42 results about "Thin lens" patented technology

The invention discloses a rapid quantitative differential interference microscopy system and method based on holographic recording. The system comprises a partially coherent illumination module, and a microscope objective, a tube lens, a transmission grating, a first linear polarizer, a first thin lens, a half-wave plate, a shading plate, a phase-type spatial light modulator, a second thin lens, a second linear polarizer and an image acquisition module which are sequentially arranged along the optical axis direction of the partially coherent illumination module. According to the invention, the phase-type spatial light modulator is utilized to realize shearing offset in any direction and at any degree, so that the device is suitable for different types of application occasions; the system realizes holographic recording of differential interference by utilizing grating carrier frequency, realizes quantitative differential interference detection on a to-be-detected sample only by utilizing two acquired images, has very high time resolution, spatial resolution and imaging precision, and has a wide application prospect in biological imaging and industrial detection.

The invention relates to a sweeper ultra-thin lens highlight mold capable of achieving ultrasonic-assisted demolding, and belongs to the field of molds, the sweeper ultra-thin lens highlight mold comprises a base, a mold assembly and a demolding mechanism, the mold assembly is fixedly arranged at the top of the base, and the demolding mechanism is arranged on the inner wall of the mold assembly; the mold assembly comprises a fixed mold fixedly arranged at the top of the base, electric push rods are fixedly arranged at the positions, located on the two sides of the fixed mold, of the top of the base, and movable molds are fixedly arranged at the top ends of the two electric push rods; the demolding mechanism comprises an ultrasonic assembly and an ejection assembly. According to the ultrasonic-assisted demolding highlight mold for the ultra-thin lens of the sweeper, through cooperation of the ultrasonic assembly and the ejection assembly, the formed lens is separated from the mold core through high-frequency vibration generated by ultrasonic waves, and then the lens is ejected out of the mold core in cooperation with the ejection assembly; and the problems of scratches, deformation and the like on the surface of the lens caused by non-uniform ejection or local stress concentration are effectively avoided.

The invention relates to the technical field of surface topography measurement, and discloses a spectral interference surface topography measurement method and device based on a metasurface. The device comprises a spectrograph, a white light source, an optical fiber, a focusing metasurface and a dispersion metasurface, the focusing metasurface and the dispersion metasurface are arranged in parallel and aligned, a spherical thin lens and a micro-nano structure are arranged on the two sides of the focusing metasurface respectively, and a reflecting metal film is arranged between the two sides; a semi-transparent and semi-reflective film and a micro-nano structure are arranged on the two sides of the dispersion metasurface respectively; the focusing metasurface is used for converging parallel incident light, one part of light serves as reference light and is reflected and focused on the reflective coating by the semi-transparent and semi-reflective film, and the other part of light serves as measuring light and penetrates through the semi-transparent and semi-reflective film; the dispersion metasurface is used for carrying out axial dispersion on light penetrating through the semi-transparent and semi-reflective film, monochromatic light focused on the to-be-measured surface returns along a light path and interferes with reference light, and a confocal signal or an interference signal is generated to calculate morphology information of the to-be-measured surface. By adopting the device, high-precision surface topography measurement can be realized in a narrow space.

The invention relates to the technical field of precision grinding, in particular to an aluminum-based silicon carbide ultrathin reflector precision machining method based on gradient grinding, which comprises the following steps: preparing an aluminum-based silicon carbide green body from silicon carbide and aluminum, annealing for 4 hours, eliminating residual stress, and mechanically cutting and chamfering to obtain a roughly machined aluminum-based silicon carbide green body; in a precise surface grinding machine, the roughly-machined aluminum-based silicon carbide green body is subjected to staged gradient grinding, and the ultrathin lens is obtained; and polishing the ultrathin lens in a magneto-rheological polishing machine to obtain the aluminum-based silicon carbide ultrathin reflector based on gradient grinding. The composite grinding tool is prepared from a diamond micro-powder surface layer, a cerium oxide nano-particle / graphene composite middle layer and an elastic polymer substrate. A composite grinding tool is adopted, and the quality performance of the ultrathin reflecting mirror is ensured through vibration absorption of the elastic polymer substrate, chemical softening and thermal management of the cerium oxide nanoparticle / graphene middle layer and gradient structure design.

The invention discloses an MEMS imaging pressure integrated sensing probe based on a meta ultra-thin lens and a processing method, the integrated sensing probe comprises an optical fiber bundle, a gasket and the meta ultra-thin lens after wet etching from bottom to top, the meta ultra-thin lens after wet etching comprises a metasurface and an ultra-thin substrate, and the ultra-thin substrate is used for realizing MEMS pressure sensing. The ultra-thin substrate of the metasurface lens is realized through a sacrificial layer removal process, and the diameter and the rigid length of the integrated probe meet the ultra-thin application requirement in combination with micro-scale cutting and integration.

The application discloses a continuous zooming optometry optical system, which comprises a negative spherical thin lens L1, a positive spherical thin lens L2 and a negative spherical thin lens L3 arranged in sequence on the same optical axis, the negative spherical thin lens L1 is arranged along the optical axis, the optical center of the negative spherical thin lens L3 is located at the image-side focal point of the positive spherical thin lens L2, the optical power of the negative spherical thin lens L1 is the optical power of the positive spherical thin lens L2 is the optical power of the negative spherical thin lens L3 satisfies the following relationship, and the application further discloses a portable subjective optometry instrument comprising the continuous zooming optometry optical system. The application can accurately simulate the optometry process of the plug-in sheet optometry, the optometry process is fast, the optometry result is accurate, and the optometry and lens matching time can be greatly shortened.

The magnifying lens comprises a handle, a lower lens ring, an upper lens ring, a main convex lens and a thin lens, the side wall of the lower lens ring is provided with a connecting seat, the connecting seat is movably connected to the bottom of the handle, the connecting seat is provided with an adjusting piece, the upper lens ring is movably arranged on the adjusting piece, and the main convex lens is arranged on the upper lens ring. The main convex lens is fixedly arranged on the lower lens ring, and the thin lens shell is detachably arranged on the upper lens ring. The utility model belongs to the technical field of magnifying glass frames, and particularly relates to a magnifying glass capable of detecting cracks.

The invention discloses a critical focal length active intervention-based myopia correction intelligent glasses system and a training method, and relates to the technical field of vision correction. The system adopts an ultrathin aspherical lens (refractive index 1.74) design, focuses 12-45-year-old 0-600-degree myopic users, and realizes personalized intervention through a degree segmentation training model; the core method comprises the following steps: detecting a real degree D0 for multiple rounds, calculating a critical compensation degree D2 constrained by hardware in combination with a visual object distance L, taking the D2 as a unique reference for visual training and close-range active intervention, dynamically adjusting the training intensity, and carrying out progressive intervention on close-range eye use. According to the method, the scientific theory, the ultrathin lens design and the degree segmentation adaptation are deeply combined for the first time, the core innovation lies in a closed-loop system of critical focal length unified calculation and training and intervention sharing the same reference, the pain points that in the prior art, the theory cannot fall to the ground and the height number wearing experience is poor are solved, creativity and falling performance are achieved, and the method is suitable for large-scale popularization and application. The glasses can achieve degree control and vision recovery, meet daily wearing requirements, and have remarkable practical value and innovation value.

The invention provides a high-power femtosecond laser peak power multiplying device based on sheet self-compression. The high-power femtosecond laser peak power multiplying device is composed of a high-power femtosecond laser pulse, a thin lens, a fused quartz solid sheet set, a movable sliding rail, a convex reflector, a dielectric film reflector and a self-compression pulse in sequence in the direction of an incident light beam. The characteristic that negative dispersion can be generated due to the fact that femtosecond laser transmits the fifth-order nonlinear effect in quartz glass is utilized to be balanced with the Kerr effect and the positive dispersion of a quartz glass material, and the spectrum is broadened to achieve pulse self-compression under the condition that the quality of light beams is kept during transmission. Peak power multiplication of high-power femtosecond laser pulses can be achieved in a pulse self-compression mode, and the device has the advantages of being simple in structure, convenient to operate, stable, efficient and wide in application range. The device can be applied to the field of high-power femtosecond laser pulse compression and shaping, and can be better applied to application research of laser electron acceleration, higher harmonic generation and the like.

The invention relates to a thin lens control device and method, and relates to the technical field of lens processing. The device comprises a rack and a workbench rotationally arranged on the rack, and the workbench is provided with a plurality of sets of clamp bases used for bearing lens bodies and cloth liners; a storage barrel used for storing a cloth liner is arranged on one side of the workbench, a rotating arm is rotationally arranged between the workbench and the storage barrel, an adsorption assembly used for adsorbing the cloth liner is arranged on the rotating arm, and a lifting assembly used for driving the adsorption assembly to ascend and descend is arranged on the rotating arm. A rotating assembly for driving the cloth liner to rotate is arranged on the rotating arm; the device has the effect of improving the feeding efficiency of the cloth liner and the polishing machining efficiency of the lens.

Disclosed are co-polymers which are produced from reactive monomer mixtures and which have both high refractive index and a high Abbe number. These materials are well suited for use as implantable ophthalmic devices and have a refractive index which may be edited through application of energy. When used for an intraocular lens, the high refractive index allows for a thin lens which compresses to allow a small incision size.

The present invention provides an adaptable thin lens for correcting visual aberrations, the adaptable thin lens comprising a plurality of design elements organized in at least one optical zone, wherein the design elements are selected from the group consisting of concave designs, convex designs, flat designs, Fresnel-like designs, free-form prism designs, and combinations thereof, the adaptable thin lens being capable of being placed into any desired frame of eyeglasses or sunglasses, and being attached to or printed on an existing lens, while providing sufficient correction of visual aberrations.

The invention discloses a large numerical aperture quantitative phase microscopy system and method based on a KK relation. The system comprises an illumination module, a microscope objective, a lens cone lens, a visual field limiting module, a first thin lens, a linear polarizer, a second thin lens, a first phase type spatial light modulator, a third thin lens, a second phase type spatial light modulator, a fourth thin lens and a polarization camera which are arranged in sequence, and the illumination module performs transmission type oblique illumination on a sample; the visual field limiting module is used for carrying out space limitation on an illumination field and a scattering field; the linear polarizer is used for decomposing a light field into an X polarization component and a Y polarization component; the first phase-type spatial light modulator is used for modulating the Y polarization illumination field and the Y polarization scattering field; the second phase-type spatial light modulator is used for performing phase modulation on the Y polarization scattered field; the polarization camera is used for obtaining intensity distribution and hologram distribution of the illumination field. According to the invention, the sample can be subjected to label-free, high-resolution and high-stability in-situ quantitative detection.

The present application relates to underwater optical imaging technology field, especially to a kind of underwater transmission optical imaging system, from the light beam of wet warehouse optical department zooms after in image sensor, imaging;Wet warehouse optical department includes the front Fresnel thin lens of positive refractive power and rear Fresnel thin lens, parallel light from underwater environment converges after the front Fresnel thin lens, and the convergent light is diffused again through the rear Fresnel thin lens, and is transmitted to dry warehouse optical department;Dry warehouse optical department includes front fixed lens and zoom lens group, the position of front fixed lens is fixed, and zoom lens group is linear differential type between front fixed lens and position fixed image sensor Move, the light beam from wet warehouse optical department converges in image sensor.The present application is based on the light-gathering increase of Fresnel thin lens, and the dry warehouse optical department of movable lens linear differential type movement is realized underwater large aperture high flux long distance detection.

Disclosed are co-polymers which are produced from reactive monomer mixtures and which have both high refractive index and a high Abbe number. These materials are well suited for use as implantable ophthalmic devices and have a refractive index which may be edited through application of energy. When used for an intraocular lens, the high refractive index allows for a thin lens which compresses to allow a small incision size.

The application discloses a kind of machine learning-based all-solid-state laser thermal compensation method, device and laser, wherein the method comprises: according to the parameters of the working substance of the all-solid-state laser to be compensated and the pump light power, the lens model type is selected, the lens model type is: thin lens model or thick lens model;Thermal compensation is carried out on the all-solid-state laser using the thin lens model or the thick lens model and negative lens.The thick lens model constructed simultaneously considers the influence of temperature gradient, thermal stress and end face deformation on multi-section bonded laser crystal, can more accurately simulate the thermal lens effect of multi-section doped crystal, so as to improve the performance of all-solid-state laser.

Metasurfaces and systems including metasurfaces for imaging and methods of imaging are described. In one embodiment, a method for acquiring images by an imaging system comprising a metalens includes: illuminating the metalens; acquiring light passing through the metalens as a first image by an image sensor; and processing the first image into a second image that is a deconvolved version of the first image by a post-processing engine. The metalens includes a plurality of nanoposts carried by a substrate.

The invention relates to the technical field of lenses, in particular to a lens image quality improving device for a severe environment. A lens image quality improving device for a severe environment comprises a protection frame, a signal control module, a thin lens and a collection bin. The signal control module and the plurality of thin lenses are arranged in the protection frame; the signal control module comprises a signal transmission module and a page turning control module; the page turning control module comprises a transmission assembly, the multiple thin lenses are arranged on the transmission assembly, and the signal control module transmits replacement signals fed back by the lenses to the page turning control module. The page turning control module drives the single thin lens on the outermost side to move out of the light path through the transmission assembly and recover to the collecting bin. The thin lens is replaced through a multi-form trigger mechanism to maintain the quality of an image collected by the lens, improve the definition and durability of the lens, and solve the problem that the definition of the image collected by the lens is affected by environmental factors.

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 belongs to the technical field of integer factorization, and particularly relates to an integer factorization method and system based on a vortex beam, which comprises the following steps: setting an integer to be factorized as a mode index of a vortex beam, adjusting an azimuth angle of a pinhole in a digital microlens array device according to a factor to be tried; sequentially irradiating the digital microlens array device and a first thin lens with the vortex beam, and capturing an intensity distribution diagram at a back focal plane of the first thin lens by using a CCD camera; performing normalization processing on the intensity distribution diagram to obtain a normalized optical axis intensity value; and judging whether the factor to be tried is a factor of the integer to be factorized according to the optical axis intensity value. The integer factor and non-factor can be quickly distinguished by judging whether the factor to be tried is the factor of the integer to be factorized according to the optical axis intensity value.

The application relates to the technical field of surface topography measurement, and discloses a spectral interference surface topography measurement method and device based on a super surface. The device comprises a spectrometer, a white light source, an optical fiber, a focusing super surface and a dispersive super surface which are placed in parallel alignment, the two sides of the focusing super surface are respectively provided with a spherical thin lens and a micro-nano structure, and a reflective metal film is arranged between the two sides; the two sides of the dispersive super surface are respectively provided with a semi-transparent semi-reflective film and a micro-nano structure; the focusing super surface is used for converging parallel incident light, part of the light is reflected by the semi-transparent semi-reflective film and focused on a reflective coating as reference light, and the other part of the light is transmitted through the semi-transparent semi-reflective film as measurement light; the dispersive super surface is used for axially dispersing the light transmitted through the semi-transparent semi-reflective film, monochromatic light focused on a surface to be measured returns along an optical path and interferes with the reference light, and a confocal signal or an interference signal is generated to solve the topography information of the surface to be measured. The device can realize high-precision surface topography measurement in a narrow space.

The invention relates to a laser wireless charging system and method in a composite cavity based on a semiconductor array, the system comprises a transmitting end and a receiving end, the transmitting end comprises a plurality of semiconductor lasers, a plurality of collimating lenses, a plane mirror and a thin lens, the semiconductor lasers, the collimating lenses and the plane mirror form a main resonant cavity unit, and the thin lens forms a main resonant cavity unit; the plane mirror and the thin lens form a first reflex reflector; the receiving end comprises a thin lens, a plane mirror and a photovoltaic cell, the thin lens and the plane mirror form a second reflex reflector, and the photovoltaic cell is used for absorbing the transmission laser of the emergent light beam of the main resonant cavity and converting the power of the transmission laser into electric energy; the first reflex reflector and the second reflex reflector form a free space resonant cavity, and optical energy feedback and transmission between the transmitting end and the receiving end are achieved. Compared with the prior art, the safety and multi-device compatibility of the system in a dynamic charging scene are improved.

This application provides a method and related equipment for generating and selecting calibration board poses based on geometric constraints. In this method, the camera calibration system first acquires the hardware parameters of the camera, lens, and calibration board. It then uses a thin lens model combined with lens parameters to obtain the near-far distance of the depth of field, and further combines this with the field of view to determine the three-dimensional feasible space range of the calibration board. Next, the camera calibration system samples depth coordinates within the depth of field range, calculates the maximum allowable tilt angle and generates a rotation matrix, while simultaneously sampling translation vectors to construct temporary poses and calculate corner coordinates. Then, the camera calibration system eliminates temporary poses that exceed the feasible space at corner points and those with high similarity to existing poses, obtaining a set of candidate poses. Finally, the camera calibration system calculates a comprehensive distance metric for the candidate poses and iteratively selects the pose with the largest distance to form the target pose set. This method alleviates the technical problem of camera parameter calculations deviating from the true values ​​and improves the accuracy of camera calibration.

1. Name of the design product: Ultra-thin lens (flat lamp, supermarket lamp, office lamp). 2. Use of the design product: Used for LED lamp light distribution. 3. Design points of the design product: In shape. 4. Picture or photo that best indicates the design points: Design 1 perspective view. 5. Design 1 is designated as the basic design.

The utility model relates to the technical field of laser, in particular to a multimode chaotic laser generating device based on pumping modulation. The device comprises a resonant cavity, a 4-f telescope system, a gain medium, a pinhole diaphragm and a pumping source. The resonant cavity comprises a plane mirror and an output coupling mirror which are coaxially arranged; the 4-f telescope system is arranged in the resonant cavity and comprises a first thin lens and a second thin lens which are coaxially arranged; the gain medium is arranged between the plane mirror and the first thin lens; the small-hole diaphragm is arranged between the first thin lens and the second thin lens; the resonant cavity, the 4-f telescope system, the gain medium and the small-hole diaphragm are coaxial; the pumping source is arranged on the side edge of the gain medium and used for providing energy for laser generation. According to the invention, multi-transverse-mode resonance characteristics of the degenerate cavity and system instability induced by pumping modulation are combined, multi-mode laser output is realized from a space dimension, and chaotic output is realized from a time dimension.

The invention discloses a three-dimensional imaging system based on mixed scattered field and polarization phase contrast detection, and the system comprises a vertical illumination module, a first thin lens, a non-polarization beam splitting prism, a lens cone lens, a microscope objective, a second thin lens, a linear polarizer, a phase-type spatial light modulator, a third thin lens, and a polarization camera. The vertical illumination module is used for generating non-polarized and partially coherent divergent light; the first thin lens collimates the divergent light and enables a collimated light beam to enter the non-polarization splitting prism at a preset inclination angle, and the collimated light beam is irradiated to the slide and the sample to be measured through the lens cone lens and the microscope objective and generates mirror surface irradiation light and a two-dimensional backscattering field; the second thin lens, the linear polarizer, the phase-type spatial light modulator, the third thin lens and the polarization camera are sequentially arranged on the side, away from the lens barrel lens, of the non-polarization splitting prism. According to the invention, the in-situ three-dimensional refractive index of the sample to be detected can be detected in an unmarked, high-speed, high-quality and high-stability manner.

The present invention relates to an ultra-thin lens for augmented reality display, which includes a main lens, an intermediate lens, and an auxiliary lens. After the image light enters the main lens, it undergoes two total internal reflections, and then enters the intermediate lens where it is partially reflected, and then passes through the intermediate lens and the main lens and shoots towards the human eye, thereby magnifying the image presented by the microdisplay to form a virtual image, which is observed by the user's eyes; the auxiliary lens is disposed on the other side of the intermediate lens, and the ambient light forms an image towards the human eye after passing through the auxiliary lens, the intermediate lens, and the main lens; at least the first outer surface of the ultra-thin lens composed of the main lens and the auxiliary lens faces the side of the exit pupil, and the main lens, the intermediate lens, and the auxiliary lens jointly form the second outer surface of the ultra-thin lens facing the environment side. The above ultra-thin lens realizes the total internal reflection and beam splitting functions of the image light through the main lens and the intermediate lens respectively, making the entire lens have a thin and light appearance. The present invention also provides a virtual image imaging device and a near-eye display including the ultra-thin lens.

The utility model discloses a high refractive index polarized resin lens, which comprises a refraction assembly, a protection assembly is arranged outside the refraction assembly, through the arrangement of the refraction assembly, the lightening and thinning of the lens are realized, the requirements of crowds with high heights on the light and thin lens are met, meanwhile, good optical properties such as definition and color rendition degree are ensured, and visual interference is reduced. A wearer can obtain more comfortable and clearer visual experience in various light environments (such as driving, outdoor sports or electronic equipment using), meanwhile, the problems that an existing high-refractive-index polarized resin lens is insufficient in protection performance and difficult to give consideration to the high-refractive-index effect are solved, comprehensive protection can be provided by arranging the protection assembly, and the protection effect is improved. The lens is effectively prevented from being damaged by external impact, abrasion and blue light, the service life of the lens is prolonged, and meanwhile the stability of optical performance is kept.

This invention discloses a rapid quantitative differential interferometry microscopy system and method based on holographic recording. The system includes a partially coherent illumination module and, sequentially arranged along the optical axis of the partially coherent illumination module, a microscope objective, a microscope tube lens, a transmission grating, a first linear polarizer, a first thin lens, a half-wave plate, a light-shielding plate, a phase-type spatial light modulator, a second thin lens, a second linear polarizer, and an image acquisition module. This invention utilizes a phase-type spatial light modulator to achieve shear shifts in any direction and to any degree, making it suitable for various applications. The system uses the grating carrier frequency to achieve holographic recording of differential interferometry, enabling quantitative differential interferometry detection of the sample using only two acquired images. It exhibits very high temporal resolution, spatial resolution, and imaging accuracy, showing broad application prospects in biological imaging and industrial detection.

The lens mold comprises a first mold body and a second mold body, the first mold body is provided with a first lens forming face, at least two forming plates are installed on the first mold body in a sliding mode, all the forming plates are arranged in the circumferential direction of the first lens forming face, and a forming groove is formed in one end of each forming plate; the forming plate can slide close to or away from the first lens forming surface; the first die body is provided with a first lens forming face, the second die body is provided with a second lens forming face, a driving device is arranged between the first die body and the second die body and used for driving the forming plate to slide to be close to or away from the first lens forming face, and a pouring system is arranged between the first die body and the second die body. And all the forming plates are close to the first lens forming surface, the side walls of all the forming grooves, the first lens forming surface and the second lens forming surface enclose to form a lens forming cavity. The lens mold provided by the invention can effectively avoid serious deformation of a large-size thin lens in a demolding stage, and ensures the quality of the lens.