Decoupling control method for multiple wavefront correctors

Abstract

The invention relates to a decoupling control method for multiple wavefront correctors. The decoupling control method for multiple wavefront correctors comprises the following steps of: (1) performing aberration detection by using a hartmann wavefront sensor and decomposing aberration slope information acquired by the hartmann wavefront sensor into two parts comprising low-order aberration mode coefficient and high-order aberration slope information; (2) controlling operation of a low-order aberration wavefront corrector by using the low-order aberration mode coefficient as an intermediate control parameter; and (3) controlling operation of a high-order aberration wavefront corrector by utilizing the high-order aberration slope information. By the decoupling control method, multiple wavefront correctors can be effectively driven to perform aberration correction, coupling error accumulation between multiple wavefront correctors can be inhibited, and the stroke quantity and the correction precision of a self-adaptive optical system can be effectively improved.

Description

technical field [0001] The invention relates to a high-efficiency decoupling control method for multi-wavefront correction devices, which is suitable for adaptive optical systems that need to use multiple wavefront correction devices to perform aberration correction at the same time. Background technique [0002] An efficient decoupling control method for multi-wavefront correction devices, its main function is to simultaneously control multiple wavefront correction devices to correct aberrations in an adaptive optics system with multiple wavefront correction devices, and can effectively suppress multiple wavefront correction devices. The mutual cancellation of the correction effects between the two wavefront correction devices, that is, the coupling phenomenon between the wavefront correction devices can be suppressed. [0003] Achieving high-precision correction of large aberrations is one of the urgent requirements of the development of optical technology for adaptive opt...

AI Technical Summary

Problems solved by technology

Although the latter two types of decoupling control methods can be used for dynamic aberration correction, they both have certain shortcomings.

The main disadvantage is that in adaptive optics, the Hartmann wavefront sensor can only detect the residual aberrations corrected by multiple wavefront correction devices, and only decomposing the residual aberrations can only ensure multiple wavefronts The coupling degree of the correction device is low when correcting the residual aberration, but because the Hartmann wavefront sensor cannot detect the coupling that has occurred between different wavefront correction devices, it is difficult to eliminate or suppress the coupling that has occurred. As the control time increases, some wavefront correction devices will eventually become saturated, and the system stability will decrease ("Woofer-tweeter adaptive optics scanning laser ophthalmoscopic imaging based on Lagrange-multiplier damped least-squares algorithm", BIOMEDICAL OPTICS EXPRESS, Vol.2, No.7, 2011, 1986-2004)

Images