1156 results about "Micro lens array" patented technology

A multispectral light field imaging system includes a primary lens, a microlens array, a first relay lens, a dichroic lens, a second relay lens, a third relay lens, a first image sensor, a first filter, a second image sensor and a second filter, wherein the microlens array is located at an image plane of the primary lens; the first relay lens together with the second relay lens and the third relay lens forms a 1:1 relay lens group imaging system on a spectral band 1 light path and a spectral band 2 light path respectively; the dichroic lens forms an included angle of 45° with a light axis; the first image sensor is located at a focal plane of the second relay lens, and the second image sensor is located at a focal plane of the third relay lens.

The invention provides a transmitting-receiving coaxial laser radar optical system, and relates to the technical field of laser radars. The optical system comprises a transmitting assembly, a polarization splitting prism, a quarter-wave plate, a common beam expanding lens group, a micro-lens array, a common lens and a receiving assembly which are arranged in sequence. Laser emitted by the emitting assembly enters the polarization splitting prism, and at the moment, a light beam is linearly polarized light, can pass through the polarization splitting prism and then pass through the quarter-wave plate to reach the shared beam expanding lens group to be collimated and expanded, and finally is emitted for illumination through the micro-lens array and the shared lens; the emergent laser beam is irradiated to an object to return an optical signal, and the returned optical signal is returned to the polarization splitting prism along an original optical path and is reflected into the receiving assembly to be received and processed; according to the invention, the beam splitter prism, the beam expander group and the micro lens array are shared, and the shared lenses are the same and share the lens group, so that the purpose of saving the manufacturing cost of the laser radar is achieved; the method is suitable for automobile automatic driving, distance detection and the like.

The invention discloses a medium-wave infrared pixel-level spectral polarization optical system, which belongs to the field of lenses and comprises a refraction lens group, a cold diaphragm, a super-structure micro-lens array and a medium-wave infrared quantum dot detector which are sequentially arranged along an incident light path, the super-structure micro-lens array comprises an object side micro-structure and an image side micro-structure; the image side microstructure is used for realizing focusing; the object side microstructure comprises a plurality of object side units which are periodically distributed; each object side unit comprises a polarization metal wire grating structure and a plurality of metasurface-microcavity structures; the polarization metal wire grating structure is formed by arranging metal wire gratings according to different directions so as to realize detection of different orthogonal polarization states; the metasurface-microcavity structure comprises a middle dielectric layer, distributed Bragg gratings located on the two sides of the middle dielectric layer and a metasurface columnar structure unit array embedded into the middle dielectric layer, and the metasurface columnar structure unit array is used for achieving filtering of light of different wave bands. The system has the advantages of good imaging quality, small size, real-time imaging and the like.

The invention relates to the field of spectral imaging, in particular to a double-step Fabry-Perot interference snapshot imaging spectrometer, which comprises a telescopic system, a micro lens array, a Fabry-Perot array interference system and an area array detector, and is characterized in that the telescopic system is used for collecting a target light field and carrying out view field limitation and collimation on the target light field; the Fabry-Perot array interference system is used for modulating a target light field into an interference light field array, the Fabry-Perot array interference system comprises two step lenses which are orthogonal in the step direction, the highest steps of the two step lenses are tightly attached, and an air gap with the thickness changing in a checkerboard-shaped two-dimensional increasing mode is formed between the two step lenses; the microlens array is used for imaging the interference light field array onto the area array detector through each imaging channel; and the area array detector is used for receiving the transmission image field of the microlens array to obtain an interference image array. The invention has the advantages of small volume, light weight, compact structure, static state, stability, reliability and the like.

The embodiment of the invention provides an optical detection device which comprises an imaging assembly and a photoelectric detection device, and the imaging assembly is used for forming an image on an image plane of a to-be-detected area of a wafer. And the photoelectric detection device is used for receiving images and is arranged at the image plane. The photoelectric detection device comprises a light beam separation assembly and a sensor assembly, the light beam separation assembly is used for dividing a continuous first light signal in an image into multiple beams of second light signals, and the light beam separation assembly comprises a microlens array. The sensor assembly is used for receiving multiple beams of second optical signals, and each pixel unit of each sensor in the sensor assembly is used for receiving one beam of second optical signal in the multiple beams of second optical signals. The sensor assembly comprises a single-pixel sensor, and the single-pixel sensor corresponds to one micro lens in the micro lens array; and / or, the sensor assembly comprises a multi-pixel sensor, the multi-pixel sensor corresponds to a plurality of microlenses in the microlens array, and spatial segmentation is beneficial to improving the signal-to-noise ratio.

The invention discloses a peripheral visual area defocused long-distance imaging optical system, and the system comprises a defocus panel which is located right above an observed object, and comprises a flat plate region and a micro-lens array region; the flat plate area is used for directly transmitting light emitted by an observed object; the micro-lens array area is used for carrying out first imaging on the peripheral area of an observed object to form a real image; the objective lens is positioned right above the defocus panel, and is used for performing first imaging on the observed object to form a virtual image of the observed object, receiving a real image of a peripheral area of the observed object, and performing second imaging to form a virtual image of the peripheral area of the observed object; the eyepiece is located right in front of the human eyes and used for conducting secondary imaging on the observed object, forming an amplified long-distance virtual image in front of the human eyes, receiving a virtual image of the peripheral area of the observed object and forming a real image in front of the peripheral retina in the human eyes. And the purpose of preventing and controlling myopia is better achieved.

The invention is suitable for the field of imaging, and discloses a micro lens array zoom module zoom method and an imaging system, and the method comprises the steps: obtaining a mapping relation table between a deviation objective lens working distance and a micro lens array state of a micro lens array zoom module; acquiring a laser spot image formed by irradiating the to-be-measured object with laser, and calculating the position of the to-be-measured object to the focal plane of the objective lens; determining an adjustment reference distance of the micro-lens array zoom module based on the position from the object to be measured to the focal plane of the objective lens, and comparing the adjustment reference distance with the mapping relation table to determine the micro-lens array state of the micro-lens array zoom module; and on the basis of the determined state of the microlens array, a focusing instruction is generated so as to realize automatic zooming of the microlens array zooming module, automatic zooming of the microlens array zooming module is realized, and the method has the advantages of extremely high focusing speed and high precision.

The invention discloses a high-refractive-index nano-composite optical adhesive and a preparation method thereof, and belongs to the technical field of optical transparent adhesives. The optical adhesive is prepared by taking a polyurethane acrylate oligomer with a specific structure as matrix resin, introducing surface-modified barium titanate and zirconium oxide core-shell nanoparticles as a functional filler, and matching with an active diluent, a photoinitiator and a silane coupling agent in a specific proportion. Through the design of the core-shell structure, the core problems that the high-refractive-index nanoparticles are easy to agglomerate in an organic resin matrix, the dispersion stability is poor and the bonding force with a matrix interface is weak are effectively solved. The prepared optical adhesive has a refractive index of more than 1.65, a light transmittance of more than 99% and a haze of less than 0.3% after being cured, has excellent bonding strength, weather resistance and long-term use stability, and is especially suitable for precise lamination of high-end display devices (such as OLEDs (Organic Light Emitting Diodes) and micro-lens arrays).

The invention discloses an imaging film based on a Fresnel lens micro image-text array structure, and the film is characterized in that the film comprises a transparent film substrate; the composite structure micro-focusing element array layer is arranged on one surface of the transparent film substrate and comprises a plurality of composite structure micro-focusing element units, and each composite structure micro-focusing element unit is obtained by performing Fresnel lens on a micro image-text array, so that a Fresnel lens micro image-text array structure is formed; an ultraviolet adhesive layer is arranged between the adjacent composite structure micro focusing element units, and the ultraviolet adhesive layer is higher than the Fresnel lens micro image-text array structure; and the reflecting film layer covers the surface of the Fresnel lens micro image-text array structure. The imaging thin film is large in visual angle and thin in thickness, the Fresnel micro lens array and the micro image-text array form a composite structure, the technological process is optimized, the production cost is reduced, and a thin film type imaging device with ultra-thin and flexible characteristics can be achieved.

The invention discloses a photoresist micro-lens array preparation method and system, and relates to the field of micro-nano optical device manufacturing. The preparation method of the photoresist micro-lens array comprises the following steps: carrying out chemical mechanical polishing treatment on a silicon wafer, spin-coating photoresist on a substrate to form a cylindrical array, and eliminating solvent gradient through pre-drying; forming a fluorocarbon nano film on the surface of the photoresist through plasma deposition so as to reduce the surface energy of the photoresist; realizing hot reflux of the photoresist based on gradient annealing, wherein the gradient annealing comprises a preheating section, a main reflux section and a stable section; on the basis of the preheating section, glass transition stress is avoided, fluorine-containing gas and inert gas are synchronously introduced into the main backflow section to act on a plasma sheath layer, so that the flowing direction of photoresist is regulated and controlled, and the edge coffee ring effect is inhibited; the stable section synchronously performs plasma assistance to lock the shape; and the precision and the consistency of the micro-lens array are improved through segmented temperature regulation and control and a plasma auxiliary technology.

The invention provides an optical cross system based on silicon-based liquid crystal and a control method, and relates to the field of optical elements, and the optical cross system comprises an optical fiber array, a micro lens array, a collimating lens, a polarization conversion module, a dispersion element, a focus lens group and a liquid crystal spatial light modulator. Optical signals are coupled through the micro-lens array, a divergence angle is compressed, and parallel light beams are formed through the double-agglutination collimating lens; the polarization conversion module separates the light beam into P / S polarized light and unifies the polarization state; the dispersion element separates light beams according to wavelength space, and the focus lens group forms an elliptical Gaussian light spot on the liquid crystal spatial light modulator; the liquid crystal spatial light modulator divides a light spot into a plurality of independent control areas in the long-axis direction, and single-wavelength multi-port output, power proportion regulation and control and monitoring signal extraction are achieved by dynamically modulating the reflection phase of each area. The control method comprises the steps of optical path processing, regionalized phase modulation and real-time monitoring feedback. According to the invention, flexible routing, power balance and lossless monitoring of wavelength channels can be realized.

The invention relates to digitized light spot laser processing equipment and application thereof. The digitized light spot laser processing equipment comprises a laser processing lens and a thermal imager which are arranged in a matched mode. The laser processing lens is used for accessing laser beams of an array through a light inlet, performing collimation processing through a collimation module, performing output light spot regularization processing on each laser beam through a micro-lens array homogenizing and shaping module, and outputting processed array laser spots through a light outlet; a controller is arranged in cooperation with the laser beam of the laser generation array and the thermal imager; the controller adjusts the partition output of the laser generation array based on a feedback signal of the thermal imager; the lens is applied to laser processing of components with symmetric heat transfer characteristics and asymmetric heat transfer characteristics. According to the method, the surface temperature uniformity of a complex component can be ensured, the surface hardness of a workpiece and the uniformity of tissue distribution are improved, meanwhile, the method is suitable for various machining devices, light spot energy of all units is evenly distributed, and independent control over the light spot energy of the units is achieved through an external controller.

The invention belongs to the technical field of LED display screens, and particularly relates to an LED display module and a display screen. The LED display module comprises a substrate, a plurality of LED light-emitting chips arranged on the substrate, transparent packaging layers arranged among the LED light-emitting chips and on the upper surfaces of the LED light-emitting chips, a black light-transmitting adhesive film layer arranged on the transparent packaging layers, and a micro-lens array layer arranged on the black light-transmitting adhesive film layer. The micro lens array layer comprises a micro lens array base layer and a micro lens array arranged on the micro lens array base layer. Compared with the prior art, the surface of the LED display module provided by the invention is the micro-lens array layer which is of the curved surface structure, so that the internal total reflection phenomenon when light is emitted into air from the module packaging structure can be effectively reduced, and the light emitting efficiency is improved, so that the ink color consistency can be effectively improved through the black light-transmitting adhesive film layer; and the light emitting efficiency can be improved through the compound eye micro lens array, and the brightness is improved under the condition that the power of the module is not increased.

Disclosed in the present invention are a multispectral light field imaging system, and a three-dimensional temperature field measurement method and measurement system. The multispectral light field imaging system comprises: a primary lens, a micro-lens array, a first relay lens, a dichroic mirror, a second relay lens, a third relay lens, a first image sensor, a first optical filter, a second image sensor and a second optical filter, wherein the micro-lens array is located at an image plane of the primary lens; the first relay lens, the second relay lens and the third relay lens together form a 1:1 relay lens group imaging system on an optical path of a spectral band I and an optical path of a spectral band II; an angle of 45° is formed between the dichroic mirror and an optical axis; and the first image sensor is located at a focal plane of the second relay lens, and the second image sensor is located at a focal plane of the third relay lens. The present invention realizes the collection of multispectral light field data while maintaining the amount of light field data of each spectrum unchanged, such that an instantaneous three-dimensional temperature field of a flow field can be measured.

The invention relates to the field of light field imaging, in particular to a light field camera calibration method based on original light field image line feature detection, which comprises the following steps: acquiring a white background original light field image set of a light field camera under different shooting conditions, and processing to obtain projection center grid data of a microlens array; obtaining a checkerboard original light field image set of the light field camera under different shooting conditions, and loading projection center grid data of the micro-lens array on each checkerboard original light field image; calculating a gradient value of each pixel in each checkerboard original light field image, queuing the gradient values of the pixels, and performing region diffusion and model fitting according to a gradient angle similar direction to obtain line features in each checkerboard original light field image so as to calculate angular point coordinates of each checkerboard original light field image; and constructing a light field camera projection model, and calibrating parameters of the light field camera in combination with the angular point coordinates. According to the method, introduced errors are reduced while time is saved.

The invention relates to the technical field of target distance detection and 3D scanning reconstruction, and discloses a coaxial scanning type ultra-long distance detection laser radar system, which comprises a laser light source module, which adopts a 1550nm optical fiber laser to output high-power laser, and ensures sufficient laser energy and human eye safety; according to the invention, by adopting the high-power 1550nm fiber laser, the ultra-long distance detection is realized on the premise of ensuring the safety of human eyes, and the detection range of more than 10km can be reached, so that the limitation that the detection distance of the traditional laser radar is only 500m is broken; according to the invention, by selecting the 1550nm laser device which is safer to human eyes and greatly improving the laser power to kilowatt and even myriawatt levels, stronger echo signals are realized, so that the detection signal-to-noise ratio is remarkably improved; the micro-lens array is adopted to replace a traditional DOE diffractive optical element, efficient beam shaping of a one-dimensional or two-dimensional dot matrix is achieved through flexible regulation and control of the curvature radius and the distance of the micro-lenses, meanwhile, the manufacturing cost is reduced, and the design freedom degree is expanded.

The invention discloses a Micro-LED light extraction structure, which relates to the field of photoelectricity and comprises first glass for bearing the light extraction structure, a photoresist curing film layer which is arranged on the first surface of the first glass structure and is imprinted and cured by a PDMS template, and a micro lens array arranged on the second surface of the first glass structure, and the surface of the micro-lens array is matched with the PDMS template to be subjected to surface roughening through a nanoimprint process. Meanwhile, the invention further discloses a preparation method of the Micro-LED light extraction structure. According to the invention, a set of PDMS template is adopted to respectively carry out roughening treatment on the glass surface and impressing transfer roughening treatment on the lens surface, so that the light emitting rate is improved, and the light extraction rate of the whole Micro-LED is effectively improved.

A camera module includes an imaging lens assembly module and an image sensor. The image sensor is disposed on an image surface of the imaging lens assembly module and includes a photoelectric converting layer, a micro lens arrays layer, a light filtering layer and an anti-reflecting layer. The photoelectric converting layer is for converting a light signal to an electric signal. The micro lens arrays layer is for converging an energy of the imaging light into the photoelectric converting layer. The light filtering layer is for absorbing a light at a certain wavelength region of the imaging light. The anti-reflecting layer is disposed on a surface of at least one of the light filtering layer and the micro lens arrays layer and includes an irregular nano-crystallite structure layer and an optical connecting layer. The optical connecting layer is connected to the irregular nano-crystallite structure layer.

The invention discloses an indoor light control method and system based on the Internet of Things, and relates to the technical field of intelligent lighting control, and the method comprises the steps: collecting indoor spectrum distribution data through a spectrum analyzer, constructing a spectrum feature fingerprint database through an edge calculation unit, and carrying out the matching and classification of spectrum feature fingerprints based on distributed calculation nodes; the spectral feature fingerprints are input into a preset optical physiological mapping model, a spectral compensation sequence is generated, and the spectral compensation sequence comprises target output proportions of spectrums with different wavelengths; and converting the spectrum compensation sequence into an indoor illumination control instruction, executing the indoor illumination control instruction through the RGBW multi-color LED array and the micro-lens array, and adjusting the illumination environment of each indoor area. According to the invention, accurate perception and intelligent regulation and control of a complex light environment are realized, and the intelligent level of indoor illumination and the user experience are improved.

The invention provides AR glasses based on integrated imaging three-dimensional display. According to the AR glasses, the integrated imaging technology is adopted, a three-dimensional light field is reconstructed through the micro-lens array, and multi-view three-dimensional image display is achieved. The display module adopts a Micro-LED display screen and is combined with a micro-lens array to realize superposition of a virtual image and a real scene. The optical waveguide system uses a holographic waveguide or a free-form surface optical device to guide virtual image light to the visual field of a user, so that the equipment is light and the display definition is ensured. Meanwhile, the system is provided with a head tracking and parallax adjusting module, and an inertial measurement unit (IMU) and an external camera are used for tracking the head movement of a user in real time, dynamically adjusting three-dimensional image display and ensuring the consistency of a virtual image and a real scene. According to the design, through precise matching of the display screen and the micro lens array, high-quality reconstruction of a three-dimensional image is ensured, and the cruising ability of equipment is improved by optimizing power consumption management.

The invention discloses an optical quasi-three-dimensional space converter which can convert a three-dimensional space into a large number of fixed-position two-dimensional real images with different object image distance related parameters. The optical quasi-three-dimensional space converter comprises a zoom long-focus lens, a short-focus micro lens array and an object image distance related parameter regulator; one of the two lenses is used for receiving light from an object space and imaging the light into an intermediate image; one is used for converting the intermediate image into a virtual image or a real image of a three-dimensional space; the intermediate image horizontal turner turns the intermediate image left and right in the horizontal direction for real image space conversion; and the object image distance related parameter regulator is used for regulating the focal lengths of the zoom long-focus lens, the short-focus micro lens array and the pick-up lens and the relative positions of the lenses. The optical quasi-three-dimensional space converter can be used for a wide-field-of-view three-dimensional camera, a wide-field-of-view three-dimensional projector for naked eye observation, a three-dimensional optical processing machine, artificial eyes and the like.

The invention discloses a Micro-LED chip array integrated with a homogeneous micro-lens array and a preparation method thereof, and the method comprises the steps: carrying out the wafer-level precise bonding of a Micro-LED light-emitting pixel array and a CMOS drive circuit substrate, removing a substrate, integrating a homogeneous pixel-level GaN micro-lens array on a GaN-based pixel array through the photoetching, hot melting backflow and dry etching technologies, and carrying out the precise bonding of the micro-LED light-emitting pixel array and the CMOS drive circuit substrate. And finally, realizing the full-pixel common cathode conduction of the Micro-LED chip by adopting a metal interconnection process. According to the method, the Micro-LED pixel array and the micro-lens array are homogeneously integrated, are made of the same material and have no refractive index difference, so that no Fresnel loss exists on an interface, and the light extraction efficiency of a chip is improved. In addition, the method is simple in manufacturing process, low in cost, good in chip structure reliability, high in stability and suitable for being applied to industrial chip manufacturing.

The invention relates to the technical field of precision and ultra-precision machining, and discloses a CO2 full-laser machining device and method for a fused quartz micro convex lens array. The three-axis motion platform is arranged on the supporting platform; the pulse CO2 laser is used for generating a processing laser beam; the light beam transmission system sequentially comprises a light beam combining module, a light beam adjusting module, a light splitting module, a light beam guiding module, a scanning galvanometer and a focusing field lens along a laser beam path; the main light beam is guided to the scanning galvanometer through the light beam guiding module and is emitted to a fused quartz workpiece after being focused through the focusing field lens; the contour detection unit is used for taking morphology data of the micro-lens array in situ; the temperature monitoring unit is used for measuring the temperature of the processing area; the control unit is connected with the three-axis motion platform, the contour detection unit, the temperature monitoring unit and the pulse CO2 laser, and is used for adjusting the laser power and the displacement of the three-axis motion platform according to detection data; the device has the characteristics of high efficiency, high precision, non-contact processing and small heat influence.

The invention discloses an all-solid-state snapshot full-Stokes parameter measurement and imaging enhancement sensor device. The all-solid-state snapshot full-Stokes parameter measurement and imaging enhancement sensor device comprises a micro-lens array module, a liquid crystal phase modulation module, a polarization wire grating array module and an image sensor module. The micro lens array module is composed of a plurality of micro lenses which are arranged in a two-dimensional mode, and incident light is focused on the photodiode of each pixel. The liquid crystal phase modulation module is composed of two high-speed liquid crystal variable phase delayers, and active phase modulation is carried out on the polarization state of incident light. Polarized light information in four polarization directions can be obtained only through single shooting in the polarization wire grating array module. The image sensor module calculates the full Stokes parametric polarization characteristics of the incident light. According to the invention, full-polarization information measurement of incident light can be realized only through single exposure, and a polarization enhancement mode is switched after measurement is completed, so that the imaging efficiency of the sensor in dark light scenes such as weak contrast target detection is greatly improved.

Disclosed is a linear array scanning Brillouin scattering elastic imaging device. In the device, a signal generating system consists of a narrow linewidth continuous wave laser, a half-wave plate, a beam expander, a Y-direction scanning galvanometer, a microlens array, a pinhole array filter, a first plano-convex lens, a polarization beam splitter, a quarter-wave plate and a microscope objective. A signal receiving system consists of a microscope objective, a quarter-wave plate, a polarization beam splitter and an eight-channel optical collimator array. Each channel of an eight-channel spectrometer consists of an optical collimator, a convex lens, a scanning Fabry-Perot interferometer, a photomultiplier tube and an eight-channel photon collection card.

The invention discloses a VCSEL array and multi-core optical fiber high-efficiency coupling and aligning system, and belongs to the field of semiconductor lasers. The VCSEL array and multi-core optical fiber high-efficiency coupling system comprises a VCSEL array, a micro lens array and a multi-core optical fiber. A layer of microlens array is arranged between the VCSEL array and the multi-core optical fiber, and divergent light beams emitted by the VCSEL array are focused through the microlens array, so that the light beams can be respectively aligned with each fiber core of the multi-core optical fiber for incidence. The invention further discloses a VCSEL array and multi-core optical fiber alignment system, on the basis of the VCSEL array and multi-core optical fiber high-efficiency coupling system, the system further comprises a CCD camera, a high-magnification visual system and piezoelectric motors, the VCSEL array, the micro-lens array and the multi-core optical fiber are fixed in the three piezoelectric motors respectively, the plane where the piezoelectric motors are located is an x-y plane, and the plane where the piezoelectric motors are located is an x-y plane. A CCD camera is placed at the position parallel to the x-y plane, image information of the VCSEL array, the micro-lens array and the multi-core optical fiber is captured, and machine vision automatic alignment is carried out.

The invention belongs to the technical field of eye vision optics, and relates to a microstructure optical imaging element design method and a microstructure optical imaging element, and the method comprises the steps: building a microstructure lens three-dimensional model under different rise variations based on the structure parameters of a mother lens and the structure parameters of a negative microlens array under different rise variations; acquiring modulation transfer function curves of the optical system containing the three-dimensional models of the microstructural lenses and spatial frequencies of first minimum value points on the modulation transfer function curves; fitting the spatial frequencies of all the first minimum value points and the corresponding rise variations to obtain a relation equation of the spatial frequencies of the minimum value points and the rise variations; based on the relation equation of the spatial frequency of the minimum value point and the rise variation, the spatial frequency limit value when the imaging contrast of the microstructure lens is lower than the preset minimum contrast when the rise variation is infinite is obtained, so that the threshold value range of the rise variation is obtained, and a theoretical basis is provided for the design of the microstructure lens based on negative refractive power.

The present application provides a defocused eyeglass with a microlens array, a design method and eyeglasses. The defocused eyeglass with a microlens array comprises a first surface and a second surface opposite to the first surface, a regular polygonal grid area is set outside the clear vision area of ​​the first surface, and a microlens is arranged in each regular polygonal grid. The defocused eyeglass is designed according to the preset energy ratio of the human eye, which can greatly improve the wearer's experience.

A light source a backplane including drive circuits formed thereon, an array of micro-light emitting diodes (micro-LEDs) bonded to the backplane, and an array of micro-lenses on the array of micro-LEDs. Each micro-LED of the array of micro-LEDs includes a mesa structure that includes a p-doped semiconductor layer, an n-doped semiconductor layer, an active region between the p-doped semiconductor layer and the n-doped semiconductor layer, and a dielectric layer underneath the p-doped semiconductor layer or the n-doped semiconductor layer and surrounding the active region. In some embodiments, the center of the active region of a micro-LED of the array of micro-LEDs is horizontally offset from the center of the mesa structure of the micro-LED and the center of a corresponding micro-lens of the array of micro-lenses.

A hyperspectral imaging system is characterized by comprising an imaging unit, an optical fiber scanning device, an optical fiber spectrometer, a data processing unit and a control unit, the imaging unit comprises an imaging lens and a micro-lens array, the imaging lens images a target object onto the micro-lens array, the optical fiber scanning device scans an optical signal processed by the imaging unit, and the optical fiber spectrometer performs spectrum separation on light with different wavelengths in the scanned optical signal to form spectrum data; and the data processing unit processes the spectral data and reconstructs a hyperspectral image of the target object by using the spectral data. And only an important area is scanned point by point in an optical fiber scanning mode, and hyperspectral data acquisition of a local interested target is concerned, so that unnecessary overhead of full-frame data acquisition is greatly reduced. For an application scene needing quick or real-time monitoring, the directional scanning mode greatly shortens the required integral acquisition time, and reduces the overall time delay of the system.