| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a fluorescence glass dosimeter readout device in which the allowable range of laser output can be spread so as to prolong the exchange term of a laser tube without requiring to execute a special work such as adjustment of an optical path. SOLUTION: Ultraviolet rays 4 from a nitrogen glass maser 3 are projected in a measuring part through a transmitting filter system 30. The transmitting filter system 30 is provided with first and second filter holders 33, 34 capable of being switched between a low transmission factor position and a high transmission factor position, and provided with four sorts of transmission factors by combination of the operating positions of the filter holders. Ultraviolet rays 4 passed through the transmitting filter system 30 are separated into two rays by a semi-transparent mirror 8, and projected in a glass element 1 and a reference glass 2. Fluorescence 5 generated in the glass element 1 is received with a multiplier phototube 14, and the measured output of an exposure ray quantity is obtained by a computing circuit 15. Fluorescence 5 generated in the reference glass 2 is received with a photo-diode 20, and the output for correcting sensitivity is obtained by a computing circuit 21.</p> |
