准直仪由于精度高、适应性广等优点越来越多地应用于各种测试中。人们用它来测量大型机床导轨的直线性时,经常碰到被测导轨长度超过准直仪说明书中规定的工作距离,此时,人们往往误认为准直仪不能胜任测量工作。其实不然,用准直仪测量导轨直线性时, Collimators are increasingly used in various tests due to their high accuracy and wide adaptability. When people use it to measure the linearity of a large machine tool guide rail, the length of the guide rail often encountered exceeds the working distance specified in the collimator’s manual. At this moment, people often mistake the collimator for measurement work. In actual fact, the use of collimator linear guideway,