| 摘要 |
PURPOSE:To reduce the labor and cost of maintenance and shorten an observing time by conducting reflection light from an omnidirectional slot wall, to a photoelectric converting means with an optical fiber, and by composing an observing section to be of a static type without movable sections. CONSTITUTION:On an upper side, an optical fiber 2 for obtaining the observation image of a slot wall is contained, and on a lower side, a slot bending measuring device is contained, and a sonde 1 provided with a slit 3 using a transparent member or a polarizing glass is set. On the optical fiber 2, the tip is directed from the slit 3 to the omnidirectional slot wall, and the other end is branched through a reflection light separating section 6, and they are respectively arranged to be directed to a light source 4 and a photoelectric converting section 5. Then, light from the light source 4 is transmitted to the side of the slit 3 to irradiate the slot wall, and reflection light for observing the slot wall is conducted to the photoelectric converting section 5, and the image data of the slot wall is taken in, and by moving the sonde 1 upward or downward, the observation image continuous in the omnidirection and overall height is contrived to be obtained. |
