title: Decoupling algorithm of a double-layer bimorph deformable mirror: analysis and experimental test.
abstract: With the increasing requirements on spatial resolution and actuator pitch, multilayer bimorph deformable mirrors are coming into wider application in adaptive optics. This paper discusses the coupling of actuators of multilayer bimorph deformable mirrors. A decoupling algorithm based on controlling gradients directly is presented. And a closed-loop adaptive optics system, which consists of a double-layer bimorph deformable mirror and a Shack-Hartmann wavefront sensor, is set up to validate this decoupling algorithm. Experimental results show that the intensity distribution at the image plane of the distorted wavefront is effectively improved when the modified closed-loop control is on. Besides, the experimental results fit well with the conclusion of numerical simulation.
authors.affiliation: Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China. ningyu_0205@126.com
authors.forename: Yu
authors.initials: Y
authors.lastname: Ning
authors.forename: Bo
authors.initials: B
authors.lastname: Chen
authors.forename: Hao
authors.initials: H
authors.lastname: Yu
authors.forename: Hong
authors.initials: H
authors.lastname: Zhou
authors.forename: Huafeng
authors.initials: H
authors.lastname: Yang
authors.forename: Chunlin
authors.initials: C
authors.lastname: Guan
authors.forename: Changhui
authors.initials: C
authors.lastname: Rao
authors.forename: Wenhan
authors.initials: W
authors.lastname: Jiang