10 results about "Adaptive optics systems" patented technology

A wavefront control device to which the present invention is applied is provided with: an optical frequency comb generation unit that emits an optical frequency comb having a plurality of optical pulses disposed in numerical order on a time axis; and a wavefront synthesis unit that distributes the plurality of optical pulses of the optical frequency comb incident from the optical frequency comb generation unit to positions different from each other according to the relative phases thereof with respect to the first optical pulse on a plane crossing the traveling direction of the optical frequency comb, and generates a synthesized wavefront of the optical pulses emitted from the positions different from each other. The optical frequency comb generation unit is provided with a phase control unit that controls the repetition frequency and offset frequency of the optical frequency comb.

The application relates to a coaxial multi-waveband different magnification beam expanding system based on a fold-diffraction hybrid lens, which comprises a first lens group and a second lens group which are coaxially arranged in sequence along the light ray incidence direction, and the axial mechanical distance between the first lens group and the second lens group is fixed; the first lens group is a fold-diffraction hybrid element with positive focal power, the divergence ability of the diffraction surface of the first lens group is enhanced with the increase of the wavelength, so that the total equivalent focal length of the first lens group is increased with the increase of the wavelength; the second lens group is a fold-diffraction hybrid element with positive focal power, the convergence ability of the diffraction surface of the second lens group is enhanced with the increase of the wavelength, so that the total equivalent focal length of the second lens group is decreased with the increase of the wavelength. The application designs a self-adapting optical system which can work coaxially at the fiber outlet directly, and can automatically reduce the long-wavelength light spot to avoid the aperture obstruction, while keeping the short-wavelength light spot large to fill the entrance pupil.

The application discloses a ground-layer adaptive optical system error analysis method, and relates to the technical field of astronomical telescopes adaptive optics, which is characterized in that: a first structure function of residual wavefront generated by un-compensated atmospheric turbulence error is calculated; a second structure function of residual wavefront generated by instrument error of the ground-layer adaptive optical system is calculated; the first structure function and the second structure function are linearly superposed to obtain a total performance structure function of the ground-layer adaptive optical system; a long-exposure optical transfer function is calculated according to the total performance structure function, and Fourier transform is performed on the long-exposure optical transfer function to obtain a point spread function of the ground-layer adaptive optical system; wherein the point spread function is used for analyzing error and performance of the ground-layer adaptive optical system.

This invention discloses an error analysis method for a surface-level adaptive optics system, relating to the field of adaptive optics technology for astronomical telescopes. The key technical points are: calculating the first structure function of the residual wavefront generated by uncompensated atmospheric turbulence errors; calculating the second structure function of the residual wavefront generated by instrument errors in the surface-level adaptive optics system; linearly superimposing the first and second structure functions to obtain the overall performance structure function of the surface-level adaptive optics system; calculating the long-exposure optical transfer function based on the overall performance structure function, and performing a Fourier transform on the long-exposure optical transfer function to obtain the point spread function of the surface-level adaptive optics system; wherein, the point spread function is used to analyze the errors and performance of the surface-level adaptive optics system.

The present application relates to a kind of closed-loop control method and system of wavefront sensing-free adaptive optical system, belong to optical communication technical field, solve the problem that wavefront sensing-free adaptive optical system is difficult to realize stable, real-time, reliable wavefront correction under the joint action of strong turbulence, closed-loop delay and deformable mirror actuator constraint.The method collects focal plane PSF image and pre-processes;Residual wavefront estimation neural network is used to estimate the residual Zernike coefficient estimation vector of current frame;Residual wavefront is predicted using autoregressive prediction model, and is aligned to the actual effective time of deformable mirror command by non-integer frame delay compensation, constrained model predictive controller solves the first step optimal deformable mirror voltage increment under voltage amplitude and voltage rate of change constraint, and the corresponding control command is output to deformable mirror actuator, to realize system stable closed-loop adaptive optical correction.The present application improves the real-time, stability and engineering implementability of closed-loop control under high-speed dynamic turbulence.

An adaptive optical system (1) comprising: - at least one optical device (2) adapted to emit and / or reflect and / or transmit optical radiation (o_s) having a wavefront; - a first wavefront quality measuring module (3) adapted to acquire a first wavefront error measurement of the optical radiation (o_s) to provide a first signal (s1) representative of the first wavefront error measurement; - a second wavefront quality measuring module (4) adapted to acquire a second wavefront error measurement of the optical radiation (o_s) to provide a second signal (s2) representative of the second wavefront error measurement; - a wavefront correction module (5,6) adapted to modify the optical radiation to reduce or eliminate the wavefront error;- a processing module (7) operatively connected to the first wavefront quality measurement module (3) to receive at the input the first signal (s1) and operatively connected to the second wavefront quality measurement module (4) to receive at the input the second signal (s2) and to emit, based on the first signal (s1) and the second signal (s2), a control signal (c_s) to control said wavefront correction module (5, 6); wherein: - the first wavefront quality measurement module (3) is configured to sample a plurality of points of said optical radiation (o_s) according to a sampling resolution that can be controlled by the processing module (7);- the processing module (7) is configured to control the first wavefront quality measurement module (3) to decrease its sampling resolution until the processing module (7) determines that a wavefront of said optical radiation (o_s) can be reconstructed and, after said determination, the processing module (7) is configured to emit said control signal (c_s) to perform a first correction through said wavefront correction module (5,6); - after performing said first correction, the processing module (7) is configured to execute an iterative routine acquiring wavefront error measurements through said second wavefront quality measurement module (4) and emitting said control signal to perform a second correction through said wavefront correction module (5,6).;

This invention discloses a method for coordinated correction of optical field intensity and phase based on multi-layer deformable mirrors, belonging to the field of adaptive optics technology. The method involves configuring multiple conjugate deformable mirrors in the optical path. The first deformable mirror is conjugate to the upper turbulent layer and employs a stochastic parallel gradient descent algorithm based on the statistical characteristics of sub-aperture spot intensity, using the variance of sub-aperture spot intensity as the cost function for control. It utilizes the angular spectrum diffraction transmission mechanism to transform upper-layer phase modulation into receiver amplitude modulation, achieving light intensity homogenization. The second deformable mirror is conjugate to the telescope pupil plane, and based on light intensity homogenization, a wavefront reconstruction algorithm is used to perform closed-loop correction of the residual phase. This invention achieves layered decoupled control of light intensity and phase, effectively suppressing strong scintillation effects and expanding the working boundary of adaptive optics systems under harsh atmospheric conditions.

A wavefront correction system and method with evaluation function switching and derivative-free trust region (RDR) is disclosed. This invention relates to the field of optimization and control technology for wavefront-free adaptive optics systems, specifically to a wavefront correction system and method with evaluation function switching and derivative-free trust region (RDR) optimization. The invention organically integrates a phased evaluation function strategy with a model-based derivative-free trust region optimization algorithm, achieving seamless switching of the evaluation function through observation data reuse. The method includes the following steps: simultaneously defining a first evaluation function and a second evaluation function; performing first-stage derivative-free trust region wavefront correction based on the evaluation function, while simultaneously constructing an observation data reuse buffer; switching to second-stage derivative-free trust region wavefront correction; selecting historical sampling points from the observation data reuse buffer, performing second-stage derivative-free trust region wavefront correction based on the observation data, and obtaining the optimal sampling point; updating the wavefront correction value based on the optimal sampling point.

This invention relates to the fields of laser wireless power transfer and adaptive optics, and particularly to a UAV power transfer system based on a laser phased array and a method for full-range aberration correction. The system includes a laser, a preamplifier, a beam splitter, multiple phase shifters, multiple main amplifiers, multiple adaptive fiber collimators, an imaging telescope system, an adaptive optics system, a programmable aberration plate, a beam splitter, a photodetector, and a controller. This invention models the phase noise of the transmitting units within the laser phased array and the atmospheric turbulence distortion in the laser transmission path as a unified "full-range aberration." Through an integrated correction strategy combining near-field aberration physical simulation and internal closed-loop optimization, it effectively overcomes the inherent defects of traditional in-loop methods, such as large beam round-trip transmission delay and reliance on target return signals. This improves the system's correction speed, robustness, and final spot quality and energy transfer efficiency on the UAV target surface when transferring energy to high-speed moving targets.