Abstract: An instrument for the inspection of well bores includes an improved light source contained within the same pressure barrel as the camera. A low power lamp is disposed within an elliptical-shaped reflector that reflects the lamp light to a focal point distal of the reflector. Optical fibers are disposed at that focal point and conduct the light received from the lamp to form an array of light sources disposed about the camera. An annular window disposed in the line of illumination of the array of light sources directs the illumination into the field of view of the camera. The light source arrangement provides an unobstructed and illuminated field of view for the camera. Because of the increased efficiency of the light source that includes the described elliptical reflector, a self-contained power system may be used in the instrument thereby resulting in a much smaller support cable for the instrument with the ability to inspect much smaller boreholes. Standard size batteries may be used in the power system.

Abstract: An instrument probe contains an improved camera and light source arrangement which; and is positioned behind the camera for providing indirect illumination of the passage being inspected by the camera such as the contents of the bore hole or its casings. The light source is physically separated from the camera thus providing insulation to the camera from heat produced by the light source. The camera housing comprises a quick connect and disconnect latch which allows for the swift changeover of camera components at the distal end of the instrument probe. A parabolic reflector at the light source directs light distally to the instrument body. A second reflector is located on the camera body to further reflect light towards the walls of the passageways, thereby enhancing the indirect light funneled to the area being inspected by the camera.