WO2005058148A1 - 内視鏡 - Google Patents
内視鏡 Download PDFInfo
- Publication number
- WO2005058148A1 WO2005058148A1 PCT/JP2004/018740 JP2004018740W WO2005058148A1 WO 2005058148 A1 WO2005058148 A1 WO 2005058148A1 JP 2004018740 W JP2004018740 W JP 2004018740W WO 2005058148 A1 WO2005058148 A1 WO 2005058148A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- illumination
- lens
- endoscope
- optical system
- distal end
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 73
- 238000003780 insertion Methods 0.000 claims abstract description 52
- 230000037431 insertion Effects 0.000 claims abstract description 52
- 238000009792 diffusion process Methods 0.000 claims abstract description 30
- 238000005286 illumination Methods 0.000 claims description 114
- 238000005498 polishing Methods 0.000 claims description 9
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 5
- 229910000040 hydrogen fluoride Inorganic materials 0.000 claims description 5
- 238000011282 treatment Methods 0.000 abstract description 9
- 239000013307 optical fiber Substances 0.000 description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 238000003384 imaging method Methods 0.000 description 13
- 238000009826 distribution Methods 0.000 description 12
- 238000005452 bending Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 3
- 238000007517 polishing process Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000006059 cover glass Substances 0.000 description 2
- 210000002429 large intestine Anatomy 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 210000003097 mucus Anatomy 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
- A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
- A61B1/00096—Optical elements
-
- 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
- A61B1/00163—Optical arrangements
- A61B1/00174—Optical arrangements characterised by the viewing angles
-
- 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
- A61B1/0623—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 for off-axis illumination
-
- 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
- A61B1/0655—Control therefor
-
- 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
-
- 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
- A61B1/00064—Constructional details of the endoscope body
- A61B1/0011—Manufacturing of endoscope parts
Definitions
- the present invention relates to an endoscope, and more particularly, to a wide-angle endoscope in which an observation optical system has a wide-angle viewing angle.
- endoscopes are widely used in the medical field and the like.
- the endoscope can observe organs in the body cavity by inserting a long and thin insertion part into the body cavity, and can perform various treatments using a treatment tool inserted into the through channel of the treatment tool as necessary. You can do it.
- a bending section is provided at the distal end of the insertion section, and the operating section of the endoscope is operated to bend the bending section, so that the objective lens at the distal end of the observation optical system provided in the insertion section. Can change the observation direction.
- the viewing angle of the observation optical system of the conventional endoscope is, for example, 140 °, and the surgeon observes the inside of the body cavity with the observation image of the viewing angle, but observes a part outside the viewing range.
- the operator wants to do so, as described above, the operator observes a portion outside the visual field range by bending the bending portion.
- the endoscope proposed in Patent Document 1 for example, 180 is provided at the curved portion and the distal end portion of the insertion portion.
- An observation optical system having a wide viewing angle is provided.
- the illumination optical system provided at the curved portion and distal end of the insertion section and illuminating the inside of the body cavity uniformly illuminates the inside of the body cavity. Is disposed on an axis that is inclined with respect to the axial direction in which is disposed.
- the illumination optical system has sufficient brightness and light distribution for the wide-angle observation range of the observation optical system.
- a plurality of illumination lenses are used to illuminate the image (see, for example, Patent Document 2).
- Patent Document 1 Japanese Patent Application Laid-Open No. 2001-258823
- Patent Document 2 JP-A-10-99268
- an endoscope in which an illumination optical system as proposed in Patent Document 1 is disposed on an axis inclined with respect to an axial direction in which an observation optical system is disposed is different from an illumination optical system. Since the illumination optical system is more inclined than the endoscope in which the observation optical system is arranged on the axis parallel to the observation optical system, the outer diameter of the curved portion of the endoscope and the outer diameter of the distal end becomes larger. There is.
- the illumination optical system is composed of a plurality of illumination lenses as proposed in Patent Document 2, the outer diameter of the curved portion of the endoscope insertion portion and the distal end portion is further increased. There is a problem that it will be lost. Further, in view of such a problem, when the illumination optical system is configured by the:! Lens, there is a problem that the amount of light around the visual field of the observation optical system is insufficient.
- the present invention has been made in view of the above problems, and has sufficient brightness for a wide-angle observation range of an observation optical system that does not increase the outer diameter of a distal end portion of an endoscope insertion section. It is an object of the present invention to provide an endoscope that can be illuminated with light distribution.
- an endoscope according to the present invention is an endoscope having an insertion portion, which is provided on a distal end surface of the insertion portion in an insertion axis direction, and is used when observing a body cavity.
- An observation optical system having a wide viewing angle to be used, and a plurality of illumination optics provided on an axis inclined with respect to the insertion axis direction of the insertion portion and used for illuminating a body cavity
- an illumination lens of at least one of the plurality of illumination optical systems is a lens subjected to light diffusion processing.
- the illumination lens of the at least one illumination optical system is characterized by comprising one convex lens, and the light-diffused lens faces an observation site in a body cavity.
- the illumination lens of the at least one illumination optical system is characterized in that a light diffusing surface is formed on at least one surface excluding a surface, except for a surface facing the body cavity.
- a light diffusing surface is formed on one surface, and the light diffusing surface is formed on a curvature surface of an illumination lens of the at least one illumination optical system;
- the light diffusing surface is formed by grinding and polishing, and the light diffusing surface is formed by surface processing using hydrogen fluoride water after grinding and polishing.
- the light diffusing surface is formed by press working, and the illumination lens of the at least one illumination optical system has a side surface mirror-finished. I do.
- an endoscope according to the present invention includes three illumination optical systems described above.
- the endoscope of the present invention can illuminate the wide-angle observation range of the observation optical system with sufficient brightness and light distribution without increasing the outer diameter of the distal end of the endoscope insertion section. it can.
- FIG. 1 is a front view schematically showing an endoscope according to an embodiment of the present invention.
- FIG. 2 is a front view of a distal end surface of an insertion portion of the endoscope in FIG. 1.
- FIG. 3 is a longitudinal sectional view of the endoscope in FIG. 2 along the line II-II.
- FIG. 4 is an enlarged front view of the illumination lens in FIG. 3.
- FIG. 5 is a partially enlarged front view of a light diffusion surface of the illumination lens in FIG. 4.
- FIG. 6 is a partially enlarged front view showing that the side surface of the illumination lens in FIG. 4 is mirror-finished.
- Illumination lens (illumination optical system) 21 Tip of insertion section
- FIG. 1 is a front view schematically showing an endoscope according to an embodiment of the present invention.
- the endoscope 1 includes an operation unit 2 for controlling a bending operation and a channel system, and an insertion unit connected to the operation unit 2 at a base end thereof and inserted into a body cavity. 3 and a universal cord 3a extending from the operation section 2 and having a connector section 40 at the distal end.
- the connector section 40 is connected to a light source device, not shown, via a predetermined connector.
- the insertion portion 3 includes a flexible tube 8, a curved portion 9 provided on the distal end side of the tube 8, and a distal end portion 10 provided on the distal end side of the curved portion 9. Have been.
- the distal end portion 10 has a built-in image sensor 32d for imaging a site in a body cavity.
- the operation section 2 is provided with a bending operation knob for remotely bending the bending section 9.
- a pulling action and a relaxing action of an operation wire (not shown) inserted into the insertion portion 3 occur, and as a result, the bending portion 9 can bend in four directions. I have.
- FIG. 2 is a front view of the distal end surface of the insertion section of the endoscope in FIG.
- an objective lens 32a and, for example, three illumination lenses 11, 12, 13, which are illumination optical systems
- air and water are supplied to wash the dirt on the objective lens 32a or the three illumination lenses 11, 12, 12, and 13.
- a pneumatic water supply nozzle 25 and a front water supply nozzle 26 for cleaning blood, mucus, etc. of the affected part in the body cavity are provided. Therefore, on the distal end surface 21 of the distal end portion 10, an objective lens 32 a, three illumination lenses 11, 12, 13, a treatment tool opening 24, an air / water supply nozzle 25, and a front water supply nozzle 26 are provided. There are provided a plurality of openings for disposing.
- the three illumination lenses 11, 12, 13 are arranged in the vicinity of the periphery of the objective lens 32a at a predetermined angular interval. Further, between the illumination lenses and near the periphery of the objective lens 32a, an opening 24 such as a treatment tool, an air / water supply nozzle 25, and a front water supply nozzle 26 and are arranged.
- an opening 24 such as a treatment tool is provided between the illumination lens 11 and the illumination lens 12, and the opening is provided between the illumination lens 12 and the illumination lens 13.
- a pneumatic water supply nozzle 25 is provided, and a front water supply nozzle 26 is provided between the illumination lens 13 and the illumination lens 11.
- FIG. 3 is a longitudinal sectional view of the endoscope of FIG. 2 along the line II-II, and FIG. 4 is an enlarged front view of the illumination lens in FIG.
- an imaging unit 32 arranged in parallel with an axis into which the distal end portion 10 is inserted, and a light guide unit 33 for emitting light to the illumination lens 11.
- a distal end hard portion 31 having a space for disposing the like.
- a cap 31a is covered on the distal end side in the axial direction of insertion of the hard distal end portion 31 so as to cover the front surface and the outer peripheral surface of the hard distal end portion 31.
- the imaging unit 32 is inserted into and fixed to the distal end hard portion 31.
- the imaging unit 32 is 150.
- the observation optical system 32b constituted by a plurality of lenses having a wide viewing angle having the objective lens 32a having a wide viewing angle of, for example, 150 ° to 170 °, and a rear end side of the observation optical system 32b are provided.
- the imaging unit 32 further includes a substrate 32e having various circuits connected to the imaging element 32d. Further, a signal cable 32f is connected to the board 32e. The signal cable 32f passes through the insertion section 3 and is connected to a video processor (not shown) to which an endoscope is connected. The fixing of the imaging unit 32 to the distal end hard portion 31 is performed by a filler (not shown) or the like.
- the light guide unit 33 includes an illumination lens 11 of at least one illumination optical system, and an optical fiber bundle 33b including a plurality of optical fibers serving as light guides provided on the rear end side of the illumination lens 11.
- the main part is constituted by.
- the light guide unit 33 is fixed to the distal end hard portion 31 by a fixing screw 34.
- the ride guide unit 33 extends rearward from the distal end hard portion 31 and is connected to a lighting device (not shown).
- the distal end of the hard portion 33h of the optical fiber bundle 33b may be fixed in the frame 33d via a base 33K formed of, for example, a pipe.
- a base 33K may be attached to the outer periphery of the tip of the hard portion 33h of the optical fiber bundle 33b, and the base member 33 may be fitted and fixed to the inner periphery of the frame 33d.
- the cap 33K is used to prevent a positional deviation between the optical fiber bundle 33b and the optical axis 32LA of the imaging unit 32 during assembly. This makes it possible to improve the accuracy and balance efficiency of diffusion of light emitted from the illumination lens 11 when the optical fiber bundle 33b and the illumination lens 11 are combined.
- the processing accuracy of the distal end rigid portion 31 and the illumination lens 11 and the light may differ, but the base 33K is framed by the frame 33d.
- the frame 33d is attached to the distal end hard portion 31, and then the base 33K attached to the optical fiber bundle 33b is attached to the tip 33K. Insert and fit into the hard part 31.
- the optical fiber bundle 33b is covered with a sheath tube 33e.
- the outer tube 33e is fixed to the outer periphery of the optical fiber bundle 33b by a thread 33g.
- the optical fiber bundle 33b is bent at a predetermined position P1 on the way. Therefore, The optical axis 33LA of the illumination lens 11 that emits the illumination light is not parallel to the optical axis 32LA of the imaging unit 32. That is, the optical axis 33LA is inclined with respect to the optical axis 32LA in a direction away from a point ahead of the observation direction of the optical axis 32LA of the imaging unit 32.
- the optical axis of the light guide unit 33 corresponding to the other illumination lenses 12 and 13 is also separated from a point in the observation direction of the optical axis 32LA of the imaging unit 32 with respect to the tip direction force of the optical axis.
- the tip side of the ride guide unit 33 is arranged to be inclined with respect to the observation optical system 32b, and the surface of the illumination lens 11 is arranged to be inclined with respect to the surface of the objective lens 32a.
- the objective lens 32a and the observation optical system 32b are constituted by lenses having a wide viewing angle, so that the light guide unit 33 that illuminates the inside of the body cavity is uniformly distributed throughout the body cavity. This is because irradiation is necessary.
- the optical fiber bundle 33b is inserted into the hard distal end portion 31 during assembly into the optical fiber bundle 33b.
- the hard portion 33h is formed by, for example, being hardened with an adhesive. Therefore, the optical fiber bundle 33b is composed of the hard part 33h and the soft part 33f formed by bundling a plurality of optical fibers.
- the hard portion 33h is formed forward of the optical fiber bundle 33b in the insertion axis direction, and the soft portion 33f is formed rearward of the optical fiber bundle 33b in the insertion axis direction.
- the optical fiber bundle 33b is positioned so that the boundary between the hard portion 33h and the soft portion 33f, that is, the rear end of the hard portion 33h is located closer to the base end than the rear end surface of the hard end 31 in the insertion axis direction. It is held by the hard part 31.
- the optical fiber bundle 33b is inserted into a prescribed space of the distal end hard portion 31 by, for example, grasping and pushing the optical fiber bundle 33b by an operator. If the hard portion 33h is formed such that the boundary of the soft portion 33f is located on the distal end side of the rear end surface in the distal hard portion 31, the operator must grasp the soft portion 33f, and the pushing force is an optical fiber bundle. If the assembly efficiency is poor because it is difficult to reach the tip of 33b, there are circumstances.
- the operator can grasp the hard portion 33h and hold the 33b tip Since it can be inserted into the space of the hard portion 31, the pushing force can be surely transmitted to the tip of the optical fiber bundle 33b, so that the assemblability can be improved.
- the illumination lens 11 is composed of a single lens that has been subjected to light diffusion processing. More specifically, as shown in FIG. 4, the illumination lens 11 is formed of a single convex lens, and has at least one surface excluding the surface facing the observation site in the body cavity, for example, the emission of the optical fiber bundle 33b.
- the light diffusing surface 11a is formed on the curvature surface that comes into contact with the end surface.
- the interference between other members constituting the observation optical system 32b and the like may cause an interference between the exit end face of the optical fiber bundle 33b and the illumination lens 11. In some cases. When such a state occurs, the exit end face of the optical fiber bundle 33b approaches the rear focal position ff of the illumination lens 11, and the mesh pattern of the exit end face of the optical fiber bundle 33b forms an image on the image plane 4. In particular, the uneven light distribution of the illuminating light on the image plane 4 becomes remarkable.
- the light diffusing surface 11a diffuses when light emitted from the exit end face of the optical fiber bundle 33b passes. That is, when the light diffusing surface 11a is not formed on the illumination lens 11, the light beam radiated as L1 to L4 passes through the light diffusing surface 11a, so that Ll ', L2', L3 ', L4 Thus, the image is projected on the image plane 4 as shown by ', and the light distribution unevenness is eliminated.
- an illumination lens there are a grinding and polishing process and a pressing process.
- the lens surface is mirror-finished in place of a large-particle whetstone in place of a fine-grain whetstone.
- the surface of the illumination lens 11 other than the light diffusing surface 11a is formed by mirror finishing after grinding and polishing, and the light diffusing surface 11a is formed to have a grain shape by grinding and polishing.
- the illumination lens can also be formed by press working.
- the molding die is also manufactured by grinding, its surface is not finished to a mirror surface, Leave it on the order of a meter wide.
- a lens having a light diffusing surface can be manufactured in one step, and the number of processing steps can be reduced, and the cost of the lens can be reduced.
- the surface of the mold may have a microlens shape, a diffuser shape, or a Fresnel lens.
- FIG. 5 shows a partially enlarged front view of the light diffusing surface 11a of the illumination lens 11 of FIG. 4.
- the surface of the light diffusing surface 11a is subjected to graining by grinding and polishing. It is rough.
- the light diffusing surface formed using a grindstone with a large particle of about 800 has a very rough surface, and its light transmittance is about 30%.
- the light diffusion surface formed by the grindstone of coarse particles has a high light diffusion surface effect and is very effective in avoiding uneven light distribution of illumination light.
- a light diffusing surface generates a large amount of irregular reflection of light inside the lens and inside the housing, and the light emitted from the optical fiber bundle 33b cannot be efficiently guided into the observation field of view.
- the light diffusion surface 11a is provided on at least one surface except the surface facing the body cavity, dirt and dust adhering during observation and storage can be used for lighting after sterilization and disinfection. There is no hygiene problem that remains on the opposite surface of the lens 11 in the body cavity.
- the illumination lens 11 is composed of only one convex lens, the overall length and the outer shape of the optical system can be reduced while maintaining a wide light distribution. Therefore, the outer diameter D of the distal end portion 10 of the endoscope insertion section 3 can be formed smaller than when the illumination optical system is configured by a plurality of illumination lenses.
- the illumination lens 11 may have a side surface 11c processed into a mirror surface.
- the air / water supply nozzle 25 is made of, for example, a metal.
- the opening 25a is provided in the direction parallel to a plane orthogonal to the optical axis of the imaging unit 32, and passes through the surface of the objective lens 32a and the surface of the illumination lens 11 It is provided so as to be ejected in the direction.
- the air / water supply nozzle 25 is located at a position outside the range of the viewing angle of the objective lens 32a.
- the shape of the distal end surface 21 of the distal end portion 10 formed by the distal end surfaces of the cap 31a, the illumination lens 11, the objective lens 32a, and the air / water supply nozzle 25 has a slope. Shape.
- the base end side of the air / water supply nozzle 25 has a pipe shape, and is connected to a water supply tube 25c via a connection pipe 25b. Therefore, a water transmission pipeline is formed by the connection pipe 25b and the water transmission tube 25c.
- the water supply tube 25c is fixed to the connecting tube 25b by a spool 25d.
- the proximal end of the distal end hard portion 31 is fixed to a part of the curved distal end piece 35.
- the proximal end side of the distal end hard portion 31 and the curved distal end piece 35 are covered with an outer tube 36.
- the outer tube 36 is fixed to the distal end hard portion 31 by a bobbin 37.
- the illumination lens 11 has the light diffusing surface 11a formed on the curvature surface in contact with the emission end face of the optical fiber bundle 33b. It is composed of one convex lens that has been subjected to light diffusion processing.
- the surface 11a of the illumination lens 11 that has been subjected to the light diffusion process is subjected to a grinding and polishing process
- the surface is subjected to a chemical surface treatment using, for example, a hydrogen fluoride solution to provide a smooth surface. Since the illumination lens 11 is formed on the light diffusing surface, the illumination lens 11 efficiently and uniformly distributes the illumination light within the field of view of the imaging surface while reducing the light distribution unevenness to a level at which there is no practical problem. I can guide you.
- the illumination lens 11 is composed of only one convex lens, it is possible to maintain a wide light distribution and to reduce the overall length and outer shape of the optical system.
- the outer diameter L of the distal end portion 10 of the inlet 3 is constituted by a plurality of illumination lenses in the illumination optical system. It can be formed smaller than. Furthermore, since only one illumination lens is required, production costs can be reduced and assemblability can be improved.
- an endoscope that can illuminate the wide-angle observation range of the observation optical system with sufficient brightness and light distribution without increasing the outer diameter of the end of the endoscope insertion section. can do.
- the boundary between the hard portion 33h and the soft portion 33f of the optical fiber bundle 33b, that is, the rear end of the hard portion 33h is located closer to the base end side than the rear end surface of the front hard portion 31 in the insertion axis direction.
- a part of the optical fiber bundle 33b is disposed in the distal end hard portion 31.
- the operator can grip the hard portion 33h and insert the optical fiber bundle 33b into the distal end hard portion 31, so that the pushing force can be reliably transmitted to the distal end of the optical fiber bundle 33b.
- assemblability can be improved.
- the illumination lens has been described by taking the illumination lens 11 as an example.
- the present invention is not limited to this, and the illumination lens 12 or the illumination lens 13 may be used.
- the same effects as those of the embodiment of the present invention can be obtained.
- An observation optical system having a wide viewing angle which is provided on the distal end surface in the insertion axis direction of the insertion portion and is used when observing the inside of a body cavity;
- a plurality of illumination optical systems provided on an axis inclined with respect to the insertion axis direction of the insertion portion and used for illuminating a body cavity;
- An endoscope wherein the illumination lens of at least one of the plurality of illumination optical systems is a lens subjected to light diffusion processing.
- the lens subjected to the light diffusion processing has a small number of surfaces except for the surface facing the observation site in the body cavity. 3.
- An observation optical system having an insertion portion, which is disposed in the insertion axis direction of the insertion portion and is used for observing the inside of a body cavity, is an endoscope having a wide-angle viewing angle.
- At least one illumination optical system provided on a distal end surface of an axis of the insertion portion inclined with respect to the insertion axis direction, and used for illuminating a body cavity;
- An optical fiber bundle connected to a rear end of the at least one illumination lens and having a hard part in the front in the insertion axis direction and a soft part in the rear in the insertion axis direction;
- a hard portion disposed on the insertion portion and gripping the optical fiber bundle
- An endoscope wherein a rear end portion of the hard portion of the optical fiber bundle is disposed closer to a base end side than a rear end surface of the hard portion in the insertion axis direction.
- the endoscope according to the present invention is used in the medical field and the like, and is preferably applied to a wide-angle endoscope or the like in which the observation optical system has a wide-angle viewing angle.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04807099.9A EP1695654B1 (en) | 2003-12-17 | 2004-12-15 | Endoscope |
US11/453,108 US7794397B2 (en) | 2003-12-17 | 2006-06-14 | Endoscope having an illumination lens subjected to light diffusion process |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003420093A JP2005177025A (ja) | 2003-12-17 | 2003-12-17 | 内視鏡 |
JP2003-420093 | 2003-12-17 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/453,108 Continuation US7794397B2 (en) | 2003-12-17 | 2006-06-14 | Endoscope having an illumination lens subjected to light diffusion process |
Publications (1)
Publication Number | Publication Date |
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WO2005058148A1 true WO2005058148A1 (ja) | 2005-06-30 |
Family
ID=34697205
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/018740 WO2005058148A1 (ja) | 2003-12-17 | 2004-12-15 | 内視鏡 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7794397B2 (ja) |
EP (1) | EP1695654B1 (ja) |
JP (1) | JP2005177025A (ja) |
KR (1) | KR20060108716A (ja) |
CN (2) | CN100374070C (ja) |
WO (1) | WO2005058148A1 (ja) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005177025A (ja) * | 2003-12-17 | 2005-07-07 | Olympus Corp | 内視鏡 |
JP4916164B2 (ja) * | 2005-12-02 | 2012-04-11 | オリンパスメディカルシステムズ株式会社 | 内視鏡 |
JP5340557B2 (ja) * | 2007-05-08 | 2013-11-13 | オリンパスメディカルシステムズ株式会社 | カプセル型医療装置 |
US8360964B2 (en) * | 2007-12-10 | 2013-01-29 | Stryker Corporation | Wide angle HDTV endoscope |
JP2011215425A (ja) * | 2010-03-31 | 2011-10-27 | Fujifilm Corp | 照明レンズ及び該照明レンズを備えた内視鏡 |
WO2015107844A1 (ja) | 2014-01-15 | 2015-07-23 | オリンパス株式会社 | 内視鏡装置 |
CN109661192B (zh) * | 2016-12-26 | 2021-10-26 | 奥林巴斯株式会社 | 立体摄像单元 |
CN107981831A (zh) * | 2017-12-21 | 2018-05-04 | 深圳开立生物医疗科技股份有限公司 | 一种内窥镜头端部结构及内窥镜 |
US11213191B2 (en) * | 2018-01-25 | 2022-01-04 | Canon U.S.A., Inc. | Optical fiber arrangement for endoscope |
JP2019130155A (ja) * | 2018-02-01 | 2019-08-08 | 株式会社フジクラ | 内視鏡 |
US20200268238A1 (en) * | 2018-12-21 | 2020-08-27 | Ambu A/S | Articulated tip part for an endoscope |
EP3705019A1 (en) * | 2019-03-04 | 2020-09-09 | Ambu A/S | Tip part for an endoscope |
CN114019671A (zh) * | 2021-11-18 | 2022-02-08 | 深圳英美达医疗技术有限公司 | 一种大视场角的硬式内窥镜 |
TWI803065B (zh) * | 2021-11-23 | 2023-05-21 | 醫電鼎眾股份有限公司 | 方便組裝的內視鏡鏡頭組合 |
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JPS5620428A (en) * | 1979-07-27 | 1981-02-26 | Olympus Optical Co | Lighting optical system for endoscope |
JPS57125731A (en) * | 1981-01-26 | 1982-08-05 | Olympus Optical Co | Illumination system for endoscope |
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JP2593430B2 (ja) * | 1984-05-02 | 1997-03-26 | オリンパス光学工業株式会社 | 内視鏡用照明光学系 |
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CN2730319Y (zh) * | 2003-11-12 | 2005-10-05 | 奥林巴斯株式会社 | 内窥镜 |
JP2005177025A (ja) * | 2003-12-17 | 2005-07-07 | Olympus Corp | 内視鏡 |
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JP4559149B2 (ja) * | 2004-07-23 | 2010-10-06 | オリンパス株式会社 | 照明光学系、照明光学系を用いた照明装置、及び照明光学系又は照明光学系を用いた照明装置を用いた観察システム |
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2003
- 2003-12-17 JP JP2003420093A patent/JP2005177025A/ja active Pending
-
2004
- 2004-11-01 CN CNB2004100887685A patent/CN100374070C/zh active Active
- 2004-11-01 CN CNU2004201120248U patent/CN2774382Y/zh not_active Expired - Lifetime
- 2004-12-15 WO PCT/JP2004/018740 patent/WO2005058148A1/ja not_active Application Discontinuation
- 2004-12-15 EP EP04807099.9A patent/EP1695654B1/en not_active Expired - Fee Related
- 2004-12-15 KR KR1020067011869A patent/KR20060108716A/ko not_active Application Discontinuation
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- 2006-06-14 US US11/453,108 patent/US7794397B2/en active Active
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JP2000193894A (ja) * | 1998-12-25 | 2000-07-14 | Olympus Optical Co Ltd | 内視鏡用照明光学系 |
JP2001258823A (ja) * | 2000-03-14 | 2001-09-25 | Olympus Optical Co Ltd | 内視鏡 |
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See also references of EP1695654A4 * |
Also Published As
Publication number | Publication date |
---|---|
KR20060108716A (ko) | 2006-10-18 |
CN1628598A (zh) | 2005-06-22 |
US7794397B2 (en) | 2010-09-14 |
EP1695654B1 (en) | 2016-09-14 |
US20060235276A1 (en) | 2006-10-19 |
EP1695654A4 (en) | 2014-11-19 |
CN2774382Y (zh) | 2006-04-26 |
JP2005177025A (ja) | 2005-07-07 |
EP1695654A1 (en) | 2006-08-30 |
CN100374070C (zh) | 2008-03-12 |
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