人眼波前畸变的实时动态校正  

Real-time correction for dynamic wave-front aberrations in human eye

作　　者：王青玲[1] 向东[2] 孙彦杰[3] 王希成[4] 程海燕[4] 

机构地区：[1]中国地质大学地球物理与空间信息学院,湖北武汉430074 [2]华中科技大学光电子信息与工程学院,湖北武汉430074 [3]中国国防科技信息中心,北京100036 [4]中国地质大学数学与物理学院,湖北武汉430074

出　　处：《光电子．激光》2008年第6期847-850,855,共5页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(10476010)

摘　　要：以自适应光学技术为基础塔建了高分辨视网膜成像系统。利用微变形反射镜(DMs)作为波前校正器件,将镜面的形貌、波前及镜面的响应函数表示为泽尼克Zernike多项式的线性组合,利用直接迭代算法及控制电压矩阵改变镜面形貌,从而实现对眼睛波前畸变的适时校正。校正后残余误差的平方根值小于λ/7,接近衍射的极限分辨率。实验表明此闭环系统带宽小于5Hz,能校正多数情况下眼睛的动态波前畸变,能对眼科医学的诊断提供一定的帮助。A high-resolution retina imaging system based on adaptive optics technology is built. We use a deformable mirror as a wave-front corrector. The surface of the mirror,wave-front and the influence functions are expressed in terms of an expansion of Zemike＇s polynomials. We use a straightforward iterative algorithm and control matrix to control the surface of deformable membrane in order to compensate the eye＇s aberration in real-time. After correction,we can get a root mean square （RMS） correction precision of lower than 2/7 which is nearly the diffraction limited resolution. The experiment shows that the closed loop bandwidth is lower than nearly 5 Hz,which is capable to track most of the dynamics aberration in human eye and aid eye medical diagnosis so the system has a good future in eyesight＇s correcrion.

关 键 词：自适应光学 眼睛波前畸变 控制矩阵 Zemike多项式 

分 类 号：R318.51[医药卫生—生物医学工程]