WO2018207442A1 - Unité optique et endoscope - Google Patents

Unité optique et endoscope Download PDF

Info

Publication number
WO2018207442A1
WO2018207442A1 PCT/JP2018/007866 JP2018007866W WO2018207442A1 WO 2018207442 A1 WO2018207442 A1 WO 2018207442A1 JP 2018007866 W JP2018007866 W JP 2018007866W WO 2018207442 A1 WO2018207442 A1 WO 2018207442A1
Authority
WO
WIPO (PCT)
Prior art keywords
holding frame
lens holding
fixed
movable lens
adjustment member
Prior art date
Application number
PCT/JP2018/007866
Other languages
English (en)
Japanese (ja)
Inventor
亨 口丸
Original Assignee
オリンパス株式会社
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 オリンパス株式会社 filed Critical オリンパス株式会社
Priority to JP2018538800A priority Critical patent/JP6495555B1/ja
Publication of WO2018207442A1 publication Critical patent/WO2018207442A1/fr

Links

Images

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
    • A61B1/04—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 combined with photographic or television appliances
    • A61B1/05—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 combined with photographic or television appliances characterised by the image sensor, e.g. camera, being in the distal end portion
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor

Definitions

  • the present invention relates to an optical unit and an endoscope that are disposed at a distal end portion of an endoscope insertion portion and have a movable lens driving portion that moves a part of an objective lens.
  • An endoscope having an imaging unit that can be introduced into the living body or the structure from outside the living body or the structure to observe a portion that is difficult to observe, such as the inside of the living body or the structure.
  • Mirrors are used, for example, in the medical and industrial fields.
  • An imaging unit of an endoscope captures an objective lens that forms a subject image and a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) sensor that is generally disposed on the imaging surface of the objective lens. It comprises an element.
  • CCD Charge Coupled Device
  • CMOS Complementary Metal Oxide Semiconductor
  • Japanese Unexamined Patent Application Publication No. 2013-116349 discloses a function (magnification function, zoom function) that has a movable lens in an objective lens and changes the photographing magnification by moving the movable lens in the optical axis direction.
  • An endoscope optical unit provided is disclosed.
  • the optical unit disclosed in Japanese Patent Application Laid-Open No. 2013-116349 photographs the pressing force applied from the contact member to the contact surface by the contact member contacting the contact surface of the movable lens holding frame.
  • the movable lens holding frame is extended in the direction along the photographic optical axis, and the desired optical characteristics are stabilized.
  • a technique has been disclosed that prevents the occurrence of vignetting by improving the reproducibility of stopping the movable lens holding frame at a certain wide end position while preventing the image from shaking when moving forward and backward. .
  • the optical unit for endoscopes is likely to suffer from defects in optical performance such as one-sided blur due to the inclination and decentration of the objective optical system, etc., with the recent decrease in pitch due to the increase in the number of pixels of the image sensor. .
  • a conventional optical unit having a movable lens holding frame that moves back and forth as described in Japanese Patent Application Laid-Open No. 2013-116349 has a backlash that fits between the movable lens holding frame and the fixed lens frame.
  • the movable lens holding frame has a problem that the front and rear stop positions vary and the movable lens holding frame does not stop at a position that satisfies the desired optical characteristics.
  • the conventional optical unit is required to have high accuracy of the movable lens holding frame and the fixed lens frame.
  • the optical unit is required to be reduced in size for reducing the diameter of the insertion portion, and even with the same dimensional accuracy as in the prior art, the influence of optical characteristics due to small parts is likely to occur.
  • the present invention aims to easily set the advance / retreat stop position of the movable lens holding frame so that a predetermined optical performance can be stably obtained at the time of assembly even if it is downsized.
  • An optical unit and an endoscope that can be adjusted are realized.
  • An optical unit includes a fixed lens holding frame that holds a fixed lens, a movable lens holding frame that is arranged to be movable forward and backward relative to the fixed lens holding frame, and the movable lens.
  • a biasing member that biases the lens holding frame toward the base end side, and a drive mechanism that is disposed on the fixed lens holding frame and drives the movable lens holding frame toward the distal end against the biasing force of the biasing member.
  • the movable lens holding frame fixed in a state where the posture is uniquely determined by line contact or surface contact with two edges or tapered surfaces parallel to the photographing optical axis formed on the fixed lens holding frame.
  • an adjustment member that adjusts the advancing / retreating position.
  • An endoscope includes a fixed lens holding frame that holds a fixed lens, a movable lens holding frame that is disposed to be movable forward and backward with respect to the fixed lens holding frame, and holds the movable lens; An urging member that urges the movable lens holding frame toward the base end side, and a drive that is disposed on the fixed lens holding frame and drives the movable lens holding frame toward the distal end against the urging force of the urging member.
  • the movable lens holding unit is fixed in a state where the posture is uniquely determined by line contact or surface contact with two edges or tapered surfaces parallel to the photographing optical axis formed on the mechanism unit and the fixed lens holding frame. And an adjustment unit that adjusts the advancing / retreating position by contacting the frame.
  • the top view which shows the adjustment member of the 5th modification, and the arm part of a movable lens holding frame The perspective view which shows the state in which the adjustment member of the 6th modification was mounted in the holding stand.
  • FIG. 1 is a diagram illustrating an endoscope including an endoscope optical unit
  • FIG. 2 is a cross-sectional view illustrating an outline of a distal end portion of an insertion portion of the endoscope
  • FIG. 3 is a diagram illustrating an endoscope optical unit.
  • FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3
  • FIG. 5 is a partial sectional view explaining a state in which the movable lens holding frame is moved to the proximal end side
  • FIG. FIG. 7 is an exploded perspective view showing a state in which the adjustment member is arranged on the fixed frame
  • FIG. 8 is a perspective view showing a state in which the adjustment member is adjusted back and forth.
  • 9 is a perspective view showing a state in which the adjustment member is fixed to the fixed frame
  • FIG. 10 is a partial cross-sectional view showing a state in which the adjustment member is fixed to the fixed frame.
  • the endoscope 101 of the present embodiment has a configuration that can be introduced into a subject such as a human body and optically images a predetermined observation site in the subject.
  • the subject into which the endoscope 101 is introduced is not limited to a human body, and may be another living body or an artificial object such as a machine or a building.
  • the endoscope 101 includes an insertion portion 102 introduced into the subject, an operation portion 103 located at the proximal end of the insertion portion 102, and a universal cord 104 extending from a side portion of the operation portion 103. It is mainly composed.
  • the insertion portion 102 is disposed at the distal end portion 110 disposed at the distal end, the bendable bending portion 109 disposed on the proximal end side of the distal end portion 110, and the proximal end side of the bending portion 109.
  • a flexible tube portion 108 having flexibility and connected to the distal end side is continuously provided.
  • the endoscope 101 may have a so-called rigid endoscope that does not include a flexible portion in the insertion portion.
  • the operation unit 103 is provided with a scaling operation unit 107 which is a lever switch for instructing an operation of an actuator 30 as a drive mechanism unit described later and performing an imaging magnification changing operation of the imaging unit 1.
  • the scaling operation unit 107 may be other types such as a rotary switch, a push switch, or a touch sensor.
  • the endoscope 101 includes a universal cord 104, an electric cable 115 inserted into the operation unit 103 and the insertion unit 102, and an optical fiber bundle 114 (not shown in FIG. 1) shown in FIG. Yes.
  • the electrical cable 115 is configured to electrically connect the connector unit 105 and the imaging unit 1.
  • the imaging unit 1 is electrically connected to the external device 120 via the electric cable 115.
  • power is supplied from the external device 120 to the imaging unit 1, and communication between the external device 120 and the imaging unit 1 is performed.
  • the optical fiber bundle 114 is configured to transmit the light emitted from the light source unit included in the external device 120 to the illumination light emitting unit 113 of the distal end portion 110.
  • the light source unit may be configured to be disposed on the operation unit 103 or the distal end portion 110 of the endoscope 101.
  • the external device 120 includes, for example, a light source unit, a power supply unit 120a, an image processing unit 120b, and an image display unit 121.
  • the power supply unit 120a is configured to output electric power for operating the actuator 30 included in the imaging unit 1 in accordance with the operation of the scaling operation unit 107 by the user.
  • the image processing unit 120 b has a configuration that generates a video signal based on the image sensor output signal output from the imaging unit 1 and outputs the video signal to the image display unit 121. That is, the optical image picked up by the image pickup unit 1 is displayed on the display unit 121 as a video. Note that some or all of the power supply unit 120a, the image processing unit 120b, and the image display unit 121 may be arranged in the endoscope 101 instead of the external device 120.
  • the image pickup device 12 is formed by arranging a plurality of light receiving devices that photoelectrically convert incident light.
  • the image pickup device 12 is generally referred to as a CCD (charge coupled device), a CMOS (complementary metal oxide semiconductor) sensor, or the like.
  • CCD charge coupled device
  • CMOS complementary metal oxide semiconductor
  • various other types of imaging devices can be applied.
  • the image sensor 12 is disposed such that the light receiving element is positioned on the image forming surface of the objective lens 11.
  • the pressing cap 32a provided at the distal end of the pressing portion 32 causes the arm portion 23b of the movable lens holding frame 23 to move in the distal direction by the urging force of the second spring 34. Press to.
  • the first spring 31 has a force that biases the arm portion 23b in the proximal direction along the axis Z, and a force that biases the arm portion 23b in the distal direction along the axis Z by the second spring 34. Also configured to be weak. Therefore, when the SMA wire 36 is extended, the arm portion 23b moves in the distal direction so as to be in the state shown in FIG. 4 by the urging force of the second spring 34, and comes into contact with the convex portion 22a.
  • the SMA wire 36 is configured to be electrically connectable to the power supply unit 120a shown in FIG. 1 via a pair of electric wires (not shown).
  • the current output from the power supply unit 120a is: Applied to the SMA wire 36.
  • the edge C here is a boundary line between the opposing wall surfaces (side surfaces) of the two wall portions of the holding table 27 along the slit 21b and the protruding end surfaces (upper surfaces in the drawing) of the two wall portions. It is two straight ridgelines.
  • the imaging unit 1 built in the distal end portion 110 of the insertion portion 102 is very small, and various components of the imaging unit 1 are very small, It is difficult to ensure the accuracy of each part. For this reason, the fixed frame 21 and the movable lens holding frame 23 are also small in size, and it is difficult to ensure the component accuracy.
  • the adjustment member 26 corrects the inclination of the movable lens holding frame 23 when the movement is stopped at the tele end position. can do.
  • the objective optical system may be designed so that the position where the movable lens holding frame 23 moves to the base end and stops becomes the wide end, or moves to the distal end side of the movable lens holding frame 23 and stops.
  • the adjustment member 26 may be provided on the distal end side so as to correct the inclination.
  • the imaging unit 1 is set to satisfy the optical performance at the wide end position where the movable lens holding frame 23 moves to the front end side and stops at the time of assembly, and then the position of the adjustment member 26 is adjusted.
  • the telephoto end position where the movable lens holding frame 23 moves to the base end side and stops is adjusted.
  • the imaging unit 1 provided in the endoscope 101 described in the above embodiment may include configurations of various modifications described below.
  • FIG. 11 is a partial cross-sectional view showing a state in which the adjustment member of the first modification is fixed to the fixed frame.
  • a tapered surface 29 is formed opposite to the protruding ends of the two wall portions of the holding base 27, and the two tapered surfaces 29 and the outer peripheral surface of the adjustment member 26 are in line contact (circle d in the figure).
  • the line contact (including the points inside) is very good.
  • the adjustment member 26 is moved and adjusted in the front-rear (FR) direction and is fixed to the holding base 27 by the adhesive 28.
  • An anchor effect is obtained by the adhesive 28 entering and hardening into the concave portion 27a, and the adhesive force and fixing durability between the adjusting member 26 and the holding base 27 can be improved.
  • FIG. 14 is a perspective view showing a state in which the adjustment member of the fourth modified example is fixed to the holding base.
  • a bottomed groove 26 c may be formed on the outer peripheral portion serving as the outer surface of the adjustment member 26 so that the adhesive strength by the adhesive 28 is increased.
  • This groove portion 26 c is also formed in an adhesive region by the adhesive 28.
  • the adhesive 28 enters the hardened portion 26c and hardens, whereby an anchor effect is obtained, and the adhesive force between the adjusting member 26 and the holding base 27 and the fixing durability can be improved.
  • the configuration of the present modification and the configuration of the third modification, it is possible to further improve the adhesive force and fixing durability between the adjustment member 26 and the holding base 27.
  • the adjustment member 26 is rotated and fixed around the axis so that the convex portion 26d contacts the arm portion 23b at an appropriate position. Fine adjustment of the tilt correction of the lens holding frame 23 in the axis X direction and the axis Y direction can be performed.
  • FIG. 17 is a perspective view showing a state in which the adjustment member of the sixth modified example is placed on the holding table.
  • the convex portion 26d of the adjustment member 26 illustrated in the fifth modified example has a convex surface that is a convex curved surface, so that the finer correction of the tilt of the movable lens holding frame 23 in the axis X direction and the axis Y direction is fine.
  • the configuration can be adjusted.
  • the structure of each modification mentioned above can be combined, respectively.
  • FIG. 18 is a partial cross-sectional view showing a state in which the adjustment member of the seventh modified example is fixed to the holding base.
  • the adjustment member 26 may have a configuration in which two tapered surfaces 26 e are formed in the longitudinal direction and are fixed in a state of being in line contact with the holding table 27.
  • FIG. 20 is a partial cross-sectional view showing a state in which the adjustment member of the ninth modified example is fixed to the holding base.
  • the adjustment member 26 has two tapered surfaces 26 e formed in the longitudinal direction, and is in surface contact with the two tapered surfaces 29 formed at the projecting ends of the two wall portions of the holding base 27. It is good also as a structure fixed by.
  • FIG. 21 is a partial cross-sectional view showing a state where the adjustment member of the tenth modification is fixed to the holding base.
  • the adjustment member 26 has one tapered surface 26 e formed in the longitudinal direction, is in surface contact with the tapered surface 29 formed at the protruding end of one wall portion of the holding base 27, and the side surface is held. It is good also as a structure fixed in the state which is in surface contact with the wall surface of the other wall part of the stand 27.
  • an optical unit and an endoscope that can easily adjust the advancing / retreating stop position of the movable lens holding frame so that predetermined optical performance can be stably obtained at the time of assembly even if it is downsized. it can.

Landscapes

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

Abstract

Une unité optique 1 comprend : un cadre de retenue de lentille mobile 23 qui est agencé de façon à se déplacer vers l'avant et vers l'arrière par rapport à un cadre de retenue de lentille fixe 21; un élément biaisant 31 qui sollicite le cadre de retenue de lentille mobile 23 vers une extrémité de base; un mécanisme de commande qui est disposé sur le cadre de retenue de lentille fixe et entraîne le cadre de retenue de lentille mobile vers une extrémité avant contre la force de sollicitation de l'élément de sollicitation; et un élément de réglage 26 qui est amené en contact linéaire ou plan avec deux côtés de bord C ou une surface effilée 29 parallèle à un axe optique de photographie O qui est formé dans le cadre de retenue de lentille fixe 21 et est ainsi fixé dans un état dans lequel la position est déterminée de manière unique, l'élément de réglage venant en contact avec le cadre de retenue de lentille mobile pour régler la position avant et arrière du cadre de retenue de lentille mobile.
PCT/JP2018/007866 2017-05-08 2018-03-01 Unité optique et endoscope WO2018207442A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2018538800A JP6495555B1 (ja) 2017-05-08 2018-03-01 光学ユニットおよび内視鏡

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017092536 2017-05-08
JP2017-092536 2017-05-08

Publications (1)

Publication Number Publication Date
WO2018207442A1 true WO2018207442A1 (fr) 2018-11-15

Family

ID=64105106

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/007866 WO2018207442A1 (fr) 2017-05-08 2018-03-01 Unité optique et endoscope

Country Status (2)

Country Link
JP (1) JP6495555B1 (fr)
WO (1) WO2018207442A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102278134B1 (ko) * 2020-05-28 2021-07-16 재단법인 아산사회복지재단 영상 획득 광학 모듈
WO2022259550A1 (fr) * 2021-06-11 2022-12-15 オリンパス株式会社 Endoscope et unité d'imagerie

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007271889A (ja) * 2006-03-31 2007-10-18 Citizen Miyota Co Ltd 固体撮像装置
WO2016147468A1 (fr) * 2015-03-17 2016-09-22 オリンパス株式会社 Unité d'imagerie et endoscope

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007271889A (ja) * 2006-03-31 2007-10-18 Citizen Miyota Co Ltd 固体撮像装置
WO2016147468A1 (fr) * 2015-03-17 2016-09-22 オリンパス株式会社 Unité d'imagerie et endoscope

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102278134B1 (ko) * 2020-05-28 2021-07-16 재단법인 아산사회복지재단 영상 획득 광학 모듈
WO2022259550A1 (fr) * 2021-06-11 2022-12-15 オリンパス株式会社 Endoscope et unité d'imagerie

Also Published As

Publication number Publication date
JPWO2018207442A1 (ja) 2019-06-27
JP6495555B1 (ja) 2019-04-03

Similar Documents

Publication Publication Date Title
JP5289870B2 (ja) 内視鏡用撮像ユニット
JP5054230B2 (ja) 撮像ユニット
EP2698094B1 (fr) Unité de capture d'image pour endoscope
US10288867B2 (en) Driving unit, optical unit, imaging apparatus, and endoscope
WO2014203626A1 (fr) Unité d'imagerie, et endoscope
JP5041910B2 (ja) 撮像装置および電子機器
JP6495555B1 (ja) 光学ユニットおよび内視鏡
JP5080387B2 (ja) レンズユニット
JP6057595B2 (ja) 内視鏡
JP2009162898A (ja) レンズ鏡筒および光学素子駆動装置
US20170224204A1 (en) Signal line installation structure of elongated member
JP4908023B2 (ja) 内視鏡装置
JP2020144279A (ja) レンズ鏡筒、及び撮像装置
JP4647817B2 (ja) 電子内視鏡
JP3635525B2 (ja) 内視鏡システム
JP5412590B2 (ja) 内視鏡用撮像ユニット
JP6234655B1 (ja) 内視鏡用撮像ユニットおよび内視鏡
WO2018079070A1 (fr) Endoscope
JP4406165B2 (ja) 内視鏡装置
JP2001033710A (ja) 拡大観察用内視鏡
WO2018079077A1 (fr) Endoscope
JP2007256443A (ja) レンズ鏡胴及び撮像装置
JP2016220945A (ja) 撮像ユニット及び内視鏡
JP2007004003A (ja) レンズ駆動装置

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 2018538800

Country of ref document: JP

Kind code of ref document: A

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18798496

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18798496

Country of ref document: EP

Kind code of ref document: A1