pinhole detector

例句：

1. 1.The pinhole detector is used to detect the presence of small objects in a dark room.
   针孔探测器用于在黑暗的房间中探测小物体的存在。
2. 2. The pinhole detector was used to study the behavior of insects in the field.
   针孔探测器被用来研究昆虫在野外的行为。
3. 3. The pinhole detector can be used to detect radiation from distant stars.
   针孔探测器可以用来探测遥远恒星的辐射。