光学接触杆是用在万能显微镜、大型工具显微镜及小型工具显微镜上的一种附件。在苏联及德国蔡司厂所生产的这些仪器的附件中,常常有这种设备。 使用这种附件,可大大地提高这些仪器在测量上的准确度以及扩大这些仪器的使用范围,使得在某些很难甚至不可能测量的情况下,仍可借这种 Optical contact rods are used in universal microscopes, large tool microscopes and small tool microscopes as an accessory. This equipment is often found in the accessories of these instruments produced by the Soviet Union and Zeiss plants in Germany. The use of such attachments greatly enhances the accuracy of these instruments in their measurements and extends the use of these instruments so that in the unlikely event that it is impossible to measure,