31 results about "Optical index" patented technology

The invention discloses a large-view-field low-distortion infrared telecentric scanning objective lens which comprises a lens body, the lens body is composed of a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are arranged along an axis, the first lens is a positive lens, the second lens is a negative lens, the third lens is a negative lens, the fourth lens is a meniscus positive lens, and the fifth lens is a negative lens. The fifth lens is a positive lens, and the first lens and the second lens are cemented lenses. According to the invention, through combination of a plurality of lenses and the balsaming lens, high optical index, good temperature adaptability, low distortion, large target surface and large entrance pupil diameter are realized; by reasonably distributing the focal power of each lens and adopting the combination of optical materials with specific refractive index and Abbe number, various aberrations such as spherical aberration, curvature of field, chromatic aberration and the like are effectively corrected, so that high-quality imaging with system RMS wavefront less than 0.02 lambda is realized, the distortion is strictly controlled below 0.02%, and the imaging quality is greatly improved. And a sub-pixel-level accurate positioning capability is realized for high-precision machine vision and measurement detection.

The invention relates to the technical field of spaceflight, in particular to a design method and device of a spaceflight optical load and a computer program product. The design method of the spaceflight optical load comprises the following steps: determining the emphasis dimension of a to-be-designed optical load according to a received task demand, and determining an optical weight, a mechanical weight and a thermal control weight based on the emphasis dimension; determining a performance optimization objective function according to the optical weight, the mechanical weight, the thermal control weight, the optical index, the mechanical index and the thermal control index; and performing simulation design on the optical load based on a simulation model and the task demand, and optimizing the simulation design at least based on the performance optimization objective function.

The invention discloses an optical index testing method and device, wearable display equipment and a storage medium, and the method comprises the steps: carrying out the shooting of a test graphic card at different visual angles, and obtaining at least two to-be-spliced images; aligning the images to be spliced to form an overlapping region; the image gradual change direction of each repeated image in the overlapping area is determined, and the image gradual change direction is the direction from the to-be-spliced image side from which the repeated image comes to the other adjacent to-be-spliced image side; the pixel values of the corresponding repeated images are gradually reduced in the overlapping area according to the image gradual change direction, the pixel values of the repeated images are overlapped, a spliced image is generated, and the overlapped pixel values of the repeated images in the overlapping area are consistent with the pixel values of the to-be-spliced images; the optical index is tested according to the spliced image, so that an obvious boundary trace is prevented from appearing at the splicing line of the overlapped region, and the accuracy of the optical index test is effectively improved.

This invention discloses a method and apparatus for extracting rice information based on multi-source remote sensing and machine learning. First, rice is extracted from Sentinel-1 and Sentinel-2 images using rice indices and optical indices, respectively. The union of the extraction results forms a potential rice distribution map. Pixels are extracted from the distribution map and the areas outside the distribution map as labels for rice and non-rice samples. The VH time-series values ​​and SWIR1 band reflectance of each labeled sample point are extracted from the Sentinel-1 and Sentinel-2 images, respectively, and training sets are constructed to train two classification models. Images of the study area are acquired, and the rice probability distribution is obtained using the corresponding classification models and weighted fusion is performed. Data from a statistical yearbook is used to constrain the area of ​​the obtained probability distribution map, and the optimal probability threshold is obtained for rice extraction from the probability distribution map. This invention can achieve high-precision regional rice mapping using free imagery.

The invention discloses a rice information extraction method and equipment based on multi-source remote sensing and machine learning, and the method comprises the steps: firstly extracting rice from a Sentinel-1 image and a Sentinel-2 image through employing a rice index and an optical index, and obtaining a union set of extraction results to form a potential rice distribution diagram; respectively extracting pixels from the distribution map and the area outside the distribution map as rice and non-rice sample labels; respectively extracting a VH time sequence value and SWIT1 wave band reflectivity of each label sample point on the Sentinel-1 image and the Sentinel-2 image, and respectively constructing training sets to train two classification models; and obtaining an image of a research area, obtaining rice probability distribution by using a corresponding classification model, performing weighted fusion, performing area constraint on an obtained probability distribution diagram by using data of statistical yearbook, and obtaining an optimal probability threshold to perform rice extraction on the probability distribution diagram. According to the method, regional high-precision rice drawing can be realized by using free images.

The invention belongs to the technical field of laser detection, and discloses a myriawatt-level optical parameter measurement system which comprises a detection assembly and a light splitting assembly. The detection assembly comprises a first detection unit, a second detection unit, a third detection unit and a fourth detection unit. The light splitting assembly is used for receiving an original light beam emitted by a fiber laser, and the light splitting assembly comprises multiple stages of light splitting elements arranged along a light path so as to split the original light beam into at least four paths of detection light beams; the first detection light beam enters the first detection unit, the second detection light beam enters the second detection unit, the third detection light beam enters the third detection unit, and the fourth detection light beam enters the fourth detection unit. The device can synchronously test multiple key optical indexes of the fiber laser, and is simple in structure, accurate in result and high in stability.

The application provides a building outer wall defect detection method and system based on acousto-optic-thermal multi-physical field coupling, and relates to the technical field of intelligent nondestructive testing. The method comprises the following steps: according to the comparison result between the optical indexes of each region in the building outer wall image and the index conditions, candidate regions with defects are selected from multiple regions of the building outer wall image; a temperature change sequence of each pixel point collected during the application of sound excitation and thermal excitation to the outer wall region corresponding to the candidate region is obtained; time-frequency transformation and phase-locked analysis are performed on the temperature change sequence of each pixel point to obtain the thermal-acoustic coupling parameter and resonance intensity parameter of each pixel point; the defect type to which each pixel point belongs is determined; for multiple pixel points with the defect type of hollowing in the candidate region, based on the preset calibration relationship between the resonance peak feature and the hollowing depth and the bonding stiffness, the hollowing depth and the bonding stiffness are obtained by inversion according to the resonance peak feature of the multiple pixel points.

The utility model relates to the technical field of production line optical index testing, and particularly discloses an auxiliary fixing device for optical index testing, which comprises a fixing seat, a first upright post and a product fixing piece, the first stand columns are fixed to the fixing base, and each first stand column is provided with a plurality of product fixing pieces. The product fixing piece is vertically connected to the first stand column in a sliding mode, and the product fixing piece can be positioned, locked and fixed to the first stand column through a bolt; the test fixing device can be compatible with fixation of test products of more models or sizes, corresponding test fixing devices do not need to be produced for different test products, cost is saved, and production benefits are improved; according to different sizes of products, the distance between the power supply fixing piece and the network port fixing piece is adjusted, multiple to-be-tested products can be inserted at the same time for testing, and efficient optical index testing is carried out on the test by matching with a testing instrument.

The invention provides a building outer wall defect detection method and system based on acousto-optic-thermal multi-physics field coupling, and relates to the technical field of intelligent nondestructive testing. The method comprises the following steps: screening candidate areas with defects from a plurality of areas of a building outer wall image according to a comparison result between an optical index and an index condition of each area in the building outer wall image; acquiring a temperature change sequence of each pixel point acquired during the period of applying acoustic excitation and thermal excitation to the outer wall region corresponding to the candidate region; performing time-frequency transformation and phase lock analysis on the temperature change sequence of each pixel point to obtain a thermoacoustic coupling parameter and a resonance intensity parameter of each pixel point; determining a defect type to which each pixel point belongs; and for the plurality of pixel points of which the defect types are hollowing in the candidate region, based on a preset calibration relationship between the formant characteristics and the hollowing depth and the bonding stiffness, carrying out inversion according to the formant characteristics of the plurality of pixel points to obtain the hollowing depth and the bonding stiffness.

The present invention provides an optical film comprising a polymer resin, which comprises a first repeating unit, a second repeating unit, a third repeating unit and a fourth repeating unit, wherein the optical index of the film is 1.0% / GU or more, the first repeating unit is an imide repeating unit derived from a first diamine-based compound and a dianhydride-based compound, the second repeating unit is an imide-repeating unit derived from a second diamine-based compound and a dianhydride-based compound, the third repeating unit is an amide-repeating unit derived from a first diamine-based compound and a dicarbonyl-based compound, the fourth repeating unit is an amide-repeating unit derived from a second diamine-based compound and a dicarbonyl-based compound, the first diamine-based compound is 2,2′-bis(trifluoromethyl)benzidine (TFDB), the second diamine-based compound includes an aromatic diamine-based compound, and the third repeating unit and the fourth repeating unit are included in a proportion of 80% or more with respect to the total number of the repeating units comprising the first to fourth repeating units.

The invention discloses a binocular AA image combination device for XR device research and development experiments, and relates to the technical field of image combination devices, the binocular AA image combination device comprises a rack, a control system arranged on the rack, and an image acquisition module electrically connected with the control system; the jig bearing table is arranged in the working area of the rack and used for bearing a to-be-assembled mirror frame; the number of the six-degree-of-freedom adjusting modules is two. According to the method, the binocular image combination deviation value is used as a core control variable, and the conversion from optical index priority to wearing comfort priority is realized by using a global evaluation model; when conflicts occur, the system actively sacrifices trace monocular definition, and the binocular visual axis deviation is forcibly corrected, so that the research and development model machine is ensured to accord with the physiological tolerance limit of human eyes; by simulating a binocular fusion mechanism of human eyes at an equipment end, research and development personnel can directly find whether an image combination dead zone exists in optical design or not in an assembly stage, so that the condition of repair after operation is avoided.

The present disclosure relates to an optical assembly and a display device. The optical assembly comprises a base layer, and an anti-glare layer and an anti-reflection layer which are disposed in sequence on the base layer. The anti-glare layer comprises silicon oxide; and the anti-reflection layer comprises five high-refractive-index sub-layers and five low-refractive-index sub-layers that are alternately stacked. Each of the high-refractive-index sub-layers has a refractive index of 1.6-4.0, each of the low-refractive-index sub-layers has a refractive index of 1.38-2.5, and the refractive indexes of the high-refractive-index sub-layers are greater than the refractive indexes of the low-refractive-index sub-layers. In a direction away from the anti-glare layer, each of the high-refractive-index sub-layers and each of the low-refractive-index sub-layers have a thickness within a respective specific range. The optical assembly in the present disclosure has the effects of anti-glare, anti-reflection and multi-angle color consistency under the condition that conventional optical indexes are satisfied.

The present application relates to a low perfusion blood oxygen saturation detection method based on dynamic light compensation, a combined feature relationship based on multi-wavelength reflection intensity and fluctuation amplitude is constructed, the optical sparsity of tissue, that is, the optical representation of the density of red blood cells in the tissue, is dynamically judged; the current perfusion degree is deduced through the morphological characteristics of the reflection waveform; a perfusion optical index is established; the time series modeling method is used to analyze the change trend of the light reflection dynamics in the past period of time; the LED driving strategy is dynamically adjusted to form a light compensation behavior similar to physiological rhythm in three modes of step-by-step climbing, pulse stimulation and cycle maintenance; each light compensation action is regarded as a physiological stimulation; the dynamic morphological similarity discrimination is introduced to quantify whether each light compensation truly causes tissue response, and to distinguish real physiological fluctuations from noise disturbances; for low-response light compensation, the light compensation intensity is feedbackly reduced; otherwise, for high-response light compensation, the key deformation characteristics are extracted for signal reconstruction, which can enhance the signal recognition ability in a low perfusion environment.

The invention belongs to the technical field of diamond identification, and particularly relates to a method for identifying electronic-grade diamond through vacuum ultraviolet excitation fluorescence intensity. Due to the fact that the intrinsic excited state radiative recombination efficiency of the ultrapure diamond within the range of about 80-100 K is extremely high, the exciton luminous intensity of the ultrapure diamond can reach 1 / 4 of the exciton luminous intensity of a commercial gallium nitride single crystal sample at 80 K, namely the same order of magnitude, and the characteristic can serve as an important optical index for judging electronic-grade diamonds. The laser of which the photon energy is greater than the band gap of the diamond is used for exciting the excitons of the diamond to emit light, and the exciton luminous intensity of the reference material is combined for comparison, so that electrode processing is not needed, and the electronic-grade diamond can be quickly and reliably judged in a lossless manner.

The embodiment of the utility model relates to the technical field of laser, and discloses a laser emitting device and a laser radar, and the laser emitting device comprises a circuit board; the light source comprises a fixed surface and a light-emitting surface which are opposite, the fixed surface is fixed on the non-edge area of the first surface of the circuit board, and the light-emitting surface is used for outputting a laser beam perpendicular to the circuit board; the pressing strip assembly is arranged in the edge area of the first face, and the pressing strip assembly is attached to the circuit board in the direction of one edge of the first face; and the collimating lens group is arranged on an emergent light path of the light source and is used for collimating the laser beam and then emitting the laser beam. By means of the mode, the divergence angle of the collimated laser beam is basically kept consistent with the designed divergence angle, and the optical index requirement of the laser emitting device is met.

The invention provides a detection device and a detection method. The detection device is applied to laminated glass and comprises two optical prisms and three anti-reflection optical elements. The first optical prism is arranged on one side surface of the detection sample, and the second optical prism is arranged on the other opposite side surface of the detection sample; the first anti-reflection optical element is arranged on the surface, deviating from the detection sample, of the first optical prism, and the second anti-reflection optical element and the third anti-reflection optical element are arranged on the surface, deviating from the detection sample, of the second optical prism. The two optical prisms and the three anti-reflection optical elements are arranged and can be matched with a detection sample to form an optical prism coupling structure with a simple and compact structure, and the optical prism coupling structure is suitable for being directly placed in a spectrophotometer to realize high-precision measurement, so that various high-precision optical indexes of the detection sample are obtained; in addition, the anti-reflection optical element has ultra-low reflectivity in a wide incident angle range, and the detection device is also suitable for the wide incident angle range.

The invention relates to the technical field of eye movement tracking, in particular to an optical simulation method for an eye movement tracking system, and the method comprises the steps: carrying out the model selection of a camera and an infrared light supplement lamp according to the system demands; establishing a camera optical system and an infrared LED illumination model according to a model selection result; according to system requirements, primary arrangement is carried out on optical layouts of the camera and the infrared light supplement lamp; tracing simulation is carried out on a camera imaging light path and an infrared light supplementing lamp illumination light path; judging whether the geometrical optical indexes meet requirements or not under the current optical layout; and judging whether the irradiance index meets the requirement or not under the current optical layout. According to the method, the geometrical optical index and the irradiance index are judged and iterated, so that the system gradually approaches to the system demand index and gradually tends to be stable, the recognition precision of the eye movement tracking system can be optimized, the working range of the system is widened, and it is ensured that infrared radiation generated in the system meets the human eye infrared irradiance safety.

The application provides a display performance evaluation method and device, equipment and a readable storage medium. The method comprises the following steps: controlling a display device to be evaluated to display an actual display object in a target display mode, wherein the target display mode comprises any one of the following modes: a normal mode, an eye protection mode and a night mode; acquiring actual optical indexes of all target pixel positions of the display device to be evaluated; and combining all the actual optical indexes to generate a display performance evaluation result corresponding to the target display mode. Through the implementation of the application, the optical indexes are acquired from the pixel point level to evaluate the overall display performance of the display device for the actual display object, which has high display performance evaluation applicability and improves the accuracy of the display performance evaluation result.

The application discloses a park landscape water body water quality sensing early warning management method and system, belongs to the technical field of water quality monitoring and landscape management, and comprises the following steps: collecting water surface multi-spectrum images and binocular stereo images of a park water body to form a time-synchronized multi-view image sequence; constructing a three-dimensional space coordinate of a water body surface according to the multi-view image sequence; mapping each band reflectivity on the three-dimensional coordinate to obtain a water body surface reflectivity spatial distribution map; extracting a water body appearance index vector according to the water body surface reflectivity spatial distribution map; establishing a correlation between reflectivity and water quality optical indexes, and inversely solving a water quality optical index vector; calculating a consistency deviation value of the water body appearance index vector and the water quality optical index vector, judging whether the indexes exceed a preset early warning threshold value, and outputting an early warning message if the indexes exceed the preset early warning threshold value; and outputting a management strategy according to the early warning message. The application avoids external interference through non-contact sensing, and reduces the false alarm rate through appearance and water quality optical double determination.

The invention discloses an optical-mechanical system modularization automatic installation and adjustment system and a technological method, and belongs to the field of precision optical-mechanical installation and adjustment. A laser tracker and a plurality of auto-collimation theodolites form a measurement net by adopting an intersection measurement principle, and the measurement net is used for measuring the position of a target module under a global coordinate system; the optical index detection optical path is used for measuring the optical index of the target module in real time, and performing repeated pose adjustment on the target module by using the pose adjustment device according to an optical index feedback value; and the pose adjusting device is used for sending the target module into the main optical machine system according to the planned motion path and adjusting the pose of the target module according to the pose feedback of the target module in the optical index detection optical path until the optical index meets the requirement. According to the method, the poses of all the modules are adjusted in time in the installation and adjustment process, efficiency is greatly improved, and the installation and adjustment method is high in universality and can be used for the initial installation and adjustment stage of various large complex multi-module optical-mechanical systems.

The invention discloses a communication optical connection device and a manufacturing method thereof. A waveguide array unit with at least one waveguide element, an optical active element array unit with at least one optical active element and a mother carrier plate unit with at least one son carrier plate are sequentially calibrated, positioned, connected and fixed into a whole along the X-axis direction of an XYZ three-dimensional space; gaps among the units are filled with filling materials with the optical index larger than that of air, and the waveguide elements, the optical active elements and the sub-carrier plates are sequentially connected in the X-axis direction through the one-to-one coupling relation of the optical axes or the positioning reference axes to form an optical channel without any air or vacuum gaps. Therefore, the communication optical connection device can be composed of at least one optical channel, and the optical channels are arranged on the YZ plane at intervals to form an array, so that the purposes of high coupling efficiency and high transmission density are achieved.

The application discloses a binocular AA image combination device for XR device research and development experiments, relates to the technical field of image combination devices, and comprises a rack, a control system arranged on the rack, and an image acquisition module electrically connected with the control system; further comprises: a jig bearing table arranged in the working area of the rack and used for bearing a to-be-assembled frame; and a six-degree-of-freedom adjustment module provided with two groups. The binocular image combination deviation value is taken as a core control variable, and a global evaluation model is used to realize the change from optical index priority to wearing comfort priority. When a conflict occurs, the system actively sacrifices a small amount of single-eye clarity, forcibly corrects the binocular visual axis deviation, and ensures that the research and development prototype meets the physiological tolerance limit of the human eye. By simulating the binocular fusion mechanism of the human eye at the device end, the research and development personnel can directly find whether there is an image combination dead zone in the optical design in the assembly stage, thereby avoiding the situation of repairing after operation.

The application discloses a kind of large aperture optical system's installation detection method and device, solve the problem that existing large aperture optical testing system cannot provide safe and reliable, can directly enter for installation and detection environment problem, the application is integrated in the light pipe chamber and load chamber that are interconnected with the parallel light pipe and the load to be detected together, by personnel into jar and carry out installation detection work, maintain stable low pressure environment in jar, both effectively resist the sudden airflow disturbance brought by personnel walking, equipment heat dissipation and other external environmental changes, while effectively reducing air density when isolating external airflow disturbance, ensure the system stability and robustness in long time installation detection process, reduce the interference of airflow disturbance to optical system wavefront, provide reliable data for accurate installation and final imaging quality of optical system, can satisfy optical remote sensing load optical index detection and calibration under low vacuum environment, optical remote sensing load high-precision installation and integration requirement.

The invention discloses an optical simulation analysis method, electronic equipment and a computer readable storage medium, the optical simulation analysis method is applied to an optical-mechanical system, and the method comprises the steps that a temperature field of the optical-mechanical system is acquired, and the temperature field represents temperature distribution of the optical-mechanical system under the thermal load effect; obtaining a displacement field generated by a structure simulation model according to the temperature field and the structure simulation model of the optical-mechanical system; decoupling the displacement field to obtain rigid body displacement and elastic deformation of each optical element in the optical-mechanical system; obtaining a target optical simulation model according to the rigid body displacement and the elastic deformation of each optical element; and obtaining optical indexes of the optical-mechanical system based on the target optical simulation model. By means of the mode, simulation analysis of thermal-structural-optical multi-physics field coupling can be achieved, thermal deformation of the optical-mechanical system when the optical-mechanical system is subjected to thermal loads is predicted, and more accurate optical indexes are obtained.

The invention relates to the technical field of control and regulation, in particular to a GaN display device driving power optimization method, which comprises the following steps of: acquiring a display panel driving current, a grid voltage transient waveform and a distributed capacitance gradient in real time, and transmitting to a signal processing unit to generate an interference feature vector containing a switch multiple frequency spectrum peak position, a coupling coefficient gradient and a gray scale distortion rate; calling particle swarm optimization, simulated annealing or a genetic algorithm through an index engine to generate a compensation solution set, and screening an optimization scheme conforming to an optical index in combination with a virtual simulation environment; multi-mode control is executed according to the interference type, grid blocks of a shielding layer are synchronously segmented, a minimum impedance backflow path is constructed to block electromagnetic coupling, and register refreshing and microsecond-level compensation switching are completed through line scanning gaps. Through a cooperative mechanism of feature extraction, dynamic compensation, path blocking and closed-loop optimization, the problems of signal modulation precision degradation and dynamic display inconsistency caused by the fact that high-frequency switching noise invades a weak current basin through capacitive coupling are solved.

An optical communication interconnect device and a manufacturing method thereof are provided. Along the X-axis in a 3-dimensional (XYZ) space, a waveguide array unit having at least one waveguide member, an active optical component array unit with at least one active optical component, and a mother substrate unit with at least one subsidiary substrate are aligned, positioned, and connected. Gaps between the units are filled fully by a filler whose optical index is larger than that of air. The waveguide member, the active optical component, and the subsidiary substrate are connected by one-on-one coupling of optical axes or position reference axes along the X-axis to form an optical channel without air or vacuum gaps. Thereby the optical communication interconnect device is formed by optical channels spaced apart at a YZ plane to form an array. High coupling efficiency and transmission density are achieved.

The invention belongs to the field of composite optical index detection, and particularly relates to a multi-band detection assembly optical performance test system. By integrating the multi-band signal synthesis module, the target signal containing multiple bands can be provided in a single system, and errors and time consumption caused by successive testing of multiple single-band devices are avoided. And meanwhile, the installation mode of fixing on the focal plane of the optical collimation module eliminates the inconsistency introduced by equipment switching. The optical collimation module converts a signal into multiband parallel light simulating an infinite target, the parallel light can improve the authenticity of a test environment, the integrated projection characteristic of the parallel light enables multiband response data of a tested assembly to be synchronously or rapidly collected, and the analysis rate is remarkably improved. And the control module uniformly controls signals and processes data, so that test automation is realized. In conclusion, according to the scheme, through the integrated design, the problems of low efficiency and poor accuracy of successive testing are fundamentally solved, and the testing efficiency and the result reliability are remarkably improved.

The invention provides an optoelectronic light emitting device comprising: a light emitting diode configured to emit first radiation; and a conversion layer extending above the light emitting diode and configured to convert at least part of the first radiation into second radiation by photoluminescence; the conversion layer being laterally delimited by a lateral surface and comprising at least one planar quantum well configured to emit the second radiation; a diffraction grating configured to extract at least part of the second radiation from the conversion layer; the diffraction grating being etched on an upper surface of the conversion layer; the device further comprising a lateral reflector having a reflective face laterally extending with respect to the conversion layer, facing at least part of the lateral surface of the conversion layer, the reflective face of the reflector and the lateral surface of the conversion layer being separated from each other by a material having an optical index n2, and wherein the distance separating the reflective face of the reflector from the lateral surface of the conversion layer is comprised between λ / (n2x40) and λ / (n2x2), where λ is the average wavelength of the second radiation.

An optical microscope (200) comprising a light source (201) emitting illumination light (202), an optical device comprising a microscope objective (205), a resonator (212) placed between the optical device and the sample, comprising, successively in a direction of an optical axis of the microscope objective, a first layer having a first optical index, a spacer layer having a second optical index, and a waveguide layer having a third optical index, the second optical index being less than the first optical index and the third optical index, the resonator having a support surface facing away from the optical device and intended to receive the sample, and an optical detector (206),the optical device being arranged to collect light exiting the resonator,the outgoing light comprising light scattered (204) by the sample and a reflected non-scattered portion (215) of the illumination light.