No-wavefront-detection adaptive optical system based on real-time phase difference technology

Abstract

The invention discloses a no-wavefront-detection adaptive optical system based on the real-time phase difference technology, belongs to the technical field of optics, and aims at problems of the conventional no-wavefront-detection adaptive optical technology. The system employs a method which comprises the steps: enabling the residual wavefront of to-be-corrected wavefront aberration after compensation through a deformation mirror to be transmitted to a beam splitter prism, dividing the residual wavefront into two beams through the beam splitter prism, converging the two beams to two CCD cameras through two imaging lenses, and obtaining focal plane and defocus plane fuzzy image patches; taking the image information as a known input quantity, directly solving a corresponding drive control voltage through a linear phase different algorithm module, driving a control circuit module to be applied to a deformation mirror through a wavefront corrector, and enabling the deformation mirror to generate a compensation quantity without wavefront distortion; collecting the focal plane and defocus plane images corresponding to the corrected system through an imaging system, recalculating a corresponding correction voltage at this moment, and carrying out the iteration of the above operations till the wavefront error is completely corrected. The system is used on an adaptive optical closed-loop system.

Description

technical field [0001] The invention belongs to the field of optical technology, and relates to a novel adaptive optical system, in particular to an adaptive optical system without wavefront detection based on real-time phase difference technology. Background technique [0002] The establishment and development of adaptive optics theory first originated in astronomy, and its application in astronomical observation has always been the main application direction of this technology. The adaptive optics system usually uses a wavefront sensor to detect the phase information of the distorted wavefront, and uses a wavefront corrector to correct the distorted wavefront, such as figure 1 shown. Due to the fast speed and high precision of the Shack-Hartmann wavefront sensor, it is widely used in the adaptive optics system with high real-time requirements. However, with the expansion of the application field of adaptive optics technology, such as free-space optical communication, ext...

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Problems solved by technology

[0004] The present invention aims at the problems of slow convergence speed, inability to meet real-time requirements and complex implementation means of current wavefront-free adaptive optics technology, and provides a novel wavefront-free adaptive optics system based on real-time phase difference technology, which has a simple structure , High light energy utilization rate, fast convergence speed, small amount of calculation, no need to define basis functions or calibration in advance, simple implementation methods, etc.

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