Visual inspection apparatus for conduits
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Accused Products
Abstract
Visual inspection apparatus for the interior of conduits has a protective, cylindrical housing filled with inert gas under superatmospheric pressure. A radial end wall of the housing has a transparent central portion and at least one transparent peripheral portion. The objective lens system of a TV camera is mounted in the housing cavity behind the central portion. Electric light sources are mounted in the housing behind the peripheral end wall portions. Light of the source is prevented from reaching the camera on a path within the housing by an opaque partition in the housing cavity and by an opaque zone of the end wall separating the central and peripheral portions.
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Citations
11 Claims
- 1. Visual inspection apparatus comprising:
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2. a. a protective housing elongated in a predetermined direction,said housing defining a cavity therein and having a transverse end wall bounding said cavity in said direction,said end wall having a plurality of transparent portions offset from each other transversely of said direction,said end wall having an inner face directed toward said cavity and an outer face, said faces being transverse to said direction;
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b. an objective lens system in said cavity aligned with one of said portions in said direction; c. a light source in said cavity aligned with another transparent portion of said end wall in said direction; d. an opaque partition in said cavity interposed between said light source and said objective lens system, said partition extending inward of said cavity from said inner face and shielding said objective lens system from the light of said source, 1. said end wall havng an opaque zone interposed between said portions thereof and preventing passage of light from said light source through said portions to said objective lens system, said zone extending from said inner face toward said outer face, 2. said partition being aligned with said zone in said direction; and e. camera means in said cavity and associated with said objective lens system for producing an image in response to light received by said objective lens system through said one portion.
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Specification