26 results about "Refractive measurements" patented technology

The present invention discloses a lens refractive index measuring device, comprising a diopter measuring module, a confocal reflection measuring module and a lens to be measured; the diopter measuring module is used to detect the diopter of the lens to be measured, and the confocal reflection measuring module is used to detect the confocal reflection position of the upper and lower surfaces of the lens to be measured. The lens refractive index of the lens to be measured can be obtained by the measuring device without destroying the lens, and the operation is simple and the detection is fast. Moreover, the device is applicable to the refractive index measurement of ordinary lenses, aspherical lenses, cylindrical lenses and other irregular surface lenses. The lens refractive index measuring method of the present invention is simple to operate, has fast detection and high measurement accuracy.

1. The name of the product of this design: optometry instrument. 2. Purpose of this design product: used for measuring human eye aberration and refractive power. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: Stereoscopic diagram 1.

This application discloses a refractive screening instrument and its evaluation method, relating to the field of optometry technology. It includes a central processing and evaluation module; a pupil positioning and image capture module, which is signal-connected to the central processing and evaluation module. The pupil positioning and image capture module is used to lock onto the subject's eye and capture eye images to determine the pupil center reference point; and a first projection and sensing module. This application, by calibrating all measurement optical paths with the pupil center as a unified reference point, effectively eliminates alignment errors caused by micro-movements of the eyeball, ensures the consistency of multi-source data in spatial coordinates, and improves the repeatability and accuracy of measurements. This application combines basic refractive power measurement with higher-order aberration analysis, enabling not only the acquisition of conventional refractive powers such as spherical and cylindrical lenses, but also the quantitative detection of complex refractive problems such as irregular astigmatism and corneal morphological abnormalities by analyzing the distortion of the grid pattern.

This invention discloses a refractive measurement device and method for a microlens array on the surface of a spectacle lens. The refractive measurement device for the microlens array includes: a test module for accommodating a spectacle lens to be tested, the surface of which includes a microlens array; a light source module for providing a variable-aperture and collimated measurement beam; the measurement beam covers and passes through the microlens array; and a receiving module for simultaneously receiving the measurement beam after it has passed through the microlens array and obtaining its intensity distribution, determining the refractive value of each microlens based on the changes in the intensity distribution. This invention not only improves the accuracy of refractive measurement using a microlens array but also improves the measurement efficiency of the microlens array.

The invention provides a diopter measurement method, a storage medium and electronic equipment. The diopter measurement method comprises the steps of generating a diopter linear calculation function according to a relationship between diopter and a lens position; adjusting the position of the lens, and changing the distance between the lens and the to-be-detected eye; respectively acquiring fundus imaging images of the to-be-detected eye acquired by the image acquisition component at different lens positions; selecting a target fundus imaging image from all fundus imaging images according to a preset rule, wherein a lens position corresponding to the target fundus imaging image is a target lens position; and inputting the target lens position into the diopter linear calculation function to obtain a diopter measurement result of the to-be-measured eye. According to the scheme, the diopter of the to-be-measured eye can be obtained through linear calculation, the operation process is greatly simplified, and the diopter measurement efficiency is improved.

A method of correcting vision by a vision correcting apparatus including a focus adjustable lens, includes: determining a first dioptric power to match far focus, based on far vision of a user; determining a second dioptric power to match near focus, based on corrected near vision of the user measured based on the first dioptric power; determining at least one third dioptric power to be applied to the focus adjustable lens, based on the first dioptric power and the second dioptric power; and controlling the focus adjustable lens based on the at least one third dioptric power.

The invention discloses a contact lens (101). The lens (101) comprises an optical zone (102). The optical region (102) comprises a central region (105) having a center of curvature on an optical axis (119). The optical zone (102) comprises a first annular region (103). The first annular region (103) has an off-axis center of curvature at a first distance from the optical axis (119). The first annular region (103) has a sagittal diopter measure curve that increases with an increasing radial distance from the optical axis (119) with a gradient between 1.0 D / mm and 20.0 D / mm. The sagittal diopter matches an average radial sagittal diopter of the central region (105) at a point midway across the width of the first annular region (103).

The application provides a diopter measurement method, a storage medium and an electronic device, comprising: generating a diopter linear calculation function according to the relationship between diopter and lens position; adjusting the lens position to change the distance between the lens and the eye to be measured; acquiring fundus imaging images of the eye to be measured collected by an image acquisition component under different lens positions respectively; selecting a target fundus imaging image from all fundus imaging images according to a preset rule, and the lens position corresponding to the target fundus imaging image is a target lens position; and inputting the target lens position into the diopter linear calculation function to obtain a diopter measurement result of the eye to be measured. Through the above scheme of the application, the diopter of the eye to be measured can be obtained by linear calculation, greatly simplifying the operation process and improving the diopter measurement efficiency.

The application relates to the technical field of optical measurement, in particular to a mechanical-focusing-free, full-automatic, high-precision and portable lens diopter measuring device, which is characterized in that the application places a to-be-measured lens and a liquid lens coaxially in an imaging system to form an imaging system capable of adjusting total diopter through voltage. Then, the application collects a graphic sequence based on the imaging system, finds the best voltage value corresponding to the image with the largest definition, and finally substitutes the best voltage value into a pre-constructed diopter mapping model to perform relationship mapping of fusion temperature compensation and hysteresis compensation, so that the diopter of the to-be-measured lens is obtained. The liquid lens used by the application has a millisecond-level response, is matched with a high-frame-rate camera, and can complete single measurement within seconds. The lens does not have mechanical moving parts and is free of wear, has a long service life and good stability. The lens is based on an embedded system, has a small size, high integration and low manufacturing cost compared with a traditional automatic focal power meter. The measuring process and result are fully digitalized, and the lens is convenient for storage, tracing, remote transmission and further analysis.

The invention discloses a multifunctional eye parameter measuring instrument, which is characterized by comprising an axial length measuring system and a refractive measurement system, or an axial length measuring system and a corneal base map measuring system, or an axial length measuring system, a refractive measurement system and a corneal base map measuring system; the refractive measurement system comprises a measuring light reflector, a wedge-shaped semi-transparent reflector, a refractive LED light source, a refracting reflector, a front group collimating mirror, a rear group collimating mirror, a compound eye lens, a refractive image acquisition device and a calibration LED lamp. The invention organically integrates a variety of ophthalmic parameter measurement systems into one device, eliminates the error caused by switching, realizes one machine with multiple uses, and fully meets the needs of the ophthalmic market.

The application discloses an ophthalmic examination and measurement system and a control method thereof, comprising a biological measurement system, a refractive measurement system and an optical path propagation system; the optical path propagation system comprises an eyepiece with a ring-shaped light plate and a transmission mirror capable of transmitting and reflecting light. The biological transverse parameter, the biological longitudinal parameter and the refractive power of the eye can be measured by using a set of systems; the emission system of the refractive measurement system is configured with a checkered light spot generation module for generating a checkered light spot for irradiating the eye, so that the problem of poor resolution of the ring-shaped light spot in the prior art can be avoided, and the speed of judging the refractive state can be improved by comparing the checkered light spots formed in front and back, and the accuracy of the examination result is also improved.

Consumer products such as refractive measurement devices can be used to obtain refractive measurement results, allowing consumers to track their vision without visiting an optometrist or ophthalmologist. Such consumer products can work in conjunction with a smartphone or other product with a touch screen that presents an image to the refractive measurement device. Smartphones may have a resolution ratio, sometimes measured in PPI or pixels per inch that is unknown to the user and / or the refractive measurement device. One aspect of the present invention is to provide an optical interface for a user to manually match the viewing port boundaries of a smartphone to coincide with the viewing port boundaries of a refractive measurement device. Another aspect of the present invention is the use of pre-distortion in the image presented to the user. By noting the corrective actions applied by the user on the refractive measurement device, the user's own refractive error can be derived.

The application provides a double-optical-path refractive measurement type precision leveling machining platform and a working method thereof, and belongs to the technical field of ultra-precision plane machining equipment. In order to solve the problems of low machining precision and low efficiency of the existing plane machining, the machining platform comprises a supporting table, a machining device, a limiting component, a positioning component and a leveling component. The workpiece to be machined is placed on the machining device, and the limiting component can prevent the workpiece to be machined from rotating. The positioning component comprises a first laser emitter, a first photosensitive position sensor, a second laser emitter, a second photosensitive position sensor and a double-face transmission mirror. The positioning component can detect whether the workpiece to be machined is horizontal. The leveling component can adjust the inclination angle between the workpiece to be machined and the horizontal plane. The machining platform can realize plane machining of the workpiece to be machined, detect whether the workpiece to be machined is horizontal and level the workpiece to be machined, realize real-time monitoring and correction, and improve machining precision and machining efficiency.

The present disclosure provides a refractive power measuring device, which includes: a detection light source that emits detection light; a light source lens group that projects the detection light into an eye to be measured; an imaging lens group that includes an annular light spot forming unit; a light spot image extraction mechanism that collects an annular light spot image formed by the imaging lens group; and a control module that receives the annular light spot image information obtained by the light spot image extraction mechanism and determines a refractive power detection result. Further, the present disclosure provides a portable optometer. The refractive power measuring device and the portable optometer of the present disclosure can perform optometry in an objective manner, have a compact structure, and are convenient for refractive screening.

The invention discloses an automatic skiascopy optometry system and method based on reflected light velocity analysis, and the system comprises an incident light plate, an automatic lens assembly, a photoelectric detection mechanism and a calculation processor, the incident light plate is used for projecting a beam of incident light band with a fixed swing speed and a fixed width to human eyes, the photoelectric detection mechanism is used for receiving a reflection light band reflected by the human eye retina and generating an electric signal. The calculation processor is configured to continuously analyze the electric signals to calculate the moving speed and direction of the reflection light band; a closed-loop feedback is executed, and as long as the moving speed is not zero, the turntable is commanded to rotate so as to change the degree of the lens; and when the moving speed is zero, rotation is stopped, and the current lens degree is output as a refraction measurement result. Unification of measurement references is guaranteed through fixed incident light band projection, and objective and accurate refraction measurement is realized through signal analysis and closed-loop feedback automatic adjustment of the lens degree by the calculation processor.

The present invention discloses a method for measuring the diopter of an optical module of a head-mounted device, which is applied to the technical field of head-mounted devices. The method is applied to a diopter measurement device provided with a chart module, a collimating device, an optical module to be measured, and an image acquisition module along the light transmission direction, and includes: moving the chart in the chart module to an initial position in advance, where the initial position is obtained in advance; adjusting the position of the chart module, and obtaining each chart image of the chart through the image acquisition module; obtaining the chart position corresponding to the chart image with the highest clarity; calculating the diopter of the optical module to be measured based on the initial position, the chart position, and a pre-designed calculation relationship. The diopter measurement process in the present invention is simple, the measurement efficiency is high, the equipment cost is simple, and it can be applied to production testing. The present invention also discloses a device and equipment for measuring the diopter of an optical module of a head-mounted device, which have the same beneficial effects as described above.

The invention discloses a lens diopter and microstructure detection device and method based on diaphragm structure improvement, the lens diopter and microstructure detection device comprises a support table, a focusing assembly and an imaging assembly, the focusing assembly and the imaging assembly are both installed on the support table, a nested Hartmann diaphragm is installed on the imaging assembly, and the Hartmann diaphragm is installed on the support table. The lens to be measured is arranged between the nested Hartmann diaphragm and the focusing assembly, the optical axes of the nested Hartmann diaphragm, the lens to be measured, the focusing assembly and the imaging assembly are located in the same plane, and the nested Hartmann diaphragm comprises a microstructure observation area and a diopter measurement area nested in the middle of the microstructure observation area. A micropore array is arranged on the diopter measuring area, and a green light blocking film is arranged on the surface of the diopter measuring area. According to the invention, the problems of low detection efficiency and large manual error due to the adoption of multi-device operation in existing focal power detection and microstructure analysis can be solved.

The invention discloses an optical system for diopter measurement and a diopter measurement instrument, and relates to the technical field of diopter measurement. The optical system for diopter measurement comprises a projection light path and a measurement light path, the projection light path further comprises a projection light source, a diaphragm and a digital micro-mirror array shared by the measurement light path, the projection light source, the diaphragm and the measurement light path are sequentially arranged, the digital micro-mirror array comprises a plurality of micro-mirrors, each micro-mirror can independently deflect and has a first deflection state and a second deflection state, and the first deflection state and the second deflection state are different. The micro-reflector in the first deflection state can reflect a projection light beam projected by the diaphragm to the steering beam combiner, and the micro-reflector in the second deflection state is located on the path of the measurement light path; wherein the plurality of micro-reflectors in the first deflection state are matched to form a pixel pattern, and the plurality of micro-reflectors can be switched between the first deflection state and the second deflection state, so that the pixel pattern is changed to zoom a projection light path. According to the technical scheme provided by the invention, the measurement precision of the diopter is improved.

The invention belongs to the technical field of lens diopter measurement, and particularly relates to a high-precision lens diopter measurement system and method based on a microlens array, and the system comprises a green light LED light source, a beam expander, a collimating lens, a to-be-measured lens, the microlens array, ground glass and an area-array camera, the beam expander is arranged in the light path direction of the green light LED light source, and the collimating lens is arranged in the light path direction of the to-be-measured lens. The collimating lens is arranged in the light path direction of the collimating lens, the to-be-measured lens is arranged in the light path direction of the collimating lens, the micro-lens array is arranged in the light path direction of the to-be-measured lens, the ground glass is arranged in the light path direction of the micro-lens array, and the area-array camera is arranged in the light path direction of the ground glass. According to the invention, the green LED light source is adopted, the diopter of the to-be-measured lens is measured through the micro-lens array by collecting the light spot images before and after the to-be-measured lens is placed, and the whole system is simple in structure, high in precision and low in cost.

The invention relates to the technical field of optical measurement, in particular to a full-automatic, high-precision and portable lens diopter measuring device without mechanical focusing, and aims to coaxially place a to-be-measured lens and a liquid lens in an imaging system to form the imaging system capable of performing voltage regulation on total diopter. And then acquiring a graph sequence based on an imaging system, and finding an optimal voltage value corresponding to the image with the maximum definition. And finally, substituting the optimal voltage value into a pre-constructed diopter mapping model to execute relational mapping fusing temperature compensation and hysteresis compensation to obtain the diopter of the to-be-measured lens. The liquid lens used in the invention has millisecond-level response and cooperates with the high-frame-rate camera, so that single measurement can be completed within a second level. No mechanical moving part exists, abrasion is avoided, the service life is long, and stability is good. Based on an embedded system, the size is small, the integration level is high, and the manufacturing cost is lower than that of a traditional automatic lensometer. The measurement process and result are fully digitalized, and storage, tracing, remote transmission and further analysis are facilitated.

The embodiment of the invention discloses a diopter measurement system and method and a related device. The diopter measurement system comprises a watching assembly, an illumination assembly, a scanning assembly, an imaging assembly and a measurement assembly, wherein the scanning assembly is used for adjusting the angles of telecentric light and scattered light entering the eyes of a user, receiving fundus reflected light of the eyes of the user, adjusting the emergent angle of the fundus reflected light and guiding the fundus reflected light to the measuring assembly; the imaging assembly is used for carrying out iris imaging on the human eyes of the user, determining the central position of the human eyes of the user and determining cornea curvature related parameters of the human eyes of the user through cornea reflected light; and the measuring assembly is used for generating infrared light, guiding the infrared light to the scanning assembly, emitting the infrared light to the human eyes of the user through the scanning assembly, receiving infrared reflected light of the human eyes of the user to the infrared light, and determining related parameters of the diopter of the human eyes of the user according to the infrared reflected light. In this way, refraction measurement at different angles is achieved, and meanwhile the function of measuring relevant parameters of the human cornea curvature is integrated.

The utility model discloses a computer optometry unit which comprises a shell, a measuring light source light path, a diopter measuring light path, a corneal curvature measuring light path and a fixation light path, wherein the measuring light source light path, the diopter measuring light path, the corneal curvature measuring light path and the fixation light path are arranged in the shell. The measurement light source light path provides first light source light; the diopter measurement light path obtains incident measurement light from the first light source light, outputs the incident measurement light to human eyes, and receives first reflection measurement light reflected back by the human eyes; performing image acquisition on the first reflection measurement light to obtain a first image for measuring the diopter; the corneal curvature measuring light path provides second light source light for human eyes; second reflection measurement light reflected back by the human eyes is obtained; performing image acquisition on the second reflection measurement light to obtain a second image for measuring the corneal curvature; the fixation optical path provides sighting marks for human eyes. The diopter and the corneal curvature of the human eye can be measured at the same time, the measurement accuracy is high, ophthalmic examination is more comprehensive, and practicability is higher.

The present invention provides an intelligent self-service diopter measurement system, comprising: a sight mark display device, used to display a sight mark to a testee; a camera, used to capture a frontal image of the testee; biased glasses, used to provide a biased diopter for the testee, and the biased diopter is determined according to the testee's historical diopter; a feedback device, through which the testee feeds back a sight mark recognition result to a central controller; and a central controller, used to obtain a distance between the testee and the sight mark according to the frontal image of the testee output by the camera, and obtain a diopter test result by combining the distance, the sight mark recognition result and the biased diopter. The diopter of the testee is undercorrected to a certain extent by the biased glasses, so that the diopter measurement range to be performed later is smaller, and a higher measurement accuracy can be achieved, and the test speed can be accelerated. At the same time, the moving distance range required for the testee's diopter measurement can be shortened, and a self-service diopter test is realized.

The invention discloses optical thin film parameter nondestructive measurement equipment and method, and the equipment comprises a sample stage, the sample stage is provided with a light through hole, the sample stage is used for placing a thin film sample, the interior of the sample stage is a hollow light trap, and the light trap is used for absorbing transmission light passing through the thin film sample; the measuring equipment is further provided with an optical measuring system, and an intelligent program is arranged in the optical measuring system. The optical thin film parameter nondestructive measurement device and method have the advantages of being rapid, convenient, low in cost, optical, non-contact and nondestructive in measurement, a measured sample does not need to be pretreated when optical thin film thickness and refraction measurement is carried out, the measurement process is greatly simplified, and the sample is still intact after measurement is completed.

The application provides a method and device for determining the diopter of a tunable optical device and the optical device, comprising: performing interference removal processing on an initial point cloud subset of a polymer layer to obtain a target point cloud subset; determining a center region warping amount of an effective polymer layer region based on the target point cloud subset; and determining the diopter of the tunable optical device according to the center region warping amount. Thus, due to the elastic deformation of the polymer layer caused by the change of the driving voltage, the curvature radius of the polymer layer and the diopter will change. After the elastic deformation of the polymer layer, the three-dimensional point cloud data of the film layer is analyzed to obtain the center region warping amount of the effective polymer layer region, and finally the diopter is calculated according to the center region warping amount and a mapping function. The whole process can be realized by only one three-dimensional topography measuring device, the measurement cost is low, the diopter of all tunable optical devices can be measured, and the overall quality of the tunable optical device is ensured.

The invention relates to a retina peripheral defocus detection method and system in the technical field of optical detection, and the method comprises the following steps: driving a moving lens to a preset fogging position, and guiding a user to perform fogging relaxation; keeping a fogging relaxed state, and controlling the mobile lens to execute diopter scanning from a preset fogging position according to a preset step length; controlling the movable lens to axially move within the diopter measurement range at a preset step length, acquiring an image stack after each axial movement to obtain a second image sequence, performing registration processing, identifying center coordinates of all projection light spots, and delimiting a region of interest; calculating a definition evaluation value in each region of interest, and calculating a spherical power; according to the method, astigmatism degree calculation and astigmatism angle calculation are carried out to obtain astigmatism degrees and astigmatism axial positions, the astigmatism degrees and the astigmatism axial positions are mapped to a retina coordinate system, a continuous retina peripheral defocus topographic map is output, and the problem that an existing peripheral defocus detection method excessively depends on fundus natural textures, so that peripheral measurement precision is poor is solved.