Author Affiliations
Abstract
1 Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu 610209, China
2 Laboratory on Adaptive Optics, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
3 University of Chinese Academy of Sciences, Beijing 100049, China
A simple and straightforward method to objectively measure the transverse chromatic aberration (TCA) at horizontal field angles out to ±10° from the visual axis of the human eye was proposed. Longitudinal chromatic aberration (LCA) was also measured across the visual field. The TCA of a human eye was obtained by deviation of the point spread function (PSF) images. LCA was calculated from the Zernike defocus. The average TCA changing with eccentricity was 0.162 arcmin/degree between 639 nm and 795 nm wavelengths. Near the optic axis of the eye, the average LCA was 0.37 ± 0.02 D, and it increased slightly with eccentricity (up to 0.54 ± 0.02 D).
330.4460 Ophthalmic optics and devices 170.4460 Ophthalmic optics and devices 330.7327 Visual optics, ophthalmic instrumentation Chinese Optics Letters
2018, 16(11): 113301
Author Affiliations
Abstract
1 The Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu 610209, P. R. China
2 The Laboratory on Adaptive Optics, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, P. R. China
3 University of Chinese Academy of Sciences, Beijing 100049, P. R. China
A simple method to objectively and simultaneously measure eye's longitudinal and transverse chromatic aberrations was proposed. A dual-wavelength wavefront measurement system using two Hartmann–Shack wavefront sensors was developed. The wavefronts of the red (639.1 nm) and near-infrared (786.0 nm) lights were measured simultaneously for different positions in the model eye. The chromatic wavefronts were converted into Zernike polynomials. The Zernike tilt coe±cient (first term) was used to calculate the transverse chromatic aberration along the x-direction, while the Zernike defocus coe±cient (fourth term) was used to calculate the longitudinal chromatic aberration. The measurement and simulation data were consistent.
Chromatic aberration Hartmann–Shack wavefront sensor simultaneity Zernike coe±cient Journal of Innovative Optical Health Sciences
2018, 11(4): 1850021
1 中国科学院光电技术研究所, 四川 成都 610209
2 中国科学院大学, 北京 100049
3 中国科学院自适应光学重点实验室, 四川 成都 610209
在早期的研究中，采用出、入瞳直径相等的双通系统进行人眼像差测量时，两个通道的奇像差相互抵消，造成奇像差(如彗差)无法测量。本文建立全新的模拟眼模型进行实验，验证双通系统在波前测量时，是否存在人眼奇像差抵消的现象。采用典型双通系统——哈特曼波前探测系统进行实验，并将出瞳光阑直径固定为6 mm，改变系统入瞳光阑大小（1~8 mm）。实验结果表明，双通系统中，人眼奇像差在出、入瞳直径相等时可测，且人眼奇像差测量与出、入瞳直径差异无关，因此人眼奇像差测量在双通系统中不存在抵消的现象。
成像系统 视觉系统 双通系统 奇像差 眼模型 抵消现象
