| 摘要 |
PURPOSE:To increase the X-ray sensing amount without enlarging a thermal conductive rod by forming an X-ray passage window in that part of cylinder periphery which mates with a specimen, and fitting an X-ray sensing element to the thermal conductive rod so that the X-ray incident through the window can be sensed. CONSTITUTION:A thermal conductive rod 6 is mounted on a shaft L1, which intersects approx. perpendicularly to the optical axis Z and is apart a distance lfrom the optical axis Z. A cylinder 9 is formed with bottom and that portion on its periphery which faces a specimen 4 is provided with an X-ray passage window 11 with a film affixed. A notch 12 is provided at that peripheral part of thermal conductive rod 6 which faces this window, and an X-ray sensing element is fixed in the axial direction. This allows enlarging the surface area of the light receiving surface of X-ray sensing element without requiring enlargement of the cylinder to lead to enhancement of the sensitivity without causing great size of the construction. |
