Control method for human eye aberration correction

Abstract

The invention provides a control method for human eye aberration correction. The method is characterized in that on the basis that sensing functions of a wave-front sensor and a deformable mirror, and distortion aberration fluctuation information and aberration measurement noise information are given, a control criterion cost function stably reaches a minimum, and the wave-front sensor, the deformable mirror and time-domain dynamic natures of distortion wave-front information are fully considered; the human eye aberration correction is pre-estimated by adopting a Kalman filter, and the optimal state estimation of a system is obtained under the minimum variance meaning of residual aberration by adopting a linear quadratic gaussian (LQG) control method of combining deterministic state feedback control with Kalman filtering and pre-estimation processing, and therefore, the optimal control is realized on the human eye aberration correction. Indicated by simulation experiments, the control method for the human eye aberration correction provided by the invention is effective in correcting capacity for dynamic aberration.

Description

technical field [0001] The invention belongs to the technical field of human eye aberration control, and specifically refers to a human eye aberration correction control method. Background technique [0002] In the human eye aberration correction control system of adaptive optics, the control target is the continuous residual aberration of the system The average variance can reach the minimum value within a sufficient exposure time, that is, the quadratic minimum criterion of the wavefront phase, thereby establishing the cost function J of the aberration correction control criterion for the adaptive optical system with respect to the control voltage u c (u) as follows: [0003] [0004] in refers to the residual aberration when the control voltage is u at time t, ||·|| 2 is the Euclidean norm, and is the sum of the squares of the residual aberration Zernike mode coefficients, J c The minimization process of (u) is realized by adjusting the size of u according to the...

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Problems solved by technology

On the one hand, in the process of adaptive optics control based on automatic control theory, its control method mainly considers the phase space interaction capability of the system, and ignores the time-domain dynamics of wavefront sensors, deformable mirrors and distorted wavefronts, and its control Guidelines focus on wavefront phase correction, such as trying to make deformable mirrors produce the same Completely conjugated surface shape, so as to achieve the purpose of zero residual aberration, but it is difficult to achieve in actual situations, especially in the correction of human eye aberration, it will even destroy the existing correction effect, so the traditional control theory Adaptive optics aberration correction control method has certain limitations

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