光学演示箱可进行光的直线传播、反射、小孔成像、透镜的会聚和发散，凸透镜放大成像等实验。
J251 Optics Demonstrator
For the demonstration of rectilinear propagation of light; reflection; refraction; image forming through an aperture; conversion and emission of the lens; the imagery of convex lens.