Highly Dynamic and High Precision Self Balanced Optical Mechanism

摘要

Ongoing developments of instruments reveal the need for fast and precise mechanisms [1]. These requirements are all the more significant when large payloads of hundreds grams, such as mirrors, optical plates, corner cubes or antennas are involved in the motion. Indeed, highly dynamic kinematics coupled with large inertia lead to parasitic reaction forces that interfere on the accurate measurement. This paper describes the study of a tilt mechanism reaching 300μrad of stroke in less than 3ms while cancelling at the same time the reaction forces resulting from this fast motion: Firstly a trade-off study leads to qualitative evaluation of the mechanism. Then a detailed mechanical design is performed to provide relevant model for automatic and control. Finally a test campaign is realized to characterize the prototype