MING Ming,CHEN Tao,XU Tian-shuang.High-resolution vehicle-based adaptive optical system with two-grade tip/tilt correction[J].Optoelectronics Letters,2018,14(6):411-416 High-resolution vehicle-based adaptive optical system with two-grade tip/tilt correction Author Name Affiliation MING Ming  Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China  CHEN Tao  Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China  XU Tian-shuang  School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130012, China  Abstract:       The images obtained by a large optical detection system (>500 mm) are always blurred by atmospheric turbulence. To address this blurring, an adaptive optical system is urgently needed. Here, a 1.3 m vehicle-based adaptive optical system (VAOS), located on the Nasmyth focus, is investigated. A two-grade tip/tilt steering mirror is used to eliminate tracking jitter and atmospheric tipping error. Pupil matching and cooperation between the deformable mirror and the wavefront sensor are adopted to achieve high-order aberration measurement and correction via closed-loop correction and to allow the telescope to obtain high-quality imaging. For different seeing conditions and site locations, the VAOS achieves the sensing over the wavelength range from 0.5 μm to 0.7 μm using a Shack-Harmann wavefront sensor and the correction with a 97-unit deformable mirror for an imaging spectrum range from 0.7 μm to 0.9 μm. Moreover, the maximum detection capability of the system is greater than a visual magnitude of 5, and the angular imaging resolution is better than 0.3". Hits: 832 Download times: 0 View Full Text    Download reader