1995年4月,陕西扶风黄堆60号西周墓出土一件青铜凹面镜(图一),经鉴定为古代聚日光而取火用的阳燧。阳燧最大径为90.5、最小径87.5毫米。图二为阳燧背面,图三为阳燧的实际投影示意线图。其实测尺寸见表一。 In April 1995, a bronze concave mirror was excavated from the Western Zhou Tomb at No. 60, Fufeng, Huanghe, Shaanxi Province (Figure 1). It was identified as Yang Sui with ancient solar daylight. Yang Sui maximum diameter of 90.5, the smallest diameter of 87.5 mm. Figure 2 is the sun Sui back, Figure 3 is the actual projection of Sui Suo schematic diagram. In fact, measure the size see table one.