pin-hole lens

例句：

1. 1. The pin-hole lensis a small hole in the middle ofthe screen that allows light to pass through.
   针孔镜头是屏幕中间的小孔，允许光线通过。
2. 2. The pin-hole lenswas used to create a clear image onthe film.
   针孔镜头被用来在胶片上产生清晰的图像。
3. 3. The pin-hole lens is often used in microscopesto magnify objects up close.
   针孔镜头通常用于显微镜中，以便近距离放大物体。