425 results about "Superlens" patented technology

A metalens for focusing light is described. The metalens includes a library of elements for varying the propagating phase of the focusing light over at least a 2π radians range, where the library of elements is arranged in a sub-wavelength pattern that defines spacings between the elements. Each spacing exhibiting temperature-dependent spacing changes within a temperature range and each element in the library of elements includes: a refractive index exhibiting a temperature-dependency within the temperature range, a shape exhibiting a temperature-dependency within the temperature range, and a size exhibiting a temperature-dependency within the temperature range. The metalens also includes a phase profile defined by a combination of the refractive index, shape, and size of each element in the library, and the sub-wavelength pattern of the library of elements. The metalens also includes a focal length defined by the phase profile, the focal length exhibiting a temperature-dependency within the temperature range.

The invention discloses a super-lens image restoration method based on fuzzy prior and semantic segmentation. The method comprises the following steps: eliminating an image visual angle displacement error by adopting a feature point automatic registration algorithm; the method comprises the following steps: designing a parallel multi-scale convolution adapter on the basis of an encoder optimized by a pre-trained visual Transform model, and generating encoding features adaptive to the degradation characteristics of a super lens; splicing the degraded image and the semantic segmentation mask into a joint tensor along a channel dimension, and obtaining a prior feature based on a fuzzy prior extraction network; performing spatial feature enhancement on the semantic segmentation mask based on a semantic segmentation graph convolutional network to obtain graph features aligned with the coding features; splicing the coding features, the prior features and the image features along channel dimensions to generate fusion features, and finally outputting a preliminary recovery image; and optimizing the whole model by adopting a staged training strategy, and finally outputting a high-quality recovery graph. According to the method, the physical rationality and detail fidelity of the recovery quality are improved.

The invention relates to an optical super lens suitable for an extreme environment and a preparation method thereof, and the optical super lens comprises a super lens structure layer located at the center, and moth-eye membrane structure layers, an optical substrate and an optical composite membrane which are symmetrically disposed at two sides of the super lens structure layer. The super-lens structure layer, the moth-eye membrane structure layer and the optical substrate are respectively and independently made of wide-band-gap semi-conductive materials with the thermal conductivity of 50 W / m.K or above, and at least one structure parameter of the moth-eye membrane structure layer in the thickness direction of the optical substrate is modulated so as to complete refractive index transition from the super-lens structure layer to the optical substrate. According to the invention, the problem of efficiency reduction caused by refractive index mismatch is solved, and the optical super lens can work normally under extreme conditions such as high temperature or high power.

The invention relates to full-dielectric adjustable optical tweezers based on a composite phase superlens, and belongs to the technical field of optical tweezers. Two regulation modes of geometric phase and transmission phase are integrated into a dielectric metasurface periodic structure, and a circular lens surface is combined according to a specific mapping and arrangement mode. The super lens can excite two different output electric fields under the input of linearly polarized light due to the regulation and control of a composite phase, and the two electric fields can independently exist under the input of circularly polarized light with opposite chirality. Therefore, by adjusting the polarization type of the incident light source of the super lens, free switching of multiple optical capturing modes of particles in a field can be realized. Compared with the existing optical tweezers, the control mode can be flexibly adjusted on the premise that the structure of the device is not changed, and more diversified particle capturing requirements can be met. The high-flexibility and easy-to-integrate micro-nano structure can provide powerful guarantee for the performance of a compact composite optical capturing device.

The invention relates to the technical field of information processing, in particular to the technical field of optical detection, and particularly relates to a two-dimensional material layer number identification method and equipment. A photoelectron chip composed of a semiconductor light source, a 2 * 2 waveguide beam splitter, a grating coupler, an on-chip spectrometer, a super lens and an optical detector is compact in structure and low in cost; a semiconductor light source emits an optical signal, the optical signal sequentially passes through a 2 * 2 waveguide beam splitter, a grating coupler and a super lens and then irradiates a two-dimensional material sample, a displacement table is used for carrying out accurate Z-axis focusing and XY plane scanning, reflection spectrum signals are collected in real time, spectrum characteristics are analyzed through an upper computer to determine layer number information, and finally a layer number distribution diagram is generated. According to the method, rapid, automatic and high-precision identification of the number of layers of the two-dimensional material is realized, and large-range scanning detection is facilitated.

The invention relates to an optical super lens with high focusing efficiency and a preparation method thereof. The optical super lens comprises a pair of optical substrates, antireflection films arranged on the surfaces of one sides of the optical substrates, moth-eye films arranged on the surfaces of the other sides of the optical substrates in a protruding mode, and a plurality of nano dielectric cylinders arranged between the pair of moth-eye films and made of high-refractive-index materials. At least one structural parameter of the plurality of nano dielectric cylinders in the length direction of the optical substrate is modulated to meet phase distribution of 2 pi, and at least one structural parameter of the moth eye mask in the thickness direction of the optical substrate is modulated to complete refractive index transition from the plurality of nano dielectric cylinders to the optical substrate. According to the invention, the problem of transmittance reduction caused by refractive index mismatch in a traditional optical super lens is solved, and the focusing efficiency of the optical super lens is effectively improved on the basis of not influencing the original phase distribution.

The invention discloses a super-lens design method based on etching uniformity compensation and an optimization system thereof. The super-lens design method specifically comprises the following steps: S1, etching a wafer and establishing an etching rate space distribution model; S2, designing layout partitions and distributing compensation coefficients; s3, pre-compensating the size of the nano structure; s4, generating a final mask and executing etching; according to the method, the space size pre-compensation of the nano structure is actively performed in the mask design stage, and the phase deviation caused by non-uniform etching depth is counteracted by using the change of the effective refractive index of the nano unit, so that the high-performance super lens is obtained under the non-ideal process condition, and the limitation of the process physical limit is broken through.

The utility model relates to the technical field of super-structure lenses, and particularly discloses a fully-integrated polarization imaging device based on a polarization beam splitting super-lens. The fully-integrated polarization imaging device based on the polarization beam splitting superlens comprises a nanopillar array, a transparent medium substrate and an image sensor, a nanorod array is arranged on one side surface of the transparent medium substrate; the image sensor is arranged on the other side, far away from the nanorod array, of the transparent medium substrate; the image sensor is provided with at least two pixel areas; the light beams output from the nano-pillar array pass through the transparent medium substrate and then are split and focused to the pixel area. According to the utility model, the nanorod array, the transparent medium substrate and the image sensor are integrated together, so that the interference of an external light path is reduced, the imaging stability and reliability are improved, the structure is compact, and the size is small. The nanorod array can accurately control polarization and phase of light, high-resolution imaging is achieved, and the problems that an existing polarization system is low in integration degree, large in size and low in resolution are solved.

A lens system having reduced physical size. The lens system includes multiple metalenses, lenses with metasurfaces, that integrate the lens and the free space and compress them into multiple layers of metasurfaces, significantly reducing the overall volume and weight of the imaging system while increasing its efficiency. The lens system also provides for tools that can accurately model 3D multilayer metasurfaces, carry out inverse design to find the optimal and fault-tolerant structure, fabricate the metasurfaces with multi-project wafer service, assemble them with a 3D-printed holder, and characterize the performance of the resulting ultra-compact imaging system.

According to the metasurface device for snapshot type high dynamic range imaging and the imaging system and method thereof provided by the invention, the dynamic range of a camera can be improved by integrating a plurality of superlenses with different transmittances on a single metasurface; the polarization-independent metasurface is designed by using a pure phase modulation principle, so that the system stability is greatly improved; compared with other backlight imaging methods, the method has the advantages of high integration level, single measurement and space and time cost saving, and has a certain reference effect on development of ultra-compact imaging equipment and improvement of dynamic range imaging capability.

The invention belongs to the technical field of micro-nano optics. The invention provides a multi-focus off-axis super lens of a visible light wave band. The multi-focus off-axis super lens comprises a plurality of groups of off-axis single-focus sub super lens assemblies which are circularly arranged, wherein each group of off-axis single-focus sub super lens assemblies comprises a plurality of off-axis single-focus sub super lenses which are concentrically and annularly distributed; wherein the off-axis single-focus sub-super-lens comprises a micro-structure unit and a substrate unit, the micro-structure unit comprises a plurality of micro-structure columns which are uniformly arranged, and one end of each micro-structure column is arranged on the substrate unit. According to the embodiment of the invention, on the basis of a geometric phase modulation principle, through reasonable phase design and microstructure arrangement, the off-axis single-focus sub-super-lens has a designed focus position; through spatial multiplexing of the micro-structures of the multiple off-axis single-focus sub-super-lenses, one super-lens has the phase characteristics of the multiple off-axis single-focus sub-super-lenses, and the functions of the multiple off-axis single-focus sub-super-lenses are achieved on one super-lens.

The invention relates to the technical field of image processing, and discloses an infrared super-lens image quality enhancement method based on fusion of double-path decoding and physical perception prompt, which comprises the following steps: S1, generating a physical parameter prompt, acquiring geometric and optical characteristic parameters of an infrared super-lens, and converting the parameters into textualized prompt vectors; s2, constructing a data set; s3, cross-modal feature coding and fusion are carried out; and S4, carrying out double-path decoding and reconstruction. According to the infrared super-lens image quality enhancement method based on the fusion of the two-way decoding and the physical perception prompt, by introducing physical parameter prompt and cross-modal feature fusion, the imaging physical prior of an infrared super-lens is effectively fused into a network, so that a model can understand a degradation source and imaging constraints; and deep collaboration of visual information and physical attributes is realized in a feature extraction process. The design not only enhances the adaptability of the model to a complex imaging system, but also improves the interpretability and robustness of an enhancement result.

The invention discloses a super-lens element atomic structure reverse design method and electronic equipment, and relates to the field of super-lens element atomic structure design. The method comprises the following steps: extracting modal features of element atom structure images and phase spectrum data through a differential perception fusion module, and generating structure image side information and phase spectrum side information; on the basis, asymmetric association representation is constructed, a prompt factor is generated, and a prompt guide fusion feature is formed; and fusing asymmetric correlation representation, prompting and guiding fusion features, element atom structure images and phase spectrum data, generating cross-modal fusion features, and relieving alignment difficulty caused by modal isomerism. Then, semantic modeling and structure enhancement are carried out through a structure difference perception module, and enhanced fusion representation is obtained; and finally reconstructing the dimension and rearranging the space through a feature rearrangement inversion module, and synchronously outputting a predicted element atom structure image and phase spectrum data thereof, thereby realizing bimodal joint generation.

A display device includes: an image projector including an image forming device and a meta-lens module and configured to output image light formed by the image forming device; and a meta-waveguide configured to transfer the image light output from the image projector, to an observer's field of view, the meta-waveguide including waveguide element configured to totally reflect light inside, an input coupler including a plurality of first nanostructures forming a first phase gradient in a first direction and configured to couple the image light from the image projector to an inside of the waveguide element, and an output coupler including a plurality of second nanostructures forming a second phase gradient in a second direction different from the first direction and configured to output the light coupled to the inside of the waveguide element by the input coupler, to an outside of the waveguide element.

The invention relates to a linear laser device using a super-structure lens, which belongs to the field of lasers and comprises a VCSEL (Vertical Cavity Surface Emitting Laser) light source and the super-structure lens, the super-structure lens comprises a structure area and a protection area arranged around the structure area, the structure area is composed of a plurality of super-structure lens units, and each super-structure lens unit is composed of a substrate and a micro-nano structure layer arranged on the substrate. According to the linear laser device, linear laser emission can be realized without adding a collimating lens behind the divergent light source.

The invention discloses a vector vortex super lens for directional selective edge detection and an imaging system with the vector vortex super lens, and the vector vortex super lens comprises a substrate and a nano-structure unit on the substrate. The nano-structure units are arranged on the substrate according to specific phase distribution to form a nano-structure unit array; x-line polarized light carrying sample information passes through the vector vortex super lens to generate left-handed and right-handed emergent light, the two paths of emergent light are superposed to obtain an edge image carrying polarization information, and a vector edge detection function is realized. The vector vortex super lens provided by the invention has the edge extraction capability of dynamic adjustment as required, and can realize real-time directional edge detection only by rotating the polarization analyzer without other hardware modification or digital post-processing.

The utility model provides a super lens for dodging and a dodging emitting device comprising the same. The super lens comprises a substrate and a micro-nano structure arranged on the substrate, the super lens is used for modulating the received light beam so as to form a homogenized light spot on a target plane; the micro-nano structures are anisotropic, and the absolute value of the difference value between the rotation angles of two adjacent micro-nano structures on the super lens is larger than a preset threshold value. According to the invention, the geometric phase of the super lens is designed through the GS algorithm, so that the phase distribution of the super lens is more random, the rotation angles of the adjacent micro-nano structures differ greatly, that is, the same-polarization phase of the super lens is more disordered, the same-polarization emergent light does not become zero-order, and the homogenization effect on the light beam is improved.

The invention provides a broadband achromatic super lens based on a cross structure double-layer medium. The lens is composed of three layers of structures which are a dielectric layer, a cross-structure alpha-Si array layer and a cross-structure TiO2 array layer from bottom to top in sequence. The double-layer medium shows an approximately linear smooth phase gradient, completely covers a 2pi phase interval, and effectively reduces the aspect ratio to 4: 1. The phase modulation capability of the cross-structured double-layer dielectric arrays with different sizes is obtained through scanning, and the optimal matching of actual phase and theoretical phase contours is carried out, so that the super lens can realize an achromatic function in a target wave band. In addition, the antenna also has the advantages of polarization insensitivity, broadband operation, easy integration and the like. Therefore, a new device design thought is provided for a wide-spectrum imaging and virtual reality / augmented reality optical display system.

The application provides a design method of a bifocal self-correcting focal point scanning superlens, and belongs to the technical field of optical element manufacturing, and comprises the following steps: determining design parameters of the superlens; using a checkerboard strategy to reduce the design parameters of the superlens, and designing independent focal points in the superlens by means of rotating a single-layer super surface; using isotropy in an artificial atom library to establish a phase distribution library of the superlens; using a Jones matrix to optimize the phase distribution of the superlens according to the phase distribution library, and determining the spatial position of a focal point in a target unit structure; and according to the spatial position of the focal point in the target unit structure, a bifocal self-correcting focal point scanning superlens is designed through full-wave simulation and theoretical analysis verification. The superlens designed by the method can realize independent scanning of multiple focal points and multiple profiles, and provides a theoretical and practical application basis for the fields of industrial design, three-dimensional modeling, scanning and surface detection.

The invention provides a large-view-field continuous zooming super lens system and a design method thereof.The super lens system comprises an adjustable aperture, a first super lens, a second super lens and a driving mechanism which are sequentially arranged in the optical axis direction, and the rear surface of the first super lens is provided with a first super surface; the front surface of the second super-lens is correspondingly provided with a second super-surface facing the first super-surface, the adjustable aperture is configured to be capable of moving along the optical axis direction and adjustable in clear aperture, and the first super-lens and / or the second super-lens are / is configured to be capable of rotating around the optical axis. The distance between the adjustable aperture and the first super lens in the optical axis direction changes along with the change of the focal length, and the driving mechanism drives the adjustable aperture to move, adjusts the clear aperture of the adjustable aperture and drives the first super lens and / or the second super lens to rotate. According to the super-lens system, near-diffraction-limit imaging performance is achieved in the full-focus section, the edge imaging quality is high, and high-quality imaging is achieved.

The invention relates to the technical field of optical instruments, and provides a dimple telescope system based on a double-phase regulation and control super lens and a design method thereof, and the dimple telescope system comprises an objective lens, an eyepiece, a first super lens and a second super lens. The first super lens is arranged at the imaging plane position of the objective lens, is a local phase modulation type super lens and is used for implementing local phase modulation on an imaging area; and the second super lens is arranged at the pupil entrance plane position of the eyepiece, is a continuous phase type super lens, and is used for performing phase compensation and wavefront matching on the wavefront passing through the eyepiece. According to the invention, the double-phase collaborative design of the image plane local phase modulation superlens and the entrance pupil plane continuous phase compensation superlens is introduced into the Galileo telescope system, so that the unification of local high-resolution fovea imaging in the view field and the stability of the full-view-field image quality is realized on the premise of not changing the original optical path structure; and the aberration interference problem caused by local modulation of a single super lens is avoided.

An integrated semiconductor photodetector and its fabrication method are disclosed, relating to the field of integrated photodetector technology. This invention addresses the problems of existing detectors, such as limited functionality, insufficient responsivity, low integration, and difficulty in achieving synergistic miniaturization and high performance improvement. The method involves depositing a Cr conductive layer on the front side of a superlens substrate, uniformly coating the conductive layer surface with photoresist, pre-baking to prepare a dot-matrix mask pattern, developing and fixing followed by Ni deposition, and then stripping to obtain the Ni dot-matrix mask. ICP etching is used to remove the surface conductive layer, and a nanopillar array superlens structure is then fabricated. A photodetector layer is transferred to the back side of the substrate. Positive photoresist is spin-coated onto the substrate surface, pre-baking to prepare a source / drain electrode pattern, developing and fixing followed by sequential deposition of an adhesion layer metal and an electrode body metal layer. The metal layer in the non-electrode region is then stripped to obtain the metal electrode in contact with the photodetector layer, completing the detector fabrication. This invention can be applied to polarization imaging, space remote sensing, airborne detection, and optical communication.

The utility model relates to a Micro-LED collimation system based on a metasurface, and belongs to the field of optical elements, the Micro-LED collimation system based on the metasurface comprises a Micro-LED and the metasurface, the metasurface is composed of a medium optical filter and a collimation super lens, the collimation super lens is arranged at the downstream of the medium optical filter, and the collimation super lens is composed of a substrate, a microstructure and a protection layer. According to the invention, crosstalk between the Micro-LED adjacent arrays is reduced through the angle optical filter, light with a small angle is collected into the super lens, and stray light forming crosstalk can be filtered at the same time. And the light with a smaller angle can be further collimated through the super lens, so that a better result can be obtained.

The invention discloses an infrared super lens with a moth eye imitating anti-reflection nano structure. The moth-eye anti-reflection metasurface, the metasurface lens and the substrate are all made of silicon materials, and the moth-eye anti-reflection metasurface and the metasurface lens are micro-nano-scale arrays and are located on the two sides of the same substrate respectively. According to the invention, the metasurface is fully utilized to finely and efficiently modulate the phase, amplitude and other characteristics of light waves, the moth-eye metasurface changes the effective refractive index of the surface and reduces the reflectivity of incident light on the silicon surface, the metasurface lens enables the phase distribution to meet the spherical wavefront contour, efficient focusing of emergent beams is realized, and the light quality is improved. All micro-nano structures have the advantage of good thermal stability based on the same substrate material, and anti-reflection and focusing effects are achieved in an extremely thin scale.

Described is camera focusing including lens centration estimation using variable focal length phased metalenses. Camera modular alignment and test (CMAT) equipment checks the modular transfer function (MTF) performance of lenses and an image sensor. The CMAT equipment positions a variable focal length phased metalens between the lenses and the image sensor. The metalens includes multiple segments that provide a variable focus depending on distance and angle from boresight of the image sensor. By measuring optical characteristics of the lenses at two opposing segments of the metalens, defocusing effects and a lens centration tilt vector can be computed. Repositioning the lenses to align the centration tilt vector with the boresight of the image sensor improves the MTF performance. A final camera assembly with lenses in precise alignment with the image sensor can be produced, which may improve production output by increasing pass rate at an end of line tester.

This application provides a lightweight imaging probe and imaging device using a superlens, relating to the field of nonlinear optical imaging. By employing a split structure, a miniaturized imaging probe is achieved. During imaging, the imaging probe can be fixedly connected to the object being imaged. Excitation light is used to induce nonlinear optical effects within the object, thereby acquiring optical signals reflecting the internal structure of the object. Specifically, this application ensures that the laser is precisely focused on a specific position within the object corresponding to the scanning angle through a coordinated optical path design of the scanning galvanometer, scanning lens, and objective lens. This effectively triggers nonlinear optical effects while ensuring efficient acquisition of optical signals, thus providing a reliable technical foundation for high-resolution internal imaging. Furthermore, this application uses a superlens structure to construct the objective lens, avoiding the weight and weight associated with traditional optical objectives, thereby achieving a lightweight imaging probe, reducing the impact on the object being imaged, and obtaining more accurate images.

The application provides an orbital angular momentum and wavelength dual multiplexing polarization sensitive zooming super lens based on an orbital angular momentum and wavelength dual multiplexing polarization sensitive zooming super lens, characterized in that the super lens is composed of a silicon dioxide substrate layer and a silicon elliptical nanometer column medium layer. Through an orbital angular momentum topological charge number orthogonality and wavelength selectivity dual multiplexing mechanism, combined with a polarization sensitive design, a geometric phase regulation mechanism, the silicon elliptical nanometer column array is optimized through size and rotation angle, 0-2pi full phase coverage is realized, different orbital angular momentum modes, different wavelengths and left-handed / right-handed circularly polarized incident light are precisely demultiplexed in a 400-700nm visible light band, multi-channel independent zooming can be realized, and the focusing efficiency is greater than or equal to 65%. The application solves the defects of single zooming function, limited channel capacity and poor polarization compatibility of the traditional super lens, has compact structure and high integration, and can be widely applied to the fields of miniature imaging systems, optical communication, holographic display and the like.

The invention discloses a multilayer composite super-structure lens based on optical admittance theory optimization. The multilayer composite super-structure lens comprises a substrate, a transition film layer and a nanometer unit array. The substrate, the transition film layer and the nano unit array are sequentially arranged to form a multi-layer composite super-structure lens; the nanometer unit array is composed of a plurality of nanometer units. According to the multi-layer film structure enhanced transmission type super-structure lens, a nanometer unit is of an Al2O3 (medium refractive index), TiO2 (high refractive index) and MgF2 (low refractive index) laminated structure, a substrate is made of SiO2, and the double faces of the substrate are plated with MgF2 and H4 (titanium-lanthanum mixture) alternating film layers. The result shows that the transmissivity at the designed wavelength of 600nm reaches 89.31%, the transmissivity at the waveband of 500-700nm is higher than 74%, and the average transmissivity reaches 82.01%.

The invention discloses a high-performance infrared focal plane detector based on a super-structure lens effect, and belongs to the technical field of photoelectric detection. The core of the invention lies in providing a novel detector architecture which carries out integrated collaborative design on metal microcavity resonance and a super-structure lens condensation effect at a pixel level. Multi-physical field collaborative optimization is carried out on a quantum well material, a metal microcavity structure and an array period, so that periodically arranged detector pixels simultaneously have dual functions of microcavity resonance frequency selection and microlens wavefront regulation and control. On one hand, incident infrared light is converged through a super-structure lens effect induced by an array period, and the energy density of a light field is enhanced; on the other hand, incident light coupled into the metal microcavity can excite a resonance mode in the microcavity, and the active area light field is further locally strengthened. According to the invention, additional optical elements are not needed, the process is completely compatible with the existing focal plane technology, and a brand new technical approach is provided for high-performance narrow-band infrared detection.

This application provides a superlens-based optical communication system, comprising: a superlens; an optical communication element; and a distance between the superlens and the optical communication element along the optical path propagation direction greater than or equal to one focal length of the superlens; the superlens is used to modulate the received light beam and output the modulated light beam. This application enables the coupling operation of the light beam in an optical communication system using a single superlens, improving the coupling efficiency of the light beam, increasing the light energy utilization rate, and reducing the production cost and size of the optical communication system.