从汉代铜镜纹饰看圆规在制图中的应用

通过对汉代的内向连弧纹镜的研究后发现，这种纹饰是古人用圆规分出的等分。进而对四神博局镜的背纹进行研究后发现，四神博局镜背纹中的几何纹饰也全部是采用圆规及直尺经过精心绘制而成。直至今日还可以看到，四神博局镜背纹中的几何纹饰，大都在某两条线的相交点上。从而说明，汉代的先民已具有了一定的机械制图水平。

Application of Compass in Drawing With Evidence from Motifs on Han Bronze Mirror

Based on studying Han bronze mirrors decorated with arc lines motif or four gods motif, the author suggests that they were all done with assistance of compass. That the geometrical designs on the back of bronze mirrors with four gods motif are exactly at the crossing point of two straight lines is an excellent example to show that people in the Han dynasty have already achieved certain knowledge on mechanical drawing.