STEREOSCOPIC ILLUMINATION ENDOSCOPE SYSTEM

• US 20070019916A1
• Filed: 07/18/2006
• Published: 01/25/2007
• Est. Priority Date: 07/20/2005
• Status: Abandoned Application

• Current Assignee: Pentax Corporation (Hoya Corporation)
• Original Assignee: Pentax Corporation (Hoya Corporation)
• Inventors: TAKAMI, Satoshi
• Application Number:
  US11/458,232
• Publication Number:
  US 20070019916A1
• Time in Patent Office: Days
• US Class Current: 385/117
• CPC Class Codes: A61B 1/00167 Details of optical fibre bundles, e.g. shape or fibre distribution
• CPC Class Codes: A61B 1/00193 adapted for stereoscopic vision
• CPC Class Codes: A61B 1/0646 with illumination filters
• CPC Class Codes: A61B 1/0669 at proximal end of an endoscope
• CPC Class Codes: A61B 1/07 using light-conductive means, e.g. optical fibres
• CPC Class Codes: G02B 23/2469 using optical fibres
• CPC Class Codes: G02B 5/205 Neutral density filters
• CPC Class Codes: G02B 6/04 formed by bundles of fibres G02B6/24 takes precedence
• CPC Class Codes: G02B 6/4298 coupling with non-coherent light sources and/or radiation detectors, e.g. lamps, incandescent bulbs, scintillation chambers

Abstract

A stereoscopic illumination endoscope system includes an endoscope processor; an electronic scope detachably attached to the endoscope processor, the electronic scope having a light guide provided therein, wherein the light guide includes a plurality of optical fiber bundles having incident-end faces arranged adjacent to each other and emission-end faces being arranged away from each other in a lateral direction thereof at the distal end; and an incident light controller which adjusts a quantity and quantity ratio of the illumination light emitted from the light source and incident on the respective incident-end faces, the incident light controller provided between the light source and the incident-end faces.

Claims

1. A stereoscopic illumination endoscope system comprising:

an endoscope processor including a light source;

an electronic scope detachably attached to said endoscope processor, said electronic scope having a light guide provided therein, wherein illumination light emitted from said light source is projected onto an object to be observed from a distal end of said electronic scope via said light guide, and wherein said light guide includes a plurality of optical fiber bundles having respective incident-end faces for the illumination light to be incident on and respective emission-end faces for the incident illumination light to be emitted from, said incident-end faces being arranged adjacent to each other, and said emission-end faces being arranged away from each other in a lateral direction thereof; and

an incident light controller which adjusts a quantity and quantity ratio of said illumination light emitted from said light source and incident on said respective incident-end faces, said incident light controller provided between said light source and said incident-end faces.

2. The stereoscopic illumination endoscope system according to claim 1, wherein said light guide comprises a pair of said optical fiber bundles;

and

wherein said incident-end faces of said pair of optical fiber bundles are formed as substantially semicircular shapes so as to form a substantially circular shape as a whole.

3. The stereoscopic illumination endoscope system according to claim 2, wherein said substantially semicircular incident-end faces are arranged in a vertical direction when said electronic scope is detachably attached to said endoscope processor.

4. The stereoscopic illumination endoscope system according to claim 2, wherein an image pickup device is provided between said emission-end faces of said pair of optical fiber bundles at the distal end of said body insertion part of said electronic scope.

5. The stereoscopic illumination endoscope system according to claim 4, wherein said incident light controller comprises a light quantity control plate which is supported so as to be movable in said vertical direction, said control plate being formed so as to have a light transmittance which varies one of gradually and stepwise along said vertical direction.

6. The stereoscopic illumination endoscope system according to claim 5, wherein said illumination light emitted from said light source comprises a parallel light bundle;

and

wherein said light quantity control plate has a lower transmittance in an area where an upper part of said illumination light passes.

7. The stereoscopic illumination endoscope system according to claim 2, wherein said incident light controller comprises a shield plate provided in an optical path between said light source and said incident-end faces of said pair of optical fiber bundles, said shield plate having upper and lower apertures, wherein said shield plate is moved up and down to adjust respective light quantities of said illumination light which pass through said upper and lower apertures of said shield plate.

8. The stereoscopic illumination endoscope system according to claim 2, wherein said incident light controller comprises a shield plate provided in an optical path between said light source and said incident-end faces of said pair of optical fiber bundles,

wherein said shield plate divides said illumination light into a plurality of light bundles to be incident on said incident-end faces, respectively, and said shield plate is moved up and down to adjust respective light quantity of said light bundles.

9. The stereoscopic illumination endoscope system according to claim 1, wherein said light guide comprises a pair of said optical fiber bundles;

and

wherein said incident-end faces of said pair of optical fiber bundles are formed as split halves of a polygon so as to form said polygon as a whole when arranged in close contact with each other.

10. The stereoscopic illumination endoscope system according to claim 9, wherein said split halves of said polygon incident-end faces are arranged in a vertical direction when said electronic scope is detachably attached to said endoscope processor.

11. The stereoscopic illumination endoscope system according to claim 9, wherein an image pickup device is provided between said emission-end faces of said pair of optical fiber bundles at the distal end of said body insertion part of said electronic scope.

12. The stereoscopic illumination endoscope system according to claim 9, wherein said incident light controller comprises a light quantity control plate which is supported so as to be movable in said vertical direction, said control plate being formed so as to have a light transmittance which varies one of gradually and stepwise along said vertical direction.

13. The stereoscopic illumination endoscope system according to claim 12, wherein said illumination light emitted from said light source comprises a parallel light bundle;

and

wherein said light quantity control plate has a lower transmittance in an area where an upper part of said illumination light passes.

14. The stereoscopic illumination endoscope system according to claim 9, wherein said incident light controller comprises a shield plate provided in an optical path between said light source and said incident-end faces of said pair of optical fiber bundles, said shield plate having upper and lower apertures.

15. The stereoscopic illumination endoscope system according to claim 9, wherein said light shield comprises a shield plate provided in an optical path between said light source and said incident-end faces of said pair of optical fiber bundles, said shield plate being moved up and down to adjust respective light quantities of said illumination light which pass through said upper and lower apertures of said shield plate.

16. The stereoscopic illumination endoscope system according to claim 5, wherein said light source comprises a lamp for emitting a parallel light bundle, and a condenser lens for focusing said parallel light bundle emitted from said lamp;

and

wherein said light quantity control plate is provided between said lamp and said condenser lens.

17. The stereoscopic illumination endoscope system according to claim 7, wherein said light source comprises a lamp for emitting a parallel light bundle, and a condenser lens for focusing said parallel light bundle emitted from said lamp;

wherein said shield plate is provided between said condenser lens and said incident-end faces of said optical fiber bundles.

18. An electronic scope detachably attached to the endoscope processor comprising:

a light guide provided therein, wherein illumination light emitted from a light source is projected onto an object to be observed from a distal end of said electronic scope via said light guide, and

wherein said light guide includes a plurality of optical fiber bundles having respective incident-end faces for the illumination light to be incident on and respective emission-end faces for the incident illumination light to be emitted from, said incident-end faces being arranged adjacent to each other, and said emission-end faces being arranged away from each other.

19. An endoscope processor detachably attached to an electronic scope comprising:

a light source which emits illumination light so as to be incident on an incident end face of a light guide provided in said electronic scope and to emit from a distal end of said light guide;

wherein said light guide includes a plurality of optical fiber bundles having respective incident-end faces for said illumination light to be incident on and respective emission-end faces for said incident illumination light to be emitted from, said incident-end faces being arranged adjacent to each other, and said emission-end faces being arranged away from each other in a lateral direction thereof; and

wherein an incident light controller is provided between said light source and said incident-end faces, wherein said incident light controller adjusts a quantity and quantity ratio of said illumination light emitted from said light source and incident on said respective incident-end faces.