3D electronic endoscope and assembling method thereof
The 3D electronic endoscope addresses dizziness issues by incorporating blackened objective lenses and light blocking sheets to enhance focusing accuracy and reduce stray light, resulting in improved image quality and surgical efficiency.
Patent Information
- Application Number
- CN202411199203.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2024-12-06
AI Technical Summary
Existing 3D electronic hard endoscopes cause dizziness due to binocular focusing accuracy and stray light issues, affecting surgical efficiency and safety.
A 3D electronic endoscope design with a specific structural configuration, including a hard tube, front end base, imaging module, and optical fiber module, featuring blackened objective lenses, light blocking sheets, and anti-reflection coated sapphire lenses to reduce stray light and improve focusing accuracy.
The design reduces dizziness and improves image quality by minimizing stray light and enhancing binocular focusing accuracy, thereby improving surgical efficiency and safety.
Smart Images
Figure CN119073867A_ABST
Abstract
Description
Technical field:
[0001] The invention belongs to the technical field of medical devices, and in particular relates to a 3D electronic endoscope and an assembly method thereof. Background technology:
[0002] With the development of science and technology, the application of endoscopes in the medical industry is becoming more and more popular. It can provide the most intuitive understanding of the lesions inside the body and can be used with micro-scalpels for minimally invasive surgery. Compared with traditional surgery, endoscopic minimally invasive surgery has the advantages of less trauma, faster recovery, less pain, and fewer complications, and is favored by a large number of medical institutions and patients.
[0003] With the maturity of 3D technology, 3D electronic hard endoscopes came into being. 3D electronic hard endoscopes can provide stereoscopic images, allowing doctors to more accurately judge tissue structure and depth, thereby improving the accuracy and safety of surgery; at the same time, the stereoscopic images of 3D electronic hard endoscopes can more realistically reflect the internal conditions of the human body, reduce the visual fatigue and cognitive burden of doctors during surgery, and improve surgical efficiency. However, existing 3D electronic hard endoscopes often cause dizziness, thus affecting the progress of the operation. For this reason, how to reduce or eliminate the adverse phenomenon of 3D electronic hard endoscopes causing dizziness has become a technical problem that needs to be solved urgently, and this case is the result of this. Summary of the invention:
[0004] The present invention makes improvements to the problems existing in the above-mentioned prior art, that is, the technical problem to be solved by the present invention is to provide a 3D electronic endoscope and an assembly method thereof.
[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a 3D electronic endoscope, comprising a hard tube and a front end base arranged at the front end of the hard tube, the front end of the front end base is provided with a bevel, the middle of the bevel is provided with a lens light window, and the upper and lower sides of the lens light window are respectively provided with light source light windows; an imaging module and an optical fiber module are arranged inside the front end base, the imaging module comprises two objective lenses distributed on the left and right and with parallel main optical axes, and the lens ends of the two objective lenses are directly opposite to the lens light window; the optical fiber modules are a pair, a pair of optical fiber modules are distributed on the upper and lower sides of the imaging module, and the optical fiber end faces of a pair of optical fiber modules are in close contact with the light source light window.
[0006] Furthermore, the imaging module also includes a lens fixing seat and an image sensor, the lens fixing seat is provided with a pair of lens mounting holes distributed on the left and right, and a sensor mounting groove is provided at the rear end of the lens fixing seat; a pair of objective lenses are respectively installed in the pair of lens mounting holes, and the image sensor is installed in the sensor mounting groove.
[0007] Furthermore, the objective lens is a lens with a viewing angle of 30°, and the objective lens is blackened except for the light aperture surface.
[0008] Furthermore, the material of the objective lens is black PC.
[0009] Furthermore, notches for clamping the lens for image adjustment are provided at both the upper and lower ends of the side portion around the lens mounting hole.
[0010] Furthermore, a mounting groove for installing a lens fixing seat is provided inside the front end base, and two lens through holes distributed on the left and right and used to accommodate the objective lens are provided at the center of the inclined surface. The two lens through holes are connected to the mounting groove, and a first light window mounting groove is provided around the front ends of the two lens through holes, and the lens light window is installed in the first light window mounting groove.
[0011] Furthermore, optical fiber through holes are respectively provided at the upper and lower ends of the front end base, and the optical fiber through holes include a front section through hole and a rear section through hole, the axis of the front section through hole is perpendicular to the inclined plane, and the axis of the rear section through hole is parallel to the axis of the front end base; a second light window mounting groove is provided around the front end of the optical fiber through hole, and the light source window is installed in the second light window mounting groove.
[0012] Furthermore, a light blocking sheet is arranged between the imaging module and the lens light window, and two ends of the light blocking sheet are respectively in close contact with the lens light window and the lens end surface of the imaging module.
[0013] Furthermore, the light blocking sheet is a circular black Mylar sheet.
[0014] Furthermore, the light source window and the lens window are both sapphire lenses, and the interior of the lens window is coated with an anti-reflection film.
[0015] Compared with the prior art, the present invention has the following effects: the present invention has a reasonable structural design, and through the cooperation of an independent imaging module with two optical fiber modules, the binocular focusing accuracy is improved, stray light is reduced, and image quality is improved, thereby reducing or eliminating the adverse phenomenon of dizziness caused directly or indirectly by binocular focusing accuracy and stray light. Description of the drawings:
[0016] Figure 1 is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;
[0017] Figure 2 1 is a schematic diagram of a front cross-sectional structure of an embodiment of the present invention;
[0018] Figure 3 yes Figure 2 A is an enlarged schematic diagram;
[0019] Figure 4is a schematic diagram of the three-dimensional structure of an imaging module in an embodiment of the present invention;
[0020] Figure 5 Schematic diagram of the three-dimensional structure of the front end base in the embodiment of the present invention Figure 1 ;
[0021] Figure 6 Schematic diagram of the three-dimensional structure of the front end base in the embodiment of the present invention Figure 2 .
[0022] In the figure:
[0023] 1-front end base; 2-light source window; 3-lens window; 4-hard tube; 5-imaging module; 6-optical fiber module; 7-light shield; 8-objective lens; 9-lens fixing seat; 10-image sensor; 11-lens mounting hole; 12-slot; 13-mounting groove; 14-lens through hole; 15-first light window mounting groove; 16-optical fiber through hole; 17-second light window mounting groove; 18-inclined surface. Specific implementation method:
[0024] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0025] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0026] like Figures 1 to 6 As shown, a 3D electronic endoscope of the present invention has a viewing angle of 30°, specifically including a hard tube 4, a front end base 1, an imaging module 5 and an optical fiber module 6, the front end base 1 is arranged at the front end of the hard tube 4, the front end of the front end base 1 is provided with an inclined surface 18, a lens light window 3 is arranged in the middle of the inclined surface 18, and the upper and lower sides of the lens light window 3 are respectively provided with a light source light window 2; the interior of the front end base 1 is provided with an imaging module 5 and an optical fiber module 6, the imaging module 5 includes two objective lenses 8 distributed on the left and right and parallel to the main optical axis, and the lens ends of the two objective lenses 8 are directly opposite to the lens light window 3; the optical fiber module 6 is a pair, a pair of optical fiber modules 6 are distributed on the upper and lower sides of the imaging module 5, and the optical fiber end faces of a pair of optical fiber modules 6 are in close contact with the light source light window 2. The structure is reasonable, relatively easy to assemble, and has high assembly accuracy, high production efficiency, and can fully meet the needs of production cost reduction.
[0027] In this embodiment, the imaging module 5 also includes a lens fixing seat 9 and an image sensor 10. The lens fixing seat is in the shape of a rectangular parallelepiped. The lens fixing seat 9 is provided with a pair of lens mounting holes 11 distributed on the left and right, and a sensor mounting groove is provided at the rear end of the lens fixing seat 11; a pair of objective lenses 8 are respectively installed in the pair of lens mounting holes 11, and the front end of the objective lens extends out of the lens mounting hole. The image sensor 10 is installed in the sensor mounting groove, and the distance between the objective lens 8 and the image sensor 10 is determined by adjusting the image.
[0028] In this embodiment, the main optical axes of the two objective lenses 8 are parallel and have the same viewing angle. Further, the objective lens is a lens with a viewing angle of 30°.
[0029] In this embodiment, the objective lens 8 is blackened except for the light-transmitting surface to reduce the influence of stray light.
[0030] In this embodiment, the material of the objective lens 8 is black PC to reduce the influence of stray light.
[0031] In this embodiment, notches 12 for clamping the lens for image adjustment are provided at both the upper and lower ends of the side of the lens mounting hole 11 .
[0032] In this embodiment, the front end base 1 is cylindrical in shape, and a mounting groove 13 for mounting the lens fixing seat 9 is provided inside the front end base 1. The circumferential dimension of the mounting groove is adapted to the outer dimension of the lens fixing seat 9, and the end section is a circular countersunk hole for assembly avoidance of the imaging module 5. Two lens through holes 14 are provided at the center of the inclined surface 18, which are distributed on the left and right and are used to accommodate the objective lens 8. The inner diameter of the lens through hole is larger than the outer diameter of the objective lens, and is used to avoid the objective lens 8. The two lens through holes 14 are connected to the mounting groove, and a first light window mounting groove 15 is provided around the front ends of the two lens through holes 14, and the lens light window 3 is installed in the first light window mounting groove 15.
[0033] In this embodiment, a glue storage groove is provided on the peripheral side of the first light window installation groove 15 to facilitate glue fixation.
[0034] In this embodiment, optical fiber through holes 16 are respectively provided at the upper and lower ends of the inclined surface 18 of the front end base 1, and the optical fiber through hole 16 includes a front section through hole and a rear section through hole. The axis of the front section through hole is perpendicular to the inclined surface, and after a circular arc transition, the axis of the rear section through hole is parallel to the axis of the front end base; a second light window mounting groove 17 is provided around the front end of the optical fiber through hole 16, and the light source window 2 is installed in the second light window mounting groove 17.
[0035] In this embodiment, the rear end of the front end base 1 and the front end of the hard tube are both provided with assembly stoppers to facilitate assembly and close fit of the two.
[0036] In this embodiment, a light shielding sheet 7 is provided between the imaging module 5 and the lens light window 3, and the two ends of the light shielding sheet 7 are respectively in close contact with the lens light window 3 and the lens end surface of the imaging module 5. Preferably, the light shielding sheet is a circular black Mylar sheet, which is used to block excess light and reduce the influence of stray light.
[0037] In this embodiment, the light source window 2 is a rectangular sapphire lens.
[0038] In this embodiment, the lens light windows 3 are all sapphire lenses, and the interior of the lens light windows 3 is coated with an anti-reflection film to reduce the influence of stray light.
[0039] In this embodiment, the image sensor 10 is a device with two CCDs on the same PCB.
[0040] In this embodiment, the hard tube 4 is a seamless steel tube.
[0041] It should be noted that a viewing angle of 15° to 70° can be designed according to the viewing angle requirements of the endoscope.
[0042] In this embodiment, the assembly sequence of the 3D electronic endoscope is:
[0043] Step S1: fix the image sensor 10 in the sensor mounting groove at the rear end of the lens fixing seat 9 with glue, and then install and adjust the two objective lenses 8 respectively and fix them with glue;
[0044] Step S2: Apply glue to the first and second light window installation grooves of the front base 1 respectively, install the light source light window 2 and the lens light window 3, cure, and clean;
[0045] Step S3: Install the light shielding sheet 7 in the lens mounting hole, with one end close to the lens light window 3, and then install the imaging module 5 in the mounting groove of the front base 1, with the lens bevel of the imaging module 5 close to the light shielding sheet 7, and fix them with glue;
[0046] Step S4: Install the optical fiber module 6 in the optical fiber through hole of the front base 1, and make the optical fiber end face of the optical fiber module closely attached to the optical fiber window 2, and fix them with glue;
[0047] Step S5: Finally, the hard tube 4 is put on the outer circle assembly position of the front end base 1 and welded.
[0048] The advantages of the present invention are: by adjusting the image quickly and with high precision through the independent imaging module, the light window and the front base are fixed by glue and can be quickly installed in place, the light shield is close to the lens light window and the imaging module, and is easy to assemble and position, and the front base and the hard tube are assembled by the stopper, which is easy to install and position. In general, the present invention has a reasonable structure, is relatively easy to assemble and has a high binocular focusing accuracy, and effectively reduces the adverse phenomenon of dizziness by reducing stray light.
[0049] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except when it is obviously impossible to use an one-piece molding process).
[0050] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the present invention include states or shapes that are approximate, similar, or close to them.
[0051] Any component provided by the present invention may be assembled from a plurality of separate components, or may be a separate component manufactured by an integral forming process.
[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.
Claims
1. A 3D electronic endoscope, comprising a hard tube and a front end base arranged at the front end of the hard tube, characterized in that: The front end of the front end base is provided with a slope, a lens light window is provided in the middle of the slope, and light source light windows are provided on the upper and lower sides of the lens light window respectively; an imaging module and an optical fiber module are provided inside the front end base, and the imaging module includes two objective lenses distributed on the left and right and with parallel main optical axes, and the lens ends of the two objective lenses are directly opposite to the lens light window; the optical fiber modules are a pair, and a pair of optical fiber modules are distributed on the upper and lower sides of the imaging module, and the optical fiber end faces of a pair of optical fiber modules are in close contact with the light source light window.
2. The 3D electronic endoscope according to claim 1, characterized in that: The imaging module also includes a lens fixing seat and an image sensor. The lens fixing seat is provided with a pair of lens mounting holes distributed on the left and right, and a sensor mounting groove is provided at the rear end of the lens fixing seat; a pair of objective lenses are respectively installed in the pair of lens mounting holes, and the image sensor is installed in the sensor mounting groove.
3. The 3D electronic endoscope according to claim 1 or 2, characterized in that: The objective lens is a lens with a viewing angle of 30°, and the objective lens is blackened except for the light aperture surface.
4. The 3D electronic endoscope according to claim 1 or 2, characterized in that: The material of the objective lens is black PC.
5. The 3D electronic endoscope according to claim 2, characterized in that: The upper and lower ends of the side portion around the lens mounting hole are both provided with notches for clamping the lens for image adjustment.
6. The 3D electronic endoscope according to claim 2, characterized in that: A mounting groove for mounting a lens fixing seat is provided inside the front end base, and two lens through holes distributed on the left and right and used to accommodate the objective lens are provided at the center of the inclined surface. The two lens through holes are connected to the mounting groove, and a first light window mounting groove is provided around the front ends of the two lens through holes, and the lens light window is installed in the first light window mounting groove.
7. The 3D electronic endoscope according to claim 1, characterized in that: Fiber optic through holes are respectively arranged at the upper and lower ends of the front end base, and the fiber optic through holes include a front section through hole and a rear section through hole, the axis of the front section through hole is perpendicular to the inclined plane, and the axis of the rear section through hole is parallel to the axis of the front end base; a second light window mounting groove is arranged around the front end of the fiber optic through hole, and the light source window is mounted in the second light window mounting groove.
8. The 3D electronic endoscope according to claim 1, characterized in that: A light blocking sheet is arranged between the imaging module and the lens light window, and two ends of the light blocking sheet are respectively in close contact with the lens light window and the lens end surface of the imaging module.
9. The 3D electronic endoscope according to claim 8, characterized in that: The light blocking sheet is a circular black Mylar sheet.
10. The 3D electronic endoscope according to claim 1, characterized in that: The light source window and the lens window are both sapphire lenses, and the interior of the lens window is coated with an anti-reflection film.