Adaptive optical system based on modulation and modulation-free combined pyramid wave-front sensor

Abstract

The invention discloses an adaptive optical system based on a modulation and modulation-free combined pyramid wave-front sensor. The adaptive optical system comprises a wave-front correction module, a beam-splitting module, an imaging module, a pyramid wave-front sensor module and a control module, wherein before the adaptive optical system works, the pyramid wave-front sensor in a modulation operating mode is utilized to measure the transfer function of the system, and when the adaptive optical system works, the pyramid wave-front sensor in a modulation-free operating mode is utilized to perform closed-loop control. According to the adaptive optical system, the signal to noise ratio can be improved when the transfer function of the system is measured, and a stable transfer function matrix is obtained; and meanwhile, the detection sensitivity can be effectively improved in the closed-loop control process.

Description

technical field

[0001] The invention relates to an adaptive optics system based on a modulated and non-modulated combined pyramidal wavefront sensor. Background technique

[0002] Adaptive optics technology uses optoelectronic devices to measure wavefront dynamic errors in real time, uses fast electronic systems for calculation and control, and uses active devices for real-time wavefront correction, so that the optical system has the ability to automatically adapt to changes in external conditions and maintain a good working condition . Generally, an adaptive optics system includes three basic components: a wavefront sensor that detects wavefront errors, a wavefront controller that provides a wavefront correction signal, and a wavefront corrector that dynamically corrects distortion. Among them, the wavefront sensor measures the wavefront error from the target or the beacon near the target in real time. It is the core unit device in the adaptive optics system, and typically...

Images