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OPTICAL VIEWING INSTRUMENT

  • US 3,556,085 A
  • Filed: 02/26/1968
  • Issued: 01/19/1971
  • Est. Priority Date: 02/26/1968
  • Status: Expired due to Term
First Claim
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1. A microscope adapted to be inserted into a living body for direct examination of interior surfaces thereof and having a magnifying objective lens system, a fiber optical viewing system for transmitting therethrough the image of the object focused on the forward end surface thereof by said magnifying objective lens system to the rear end surface of said fiber optical viewing system, eyepiece means for observing the magnified image formed on said rear end surface of said fiber optical viewing system, a fiber optical illuminating system for illuminating the object by the light transmitted from a light source through said fiber optical illuminating system to the front end surface thereof and onto said object, and open ended tube means covering the systems watertightly for protection against liquids encountered when the microscope is inserted in the living body, the improvement wherein optical means is provided in front of said magnifying objective lens system at the open end of said tube means in optical alignment therewith at an appropriate distance therefrom, the open end of said tube means and the forward end surface of said optical means being inclined in a common plane with respect to the plane normal to the optical axis of said objective lens system so that the inclined forward end surface of said optical means and the open end of the tube means flush therewith constitutes a needle which can easily penetrate a part of the body to be examined, said penetration being controlled by manipulating said microscope thereby permitting direct examination of the interior of the body without need for excising a specimen for examination.

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