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56results about How to "Large imaging field of view" patented technology
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Method, application, device and system for positioning object step by step based on vision fusion
InactiveCN109448054AAddressing the drop in accuracySmall distortionImage enhancementImage analysisComputer graphics (images)Vision based
The invention discloses a method for positioning object step by step based on vision fusion, comprising collecting a first image containing target feature points to realize the coarse positioning of the target feature points, according to the coordinate information contained in the first image, collecting the second image containing the target feature point information, carrying out the precise positioning, obtaining the coordinate information contained in the second image, and obtaining the target feature point based on the coordinate transformation amount under the same coordinate system according to the conversion relationship between different coordinate systems, and locating the target feature point. At the same time, the invention also discloses an application, device and system forpositioning object step by step based on vision fusion. The scheme separates the positioning accuracy from the condition of large field of view, two different types of cameras are used to realize step-by-step positioning, which solves the problem that the positioning accuracy is insufficient when the workpiece moves in a large range; and when there are many screw holes, there is no need to take photographs repeatedly, which can reduce the number of photographs, improve the production efficiency, and has the advantages of high precision and high positioning efficiency.
Owner:SHENZHEN UNIV
Three-dimensional imaging device for retina
InactiveCN102525406AEliminate aberrationsEliminate non-uniformityOthalmoscopesImage resolutionOptical fiber coupler
The invention discloses a three-dimensional imaging device for a retina. The device consists of a light source component, an interference arm component, a two-dimensional scanning component, a field lens component, a confocal signal detection component and an interference signal detection component. The three-dimensional imaging device for the retina finishes scanning on the retina of a human eye by using the two-dimensional scanning component, extracts a surface image of the retina by using the confocal signal detection component and depth information of the retina by using the interference signal detection component, and jointly finishes the reconstruction of a three-dimension image of the retina through a confocal signal and an interference signal; the system is compact by adopting the design of optical fiber access and an optical fiber coupler; the influence of curvature of field and aberration in the imaging process is reduced through the design of a field lens so as to acquire a large-field-of-view three-dimensional image of the retina of the human eye; and the three-dimensional imaging device for the retina which is compactly designed and is high in imaging resolution and large in imaging field of view is realized, so that the imaging effect of the traditional fundus imaging instrument is greatly improved.
Owner:SUZHOU MICROCLEAR MEDICAL INSTR
Fundus imaging equipment for clinical diagnosis
InactiveCN102885612AOvercome only single shotOvercoming the inability to obtain video fundus imagesOthalmoscopesDiseaseEyepiece
The invention discloses fundus imaging equipment for clinical diagnosis. The fundus imaging equipment for the clinical diagnosis consists of a light source component, a two-dimensional scanning component, a relay lens component, a detector component and a field-of-view target component. According to the fundus imaging equipment for the clinical diagnosis, an observation direction of a patient is fixed by utilizing the field-of-view target component, a retina of a human eye is scanned by using the two-dimensional scanning component, the detector component and an optical amplifier of the detector component optically enlarge a signal reflected by the retina to enhance the signal-to-noise ratio of an image, and a high-resolution image of the retina is acquired through the detection of a confocal signal; according to the fundus imaging equipment for the clinical diagnosis, the influence of field curvature and aberration in an imaging view field is reduced by the special design of a wide-field lens of the relay lens component, and the wide-field imaging of 30 to 60 degrees is realized by adjusting an eyepiece; high-resolution fundus imaging equipment which is compact is design and is applicable to the clinical diagnosis is fulfilled by the schemes of light source fiber input and optical signal fiber output, so that the imaging quality of the traditional fundus photography system is greatly improved, the imaging view field is greatly increased, and the clinical operability of equipment is strengthened; and the fundus imaging equipment for the clinical diagnosis particularly can acquire high-resolution images of retinas of human eyes under the condition that the retinas reflect weak signal light, and is used for the clinical diagnosis of fundus diseases.
Owner:SUZHOU MICROCLEAR MEDICAL INSTR
Four-beam laser three-dimensional imaging optical system based on coaxial three-mirror-anastigmat afocal telescope
InactiveCN105785392ALarge imaging field of viewEnhanced multi-beam detection capabilitiesElectromagnetic wave reradiationICT adaptationTarget surfaceOptoelectronics
The invention discloses a four-beam laser three-dimensional imaging optical system based on a coaxial three-mirror-anastigmat afocal telescope. The four-beam laser three-dimensional imaging optical system is characterized in that: four paths of laser are scattered through a target surface, enter a novel coaxial three-mirror-anastigmat afocal telescope receiving system via four off-axis viewing fields respectively, are reflected through viewing field reflection mirrors, and adopt color separation filters for separating wave bands; and a laser receiving channel can achieve signal acquisition of laser echoes, and an area array imaging channel can achieve shooting of a laser footprint two-dimensional space target, thereby achieving multi-beam laser three-dimensional imaging. The four-beam laser three-dimensional imaging optical system solves the difficulty that multi-beam laser reflection loops share one receiving telescope in the existing laser active detection technology, the large viewing field coaxial three-mirror-anastigmat afocal telescope is adopted, the laser receiving channel and the area array imaging channel are combined by utilizing the off-axis viewing fields, and at least four beams of laser beam echoes can be measured on the layout.
Owner:SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
High precision visual guidance laser tracking method
InactiveCN107272015ARealization scopeAchieve precisionElectromagnetic wave reradiationLaser transmitterThree dimensional measurement
The invention relates to a high precision visual guidance laser tracking method which is realized by a laser tracking device. The laser tracking device consists of a binocular vision measuring system, a rotating double prism system and a laser emitter. The binocular vision measuring system is composed of a first camera, a second camera and a tripod for fixing the position. The rotating double prism system comprises a first rotating prism, a second rotating prism, a supporting structure and a driving device. The laser emitter is used to emit a laser beam. The method of the invention fully combines the advantage that the binocular vision measuring system can carry out three-dimensional measurement in a wide range and the characteristic that the rotating double prism system can realize high precision tracking, and ensures that the laser beam is guided by the binocular vision measurement information quickly and accurately to track a dynamic or static 3D target. In addition, the method can be extended to other areas such as laser vibration measurement, laser welding, laser cutting, laser engraving, laser drilling and surface treatment.
Owner:TONGJI UNIV
An optical fingerprint recognition module and an electronic device
InactiveCN109791613AImprove the accuracy of fingerprint recognitionPrevent dark barsCharacter and pattern recognitionPrismOptical sensing
An optical fingerprint recognition module and an electronic device are provided. The optical fingerprint recognition module includes: an optical sensing element (302) and an optical element (301). Theoptical element (301) has a plurality of optical holes (3011) parallel to each other such that refracted light obtained after light reflected by a ginger is refracted by a prism structure of a backlight module (10) can pass through the optical holes (3011) and enter a sensing area of the optical sensing element (302). Through the optical fingerprint recognition module and the electronic device, the imaging field is enlarged, quality of fingerprint imaging is improved, and fingerprint recognition accuracy is higher.
Owner:SHENZHEN GOODIX TECH CO LTD
Terahertz band imaging objective lens with high relative aperture and large field of view
ActiveCN107092075AAvoid strong absorptionAberration correctionOptical elementsCamera lensOptical axis
The invention discloses a terahertz band imaging objective lens with a high relative aperture and a large field of view, and belongs to the technical field of optical lens imaging. The object of the invention is to provide a terahertz band imaging objective lens with a high relative aperture and a large field of view, to realize the high relative aperture and large imaging field of view. The terahertz band imaging objective lens comprises a terahertz filter, a first lens, a diaphragm and a second lens. The first lens and the second lens are both convex lenses and both have positive focal power. The first lens and the second lens are both made of plastics having an absorption coefficient of less than 0.5 cm-1 in a less than 0.5THz band and a refractive index 1.3 to 2. Both the first lens and the second lens have high-order aspheric surfaces as the front surfaces, the image quality of the whole field of view is well corrected, and the high relative aperture and large imaging field of view are realized. The invention is applicable to an objective lens for terahertz imaging.
Owner:LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
Super-resolution three-dimensional shape measurement method based on optical tweezers dielectric microspheres
ActiveCN108917651AFlexible handlingPrecise control of bead positionUsing optical meansSinusoidal gratingDielectric
The invention discloses a super-resolution three-dimensional shape measurement method based on optical tweezers dielectric microspheres. The dielectric microspheres are taken as a core, an optical tweezers principle is adopted for controlling the dielectric microspheres in an array mode, a three-dimensional space position of the dielectric microspheres is flexibly controlled, and an optimal imaging effect is obtained. Meanwhile, DMD projection sinusoidal grating stripes are used for encoding a dielectric microsphere imaging space, light field distribution characteristics of the dielectric microsphere imaging space are utilized, and a dielectric microspheres coded image modulated by a to-be-measured structure is resolved, so that transverse graph correction and longitudinal height reconstruction are achieved. According to the method, three-dimensional shape measurement of micro-nano devices with the characteristic dimension of less than 100 nm can be realized in a far-field region through a face imaging mode, and meanwhile, the method has the advantages of high flexibility, high resolution, parallelism, fast measurement and the like.
Owner:INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
Tomographic imaging method based on aplanatic super-structured lens
ActiveCN109752842AUltra-thin volume advantageImprove aberrationMaterial analysis by optical meansLensPolarizerSuper structure
The invention discloses a tomographic imaging method based on an aplanatic super-structured lens, namely a chromatographic imaging technology utilizing wavelength coding based on a super-structured aplanatic lens. A light source probe (1), the aplanatic super-structured lens (2), a linear polarizer (3) and a quarter-wave plate can be taken as auxiliary optical elements to be inserted into an imaging system for directly improving a signal-to-noise ratio; a photoreceptor (5) is arranged on the imaging surface and is used for receiving an image; through relatively continuous irradiation of different wavelengths, the image surface information of wavelength coding is acquired, and then the tomographic image information of an object is obtained through a corresponding algorithm. According to themethod, a design principle of a super-structure surface is adopted, and the control of the color difference and the correction of the spherical aberration are realized by utilizing the phase.
Owner:NANJING UNIV
Three-dimensional imaging device and method based on time correlation
ActiveCN106707295AEasing the need for high power light sourcesEasy to getElectromagnetic wave reradiationVisual field lossTime correlation
The invention provides a three-dimensional imaging device and method based on time correlation. The three-dimensional imaging device is formed by a laser, a light intensity modulator, a laser beam-expanding lens, a reception telescope, an area-array detector and an industrial control computer. The three-dimensional imaging method of the three-dimensional imaging device based on time correlation is realized through the following three steps: 1) obtaining two-dimensional image information of an object through single exposure imaging; 2) obtaining elevation information of each image point on the two-dimensional image of the object through multiple exposure detection and time correlation operation; and 3) combining the two-dimensional image information and the elevation information of the corresponding image points to form a three-dimensional image of the object. The method can be used for constructing a large-visual-field, high-resolution and low-cost three-dimension laser imaging radar.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Millimeter wave sparse array remote monitoring imaging method and system
ActiveCN110794471ALarge imaging field of viewElectromagnetic wave flicker effect is smallOptical detectionRadio wave reradiation/reflectionThinned arraySoftware engineering
The invention discloses a millimeter wave sparse array remote monitoring imaging method and system, and belongs to the technical field of millimeter wave three-dimensional holographic imaging. The method comprises the following steps: S1, obtaining an echo signal; S2, performing interpolation operation; S3, performing fast Fourier transform; S4, selecting a distance plane; S5, performing frequencydomain matched filtering; S6, performing fast Fourier inverse transform; S7, performing time domain matched filtering; S8, performing coherent accumulation; and S9, obtaining a three-dimensional complex image. According to the millimeter wave sparse array remote monitoring imaging method and system disclosed by the invention, a millimeter wave sparse array full-electronic scanning imaging systemis adopted, and compared with a traditional optical machine scanning far-field imaging system, the millimeter wave sparse array full-electronic scanning imaging system has the characteristics of smallelectromagnetic wave flicker effect, high image signal-to-noise ratio and large imaging field range; meanwhile, compared with a traditional time domain type imaging method, the adopted signal processing imaging method has the advantages of less hardware resources and less storage space, the algorithm process is simple and easy to understand, the algorithm main body only comprises the main body process of fast Fourier transform, matched filtering and coherent accumulation, and the calculation efficiency is higher than that of the traditional time domain type algorithm.
Owner:博微太赫兹信息科技有限公司
Array reflection type microscopic image acquisition system
PendingCN110365916ARealize microscopic imaging without blind spotsImprove Microscopic Inspection EfficiencyTelevision system detailsMaterial analysis by optical meansMicroscopic imageComputer module
The invention discloses an array reflection type microscopic image acquisition system, which comprises a microscopic camera module array and a receiving end; the microscopic camera module array is located right above a sample table; the microscopic camera module array comprises a plurality of microscopic camera modules which are distributed in an array. Each microscopic camera module comprises a first lens group, a reflective illumination structure, an excitation light source, a second lens group and an image sensor; the first lens group and the second lens group are symmetrically arranged, the image sensor is electrically connected with the receiving end, the excitation light source is located on one side of the reflective illumination structure, and a light source emitted by the excitation light source irradiates the reflective illumination structure. According to the invention, a plurality of areas of a sample can be simultaneously collected, the detection speed is improved, and thesystem is suitable for detecting opaque large-area samples such as silicon wafers, semiconductor microscopes, biological chips, thick biological samples and the like.
Owner:苏州瑞霏光电科技有限公司
Optical imaging system based on beam splitter prisms and ultrahigh frame frequency imaging method
ActiveCN108828895AHighly integratedCompact structureHigh-speed photographyOptical elementsBeam splitterLight beam
The invention discloses an optical imaging system based on beam splitter prisms and an ultrahigh frame frequency imaging method. The optical imaging system comprises an optical system and detector assemblies, wherein the beam splitter prisms are contained in the optical system; after a beam enters into the optical system, the beam is split through the beam splitter prisms in the optical system andis finally imaged on the detector assemblies respectively, simultaneously, the detector assemblies are controlled to carry out exposure in sequence so as to realize the high frame frequency imaging of a scene; the beam splitter prisms are arranged inside the optical system, and eight imaging light paths formed after the beam passes through every beam splitter prism are completely the same. The conflict between high resolution and frame frequency is solved, and the system has the characteristics of high frame frequency, high solution, compact structure, good imaging, convenience in use, high environmental suitability and the like.
Owner:AEROSPACE DONGFANGHONG SATELLITE
Lensless fluorescence microscopic imaging device and image reconstruction method thereof
ActiveCN111917964AHigh resolutionImprove image qualityTelevision system detailsImage enhancementMicroscopic imageMicro imaging
The invention belongs to the technical field of fluorescence microscopic imaging, and relates to a lensless fluorescence microscopic imaging device and an image reconstruction method thereof. The device comprises a monochromatic excitation light source, a movable scattering sheet, a fluorescent sample layer, a high-performance optical filter and an image sensor, wherein the movable scattering sheet is arranged below the monochromatic excitation light source, the fluorescence sample layer is arranged on the lower side of the movable scattering sheet, the movable scattering sheet is parallel tothe fluorescence sample layer, the fluorescence sample layer is used for placing a fluorescence sample to be detected, and the high-performance optical filter is arranged on the lower side of the fluorescence sample layer. The high-performance optical filter is matched with the monochromatic excitation light source and a fluorescent sample of the fluorescent sample layer, and the image sensor is arranged on the lower side of the high-performance optical filter; the lensless fluorescence microscopic imaging device is simple in light path, short in imaging light path, simple and convenient in system operation, large in imaging view field and low in equipment cost; the reconstruction algorithm of the fluorescence sample image is used for processing the fluorescence sample image, and the processed image is high in resolution and good in image quality.
Owner:青岛联合创智科技有限公司
Microscopic imaging method based on phase encoding single lens
ActiveCN111221118ARealize Microscopic ImagingLarge imaging field of viewMaterial analysis by optical meansMicroscopesMicroscopic imageNeural network nn
The invention discloses a microscopic imaging method based on a phase encoding single lens. The method only adopts one single lens with a phase encoding function for imaging, combines with a subsequent processing algorithm, can realize microscopic imaging resolution capability equivalent to that of an existing precision commercial microscope, and is suitable for portable biological tissue and celldetection under field conditions. Firstly, an imaging system adopts a phase encoding single lens with two aspheric surfaces to image a biological sample, and an image sensor is located at the conjugate position of the biological sample under G light illumination and used for collecting images; and then, the acquired images are processed by adopting an algorithm: respectively executing an automatic focusing algorithm on the acquired images in R / B channels, and reconstructing and recovering the focusing images of the R / B channels; performing high-resolution image reconstruction on the quasi-focus images of the R, G and B channels by adopting a trained kernel function of a generative adversarial neural network (GAN); and finally, performing image matching and color fusion on the reconstructed R / G / B images.
Owner:NANJING UNIV OF SCI & TECH
Opto-acoustic microimaging system and opto-acoustic microimaging method
ActiveCN108872082ABroad spectrum detectionHigh sensitivityMaterial analysis by optical meansOptical pathDecomposition
The invention discloses an opto-acoustic microimaging system. The opto-acoustic microimaging system comprises an exciting light generator, an exciting light path, a detection light generator, a detection light path, a coupling sensor, a light beam decomposition light path and a signal acquisition module. The coupling sensor comprises a metal film, a prism with a convex structure, and a liquid medium. Exciting light acts on a to-be-detected object to generate and return opto-acoustic waves, and accordingly, the refractive index of the liquid medium changes along with time. Detection light comprises components S and P. The prism acts on the metal film to trigger surface plasma resonance, absorption of the component P is influenced by modulation of refractive index changes of the liquid medium, and the detection light is refracted by the prism after the strength of the component P is changed. The detection light is decomposed into the component S and the component P, and the time-dependent opto-acoustic signals are generated according to light intensity difference signals to achieve imaging. Compared with the prior art, the opto-acoustic microimaging system has the advantages that thevisual angle for signal detection is widened by the prism with the concave structure, the opto-acoustic signals away from the optical axis can be received, the field of view for imaging is improved,and acquiring and imaging of the opto-acoustic signals in a large field of view are realized.
Owner:SHEN ZHEN SHEN GUANG SU TECH CO LTD
Image focusing method of femtosecond laser system
ActiveCN112099218AAvoid lostFlexible choiceMicroscopesLaser beam welding apparatusFemto second laserEngineering
The invention discloses a femtosecond laser system image focusing method, and belongs to the technical field of femtosecond laser system direct writing processing. The method comprises the steps: finding a laser spot focusing position by means of a mode that laser scratches ink marks on the surface of a substrate, fixing three adjusting hardware, namely a CCD, a processing objective lens and a piezoelectric platform, and taking the position of an object as a unique adjusting variable; determining and fixing a corresponding position of an object in the focusing light path, and indirectly reflecting a laser focusing state by imaging state definition. If the CCDs are located at the same position, a clear substrate surface can be observed, the clear stripe imaging can also be observed, and itis indicated that focusing is accurate. In subsequent processing, in order to compensate the height difference between different substrates, only the z-direction position of the processing objective lens needs to be finely adjusted to enable stripes to be clear. According to the focusing method, an original light path structure does not need to be changed, temporary building and application are quite easy to achieve, operation steps are relatively simple, requirements for experiment instruments and experiment environments are not high, and implementation is easy.
Owner:JILIN UNIV
Synthetic aperture laser imaging radar receiving and transmitting system based on light beam coherent combination
PendingCN109581411AIncrease the launch apertureLarge imaging field of viewElectromagnetic wave reradiationBeam splitterFrequency modulation
The invention discloses a synthetic aperture laser imaging radar receiving and transmitting system based on light beam coherent combination. The transmitting system of the invention comprises a laserlight source, a frequency modulator, an arbitrary waveform generator, a first light beam splitter, a second light beam splitter, an optical fiber amplifier group, a first photon lantern and a transmission lens. A receiving system of the invention comprises a receiving lens, a second photon lantern, a light beam coherent synthesizer, a frequency mixer, a balance detector and a signal demodulator. By use of the system, the optical toe and the imaging width degree of a target surface can be enlarged, and an imaging field of view is enlarged. In addition, the signal-to-noise ratio of the system isfurther improved, and an error rate is lowered. In addition, since the system reduces the use of the detector and the frequency mixer, cost can be greatly lowered so as to perform an important meaning for an airborne synthetic aperture laser imaging radar with long distance, high sensitivity and a high width degree.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Single exposure phase recovery imaging device and imaging method
InactiveCN112326601AShorten the timeLarge imaging field of viewScattering properties measurementsLight beamSingle exposure
The invention relates to a single exposure phase recovery imaging device comprising an LD light source, a hemispherical shell, a small hole, a sample, a two-dimensional displacement platform, a two-dimensional photoelectric detector, a computer and data acquisition and processing software; the imaging method comprises the following steps: moving a sample through the two-dimensional displacement platform, and calibrating an illumination light array to obtain complex amplitude distribution of each illumination light beam; and recording a diffraction pattern containing 30 sub-diffraction spots byusing a two-dimensional photoelectric detector, and recovering the complex amplitude distribution of the sample. The device is simple in structure, low in manufacturing cost and short in data acquisition time, and the phase recovery algorithm has the characteristics of high convergence speed, high imaging measurement precision and the like.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Infrared thermal imaging optical system and application thereof
ActiveCN112882198ALarge imaging field of viewExcellent uniformity of illumination across the field of viewDiagnostic recording/measuringSensorsLow noiseImage plane
The invention provides an infrared thermal imaging optical system. The system sequentially comprises a meniscus negative power lens L1, a biconvex positive power lens L2, a diaphragm S, a biconcave negative power lens L3 and a biconvex positive power lens L4 from an object plane to an image plane along an optical axis. The reciprocal 1 / gamma of the angular magnification of the meniscus negative-power lens L1 to the off-axis chief light meets the condition that 1 / gamma is larger than or equal to 1.5 and smaller than or equal to 2.4. The invention further provides application of the infrared thermal imaging optical system in the medical field. The infrared thermal imaging optical system realizes optical system design with large relative aperture, large field of view and high illumination uniformity, has high spatial resolution imaging capability, realizes the capabilities of low noise equivalent temperature difference and large imaging field of view, can meet the temperature measurement requirement of infrared thermal imaging equipment for a high-performance infrared optical system, and facilitates wide application and popularization in the medical technology.
Owner:FOSHAN UNIVERSITY
Pure-phase high-resolution spatial light modulator with 4 pi modulation range
PendingCN114137772AReduce vertical sizeHigh resolutionNon-linear opticsSpatial light modulatorResonance spectrum
The invention discloses a pure-phase high-resolution spatial light modulator in a 4-pi modulation range. The pure-phase high-resolution spatial light modulator mainly comprises two resonance type metasurfaces, a liquid crystal medium environment, an electrode layer, a reflecting layer and the like, wherein the resonance type metasurfaces are oppositely arranged and are composed of dielectric medium sub-wavelength unit structures and substrates. Based on the characteristic that the resonance spectrum of the metasurface can be adjusted by changing electromagnetic parameters of an external environment, the Huygens metasurface is combined with liquid crystal, and light wave phase point-by-point continuous dynamic modulation under the sub-wavelength pixel scale is achieved. In addition, due to the design of introducing the laminated metasurface and the reflecting layer, the total phase modulation depth can reach 4 pi, and extremely high working efficiency can be kept. Compared with the existing pure-phase spatial light modulator technology, the device provided by the invention effectively improves the resolution and dynamic range of the device, is wider in application scene, is smaller in size, is lighter in weight, and is easier to integrate.
Owner:WUHAN UNIV
Ultrathin spatial light modulator based on liquid crystal-based metasurface
PendingCN114114770AReduce vertical sizeAchieve ultra-thinNon-linear opticsWavelengthMaterials science
The invention discloses an ultrathin spatial light modulator based on a liquid crystal-based metasurface. The ultrathin spatial light modulator is mainly composed of a resonance type Huygens metasurface, an upper substrate, a birefringence medium environment, an upper electrode layer and a lower electrode layer. The micro-nano modulation unit of the metasurface is immersed into a liquid crystal medium environment of which electromagnetic parameters can be adjusted by external stimulation, so that the resonant spectrum position can be dynamically changed, and pure phase modulation in a 2pi range can be realized for incident light with a certain fixed working wavelength. Compared with the traditional liquid crystal spatial light modulator, the change of the light wave phase mainly occurs in the metasurface structure with the sub-wavelength thickness and does not depend on the phase accumulation of the metasurface structure when the metasurface structure is propagated in the liquid crystal, so that the longitudinal size of the device can be greatly reduced, an ultra-thin and ultra-high-resolution active optical device is really realized, and the application prospect is wide. The design freedom degree is high, machining is easy, and the good development prospect is achieved in the fields of laser radars, adaptive optics and the like.
Owner:WUHAN UNIV
Spectral imaging system and method based on diffraction lens/zoom lens array
InactiveCN112097904ACompact structureIncrease luminous fluxRadiation pyrometrySpectrum investigationOphthalmologySpectrograph
The invention relates to a spectral imaging technology, and in particular relates to a spectral imaging system and method based on a diffraction lens / zoom lens array, and aims at solving the problemsthat an existing spectrograph is complex in structure, high in manufacturing cost and poor in spatial resolution of a formed image. According to the technical scheme, the spectral imaging system basedon the diffraction lens / zoom lens array comprises the diffraction lens array, the zoom lens array, a photoelectric detector array, a control unit and a data processing unit. The diffraction lens array, the zoom lens array and the photoelectric detector array are sequentially arranged on the same optical path, the optical path comprises N wavelength spectrum bands, and N is greater than or equal to 2; the control unit is electrically connected with the zoom lens array, the control unit is used for adjusting the focal length of the zoom lens array, and the data processing unit is electrically connected with the photoelectric detector array; the invention further provides a method of the spectral imaging system based on the diffraction lens / zoom lens array.
Owner:XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
Mirau-type super-resolution interference microscope objective
ActiveCN109828365ARealize 3D super-resolution imagingSolve spherical aberrationMicroscopesHigh resolution imagingBeam splitter
The invention discloses a Mirau-type super-resolution interference microscope objective. The sub-nanometer axial resolution is achieved by employing an interference microscope objective, a microspherelens is employed to break through the diffraction limit to achieve two-dimensional lateral super-resolution. A super-resolution interference microscope objective through fusion of the interference microscope objective and the microsphere lens is provided, the microsphere lens is added between the interference microscope objective and a sample to be tested to optimize and design parameters of a reference panel, a beam splitter panel and the microscope objective, obtain clear 3D super-resolution interference fringes and achieve 3D high-resolution imaging. The Mirau-type super-resolution interference microscope objective can achieve horizontal super-resolution by means of a simple optical method to obtain the three-dimensional high-resolution information of the microstructure to be tested with no need for complex marking processing for the samples, can achieve rapid and lossless measurement and has a high practical value.
Owner:NANJING UNIV OF SCI & TECH
Bright field phase microscopic imaging device and method based on spiral phase plate
ActiveCN112345523ARemove restrictionsEasy to operateMaterial analysis by optical meansMicro imagingLaser light
The invention provides a bright field phase microscopic imaging device and method based on a spiral phase plate. The device comprises: a laser light source; a beam expanding and collimating unit usedfor carrying out beam expanding and collimating on the laser beam and projecting the laser beam onto a sample to generate Gaussian light carrying sample information; a phase modulation unit used for carrying out phase modulation on the Gaussian light according to the imported spiral phase plate hologram and generating vortex light carrying sample information; a detector used for collecting vortexlight and obtaining an imaging intensity graph; and a control terminal used for processing the imaging intensity image to obtain a reconstructed sample phase information image. According to the invention, phase modulation is carried out on the Gaussian beam carrying the sample information, and the collected Gaussian beam is converted into the vortex light, so that the sample phase information canbe obtained by shooting and recording the imaging intensity graph once, the device is simple, the operation is convenient, the imaging speed is high, the imaging field of view is large, the limitationof dark field imaging is eliminated by bright field imaging, the time resolution of phase microscopic imaging is greatly improved, and the imaging steps are simplified.
Owner:SHENZHEN UNIV
Method for measuring nonmetallic inclusion in steel
InactiveCN102621148BEasy to operateMature technologyPreparing sample for investigationOptically investigating flaws/contaminationNon-metallic inclusionsCorrosion
Owner:DONGGUAN KELEE STEEL WIRE
Optical imaging system and ultra-high frame rate imaging method based on beam splitting prism
ActiveCN108828895BHighly integratedCompact structureHigh-speed photographyOptical elementsHigh frame rateOphthalmology
Owner:AEROSPACE DONGFANGHONG SATELLITE
A Femtosecond Laser System Image Focusing Method
ActiveCN112099218BAvoid lostMeet processing needsMicroscopesLaser beam welding apparatusFemto second laserEngineering
Owner:JILIN UNIV
A fast wide-field volume holographic fluorescence microscopy imaging system
ActiveCN105352923BImprove spectral switching speedFast switching speedFluorescence/phosphorescenceGratingBeam splitter
The invention relates to a fast wide-field volume holographic fluorescent microscopic imaging system, which is characterized in that it includes a laser light source, a dichroic beam splitter, a microscopic objective lens, a MEMS microreflector array device, a volume holographic grating device, and an imaging lens and the image detector array; the laser light source emits the illumination light wave to the dichroic beam splitter; the dichroic beam splitter irradiates the illumination light wave through the microscopic objective lens to the imaging target, and the fluorescence emitted by the imaging target returns to the dichroic beam splitter through the microscopic objective lens, The microscopic objective lens projects the fluorescence to the MEMS micro-mirror array device; the MEMS micro-mirror array device encodes the angle of the light waves at different positions according to the central wavelength of the imaging spectrum and the Bragg characteristic parameters of the volume holographic grating device, and then controls the angle of the imaging beam. The deflection direction, the deflected imaging beam is incident on the volume holographic grating device at a matching angle; the volume holographic grating device diffracts the incident light encoded by the spatial angle, and the diffracted light is decoded by the MEMS micro-mirror decoding array device and then passes through the imaging lens Imaging onto the image detector array.
Owner:TSINGHUA UNIV
Photoacoustic microscopy imaging system and method
ActiveCN108872082BHigh bandwidthSensitive detectionMaterial analysis by optical meansMicro imagingLiquid medium
Owner:SHEN ZHEN SHEN GUANG SU TECH CO LTD
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