人眼像差哈特曼测量仪的重复性测试

人眼像差哈特曼测量仪利用 Hartmann-Shack 波前传感器探测波前,并用 Zernike 多项式实现波前的重建。测试结果的重复性对该仪器来说是至关重要的。此仪器对模拟人眼静态像差和活体人眼动态像差分别进行单帧采集和连续采集,所得的模拟人眼静态像差 Zernike 系数的标准偏差的最大值,PV 与 RMS 依次为 0.016?,0.061?和 0.006?;活体人眼动态像差 Zernike 系数的标准偏差的最大值,PV 与 RMS 依次为 0.045?,0.167? 和 0.030?,这些指标都小于 ?/5,表明该仪器具有较高的重复性。

A test of repeatability of human eye aberration measuring instrument with Hartmann sensor

The human eye aberration Hartmann measuring instrument measures wavefront with Hartmann-Shack wavefront sensor and wavefront reconstruction is implemented with Zernike polynomial. Single frame sampling and continuous sampling for static aberration of simulated human eye and dynamic aberration of human eye are carried out with the instrument. The maximum deviation of Zernike coefficient, PV value and RMS standard error for the obtained static wavefront aberration of the simulated eye are 0.016, 0.061 and 0.006 wavelength, respectively. The maximum deviation of Zernike coefficient, PV value and RMS standard error for the dynamic human eye wavefront aberration are 0.045 , 0.167 and 0.030 wavelength, respectively. All these specifications are less than 1/5 wavelength and this shows that the instrument has a higher repeatability.