Dosimeter glass element, method for manufacturing same, and dosimeter holder
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United States of America Patent
Stats
-
Sep 23, 2003
Grant Date -
Apr 17, 2003
app pub date -
Dec 14, 2001
filing date -
Sep 4, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A cylindrical silver-activated phosphate glass base material 2 is placed inside a heater 1. The upper end of this base material 2 is set in a supporting section 3, and an extending section 4 provided in vertically movable fashion by means of a drive device is attached to the lower end thereof. As the base material 2 is softened by the heating of the heater 1, and the extending section 4 is lowered by operating the drive device, the base material 2 is extended and assumes a thin bar shape. The extension rate of the extending section 4 driven by the drive device is controlled by an external diameter control section 5, while detecting the external diameter, in such a manner that the external diameter of the extended portion is uniform. The extended portion 6 of the base material 2 is cut to uniform lengths, and the cut faces thereof are polished by a polishing device, thereby yielding a cylindrical dosimeter glass element 7a.
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