Color endoscope

• US 4,261,344 A
• Filed: 09/24/1979
• Issued: 04/14/1981
• Est. Priority Date: 09/24/1979
• Status: Expired

• Current Assignee: Welch Allyn Incorporated
• Original Assignee: Welch Allyn Incorporated
• Inventors: Newman, Richard W., Danna, Dominick, Moore, William C.
• Primary Examiner(s): Yasko, John D.
• Application Number:
  US06/078,300
• Time in Patent Office: 568 Days
• Field of Search: 128/4, 128/6-11, 350/96.26, 358/98, 358/1
• US Class Current: 600/109
• CPC Class Codes: A61B 1/05 characterised by the image sensor, e.g. camera, being in the distal end portion
• CPC Class Codes: H04N 23/555 for picking-up images in sites, inaccessible due to their dimensions or hazardous conditions, e.g. endoscopes or borescopes
• CPC Class Codes: H04N 23/56 provided with illuminating means
• CPC Class Codes: H04N 23/84 for processing colour signals

Abstract

A color endoscope having a compact viewing head that is easily inserted into a relatively small opening or cavity and an electrical section that is capable of producing a readout signal containing full color image information that is compatible with standard format television for storing, displaying or otherwise processing the color information.

Claims

1. In an endoscope of the type having a relatively small viewing head containing a single solid state imaging device for recording light images formed in the viewing region of the head and providing an electrical read-out signal containing the image information, the method of generating a full color standard format video signal including the steps of

providing an individual light source for each of the primary colors utilized in the video system at a location that is remote from the viewing head,

turning each of the light sources on and off in an ordered sequence,

transmitting the light emitted by each source into the viewing region of the head by means of a randomly dispersed bundle of optical fibers whereby image shadowing in the viewing region is minimized,

sequentially recording each of the color images on the single solid state imaging device,

electrically coupling the read-out signals of the imaging device to a memory,

storing the individual color read-out signals in the memory, and

periodically forwarding the color signals stored in the memory simultaneously to a processor for combining the color signals into composite signals that are compatible with a standard format color receiver.

2. The method of claim 1 that further includes the step of periodically upgrading the color signal information stored in the memory.

3. The method of claim 1 wherein the light sources emit light of the three primary colors of red, blue and green.

4. The method of claim 3 wherein each primary color signal stored in the memory is updated during each video frame.

5. The method of claim 3 wherein one primary color signal stored in the memory is updated during each video frame.

6. The method of claim 1 that further includes the step of applying the output of the video processor to a standard format television receiver.

7. The method of claim 6 that further includes the step of applying the output of the video processor to a standard format video recorder.