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WO2009150653A1 - Système optique pour endoscope - Google Patents

Système optique pour endoscope Download PDF

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Publication number
WO2009150653A1
WO2009150653A1 PCT/IL2009/000586 IL2009000586W WO2009150653A1 WO 2009150653 A1 WO2009150653 A1 WO 2009150653A1 IL 2009000586 W IL2009000586 W IL 2009000586W WO 2009150653 A1 WO2009150653 A1 WO 2009150653A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
optical system
lens unit
endoscope
interfaces
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/IL2009/000586
Other languages
English (en)
Inventor
Tzvi Phillip
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.)
GI View Ltd
Original Assignee
GI View Ltd
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 GI View Ltd filed Critical GI View Ltd
Publication of WO2009150653A1 publication Critical patent/WO2009150653A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • 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
    • A61B1/00177—Optical arrangements characterised by the viewing angles for 90 degrees side-viewing
    • 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
    • G02B23/2407—Optical details
    • G02B23/2423—Optical details of the distal end
    • G02B23/243—Objectives for endoscopes

Definitions

  • the present invention is generally in the field of medical devices, and relates to an optical system and method for use in an endoscope. Specifically, the present invention relates to enhancing viewing through an endoscope.
  • Endoscopes are used to view internal organs in a minimally invasive way.
  • endoscopes incorporate a system of lenses for transmitting an image of the organ under inspection, to the viewer.
  • PCT Publication WO 05/065044 to Cabiri et al. assigned to the assignee of the present patent application describes apparatus for use with a biologically- compatible-fluid pressure source, the apparatus including an elongate carrier, adapted to be inserted through a proximal opening of a body lumen, and a piston head coupled to a distal portion of the carrier.
  • the piston head is adapted to form a pressure seal with a wall of the lumen after the carrier has been inserted into the lumen, and to be advanced distally through the body lumen in response to pressure from the fluid pressure source.
  • the apparatus is configured to facilitate distal advancement of the piston head by facilitating passage of fluid out of the lumen from a site within the lumen distal to the piston head.
  • the apparatus additionally includes an optical system, coupled to the carrier in a vicinity of the distal portion, the optical system having distal and proximal ends.
  • US Patent Application Publication 2008/0097292 to Cabiri et al. assigned to the assignee of the present patent application describes apparatus for use with a biologically-compatible-fluid pressure source, the apparatus including an elongate carrier, adapted to be inserted through a proximal opening of a body lumen, and a piston head coupled to a distal portion of the carrier.
  • the apparatus is described as additionally including an optical system, coupled to the carrier in a vicinity of the distal portion, the optical system having distal and proximal ends.
  • the optical system includes an image sensor, positioned at the proximal end of the optical system; an optical member having distal and proximal ends, and shaped so as to define a lateral surface, at least a distal portion of which is curved, configured to provide omnidirectional lateral viewing; and a convex mirror, coupled to the distal end of the optical member, wherein the optical member and the mirror have respective rotational shapes about a common rotation axis.
  • US Patent Application Publication 2004/0249247 to Iddan describes an endoscope capable of capturing images of an in-vivo area behind a distal end of the endoscope's tube.
  • the endoscope is described as having an imaging unit that may, for example, include a reflective surface that reflects an image of an area surrounding such tube onto an image sensor.
  • Other optical systems are described for imaging behind one end of an endoscope or imaging device.
  • US Patent 5,313,306 to Kuban et al. describes an endoscopic-type device for omnidirectional image viewing providing electronic pan-and-tilt orientation, rotation, and magnification within a selected field-of-view for use in applications in various environments such as in internal medicine inspection, monitoring, and surgery.
  • the imaging device (using optical or infrared images) is based on the effect that the image from a wide angle lens, which produces a circular image of an entire field-of-view, can be mathematically corrected using high speed electronic circuitry. More specifically, an incoming image from an endoscope image acquisition source, including a wide angle lens, is transmitted through an image conduit and captured by a camera that produces output signals according to that image. A transformation of these output signals is performed for the viewing region of interest and viewing direction, and a corrected image is output as a video image signal for viewing, recording, or analysis. Multiple simultaneous images are described as being output from a single input image.
  • Such optical system should enable high-quality imaging a region of interest with a more than 180 degree field of view, while being sufficiently small in size and defining a sufficiently short optical path of the collected light propagating through the system to an imaging detector.
  • lenses capable of collecting light with more than 180 degree numerical aperture are known and used in photography equipment, for example Nikon produces the 6 mm Nikkor fisheye lens; the lens is described as having a picture angle of 220 degrees.
  • IPIX corporation produces the IPIX 4.88 mm fisheye lens, which is described as providing 185 degrees of coverage.
  • fisheye lens are inappropriate in endoscopic systems, because of their too large sizes.
  • a problem with the conventional systems of the kind specified is the typical use of mirrors. This unavoidably increases the system size.
  • the size of the optical system is a critical parameter for various applications, especially medical ones, for example endoscopic imaging.
  • the present invention provides a small-size optical system for use with an endoscope.
  • the optical system collects light and focuses it onto an imaging sensor.
  • An endoscope tube is coupled to the image sensor.
  • the optical system comprises a light collecting and focusing lens unit located inside the endoscope tube and formed by a plurality of lenses accommodated along the endoscope.
  • a - A - collection surface of the lens unit is configured for collecting light with more than 180-degree collection angle (field of view) and protrudes from a distal end of the endoscope to be exposed to light coming from the region of interest. Light collected through the collecting surface is conveyed by the optical system onto a focal spot on the image sensor.
  • proximal and distal should be understood as being with respect to the physician.
  • the optical system is configured for "direct imaging" of the collected light onto a focal spot, which means that there is no transfer of a virtual image onto intermediate imaging plane(s), as for example in relay optics.
  • the optical system of the present invention is configured to define multiple spaced-apart substantially refractive interfaces (with substantially no reflection of light therefrom, i.e. mirrorless arrangement) configured and arranged to define together a predetermined refractive index profile along an optical axis of the optical system.
  • the arrangement of refractive interfaces is selected so as to provide direct imaging of light collected with a predetermined field of view, being higher than 180 degrees, onto a desirably small, high quality (reduced aberrations and image blur), focal spot on the imaging sensor, with the fixed focal plane location and with no need for moving any of said refractive interfaces.
  • the optical system of the present invention is configured with a fixed focus configuration.
  • These refractive interfaces arranged in a spaced-apart relationship in the optical path of light are formed by surfaces of a plurality of separate lens elements (i.e. single-lens elements, no doublets).
  • the use of separate lens elements eliminates a need for any adhesive material in the optical path of light, thus improving the image quality.
  • a number of the lens elements, their geometry (shape), spaces between the lens element, as well as material(s) from which the lens elements are made define together the arrangement of the refractive interfaces along the collecting and focusing lens unit. All these parameters are appropriately selected to ensure that the refractive interfaces operate together to provide a predetermined refractive index profile along the optical path defined by the arrangement of said lens elements and accordingly the refractive interfaces and an incident angle of light on each of the interfaces during the light propagation through the optical system, i.e. appropriately bend the light propagation path through the lens unit.
  • the outer surface of the lens unit through which light is collected has a curved geometry thus collecting light from surroundings with a solid collection angle of about 180 degree and higher, generally about 180-220-degree solid angle of light collection.
  • the larger field of view corresponds to the higher F# of the system (due to the larger angular region from which the light is being collected). Considering the field of view of 180-220 degrees, the F# is about 7.4.
  • the optical system configuration of the present invention is selected such that the total track of the optical system is about a few tens of millimeters, e.g. 26 mm length and about 12 mm to 30 mm cross-section.
  • the lens elements of the optical system of the present invention are made of glass materials. This enables sterilization thereof (at temperature of about 130°C) and therefore the optical system can be reused, rather than being disposable as typically in conventional endoscopic systems.
  • an optical system to be used with an endoscope for insertion into a body lumen of a subject; said optical system comprising a light collecting and focusing lens unit configured to collect light from a region of interest and to focus said light onto a focal spot; said light collecting and focusing lens unit comprises a plurality of separate lens elements defining together an arrangement of spaced-apart substantially refractive interfaces accommodated along an optical axis of the system, said arrangement of interfaces comprising a light collection surface configured with a predetermined curvature capable of collecting light from the region of interest to which it is exposed with a field of view of 180 and higher degrees.
  • the interfaces arrangement includes substantially refractive interfaces configured and arranged to define together a predetermined refractive index profile along said optical axis to appropriately bend a light propagation path through said lens unit.
  • the predetermined refractive index profile along the optical path is defined by a selected number of the refractive interfaces; a distance (air space) between them; the geometry of the lens elements defining said interfaces; and a material from which the lens elements are made.
  • the interfaces arrangement is configured for direct imaging of light collected with more than 180 degrees field of view onto said focal spot.
  • the lens unit is configured to define the focal spot at a fixed focal plane location with the predetermined field of view.
  • the lens elements may be made of at least one transparent material selected from plastic, acrylic resin, polystyrene, cycloolefin, cycloolefin copolymer, polysulfone, and a polycarbonate.
  • the lens elements are made of glass. This allows reusage of the lens unit, after sterilization.
  • the lens element defining the light collection surface may for example have a cross sectional dimension substantially not exceeding 30 mm, more preferably, not exceeding 20 mm.
  • the curvature of the collection surface may be characterized by a radius in a range of about 10 mm to 20 mm, more preferably in a range of 12 mm to 17 mm.
  • the surface area of the collection surface exposed to the region of interest may be in a range of about 600 mm to 1000 mm , more preferably in a range of about 750 mm to 850 mm .
  • the lens unit is preferably configured to define a length of the optical path from the collection surface to the focal plane of about a few tens of millimeters.
  • the optical system may have the optical path length of about 26 mm and a cross-sectional dimension in a range of about 12 mm to 30 mm.
  • optical system enables it to be used as the single optical system in an endoscope, i.e. the system capable of imaging a region in front of the distal end of the endoscope and also implementing a so-called "back-imaging".
  • an apparatus comprising: an endoscope configured for insertion into a body lumen of a subject to be exposed to light coming from a region of interest; an image sensor to be coupled to said endoscope; and a single optical system comprising a light collecting and focusing lens unit configured to collect light from the region of interest and to focus said light onto a focal spot on the image sensor; said light collecting and focusing lens unit comprises a plurality of separate lens elements defining together an arrangement of spaced-apart substantially refractive interfaces accommodated along an optical axis of the system, said arrangement of interfaces comprising a light collection surface configured with a predetermined curvature capable of collecting light from the region of interest to which it is exposed with a field of view of 180 and higher degrees.
  • the apparatus preferably includes an illumination system, which may include a plurality of light sources, e.g. including one or more light emitting diodes.
  • FIG. 1 is a schematic illustration of an optical system that protrudes from a distal end of an endoscope, in accordance with an embodiment of the present invention
  • Fig. 2 is a schematic illustration of the optical system of Fig. 1, in accordance with an embodiment of the present invention
  • Fig. 3 is a graph showing the modulus of the optical transfer function of the optical system of Fig. 2, as a function of frequency, the optical system being in accordance with an embodiment of the present invention
  • Fig. 4 is a schematic illustration of the optical system of Fig. 1, in accordance with an alternative embodiment of the present invention.
  • Fig. 5 is a graph showing the modulus of the optical transfer function of the optical system of Fig. 4, as a function of frequency, the optical system being in accordance with an embodiment of the present invention.
  • FIG. 1 is a schematic illustration of an example of an apparatus, generally designated 100, including an endoscope 22 configured for insertion into a body lumen of a subject to be exposed to light coming from a region of interest, an optical system 20 of the present invention accommodated inside the endoscopic tube, and an image sensor 26 coupled to the endoscope.
  • the present invention is used in a colonoscope- endoscope and is therefore described below with respect to this specific application. It should however be understood that the invention is not limited to this specific example, and the principles of the invention may be used in other type endoscopes and in generally in any imaging system.
  • Such colonoscope- endoscope may for example be configured and operable as described in WO 05/065044 to the assignee of the present patent application, incorporated by reference herein with respect to this specific example.
  • a piston head 32 of an endoscope as described in the above-mentioned PCT application is advanced into a subject's colon 35.
  • optical system 20 is coupled to a distal end of the piston head 32.
  • the light collection surface 28A is an external surface of a ray- capturing lens 28 which is appropriately configured (i.e. has a predetermined curvature) to define a field of view greater than 180 degrees (generally of about 180 degrees or higher but preferably not less than 220 degrees).
  • optical system 20 is configured to convey light from the region of interest, collected by surface 28 A, to image sensor 26, by using substantially refractive interfaces, i.e. without utilizing reflection of the light by any element of the optical system 20.
  • Image sensor 26 may be of any known suitable type capable of receiving light and generating output data indicative of a detected image. This output data is transmitted to a viewing station outside the subject's body, via a cable 30, or wireless signal transmission as the case may be.
  • optical system 20 and image sensor 26 are housed in a housing 24.
  • the optical system is configured to be reusable by sterilization between uses (e.g. at 130 0 C temperature); and may be detachable from the endoscope, as well as may be e.g. together with the image sensor, be removed from the housing.
  • endoscope 22 includes an illumination system 34.
  • the illumination system may comprise a plurality of light sources 36, which are configured to illuminate the entire field of view of lens 28.
  • the light sources include one or more light emitting diodes.
  • the light emitting diodes are arranged upon a printed circuit board 38 in a circular array so as to be around the region of interest.
  • Optical system 20 includes a light collecting and focusing lens unit formed by a plurality of separate (not attached to one another) lens elements, which are configured and arranged to define a predetermined arrangement of spaced-apart refractive interfaces accommodated along the optical axis OA of the system.
  • the lens units include ray-capturing lens 28, a set 40 of correction and scaling lenses (42, 44, 46, 48 and 50), and an aperture stop 52 in between the scaling lenses 46 and 48.
  • a cover glass 54 that covers an image sensor it is located on the last surface of 54
  • Ray-capturing lens 28 has a geometry defining an input, light collection surface 28 A (distal surface) and an output surface 28B (proximal surface) both being appropriately curved.
  • the curvature of light collection surface 28A (defined by its cross sectional dimension D, and a radius of curvature), which in turn defines a surface area of the surface exposed to the region of interest, is selected to collect light with 180 degrees solid angle (field of view) or higher In some embodiments, the field of view is up to 220 degrees.
  • the surface area (i.e. total area of the exposed optic surface) of ray- capturing lens 28 is in the range of about 600 mm 2 to 1000 mm 2 , in particular in the range of about 750 mm 2 and 850 mm 2 .
  • Each lens unit defines distal and proximal surfaces (e.g. lens 28 defines surfaces 28A, 28B, lens 42 defines surfaces 42A, 42B, etc.), and the lenses are made of selected material(s) such that these surface act as the refractive interfaces.
  • the lens elements are selected to provide the arrangement of the refractive interfaces defining together a predetermined refractive index profile along the optical axis OA to appropriately bend the light propagation path through the lens unit.
  • the configuration of the elements is preferably selected to reduce aberrations of light propagating through the lens unit.
  • Table 1 providing the properties of the surfaces of the lenses according to a specific but not limiting example of the invention. Table 1:
  • one or more lenses of optical system 20 are made of one or more materials from the following plastic, an acrylic resin, polystyrene, cycloolefin, cycloolefin copolymer, polysulfone, and/or a polycarbonate.
  • one or more of the lenses are made of glass. As indicated above, this facilitates sterilization of the lens unit, thus enabling its reusage.
  • a cross sectional dimension (termed herein below as diameter) D of ray-capturing lens 28 is less than 30 mm, e.g., less than 20 mm.
  • the radius of curvature of light collection surface 28A is in the range of about 10 mm to 20 mm, e.g., 12 mm to 17 mm.
  • the graph shows the optical performance of the system as a function of increasing frequency, i.e. resolution.
  • the performance decreases (becomes poorer) at higher resolution values as is common in all real optical systems.
  • optical system 20 includes ray-capturing lens 28 collecting light with up to about 220 degrees collection angle , a set 64 of correction and scaling lenses (66, 68, 70, 72, and 74), and an aperture stop 76; also a cover glass 78 associated with an image sensor (not shown) is provided.
  • planar-surfaces lens elements 48 and 50 of Fig. 2 are replaced by lens elements 72 and 74 defining two (or more) aspheric surfaces 80 and 82.
  • Table 2 below specifies the parameters and properties of the lenses of optical system 20 in the example of Fig. 4.
  • optical system 20, as shown in Fig. 4 is generally similar to that shown in Fig. 2.
  • Fig. 5 is a graph showing the MTF of optical system 20 of Fig. 4 with the parameters as provided in Table 2.
  • the graphs in Figs. 3 and 5 are slightly different as they correspond to the use of different lens elements' materials, plastic in Fig. 3 and glass in Fig. 5 and different lens shape and lens spacing so the performances of the systems are different as well.

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

Abstract

La présente invention concerne un système optique apte à être utilisé avec un endoscope destiné à être introduit dans une lumière corporelle d'un sujet. Ledit système optique comprend une unité formant lentille de captage et de concentration de la lumière, conçue pour capter la lumière émanant d'une région d'intérêt et concentrer ladite lumière en un point focal ; ladite unité formant lentille de captage et de concentration de la lumière comprend une pluralité d'éléments indépendants formant lentilles qui définissent ensemble un agencement d'interfaces séparées sensiblement réfractives disposées le long d'un axe optique du système et définissant ensemble un profil d'indice de réfraction prédéterminé le long dudit axe optique pour courber de façon appropriée un trajet de propagation de la lumière à travers ladite unité formant lentille, ledit agencement d'interfaces comprenant une surface de captage de la lumière conçue avec une courbure prédéterminée capable de capter la lumière émanant de la région d'intérêt à laquelle elle est exposée avec un champ supérieur ou égal à 180 degrés, et des surfaces de transport de la lumière.
PCT/IL2009/000586 2008-06-12 2009-06-14 Système optique pour endoscope Ceased WO2009150653A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13205808P 2008-06-12 2008-06-12
US61/132,058 2008-06-12

Publications (1)

Publication Number Publication Date
WO2009150653A1 true WO2009150653A1 (fr) 2009-12-17

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011117618A1 (de) * 2011-11-04 2013-05-08 Hommel-Etamic Gmbh Vorrichtung zur Abbildung der Innenfläche eines Hohlraumes in einem Werkstück
CN106168705A (zh) * 2016-04-04 2016-11-30 上海大学 一种可安装于胃镜装置的大视场鱼眼镜头
CN106264428A (zh) * 2015-05-20 2017-01-04 赛诺微医疗科技(北京)有限公司 一种可重复进行高温高压灭菌的医用内窥镜
CN109557656A (zh) * 2017-09-27 2019-04-02 富士胶片株式会社 内窥镜用对物光学系统及内窥镜
US10330915B2 (en) 2015-08-12 2019-06-25 Jenoptik Industrial Metrology Germany Gmbh Borehole inspection device
EP3767364B1 (fr) * 2019-07-19 2024-04-24 Hoya Corporation Endoscope à grand champ de vision

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JPH10288742A (ja) * 1997-04-16 1998-10-27 Olympus Optical Co Ltd 内視鏡装置
US6449103B1 (en) * 1997-04-16 2002-09-10 Jeffrey R. Charles Solid catadioptric omnidirectional optical system having central coverage means which is associated with a camera, projector, medical instrument, or similar article
WO2008004377A1 (fr) * 2006-07-03 2008-01-10 Olympus Corporation Système optique
WO2008007498A1 (fr) * 2006-07-10 2008-01-17 Olympus Corporation Élément optique transmissif et système optique utilisant cet élément

Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
JPH10288742A (ja) * 1997-04-16 1998-10-27 Olympus Optical Co Ltd 内視鏡装置
US6449103B1 (en) * 1997-04-16 2002-09-10 Jeffrey R. Charles Solid catadioptric omnidirectional optical system having central coverage means which is associated with a camera, projector, medical instrument, or similar article
WO2008004377A1 (fr) * 2006-07-03 2008-01-10 Olympus Corporation Système optique
EP2037307A1 (fr) * 2006-07-03 2009-03-18 Olympus Corporation Système optique
WO2008007498A1 (fr) * 2006-07-10 2008-01-17 Olympus Corporation Élément optique transmissif et système optique utilisant cet élément
EP2056150A1 (fr) * 2006-07-10 2009-05-06 Olympus Corporation Élément optique transmissif et système optique utilisant cet élément

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202011111089U1 (de) 2011-11-04 2019-06-13 Jenoptik Industrial Metrology Germany Gmbh Vorrichtung zur Abbildung der Innenfläche eines Hohlraumes in einem Werkstück
EP2589953A2 (fr) 2011-11-04 2013-05-08 Hommel-Etamic GMBH Dispositif de représentation imagée de la surface intérieure dýun espace creux dans une pièce usinée
US9395310B2 (en) 2011-11-04 2016-07-19 Hommel-Etamic Gmbh Device for imaging the inner surface of a cavity in a workpiece
DE102011117618A1 (de) * 2011-11-04 2013-05-08 Hommel-Etamic Gmbh Vorrichtung zur Abbildung der Innenfläche eines Hohlraumes in einem Werkstück
DE102011117618B4 (de) 2011-11-04 2019-07-18 Jenoptik Industrial Metrology Germany Gmbh Vorrichtung zur Abbildung der Innenfläche eines Hohlraumes in einem Werkstück
CN106264428A (zh) * 2015-05-20 2017-01-04 赛诺微医疗科技(北京)有限公司 一种可重复进行高温高压灭菌的医用内窥镜
US10330915B2 (en) 2015-08-12 2019-06-25 Jenoptik Industrial Metrology Germany Gmbh Borehole inspection device
CN106168705A (zh) * 2016-04-04 2016-11-30 上海大学 一种可安装于胃镜装置的大视场鱼眼镜头
CN106168705B (zh) * 2016-04-04 2019-06-04 上海大学 一种可安装于胃镜装置的大视场鱼眼镜头
CN109557656A (zh) * 2017-09-27 2019-04-02 富士胶片株式会社 内窥镜用对物光学系统及内窥镜
CN109557656B (zh) * 2017-09-27 2021-12-24 富士胶片株式会社 内窥镜用对物光学系统及内窥镜
EP3767364B1 (fr) * 2019-07-19 2024-04-24 Hoya Corporation Endoscope à grand champ de vision
US12386169B2 (en) 2019-07-19 2025-08-12 Hoya Corporation Wide field of view objective lens

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