meshes with the external threaded portion. Through the meshing of the external threaded portion (not shown) and the internal threaded portion (not shown), the sheath connection portion 32 can be accurately axially rotated on the support portion 21 to accurately control the axial displacement distance of the protective lens 33 driven by the sheath connection portion 32, so as to accurately adjust the working distance between the imaging lens 5 and the protective lens 33. And after the debugging is completed, the sheath connection portion 32 can be tightened by meshing the external threaded portion and the internal threaded portion, so that the sheath connection portion 32 is fixed on the support portion 21 to prevent the working distance between the imaging lens 5 and the protective lens 33 from changing due to external force or vibration during subsequent use.

[0059] In some examples, reference Figure 1 and Figure 2As shown, the sheath connection part 32 includes: a retaining part 321 for fixing the outer sheath 31, and an adjusting part 322 for forming an internal threaded part to connect the support part 21. The retaining part 321 is used to fix the outer sheath 31 in the sheath connection part 32, ensure the stability of the outer sheath 31, and prevent the outer sheath 31 from loosening or shifting during use. And by firmly fixing the outer sheath 31, other optical components (such as imaging lens 5 and protective lens 33) are indirectly protected, preventing external factors from affecting the optical components, and ensuring the stability and clarity of imaging. The adjusting part 322 is engaged with the external threaded part of the support part 21 through the internal threaded part, so that the sheath connection part 32 can be axially displaced relative to the support part 21, thereby adjusting the working distance between the imaging lens 5 and the protective lens 33. And it can also ensure that the sheath connection part 32 and the support part 21 are tightly connected after adjustment, fix the position of the adjusted protective lens 33, so that the adjusted working distance between the imaging lens 5 and the protective lens 33 remains stable and avoids changes due to external factors.

[0060] In some examples, reference Figure 1 As shown, the lens holder 2 is radially outwardly convexly provided with a protrusion 23 that axially abuts against the first tightening ring 41, and the adjusting portion 322 axially abuts against the side of the first tightening ring 41 that is opposite to the protrusion 23. The protrusion 23 provides stable axial support for the first tightening ring 41, so that the first tightening ring 41 can be fixed and withstand the axial pressure formed by the abutment of the adjusting portion 322 during the debugging process, ensuring that the first tightening ring 41 will not be offset or loosened during the working distance debugging process. The adjusting portion 322 axially abuts against the back side of the first tightening ring 41 (i.e., the side opposite to the protrusion 23), and finally the first tightening ring 41 is fixed on the supporting 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 the action of external force, so as to ensure that the imaging lens 5 and the protective lens 33 maintain a stable working distance, thereby ensuring the accuracy and long-term stability of the working distance adjustment.

[0061] In some examples, reference Figure 2As shown, the support portion 21 is axially supported against the second tightening ring 42, and the retaining portion 321 is axially supported against the side of the second tightening ring 42 that is opposite to the support portion 21. The retaining portion 321 is axially supported against the back side of the second tightening ring 42 (i.e., the side that is opposite to the support portion 21), and through cooperation with the support portion 21, the axial position of the second tightening ring 42 is stably fixed to ensure that the position of the second tightening ring 42 will not be loosened after the debugging is completed, and the second tightening ring 42 is prevented from being displaced due to external factors, thereby avoiding the deviation of the working distance. At the same time, under the joint support 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 the debugging is completed, the working distance between the imaging lens 5 and the protective lens 33 is stably maintained to avoid changes in the working distance due to external factors, thereby ensuring the quality of microscopic imaging.

[0062] In some examples, reference Figure 3 As shown, the support part 21 is constructed with a limit part 211 for limiting the axial rotation of the sheath connection part 32; the working distance auxiliary adjustment system 4 is configured as a movable cylinder 43 partially sleeved on the outside of the sheath connection part 32 and rotatably connected to the lens holder 2; the inner periphery of the movable cylinder 43 is constructed with a second guide part, and when the movable cylinder 43 rotates relative to the sheath connection part 32, the second guide part guides the sheath connection part 32 to move axially along the support part 21 to adjust the axial position of the protection lens 33 relative to the imaging lens 5. During the debugging process, the protection lens 33 is pressed against the surface of a living specimen (such as pig liver, pig kidney, etc.) to test the imaging effect. By rotating the movable cylinder 43, the second guide portion guides the sheath tube connection portion 32 to move along the support portion 21, so as to synchronously drive the protective lens 33 in the outer sheath tube 31 to move axially. When a high-definition microscopic image is observed, the movable cylinder 43 is stopped from rotating to maintain the best imaging state, so that the working distance between the imaging lens 5 and the protective lens 33 does not change, so that the imaging lens 5 and the protective lens 33 are at the best working distance, thereby achieving the best object distance to ensure high-quality microscopic imaging. In the process of rotating the movable cylinder 43, the second guide portion can guide the sheath tube connection portion 32 to move smoothly along the support portion 21, ensuring the stability and accuracy of the protective lens 33 in the axial movement relative to the imaging lens 5, so as to accurately adjust 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 of the protective lens 33 relative to the imaging lens 5 by rotating the movable cylinder 43, thereby accurately controlling 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 portion 211 can be configured as follows: Figure 5The limiting surface is formed by the concave arrangement on the outer periphery of the support portion 21 shown in the figure. The limiting surface prevents the sheath connection portion 32 from rotating, so as to ensure that the protective lens 33 in the outer sheath 31 is driven to move accurately along the predetermined axial path during the debugging process, and ensure the stability of the final working distance. The limiting portion 211 can also be configured as other structures that can limit the rotation of the sheath connection portion 32, and the present disclosure does not limit this.

[0065] In some examples, reference Figure 3 As shown, the second guide portion is configured as an internal thread portion, and the outer periphery of the sheath connection portion 32 is constructed with an external thread portion that meshes with the internal thread portion. Through the meshing of the internal thread portion (not shown) and the external thread portion (not shown), the axial displacement distance of the protective lens 33 relative to the imaging lens 5 can be accurately 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 accurately 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. And after the axial displacement distance of the protective lens 33 relative to the imaging lens 5 is adjusted, the adjusted position of the protective lens 33 is fixed by the meshing of the internal thread portion (not shown) and the external thread portion (not shown), so as to stably fix the adjusted working distance between the protective lens 33 and the imaging lens 5, and prevent the position of the protective lens 33 from changing due to external factors during subsequent use.

[0066] In some examples, reference Figure 3 As shown, the working distance auxiliary adjustment system 4 also includes: a bearing 44 disposed between the lens base 2 and the movable cylinder 43, and the movable cylinder 43 realizes axial rotation relative to the lens base 2 through the bearing 44. The bearing 44 is disposed between the lens base 2 and the movable cylinder 43, so that the movable cylinder 43 can perform smooth axial rotation when adjusting the working distance, reduce the friction and resistance of the movable cylinder 43 during the rotation process, make the movable cylinder 43 rotate more smoothly and stably, avoid resistance or jamming, thereby improving the efficiency of the working distance debugging process and ensuring the accuracy of the debugging process.

[0067] In some examples, reference Figure 3 As shown, the movable cylinder 43 includes: a fixed cylinder section 431 fixedly connected to the bearing 44, and an adjusting cylinder section 432 formed with an internal thread portion and sleeved on the outside of the sheath tube connection portion 32. The bearing 44 is connected to the fixed cylinder section 431 to provide stable rotation support for the movable cylinder 43 and maintain the stability of the debugging process. The adjusting cylinder section 432 is engaged with the external thread portion of the sheath tube connection portion 32 through its internal thread portion, and the working distance between the protective lens 33 and the imaging lens 5 is adjusted by rotating the adjusting cylinder section 432.

[0068] In some examples, reference Figure 3 and Figure 5As shown, the sheath connection part 32 includes: a retaining part 321 for fixing the outer sheath 31, and an adjusting part 322 forming an external threaded part; the adjusting part 322 is constructed with a movable groove 3221 that matches the outer contour of the support part 21. The retaining part 321 is used to fix the outer sheath 31 in the sheath connection part 32, ensure the stability of the outer sheath 31, and prevent the outer sheath 31 from loosening or deflecting during use. By matching the movable groove 3221 with the outer contour of the support part 21, the adjusting part 322 can move axially along the support part 21 to avoid rotation or radial displacement, so as to ensure the accuracy and stability of the lens 33 during the debugging process.

[0069] In some examples, reference Figure 3 As shown, the working distance auxiliary adjustment system 4 also includes: a locking member 45 that penetrates the tube wall of the adjustment barrel section 432 in the radial direction to abut against the sheath tube connection part 32. The locking member 45 penetrates the tube wall of the adjustment barrel section 432 in the radial direction to abut against the sheath tube connection part 32, thereby firmly fixing the adjusted position of the protection lens 33, preventing the relative position between the adjustment barrel section 432 and the sheath tube connection part 32 from accidentally shifting or loosening after debugging is completed, ensuring that during use, the working distance between the protection lens 33 and the imaging lens 5 is prevented from shifting due to external vibration, impact or operation. And the position of the adjustment barrel section 432 and the sheath tube connection part 32 is fixed by the locking member 45, further ensuring the long-term stability of the optimal working distance between the imaging lens 5 and the protection lens 33.

[0070] In some examples, reference Figure 4 As shown, the working distance auxiliary adjustment system 4 is configured as a gasket 46 that is axially supported 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 gasket 46 in the axial direction, the distance between the protective lens 33 and the imaging lens 5 is accurately adjusted to achieve the optimal object distance. During the debugging process, after the imaging lens 5 is installed in the image transmission mirror sheath 1, the working distance of the imaging lens 5 is optically detected. After the optimal working distance is determined, the difference between the protective lens 33 and the optimal working distance is measured by a high-precision optical measuring instrument or other high-precision distance measuring instrument, and then a gasket 46 of appropriate thickness is selected according to the measurement result, and the selected gasket 46 of appropriate thickness is installed in the outer sheath tube 31, and then the protective mirror sheath 3 is installed to the support portion 21, so that the gasket 46 is axially supported 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 to ensure high-quality microscopic imaging. Finally, check the imaging effect. If the image is blurry or unclear, select a gasket 46 of a similar size and debug again until the imaging reaches the best effect.

[0071] In some examples, the working distance auxiliary adjustment system 4 utilizes the thickness of the gasket 46 to indirectly adjust the axial distance between the protective lens 33 and the imaging lens 5, thereby achieving precise control of the working distance between the protective lens 33 and the imaging lens 5 and preventing the working distance from changing due to external factors or improper operation, so that the working distance between the protective lens 33 and the imaging lens 5 remains stable.

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

[0073] It should be noted that the intervals between the first tightening ring 41, the second tightening ring 42 and the gasket 46 of different thicknesses can be accurate to 0.01mm, and the movable cylinder 43 can also achieve an axial displacement accuracy of 0.01mm relative to the imaging lens 5 when the sheath connecting portion 32 is guided by the second guide portion to move axially along the supporting portion 21, so as to ensure the final working distance is accurately adjusted. For example, during the debugging process, the optimal working distance has been determined and preliminarily measured, and the first tightening ring 41 (or the second tightening ring 42, the gasket 46) of appropriate thickness has been selected and installed in the endoscope working distance adaptive adjustable system 100. At this time, the working distance is close to the ideal value, but under high-precision measurement, if there is still an error of 0.01mm, a new first tightening ring 41 with a thickness of ±0.01mm of the original first tightening ring 41 can be selected and reinstalled in the endoscope working distance adaptive adjustable system 100 to accurately adjust the working distance and achieve the optimal object distance.

[0074] Based on the technical solutions of any of the above-mentioned endoscope working distance adaptively adjustable systems 100 disclosed in the aforementioned embodiments and their reasonable combinations, this embodiment further discloses an endoscope imaging system 1000.

[0075] Ginseng Figure 6As shown, the endoscope imaging system 1000 includes: the endoscope working distance adaptive adjustable system 100 as disclosed in the above embodiment, an image transfer lens 200 coaxially arranged in the image transmission mirror sheath 1 included in the endoscope working distance adaptive adjustable system 100, a dichroic mirror 400 arranged in the mirror base 2 included in the endoscope working distance adaptive adjustable system 100, and a light source 500.

[0076] The incident light (not shown) from the receiving light source 500 is incident on the dichroic mirror 400 through the mirror base 2, is reflected by the dichroic mirror 400 and sequentially enters the image transfer lens 200 and the imaging lens 5, and then converges on the object W to be measured through the imaging lens 5. The tissue surface of the object W to be measured forms light reflection, and the imaging lens 5 collects and images the reflected light emitted by the object W to be measured, and then the image formed by the imaging lens 5 is proportionally transmitted through the image transfer lens 200. The reflected light passes through the dichroic mirror 400 to be captured by the endoscopic imaging system 1000, and then is provided for operators (for example, medical personnel or scientific researchers) to observe the image of the organism.

[0077] Based on the endoscopic imaging system 1000 disclosed in the above embodiment, this embodiment also discloses the application of the endoscopic imaging system, using the endoscopic imaging system 1000 disclosed in the above embodiment to perform optical imaging of biological tissue (including living organisms or ex vivo biological tissues), so as to allow operators (for example, medical personnel or scientific researchers) to observe the biological image. For details, please refer to the above, which will not be repeated here.

[0078] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

[0079] It will be apparent to those skilled in the art that the 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 the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0080] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An endoscope working distance adaptive adjustable system, characterized in that: include: An image transmission mirror sheath, a mirror seat arranged 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 arranged between the protective mirror sheath and the mirror seat and / or between the protective mirror sheath and the image transmission mirror sheath; The mirror seat protrudes along the axial direction to form a supporting portion, and an imaging lens is arranged inside the image transmission mirror sheath away from the image side; The protective lens sheath comprises: an outer sheath tube extending axially through the imaging lens, a sheath tube connecting portion partially sleeved outside the support portion and connected to the outer sheath tube, and a protective lens disposed inside the object side end of the outer sheath tube; 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.

2. The endoscope working distance adaptive adjustable system according to claim 1, characterized in that: The working distance auxiliary adjustment system is configured as a first tightening ring sleeved on the outer side of the support portion; The outer periphery of the support portion at least partially forms a first guide portion, and the sheath tube connection portion is connected to the support portion via the first guide portion; When the sheath tube connection part rotates axially relative to the supporting part, the first guide part guides the sheath tube connection part to move axially, so that after adjusting the axial position of the protection lens relative to the imaging lens, the first tightening ring is axially supported between the sheath tube connection part and the supporting part.

3. The endoscope working distance adaptive adjustable system according to claim 1, characterized in that: The working distance auxiliary adjustment system is configured as a second tightening ring sleeved on the outside of the image transmission mirror sheath; The outer periphery of the support portion at least partially forms a first guide portion, and the sheath tube connection portion is connected to the support portion via the first guide portion; When the sheath tube connection part rotates axially relative to the supporting part, the first guide part guides the sheath tube connection part to move axially, so that after adjusting the axial position of the protection lens relative to the imaging lens, the second tightening ring is axially supported between the sheath tube connection part and the supporting part.

4. The endoscope working distance adaptive adjustable system according to claim 1, characterized in that: The support portion is configured with a limiting portion for limiting the axial rotation of the sheath tube connecting portion; The working distance auxiliary adjustment system is configured as a movable cylinder partially sleeved on the outside of the sheath connection portion and rotatably connected to the lens holder; A second guide portion is constructed on the inner circumference of the movable cylinder. When the movable cylinder rotates relative to the sheath tube connecting portion, the second guide portion guides the sheath tube connecting portion to axially displace along the support portion to adjust the axial position of the protection lens relative to the imaging lens.

5. The endoscope working distance adaptive adjustable system according to claim 1, characterized in that: The working distance auxiliary adjustment system is configured as a gasket that is axially supported between the imaging lens and the protective lens to adjust the axial position of the protective lens relative to the imaging lens.

6. The endoscope working distance adaptively adjustable system according to any one of claims 1 to 5, characterized in that: After the protective mirror sheath is sleeved onto the supporting portion, a closed space is formed between the protective mirror sheath and the image transmission mirror sheath.

7. The endoscope working distance adaptively adjustable system according to claim 2 or 3, characterized in that: The first guide portion is configured as an external thread portion, and an internal thread portion meshing with the external thread portion is configured on the inner periphery of the sheath tube connecting portion.

8. The endoscope working distance adaptive adjustable system according to claim 7, characterized in that: The sheath tube connecting portion includes: a holding portion for fixing the outer sheath tube, and an adjusting portion forming the internal thread portion to connect to the supporting portion.

9. The endoscope working distance adaptive adjustable system according to claim 2, characterized in that: The mirror seat is radially outwardly protruded to form a protrusion that is axially abutted against the first tightening ring, and the adjustment portion is axially abutted against a side of the first tightening ring that is away from the protrusion.

10. The endoscope working distance adaptive adjustable system according to claim 8, characterized in that: The supporting portion is axially abutted against the second tightening ring, and the retaining portion is axially abutted against a side of the second tightening ring facing away from the supporting portion.

11. The endoscope working distance adaptively adjustable system according to claim 4, characterized in that: The second guide portion is configured as an internal thread portion, and an external thread portion meshing with the internal thread portion is configured on the outer periphery of the sheath tube connecting portion.

12. The endoscope working distance adaptively adjustable system according to claim 11, characterized in that: The working distance auxiliary adjustment system further includes: a bearing arranged between the lens seat and the movable cylinder, and the movable cylinder realizes axial rotation relative to the lens seat through the bearing.

13. The endoscope working distance adaptively adjustable system according to claim 12, characterized in that: The movable cylinder comprises: a fixed cylinder section fixedly connected to the bearing, and an adjusting cylinder section forming the internal threaded portion and sleeved on the outer side of the sheath tube connecting portion.

14. The endoscope working distance adaptively adjustable system according to claim 12, characterized in that: The sheath tube connection portion includes: a holding portion for fixing the outer sheath tube, and an adjusting portion forming the external thread portion; The adjusting portion is configured with a movable groove that matches the outer contour of the supporting portion.

15. The endoscope working distance adaptively adjustable system according to claim 13, characterized in that: The working distance auxiliary adjustment system further comprises: a locking member which penetrates through the tube wall of the adjustment barrel section in the radial direction to resist the sheath tube connection part.

16. An endoscopic imaging system, characterized in that: include: An endoscope adaptive working distance system as described in any one of claims 1 to 15, an image transfer lens of an image transmission mirror sheath contained in the endoscope adaptive working distance system, a dichroic mirror of a mirror holder contained in the endoscope adaptive working distance system, and a light source are arranged on the same optical axis.

17. Application of an endoscopic imaging system, characterized in that: The endoscopic imaging system according to claim 16 is used to perform optical imaging of biological tissue.

Images