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US 4,784,464 AGranted
Endoscope optical fiber bundle
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorTeruo Ouchi
Life of this patent
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Abstract
A fiber optic endoscope in which a bundle of optical fibers are sealed in a flexible cover tube with a lubricant. The cross section of the central part of the cover tube is about 62% of the cross section of the optical fibers when tightly bundled.
Claims11
An optical fiber endoscope, comprising:
- a flexible outer tube;
- a flexible cover tube inserted in said outer tube and having a middle substantially circular portion of sectional area S;
- a plurality of optical fibers inserted and sealed over substantially their entire length in said cover tube;
- and
- a lubricant sealed in said cover tube;
- wherein a sectional area s of said plurality of optical fibers when tightly bundled satisfies the relation
- 0.55S.ltoreq.s.ltoreq.0.69S.
4 more elements
Dependencies are inferred from the claim text.