| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a transparent-object detector in which the degradation of an element is not generated and which is low-cost. SOLUTION: The transparent-object detector contains a phosphor 14 which receives ultraviolet rays which are transmitted through a transparent bottle 12 to be detected from an ultraviolet light source 11. The phosphor 14 has a thickness at which only the ultraviolet rays at a wavelength of 330 nm or less are received with good efficiency.</p> |
