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随着激光计量技术的发展,三面直角棱镜(又称锥体棱镜或四面体)的应用也日益普遍。三面直角棱镜常常是激光计量仪器中的关键零件,对其直角误差和面形误差往往提出很高的设计要求,如直角误差不大于O.3″～1″,面形误差不大于0.1～O.3个光圈。目前一般采用单件手修的加工方法,效率很低,检验方法也受测量精度和设备条件的限制,远远不能适应成批生产的要求。我们在研制“光电光楔测角仪”时,设计加工了如图1所示的三面直角棱镜。加工中试用了成盘加工和快速检验直角误差的方法。
With the development of laser measurement technology, the application of three-sided right-angle prism (also known as pyramidal prism or tetrahedron) is also increasingly common. Three-sided right-angle prism is often the key part of laser measuring instruments, and its right-angle error and surface shape error often put forward high design requirements, such as right-angle error is not greater than O.3 “~ 1”, surface shape error of not more than 0.1 ~ O .3 aperture. At present, the processing method of single hand repair is generally used, and the efficiency is very low. The test method is also limited by the measurement accuracy and equipment conditions, and can not meet the requirements of mass production. We are in the development of “optical wedge goniometer”, the design and processing as shown in Figure 1, the three right-angle prism. Processing trial of a plate processing and rapid test right angle error method.