Importance

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Abstract

A fluorescent glass dosimeter comprises a glass element holder including inner and outer envelopes. Each of the inner and outer envelopes has a mask frame used for covering the peripheral portions of the corresponding fluorescent detection surface of a fluorescent glass element. The fluorescent glass dosimeter further comprises upper and lower cases. The upper case serves as a pivotable lock member and includes a lock portion, the locking condition of which can be released by means of a magnet. The lower case is adapted to receive the glass element holder. The upper and lower cases are engageable with each other at their slide portions. The glass element holder includes an integral index plate havig an identification hole code at a predetermined location. A direction regulating member is provided for the lower case, and a portion engageable with the direction regulating member is provided for the glass element holder. The fluorescent glass holder is positioned as a result of the engagement between the direction regulating member and the engageable portion of the glass element holder. A filter, used for adjusting energy dependency upon a radiation exposure, is located on the inner side of the upper wall of each of the upper and lower cases. A filter, used for adjusting direction dependency upon an incident radiation, is located on the inner side of the side wall of the lower case.

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First Claim