102 results about "Wavefront aberration" patented technology

The invention discloses an optical performance-oriented key geometric error identification method for a large aspheric element multi-axis numerical control machine tool. According to the method, a tool setting point is used as a key node to establish a surface shape error model, geometric errors and surface shape errors of a machine tool are accurately associated, multi-error coupling analysis is simplified, and targeted compensation, online monitoring and real-time correction are achieved. On the basis, a machine tool space error model is constructed in combination with a multi-body system theory, a mapping relation between a surface shape error and wavefront aberration is established by utilizing a ray tracing theory, the wavefront aberration is fitted through a Zernike polynomial, and the contribution degree of each geometric error to the aberration is quantified by means of principal component analysis, so that a key geometric error is identified and compensation is implemented. According to the method, the machining error and the final optical performance are directly associated, and the machining precision and the performance quality of the large aspheric element can be improved. The method is suitable for the manufacturing field of large complex optical elements machined by a multi-axis numerical control machine tool.

The invention relates to the technical field of coupling alignment of single-mode optical fibers, in particular to an optical fiber coupling alignment method and system based on wavefront aberration and a sensitivity matrix. The system comprises an optical measurement module, a processing and control module and a multi-axis precision adjustment platform, and the alignment method comprises the steps that firstly, an interference fringe image is obtained and processed through an interference light path, continuous wavefront is recovered through Fourier transform and phase unwrapping, and a Zernike coefficient for quantizing wavefront distortion is obtained through Zernike polynomial fitting. A sensitivity matrix representing the linear relation between the degree-of-freedom adjustment amount and Zernike coefficient changes is established and serves as a physical guide item to introduce a speed updating formula of a particle swarm optimization algorithm, an SG-PSO algorithm is formed, a particle swarm is guided to conduct directional intelligent search and rapidly output the optimal adjustment amount, and finally a multi-axis precision adjustment platform is driven to complete alignment. According to the method, optimization of wavefront sensing and physical model guiding is effectively fused, and the convergence speed, the alignment precision and the global search capability are remarkably improved.

The invention discloses a wavefront distortion correction method based on a dynamic adaptive MESSA algorithm and a coherent free space optical communication system. The problems that an existing method is prone to falling into a local optimal solution, the correction effect is poor under dynamic turbulence, and the adaptive capacity is weak are solved. According to the method, an individual position is initialized through a Circle chaotic mapping method, iterative optimization is carried out in combination with a Levy flight strategy and a variable spiral search strategy, and a step size control parameter, a safety threshold, spiral strength and a spiral adjustment coefficient are dynamically adjusted through a double-discrimination dynamic adaptive parameter adjustor. And reducing the population scale according to a nonlinear population reduction strategy, finally outputting an optimal individual position, and driving the deformable mirror to perform wavefront correction according to a control voltage vector corresponding to the optimal individual position. According to the invention, the dynamic adjustment of the algorithm parameters and the population structure is realized, and the adaptability, convergence speed and stability of the wavefront distortion correction method in the dynamic turbulence environment are enhanced.

The invention provides a slit-type spectral imaging method based on filtering phase reconstruction and a grating spectrometer. The method comprises the following steps: measuring wavefront aberration of a slit-type grating imaging spectrometer before slit filtering by using a wavefront sensor; based on a slit filtering principle, reconstructing a phase function after slit filtering by using wavefront aberration before slit filtering; and capturing a slit image, and reconstructing the slit image by using the reconstructed filtered phase function of the slit to obtain a final reconstructed image. According to the method, effective recovery of the slit imaging data of the grating spectrometer based on the slit is realized, the influence of optical aberration and image noise on the spectrum and spatial resolution of the spectrometer is effectively eliminated, and the slit imaging quality is remarkably improved and is close to the diffraction limit.

The application discloses a kind of low-quality image super-resolution reconstruction methods based on adversarial generative network, including, with the generation dynamic point diffusion function of differentiable optical diffraction calculation layer, and based on the function, wavefront aberration dynamic compensation mechanism is established, wavefront aberration is predicted and compensated, and the low-resolution input feature of optimization is obtained;According to the optimization feature, generator and discriminator are trained using physical constraint adversarial training strategy, and high-resolution image conforming to optical physical law is generated;The diffraction characteristics of high-resolution image are optimized through multi-scale diffraction consistency verification module, to ensure the physical authenticity and consistency of image under different resolutions;The application can effectively handle the complex degradation characteristics of low-quality image, improve the detail quality and optical rationality of generated image.

The utility model discloses a wavefront debugging and detecting device for a laser beam-expanding lens, which is used for debugging and detecting a laser beam-expanding lens to be detected and comprises a laser light source part, a standard laser beam-expanding lens, a pinhole diaphragm and a shearing interferometer which are sequentially arranged and are coaxial at equal height, and the laser beam-expanding lens to be detected is arranged between the pinhole diaphragm and the shearing interferometer. The laser light source part is used as a standard laser light source, the standard laser beam expanding lens is used for expanding the standard laser light source to an entrance pupil size matched with that of the laser beam expanding lens to be measured, and the small-hole diaphragm is used for limiting the spot diameter of the standard laser light source entering the laser beam expanding lens to be measured; and the shearing interferometer is used for testing the wavefront of the standard laser light source after passing through the to-be-tested laser beam expanding lens. According to the utility model, the laser light source piece, the standard lens and the shearing interferometer are utilized, the wavefront debugging precision is improved, and the wavefront aberration is reduced by observing interference fringes in real time and finely adjusting the lens and guiding lens installation and stress release, so that the problem that the beam expanding multiple is reduced is solved.

The invention discloses a method for obtaining human eye wavefront aberration and a human eye aberration measuring device, and relates to the technical field of optical instruments.The method for obtaining the human eye wavefront aberration is applied to a Hartmann sensor and comprises the steps that an actual slope matrix is obtained through calculation according to a wavefront light spot diagram obtained by the Hartmann sensor; multiplying the generalized inverse matrix of the standard slope matrix by the actual slope matrix to obtain a Zernike coefficient matrix; subtracting the actual slope matrix from the product of the standard slope matrix and the Zernike coefficient matrix to obtain a residual matrix; and updating the Zernike coefficient matrix according to the residual matrix until the residual matrix of the updated Zernike coefficient matrix is smaller than or equal to a preset value. Wherein the standard slope matrix is a matrix formed by wavefront slope of Zernike polynomial full-term superposition. According to the technical scheme provided by the invention, the accuracy of obtaining the wavefront aberration of the human eye can be improved.

The invention provides an optical test function high and low temperature test box control system for electronic components, relates to the technical field of optical test, and provides an optical test function high and low temperature test box control system for electronic components through innovative technologies such as a double-target real-time sensing module, core temperature feed-forward compensation, window distortion active compensation, data validity discrimination and adaptive scheduling. The real junction temperature of an electronic component in a high and low temperature test box is highly consistent with the ambient temperature, the wavefront aberration of an observation window is counteracted in real time, abnormal data are automatically discriminated and remeasured, the temperature control precision is improved to + / -0.1 DEG C and the wavefront distortion residual error is reduced to lambda / 20 through dynamic temperature point selection based on gauss process regression and thermal inertia model game, and the temperature control precision is improved to + / -0.1 DEG C and the thermal inertia model game. The test period is shortened by more than 30%, the data misjudgment rate is lower than 1%, and the test precision, fidelity and efficiency are remarkably improved.

The invention discloses a contact lens defocusing amount optimization method and system, electronic equipment and a medium, and relates to the technical field of data processing. The method comprises the following steps: acquiring reference eye optical data of a tested eye through a wavefront aberration instrument, wherein the reference eye optical data comprises the eye axis length, the corneal curvature radius and the reference value of the lens equivalent refractive power; establishing a correlation model of the eye axis length and the corneal curvature and a correlation model of the eye axis length and the lens equivalent refractive power, and determining a change threshold value of the eye axis length. Acquiring an eye axis length acquisition value through an ultrasonic measuring instrument, and calculating the variable quantity of the eye axis length acquisition value and a reference value; and when the variable quantity exceeds a threshold value, substituting the variable quantity into the correlation model to calculate the estimated values of the curvature radius of the cornea surface and the equivalent refractive power of the crystalline lens, and constructing an optical state parameter set of the eye. And finally, based on the parameter set, calculating defocusing amount values of the contact lens at a plurality of radial positions through a ray tracing algorithm. By implementing the technical scheme provided by the invention, the defocusing amount accuracy of the contact lens can be improved.

An aberration regulation method of a reflective double-beam interference exposure system, comprising: constructing a reflective double-beam interference exposure system, dividing a light beam output by a laser into two double beams with the same intensity, and forming an interference exposure field; constructing an aberration regulation system, testing and recording the aberration of the double-beam light path by using a spherical interferometer, and regulating the wavefront of any light beam in the double beam by using a deformable mirror, so that the aberration of the light beam matches the aberration of the other light beam, and the regulation of the aberration of the interference exposure field is completed. The present application solves the problems of precise assembly and adjustment, wavefront aberration control and the like of the reflective double-beam interference exposure system based on a large-aperture off-axis parabolic mirror, and provides a new solution for the preparation of a meter-level large-aperture, low-aberration diffraction grating.

The invention belongs to the field of atmospheric turbulence wavefront aberration detection, and discloses an atmospheric turbulence wavefront reconstruction method based on an attention-learnable activation cooperation mechanism. The objective of the invention is to solve the problems that the modeling of a full connection layer is difficult due to phase high-order nonlinear coupling of an existing end-to-end neural network in wavefront phase reconstruction, the feature extraction capability of a traditional convolution architecture is insufficient, and the reconstruction error of a Zernike coefficient is unbalanced. The method provided by the invention comprises the steps of collecting in-focus and out-of-focus images of light spots and corresponding distortion phases to construct a training data set, constructing high-precision mapping of high-order aberration characteristics based on an attention encoder and a Colmogorov-Anodel network through a learnable activation function, and performing high-precision mapping on the high-order aberration characteristics through a learning activation function. And optimizing network parameters by using an error weighted root mean square loss function, and finally deploying the neural network which is completely trained to realize high-speed reasoning. The method provided by the invention provides a high-precision and high-speed scheme for atmospheric turbulence distortion wavefront aberration detection.

The invention relates to the technical field of optical fiber sensing and optical fiber device manufacturing, and discloses a femtosecond laser-inscribing polarization-maintaining fiber grating method and system for vector sensing, and the method comprises the following steps: obtaining a stress region image of a polarization-maintaining fiber through a CCD camera, recognizing the slow axis direction of the fiber through image processing, rotating the fiber, and obtaining the stress region image of the polarization-maintaining fiber; an included angle of 45 degrees is formed between the slow axis direction and a preset incident plane of the femtosecond laser; calculating a conjugate phase of wavefront aberration generated when femtosecond laser penetrates through a fiber coating layer and a cladding and is focused to a fiber core, and generating a phase diagram for loading a spatial light modulator; after being modulated by the spatial light modulator, a light beam emitted by the femtosecond laser enters and is focused on the fiber core along the direction of an included angle of 45 degrees, and a grating structure is formed by combining axial scanning and inscribing. Accurate automatic alignment in the fast and slow axis direction and active compensation of transmission aberration are achieved, refractive index modulation birefringence forming a specific included angle with the inherent birefringence axis of the optical fiber can be effectively induced, and therefore the polarization-maintaining fiber grating with the highly controllable reflection spectrum and the asymmetric double-peak characteristic is engraved.

A method of bonding glass to a material includes contacting a first surface of a glass substrate with a first surface of a layer to form a contact location between the glass substrate and the layer; disposing an optical element optically upstream of the glass substrate; and performing a welding step by directing a laser beam onto the optical element such that the laser beam contacts the optical element, passes through the glass substrate at an oblique angle with respect to the glass substrate, and contacts the contact location to bond the glass substrate with the layer. Directing the laser beam onto the optical element imparts a wavefront aberration effect to the optical element. The laser beam is passed through the glass substrate to impart a wavefront aberration effect to the substrate. The wavefront aberration effect of the optical element counteracts the wavefront aberration effect of the substrate.

This invention discloses a method for field-of-view deconvolution image restoration of an imaging system based on wavefront aberration reconstruction, belonging to the field of wavefront aberration measurement and computational imaging technology. The method includes: measuring the wavefront aberration of the optical system under test in an imaging system containing detection markers; setting the measured wavefront aberration as the wavefront aberration of the optical system under test in an imaging system containing pinhole arrays, and simulating and generating point spread functions corresponding to different field-of-view blocks; replacing the detection markers with imaging samples, and acquiring the actual image of the imaging samples through the optical system under test as the image to be restored; dividing the image to be restored into field-of-view partitions, performing deconvolution restoration on each block using the corresponding point spread function, and then stitching the restored block images together to obtain a complete restored image. This invention decouples wavefront aberration measurement from image restoration, achieving effective correction of spatially varying aberrations in a large field of view without increasing hardware complexity, significantly improving the restoration accuracy, efficiency, and consistency of the entire field-of-view image.

The application discloses a kind of illumination system and exposure equipment based on plane wave, comprising: first mirror, wavefront aberration detection module is inclined relative to light incidence direction, first mirror is used to receive light from light source and reflect light;Second mirror, for receiving the light reflected by first mirror and expanding the beam of light;Third mirror, for receiving the light reflected by second mirror and collimating the light back to the target object and reflecting light.The application realizes light path folding through the reflection path of first mirror, second mirror and third mirror, significantly shortens the axial length of illumination system, and significantly saves space.The number of structures of the three mirrors is much less than that of the conventional multi-lens group, and the positioning accuracy requirement of the mirrors is lower than the coaxiality requirement of the multi-lens, which simplifies the overall structure design and assembly process of the illumination system, and reduces the system complexity and use cost.

The present application belongs to the technical field of wavefront distortion measurement, and particularly relates to a wavefront distortion measurement system and method caused by light field waist spot mismatch in a cavity enhancement system. In order to accurately capture the wavefront distortion signal caused by light field waist spot mismatch, an electro-optic modulator (EOM), a convex lens, a three-mirror ring cavity, a plane mirror, a multi-quadrant detector (MPD) and a frequency mixer are sequentially arranged on the outgoing light path of the laser. Through light field modulation, resonance amplification, phase-locked demodulation and quantitative calculation, an error signal reflecting the distortion degree of two types is extracted, the minimum measurable waist spot size and position change are derived, accurate feedback is provided for long-term stable locking of the optical cavity, additional distortion interference caused by the thermal effect of the laser is compensated, and the measurement accuracy and stability of the system are improved.

The present invention discloses a wavefront aberration compensation method based on a nonlinear response cascade model, which uses the frequency reconstruction technology in the process of establishing a Bouc-Wen hysteresis model of a fast steering mirror (FSM). The frequency reconstruction technology can overcome the zero-point drift characteristics of piezoelectric ceramic materials and improve the accuracy and robustness of Bouc-Wen hysteresis modeling. Subsequently, the present invention uses the hysteresis model of FSM for a wavefront corrector with a cascade structure of FSM and a deformable mirror (DM), and proposes a wavefront closed-loop compensation method based on absolute phase distortion based on the model structure of the nonlinear response cascade of the wavefront corrector. Taking absolute phase distortion as the fitting target avoids the accumulation of model errors and hardware noise, so that the wavefront corrector of the FSM and DM cascade can complete the correction of the wavefront with only one closed-loop feedback, thereby improving the compensation capability range, accuracy and efficiency.

The invention discloses a plane wave-based illumination system and exposure equipment, and the system comprises a first reflector, a wavefront aberration detection module is inclined relative to a light incident direction, and the first reflector is used for receiving light from a light source and reflecting the light; the second reflecting mirror is used for receiving the light rays reflected by the first reflecting mirror and expanding the light rays; and the third reflecting mirror is used for receiving the light reflected by the second reflecting mirror, collimating the light and then reflecting the light to a target object. Through reflection paths of the first reflector, the second reflector and the third reflector, light path folding is achieved, the axial length of the illumination system is greatly shortened, and space is remarkably saved. The number of the structures of the three reflectors is far smaller than that of a traditional multi-lens group, the positioning precision requirement of the reflectors is lower than the coaxiality requirement of multiple lenses, the overall structural design and assembly process of the lighting system are simplified, and the system complexity and the use cost are reduced.

The invention discloses a low-quality image filtering method and system, and aims to solve the problems that a conventional filtering method neglects optical characteristics and is insufficient in feature extraction. The method comprises the following steps: acquiring a low-quality image and optical parameters such as aperture shape, focal length and wavelength; a dynamic point spread function is generated based on the improved Fraunhofer diffraction principle, wavefront aberration compensation is achieved through a Zernike coefficient matrix and complex field convolution, and optimization features are obtained; a quality evaluation network including cross-channel convolution, dense convolution and classification sub-networks is used for outputting a quality level, and multi-level filtering is executed in combination with diffraction characteristic optimization and scanning type recognition. The network training adopts a difficult sample sampling and physical constraint confrontation strategy, so that the generalization ability and the physical consistency are improved. The method is suitable for scenes of medical images, security monitoring, industrial detection and the like, and high-quality images can be accurately screened.

The application discloses a kind of optometry methods for high-precision multi-type combination, it is characterized in that, including the following steps: S1, by automatic optometry instrument obtains objective refraction parameter set;S2, based on virtual reality interface implements interactive subjective optometry, generates subjective correction parameter set;S3, using wavefront aberration instrument collection high-order aberration data;S4, carries out refraction adaptability test under dynamic visual scene, obtains dynamic compensation parameter;S5, by multimodal data fusion algorithm generates initial optometry scheme;S6, based on genetic algorithm optimization lens parameter combination;S7, implements double-blind verification test and obtains visual quality score;S8, according to verification result iteration optimization final prescription.It is solved that traditional optometry is in the problem of subjective or objective data split, dynamic visual scene is accurately adapted using eye movement tracking and virtual reality verification, and the safety and efficiency of ophthalmic optical optometry are guaranteed.

The invention discloses an optical lens and a preparation method and application thereof. The optical lens comprises a transparent substrate, a micro-lens array located on the first surface and a super-lens array located on the second surface. The transparent substrate comprises a first surface and a second surface which are oppositely arranged. The microlens array comprises a plurality of microlenses arranged at intervals, each microlens forms a sub-view field, and the plurality of sub-view fields jointly form a total view field. The super lens array comprises super lenses in one-to-one correspondence with the micro lenses, and the super lenses compensate the wavefront difference of the micro lenses through phase distribution. The large field of view is decomposed into a plurality of small sub-fields of view through the micro-lens array, gradient phase distribution is realized through the nano-structure of the super-lens, the residual wavefront difference of the micro-lens is compensated, the aberration generated by the micro-lens is accurately corrected, and after light rays finally reach the imaging sensor array, large FOV seamless imaging can be realized in combination with an image fusion algorithm.

A synthetic aperture quantitative phase imaging method based on a hybrid of digital holography and Fourier ptychography. A programmable LED array which is annularly arranged is mounted on an off-axis digital holographic system for providing oblique illumination at varying angles; accurate noise-containing low-frequency information of an object is obtained by means of digital holography and is used as initial estimation; and then, high-frequency information of the object is reconstructed by means of a Fourier ptychographic algorithm based on intensity measurement, so as to realize synthetic aperture quantitative phase imaging. Using the accurate low frequency provided by holography as initial estimation ensures the accuracy of phase retrieval and wavefront aberration reconstruction, without strictly meeting matching illumination conditions, and reduces the number of intensity graphs required by Fourier ptychography; and a non-interferometric phase retrieval method based on Fourier ptychography improves the imaging resolution to an incoherent diffraction limit, and also effectively solves the problem of inherent speckle noise in digital holography.

The application discloses a cross-scale composite wavefront sensing method based on a deep learning model, combines a Shack-Hartmann wavefront sensor (SHWFS) and off-axis digital holography (OADH) through a composite wavefront sensing system, fuses data of a wavefront measured by the composite wavefront sensing system by using an MSWM-Net model based on a deep neural network, realizes complementary advantages of performances of the two measurement systems, and further obtains a high-confidence reconstructed wavefront. When measuring a wavefront aberration containing different spatial frequencies, the method not only solves the problem of low phase accuracy in SHWFS measurement, but also solves the limitation of wrapping the wavefront in a period in OADH measurement. The feasibility and effectiveness of the method in wavefront detection are verified through tests. The application is more easy to realize quantitative measurement of atmospheric turbulence aberration, can provide design input parameters for an atmospheric turbulence aberration correction system, and can be used for distortion wavefront detection of the atmospheric turbulence correction system.

The invention provides an optical axis marking method and device for a holographic photoetching illumination system, and the method comprises the following steps: carrying out the wavefront measurement of the illumination system through wavefront detection equipment, and obtaining an illumination system transmission wavefront aberration which corresponds to a standard incident optical axis and meets a preset threshold value; an optical axis marking element is arranged at a light inlet of the illumination system and is provided with a central transmission area and a peripheral reflection area; adjusting the pose of the optical axis marking element, so that the center of the optical axis marking element is aligned and calibrated with the standard incident optical axis; replacing wavefront detection equipment with a working light source, and judging the eccentricity and inclination state of an incident light axis of the working light source relative to a standard incident light axis according to the form and position relation of reflected light and incident light of the working light source; and adjusting the pose of the incident optical axis of the working light source to align the incident optical axis of the working light source with the center of the optical axis marking element. The defects of tedious operation and low adjustment efficiency in the adjustment process of the incident optical axis and the optical axis of the illumination system in the prior art are overcome.

The present invention relates to a closed-loop solution method for active optical correction based on iterative updating of influence functions. The method collects the initial influence functions of each actuating unit and replaces outliers. A wavefront sensing system detects and obtains the system wavefront aberration. The voltage to be applied to each actuating unit is calculated based on the relationship between the system wavefront aberration and the initial standard influence function under an ideal state, and the voltage is applied to the corresponding actuating unit. The system wavefront aberration is detected again, and the offset coefficient of each influence function is calculated based on the difference between the control surface shape residual under an actual state and the control surface shape residual under an ideal state. Each influence function is updated once according to the offset coefficient to obtain a new influence function. The new influence function is used as the initial standard influence function in the next round of regulation to achieve closed-loop solution of the correction amount of the wavefront corrector. The present invention realizes real-time iterative updating of the influence function and improves the accuracy of solving the active optical correction amount.

The application discloses a wave aberration sensor compatible with high precision and large dynamic range, and belongs to the field of optical precision measurement and detection. The wave aberration sensor comprises a projection module, an array structured light chip and a detection module. The core idea of the wave aberration sensor is that different characteristic phases are encoded in each sub-aperture based on an array structured light chip, so that a plurality of structured light spots with obvious characteristics can be generated in the focal plane, and the different sub-aperture light spots can be distinguished. Based on the array structured light chip, the wave aberration sensor can realize measurement with a larger dynamic range without sacrificing the measurement precision. The wave aberration sensor can realize measurement of various laser wavefronts and wave aberration detection of various lenses. Therefore, the wave aberration sensor has important practical value in the fields of laser processing, laser surgery, ophthalmic detection and optical imaging.

To provide vision quality assessment based on a machine learning model and wavefront analysis.SOLUTION: There is provided a system 10 and method for assessing vision quality of an eye E. A controller C includes a processor P and a tangible, non-transitory memory M in which instructions are recorded, and is configured to selectively execute at least one machine learning model 35, 36, 38. Execution of the instructions by the processor P causes the controller C to receive wavefront aberration data of an eye and express the wavefront aberration data as a collection of Zernike polynomials. The controller C is configured to obtain a plurality of input coefficients based on the collection of Zernike polynomials, which are fed to at least one machine learning model 35, 36, 38 trained to analyze the plurality of input coefficients. The machine learning model 35, 36, 38 generates at least one vision correction coefficient based in part on the plurality of input coefficients.SELECTED DRAWING: Figure 2

The invention discloses an aberration coefficient inversion method and system for a sparse aperture polarization optical system, and belongs to the technical field of sparse aperture optical imaging and polarization optical crossing. The method comprises the following steps: firstly, constructing a sub-aperture Jones matrix model containing wavefront aberration, bidirectional attenuation and phase delay parameters, and carrying out coherent synthesis to obtain a system Jones pupil matrix; generating a real point spread function (PSF) in different polarization and defocus states, and establishing a loss function taking PSF difference as a core; local optimization is avoided through multi-starting-point optimization, and fine optimization is realized by combining a dynamic learning rate and gradient cutting; and finally outputting inversion parameters and evaluating precision. Experimental verification shows that according to the method, the absolute error of inversion parameters reaches 10 <-8 >-10 <-7 > lambda magnitude, the PSF matching degree is high, polarization aberration and co-phase error can be accurately obtained, and support is provided for high-resolution imaging.

The application discloses an air refractive index self-correcting dual-frequency laser interferometer and a wavefront aberration detection method, and solves the problem that for a large-aperture optical system, due to the influence of spatial position on air refractive index, wavefront aberration cannot be accurately measured.The air refractive index self-correcting dual-frequency laser interferometer and the wavefront aberration detection method provided by the application measure the optical path difference between corresponding reference mirrors and mirrors to be measured at each spatial position by using a frequency-doubled laser and a two-frequency-doubled laser respectively, construct an actual correction factor determined only by the wavelengths of the frequency-doubled laser and the two-frequency-doubled laser, and then obtain the wavefront aberration of each spatial position of the mirror to be measured, so that the wavefront aberration detection is self-corrected with respect to air refractive index, the detection precision is higher, the environmental adaptability is stronger, and the use is more convenient.

The design method of the optical-digital collaborative system of a multi-scale convolutional network and a single-plane diffraction element relates to the field of optical system design technology. In order to solve the problems of poor real-time restoration and low restoration accuracy of existing diffraction computational imaging technology, the method includes the following steps: Step 1, designing a single-plane diffraction element; Step 2, constructing a multi-scale convolutional network image restoration module; Step 3, constructing an image restoration loss function. The present invention achieves high-quality color images while achieving extreme simplification of the single-element system. An MSE loss function of the RGB three-channel considering the full-field wavefront aberration and diffraction efficiency weights is constructed. The restoration effect of this design method is improved by 80% compared with the average PSNR of the image before restoration; compared with the traditional PSF deconvolution image restoration algorithm, the average PSNR is improved by 30%, which also provides a new idea for the future miniaturization of optical systems.