光學演示箱可進行光的直線傳播、反射、小孔成像、透鏡的會聚和發散，凸透鏡放大成像等實驗。
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.