10 May 2007 Laser beam director system monitoring the alignment state with a null reflector
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The laser beam director (LBD) is a reflective telescope which has a long optical Coude path. Its optical path can be off the original aligned if rotational jitter of the telescope turret occurs or structural deformation in the LBD due to external disturbances occurs. It can make the laser beam deviate from the line of sight of the telescope. Therefore misalignment must be monitored and corrected. We adapt null optics to the telescope in order to monitor alignment state of the LBD. Misalignment is corrected in real time through the fast steering mirror located between the primary and secondary mirror of the telescope. Test results on rotation of the telescope turret show that aligned state of the LBD is kept in spite of rotational jitter of the turret.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yeon Soo Kim, Hyun Sook Kim, Yong Chan Park, Eung Cheol Kang, Soo Sang Lee, Jeong Ju Kim, Hae Dong Eom, Sung Un Park, "Laser beam director system monitoring the alignment state with a null reflector", Proc. SPIE 6569, Acquisition, Tracking, Pointing, and Laser Systems Technologies XXI, 656909 (10 May 2007); doi: 10.1117/12.718106; https://doi.org/10.1117/12.718106


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