Close-loop real-time modal reconstruction of wavefornt based on MMDM

TONG Gui; LIAO Wen-he; LIANG Chun

An close-loop real-time algorithm of improvement singular value decomposition(SVD) modal reconstruction of wavefront was introduced in order to solve the optimal control voltages of adaptive optics based on the micromachined membrane deformable mirror(MMDM) and reduce the incident wavefront aberration to the minimum.By adjusting the control parameters such as g1,gθ and W,reconstruction precision and convergence speed of wavefront were optimized.Wavefront aberration from the human eye was introduced as the incident wavefront of adaptive optics,and the reconstruction precision and convergence speed were improved by comparing the existent algorithms of wavefront reconstruction.As a result,the close-loop real-time algorithm of the improved SVD to some extent settled the control voltages of MMDM,which has the characteristic of great intercourse membrane and monotony but nonlinear driving electrode.This algorithm has good application and flexibility.

Corresponding author: LIAO Wen-he, cnwho@nuaa.edu.cn;

1. College of Mechanical & Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Received Date: 2007-07-24

Accepted Date: 2008-01-10

Available Online: 2008-12-25

Abstract: An close-loop real-time algorithm of improvement singular value decomposition(SVD) modal reconstruction of wavefront was introduced in order to solve the optimal control voltages of adaptive optics based on the micromachined membrane deformable mirror(MMDM) and reduce the incident wavefront aberration to the minimum.By adjusting the control parameters such as g1,gθ and W,reconstruction precision and convergence speed of wavefront were optimized.Wavefront aberration from the human eye was introduced as the incident wavefront of adaptive optics,and the reconstruction precision and convergence speed were improved by comparing the existent algorithms of wavefront reconstruction.As a result,the close-loop real-time algorithm of the improved SVD to some extent settled the control voltages of MMDM,which has the characteristic of great intercourse membrane and monotony but nonlinear driving electrode.This algorithm has good application and flexibility.

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Reference (15)

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Close-loop real-time modal reconstruction of wavefornt based on MMDM

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