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WO2018207539A1 - Endoscope - Google Patents

Endoscope Download PDF

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Publication number
WO2018207539A1
WO2018207539A1 PCT/JP2018/015245 JP2018015245W WO2018207539A1 WO 2018207539 A1 WO2018207539 A1 WO 2018207539A1 JP 2018015245 W JP2018015245 W JP 2018015245W WO 2018207539 A1 WO2018207539 A1 WO 2018207539A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical system
center
endoscope
illumination optical
illumination
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/015245
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English (en)
Japanese (ja)
Inventor
小竿明彦
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.)
Olympus Corp
Original Assignee
Olympus Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Olympus Corp filed Critical Olympus Corp
Publication of WO2018207539A1 publication Critical patent/WO2018207539A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments 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
    • A61B1/06—Instruments 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
    • A61B1/07—Instruments 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/26—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes using light guides

Definitions

  • the present invention relates to an endoscope.
  • electronic endoscopes in the medical field treatment of minimally invasive lesions using an endoscope has been performed with the improvement of treatment ability in addition to improvement of diagnosis ability. Therefore, electronic endoscopes in the medical field are required to have an observation system and an illumination system that can ensure a good field of view both during observation and during treatment. For example, the following are known as endoscopes that can easily guide the treatment tool and endoscopes that control contrast.
  • JP 2001-13422 A Japanese Patent No. 5636922
  • TUL transurethral lithotripsy
  • an endoscope for example, a soft ureteroscope
  • Dusting is a technique in which stones are pulverized with a laser or the like and discharged outside the body. In this procedure, debris can be removed from the body by perfusion, so stones can be easily discharged and left behind.
  • the field of view may deteriorate due to the scattering of the illumination light to the powdered calculus.
  • an endoscope used for TUL it is necessary to design an optimal illumination system and observation system in consideration of this case.
  • the present invention has been made in view of the above, and an object of the present invention is to provide an endoscope capable of maintaining a good visual field when dusting in TUL.
  • an endoscope has an illumination optical system and an imaging optical system at the distal end, and the following conditions The expression (1) is satisfied.
  • L LI includes a center O L, the distance between the center O IM
  • OL is the center of the illumination optical system closest to the imaging optical system
  • O IM the center of the imaging optical system
  • L O is the observation distance of the object
  • f L is the absolute value of the focal length of the illumination optical system
  • ⁇ L is the beam diameter of illumination light incident on the illumination optical system from the light source side, It is.
  • the present invention has an effect of providing an endoscope that can maintain a good visual field during dusting in TUL.
  • (A) is a figure showing the tip composition which looked at the endoscope concerning an embodiment from the object side.
  • B) is a figure which shows the structure of the light-emitting body vicinity.
  • C) is sectional drawing which shows the front-end
  • D) is another figure which shows the structure of the light-emitting body vicinity.
  • E) is another sectional view showing the tip configuration of the endoscope according to the embodiment.
  • (A) is a figure which shows the structure and optical path of the light-emitting body vicinity of the endoscope which concerns on embodiment.
  • B) is a figure explaining the parameter of the endoscope concerning an embodiment.
  • (C) is another figure which shows the structure of the light-emitting body vicinity of the endoscope which concerns on embodiment, and an optical path.
  • (D) is another figure explaining the parameter of the endoscope concerning an embodiment. It is another sectional view showing the tip composition of the endoscope concerning an embodiment.
  • (A) is a figure which shows the front-end
  • FIG. 7B is a diagram illustrating a distal end configuration of the endoscope according to the third embodiment when viewed from the object side.
  • (C) is a diagram illustrating a distal end configuration of the endoscope according to the fourth embodiment when viewed from the object side.
  • (D) is a diagram showing a distal end configuration of the endoscope according to Examples 5, 6, and 7 when viewed from the object side.
  • FIG. 1A is a diagram illustrating a distal end configuration of the endoscope 100 according to the embodiment as viewed from the object side.
  • the endoscope 100 includes an illumination optical system 101 and an imaging optical system 102 at a distal end portion, and satisfies the following conditional expression (1).
  • f L is the absolute value of the focal length f L of the illumination optical system 101
  • ⁇ L is the luminous flux diameter of the illumination light IL incident on the illumination optical system 101 from the light source side (the light emitter 105 side), It is.
  • the observation distance L O to the object OBJ is preferably an “average distance”.
  • the “average distance” is, for example, a distance when performing dusting in the above-described TUL when the object OBJ is a calculus.
  • FIG. 1B is a diagram showing a configuration in the vicinity of the light emitter 105 when the illumination optical system 101 has negative refractive power.
  • the focal length f L of the illumination optical system 101 is a negative value.
  • phi L is a beam diameter of the illumination light IL incident from the light source side (light emitter 105 side) to the illumination optical system 101.
  • the light emitter 105 is, for example, a light emitting diode (LED), a glass fiber that guides illumination light from a light source (not shown), or the like.
  • the position where the illumination light IL illuminates the stone is separated from the imaging optical system 102 as much as possible. That is, the optical path of the strong light ones light intensity of the illumination light IL, the position crossing the optical axis AX IM of the imaging optical system 102, it is desirable that away from the object side of the imaging optical system 102.
  • FIG. 2A is a diagram showing a configuration and an optical path in the vicinity of the light emitter 105 of the endoscope 100.
  • FIG. 2B is a diagram for explaining parameters of the endoscope 100.
  • FIG. 2C is another diagram showing the configuration and the optical path in the vicinity of the light emitter 105 of the endoscope 100.
  • FIG. 2D is another diagram for explaining parameters of the endoscope 100.
  • FIGS. 2A and 2B show a configuration in the case where the illumination optical system 101 has a negative refractive power.
  • FIGS. 2C and 2D are configurations when the illumination optical system 101 has a positive refractive power.
  • Conditional expression (1) will be described. Of the light emitted from the illuminator 105, attention is focused on the light beam that diverges to the outermost side among the light beams having the strongest emission angle of 0 °, that is, the light beam near the peripheral edge of the effective diameter of the illumination optical system 101. .
  • the distance L from the front end of the imaging optical system 102 when this light beam crosses the optical axis AX IM (see FIGS. 1C and 1E) of the imaging optical system 102 is expressed by the following equation ( b) is satisfied (see FIG. 3).
  • the illumination light IL reaches a position separated from the imaging optical system 102 by about L LI ⁇ tan ⁇ .
  • the stone is then illuminated to produce scattered light.
  • the distance L is small, the field of view deteriorates due to scattered light during dusting. On the other hand, if the distance L is too large, the light distribution in the attention area (for example, calculus) will deteriorate.
  • Conditional expression (1) is a relational expression regarding the distance L and the distance L 2 O.
  • the light distribution of the illumination light IL and the distal end layout of the endoscope 100 are selected so as to exceed the lower limit value of the conditional expression (1).
  • the optical path of the strong illumination light IL can be directed to a position away from the imaging optical system 102.
  • the visual field deterioration due to the scattering of the illumination light IL can be suppressed.
  • the endoscope has two or more illumination optical systems at the distal end, and that all the illumination optical systems satisfy the conditional expression (1).
  • a favorable visual field can be provided at the time of endoscopic treatment such as urinary calculus crushing, and the operability of the endoscope at the time of treatment can be improved.
  • L LI includes a center O L, the distance between the center O IM, OL is the center of the illumination optical system closest to the imaging optical system, O IM is the center of the imaging optical system, fL is the absolute value of the focal length of the illumination optical system, ⁇ L is the beam diameter of illumination light incident on the illumination optical system from the light source side, It is. Thereby, a better visual field can be secured.
  • the distal end portion further has a channel, there is one illumination optical system, and the following conditional expression (3) is satisfied. 40 ° ⁇ ⁇ ⁇ 90 ° (3) here, ⁇ , when the center of the channel in the cross section of the tip was O CH, a line segment connecting the center O CH and the center O IM, the angle between the line connecting the center O CH and the center O L, It is.
  • the shadow of the crushing probe projected on the calculus is important for grasping the positional relationship between the crushing probe and the calculus.
  • the positional relationship among the illumination optical system, the imaging optical system, and the channel through which the crushing probe is inserted / removed is defined so as to satisfy the conditional expression (3).
  • Satisfying conditional expression (3) makes it easier to visually recognize the shadow of the crushing probe projected onto the calculus. Thereby, the sense of distance between the calculus and the crushing probe can be easily grasped, and the operability at the time of endoscopic treatment is improved.
  • conditional expression (3) When the lower limit value of conditional expression (3) is not reached, the shadow of the crushing probe is hidden behind the crushing probe itself, and the shadow cannot be recognized.
  • conditional expression (3) If the upper limit value of conditional expression (3) is exceeded, the shadow of the crushing probe will appear in the direction of the center of the endoscope field of interest, and the operability of the endoscope during treatment will be reduced.
  • FIG. 4A is a diagram illustrating a distal end configuration of the endoscope 200 according to the first embodiment when viewed from the object side.
  • the endoscope 200 has an illumination optical system 101a, an imaging optical system 102a, and a channel 103a at the distal end.
  • the illumination optical system 101a has one plano-convex positive lens with the plane facing the object side.
  • FIG. 4A is a diagram illustrating a distal end configuration of the endoscope 201 according to the second embodiment when viewed from the object side.
  • the endoscope 201 includes an illumination optical system 101a, an imaging optical system 102a, and a channel 103a at the distal end.
  • the illumination optical system 101a has one plano-concave negative lens with a plane facing the object side.
  • FIG. 4B is a diagram illustrating a distal end configuration of the endoscope 300 according to the third embodiment when viewed from the object side.
  • the endoscope 300 has an illumination optical system 101b, an imaging optical system 102b, and a channel 103b at the distal end.
  • the illumination optical system 101b has one plano-convex positive lens with the plane facing the object side.
  • FIG. 4C is a diagram illustrating a distal end configuration of the endoscope 400 according to the fourth embodiment when viewed from the object side.
  • the endoscope 400 has an illumination optical system 101c, an imaging optical system 102c, and a channel 103c at the distal end.
  • the illumination optical system 101c has one plano-convex positive lens with the plane facing the object side.
  • FIG. 4D is a diagram illustrating a distal end configuration of the endoscope 500 according to the fifth embodiment when viewed from the object side.
  • the endoscope 500 has two illumination optical systems 101d1 and 101d2, an imaging optical system 102d, and a channel 103d at the distal end.
  • Each of the two illumination optical systems 101d1 and 101d2 has a plano-convex positive lens with the plane facing the object side.
  • FIG. 4D is a diagram illustrating a distal end configuration of the endoscope 501 according to the sixth embodiment when viewed from the object side.
  • the endoscope 501 has two illumination optical systems 101d1, 101d2, an imaging optical system 102d, and a channel 103d at the distal end.
  • Each of the two illumination optical systems 101d1 and 101d2 has one plano-convex positive lens with the plane facing the aspherical object side.
  • the aspherical shape of the illumination optical systems 101d1 and 101d2 of the present embodiment is a surface shape represented by the following expression when the optical axis AX L is the X axis and the height from the optical axis AX L is h. is there.
  • C is a paraxial curvature
  • K is a conical coefficient
  • A4 and A6 are fourth-order and sixth-order aspheric coefficients, respectively.
  • E ⁇ n (n is an integer) indicates “10 ⁇ n ”.
  • FIG. 4D is a diagram illustrating a distal end configuration of the endoscope 502 according to the seventh embodiment when viewed from the object side.
  • the endoscope 502 has two illumination optical systems 101d1, 101d2, an imaging optical system 102d, and a channel 103d at the distal end.
  • Each of the two illumination optical systems 101d1 and 101d2 has one plano-concave negative lens having a plane facing the aspherical object side.
  • Conditional expression (1) (2 ⁇ L LI ⁇ f L / ⁇ L ) / L O Condition (2) 2 ⁇ L LI ⁇ f L / ⁇ L Conditional expression (3) ⁇ Example Conditional Expression (1)
  • Conditional Expression (2) Conditional Expression (3) 1 0.806 5.24 58.7 ° 2 0.494 3.21 58.7 ° 3 0.359 1.69 45.0 ° 4 0.596 2.65 38.7 ° 5 0.107 2.13 37.3 ° (right side) 41.1 ° (left side) 6 0.103 2.06 37.3 ° (right side) 41.1 ° (left side) 7 0.103 2.06 37.3 ° (right side) 41.1 ° (left side) 41.1 ° (left side) 41.1 ° (left side) 41.1 ° (left side) 41.1 ° (left side) 41.1 ° (left side) 41.1 ° (left side) 41.1 ° (left side) 41.1 ° (left side) 41.1 ° (left side) 41.1 ° (left side) 41.1
  • the endoscope described above may satisfy a plurality of configurations at the same time. This is preferable for obtaining a good endoscope. Moreover, the combination of a preferable structure is arbitrary. For each conditional expression, only the upper limit value or lower limit value of the numerical range of the more limited conditional expression may be limited.
  • the present invention is useful for an endoscope that provides a good visual field during an endoscopic procedure such as urinary calculus crushing and improves the operability of the endoscope during the procedure.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Optics & Photonics (AREA)
  • Surgery (AREA)
  • Biomedical Technology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biophysics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • General Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Endoscopes (AREA)
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Abstract

La présente invention concerne un endoscope apte à maintenir un champ de vision favorable pendant le saupoudrage lors d'une lithotritie transurétrale. L'endoscope a un système d'éclairage (101) et un système optique d'imagerie (102) au niveau de l'extrémité de pointe et satisfait l'expression conditionnelle suivante (1) : 0,1 ≤ (2 × LLI × fL / φL) / LO ≤ 0,9 (1) où LLI représente la distance entre le centre OL et le centre OIM, OL représente le centre du système d'éclairage (101) le plus proche du système optique d'imagerie (102), OIM représente le centre du système optique d'imagerie (102), LO représente la distance d'observation par rapport à un objet, fL représente la valeur absolue de la longueur focale du système d'éclairage (101), et φL représente le diamètre du flux lumineux de la lumière d'éclairage incidente sur le système d'éclairage (101) provenant d'une source de lumière.
PCT/JP2018/015245 2017-05-12 2018-04-11 Endoscope Ceased WO2018207539A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-095943 2017-05-12
JP2017095943 2017-05-12

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WO2018207539A1 true WO2018207539A1 (fr) 2018-11-15

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PCT/JP2018/015245 Ceased WO2018207539A1 (fr) 2017-05-12 2018-04-11 Endoscope

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2021166014A1 (fr) * 2020-02-17 2021-08-26

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011200428A (ja) * 2010-03-25 2011-10-13 Olympus Medical Systems Corp 内視鏡
WO2013080831A1 (fr) * 2011-12-01 2013-06-06 オリンパスメディカルシステムズ株式会社 Dispositif endoscope
WO2015107844A1 (fr) * 2014-01-15 2015-07-23 オリンパス株式会社 Dispositif d'endoscope

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011200428A (ja) * 2010-03-25 2011-10-13 Olympus Medical Systems Corp 内視鏡
WO2013080831A1 (fr) * 2011-12-01 2013-06-06 オリンパスメディカルシステムズ株式会社 Dispositif endoscope
WO2015107844A1 (fr) * 2014-01-15 2015-07-23 オリンパス株式会社 Dispositif d'endoscope

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2021166014A1 (fr) * 2020-02-17 2021-08-26
WO2021166014A1 (fr) * 2020-02-17 2021-08-26 オリンパス株式会社 Dispositif d'endoscope et système d'endoscope
CN115103622A (zh) * 2020-02-17 2022-09-23 奥林巴斯株式会社 内窥镜装置及内窥镜系统
JP7256923B2 (ja) 2020-02-17 2023-04-12 オリンパス株式会社 内視鏡装置および内視鏡システム

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