30 results about "Thin lens" patented technology

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 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 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.

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 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.

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.

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 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.

The application provides a device and method for generating and controlling digital Airy-like beams, which comprises a light source, a first reflection system, a thin lens system (a first thin lens and a second thin lens), a phase modulation system (a first spatial light modulator and a second spatial light modulator), a second reflection system and an observation system; the light source is used for generating circularly polarized laser, and the circularly polarized laser sequentially passes through the first reflection system, the first thin lens, the first spatial light modulator, the second thin lens, the second spatial light modulator and the second reflection system to generate an Airy-like beam; the first reflection system and the second reflection system are used for calibrating incident light, the first thin lens is used for inversely Fourier transforming incident light, the second thin lens is used for Fourier transforming incident light, the first spatial light modulator and the second spatial light modulator are respectively used for performing cubic phase modulation on incident light waves, and the observation system is used for capturing the intensity distribution of the generated Airy-like beam.

The invention relates to the technical field of lasers, and particularly discloses a dynamic degenerate cavity laser based on a zoom lens, which comprises a collimation laser, a first aperture diaphragm, a first reflector, a laser crystal, a first thin lens, a second aperture diaphragm, a zoom lens, a second reflector and a third aperture diaphragm which are sequentially arranged in the axial direction, a pumping source is mounted beside the laser crystal; and the first small-hole diaphragm and the third small-hole diaphragm are coaxially arranged at the same height. According to the invention, the thermal lens effect of the gain medium is reduced, so that the influence of power change on the degeneracy of the cavity is reduced.

The application discloses a lens precision measurement segmenting machine positioning and clamping device and relates to the technical field of segmenting machine positioning and clamping devices.The positioning and clamping device comprises a main body mechanism, wherein a placing table and a supporting rod fixedly connected to the lower surface of the placing table are included, and a cross-shaped sliding groove is formed in the upper surface of the placing table.The lens is placed on the placing plate, the weight of the lens drives the placing plate to slide downward along the lifting groove, the downward movement is transmitted to the inclined traction rod through the connecting block and the fixed rod, and then the downward movement is converted into a horizontal driving force for the elastic toothed plate, so that the clamping force is directly derived from the weight of the lens, the heavier and larger the lens is, the greater the clamping force is, the self-adaptive matching of the clamping force and the lens specification is realized, and the problem that the thin lens is deformed under pressure due to the fixed or difficult-to-adjust clamping force of the traditional spring pressing mechanism is avoided to a certain extent, and the authenticity and accuracy of the measurement result are ensured.

The utility model relates to the technical field of laser, specifically disclose a kind of dynamic degenerate cavity laser based on zoom lens, including collimating laser, first pinhole diaphragm, first reflector, laser crystal, first thin lens, second pinhole diaphragm, zoom lens, second reflector and third pinhole diaphragm that are arranged in axis in proper order;The laser crystal side is equipped with pump source;First pinhole diaphragm with the third pinhole diaphragm iso-altitude coaxial arrangement.The utility model reduces the thermal lens effect of gain medium, thereby reduce the influence of power change on cavity degeneracy.

Systems and methods for a cost-effective, high-performance optical lens for head mounted displays (HMDs) or other applications. The lens assembly combines a thin lens with microfeatures on at least one transmission surface, and a thicker lens with a curved surface, allowing for plano-convex or bi-convex configurations. Both lenses have mounting areas with complementary microfeatures on their peripheries, facilitating their coupling and self-alignment within low tolerances. These microfeatures, including the mounting ones, can be generated using a high-precision process like diamond turning, thereby ensuring precision in alignment and function.

The application discloses an optical initial structure generation method based on a differentiable ray tracing. The method comprises the following steps: obtaining a first-order structure of an optical system; optimizing the first-order structure of the optical system to obtain an optimized first-order structure of the optical system; obtaining and screening a plurality of processed initial thin lens structures according to the first-order structure of the optical system; sequentially processing each processed initial thin lens structure by using a plurality of methods to obtain a corresponding optimized thin lens structure; and comprehensively processing all the optimized thin lens structures to finally obtain an optimal optical initial structure. The application realizes the beneficial effect of generating an excellent first-order structure of an optical system, brings the advantage of screening an optimal optical initial structure from multiple structures, and achieves the progress of simple operation, higher automation and significant improvement of optical design efficiency.

The invention discloses a diffraction quantitative phase microscopy device and method based on phase contrast modulation, and the device comprises an annular illumination module, a microscope objective, a phase contrast modulation module, a thin lens and an image collection module which are sequentially and coaxially arranged along the propagation direction of a light path, the annular illumination module is used for sequentially or simultaneously generating a plurality of oblique illumination lights in different directions so as to implement oblique illumination on a sample in different directions and generate object light waves carrying sample information; the microscope objective is used for forming an object light wave spectrum limited by an aperture; the phase contrast modulation module is used for applying 0.5 pi phase modulation to a non-scattering component which is not influenced by the sample and contained in an object light wave spectrum limited by the aperture; the thin lens is used for forming object light waves which are limited in frequency spectrum and subjected to phase contrast modulation; the image acquisition module is used for recording intensity distribution of object light waves from the thin lens. The phase contrast modulation technology is introduced into a diffraction quantitative phase microscopic imaging system, and the bottleneck of matched illumination is solved.

This utility model discloses an optical glass coating fixture, including a back plate and two fixing rods disposed at the upper and lower ends of the front side of the back plate. A fixing plate is disposed on the front side of each fixing rod, and clamping arms are respectively disposed at the left and right ends of the front side of the fixing plate. An upper clamping block is disposed at the end of the upper clamping arm, and a lower clamping block is disposed at the end of the lower clamping arm. A threaded rod is disposed on the inner middle side of the upper clamping block, and an upper magnet is disposed at the lower end of the threaded rod. A sleeve is disposed on the inner middle side of the lower clamping block, and a sleeve rod is disposed on the inner middle side of the sleeve. A lower magnet is disposed at the upper end of the sleeve rod. This fixture allows for precise adjustment of the height of the upper magnet through the threaded rod, and by combining the dynamic balance of magnetic attraction and spring force, it can adaptively clamp optical glass of different thicknesses. Whether it is an ultra-thin lens or a thick glass plate, it can achieve uniform and stable clamping, avoiding adaptation problems caused by size differences.

The utility model relates to the technical field of laser, in particular to a mode programmable laser generator based on a degenerate cavity. The generator comprises a resonant cavity, a 4-f self-imaging system, a gain medium, a pinhole diaphragm, a linear polarizer, an F-P etalon, a wave plate group and a pumping source. The resonant cavity comprises a liquid crystal layout of the liquid crystal spatial light modulator and an output coupling mirror which are arranged in parallel; the 4-f self-imaging 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 liquid crystal spatial light modulator and the first thin lens; the small-hole diaphragm is arranged between the first thin lens and the second thin lens; the linear polaroid is arranged between the gain medium and the small-hole diaphragm; the F-P etalon is obliquely arranged between the small-hole diaphragm and the second thin lens; the wave plate group is arranged at one end outside the resonant cavity close to the output coupling mirror; the pumping source is arranged on the side edge of the gain medium. According to the invention, the transverse mode, the longitudinal mode and the polarization mode of the resonant cavity can be regulated and controlled, so that laser mode programming is realized.

The invention relates to the technical field of underwater optical imaging, in particular to an underwater transmission optical imaging system, which is characterized in that a light beam from a wet bin optical part is imaged in an image sensor after being zoomed by a dry bin optical part; the wet bin optical part comprises a front Fresnel thin lens and a rear Fresnel thin lens with positive focal power, parallel light from the underwater environment is converged by the front Fresnel thin lens, and then the converged light is diffused by the rear Fresnel thin lens and is transmitted into the dry bin optical part; the dry bin optical part comprises a front fixed lens and a zoom lens group, the position of the front fixed lens is fixed, the zoom lens group linearly and differentially moves between the front fixed lens and the image sensor with the fixed position, and light beams from the wet bin optical part are converged in the image sensor. According to the invention, underwater large-aperture high-flux long-distance detection is realized on the basis of light collection and magnification of the Fresnel thin lens and the dry bin optical part which is matched with the movable lens to do linear differential movement.