WO1993009707A1 - Systeme video pour l'endoscopie - Google Patents

Systeme video pour l'endoscopie Download PDF

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Publication number
WO1993009707A1
WO1993009707A1 PCT/DE1992/000966 DE9200966W WO9309707A1 WO 1993009707 A1 WO1993009707 A1 WO 1993009707A1 DE 9200966 W DE9200966 W DE 9200966W WO 9309707 A1 WO9309707 A1 WO 9309707A1
Authority
WO
WIPO (PCT)
Prior art keywords
control unit
video
image
video system
brightness value
Prior art date
Application number
PCT/DE1992/000966
Other languages
German (de)
English (en)
Inventor
Norbert Lemke
Original Assignee
Lemke Gmbh
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 Lemke Gmbh filed Critical Lemke Gmbh
Publication of WO1993009707A1 publication Critical patent/WO1993009707A1/fr

Links

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
    • A61B1/04—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
    • A61B1/0655—Control therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/555—Constructional details for picking-up images in sites, inaccessible due to their dimensions or hazardous conditions, e.g. endoscopes or borescopes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80—Camera processing pipelines; Components thereof
    • H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
    • H04N23/88—Camera processing pipelines; Components thereof for processing colour signals for colour balance, e.g. white-balance circuits or colour temperature control

Definitions

  • the invention relates to a video system for endoscopy according to the preamble of patent claim 1.
  • Video systems for endoscopy have become increasingly widespread for some time, since they do not allow the endoscopically recorded image to be viewed as a comparatively small ocular image, but rather as a large image on a monitor.
  • the known video systems for endoscopy have a video recorder which is arranged either at the proximal end or at the distal end of an endoscope.
  • the endoscope In the case of the distal arrangement, the endoscope has no optical image transmission or image guide system, since the image is “electronically transmitted”.
  • the endoscope In the case of the proximal arrangement of the video recorder, the endoscope is constructed in a manner known per se and in particular has a lens and an optical image guide system, which in the case of a rigid endoscope, for example, a rod lens system and in the case of a flexible endoscope can be a fiber optic bundle.
  • the image of the distal objective of the endoscope generated by the image guide system and possibly an eyepiece is then recorded by the proximally arranged video sensor.
  • an illuminating light guide is provided, into which the light of an illuminating unit for illuminating the recorded image can be coupled.
  • control unit is usually provided, to which the output signal of the image sensor is present and which generates a video image which is displayed on the monitor.
  • the video amplifier is arranged in the control unit away from the video recorder for reasons of space.
  • the control unit also controls the luminous flux coupled into the illuminating light guide on the basis of the output signal from the image recorder or the video amplifier.
  • This neutral white surface can be, for example, a white, diffusely scattering lens cover or a white sheet of paper.
  • the aperture of the lens is usually automatically opened or closed to such an extent that the imaged white area corresponds to an ideal signal value for electronic adjustment, since an ideal signal value is only possible with the correct signal brightness value White balance can be done.
  • video systems for endoscopy do not have a lens diaphragm, since a diaphragm would vignetting the beam path too strongly.
  • the lamp current for the lighting unit is regulated in such a way that the recorded image has the correct signal brightness value.
  • Regulated lamps with motor-driven diaphragms in the luminous flux are known, but these lamps generally result in unfavorable shading of the entry surface of the light guide during the conventional white balance.
  • the invention has for its object to develop a video system for endoscopy in such a way that a simple check of the video system and / or a simple white balance is possible.
  • control unit shows on the monitor, in addition to or instead of the video image, the brightness of the recorded video image.
  • the control unit presses an electronic display within the camera signal in such a way that a brightness value, for example a controlled pointer, is guided into a fixed marking shown on the screen (claim 4).
  • the control unit for performing the white balance by recording a white object on the monitor represents a target brightness value and an actual brightness value. This can be achieved, for example, by the fact that when the pointer already mentioned arrives in the marking the control unit carries out the automatic white balance.
  • the monitor image in such an embodiment of the invention is shown in FIG. 1, the text of which is expressly referred to as a disclosure.
  • the brightness value is generated by varying a white area in front of the endoscope or the optics, with a control voltage in the central control range of the lamp which is kept constant during the adjustment (claim 3). Since the ideal brightness value of a white surface is displayed for the electronics, and the lamp is kept in the middle of the control range until the automatic adjustment has ended, an ideal color adjustment is obtained, which can also be carried out fully automatically with sterile hands.
  • control unit only carries out the white balance if the actual brightness value is approximately the same as the target brightness value for a certain time (cf. also FIG. 1).
  • control unit for checking the video system including the respectively connected endoscope, displays on the screen what working distance an object with a certain color should have, depending on the respective endoscope and the power of the lighting unit.
  • a corresponding monitor image is shown in FIG. 2, the types of endoscopes given being of course only examples.
  • the control unit determines the brightness of the recorded "image” and compares this brightness value with a standard brightness value. According to claim 7, the measured brightness is preferably displayed as a percentage of a standard brightness value (cf. also FIG. 2).
  • a microcomputer unit which carries out a self-test and / or an automatic white balance at least after the system is switched on.
  • the video system according to the invention for endoscopy is based on the present description, for example can be implemented using a commercially available microcomputer circuit, the description of a circuit structure is omitted.
  • the video system according to the invention is suitable for distal or proximal video recorders.

Abstract

Système video pour l'endoscopie comprenant un enregistreur vidéo lui-même composé d'un objectif et d'un système de prise de vue et en particulier d'une puce CCD. Cet enregistreur vidéo peut être fixé à l'extrémité proximale d'un endoscope avec un objectif, un système de circuit vidéo et un conducteur optique d'éclairage ou bien il peut être placé à l'extrémité distale. Le système vidéo comprend une unité d'éclairage pilotable dont la lumière peut être amenée dans le conducteur optique d'éclairage de l'endoscopie, ainsi qu'une unité de commande à laquelle parvient le signal de sortie de l'enregistreur vidéo et qui génère une image vidéo sur un moniteur. Sur la base du signal de sortie de l'enregistreur vidéo, l'unité de commande régule le flux lumineux amené dans le conducteur optique d'éclairage. L'intervention présente la particularité que l'unité de commande indique sur le moniteur en plus ou à la place de l'image vidéo, la luminosité de l'image vidéo prise.
PCT/DE1992/000966 1991-11-19 1992-11-19 Systeme video pour l'endoscopie WO1993009707A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4138128A DE4138128A1 (de) 1991-11-19 1991-11-19 Videosystem fuer die endoskopie
DEP4138128.9 1991-11-19

Publications (1)

Publication Number Publication Date
WO1993009707A1 true WO1993009707A1 (fr) 1993-05-27

Family

ID=6445173

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1992/000966 WO1993009707A1 (fr) 1991-11-19 1992-11-19 Systeme video pour l'endoscopie

Country Status (2)

Country Link
DE (1) DE4138128A1 (fr)
WO (1) WO1993009707A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4316624A1 (de) * 1993-05-18 1994-12-01 Norbert Lemke Video-Endoskopieeinrichtung
KR101250611B1 (ko) * 2006-01-30 2013-04-09 뉴 웨이브 서지컬 코포레이션. 의료 처치 전에 의료용 비디오 내시경에 화이트 밸런싱을 행하고 흐림 방지제를 인가하기 위한 장치
EP2384688B1 (fr) * 2009-05-18 2012-10-31 Olympus Medical Systems Corp. Dispositif endoscopique

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3432018A1 (de) * 1983-09-05 1985-08-01 Olympus Optical Co., Ltd., Tokio/Tokyo Endoskopanordnung mit einem laenglichen einschiebeelement
US4831437A (en) * 1987-08-11 1989-05-16 Olympus Optical Co., Ltd. Video endoscope system provided with color balance adjusting means

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3432018A1 (de) * 1983-09-05 1985-08-01 Olympus Optical Co., Ltd., Tokio/Tokyo Endoskopanordnung mit einem laenglichen einschiebeelement
US4831437A (en) * 1987-08-11 1989-05-16 Olympus Optical Co., Ltd. Video endoscope system provided with color balance adjusting means

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 015, no. 403 15. Oktober 1991 *
PATENT ABSTRACTS OF JAPAN vol. 5, no. 179 (E-82)(851) 17. November 1981 *
PATENT ABSTRACTS OF JAPAN vol. 8, no. 81 (E-238)(1518) 13. April 1984 *

Also Published As

Publication number Publication date
DE4138128A1 (de) 1993-05-27

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