| 摘要 |
<p>A pin hole detector, wherein light (L) passed through a pin hole (P) along a Z-axis direction is bound to a light detection element (4) but, since the advancing direction of noise light other than the light passed through the pin hole (P) is tilted relative to the Z-axis, the binding of the noise light to the light detection element (4) is limited by an optical fiber plate (1) and light control films (1b, 1c, 2), whereby the detector does not necessarily need a closed space when detecting, and can easily detect the pin hole (P).</p> |
