An important indicator for evaluating the telescope performance is tracking precision, improving the tracking precision of the telescope can obtain higher quality observation data and improve the working efficiency of the telescope. A prototype of the tip-tilt mirror correction system has been designed to improve the tracking precision of the 2.4-meter telescope in Lijiang. The influence of the tracking precision on the observation performance of the telescope was first introduced in the paper, as well as the terminal instruments of the 2.4-meter telescope and major scientific results produced in recent years. The related technologies for improving tracking precision of telescope at domestic and overseas were investigated. The tip-tilt mirror technology was adopted to improve the tracking precision of the 2.4-meter telescope. The principle prototype is designed and the installation test is carried out according to the principle of the tip-tilt mirror. The results showed that the system can realize the correction frequency of 245Hz, and the closed-loop tracking precision of the telescope was improved by 7.3 times. Meanwhile, the coupling efficiency of the High Resolution Echelle Spectrograph was improved by 28.6%, The imaging quality of the fast photometry system had been improved. The test results of the prototype show that the technology of tip-tilt mirror can improve the feasibility of the tracking precision of 2.4-meter telescope. The next generation high precision tracking system upgrades the cassegrain focus mirror to a tip-tilt mirror, it retains the switching function of the original instrument and improves the image quality to a certain extent. The optical design and preliminary theoretical analysis results of the next generation high precision tracking system are presented, and the significance of the tilt mirror technology to the 2.4 meter telescope is prospected.
修改评论