Fiber optic bore inspection probe

Abstract From the Canadian patent

A bore inspection probe utilizing optical fibers is disclosed. A first layer of optical fibers and a second layer of optical fibers are placed over a tubular mandrel having a circular cross-section and a mirror, is placed adjacent the distal ends of the first and second optical fiber layers within the probe. The proximate ends of the optical fibers forming the second optical fiber layer are gathered into a bundle for exposure to a light source, whereas the proximate ends of the optical fibers forming the first optical fiber layer are fanned outwardly adjacent the end of the probe to form a thin optical fiber line. Light is transmitted to the surface of the bore via the second optical fiber …