文章提出了一种基于DVD原理的非接触光学聚焦探头，它由商用DVD读取头改装而成，已经完成设计与制作。实验结果表明，此非接触探头分辨率优于1nm，测量重复性可达12 nm。目前此非接触触发探头已应用于纳米三坐标测量机上。

This paper presents a non-contact trigger probe based on the commercial DVD pick-up head. The focus sensor and the mechanism have been designed and manufactured. Experimental results show that the non-contact trigger probe can obtains 1nm resolution and a repeatability of 12nm. The non-contact trigger probe can be used on a micro/nano CMM.