四发射单接收光学非接触测头

研究开发了一种具有4个发射光源和1个CCD摄像机作为接收装置的光学非接触测头．测头可以用来测量包括具有强反射表面的曲面．测头基于三角法工作原理．在恰当设计的情况下，至多只有1路从工件表面反射回来的光，能够进入CCD摄像机．通过将相应通道切断，很容易消除镜面反射光的影响．这时测头就相当于1个三发射单接收光学非接触测头．测头可以同时用来测量表面的位置和方向．对于具有很大倾斜的表面具测头仍能正常工作,采用干涉滤光片消除了环境光的影响．提出了一种系统的标定方法．通过对量块的测量证实了系统工作的正确性和有效性并给出了实验结果．

A New Optical Noncontact Probe with Four Incidence Lights and a Receptor

An optical noncontact probe with four incident lights and a receptor in form of a CCD camera has been developed. This probe can be used for measuring sculptured surfaces including high-reflective ones. The probe works on triangulation principle. By proper design under any situation only no more than one reflecting light from the workpiece goes to the CCD camera and it is easy to eliminate the effect of specular reflection by switching the corresponding channel off and the probe works as a probe with three light sources and a receptor. This probe can be used for measuring both the position and inclination of the surface. It allows measuring parts with very large inclination. An interference filter is introduced to the probe to eliminate the influences of the environment light. A method for system calibration is proposed. The effectiveness of the proposed system has been tested by measuring gage blocks. Experimental results are presented.