540 results about "Lens array" patented technology

A device for light field microscopy, comprising: a two-dimensionally spatially resolving detector for detecting light radiated by a sample; a detection beam path having at least one microscope objective lens; and at least one multi-lens array for imaging the light radiated by the sample onto the detector, wherein the multi-lens array is arranged in a plane which is optically conjugated with respect to a rear focal plane of the microscope objective lens, or in the vicinity of such a plane; and a control and evaluation unit for activating the detector and for evaluating the measurement data from the detector. The device also includes an adjustable relay optical system in order to image the rear focal plane of the microscope objective lens into the plane in which the multi-lens array is arranged, or in the vicinity of this plane. A method for light field microscopy is also provided.

The invention provides a micro-lens array multi-point alignment focusing method, a storage medium and electronic equipment, and relates to the technical field of lens array detection. According to the algorithm, three unit lens point positions which are far away from each other on an actual array lens sample piece are selected as reference input points, after reference coordinates and actual coordinates are obtained, a vector length scaling coefficient, xy-direction offset and a rotation angle are calculated in sequence, then a conversion matrix is obtained through plane fitting, and the conversion matrix is calculated. And finally, accurate alignment and focusing of any reference point and an actual product point in the xyz three directions are realized. The method does not need to consider the rotation direction and the deviation angle of sample placement, is high in adjacent point test positioning and movement completion speed, has the characteristics of high precision, simplicity in implementation, low cost and the like, and effectively solves the problems of low lens positioning and focusing efficiency, insufficient precision, complex calculation and the like of a traditional micro lens array unit. The micro-lens array is suitable for various application scenes depending on the micro-lens array, such as optical sensing, 3D imaging and the like.

The invention relates to the field of human body measurement automation, and discloses an automatic skeleton point recognition method and system for a digital human, and the method comprises the steps: firstly recognizing an RGB lens array corresponding to the digital human in a target scene, collecting an omnibearing image, and carrying out the three-dimensional reconstruction to generate image point cloud data; then noise points are detected, filtering parameters are analyzed, noise is reduced, and an optimized point cloud model is constructed; then multi-angle human body images are collected, and joint points are recognized to generate two-dimensional skeleton data; then determining a mapping relation of the two-dimensional skeleton in a three-dimensional space, converting the two-dimensional skeleton into a three-dimensional joint coordinate set, positioning an attitude registration point of the SMPL model and matching a skeleton topological structure; and finally, determining a size measurement value based on the topological structure, and generating an automatic identification result after calibration. According to the invention, the recognition accuracy, efficiency and automation degree of the digital human skeleton points can be improved.

The utility model provides a laser ablation device which comprises a first laser light source used for emitting treatment laser; the optical splitter is arranged at the output end of the first laser light source and is used for splitting the treatment laser into multiple paths of split laser; wherein the branch lasers are arranged in rows and columns; the optical modulator is arranged at the output end of the optical splitter and is used for performing independent power regulation and control on each branch laser; the optical fiber coupler is arranged at the output end of the optical modulator and is used for coupling the branch lasers into the optical fiber branches of the optical fiber array one by one; the optical fiber array is connected between the optical fiber coupler and the focusing micro-lens array, and each optical fiber branch corresponds to one focusing micro-lens of the focusing micro-lens array; and the focusing microlens array is used for focusing the split laser onto the diseased tissue in space through focusing microlenses for ablation treatment. The technical scheme can be used for ablation treatment of various irregular pathological tissues, and damage to surrounding healthy tissues is avoided.

The invention relates to an LD area array beam shaping and homogenizing system based on a microlens array and a use method thereof. The system comprises an LD area array light source, a fast axis pre-correction unit, a two-dimensional shaping and homogenizing unit, a relay lens group and an output coupling unit which are sequentially arranged along a light path, the fast axis pre-correction unit is a single-row micro-cylindrical lens array composed of a plurality of micro-cylindrical lenses; the two-dimensional shaping and homogenizing unit comprises a first microlens array and a second microlens array which are sequentially arranged along the optical axis, and the first microlens array and the second microlens array are both positive spherical microlens arrays arranged in an N * N matrix. According to the LD area array light beam shaping and homogenizing system, light beam segmentation and superposition are achieved, eventually homogenization of output light spots is achieved, and the light spot uniformity reaches 90% or above.

Provided is an image sensor including a sensor substrate including a first photosensitive cell and a second photosensitive cell which are configured to sense light incident on the sensor substrate, a color separating lens array configured to change a phase of first wavelength light and a phase of second wavelength light such that the first wavelength light travels to the first photosensitive cell and the second wavelength light travels to the second photosensitive cell, and a spectrum shaping layer including a plurality of nanostructures respectively having a first refractive index, and a dielectric material provided between the plurality of nanostructures and having a second refractive index, the spectrum shaping layer being provided between the sensor substrate and the color separating lens array and configured to shape a spectral profile of the light incident on the sensor substrate by reflecting and / or absorbing portion of light passing through the color separating lens array.

The invention provides an illumination system and projection equipment. The lighting system comprises a light source module, a wavelength conversion device, a first light guide assembly, a second light guide assembly and a micro-lens array module. The light source module is used for providing a plurality of green and blue laser beams. The wavelength conversion device is used for generating fluorescent light beams. The first light guiding assembly and the second light guiding assembly are used for guiding a fluorescent light beam and a green laser light beam respectively. The fluorescent light beams form fluorescent light spots on the first area of the first side face of the micro-lens array module. The plurality of green laser beams form a plurality of green light spots on a second area of the first side surface of the micro-lens array module. The first region is adjacent to the second region. The illumination system and the projection equipment provided by the invention avoid energy loss and have good light uniformity.

The invention is suitable for the technical field of diffractive optics, and provides a self-adaptive chromatography grating dispersion correction method and system based on deep learning, and the method comprises the following steps: enabling an incident light beam to be diffracted through a chromatography grating, and obtaining a multi-stage chromatography diffraction light beam; dispersion angle compensation is carried out on the multi-stage diffraction beams through the plane straight stripe blazed grating; collimating the corrected light beam by using a double-barrel lens group and forming an image space telecentric light path to obtain an image space telecentric light beam; performing spectral beam splitting and aberration pre-correction on an image space telecentric beam through a micro-lens array, and then performing image acquisition to obtain a pre-corrected multi-spectral image; and based on a deep learning algorithm, carrying out real-time fusion processing on the pre-corrected multispectral image, dynamically adjusting the deflection angle of the microlens array, and outputting a chromatic dispersion corrected tomographic microscopic image. According to the method, the axial color difference and the transverse color difference of the chromatography system can be remarkably reduced, and the method is particularly suitable for application scenes needing wide spectrum coverage and high signal-to-noise ratio.

According to the living cell observation device, the observation system and the observation method, a light beam generated by an illumination element arranged below a living cell is incident to a pyramid lens array module located above the living cell, the pyramid lens array module reflects the incident light beam at the same direction angle, and the reflected light beam is diffracted into direct light and diffracted light when passing through the living cell; the phase plate causes the direct light and the diffracted light to generate a phase difference, and the direct light and the diffracted light having the phase difference interfere with each other on the imaging element to generate a phase difference image of the living cells. The volume of the observation device is greatly reduced, especially the reduction in the height direction enables the observation device to be easily placed in an existing culture box, real-time and full-life-cycle observation of cells is realized, meanwhile, the pollution of the cells and the change of a culture environment are avoided, and the observation efficiency is improved. The advantages of a current phase difference type microscopic observation system in the aspect of image effects are reserved, and the requirements for precision and stability of a movement mechanism are lowered.

A CMOS image sensor includes a unit pixel array including a photodiode array, a color filter array, a micro-lens array, and a grid isolation structure laterally separating adjacent color filters. The grid isolation structure includes a first low-n grid, a second low-n grid underlying the first low-n grid, and a metal grid within the second low-n grid, the first low-n grid being narrower than the second low-n grid. The color filter array includes color filter matrixes, all color filter matrixes have the same arrangement pattern. Sizes of color filters in each color filter matrix vary depending on locations of the color filters in the color filter matrix. In an edge portion, a distance between a center of a color filter matrix and a center of a corresponding unit pixel matrix in plan view varies depending on a location of the unit pixel matrix in the CMOS image sensor.

The invention belongs to the technical field of femtosecond laser processing, and particularly relates to a femtosecond laser-based surface bulging out-of-focus lens processing method, which is used for processing a micro-lens array with the out-of-focus amount continuously changing from the eye side to the temporal side based on a plurality of bulging units. The cavity structure is machined below the bulging unit based on multiple laser control, the cavity structure provides a preset transformation foundation for subsequent secondary machining, the bulging unit is conveniently converted into a micropore structure, and after conversion is completed, the light transmittance does not obviously change. Under the condition that the light transmittance meets the requirement, the vision correction defocus lens which better meets the requirement for the real defocus amount of the retina and can prolong the service cycle after secondary processing is achieved.

The HMD comprises a head-mountable frame and an optical projection assembly supported by the frame. The optical projection assembly comprises a microdisplay supported by the frame. The microdisplay has a two-dimensional array of pixels. Each pixel contains a group of emitters configured to emit image light. The microdisplay further comprises a projection optical system configured to receive image light from each group of emitters in the array of pixels at the entrance pupil and project the focused image light from the exit pupil. The microdisplay further comprises a two-dimensional array of optical collimators positioned between the microdisplay and the projection optical system. The steerable optical collimators are further configured to redirect the emission profiles of the corresponding groups of emitters toward the center of the entrance pupil of the projection optical system.

An optical coupling component (10) optically couples a plurality of optical fibers (61) and a photonic integrated circuit (7). The optical coupling component (10) comprises the plurality of optical fibers (61), an optical fiber holding component (4) which holds the plurality of optical fibers (61), and a lens array (5) which has a plurality of mirror lenses (53). The plurality of mirror lenses (53) each change the angle of an optical path between each of the plurality of optical fibers (61) and the photonic integrated circuit (7). The lens array (5) has a space structure in which a portion of the optical path from entry into to exit from the lens array (5) passes through the air. The optical fiber holding component (4) and the lens array (5) are formed independently from each other and are directly or indirectly connected to each other.

This invention provides a photomask-based light projector, depth camera, and item picking system, comprising: a light source for projecting a linear laser array; a microlens array disposed on the light-emitting side of the light source for receiving the linear laser array and homogenizing it into a surface light; and a photomask, including a pre-set pattern structure disposed on the light-emitting side of the microlens array for receiving the surface light and projecting a structured light pattern according to the pattern structure. In this invention, a rotating mirror drives the rotation of multiple light-reflecting surfaces to reflect the linear laser projected by the light source onto the microlens array to form a linear laser array. The microlens array then homogenizes the linear laser array into a surface light, which is then projected into a structured light pattern through the photomask. This not only significantly improves the light projection power compared to VCSEL-based structured light technology but also provides a significantly denser light spot compared to galvanometer scanning devices, thereby improving the resolution of the depth camera.

The application discloses a display device and method, a computer readable storage medium and a computer device, wherein the display device of an embodiment comprises: an image collector, which outputs a user position to a control unit according to a real-time collected user image; a variable-focus lens array, which is arranged on the light-emitting side of a second display panel and is away from the user relative to a first display panel, and the focal length of each lens is variable; and the control unit is configured to obtain display parameters according to the user position, wherein the display parameters comprise: a focal length parameter output to the variable-focus lens array to control the focal length of each lens, and an image parameter output to an image rendering unit, which is used to make the first display panel display a first display image and make the second display panel display a second display image, so that the display device presents a three-dimensional image. The display device provided by the embodiment of the application increases the depth of field range and the viewing angle of the three-dimensional image display by arranging the first display panel, the variable-focus lens array and the second display panel.

The invention discloses a device and a method for synchronously detecting the focal length and the surface topography of a micro-lens array, which can realize synchronous detection on the focal length and the surface topography of the micro-lens array through a set of system, realize mutual matching between two parts of results and greatly shorten the detection time. The device comprises a first monochromatic laser light source (1), a first collimating lens (2), an attenuation sheet (3), a reflector (4), a microlens array sample (5), a microscope objective (6), a barrel lens (7), a first quarter-wave plate (8), an area array detector (9), a first monochromatic optical filter (10), a second monochromatic laser light source (11), a second collimating lens (12), a linear polarizer (13), a beam splitter prism (14), a polarization beam splitter prism (15), a second quarter-wave plate (16) and a reference lens (17). A third quarter-wave plate (18), a second monochromatic optical filter (19) and a polarization camera (20).

A quantum-dot light conversion film, a preparation method and an application thereof and an anti-ultraviolet blue-free yellow light for chip manufacturing are provided. The preparation method includes: (1) mixing a quantum-dot concentrate with an acrylic monomer, then adding high polymer for secondary mixing, to obtain a polymer; (2) after mixing the polymer and nanoparticles, adding additives for dispersion to obtain a light conversion liquid resin; and (3) coating and curing the light conversion liquid resin to obtain a quantum-dot light conversion film. The light conversion film has high light conversion efficiency, adjustable emission peak position and narrow half peak width. Its surface forms a tightly arranged high refractive index microlens structure. When the light reaches the microlens array, as the light output surface is a lens structure and the refractive index is improved, more light is emitted in the positive direction, thereby effectively improving the light output rate.

The invention provides a silicon optical device and a coupling method thereof. The silicon optical device comprises a circuit board; a heat dissipation substrate, a silicon optical chip, an optical isolator and a lens unit are arranged above the circuit board, a plurality of lasers are arranged above the heat dissipation substrate, the lens unit comprises a collimating lens array, a half-reflecting mirror and a converging lens array, the collimating lens array and the converging lens array are vertically arranged, and the half-reflecting mirror is arranged above the collimating lens array. The first end of the collimating lens array is adjacent to the first end of the converging lens array, the second end of the collimating lens array is adjacent to the first end of the half-reflecting mirror, and the second end of the converging lens array is adjacent to the second end of the half-reflecting mirror; the collimating lens array directly faces the plurality of lasers, and the silicon optical chip directly faces the converging lens array. And the optical isolator is arranged between the converging lens array and the silicon optical chip. The space of the circuit board can be fully utilized, so that the packaging density is improved.

This disclosure provides a beam intensity homogenizing element comprising an optical substrate, a first lens array disposed on the surface of the optical substrate, and a second lens array disposed on the back surface of the optical substrate. The first lens array has a plurality of first molded lens units arranged in multiple different directions along the surface of the optical substrate. Each of the plurality of first molded lens units has a surface formed with a plurality of first linear traces extending along a first direction and constituting the surface of the optical substrate. The second lens array has a plurality of second molded lens units arranged in multiple different directions along the back surface of the optical substrate. Each second molded lens unit has a surface formed with a plurality of second linear traces extending along a second direction different from the first direction and constituting the back surface of the optical substrate. This beam intensity homogenizing element can suppress the generation of interference fringes and can reduce costs.

The invention relates to the technical field of ultra-precision optical manufacturing, in particular to a fast tool planing method for a micro-lens array, a medium and equipment. The method comprises the steps that a non-interference feasible planing tool is determined according to surface shape data of a micro lens array to be machined; building a parameter physical model of planing fundamental frequency, surface roughness and single unit machining duration based on micro lens unit parameters, cutter parameters and machining parameters; by taking a parameter limiting condition as a nonlinear constraint and the total processing duration as a target function, optimizing and solving fs, Rt, DL and fx to obtain the shortest processing duration; and finishing machining by adopting optimized parameters. According to the method, a multi-physical parameter model is innovatively constructed, collaborative optimization of optical performance (surface shape), process capability (roughness and dynamic characteristics) and manufacturing efficiency (processing time) is realized, nanoscale roughness and dynamic stability are ensured, a large-scale array processing period is remarkably shortened, and an efficient path is provided for batch manufacturing of ultra-precise optical elements.

This invention belongs to the field of optical component mounting technology, specifically a real-time coaxial optical coupling loss detection and alignment system for prisms and lens arrays. It includes an automatic loading and unloading module for automatically loading the substrate, prisms, and lens arrays, and automatically sorting and unloading qualified and unqualified products. By adopting a technical solution that uses the real-time coaxial optical coupling loss detection value as the sole criterion for final alignment of the lens array, combined with a graded alignment strategy of visual coarse alignment and coaxial optical fine alignment, it solves the common industry pain point of existing pure visual alignment and passive alignment technologies that separate physical dimensional accuracy from optical performance. This results in the inability to compensate for manufacturing errors such as uneven refractive index and surface flatness deviations within optical components, leading to substandard optical performance despite meeting physical accuracy standards and low yield rates in mass production. By using dimensional and angular tolerances only as auxiliary constraints, it directly locks the global minimum coupling loss point, improving the consistency and stability of the product's optical performance.

A three-dimensional (3D) display device including: a display unit configured to display an image; a display driver configured to display, on the display unit, a plurality of first images based on a depth component of the image and a second image based on a planar component of the image; a first lens array including a plurality of first lens elements provided at a first pitch on a rear side of the display unit; a second lens array including a plurality of second lens elements provided at a second pitch wider than the first pitch of the plurality of first lens elements on a rear side of the first lens array; a plurality of light source assemblies respectively located on rear sides of the plurality of second lens elements and including a plurality of light sources; and a light source driver.

The present disclosure relates to an intraoral scanning system configured to determine a three-dimensional surface model and a plurality of focus images. The intraoral scanning system comprises: a projector unit configured to emit light onto a dental object, wherein the emitted light comprises an infrared wavelength and a structured light, the structured light comprising a first visible wavelength; a first image sensor unit comprising: a first image sensor configured to acquire first reflected light from the dental object, wherein the first reflected light comprises the infrared wavelength, and wherein the first image sensor comprises a pixel array, a microlens array arranged in front of the pixel array and configured to transmit the first reflected light to the pixel array, wherein one or more microlenses of the microlens array direct the first reflected light to one or more pixels of the pixel array; a second image sensor unit comprising: a second image sensor configured to acquire second reflected light from the dental object, wherein the second reflected light comprises the structured light; a processor unit configured to: determine three-dimensional (3D) data of the dental object based on the second reflected light, determine a three-dimensional (3D) surface model of the dental object by merging the 3D data, and determine a plurality of focus images at different focus depths into the dental object by selecting a set of pixels from the pixel array associated with each microlens of the microlens array, and wherein the processor unit is configured to align a position of each focus image of the plurality of focus images to a position in the 3D surface model based on the 3D data.

An optical system is provided. The optical system includes a light emitting diode that generates light emissions. The optical system includes a collimator that receives the light emissions and that generates a collimated beam. The optical system includes an etendue re-shaper that splits the collimated beam into beam parts and that arranges the beam parts adjacent to each other to generate an adjacent beam part arrangement. The optical system includes micro-lens arrays that receive the adjacent beam part arrangement and that generate beams. Each of the beams includes an optimum optical efficiency or a far field intensity distribution.

An exposure head configured to expose a photosensitive drum includes: a substrate; a plurality of strip-shaped semiconductor chips each including a plurality of light emitting elements that emit light and a drive circuit that drives the light emitting element, the plurality of semiconductor chips being arranged on the substrate; and a lens array configured to collect light from the light emitting elements on the photosensitive drum. The drive circuit operates between a first potential and a second potential, the light emitting element operates between a third potential and a fourth potential, and a potential difference between the third potential and the fourth potential is equal to or larger than a potential difference between the first potential and the second potential.

The application relates to a parallel scanning imaging method based on a planar super-resolution lens array, and relates to the technical field of fluorescence microscopic imaging, wherein the method comprises the following steps: placing a biological sample to be measured on a sample stage; controlling the sample stage to move the biological sample to be measured, performing full-field pre-scanning on the biological sample to be measured, synchronously collecting images of the biological sample to be measured during the full-field pre-scanning by means of an image collection module, and obtaining a pre-scanning panoramic image; dividing the pre-scanning panoramic image into a plurality of blocks, dividing different blocks into fine scanning areas and coarse scanning areas, and finally obtaining a super-resolution image corresponding to the fine scanning areas and a low-resolution image corresponding to the coarse scanning areas; and fusing the super-resolution image and the low-resolution image to obtain a fluorescence image of the biological sample to be measured. The application realizes the imaging requirements of the biological sample in super-resolution observation and low-exposure protection.

The invention discloses a micro-lens array non-scanning type laser interference three-dimensional imaging method and device for a dynamic sample, and relates to the technical field of optical three-dimensional measurement and imaging, and the method comprises the steps: dividing laser into object light and reference light; irradiating a dynamic sample arranged at the focal plane of the micro-lens array with the object light after beam expansion, modulating the object light carrying sample information by the micro-lens array, and combining the modulated object light with the reference light in space to generate a composite interference field containing a plurality of sub-region interference patterns; recording a single-frame composite interferogram by an area array detector; and finally, reconstructing the three-dimensional morphology of the sample at the measurement moment through a phase extraction and unwrapping algorithm. By means of the mode, full-view-field three-dimensional information can be obtained through single exposure by means of the microlens array, mechanical scanning or multi-frame phase shifting is not needed, the problem of motion artifacts generated when a dynamic sample is measured through a traditional interference method is effectively solved, and high-speed and high-resolution three-dimensional imaging of the surface appearance of the dynamically-changed sample is achieved.

A personalization module, for personalization of a security document having a marking area for marking a two-image element MLI or CLI through an array of lenticular. The personalization module includes: a laser marking module, configured to mark within a marking zone, and having a laser head configured to emit a laser beam, and a laser scanner equipped with movable mirrors to deflect the laser beam towards the document. The personalization module further includes an optical prism, configured to refract the laser beam from the laser scanner mirrors to the lenticular lenses. One side of the prism enabling marking a first image element of the MLI or the CLI. The other side of the prism enabling marking a second image element of the MLI or the CLI.