DocumentCode :
2182697
Title :
Human Eye Aberration Measurement and Correction Based on Micro Adaptive Optics System
Author :
Niu, Saisai ; Shen, Jianxin ; Liang, Chun ; Li, Bangming
Author_Institution :
Coll. of Mech. & Electr. Eng., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
fYear :
2009
fDate :
17-19 Oct. 2009
Firstpage :
1
Lastpage :
5
Abstract :
In view of the characteristics of human eye aberrations, a set of adaptive optics system for real-time wavefront measurement and correction is designed. The system realizes wave-front reconstruction based on the model reconstruction algorithm of Zernike polynomials by obtaining the spot pattern of human eye wave-front aberrations with the aid of Hartmann-Shack wave-front sensor and accessing to high precision centroid data by adaptive centroid detection method. Meanwhile, the need for real-time correction of different characteristics of human eye aberrations is met through the flexible adjustment of parameters of a, beta and w with the aid of closed-loop iterative control algorithm based on singular value decomposition, combined with the features influencing function matrix and human eye wave-front aberrations, with micromachined membrane deformable mirror serving as wave-front corrector. The measurement and correction of wave-front aberrations of human eyes is experimented on the platform of micro adaptive optics system, the result of which indicates that the system can meet accurate measurement and real-time correction of human eye wave-front aberrations with a wide-range application prospect in ophthalmic adaptive optics technology.
Keywords :
Zernike polynomials; adaptive optics; biomedical measurement; eye; micro-optics; patient treatment; singular value decomposition; vision defects; wavefront sensors; Hartmann-Shack wavefront sensor; Zernike polynomials; adaptive centroid detection method; adaptive microoptics system; closed loop iterative control algorithm; high precision centroid data; human eye aberration correction; human eye aberration measurement; human eye wavefront aberration spot pattern; ophthalmic adaptive optics technology; real time wavefront measurement; singular value decomposition; wavefront reconstruction; Adaptive optics; Anthropometry; Humans; Iterative algorithms; Optical design; Polynomials; Real time systems; Reconstruction algorithms; Sensor phenomena and characterization; Sensor systems;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Biomedical Engineering and Informatics, 2009. BMEI '09. 2nd International Conference on
Conference_Location :
Tianjin
Print_ISBN :
978-1-4244-4132-7
Electronic_ISBN :
978-1-4244-4134-1
Type :
conf
DOI :
10.1109/BMEI.2009.5305101
Filename :
5305101
Link To Document :
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