High Precision Scanning Revolving Stage of A Multi-Waveband Solar Spectrograph

A high precision scanning revolving stage,with small step lengths specially developed for the transformation of a multi-waveband solar spectrograph of the Yunnan Observatory can be used to realize the automatic scan of the solar image.When tlie solar image is scanned,the vertical axis of Lhc stage wobbles within 1",the scanning step length devifiteii at ail angle of 0.01° or 0.005° and the accuracy of scanning is 0.001°.Therefore,it is a higlicr precision scanning device for observing the spcclrum,velocity field,etc.,of a solar active region.