14 results about "Point spread" patented technology

This application discloses a design method for an optoelectronic imaging system with laser protection and privacy protection functions, relating to the field of optoelectronic imaging. The method includes: determining an optimized point spread function based on preset point spread distribution characteristics, target energy divergence, and point spread radius using an optical-algorithm joint optimization framework; determining an initial phase distribution based on imaging parameters using the Gerchberg-Saxton algorithm; adjusting the initial phase distribution using a stochastic gradient descent algorithm, guided by the difference in energy divergence of the point spread function, to determine the optimized phase distribution corresponding to the optimized point spread function; and using the optimized phase distribution to load the phase modulation component of the optoelectronic imaging system. This application can achieve high-quality optoelectronic imaging with laser protection and privacy protection capabilities.

The invention provides an ultrathin diffraction prescription lens acceptance report output method and system, a storage medium and equipment applied to the field of lens manufacturing and quality acceptance, and the method comprises the steps: building a cross-wavelength and cross-field image quality evaluation model through defining a field-of-view sampling point set; and calculating or measuring a point spread function, a modulation transfer function, distortion and stray light and ghost image budget indexes, and feeding back measurement data such as manufacturing tolerance, residual layer difference and warping to an optimizer, thereby realizing closed-loop consistency of the whole process of'design-manufacturing-measurement-acceptance '. The system can output an acceptance report containing failure reason code mapping, threshold version information, an original data hash abstract and a digital signature, and provides support for gating decision and traceable auditing in the mass production process. According to the scheme, through the closed-loop mechanism, the consistency and traceable gating of all links of design, manufacturing, metering and acceptance are ensured.

The invention relates to the technical field of lenses, and discloses an annular point diffusion lens based on an energy distribution model, which comprises a lens substrate, a central clear area and an annular point diffusion structure area, and is characterized in that the annular point diffusion structure area is composed of a first annular point diffusion structure area, a second annular point diffusion structure area and a third annular point diffusion structure area, the first annular point diffusion structure area, the second annular point diffusion structure area and the third annular point diffusion structure area are distributed in a concentric annular mode from inside to outside with the central clear area as the center and are all borne on the lens base material, the central clear area is not provided with a micro-lens structure, and the annular point diffusion structure areas are designed in a gradient mode through micro-lens parameters. A defocusing signal conforming to an energy distribution model is directly generated, peripheral quantitative defocusing is achieved, the first annular point diffusion structure region generates a weak defocusing signal, the second annular point diffusion structure region generates a middle defocusing signal, and the third annular point diffusion structure region generates a strong defocusing signal.

This improves the practicality of depth estimation of subjects using encoded imaging. [Solution] In an imaging device that performs encoded imaging, the processor performs the following processes: storing the captured image in memory; decoding the captured image based on the point spread function (PSF) of the imaging system for multiple PSFs with different point light source depths, and storing multiple decoded images in memory; evaluation value calculation process applying an evaluation function to each partial image region of the multiple decoded images and storing multiple evaluation values ​​in memory; and calculation using memory based on the multiple evaluation values ​​to determine the depth estimate of the subject portion corresponding to each partial image region of the captured image. When the processor performs the decoding image generation process and the evaluation value calculation process, it first performs processing for a first group of point spread functions, then performs processing for a second group of point spread functions, and determines the final depth estimate for each subject portion based on the results of these executions.

The utility model discloses a point diffusion out-of-focus multi-effect lens, and relates to the technical field of vision prevention and control lenses. The point diffusion out-of-focus multi-effect lens is provided with the central optical area, the out-of-focus area and the light diffusion area, the out-of-focus area is located on the periphery of the central optical area, the light diffusion area comprises the diffusion point array to change light scattering so as to adjust the contrast ratio, the point diffusion area is matched with the out-of-focus area, and the vision delay effect is better; meanwhile, a plurality of out-of-focus rings are arranged to construct a plurality of out-of-focus areas, a microstructure array of the out-of-focus areas is arranged in a radial array mode, a structure with dense middle out-of-focus structures and sparse out-of-focus structures is formed, the physiological structure of human eyes is met, vision impediment is reduced, and the astigmatism problem of a wearer is solved; moreover, the out-of-focus zones in the adjacent out-of-focus annular zones are staggered in the circumferential direction, and the intervals between the out-of-focus zones in the adjacent out-of-focus annular zones are also staggered in the circumferential direction, so that the anisotropy of the out-of-focus zones is increased, the adaptation of a visual receptor is reduced, and the tolerance phenomenon is delayed.

This invention relates to the field of optical element technology, and discloses a scattering and homogenizing element, a design method, and a point diffuser lens. The scattering and homogenizing element includes a microlens array, which includes several sub-lenses. The aperture boundaries of the sub-lenses are made of Thiessen polygons, and the seed point coordinates of the Thiessen polygons are randomly distributed. The geometric center point of any Thiessen polygon is the vertex position of the corresponding sub-lens. This invention can effectively suppress interference speckle caused by regular arrays, improve the uniformity of the light field, and has a better homogenizing effect in terms of irradiance distribution and intensity.

The present application relates to a kind of based on the even distribution solution method of irregular area cluster of force diffusion, based on force model, the number of certain equipment given constitutes cluster, deployment in irregular area on spherical surface, require deployment position as far as possible even, give the even distribution solution method.In the solution method, it is required that irregular area is single connected, when initialization, the point of given number is randomly generated in area, let point spread to even distribution by repulsion diffusion model, when point touches the boundary of area, then slide, at the corner of area, then stationary.This method can also be extended from spherical surface to three-dimensional and above space, be applied to the solution of unstructured grid division and generation, detection, exploration, limited coverage and other problems.

The application discloses a laser triangular displacement signal deconvolution and symmetric reconstruction method and a laser displacement detection device, acquires optical point spread functions of one-dimensional linear array photoelectric detectors in a measuring range of the device at different physical positions, and constructs a space time-varying optical point spread function reference library; a one-dimensional original light intensity signal of a measured surface is collected, corresponding optical point spread functions are called from the reference library after initial positioning of a light spot, iterative deconvolution is performed on the original light intensity signal, termination iteration is determined by a normalized residual change rate and a preset maximum iteration number, and a physical sharpened light spot signal is obtained; signal variance and statistical kurtosis of a main peak local area are calculated, and a dynamic pixel window width is adaptively adjusted; an asymmetric index is calculated in the dynamic pixel window, forced symmetric reconstruction is performed when the asymmetric index is greater than a preset truncation threshold, sub-pixel centroid coordinates are extracted based on a reconstructed symmetric waveform, and an actual displacement value is calculated.

Aspects of the subject disclosure may include, for example, generating a first set of optical signals, demultiplexing the first set of optical signals to generate demultiplexed signals, launching the demultiplexed signals into a medium, receiving from the medium a second set of optical signals, multiplexing at least a portion of the second set of optical signals to generate one or more multiplexed signals, obtaining one or more electrical signals according to one or more measurements of one or more optical fields of the one or more multiplexed signals, and generating one or more point spread functions from the one or more electrical signals. Other embodiments are disclosed.

The invention discloses a super-resolution imaging method and device, a medium and equipment. The method comprises the following steps: based on a point scanning imaging system, at least adopting two point spread functions to carry out fluorescence image acquisition on the same region of interest, and obtaining fluorescence images corresponding to the point spread functions; carrying out denoising processing and deconvolution processing on the basis of each fluorescence image to obtain a super-resolution image; and determining whether the super-resolution image satisfies a predetermined imaging condition, and when determining that the predetermined imaging condition is not satisfied, performing denoising processing and deconvolution processing again based on each fluorescence image to obtain a current super-resolution image until the current super-resolution image satisfies the predetermined imaging condition, and obtaining a target super-resolution image. According to the invention, super-resolution image imaging can be rapidly carried out.

1. The name of the design product: functional lens detector. 2. The use of the design product: for the detection of ordinary lenses, multifocal lenses, point spread lenses, etc. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The invention concerns a method for the provision of transfer functions in the field of light field microscopy, where a sample volume to be imaged is captured using a multitude of partial images (1 bis 12xy) from different angles of capture (Φ) and for which the respective point spread functions (PSF) for the partial images (1 through 12xy) intended for a 3D reconstruction of the sample volume are determined and assigned to the partial images (1 through 12xy).A characteristic is that the partial images (1 through 12xy) are examined for existing symmetries of the optical-technical data they are based on and any found symmetries are captured and stored together with a computation formula. The computation formula makes it possible, starting from a point spread function (PSF) and / or a processed point spread function of a first partial image (1 through 12), to generate corresponding point spread functions (PSF) and / or processed point spread functions of other partial images (2x through 12xy) that are symmetric relative to the first partial image (1 through 12), where the point spread functions (PSF) and the processed point spread functions (PSF), respectively, of the other partial images (2x through 12xy) are only generated if needed and are only stored temporarily. A processed point spread function is obtained by executing at least one mathematical operation on the relevant point spread function. In addition, or alternatively, further symmetric subsets within the transmission function of at least one partial image (1 through 12xy) can be generated based on a first subset of the transmission function of a partial image (1 through 12xy), when and if needed.

The present application relates to the technical field of image processing, in particular to a kind of image enhancement method and wide field fluorescence imaging system, comprising: on the image plane of wide field fluorescence microscope, fluorescent microspheres are arranged, and wide field fluorescence microscope is used to collect microsphere image to fluorescent microspheres;Using computer equipment to process microsphere image to obtain the full width at half maximum value of fluorescent microspheres;In computer equipment, point spread model is constructed based on the full width at half maximum value;Using wide field fluorescence microscope to collect sample image, then using computer equipment to process sample image based on point spread model to obtain enhanced image.The beneficial effect is that: by detecting the full width at half maximum value of fluorescent microspheres, and being used to the construction process of point spread model, so that better imaging effect is realized while simplifying the processing process, improves processing efficiency.

The utility model relates to the technical field of myopia management, in particular to a point diffusion out-of-focus contact lens, which comprises a soft lens provided with a central optical zone with the diameter of 2.5 mm-3. 0mm; the multi-ring defocus area surrounds the central optical area, the diameter of the multi-ring defocus area is 3.0 mm-8. 0mm, the multi-ring defocus area comprises six concentric circle treatment areas with the same width, and each concentric circle treatment area has positive additional diopter of + 3.00 D. According to the utility model, a double myopia management mechanism is adopted, the multi-ring defocus area provides stable peripheral myopic defocus and inhibits eye axis growth, and the myopia effect is improved. The micro dot matrix area reduces the retina contrast, reduces wrong visual signal transmission and delays the myopia progress, the arranged central optics ensures clear vision, the micro dot matrix design reduces glare, improves the comfort level, can adjust the micro density, size and defocusing amount, is adaptive to different diopters and contrast sensitivity requirements, and also has clinical effectiveness; by combining optical defocus and contrast theories, the multi-focal soft lens has a better myopia control effect compared with a traditional multi-focal soft lens.