BORE HOLE SCANNER WITH POSITION DETECTING DEVICE AND LIGHT POLARIZERS

摘要

A bore hold scanner includes a light projecting device for projecting a light beam toward a bore hole wall surface. conical mirror is arranged coaxially with respect to a sonde for condensing light reflected from the bore hole wall surface. An image forming device is arranged in front of the conical mirror. A photoelectric transducing device converts a light signal into an electric signal. Optical fibers introduce an image, which is formed on concentric circles by the image forming device, to the photoelectric transducing device. A data processing device scans and extracts signals from the photoelectric transducing device, and generates and processes image data indicative of the bore hole wall surface. A sonde position detecting device detects the orientation and position of the sonde. Rotating portions are dispensed with by using the conical mirror and optical fibers, and a linear CCD array can be used as the photoelectric transducing device.