一、问题的提出测微准直望远镜与零距直角头组合使用时,使光学视线转折90°,用来建立互相垂直的光学视线或与光学视线垂直的光学平面及若干个互相平行的光学平面等,是最常用的方法。使用这一方法时,人们往往只注意到测微准直望远镜与零距直角头的互换使用,而容易忽视测微准直望远镜与零距直角头组合后,产生了新的光轴与机械轴的同轴度误差。该误差有时远大于测微准直望远镜的光轴与机械轴的 First, the issue put forward micrometer collimation telescope with zero-angle right-angle head combination of use, the optical line of sight turning 90 °, used to establish mutually perpendicular optical line of sight or optical line of sight perpendicular to the optical plane and a plurality of optical planes parallel to each other Etc., is the most commonly used method. When using this method, people often only noticed the interchangeability between micrometer collimation telescope and zero-pitch right-angle head, and easily overlooked the combination of micrometer collimation telescope and zero-pitch right-angle head, resulting in a new optical axis and mechanical Axis of the coaxial error. The error is sometimes much larger than the optical and mechanical axes of micrometer collimation telescopes