High-resolution vehicle-based adaptive optical system with two-grade tip/tilt correction

• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2018,（6）
• 页码范围: 411-416
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s11801-018-8055-4

摘要

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″.