WO2005102146A1 - 内視鏡及び内視鏡システム - Google Patents
内視鏡及び内視鏡システム Download PDFInfo
- Publication number
- WO2005102146A1 WO2005102146A1 PCT/JP2005/007924 JP2005007924W WO2005102146A1 WO 2005102146 A1 WO2005102146 A1 WO 2005102146A1 JP 2005007924 W JP2005007924 W JP 2005007924W WO 2005102146 A1 WO2005102146 A1 WO 2005102146A1
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- WIPO (PCT)
- Prior art keywords
- endoscope
- illumination
- range
- observation
- optical system
- Prior art date
Links
- 238000005286 illumination Methods 0.000 claims abstract description 169
- 230000003287 optical effect Effects 0.000 claims abstract description 99
- 238000003780 insertion Methods 0.000 claims abstract description 11
- 230000037431 insertion Effects 0.000 claims abstract description 11
- 238000003384 imaging method Methods 0.000 claims description 111
- 230000001678 irradiating effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 12
- 230000005855 radiation Effects 0.000 description 12
- 238000011282 treatment Methods 0.000 description 10
- 238000012545 processing Methods 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000005452 bending Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 210000002429 large intestine Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000002040 relaxant effect Effects 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
-
- 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
- A61B1/042—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 a proximal camera, e.g. a CCD camera
-
- 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
-
- 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
-
- 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
- G02B23/2461—Illumination
Definitions
- the present invention relates to an endoscope, and more particularly, to an endoscope system including two endoscopes having different viewing angles.
- endoscopes have been widely used in the medical field and the like.
- the endoscope observes organs and the like in the body cavity by inserting a slender insertion section into the body cavity, and performs various treatments using a treatment tool inserted into the treatment tool communication channel as necessary. be able to.
- a bending section is provided at the distal end of the insertion section, and the operating direction of the endoscope can be changed by operating the operating section of the endoscope.
- the viewing angle of a conventional endoscope is, for example, 140 degrees, and an operator observes the inside of a body cavity using an observation image of the viewing angle.
- an operator observes the inside of a body cavity using an observation image of the viewing angle.
- it is possible to observe a part outside the visual field by bending the curved part.
- Patent Document 1 JP-A-4 102432
- the endoscope with a wide viewing angle is capable of imaging a wider range than the endoscope with a normal viewing angle.
- the illuminating light is not applied to the periphery of the imaging range, and the periphery of the monitor screen that reflects the imaging range is also displayed dark.
- a user who uses a wide-angle endoscope with a wide-angle viewing angle before and after using the normal-viewing-angle endoscope can use each of the normal endoscope and the wide-angle endoscope that are displayed on the same monitor screen. There may be a sense of discomfort due to the difference in brightness between the central part and the peripheral part of the imaging range.
- the present invention when an endoscope with a normal viewing angle and an endoscope with a wide angle are used, a predetermined illuminance of illumination light can be distributed to a peripheral portion of an imaging range, and a monitor screen is displayed.
- the objective of the present invention is to provide a highly observable endoscope system by reducing the difference between the light and dark portions of the image projected on the screen.
- An endoscope system includes a first endoscope including a first observation optical system having a first viewing angle, a first illumination optical system, and the first endoscope.
- a second illumination optical system having a second viewing angle wider than the viewing angle of the first endoscope and the second endoscope.
- the second irradiation range of the illumination light having a predetermined illuminance irradiated by the second illumination optical system is set.
- the present invention is characterized in that it is wider than a first irradiation range having the above-mentioned predetermined illuminance irradiated by the first illumination optical system.
- the endoscope system of the present invention when using an endoscope with a normal viewing angle and an endoscope with a wide angle, the difference in brightness between the respective imaging surfaces projected on the monitor screen is reduced. An endoscope system with high observability can be realized.
- FIG. 1 is an explanatory diagram schematically showing an endoscope system according to a first embodiment.
- FIG. 2 is a front view of a distal end surface of a distal end portion of the endoscope.
- FIG. 3 is a cross-sectional view of a distal end portion of the endoscope cut in a longitudinal axis direction.
- FIG. 4 is a block diagram showing a main configuration of the endoscope system according to the first embodiment.
- FIG. 5 is a cross-sectional view of the distal end of the first endoscope cut in the longitudinal direction so as to pass through the centers of the respective windows of the illumination window and the first observation window.
- FIG. 6 is a cross-sectional view of the distal end of the second endoscope cut in the longitudinal direction so as to pass through the centers of the respective windows of the illumination window and the second observation window.
- FIG. 7 shows an imaging range in which a plane at an arbitrary imaging distance is imaged by the first endoscope. It is a figure for explaining the state where a frame is displayed on a monitor screen.
- FIG. 8 is a diagram for explaining a state in which an imaging range in which a plane at an arbitrary imaging distance is imaged by the second endoscope lb is displayed on a monitor screen.
- FIG. 9 is a diagram for explaining a state in which an imaging range in which a plane at an arbitrary imaging distance is imaged by the second endoscope lb is displayed on a monitor screen.
- FIG. 10 is a diagram for explaining a state in which an imaging range at an arbitrary imaging distance is displayed on a monitor screen by the second endoscope.
- FIG. 11 is a cross-sectional view of the distal end of the second endoscope according to the second embodiment cut in the longitudinal direction so as to pass through the centers of the respective windows of the illumination window and the second observation window.
- FIG. 12 is a diagram for explaining a state in which an imaging range in which a plane at an arbitrary imaging distance is imaged by the second endoscope is displayed on a monitor screen.
- Video processor 11 11 ...
- Timing signal generation circuit ... Display image switching input circuit
- FIG. 1 is an explanatory diagram schematically showing an endoscope system 100 according to an embodiment of the present invention.
- a first endoscope la and a second endoscope lb (hereinafter, referred to as an endoscope 1 unless otherwise distinguished) have a bending operation and a pipeline system.
- the connector section 4 is connected to a light source device 5 as an external device and a processor 11 via a predetermined connector.
- the processor 11 is connected to the monitor 7. Note that the first endoscope 1a and the second endoscope lb are connected to the processor 11 and the light source device 5 by using a connector or the like as necessary, or the processor 11 and the light source device 5 each with a connector Are always connected, and the connection can be switched by a switching switch (not shown).
- the insertion portion 3 includes a flexible tube portion 8 having flexibility, a curved portion 9 provided on the distal end side of the flexible tube portion 8, and a distal end provided on the distal end side of the curved portion 9. Section 10 is provided.
- the distal end portion 10 has a built-in solid-state imaging device 22 (see FIG. 2) for imaging a site in a body cavity.
- An image signal of a part in the body cavity captured by the solid-state imaging device 22 provided in the distal end portion 10 is transmitted to the processor 11 via the universal code 3a.
- the processor 11 displays an observation image of the captured region on a monitor screen 7a of the monitor 7 which is a display unit connected based on a signal obtained by processing the transmitted image signal.
- the operation unit 2 is provided with an operation knob (not shown) for remotely bending the bending unit 9.
- an operation knob for remotely bending the bending unit 9.
- FIG. 2 is a front view of a distal end face 10A of a distal end portion 10 of the endoscope 1
- FIG. 3 is a cross-sectional view of the distal end portion 10 of the endoscope 1 cut in a longitudinal axis direction.
- an optical member for observation (hereinafter, referred to as an observation window) is provided on the distal end surface 10A of the distal end portion 10 (the observation window of the first endoscope la is first observed).
- Window 15a, the observation window of the second endoscope lb is a second observation window 15b), and two illumination optical members arranged around the observation window (hereinafter referred to as illumination windows).
- 50, 55 (the first endoscope la has two illumination windows 50a, 55a, and the second endoscope lb has two illumination windows 50b, 55b) and the procedure
- a water supply / air supply nozzle 18 for supplying and supplying water to / from the observation window 15 and a front water supply opening 19 are provided.
- first endoscope la and the second endoscope lb can be connected to the same external device, here, at least the processor 11 and the light source device 5, at least.
- the distal end portion 10 of the endoscope 1 includes a distal end cap 10B and a cylindrical exterior 10C, and is provided inside the distal end surface 10A of the distal end cap 10B.
- the optical system is composed of a plurality of optical lenses and has an observation optical system 21 having a viewing angle ⁇ in a fixed or widest state (the first endoscope la is the first observation optical system).
- the second endoscope lb has the viewing angle oc2 of the second observation optical system 21b.).
- a solid-state image sensor 22 is arranged at an image forming position of the observation optical system 21.
- a circuit board 23 having a circuit function of driving and controlling the solid-state imaging device 22 and taking in an imaging signal generated by photoelectric conversion is connected.
- the circuit board 23 has a CDS circuit 35 and an analog Z digital conversion circuit 36 described later, and a signal cable 24 is connected thereto. The proximal end of the signal cable 24 is connected to the processor 11.
- the first endoscope la can, for example, capture an image of a viewing range of a viewing angle OC 1 in a state where the viewing angle is fixed at about 140 degrees or the widest angle.
- the second endoscope lb Inside the distal end portion 10 of the second endoscope lb, for example, at a fixed or widest angle of about 170 degrees larger than the viewing angle a1 of the first endoscope la described above.
- An observation optical system 21 having a viewing angle ⁇ 2 ( ⁇ 1 ⁇ «2) is provided inside the distal end portion 10 of the second endoscope lb. That is, the second endoscope lb can image a wider visual field than the first endoscope la.
- FIG. 4 is a block diagram showing a main configuration of the endoscope system 100 according to the present embodiment.
- the endoscope system 100 includes a first endoscope la, a second endoscope lb, a processor 11, a monitor 7, and a light source device 5 (see FIG. 1). Then, the first endoscope la and the second endoscope lb can be connected to the same external device, here, at least one of the processor 11 and the light source device 5. The first endoscope la and the second endoscope lb are applied (configured for observation) to the same site (for example, large intestine) of the subject.
- the first endoscope la mainly includes a first observation optical system 21a including a plurality of lenses having a viewing angle (for example, about 140 degrees) a1 and the first observation optical system 21a.
- the circuit consists of 36).
- the second endoscope lb mainly has a viewing angle (for example, about 170 degrees) larger than that of the first observation optical system 21a of the first endoscope la and a2 (al ⁇ a2).
- a second observation optical system 2 lb composed of a plurality of lenses, and a second solid-state imaging device (hereinafter, referred to as a second CCD) arranged at an image forming position of the second observation optical system 21b and imaging an observation site. 22b), a CDS circuit 35 for performing correlated double sampling processing of the image signal generated by the second CCD 22b, and the analog image signal processed by the CDS circuit 35 is converted into a digital image signal.
- An analog Z-to-digital conversion circuit hereinafter, referred to as an AZD circuit 36.
- the first observation optical system 21a is arranged on the same central axis as the above-mentioned first observation window 15a, and the second observation optical system 21b is connected to the above-mentioned second observation window 15b. They are arranged on the same central axis. In other words, the optical axis of the first observation optical system 21a passes on the central axis of the first observation window 15a, and the optical axis of the second observation optical system 21b passes on the central axis of the second observation window 15b. Pass through.
- the optical axis of the first observation optical system 21a is an axis parallel to the respective central axes of the above-mentioned illumination windows 50a and 55a
- the optical axis of the second observation optical system 21b is the same as the above-mentioned illumination window 50b.
- 55b are parallel to the central axis of each.
- the processor 11 includes a separation processing circuit (hereinafter, referred to as an SZP circuit) 41, a digital signal processing circuit (hereinafter, referred to as a DSP circuit) 42, a character information superimposing circuit 43, a character information input circuit 44, a digital Z Analog signal conversion circuit (hereinafter referred to as DZA circuit) 45, image display signal circuit 46, reference signal generation circuit (hereinafter referred to as SSG) 47, timing signal generation circuit (hereinafter referred to as TZG circuit) 48 and display image Composed of switching input circuit 49
- SZP circuit separation processing circuit
- DSP circuit digital signal processing circuit
- DZA circuit digital Z Analog signal conversion circuit
- SSG reference signal generation circuit
- TZG circuit timing signal generation circuit
- the SZP circuit 41 includes a digital imaging signal from the AZD circuit 36 of the first endoscope la or a luminance signal of a digital imaging signal from the AZD circuit 36 of the second endoscope lb. Separate color signals and the like.
- the DSP 42 performs predetermined digital signal processing on the luminance signal and the chrominance signal separated by the SZP circuit 41, And performs correction processing such as gamma correction to generate digital endoscope image signals.
- the character information superimposing circuit 43 adds a character information signal indicating patient information such as a patient's name, age, gender, endoscope observation date and time to the digital endoscope image signal processed by the DSP circuit 42. Are superimposed.
- a character information signal to be superimposed is generated in the character information input circuit 44 based on patient information input by a surgeon from a keyboard (not shown).
- the digital endoscope image signal on which the character information is superimposed is converted into an analog endoscope image signal in the DZA circuit 45 and output to the image display signal circuit 46.
- the digital endoscopic image signal on which the generated character information signal is superimposed is recorded in a memory 30 detachably provided in the processor 11.
- the image display signal circuit 46 converts the analog endoscope image signal supplied from the DZA circuit 36 into a video signal for displaying observation video and patient information on the monitor 7 based on the analog endoscope video signal.
- the display position of the observation image and the patient information to be displayed on the monitor 7 are changed and set by the control signal from the display image switching input circuit 49.
- the display image switching input circuit 49 allows the operator to input a display switching input such as an observation image to be displayed on the monitor 7 and a display position of patient information.
- the SSG circuit 47 generates and outputs a reference signal for controlling the driving of the SZP circuit 41, the DSP circuit 42, the character information superimposing circuit 43, the digital signal circuit 45, and the image display signal circuit 46.
- the TZG circuit 48 generates a timing signal for drive control of the first CCD 22a and the second CCD 22b of the first endoscope la and the second endoscope lb based on the reference signal from the SSG circuit 47.
- FIG. 5 is a cross-sectional view in which the distal end portion 10 of the first endoscope la is cut in the longitudinal direction so as to pass through the centers of the respective illumination windows 50a and 55a and the first observation window 15a.
- FIG. 6 is a cross-sectional view in which the distal end portion 10 of the second endoscope lb is cut in the longitudinal direction so as to pass through the centers of the respective windows of the illumination windows 50b and 55b and the second observation window 15b.
- the illumination window 50 of the distal end portion 10 of the first endoscope la is provided.
- Each of a and 55a has an illumination lens 53a. From the base end of each illumination lens 53a, a light guide bundle 50A connected to the light source device 5 is inserted into the endoscope 1.
- the illumination windows 50a and 55b and the illumination lens 53a constitute an illumination optical system, and allow illumination light from a light guide bundle, which is an illumination member, to pass therethrough.
- the central axis of the illumination window 50a of the first endoscope la (the central axis of the irradiation range of the illumination light) is the central axis force that is the optical axis of the first observation window 15a. It is provided in the position where it does.
- the illumination window 55a of the first endoscope la is provided at a position where its central axis is separated by a predetermined axial length Lb of the central axial force of the first observation window 15a.
- the central axis of the first observation window 15a is coaxial with the optical axis MA1 of the first observation optical system 21a.
- the central axis of the illumination window 50a is coaxial with the central axis LA1 of the illumination light irradiation range
- the central axis of the illumination window 55a is coaxial with the central axis LA2 of the illumination light irradiation range. Therefore, in other words, the central axis LA1 and the optical axis MA1 are separated by a predetermined length La, and the central axis LA2 and the optical axis MA1 are separated by a predetermined length Lb.
- the first endoscope la has a light guide bundle 5 OA that is converged into a bundle through the insertion portion 3 and the universal cord 3a from the respective lens surfaces on the base end side of these illumination lenses 53a.
- the light guide bundle 50A passing through to the connector section 4 is connected to the light source device 5 by the connector section 4 described above.
- the two end face forces of the light guide bundle 50A are also illuminated with the illumination light supplied from the light source device 5, and the two illumination lights having the central axes LAI and LA2 passing through the two illumination lenses 53a respectively are provided in the two illumination windows. Irradiated from 50a, 50b.
- the illumination windows 50b and 55b of the distal end portion 10 of the second endoscope lb each have an illumination lens 53b. From the base end of each illumination lens 53b, a light guide bundle 50A connected to the light source device 5 is inserted into the endoscope 1.
- the illumination windows 50b and 55b and the illumination lens 53a constitute an illumination optical system, and allow illumination light from a light guide bundle 50A as an illumination member to pass therethrough.
- the center axis LA3 (the center axis of the irradiation range of the illumination light) of the illumination window 55a on the distal end face 10a of the second endoscope lb is a predetermined length Ld from the optical axis MA2 of the second observation window 15b.
- the illumination window 55b is provided at a position where its central axis LA4 is separated from the optical axis MA2 of the second observation window 15b by a predetermined length Le.
- the central axis of the second observation window 15b is coaxial with the optical axis MA2 of the second observation optical system 21b, and the central axis of the illumination window 50b is coaxial with the central axis LA3 of the illumination light.
- the central axis of the illumination window 55b is coaxial with the central axis LA4 of the illumination light.
- the central axis LA3 and the optical axis MA2 are separated by a predetermined length Ld
- the central axis LA4 and the optical axis MA2 are separated by a predetermined length Le.
- At least one of the lengths Ld and Le of the illumination windows 50b and 55b of the second endoscope lb separated from the second observation window 15b is determined by the first endoscope.
- the illumination windows 50a and 55a of the mirror la are longer than the longest distances of the lengths La and Lb separated from the first observation window 15a, respectively.
- one of the lengths Ld and Le of the second endoscope 1 b is equal to the length of the first endoscope la.
- the lengths La and Lb of the first endoscope la are different lengths (LabLb)
- either the length Ld or Le of the second endoscope lb is equal to the length of the first endoscope la.
- the length of la is longer than the longest distance of La and Lb (La ⁇ Ld, Lb-Ld or La-Le, Lb-Le).
- the illumination light supplied from the light source device 5 is emitted from the two tip surfaces of the light guide bundle 50A, and the central axes passing through the two illumination lenses 53b, respectively.
- Two illumination lights having LA1 and LA2 are emitted from the two illumination windows 50b and 55b.
- the illumination lenses 53a and 53b and the light guide bundle 50A of the first endoscope la and the second endoscope lb in FIGS. 7 to 9 described later have the same configuration. That is, the light flux of the illumination light emitted from the two illumination lenses 53a of the first endoscope la and the light flux of the illumination light emitted from the two illumination lenses 53b of the second endoscope lb are the same.
- the light source device 5 detects the brightness of the observation image displayed on the monitor screen 7a and adjusts the light so as to automatically increase or decrease the amount of predetermined illumination light. It has a light amount control means (not shown) for controlling.
- an imaging plane in the plane P1 at a position of an arbitrary imaging distance L1 of the first endoscope la and the second endoscope 1b of the endoscope system 100 of the present embodiment will be described. I do. Note that the arbitrary imaging distance L1 is set between the first observation window 15a of the first endoscope la and the second endoscope lb. An arbitrary imaging distance from a window surface on each observation side of the second observation window 15b to a plane P1 orthogonal to the respective optical axes MA1 and MA2.
- the first endoscope la shown in FIG. 5 captures an image of the plane P1
- the first imaging range A which is the viewing range within the viewing angle oc1 of the mirror la, is displayed on the monitor screen 7a.
- the first imaging range A of the plane P1 at this arbitrary imaging distance L1 is a predetermined imaging range A from two illumination windows 50a and 55a indicated by radiation dashed lines LX1 and LX2 in FIG. It is included in the range of illumination by the illumination light having the illuminance equal to or higher than.
- the radiation dashed line LX1 represents a predetermined illuminance boundary of the illumination light emitted from the illumination window 50a
- the radiation dashed line LX2 represents a predetermined illuminance boundary of the illumination light emitted from the illumination window 55a. I have.
- the radiation dashed line LX1 is referred to as a first boundary LX1
- the radiation dashed line LX2 is referred to as a second boundary LX2.
- the imaging range B of the plane P1 at this arbitrary imaging distance L1 is equal to or greater than the predetermined illuminance from the two illumination windows 50b and 55b indicated by the dashed radiation lines LX3 and LX4 in FIG. It is substantially included in the irradiation range by light.
- the radiation dashed line LX3 indicates the boundary of the predetermined illuminance of the illumination light emitted from the illumination window 50b
- the radiation dashed line LX4 indicates the boundary of the predetermined illuminance of the illumination light emitted from the illumination window 55b.
- the radiation break LX3 is referred to as a third boundary LX3
- the radiation break LX4 is referred to as a fourth boundary LX4.
- FIG. 7 is a diagram for explaining a state where the first imaging range A in which the plane P1 is imaged at an arbitrary imaging distance L1 by the first endoscope la is displayed on the monitor screen 7a.
- FIGS. 8 and 9 are diagrams for explaining a state in which a second imaging range B obtained by imaging the plane P1 at an arbitrary imaging distance L1 by the second endoscope lb is displayed on the monitor screen 7a. It is.
- a first imaging range A displayed on the monitor screen 7a is surrounded by an illumination range of illumination light having a predetermined illuminance or higher and a second boundary LX2 surrounded by a first boundary LX1. It is encompassed by the illumination range of the illumination light that exceeds the specified illuminance. More specifically, the illumination range II having a point Ml passing through the central axis LA1, which is a light distribution range of illumination light having a predetermined illuminance or more from the illumination window 50a on the plane P1, and the illumination light from the illumination window 55a.
- the first illumination range la which is a light distribution range of illumination light having a predetermined illuminance or more and has a point M2 through which the central axis LA1 passes and formed by The imaging range A is included.
- the irradiation range II and the irradiation range 12 partially overlap. That is, in the first imaging range A of the first endoscope la at an arbitrary imaging distance L1, the entire range is irradiated with illumination light having a predetermined illuminance or higher, and the entire image on the monitor screen 7a is converted to the predetermined image. Displays brightness higher than the illuminance.
- the symbol Ma in FIG. 7 indicates a point Ma at which the optical axis MA1 of the first endoscope la passes through the first imaging range A. That is, since each of the optical axis MA1 and the two central axes LAI and LA2 is a parallel axis, the first imaging range within the plane P1 at the imaging distance L1 of the first endoscope 1a.
- the distance from the point Ma on A to the point Ml is the length La
- the distance to Ml is the length Lb.
- the second endoscope lb has a second viewing optical system 21b having a viewing angle ⁇ 2, which is wider than the viewing angle ⁇ 1 of the first endoscope la,
- a second imaging range B wider than the first imaging range A of the first endoscope la can be displayed on the monitor screen 7a.
- two central axes LAI and LA2 are separated from the optical axis MA1 of the first endoscope la by the same distance as the lengths La and Lb, respectively.
- a first irradiation range la that is the same as the first irradiation range la of the first endoscope la is formed on the plane P1. Therefore, since the second endoscope lb can image the second imaging range B wider than the first imaging range A of the first endoscope la, the illumination light of the second endoscope lb can be obtained.
- the ratio that includes the second imaging range B with the second illumination range lb equal to or greater than the predetermined illuminance is the first ratio with the first illumination range la equal to or greater than the predetermined illuminance of the illumination light of the first endoscope la. Is smaller than the ratio including the imaging range A.
- the second endoscope lb cannot irradiate the periphery of the second imaging range B for imaging with illumination light having a predetermined illuminance or more. Therefore, the monitor screen 7a displayed by the second endoscope lb is displayed darker at the periphery than the monitor screen 7a displayed by the first endoscope.
- the second imaging range B displayed on the monitor screen 7a becomes the third imaging range B.
- the first and second illumination lines so that they can be substantially encompassed by the irradiation range of the illumination light having the predetermined illuminance or higher surrounded by the boundary line LX3 and the irradiation range of the illumination light having the predetermined illumination level or higher surrounded by the fourth boundary line LX4.
- One of the distances from the optical axis MA2 of the second endoscope 1b to the central axes LA3 and LA4 is longer than the longest of the distances from the optical axis MA1 of the endoscope la to the central axes LAI and LX2. I do. More specifically, an illumination range 13 having a point M3 passing through the central axis LA3, which is a light distribution range of illumination light having a predetermined illuminance or more from the illumination window 50b on the plane P1, and an illumination light from the illumination window 55b.
- the second imaging range B is substantially included.
- the irradiation range 13 and the irradiation range 14 partially overlap. That is, the second endoscope lb is illuminated such that illumination light having a predetermined illuminance or more is radiated to the periphery of the second imaging range B of the second endoscope lb at an arbitrary imaging distance L1.
- the distance from the axis MA2 to the central axes LA3 and LA4 is determined, and the second observation window 15b and the two illumination windows 50b and 55b disposed on the distal end face 10a are positioned.
- the second endoscope lb is displayed on the monitor screen 7a so that a predetermined brightness encompasses the peripheral portion, which is substantially the same as the monitor screen 7a displayed by the first endoscope. Can be.
- the symbol Mb in FIG. 9 indicates a point Mb at which the optical axis MA2 of the second endoscope lb passes through the second imaging range B. That is, since the optical axis MA2 and the two central axes LA3 and LA4 are parallel axes, the second imaging range within the plane P1 at an arbitrary imaging distance L1 of the second endoscope lb.
- the distance from the point Mb on B to the point M3 is the length Ld
- the distance from to the point M4 is the length Le.
- the second irradiation range lb on the plane P 1 of the arbitrary imaging distance L 1 of the second endoscope lb is equal to the plane P 1 of the arbitrary imaging distance L 1 of the first endoscope la.
- the range is wider than the first irradiation range la above. That is, the second endoscope lb can irradiate illumination light having a predetermined illuminance or higher on the plane P1 at an arbitrary imaging distance L1 over a wider range than the first endoscope la.
- illumination light having a predetermined illuminance or more is provided around a second imaging range B of the second endoscope lb. Is irradiated, the first imaging range A projected on the monitor screen 7a by the first endoscope la and the second imaging range B projected on the monitor screen 7a by the second endoscope lb are substantially the same. The images have the same brightness.
- FIG. 10 is a diagram for explaining a state where the second imaging range B at an arbitrary imaging distance L1 is displayed on the monitor screen 7a by the second endoscope lb.
- the configuration, operation, and effect of the second endoscope lb and the monitor screen 7a in FIG. 11 are the same as those of the above-described second endoscope lb and the monitor screen 7a, and thus description thereof will be omitted. .
- a radiation broken line LX5 in Fig. 10 represents a boundary line of a predetermined illuminance of the illumination light emitted from the illumination window 55c.
- the radiation dashed line LX5 is referred to as a second boundary LX5.
- a second irradiation range Ic in which the body has a predetermined illuminance or more is formed.
- the plane of the second imaging range B is substantially included in the plane of the third irradiation range Ic. That is, the second endoscope lb is illuminated such that illumination light having a predetermined illuminance or more is radiated to the periphery of the second imaging range B of the second endoscope lb at an arbitrary imaging distance L1.
- the distance from the axis MA2 to the central axes LA3, LA4, LA5 is determined, and the second observation window 15b and the three illumination windows 50b, 55b, 56b disposed on the distal end face 10a are positioned!
- the third irradiation range Ic on the plane P1 of the arbitrary imaging distance L1 of the second endoscope lb is the plane P1 of the arbitrary imaging distance L1 of the first endoscope la.
- the range is wider than the first irradiation range la above. That is, the second endoscope lb can irradiate the illumination light having the predetermined illuminance or more on the plane P1 with the arbitrary imaging distance L1 over a wider range than the first endoscope la.
- FIG. 11 is a cross-sectional view in which the distal end portion 10 of the second endoscope lb is cut in the longitudinal direction so as to pass through the centers of the respective windows of the illumination windows 50b and 55b and the second observation window 15b.
- FIG. 12 is a diagram for explaining a state in which a second imaging range B in which the plane P1 is imaged at an arbitrary imaging distance L1 by the second endoscope lb is displayed on the monitor screen 7a.
- the second endoscope lb is provided at the two illumination windows 50b and 55b, where the optical axis is provided so as to be directed in the peripheral direction of the second imaging range B. It has two illumination lenses 53b.
- the second endoscope lb includes a central axis LA3 that is inclined at a predetermined inclination angle ⁇ 1 with respect to the optical axis MA2 of the second observation optical system 21b, and a second observation optical system 21b. It has a central axis LA4 inclined at a predetermined inclination angle ⁇ 2 with respect to the optical axis MA2.
- the illumination window 50b through which the central axis LA3 passes has a window surface of an inclination angle ⁇ 1 with respect to the window surface of the second observation window 15b through which the optical axis MA2 passes
- the illumination window through which the central axis LA4 passes 55b has a window surface having an inclination angle of ⁇ 2 with the window surface of the second observation window 15b through which the optical axis MA2 passes.
- a plane P 1 at an arbitrary imaging distance L 1 is set to the second endoscope 1.
- a description will be given of a second imaging range B, which is included in illumination light having a predetermined illuminance or more when captured by b, that is, a range displayed on the monitor screen 7a.
- the second imaging range B displayed on the monitor screen 7a becomes the third boundary. This is substantially encompassed by the irradiation range of the predetermined illuminance or higher surrounded by the line LX3 and the irradiation range of the illumination light of the predetermined illuminance or higher surrounded by the fourth boundary LX4.
- the first endoscope la is an axis in which the optical axis MA1 and the two central axes LAI and LA2 are parallel to each other, so that each of the first endoscope la from the point Ma to the points Ml and M2 of the first imaging range A is provided.
- the length is the same as the length La, Lb of the distance from the optical axis MAI to the central axis LAI, LA2. Therefore, the second imaging range B of the second endoscope lb is longer than the longest of the two lengths La and Lb from the optical axis MA1 of the first endoscope la to the central axis LAI and LX2. If any one of the lengths Ldl and Ld2 is increased from the upper point Mb to the points M3 and M4, the area of the second irradiation range Id consisting of the irradiation range 13 and the irradiation range 14 of the second endoscope lb is changed to the first area. Can be larger than the area of the first irradiation range la of the endoscope.
- Second endoscope lb Length Ld or Le is longer than the longest of the lengths La and Lb of the first endoscope la (La ⁇ Ld, Lb * Ld or La * Le, Lb * Le ) Relationship.
- the second irradiation range Id on the plane PI of the imaging distance L1 of the second endoscope lb is the first irradiation range on the plane P1 of any imaging distance L1 of the first endoscope la.
- the range is wider than la. That is, the second endoscope lb can irradiate the illumination light having the predetermined illuminance or more on the plane P1 at an arbitrary imaging distance L1 wider than the first endoscope la. That is, the second endoscope lb can be displayed on the monitor screen 7a such that the same predetermined brightness as the monitor screen 7a displayed by the first endoscope substantially encompasses the peripheral portion.
- the endoscope system 100 according to the present embodiment can obtain the same effect as the endoscope system 100 according to the first embodiment.
- the second endoscope lb emits illumination light at an irradiation angle wider than the illumination angle of the illumination light of the first endoscope la. Irradiation may be used.
- the second endoscope lb is provided with at least one illumination capable of irradiating the illumination light with the predetermined illuminance or more to the irradiation range wider than the illumination light with the predetermined illuminance of the first endoscope la. It has an optical system.
- a diode as a light emitting element may be used at the end of the endoscope la, lb, with the central axis of the illumination range at an arbitrary imaging distance L1 for illumination light having a predetermined illuminance or higher. ,.
- the endoscope system according to the present invention is particularly useful for an endoscope system including two endoscopes having different viewing angles.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05737166.8A EP1743567B1 (en) | 2004-04-27 | 2005-04-26 | Endoscope and endoscope system |
US11/553,121 US8002697B2 (en) | 2004-04-27 | 2006-10-26 | Dual endoscope system with display unit |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004132072A JP4554267B2 (ja) | 2004-04-27 | 2004-04-27 | 内視鏡及び内視鏡システム |
JP2004-132072 | 2004-04-27 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/553,121 Continuation US8002697B2 (en) | 2004-04-27 | 2006-10-26 | Dual endoscope system with display unit |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005102146A1 true WO2005102146A1 (ja) | 2005-11-03 |
Family
ID=35196682
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/007924 WO2005102146A1 (ja) | 2004-04-27 | 2005-04-26 | 内視鏡及び内視鏡システム |
Country Status (6)
Country | Link |
---|---|
US (1) | US8002697B2 (ja) |
EP (1) | EP1743567B1 (ja) |
JP (1) | JP4554267B2 (ja) |
KR (1) | KR100847406B1 (ja) |
CN (1) | CN1946334A (ja) |
WO (1) | WO2005102146A1 (ja) |
Families Citing this family (15)
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JP2006034543A (ja) * | 2004-07-26 | 2006-02-09 | Olympus Corp | 内視鏡、及びその修理方法 |
JP2010519974A (ja) | 2007-03-01 | 2010-06-10 | カンポス,ジヨージ・エイ | 内視鏡用の先端面組立体 |
JP2009061097A (ja) * | 2007-09-06 | 2009-03-26 | Olympus Medical Systems Corp | カプセル内視鏡 |
EP2105779A3 (en) * | 2008-03-21 | 2009-11-18 | FUJIFILM Corporation | Illumination optical system for endoscope and assembly method thereof |
US8636653B2 (en) * | 2008-06-09 | 2014-01-28 | Capso Vision, Inc. | In vivo camera with multiple sources to illuminate tissue at different distances |
DE102009013312A1 (de) * | 2009-03-18 | 2010-09-23 | Richard Wolf Gmbh | Uretero-Renoskop |
EP2415386B1 (en) * | 2009-03-31 | 2018-11-14 | Olympus Corporation | Endoscope with improved light distribution of illumination |
JP2011147757A (ja) * | 2009-09-29 | 2011-08-04 | Fujifilm Corp | 医療機器及び内視鏡装置 |
CN102469930B (zh) * | 2009-11-06 | 2014-09-10 | 奥林巴斯医疗株式会社 | 内窥镜系统 |
TWI539925B (zh) * | 2011-01-18 | 2016-07-01 | Medical Intubation Tech Corp | An endoscopic image pickup assembly having two or more illumination directions |
JP5677378B2 (ja) * | 2012-07-25 | 2015-02-25 | 富士フイルム株式会社 | 内視鏡システム |
JP6238690B2 (ja) * | 2013-11-13 | 2017-11-29 | オリンパス株式会社 | 内視鏡システム |
WO2015170525A1 (ja) * | 2014-05-07 | 2015-11-12 | オリンパス株式会社 | 内視鏡 |
WO2016027634A1 (ja) * | 2014-08-22 | 2016-02-25 | オリンパス株式会社 | 内視鏡装置 |
JP2018148943A (ja) * | 2017-03-09 | 2018-09-27 | ソニー・オリンパスメディカルソリューションズ株式会社 | 医療用内視鏡システム |
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JPS5489749A (en) * | 1977-12-27 | 1979-07-17 | Fuji Photo Optical Co Ltd | Lighting optical system of endoscope |
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2005
- 2005-04-26 EP EP05737166.8A patent/EP1743567B1/en not_active Expired - Fee Related
- 2005-04-26 WO PCT/JP2005/007924 patent/WO2005102146A1/ja active Application Filing
- 2005-04-26 KR KR1020067022245A patent/KR100847406B1/ko not_active IP Right Cessation
- 2005-04-26 CN CNA2005800132601A patent/CN1946334A/zh active Pending
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- 2006-10-26 US US11/553,121 patent/US8002697B2/en active Active
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JPS5675909U (ja) * | 1979-11-15 | 1981-06-20 | ||
JPH07140329A (ja) * | 1993-11-12 | 1995-06-02 | Fujikura Ltd | 広角照明装置 |
JPH0998943A (ja) * | 1995-10-04 | 1997-04-15 | Olympus Optical Co Ltd | 電子内視鏡 |
JP2000037345A (ja) * | 1998-05-18 | 2000-02-08 | Fuji Photo Optical Co Ltd | 内視鏡の観察装置 |
JP2003275165A (ja) * | 2002-03-26 | 2003-09-30 | Pentax Corp | 内視鏡配光レンズ及びその成形金型の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1743567A1 (en) | 2007-01-17 |
JP2005312553A (ja) | 2005-11-10 |
EP1743567A4 (en) | 2009-07-22 |
US20070055106A1 (en) | 2007-03-08 |
KR100847406B1 (ko) | 2008-07-18 |
JP4554267B2 (ja) | 2010-09-29 |
CN1946334A (zh) | 2007-04-11 |
US8002697B2 (en) | 2011-08-23 |
EP1743567B1 (en) | 2015-05-27 |
KR20070004898A (ko) | 2007-01-09 |
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