| 摘要 |
PURPOSE:To increase the condensing efficiency and thus to enhance the S/N by inserting the reflective optical element between the storage-type phosphor plate and the photo detector which are put extremely close to each other. CONSTITUTION:Photo detector 12 is put close to storage-type phosphor plate 11 as much as possible, and then reflective optical element 14, featuring so small size that can be ignored in comparison with the receiving surface of detector 12, is inserted between detector 12 and plate 11. As a result, the excited light passed through between plate 11 and detector 12 is reflected by element 14 to be put into plate 11. Then the light emitted by the excited light is measured through detector 12, thus increasing both the condensing efficiency and the S/N.
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