Accommodation-based liquid crystal adaptive optics system for large ocular aberration correction.

According to ocular aberration property and liquid crystal (LC) corrector characteristics, we calculated the minimum pixel demand of the LC corrector used for compensating large ocular aberrations. Then, an accommodation based optical configuration was introduced to reduce the demand. Based on this an adaptive optics (AO) retinal imaging system was built. Subjects with different defocus and astigmatism were tested to prove this. For myopia lower than 5D it performs well. When myopia is as large as 8D the accommodation error increased to nearly 3D, which requires the LC corrector to have 667 x 667 pixels to get a well-corrected image.

[1]  刘永刚,et al.  Diffractive characteristics of the liquid crystal spatial light modulator , 2007 .

[2]  Jungtae Rha,et al.  Adaptive optics flood-illumination camera for high speed retinal imaging. , 2003, Optics express.

[3]  Li Xuan,et al.  Liquid Crystal based adaptive optics system to compensate both low and high order aberrations in a model eye. , 2007, Optics express.

[4]  M L Rubin,et al.  Spectacles: past, present, and future. , 1986, Survey of ophthalmology.

[5]  Junzhong Liang,et al.  Objective measurement of wave aberrations of the human eye with the use of a Hartmann-Shack wave-front sensor. , 1994, Journal of the Optical Society of America. A, Optics, image science, and vision.

[6]  Xin Hong,et al.  Requirements for segmented correctors for diffraction-limited performance in the human eye. , 2005, Optics express.

[7]  D R Williams,et al.  Supernormal vision and high-resolution retinal imaging through adaptive optics. , 1997, Journal of the Optical Society of America. A, Optics, image science, and vision.

[8]  I Iglesias,et al.  Closed-loop adaptive optics in the human eye. , 2001, Optics letters.

[9]  Q. Mu,et al.  Effects of the space-bandwidth product on the liquid-crystal kinoform. , 2005, Optics express.

[10]  Gleb Vdovin,et al.  Correction of low order aberrations using continuous deformable mirrors. , 2008, Optics express.

[11]  Scot S. Olivier,et al.  High-resolution adaptive optics scanning laser ophthalmoscope with dual deformable mirrors for large aberration correction , 2007, SPIE BiOS.

[12]  Sotiris Plainis,et al.  The effect of ocular aberrations on steady-state errors of accommodative response. , 2005, Journal of Vision.

[13]  David R. Williams,et al.  Recent Advances in Retinal Imaging With Adaptive Optics , 2005 .

[14]  Norberto López-Gil,et al.  Ocular wave-front aberration statistics in a normal young population , 2002, Vision Research.