一、中国古代“冰燧取火”的记载我国古代就认识到了凸透镜的聚焦作用.晋代张华的《博物志》有记载:“削冰令圆,举以向日,以艾承其影,则得火.”用冰取火,似乎不可思议,但这绝非讹传,这是利用了凸透镜对光的会聚作用.二、透镜对光的作用 I. Records of ancient China’s “hail fire” In ancient China, the focus of the convex lens was realized. In the “Natural History” of the Jin Dynasty, Zhang Hua recorded: “Imperating the ice, lifting it to the sun and taking it to , you have to get fire.” It seems incredible to use ice to make fire, but this is by no means a rumor. This is the use of a convex lens to converging light. Second, the role of the lens on the light