56 results about "Optical transfer function" patented technology

The invention discloses a method for realizing a multi-polarization high-numerical aperture Laplace differentiator based on a metasurface, and belongs to the technical field of micro-nano photonics, optical simulation calculation and light field regulation and control. The single-layer metasurface is composed of a cylindrical array which is made of an amorphous silicon material and has a hexagonal lattice period. Geometric parameters of a silicon cylinder are designed and selected, so that the metasurface excites resonance spectrums with large-angle dispersion capability under illumination of p polarized light and s polarized light in the same working wavelength range, and an optical transfer function required by optical Laplacian differential operation with broadband and high numerical aperture is realized in a real airspace; and Laplacian operation can be executed under non-polarized light and non-coherent light conditions. And generating a processing file of the corresponding metasurface according to the determined geometric dimension of the silicon cylinder unit. And processing the dielectric metasurface by adopting a micro-nano processing technology of electron beam etching. In a working wave band, the metasurface can directly obtain two-dimensional second-order edge contour information of a target image under various illumination conditions.

An image processing apparatus comprises a receiver (401) receiving an image comprising first pixel brightnesses encoded in accordance with a perceptually uniform Electrical to Optical Transfer Function, EOTF. A converter converts this to second pixel brightnesses encoded in accordance with an EOTF representing a logarithmic mapping from optical light values to the second pixel brightnesses and an image processor circuit (411) applies a brightness adjustment processing to the second pixel brightnesses. The converter (410) comprises a first converter (601, 605) generating intermediate pixel brightnesses applying a logarithm function to the first pixel brightnesses A second converter (603) generates intermediate pixel brightnesses by applying a second logarithm function to an output value of the perceptually uniform EOTF for the first pixel brightness divided by a divisor equal to the first pixel brightnesses raised to a power of an exponent having a value exceeding 1. A combiner generates the second pixel brightnesses by combining the intermediate pixel brightnesses.

The invention relates to a method for determining the assembly of manufactured individual lenses in order to form an optical lens. The method comprises a step of obtaining measurement data representing or defining a geometry of at least one of the two faces of each manufactured individual lens Lri. The measurement data has an accuracy of 0.5 μm or less. The method comprises a step of determining, from the measurement data, a value of an optimal angle of rotation of the manufactured lenses for which an optical transfer function (OTF) is the maximum or is greater than a threshold value and / or an optimal spacing between the manufactured lenses for which the OTF is the maximum or is greater than a threshold value.

This invention relates to a method for characterizing an optical lens, the method comprising the steps of: measuring the optical transfer function (OTF) of an optical objective lens for at least one of the following illumination types: green light, blue light, and red light; and, for at least one of the illumination types: comparing the measured OTF with at least one predetermined threshold OTF to determine whether the optical quality of the lens is satisfactory. The invention also relates to a system for implementing this characterization method for characterizing optical objectives, and a method and system for manufacturing optical objectives for implementing this characterization method and system.

The present disclosure relates to systems and methods for transmitting standard dynamic range (SDR) content. The system and method may use a modified electro-optic transfer function (EOTF) curve to convert a non-linear color value of the SDR content to an optical output value of the modified SDR content. The system and method may encode the modified SDR content using 8 bits while preventing banding. The system and method may transmit the encoded data to a client device for presentation on a display.

The application provides a motion platform spectrum and motion data synchronous acquisition method, and belongs to the technical field of motion platform spectrum and motion data synchronous acquisition.The main station controller broadcasts a synchronous clock signal to a motion control unit and a spectrometer through an EtherCAT bus, the motion control unit synchronously acquires the speed, the angle of a double-axis tilt angle platform and the detection distance, the spectrometer synchronously acquires the spectrum data of a sample surface, the optical transfer function deconvolution motion blur spectrum restoration algorithm is used to eliminate the spectrum blur caused by motion, the sparse motion spectrum joint reconstruction algorithm based on compressed sensing is started to complete the missing data when the motion state data is locally missing, the spatio-temporal heterogeneous cross-modal fusion model is input again, the physical layer deep synchronous fusion of the spectrum data and the motion state data is realized, and the technical problem that the motion platform spectrum acquisition and the motion state data cannot realize the physical layer deep synchronous fusion is solved.

The application discloses a kind of non-coherent full-color polarized edge imaging system and method based on reverse design photonic crystal, belong to optical imaging and computational optics technical field.System includes non-coherent light source module, polarization-dependent photonic crystal (PDPC) device, imaging detection module and image processing module;PDPC device is made of different all-dielectric material stack, with each layer thickness as trainable parameter, iteration optimization by gradient descent optimization algorithm, with ReLU function constraint lower limit of thickness, obtain optimal structure.Method by collecting orthogonal linear polarization state intermediate image, by spatial difference decomposition, using polarization difference optical transfer function satisfying first-order spatial differential condition, output edge enhancement image containing full color and polarization information.The application does not need coherent light source, it is stable in 400-700nm visible light band Work, high imaging efficiency, contrast ratio is optimal, provide feasible scheme for large-aperture broadband optical simulation processing.

To reduce processing time in a method for estimating a Fried length.SOLUTION: Provided is a method for estimating a Fried length from a motion image including a plurality of frames, comprising the steps of: acquiring first information by averaging the plurality of frames S101; acquiring second information by Fourier transforming the first information S102; acquiring third information by squaring the second information S103; acquiring fourth information by differentiating the third information twice with respect to frequency S104; and estimating the Fried length based on the third information, the fourth information, and an optical transfer function S106.SELECTED DRAWING: Figure 1

The invention provides a photoetching device preparation method for inhibiting a mask three-dimensional effect. The photoetching device preparation method can be applied to the technical field of integrated circuit manufacturing and photoetching. The preparation method of the photoetching device for inhibiting the three-dimensional effect of the mask comprises the steps that a plurality of candidate metal-medium multilayer film structures are constructed based on preset configuration parameters, and metal layer materials in different candidate metal-medium multilayer film structures are different; acquiring optical transfer functions corresponding to the plurality of candidate metal-medium multilayer film structures; screening out a target metal-medium multilayer film structure supporting a single high-order diffraction order dominant imaging mode from the plurality of candidate metal-medium multilayer film structures according to response characteristics of each optical transfer function in a spatial frequency domain; and preparing the photoetching device based on the target metal-medium multilayer film structure. The invention also provides a photoetching device for inhibiting the three-dimensional effect of the mask.

The application discloses a FRET sensitized channel super-resolution SIM image reconstruction parameter estimation method and system. The method comprises the following steps: obtaining a FRET three-channel original image data set and an optical transfer function OTF after structure light modulation; obtaining a FRET three-channel spread spectrum image by using Fourier transform and spectrum shift, and obtaining reconstruction parameters of DD, DA and AA channel image sets from the FRET three-channel spread spectrum image; replacing the structure light illumination frequency vector of the DA channel with the structure light illumination frequency vector in the reconstruction parameters of the DD channel image set; obtaining the initial phase and modulation depth of the DA channel image set by using a complex linear regression algorithm containing empirical mode decomposition; performing FRET three-channel structure light super-resolution linear Wiener reconstruction, and performing data processing based on a channel sensitization intensity measurement method to measure the FRET efficiency and the donor-acceptor concentration ratio of the FRET super-resolution image. The application enhances the robustness of the SIM-FRET method for low signal-to-noise ratio image reconstruction, and expands the usability of the SIM-FRET under extremely low FRET efficiency.

The invention relates to a method for obtaining an image stack from a plurality of input images (IE), each input image depending on a respective original image (IB) representing the same scene (3) and each original image being acquired by a sensor (14) of a camera module (4) through an optical system (12) for a respective focus distance, the method being implemented by a computer, and for each input image, the method comprises the steps of: determining (26) at least one optical transfer function between the scene and the sensor for a focus distance corresponding to the respective original image; and calculating (28), for each determined optical transfer function, a corrected image (IC) by deconvolution of the input image using the optical transfer function to obtain a set of corrected images, the obtained image stack depending on the set of corrected images.

The present application relates to the technical field of visual detection, and discloses a visual detection method and system for injection molding and bottle blowing based on quality online monitoring, which comprises the following steps: constructing a cylindrical coordinate system of a bottle body and a virtual anchor point array, obtaining a virtual anchor point reference position data set, constructing a matching template, obtaining a displacement vector set and a grid defect map; selecting a target area in the grid defect map, establishing an optical transfer function matrix and combining abnormal pixel distribution data to obtain a phase difference set and three-dimensional feature data of defects; establishing a multi-dimensional research and judgment model based on the three-dimensional feature data of defects, obtaining a key parameter set, and formulating a data detection method containing a rejection system and a self-protection system. The present application realizes adaptive identification of defects, accurate rejection of unqualified products and self-protection of equipment, and improves the real-time detection and production line efficiency. The present application solves the problems of fixed area not adapting to dynamic deformation of the bottle body, misjudgment caused by light interference and large rejection deviation in traditional detection.

The invention relates to a method (200) for determining relative lateral data of features of a semiconductor substrate, the method (200) being implemented by a device comprising: - an imaging system (11, 13, 14, 16) having a depth of field, - a spatial phase mask (17) positioned in the aperture stop of the imaging system or in a conjugate plane of the aperture stop and configured to modulate the optical transfer function of the imaging system, and - an image sensor (12), wherein the modulated optical transfer function is adapted to extend the depth of field of the imaging system, the method (200) comprising the following steps: - acquiring (202) an image of a scene comprising at least a first feature of the semiconductor substrate in a first plane and a second feature of the semiconductor substrate in a second plane, the planes being perpendicular to an optical axis of the imaging system and separated by a distance greater than the depth of field of the imaging system; - detecting (204) the first feature of the semiconductor substrate and the second feature of the semiconductor substrate; - determining (206) relative lateral data of the first feature and the second feature. The invention also relates to a device implementing such a method.

The application discloses a kind of patch mirror translation error correction methods for extended target, belong to optical imaging technical field.The method for realizing of the present application is: for the optical system of the block type primary mirror of having one piece reference mirror and one piece mirror to be adjusted, to any extended target imaging;Establish the relationship between the reciprocal of the power spectral density of image at the secondary peak position of optical transfer function under wideband spectrum illumination and the translation error of mirror to be adjusted, solve the translation error of mirror to be adjusted using the relationship;Adjust the translation of mirror to be adjusted;Repeat the process of calculating the translation error of mirror to be adjusted until the translation of mirror to be adjusted meets the threshold requirement;For the block type primary mirror optical system containing multiple mirrors, adjust the translation of mirror one by one in turn until all mirrors are adjusted, and the translation error correction is complete.The present application has the advantages of large dynamic range, few iteration times and fast convergence speed, and is suitable for on-orbit translation error correction of telescope with block type primary mirror.

1. The name of the design product: optical transfer function detection device. 2. The use of the design product: the device mainly used for detecting optical transfer function. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

The present disclosure relates to systems and methods for transmitting standard dynamic range (SDR) content. The system and method may use a modified electro-optic transfer function (EOTF) curve to convert a non-linear color value of the SDR content to an optical output value of the modified SDR content. The system and method may encode the modified SDR content using 8 bits while preventing banding. The system and method may transmit the encoded data to a client device for presentation on a display.

This invention belongs to the technical field of surface morphology measurement, and discloses a method and apparatus for measuring morphology based on pixel-by-pixel high dynamic structured illumination. The method includes: S1: calibrating the DMD and camera to obtain the grayscale response relationship and coordinate mapping relationship between the DMD and the camera; S2: correcting the phase-shifting fringes generated by the DMD using the grayscale response relationship, coordinate mapping relationship, and optical transfer function; S3: projecting the corrected phase-shifting fringes onto the sample surface and acquiring a phase-shifted structured illumination image by the camera; S4: performing slicing imaging on the phase-shifted structured illumination image to extract the three-dimensional morphology of the sample surface. This application can improve the imaging quality of the camera pixel by pixel, and then obtain the three-dimensional morphology of the sample surface by optical slicing multiple high-quality structured illumination images.

A display apparatus and a control method thereof are disclosed. The display apparatus includes a memory storing one or more instructions and a processor configured to execute the stored one or more instructions to obtain encoding data of a first digital image and artificial intelligence (AI) meta information indicating a specification of a deep neural network (DNN), obtain a second digital image corresponding to the first digital image by decoding the encoding data, obtain an optical signal converted from the second digital image according to a previously determined electro-optical transfer function (EOTF), and obtain a display signal by processing the optical signal using an optical-optical transfer function (OOTF) and a high dynamic range (HDR) DNN set according to the AI meta information.

The application discloses a wide-spectrum lens for ultraviolet to visible light bands, which comprises first to eighth lenses arranged in sequence along the light path propagation direction, wherein the first and second lenses are glued together to form a glued lens, and the fifth and sixth lenses are glued together to form a glued lens; the third lens is a negative double-concave thick lens; the first, fourth, fifth and seventh lenses are double-convex positive lenses; and the second, sixth and eighth lenses are negative double-concave thin lenses. The wide-spectrum chromatic aberration, on-axis and off-axis aberration of the lens are well balanced, the optical transfer function of the system is improved, the imaging quality is high, and the actual use requirements of the wide-spectrum imaging from ultraviolet to visible light are met.

The application provides an image processing method and device for a microscope under arbitrary phase modulation. An amplitude mask is configured in a microscopic imaging system. A first intensity image of a sample collected by the microscopic imaging system is obtained. After a phase optical transfer function of the system is obtained, effective transfer functions composed of a plurality of preset phase values and the phase optical transfer function are used to pre-process the first intensity image and perform deconvolution operation. While obtaining a target image of the sample with high contrast and resolution, a target phase shift introduced by the system configuring the amplitude mask is determined and stored in association with the system. The target phase shift can be directly called to perform deconvolution operation on other intensity images collected by the same microscopic imaging system, and to reconstruct phase information or refractive index information of the sample. The image processing efficiency is improved, and the image processing method and device are low in cost and easy to implement.

The embodiment of the invention provides an optical imaging method and system, and the method comprises the steps: obtaining the number of non-zero elements of an imaging object; obtaining the number of non-zero elements of an optical transfer function of the optical system; determining sparsity of the imaging object based on the number of non-zero elements of the imaging object and the number of non-zero elements of the optical transfer function; obtaining an observation image of the imaging object in the optical system; generating a target image of the imaging object based on the sparsity of the imaging object and the observation image; the resolution of the target image is greater than that of the observation image.

The invention relates to a characterisation method (100) for characterising one or more optical lenses, the method comprising the following steps carried out for at least one optical lens (OO): - measuring (102) an optical transfer function, FTO, referred to as the test FTO, at a plurality of measurement points defined by a test plane; and - identifying (106), from among a plurality of clusters, a cluster, referred to as the target cluster, to which the lens belongs; - providing (110), for the optical lens (OO) and on the basis of the target cluster, a calibration profile for correcting an image captured with the optical lens. The invention also relates to a characterisation system for characterising an optical lens implementing such a characterisation method, and to a method and system for manufacturing an optical lens implementing such a characterisation method and system.

The application discloses a CUDA-based deconvolution image restoration method, and has the characteristics that fixed shared memory is allocated in a host, Device memory is allocated in a graphics processor, and collected original image data is stored in the fixed shared memory and the Device memory; the cut-off frequency radius of the original image is calculated; the required Block thread block number is designed; according to the cut-off frequency radius, an imaging system optical transfer function template is generated, and after Fourier transform, the optical transfer function template is stored in the Device memory; Fourier transform is performed on original image data to be deconvoluted, according to the Block thread block number obtained above and the optical transfer function template after Fourier transform, deconvolution processing calculation is performed on the original image data after Fourier transform, and finally, a restored image is obtained, and the advantage is that compared with traditional deconvolution processing, the processing time is greatly shortened under the same number of convolutions.

This invention discloses a super-resolution microscopic imaging method based on multi-channel modulation and demodulation. First, this invention utilizes the synergistic effect of a spatial light modulator and an electro-optic deflector to generate multiple hollow illumination spot arrays. Second, during the scanning of the target sample, fluorescence signals are acquired for the illumination area of ​​each hollow illumination spot, corresponding one-to-one with the multi-channel hollow illumination spot array according to the sampling time sequence. Then, pixel-level signal redistribution processing is performed on the acquired multi-channel images. The redistributed image stack is divided into at least three regions, and corresponding weighting coefficients are applied to the signals of different regions for linear or nonlinear combination. Finally, an inverse Fourier transform is performed on the weighted combined image to obtain the super-resolution image. This invention can extend the support domain of the optical transfer function, achieving a resolution superior to traditional confocal and single-point hollow excitation and detection methods.

Disclosed are dynamic system optical-to-optical transfer functions (OOTF), which adapt displayed content to provide a so-called “perceptual reference” effect for the viewer, wherein, as the current viewing conditions depart from a “reference” viewing scenario, the dynamic system OOTF adapts the content and / or display to provide the viewer with as close as possible to the perceptual effect of the “reference” viewing scenario. The dynamic system OOTF may perform one or more of the following adaptation processes: adapting media content from a source color space to a linear XYZ color space; adapting media content from a linear XYZ color space to a display device's color space; automatically adjusting display device brightness, white point, and / or black point; adapting media content from an intended viewing environment to a common compositing space's fixed viewing environment; and / or adapting media content from the common compositing space's fixed viewing environment to that of the viewer's current viewing conditions.

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.

The invention discloses a terahertz metasurface polarization coding encryption method based on angular spectrum modulation, and belongs to the technical field of information encryption. In the encryption method, to-be-encrypted information is mapped to an optical transfer function of a metasurface, so that an angular spectrum of an input plaintext image is modulated under specific linearly polarized light, and then a ciphertext image is generated through inverse Fourier transform. During decryption, Fourier transform is carried out on a ciphertext image obtained under a correct polarization condition, and information is recovered through angular spectrum difference analysis. According to the method, an optical 4f system can be used as a framework, a terahertz metasurface composed of rotating rectangular hole structure units is used as an angular spectrum modulator, and 2-bit information coding is achieved through different arrangement strategies of the metasurface. According to the method, a direct mapping strategy is adopted, the method does not need to depend on a complex iterative optimization algorithm like traditional metasurface holography, the design process is simplified, decoupling of encrypted data and physical hardware is achieved, and system flexibility and digital compatibility are improved. Meanwhile, the method is combined with a specific polarization observation and coding mechanism, so that the information security is further enhanced. The invention provides an effective solution for information encryption and anti-counterfeiting of the terahertz wave band.

The application is a large field telescope deformable mirror surface type control method, comprising: (1) determining the actuator arrangement matrix M according to the arrangement of the deformable mirror actuator; (2) measuring the on-axis field optical transfer function matrix W corresponding to the deformable mirror in the system; (3) calling the pupil shape matrix P of the field according to the field coordinate Φ Φ ; (4) screening the effective actuator M Φ of the deformable mirror under the field M Φ =P ; (5) calculating the effective transfer function W Φ of the deformable mirror in the field according to the effective actuator W Φ =M ; (6) calculating the voltage value of each actuator according to the input deformable mirror surface type Ψ Φ , generating the control voltage vector (7) limiting the voltage of the edge actuator, calculating the final control voltage vector V' Φ =V Φ ×F; (8) outputting the voltage vector and loading to the deformable mirror, completing the closed-loop control of the deformable mirror.

The present application provides a kind of shear amount self-adapting regulation method and system of shear speckle interferometry, it is related to speckle interferometry field, including the following steps: according to the number in the optical transfer function of shear device and the phase difference jump point on the 1st fringe order in the phase difference distribution diagram of shear device, determine shear interference fringe jump point number threshold range;Realize the automatic quantitative analysis and judgment of the information of dense and sparse stripes in the phase difference distribution diagram of shear interference, and then guide the adaptive adjustment of shear amount in the strain measurement process, solve the problem of reducing the strain measurement accuracy caused by improper selection of shear amount parameter in the existing laser shear speckle interferometry technology, and the whole regulation process does not need human intervention, can realize the automatic, efficient and accurate regulation of shear amount.

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.