Endoscope having transparent resin sealing layer
First Claim
1. An endoscope comprising:
- a small-diameter insertion section able to enter a body cavity, the insertion section having a hollow cylindrical member one end of which has an opening to the outside, said cylindrical member containing a light guide fiber bundle for emitting a beam of illumination light into the body cavity, an object optical system for receiving a beam reflected from the body cavity, to form an image, and image transmission means for transmitting the image formed;
a recess portion having a side wall defined by said cylindrical member, a bottom wall defined by said light guide fiber bundle, and an opening at said one end of the cylindrical member; and
a transparent resin layer of a uniform thickness, arranged within said recess portion and sealing the inside of said cylindrical member at said one end thereof, said resin layer having an end face which is substantially flush with said one end of the cylindrical member.
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Accused Products
Abstract
The endoscope of the invention has a very fine insertion section which is capable of being inserted into, for example, a blood vessel. The insertion section has at its outer periphery a thin-walled hollow cylindrical sheath, one end of which has an opening to the outside. The sheath contains a light guide fiber bundle for emitting a beam of illumination light into the blood vessel, an object lens group for receiving a beam reflected from the blood vessel, in order to form an image, and an image guide fiber bundle for transmitting the image formed. In addition, the sheath has at one end thereof a recess portion having a side wall defined by the sheath, a bottom wall defined by the light guide fiber bundle, and an opening to the outside. A transparent resin layer of a uniform thickness is arranged within the recess portion, and seals the inside of the sheath at one end, one end face of the resin layer being substantially flush with the one end of the sheath.
79 Citations
11 Claims
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1. An endoscope comprising:
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a small-diameter insertion section able to enter a body cavity, the insertion section having a hollow cylindrical member one end of which has an opening to the outside, said cylindrical member containing a light guide fiber bundle for emitting a beam of illumination light into the body cavity, an object optical system for receiving a beam reflected from the body cavity, to form an image, and image transmission means for transmitting the image formed; a recess portion having a side wall defined by said cylindrical member, a bottom wall defined by said light guide fiber bundle, and an opening at said one end of the cylindrical member; and a transparent resin layer of a uniform thickness, arranged within said recess portion and sealing the inside of said cylindrical member at said one end thereof, said resin layer having an end face which is substantially flush with said one end of the cylindrical member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification