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CN112168118B - Optical three-dimensional endoscope - Google Patents

Optical three-dimensional endoscope Download PDF

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Publication number
CN112168118B
CN112168118B CN202011069779.4A CN202011069779A CN112168118B CN 112168118 B CN112168118 B CN 112168118B CN 202011069779 A CN202011069779 A CN 202011069779A CN 112168118 B CN112168118 B CN 112168118B
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China
Prior art keywords
lens
light path
holes
protection window
objective lens
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Active
Application number
CN202011069779.4A
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Chinese (zh)
Other versions
CN112168118A (en
Inventor
王炳强
石强
孙之建
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Weigao Surgical Robot Co Ltd
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Shandong Weigao Surgical Robot Co Ltd
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Priority to CN202011069779.4A priority Critical patent/CN112168118B/en
Publication of CN112168118A publication Critical patent/CN112168118A/en
Application granted granted Critical
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064Constructional details of the endoscope body
    • A61B1/00071Insertion part of the endoscope body
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00112Connection or coupling means
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00112Connection or coupling means
    • A61B1/00119Tubes or pipes in or with an endoscope
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00131Accessories for endoscopes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00131Accessories for endoscopes
    • A61B1/00137End pieces at either end of the endoscope, e.g. caps, seals or forceps plugs
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00163Optical arrangements
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00163Optical arrangements
    • A61B1/00165Optical arrangements with light-conductive means, e.g. fibre optics
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00163Optical arrangements
    • A61B1/00193Optical arrangements adapted for stereoscopic vision
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/04Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/0661Endoscope light sources
    • A61B1/0676Endoscope light sources at distal tip of an endoscope
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/07Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements using light-conductive means, e.g. optical fibres

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Optics & Photonics (AREA)
  • Physics & Mathematics (AREA)
  • Biomedical Technology (AREA)
  • Medical Informatics (AREA)
  • Radiology & Medical Imaging (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biophysics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pathology (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
  • Endoscopes (AREA)

Abstract

The invention relates to an optical three-dimensional endoscope, which solves the technical problems of complex light path structure, high assembly difficulty and poor imaging effect of the existing three-dimensional endoscope and comprises a lens, a left objective lens protection window, a right objective lens protection window, an outer tube, an optical fiber bundle, a middle tube, inner tubes, a relay prism, a lens seat and a shell, wherein the lens is fixedly connected with the front end of the outer tube, two middle tubes are arranged in the outer tube, and two inner tubes are arranged in the two middle tubes; the two inner tubes are respectively provided with a left light path device and a right light path device, the left objective lens protection window and the right objective lens protection window are respectively connected with the lens, the rear end of the outer tube is inserted into the through hole of the shell, the lens base is fixedly connected with the shell, the front ends of the two middle tubes are respectively inserted into the two light path through holes of the lens, the rear ends of the two middle tubes are respectively inserted into the two through holes of the lens base, the front ends of the optical fiber bundles are arranged in the two illumination outlets of the lens, the rear ends of the optical fiber bundles are arranged in the light path holes of the lens base, and the relay prism is connected with the lens base. The invention is widely applied to the technical field of minimally invasive surgery.

Description

Optical three-dimensional endoscope
Technical Field
The invention relates to the technical field of medical instruments for minimally invasive surgery, in particular to an optical three-dimensional endoscope.
Background
In recent years, minimally invasive surgery has become more and more widely applied due to the characteristics of small wound, quick recovery and good effect, in the traditional endoscopic surgery, a doctor performs the surgery by observing a 2D image, the difficulty of the surgery operation is large due to the lack of stereoscopic impression, and the precision of the surgery operation is difficult to ensure. The three-dimensional endoscope can well solve the problems, so that the focus can be observed more visually, the operation time can be shortened, the pain of a patient is reduced, and the using requirements of doctors are met.
At present, three-dimensional endoscopes on the domestic market are few, the optical three-dimensional endoscope is more suitable for minimally invasive surgery due to the fact that the optical three-dimensional endoscope has a large depth of field range and a large field range, optical parts in the optical three-dimensional endoscope are many, the optical path structure is complex, the requirement on the machining size of the optical parts is high, the assembling difficulty is high, and the external imaging effect is poor, so that the endoscope which is compact in structure and simple in assembling process and ensures consistent and clear imaging is important for the field of minimally invasive surgery and is also important for a minimally invasive surgery robot.
Disclosure of Invention
The invention provides an optical three-dimensional endoscope with ingenious structure, simple assembly and good imaging effect, aiming at solving the technical problems of complex optical path structure, high assembly difficulty and poor imaging effect of the existing three-dimensional endoscope.
The invention provides an optical three-dimensional endoscope which comprises a lens, a left objective lens protection window, a right objective lens protection window, an outer tube, an optical fiber bundle, a middle tube, an inner tube, a left light path device, a right light path device, a relay prism, a lens base and a shell.
The lens is fixedly connected with the front end of the outer tube, the two middle tubes are symmetrically arranged in the outer tube in parallel along the axial direction, and the two inner tubes are respectively arranged in the two middle tubes; the left light path device and the right light path device are respectively arranged in the two inner pipes;
an inclined plane is arranged on the outer side of the lens, two parallel light path through holes are formed in the middle of the inclined plane of the lens, an upper illumination outlet and a lower illumination outlet are formed in the inclined plane of the lens, and the upper illumination outlet and the lower illumination outlet are located on two sides of the light path through holes;
the left objective lens protection window and the right objective lens protection window are respectively connected with the two light path through holes of the lens;
the shell is provided with a through hole, and the rear end of the outer tube is inserted into the through hole of the shell;
the lens base is fixedly connected with the shell and is provided with a prism chamber, a beam hole and two through holes; the front ends of the two middle pipes are respectively inserted into the two light path through holes of the lens, and the rear ends of the two middle pipes are respectively inserted into the two through holes of the lens base;
one part of the front end of the optical fiber bundle is arranged in the upper illumination outlet of the lens, and the other part of the front end of the optical fiber bundle is arranged in the lower illumination outlet; the rear end of the optical fiber bundle is arranged in a beam hole of the lens base;
the relay prism is connected to the prism chamber of the lens base.
Preferably, the sum of the areas of the upper illumination outlet and the lower illumination outlet is the same as the area of the beam opening of the mirror base.
Preferably, the left objective lens protection window and the right objective lens protection window are made of circular sapphire.
Preferably, the device also comprises a sealing cover, wherein the sealing cover is connected with the image rotating prism; the sealing cover is provided with two round holes.
The invention has the advantages of compact structure, small volume, small size and simple and quick assembly process. The imaging effect is good, and the imaging is consistent and clear.
Further features of the invention will be apparent from the description of the embodiments which follows.
Drawings
FIG. 1 is a schematic diagram of the overall construction of the optical three-dimensional endoscope of the present invention;
FIG. 2 is an exploded view of the optical three-dimensional endoscope of the present invention;
FIG. 3 is a view showing the structure of FIG. 1, in which a lens 1 is connected to an outer tube 2;
FIG. 4 is a schematic structural diagram of a lens;
FIG. 5 is a schematic structural view of the lens holder;
FIG. 6 is a schematic structural view of the lens holder;
FIG. 7 is a schematic structural view of the housing;
FIG. 8 is a schematic structural diagram of a left optical path device and a right optical path device;
FIG. 9 is a schematic view of the sealing cap;
FIG. 10 is a perspective view of a relay prism;
fig. 11 is a perspective view of the relay prism.
The symbols in the drawings illustrate that:
1. the optical lens comprises a lens, 2 an outer tube, 3 an outer shell, 4 a lens base, 5 a sealing cover, 6 a relay prism, 7 an optical fiber bundle, 8 a left objective lens protection window, 9 a left optical path device, 10 a middle tube and 11 an inner tube.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments thereof with reference to the attached drawings.
As shown in fig. 1 to 9, the optical three-dimensional endoscope provided by the present invention includes a left objective lens protection window 8, a right objective lens protection window, a lens 1, an optical fiber bundle 7, an outer tube 2, a middle tube 10, an inner tube 11, a left optical path device 9, a right optical path device, a relay prism 6, a lens holder 4, a housing 3, and a sealing cover 5.
The left objective lens protection window 8 and the right objective lens protection window are fixedly arranged on the lens 1, the right objective lens protection window and the left objective lens protection window 8 are identical in structure, and the two windows are arranged side by side. The front ends of the lens 1 and the outer tube 2 are welded together, the two middle tubes 10 are symmetrically arranged in the outer tube 2 in parallel along the axial direction of the lens body, the two inner tubes 11 are respectively arranged in the two middle tubes 10 (one inner tube is arranged in one middle tube 10), the left light path device 9 and the right light path device are respectively arranged in the two inner tubes 11 (one light path device is arranged in one inner tube 1), and the two light path devices are respectively provided with an imaging component, an image transmission component and a spacer ring. The optical path device may adopt a known structure in the prior art, for example, a corresponding structure disclosed in a utility model patent with a patent number of 201721646161.3, or a structure disclosed in an invention patent application with an application publication number of CN 105301757A.
The lens base 4 is welded with the shell 3, the relay prism 6 is connected with the lens base 4, and the sealing cover 5 is glued on the lens base 4.
One side of the lens 1 is a 30-degree inclined plane (not limited to 30 degrees, and the specific inclination can be set according to actual conditions), the other side is a vertical plane (the vertical plane is connected with the outer tube 2), two parallel and level light path through holes 1-1 are arranged in the middle of the inclined plane of the lens 1, and the diameter of each light path through hole 1-1 is consistent with the outer diameter of the middle tube 10. An upper illumination outlet 1-2 and a lower illumination outlet 1-3 are arranged on the inclined plane of the lens 1, and the upper illumination outlet 1-2 and the lower illumination outlet 1-3 are positioned at two sides of the light path through hole 1-1. The sum of the areas of the upper illumination outlet 1-2 and the lower illumination outlet 1-3 is the same as the area of the circular beam port 4-3 of the lens holder 4. Meanwhile, one part of the front end of the optical fiber bundle 7 is tightly plugged in the upper illumination outlet 1-2, the other part of the front end of the optical fiber bundle 7 is tightly plugged in the lower illumination outlet 1-3, the rear end of the optical fiber bundle is tightly plugged in the light beam hole 4-3, the optical fiber bundles in the upper illumination outlet 1-2 and the lower illumination outlet 1-3 are finally converged in the light beam hole 4-3 to be Y-shaped, and the optical fiber bundle 7 is fixed on the upper illumination outlet 1-2, the lower illumination outlet 1-3 and the light beam hole 4-3 by glue.
The front end of one middle tube 10 is inserted into a light path through hole 1-1 of the lens 1, and the rear end is inserted into a through hole 4-1 of the lens base 4. The front end of another middle tube 10 is inserted into another light path through hole 1-1 of the lens 1, and the rear end is inserted into a second through hole of the lens base 4. The outer tube 2 and the lens 1 are fixed together at the lap joint by welding or gluing, the rear ends of the two middle tubes 10 are flush with the bottom surface of the lens base 4, and the middle tubes 10 are fixed in the through holes of the lens base 4 by laser welding.
The vertical plane of the lens 1 is aligned with and concentric with the front end of the outer tube 2, and the lens 1 and the outer tube 2 are fixed together by laser welding at the joint, and the rear end of the outer tube 2 is inserted into the through hole 3-1 of the housing 3, and also fixed by laser welding at the joint.
The left objective lens protection window 8 and the right objective lens protection window are made of circular sapphire materials, the peripheries of the left objective lens protection window and the right objective lens protection window are plated with gold to form bonding pads, two light path through holes 1-1 of the lens 1 are provided with circular steps, the left objective lens protection window and the right objective lens protection window are arranged on the circular steps and are welded (in a soldering mode or in a gold-tin eutectic sealing mode) on the circular steps, and therefore fixing assembly is achieved.
The shell 3 is conical, a through hole 3-1 is arranged in the center, the shell 3 is welded with the lens base 4, and two through holes of the lens base 4 are respectively concentric with two light path through holes 1-1 of the lens 1 so as to ensure that the left light path device 9 and the right light path device 9 are flush.
The left light path device 9 and the right light path device are respectively arranged in the two inner tubes 11 and are mutually independent, the imaging component 9-1, the image transmission component 9-2 and the spacer ring 9-3 sequentially comprise an imaging component 9-1, the image transmission component 9-2 and the spacer ring 9-3 from an object end to an ocular end, the imaging component 9-1, the image transmission component 9-2 and the spacer ring 9-3 are tightly attached in the inner tubes 11, the relative positions in the two inner tubes 11 are kept consistent, the spacer ring 9-3 is adhered in the other end of the inner tube 11 and extends out of one part, one end of the spacer ring 9-3 is provided with a groove, the whole light path system can be rotated by rotating the spacer ring 9-3 to adjust the imaging component 9-1, so that the light path system is adjusted to an optimal position, and the two inner tubes 11 are adhered in the two middle tubes 10.
Two through holes 4-1 which are parallel and level are arranged above the lens base 4, a prism chamber 4-2 for placing the image rotating prism 6 is arranged below the through hole 4-1, the image rotating prism 6 is glued in the prism chamber 4-2, the axis of the through hole 4-1 is vertical to the upper surface of the image rotating prism 6, so that light rays emitted from the two through holes vertically enter the image rotating prism 6 and are vertically emitted from an emergent wafer of the image rotating prism 6 after being reflected, a light beam hole 4-3 is arranged beside the prism chamber 4-2, and the rear end of an optical fiber bundle 7 is concentrated and filled in the light beam hole 4-3. A thread is arranged on the periphery of the lens seat 4 and is used for being connected with the camera module, and a round step 4-4 is arranged on the upper surface of the lens seat 4, the diameter of the round step is consistent with the inner diameter of the shell 3 and is used for being welded and positioned with the shell 3.
The relay prism 6 is provided with two exit discs 6-1. The rotating image prism 6 is glued in the prism chamber 4-2 of the lens base 4, so that the transverse center line of the rotating image prism is parallel to the connecting line of the two through holes of the lens base 4, and the light rays emitted from the two emergent wafers 6-1 are flush.
The sealing cover 5 is a rectangular sheet and is provided with two round holes 5-1, the distance between the round holes is the same as that between two emergent wafers of the relay prism 6, and the sealing cover 5 is adhered to the relay prism 6 and the lens base 4 to play a role in sealing and protecting the left and right light path devices 9. The sealing cover 5 may be connected only to the relay prism 6.
The present invention and its embodiments have been described above schematically, and the description is not intended to be limiting, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art should be informed by the teachings of the present invention, other configurations of the components, the driving device and the connection means, which are similar to the technical solution and are not designed creatively, shall fall within the protection scope of the present invention without departing from the inventive spirit of the present invention.

Claims (1)

1. An optical three-dimensional endoscope is characterized by comprising a lens, a left objective lens protection window, a right objective lens protection window, an outer tube, an optical fiber bundle, a middle tube, an inner tube, a left light path device, a right light path device, a relay prism, a lens base, a space ring and a shell;
the lens is fixedly connected with the front end of the outer tube, the two middle tubes are symmetrically arranged in the outer tube in parallel along the axial direction, and the two inner tubes are respectively arranged in the two middle tubes; the left light path device and the right light path device are respectively arranged in the two inner pipes;
an inclined plane is arranged on the outer side of the lens, two parallel light path through holes are formed in the middle of the inclined plane of the lens, an upper illumination outlet and a lower illumination outlet are formed in the inclined plane of the lens, and the upper illumination outlet and the lower illumination outlet are located on two sides of the light path through holes;
the left objective lens protection window and the right objective lens protection window are respectively connected with the two light path through holes of the lens;
the shell is provided with a through hole, and the rear end of the outer tube is inserted into the through hole of the shell; the shell is conical;
the lens base is fixedly connected with the shell and is provided with a prism chamber, a beam hole and two through holes; the front ends of the two middle pipes are respectively inserted into the two light path through holes of the lens, and the rear ends of the two middle pipes are respectively inserted into the two through holes of the lens base;
the space ring is glued in the other end of the inner tube and extends out of one part of the inner tube, one end of the space ring is provided with a slot, and the whole optical path system can rotate by rotating the space ring;
one part of the front end of the optical fiber bundle is arranged in an upper illumination outlet of the lens, and the other part of the front end of the optical fiber bundle is arranged in a lower illumination outlet; the rear end of the optical fiber bundle is arranged in a beam hole of the lens base;
the rotating image prism is connected in a prism chamber of the lens base, and the outer circumference of the lens base is provided with threads;
the sum of the areas of the upper illumination outlet and the lower illumination outlet is the same as the area of a beam port of the lens base;
the optical three-dimensional endoscope also comprises a sealing cover, and the sealing cover is connected with the image rotating prism; the sealing cover is provided with two round holes;
the left objective lens protection window and the right objective lens protection window are made of circular sapphire materials.
CN202011069779.4A 2020-09-30 2020-09-30 Optical three-dimensional endoscope Active CN112168118B (en)

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CN112168118B true CN112168118B (en) 2023-02-03

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116671850B (en) * 2023-06-30 2024-06-18 北理工郑州智能科技研究院 Endoscope imaging assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10151105A (en) * 1996-11-25 1998-06-09 Olympus Optical Co Ltd Endoscope optical system
CN106618449A (en) * 2016-11-15 2017-05-10 天津大学 Three-dimensional endoscope device for minimally invasive neurosurgery robot
CN108634917A (en) * 2018-07-30 2018-10-12 鹰利视医疗科技有限公司 A kind of anti-smog device for rigid pipe endoscope
CN208798061U (en) * 2018-09-29 2019-04-26 广州希泰电子有限公司 A kind of monitoring camera of manual focusing
WO2019175044A1 (en) * 2018-03-16 2019-09-19 Olympus Winter & Ibe Gmbh Optical system of a stereo video endoscope and method for producing same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009049143B3 (en) * 2009-10-12 2010-12-30 Sopro-Comeg Gmbh Rigid, rod shaped endoscope for examining inner organ of patient, has magnet within inner space, where movement of inner hollow tubes against innermost hollow tube takes place by forces produced by magnet

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10151105A (en) * 1996-11-25 1998-06-09 Olympus Optical Co Ltd Endoscope optical system
CN106618449A (en) * 2016-11-15 2017-05-10 天津大学 Three-dimensional endoscope device for minimally invasive neurosurgery robot
WO2019175044A1 (en) * 2018-03-16 2019-09-19 Olympus Winter & Ibe Gmbh Optical system of a stereo video endoscope and method for producing same
CN108634917A (en) * 2018-07-30 2018-10-12 鹰利视医疗科技有限公司 A kind of anti-smog device for rigid pipe endoscope
CN208798061U (en) * 2018-09-29 2019-04-26 广州希泰电子有限公司 A kind of monitoring camera of manual focusing

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