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37 results about "Visual optics" patented technology

Visual optics analysis system based on wave-front abberration

A visual optical analysis system based on a wave-front aberration is provided, which belongs to the technology field of medical optics. In the invention, a first light splitter is positioned between a light diaphragm and a cornea, the emergent light from a Placideo's disk passes through a second light splitter and a third light splitter and then is projected onto the surface of the cornea, the emergent light from the cornea is reflected by a fourth light splitter to a corneal topography imaging system, the corneal topography imaging system is positioned between a first aperture-matching system and a monitoring CCD, an astigmatism compensation system is positioned between the first aperture-matching system and a beam-splitting prism, a part of the emergent light reflex from the beam-splitting prism passes through a second aperture-matching system and then one part thereof reaches an object and the other part radiates to a Shack-Hartmann wave-front sensor, the emergent light from the beam-splitting prism is partially transferred to a deformable mirror, an imaging objective lens is provided between a fifth light splitter and the object, and the Shack-Hartmann wave-front sensor and the deformable mirror are respectively connected with a computer. The visual optical analysis system realizes the data acquisition of human eye aberration and corneal topography, as well as correction of the human eye aberration.
Owner:SHANGHAI JIAO TONG UNIV

Array of progressive ophthalmic lens elements

ActiveUS20090290125A1Acceptable fusionIncrease and decrease angular sizeSpectales/gogglesEye diagnosticsPhysicsLens plate
An array of progressive ophthalmic lens elements is disclosed. The progressive ophthalmic elements contained in the array having substantially the same addition power and substantially the same optical prescription for distance vision. Each of the progressive ophthalmic lens elements has a progressive lens design characterised by a set of parameters defining a distance zone providing a refracting power for distance vision, a near zone providing a refracting power for near vision and a corridor having a refracting power varying from that of the distance zone to that of the near zone. The progressive ophthalmic lens elements provide, for a range of values or categories of at least two lifestyle and / or biometric parameters of lens wearers, different progressive lens designs in which at least two of the lens design parameters each have a respective value or characteristic attributable to, or associated with, a particular value or category of a respective one of the lifestyle and / or biometric parameters.
Owner:CARL ZEISS VISION AUSTRALIA HO +1

Visual optics analysis system

A visual optical analysis system is provided, which belongs to the technology field of medical optics. In the invention, the emergent light from a collimated laser source passes through a first light splitter and then is reflected to a cornea, the light from a flash lamp passes through an optical grating and a light-filtering projection system and then is projected onto a second light splitter, the second light splitter is positioned between the light-filtering projection system and the first light splitter, a third light splitter is provided between an aperture matching system and an imaging objective lens, an object is provided outside the third light splitter, a fourth light splitter is provided between the third light splitter and the light-filtering projection system, a part of the emergent light reflex from the cornea passes through the light-filtering projection system and then reaches a monitoring CCD, a defocusing compensation system is provided inside the aperture matching system, an astigmatism compensation system is positioned between the aperture matching system and a Shack-Hartmann wave-front sensor, and the Shack-Hartmann wave-front sensor is connected with a computer. The visual optical analysis system can accurately detect the corneal topography and the total aberration of human eyes and also accurately calculate the corneal aberration and the intraocular aberration.
Owner:SHANGHAI JIAO TONG UNIV

Gasket size detection system and method based on machine vision, processing terminal and medium

PendingCN112893172ARealize data queryRealize analysisSortingMachine visionEngineering
The invention discloses a gasket size detection system and method based on machine vision, a processing terminal and a medium, and relates to the technical field of gasket quality detection and visual optical design. In order to solve the problems that in the prior art, unqualified products cannot be removed in real time, random angle detection cannot be carried out, the method cannot adapt to actual production, the labor intensity is increased, and the maintenance cost is high in the prior art, the number of products in an image is judged, affine transformation is carried out on the products at the specific positions, and background interference is removed; secondly, the to-be-detected gasket is positioned, and the measured position of the to-be-detected gasket is subjected to contour extraction; and finally, the actual size of the to-be-detected gasket is calculated according to the proportional relation between the view field range of the image acquisition equipment and the image pixels. The problem of noisy points caused by optical interference is avoided; according to camera size detection, the placement direction of the workpiece is random, detection can be carried out when the workpiece exists in the collected image, position and angle correction is carried out on the detected object through an algorithm, and feeding consistency is achieved.
Owner:菲特(天津)检测技术有限公司

Image acquisition system and method based on gear shaft visual detection, product, equipment and terminal

The invention discloses an image acquisition system and method based on gear shaft visual detection, a product, equipment and a terminal, and relates to the technical field of gear shaft product defect detection and visual optical design. A shooting station is arranged, the upper and lower end surfaces and the upper and lower tooth surfaces of a gear shaft respectively use a set of independent shooting units which are respectively used for detecting surface defects of the upper and lower end surfaces and the upper and lower tooth surfaces of the gear shaft; end surface shooting units are arranged, the shooting units shooting the upper and lower end surfaces are mirror images of each other along the tooth surfaces, and the upper and lower end surface areas of the gear are shot; tooth surface shooting units are arranged, the shooting units shooting the upper and lower tooth surfaces are mirror images of each other along the axis of the gear, and the upper and lower tooth surface areas are shot. According to the optical design system, the picture information of each surface of the gear shaft is effectively collected, the number of cameras and light sources is reduced, mechanical motion scheme design is facilitated, and potential risks and equipment maintenance cost are reduced. When the optical design system is implemented, an original gear shaft production line does not need to be broken, and shooting can be completed only by stopping on the original production line.
Owner:菲特(天津)检测技术有限公司

Simulation optical eye function model

PendingCN112150903AIrreversible long-acting scleral mechanismEducational modelsEngineeringRetina
The invention discloses a simulation optical eye function model, and belongs to the technical field of simulation eye models for teaching. The model comprises an optical bench base, a light source assembly, a cornea assembly, an iris assembly, a lens assembly and a retina assembly, the optical bench base comprises a first base plate, a second base plate, a first guide rail and a second guide rail,the first and second base plate are separately provided with guide rail insertion holes, and the two ends of the first guide rail and the second guide rail are arranged between the first seat plate and the second seat plate in parallel in a penetrating mode through the guide rail insertion holes; and base sliding blocks of the light source assembly, the cornea assembly, the iris assembly, the crystalline lens assembly and the retina assembly are installed on the first guide rail and the second guide rail through a first sliding hole and a second sliding hole and can slide along the rails. Themodel can be used for demonstrating the optical function of human eyes and simulating the biological characteristic change of optical structures of the eyes, so that the influence of the optical structures on light refraction and aberration is understood, a calculation method used for visual optics is used for calculating and correcting the refraction problem, and the problem which is difficult to understand by eye optics is visualized.
Owner:北京恒康敏科技有限公司

Frame glasses adaptability detection and evaluation method

PendingCN108107605AMinimize misfitsProtect vision developmentSpectales/gogglesVisual functionFacial skin
The invention discloses a frame glasses adaptability detection and evaluation method, which is designed for detecting and evaluating the adaptability effect of frame glasses and the head and face partof a person needing a pair of glasses in real time. The method is characterized in that a coordinate point and a displacement measurement point are respectively arranged on the adaptive frame glassesand the head and face skin of the person needing a pair of glasses; after the person needing a pair of glasses does habitual activities, offset data of each measuring point is read; the offset data and optometry data of the person needing a pair of glasses are jointly substituted into a mathematical model for operation; the adaptability is comprehensively evaluated. The method belongs to initiative application to the technical field of visual optics glasses dispensing science, breaks through a frame glasses adaptability effect evaluation technology, and provides an important theoretical verification and judgment basis and operation flow process for building followable, objective and consistent glasses dispensing evaluation standards; important contribution is made in aspects of protectingthe human visual development and improving the visual function. The method has the advantages that the technology is scientific; the measurement is precise; the operation is convenient; the method issuitable for comprehensive detection and evaluation on the adaptability with the head and face of the person needing a pair of glasses in different environments; through the application, the occurrence of conditions of glasses incompatibility can be greatly reduced; social benefits and economic benefits are great.
Owner:PEKING UNIV THIRD HOSPITAL

Positioning method, visual map generation method and device

The invention provides a positioning method, a visual map generation method and a visual map generation device, and relates to the technical fields of computer vision, optical character recognition, intelligent traffic and augmented reality in the technical field of artificial intelligence. According to the specific implementation scheme, a parking space number corresponding to a parking space image is obtained, three-dimensional coordinates and three-dimensional poses of the parking space number in a world coordinate system are obtained according to the parking space number and a visual map, the visual map is generated according to the parking space number, and a first conversion matrix from a camera coordinate system to a parking space number coordinate system is obtained; the parking space number coordinate system is constructed according to the parking space numbers, and the three-dimensional coordinates and the three-dimensional poses of the camera in the world coordinate system are determined according to the first conversion matrix and the three-dimensional coordinates and the three-dimensional poses of the parking space numbers. According to the method, positioning is achieved without excessively depending on visual features, the method is not affected by factors such as environment and texture repeatability, the positioning effect is enhanced, and the method is easy to rapidly deploy and landing and low in later maintenance cost.
Owner:BEIJING BAIDU NETCOM SCI & TECH CO LTD

Visual optic sensing method for detecting target-mediating agglutination reaction of nano-gold probes on the basis of Tyndall effect

The invention discloses a visual optic sensing method for detecting a target-mediating agglutination reaction of nano-gold probes on the basis of Tyndall effect. In the method, by means of an analyticsubstance in a sample solution, a reaction solution, which contains a target capable of mediating the agglutination reaction of naked nano-gold probes or biofunctionalized composite nano-gold probes,can be obtained; then the reaction solution is mixed and reacted with a nano-gold probe solution in order to observe an optical signal of the Tyndall effect of the mixed solution under laser beam formed by a laser pen or a laser device, wherein the signal intensity is in positive correlation with the concentration of the analytic substance. Through a cheap portable device for reading the signal (i.e. the optical signal of the Tyndall effect), low-cost portable quantitative detection of the analytic substance is achieved. The method has simple operations and low cost, is free of special analytic instruments and equipment and is suitable for on-site analysis and real-time detection, and can be directly promoted in the fields such as medical diagnosis, environment monitoring, food safety andthe like.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY

Systems and methods for generating search results based on optical character recognition techniques and machine-encoded text

Disclosed are systems and methods for generating search result data based on machine-encoded text generated by computer vision optical character recognition machine learning techniques performed on digital media. The disclosed systems and methods provide a novel framework for performing machine learning visual search or machine learning text extraction techniques on digital media in order to extract and analyze the data therein and further conduct search queries based on the extracted and analyzed data. The disclosed framework may leverage the aforementioned computer vision machine learning techniques in order to provide a user with relevant search results regarding objects and text detect in digital media captured on a user device.
Owner:YAHOO ASSETS LLC

Machine vision optical detection system and method

PendingCN114354493APresence of surface defectsInternal defectMaterial analysis by optical meansCleaning using toolsMachine visionEngineering
The invention relates to the technical field of detection equipment, and particularly discloses a machine vision optical detection system and method.The machine vision optical detection system comprises a vision optical detection body, a transmission mechanism, a first transmission belt, a second transmission belt, a driving assembly, a leading-in mechanism, a leading-out mechanism and a wiping mechanism; the driving assembly is arranged on one side of the transmission mechanism, the first transmission belt is arranged on one side of the transmission mechanism, the leading-in mechanism is arranged on one side of the first transmission belt, the wiping mechanism is arranged between the first transmission belt and the transmission mechanism, the second transmission belt is arranged on one side of the transmission mechanism, and the leading-out mechanism is arranged on one side of the transmission mechanism. And the guide-out mechanism and the second transmission belt are oppositely arranged. Through the arrangement of the structure, dust on the surface of the transparent plate body can be effectively cleaned, the detection result of the visual optical detection body is prevented from being influenced, and the detection result is more accurate.
Owner:南京双星塑料模具有限公司
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