The prototyping quality made by annular scanning is far better than this of grating scanning . one kind of new sub - area solution that is based on annular scanning is proposed . the arithmetic of this solution is so easy that the problem of low prototyping efficiency that is induced by complicated arithmetic has been greatly resolved Sls中环形扫描可以得到比光栅式扫描好得多的成型质量，本文提出了一种全新的基于环形扫描的分区方法，该种分区方法的算法简单，很大程度上解决了环形扫描中由于算法复杂所导致的成型效率不高的问题。
