A novel of structural response reduction for catadioptric telescope through the modal frequency shifting method

This article presented the design improvement based on the modal frequency shifting method for resolving the structural response excitation of a catadioptric telescope. For the high image quality demand optical system, the positioning stability of optics is crucial. Taking the catadioptric telescope for example, the most sensitive part is the position of secondary mirror within several micrometer tolerance along optical axis. Therefore, the opto-mechanical design for maintaining the positioning of optics while the system suffering from the harsh environmental vibration becomes important.