1. This paper introduces the measurement principle and method of small-hole diameter by laser, minus lens, and digital caliber rule, besides it has carried out the contrastive measurement by laser and universal tool microscope.
介绍用激光、负透镜和数显卡尺测量微小孔径的测量原理、测量方法，并用激光和万能工具显微镜对小孔孔径进行了对比测量。