Endoscope and video laser camera system therefor

• US 5,172,685 A
• Filed: 02/12/1992
• Issued: 12/22/1992
• Est. Priority Date: 05/27/1988
• Status: Expired due to Fees

• Current Assignee: University of Connecticut (State of Connecticut)
• Original Assignee: University of Connecticut (State of Connecticut)
• Inventors: Nudelman, Sol
• Primary Examiner(s): HINDENBURG, MAX F
• Application Number:
  US07/835,021
• Time in Patent Office: 314 Days
• Field of Search: 128/6, 128/395-398, 606/14, 606/16
• US Class Current: 600/108
• CPC Class Codes: A61B 1/00193 adapted for stereoscopic vision
• CPC Class Codes: A61B 1/042 characterised by a proximal camera, e.g. a CCD camera
• CPC Class Codes: A61B 18/24 with a catheter A61B18/26, A61B18/28 take precedence
• CPC Class Codes: A61B 2018/20351 Scanning mechanisms
• CPC Class Codes: A61B 2018/20355 Special scanning path or conditions, e.g. spiral, raster or providing spot overlap
• CPC Class Codes: A61B 2018/2211 Plurality of fibres
• CPC Class Codes: G02B 23/2469 using optical fibres
• CPC Class Codes: G02B 23/26 using light guides for illumination G02B23/2469
• CPC Class Codes: G02B 6/4296 coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
• CPC Class Codes: H01L 31/02024 Position sensitive and lateral effect photodetectors; Quadrant photodiodes

Abstract

An endoscope is adapted for operation in association with an optical scanner which generates a beam of radiation tracing out a raster. The endoscope employs at least one optical channel comprising a bundle of coherent flexible optical fibers. Elemental photodetectors which may be mounted at either the distal end of the endoscope probe or the proximal end of the endoscope probe are employed for sensing reflected radiation and generating a video signal. The optical channel may also be employed for transmission of a high-energy therapy beam. The endoscope is capable of obtaining multispectral-multidimensional (e.g. stereo) images of the tissue under examination.

Claims

1. An endoscope adapted for operation in association with an optical scanner which generates a beam of radiation tracing out a raster comprising:

optical channel means comprising a bundle of coherent flexible optical fibers for forming an optical channel having a proximal end and a distal end;

photosensor means comprising an elemental photodetector for generating an electrical signal having an instantaneous value proportional to the quantity of light impinging on said photodetector;

beam splitter means positioned in an optical path partially defined by said proximal end for directing radiation exiting said optical channel through said proximal end to said photosensor means; and

imaging means responsive to said photosensor means for forming an image of an object,

so that a raster from said scanner projected on said proximal end traverses said beam splitter means and said optical channel and is projected through said distal end for illuminating the surface of an object to be examined and radiation reflected from said surface traverses said optical channel and is directed by said beam splitter means to said photosensor means.

2. The endoscope of claim 1 and further comprising therapy beam means for projecting a second beam of radiation on said proximal end for traversal through said optical channel for irradiating selective portions of the surface of the object.

3. The endoscope of claim 1 wherein the photodetector is selectively responsive to a pre-established narrow band of the electromagnetic spectrum.