小孔成像演示器的设计与制作

The Design and Production on Demonstrator of Pinhole Imaging

本小孔成像演示器主要由光源、小孔和有光屏的筒身三大部分构成.制作材料简单易寻,小孔部分更换方便,它既能满足教师演示要求,也能给学生留有自主探究的空间.运用控制变量法,可以探究小孔成像与光源形状、孔径大小及小孔形状之间的关系.

The small hole imaging demonstrator is mainly composed of three parts:the light source,the small hole and the barrel of the optical screen.The material is simple and easy to find.Junior high school students have the ability to make their own.It not only meets the requirements of the teacher′s presentation,but also leaves room for students to explore independently.