In the manufacturing of precision turntables, the rotation accuracy of the turntable is an important technical quantitative index that characterizes the manufac... More>>
In the flatness test, the principle of framing with lines is adopted. Measure the straightness of each sampling line on the tested plate separately, and then us... More>>
Adjust the autocollimator and the mirror to ensure that the autocollimator can get the reflected image within the full measuring range. Place the reflector at t... More>>