110results about "Lens position determination" patented technology

The invention relates to a method for measuring optical lenses (10) using a device (1) comprising: a detection device (11) arranged on a first side (10a) of the lens (10) with respect to a plane of extension of the lens (10); one or more first radiation sources (12) with which the position of the lens (10) in space is determined; and / or a second radiation source (13) with which a planar refractive power distribution of the lens (10) over the surface is determined. According to the invention, a planar, moving pattern extending through the lens (10) is generated by the second or a further radiation source (13), which is detected by the detection device (11) through the lens (10), and one or more defects (15) on the surface of the lens (10) are detected by the computer unit (14).

The invention provides a lens optical axis consistency inspection device and a detection method thereof, and relates to the technical field of lens optical axis consistency, and the lens optical axis consistency inspection device comprises an optical platform as an installation reference, a target plate structural member which is fixed on the platform and is provided with a first cross mark, and a fixed seat structural member which is spaced from a target plate by a preset distance and is used for installing a to-be-detected lens module. The method is characterized in that the lens optical axis consistency is evaluated by comparing the position deviation between a target plate mark image acquired by a lens module and a second mark generated by a sensor. According to the invention, a simple mechanical structure is used for replacing a traditional expensive and complex instrument, and through a unique double-label comparison principle, not only can rapid qualitative screening be realized, but also accurate quantitative calculation can be carried out. The device has the outstanding advantages of low cost, simplicity and convenience in operation and high detection efficiency. The design effectively solves the problem of rapid detection of the consistency of the batch lens centers of the production line, significantly reduces the detection threshold and cost, and is of great significance to the improvement of the product quality control level.

The invention belongs to the technical field of optical system aberration analysis, and discloses an experimental device for measuring and correcting image distortion of an optical imaging system, which comprises an optical axis testing device and an optical distortion testing platform, and the optical distortion test platform is used for testing optical distortion of the optical imaging system to be tested and integrating optical distortion data with optical axis deviation to obtain an image distortion fitting coefficient and a distortion correction model of the optical imaging system. According to the invention, the image distortion of the optical imaging device can be measured, the image distortion can be corrected, the imaging device can correct the deviation between the optical axis and the center of the target surface when the system is installed and adjusted, the optical distortion of the whole optical system can be corrected, and the method has guiding significance for the application of detecting and identifying the accurate position of a target by using the optical system.

The purpose of the present invention is to provide an information processing device, an information processing method, and a program which make it possible to appropriately identify a lens from an image indicating a cross section of the lens.　In the present invention, a processor detects a presence region of a lens in a target image indicating a cross section of a part including the lens in target equipment provided with the lens. By means of an identification model constructed by machine learning using a plurality of images that are for learning and that indicate cross sections of lenses, the processor identifies the lens of the target equipment, present in a presence region, on the basis of a feature quantity of the presence region.

The present invention relates to a laser device, which includes a laser oscillator, a mirror frame assembly, a corrector, a diagnostic module, a calculation module and a controller. The diagnostic module re-diagnoses whether the optical path distortion occurs by re-calculating the optical path difference between the processing optical path changed by the drive motor according to the target drive speed and the target drive time and the reference processing optical path. When the re-calculated optical path difference is greater than the reference optical path difference, the calculation module re-calculates the target drive speed and the target drive time based on the re-calculated optical path difference, and the controller re-drives the drive motor according to the re-calculated target drive speed and the target drive time.

A method of determining an angle of repose of a contact lens on an eye of a user of the contact lens, the method comprising, at a computing device 100: obtaining data indicative of a refractive error

The invention discloses a device and a method for synchronously detecting the focal length and the surface topography of a micro-lens array, which can realize synchronous detection on the focal length and the surface topography of the micro-lens array through a set of system, realize mutual matching between two parts of results and greatly shorten the detection time. The device comprises a first monochromatic laser light source (1), a first collimating lens (2), an attenuation sheet (3), a reflector (4), a microlens array sample (5), a microscope objective (6), a barrel lens (7), a first quarter-wave plate (8), an area array detector (9), a first monochromatic optical filter (10), a second monochromatic laser light source (11), a second collimating lens (12), a linear polarizer (13), a beam splitter prism (14), a polarization beam splitter prism (15), a second quarter-wave plate (16) and a reference lens (17). A third quarter-wave plate (18), a second monochromatic optical filter (19) and a polarization camera (20).

Described is camera focusing including lens centration estimation using variable focal length phased metalenses. Camera modular alignment and test (CMAT) equipment checks the modular transfer function (MTF) performance of lenses and an image sensor. The CMAT equipment positions a variable focal length phased metalens between the lenses and the image sensor. The metalens includes multiple segments that provide a variable focus depending on distance and angle from boresight of the image sensor. By measuring optical characteristics of the lenses at two opposing segments of the metalens, defocusing effects and a lens centration tilt vector can be computed. Repositioning the lenses to align the centration tilt vector with the boresight of the image sensor improves the MTF performance. A final camera assembly with lenses in precise alignment with the image sensor can be produced, which may improve production output by increasing pass rate at an end of line tester.

A system can perform a method to identify when one or more lenses are the wrong prescription for the user. In some embodiments, the system notifies the user to switch prescription lenses or initiates an enrollment process for the lenses. In some embodiments, the system can identify the prescription of a lens and compare the identified prescription to one or more enrolled prescriptions for the user (e.g., previously defined in user settings associated with user profile). When the identified prescription of the lens does not match an expected enrolled prescription for the user), the system can notify the user to switch prescription lenses. When there are no enrolled prescriptions for the user, the device can prompt the user to enroll the lens.

Disclosed is a method and apparatus for determining information about an alignment of one or more optical components of a multi-component assembly involving: detecting an optical interference pattern produced from a combination of at least three optical wave fronts including at least two optical wave fronts caused by reflections from at least two surfaces of the one or more optical components; and computationally processing information derived from the detected optical interference pattern with at least one simulated optical wave front derived from a model of at least one selected optical surface of the at least two surfaces to computationally isolate information corresponding to an alignment of the selected optical surface.

To provide an apparatus and method for measuring a center deviation of a contact lens capable of quickly and accurately detecting an off-center defect of a contact lens, thereby reducing a defect rate and increasing production efficiency.SOLUTION: An apparatus for measuring a center deviation of a contact lens includes a data augmentation unit configured to augment original contact lens image data photographed during a contact lens manufacturing process, an artificial intelligence learning unit configured to use a dataset augmented by the data augmentation unit as an input to conduct learning through an artificial intelligence learning model, and detect a center point of a colored area and a center point of a frame area of the contact lens through learning, and a measuring unit configured to measure the center deviation using the center point of the colored area and the center point of the frame area detected through the artificial intelligence learning model in the artificial intelligence learning unit.SELECTED DRAWING: Figure 13

The application discloses a kind of optical lens optical axis angle determination method, device, equipment and medium, the optical axis angle determination method first provides a test chart;Test chart is by checkerboard and a plurality of target test patterns inlaying into;Then the image information of each target test pattern is collected by optical lens, and the position of corresponding optical lens and / or image sensor is moved, so that the image field of optical lens is parallel to the imaging surface of image sensor, and the line of the optical center of optical lens and the image center of image sensor is perpendicular to the imaging surface of image sensor;Then the distortion center of optical lens is identified by the corner point position information of checkerboard;The line of the optical center of optical lens and the distortion center of optical lens is parallel to the optical axis of optical lens;Finally, according to the position of the optical center of optical lens, the position of the image center of image sensor and the position of the distortion center of optical lens, the inclination of the optical axis of optical lens relative to the image field of optical lens is determined.

The invention discloses an optical element, a lens device, an image pickup device, and a method for identifying the optical element. An optical element includes a region satisfying the inequality 50 nm < = PV < = 1000 nm, where PV represents a PV value, which is a difference between a maximum value and a minimum value of [Delta] f ([theta]) obtained by removing a primary symmetric component and a secondary symmetric component about an optical axis from f ([theta]), wherein f ([theta]) represents a position of the optical surface in the optical axis direction on a circumference at a first radius of 60% or more and 100% or less of the optical effective diameter with respect to a position [theta] in the rotation direction about the optical axis.

The invention discloses an integrated detection device and method for the shape of a large-aperture long-focal-distance axis lens, belongs to the shape detection of an off-axis lens in precision optics, and aims to solve the technical problem that the shape parameters of the off-axis lens cannot be integrally detected. The device comprises a large-aperture plane interferometer, a to-be-measured lens, a large-aperture computer-generated hologram plate, an attitude alignment module and a precise distance measurement module. A main test area, an alignment area and an off-axis calibration area are arranged on the large-aperture computer-generated hologram plate; and the attitude alignment module and the precision distance measurement module are respectively configured on a tool of a lens to be measured and a tool of a computer-generated hologram plate. The detection method comprises the following steps of: obtaining a background wavefront of the computer-generated hologram detection cavity by adopting a large-aperture standard spherical lens; the pose adjustment of the large-aperture computer-generated hologram plate and the to-be-measured lens is completed based on the large-aperture plane interferometer; measuring the transmission wavefront of the lens to be measured and deducting the background wavefront; and measuring and calculating the rear intercept of the to-be-measured lens, and calculating the off-axis amount by combining the off-axis angle.

This invention proposes a device and method for detecting the optical axis pointing of a focusing light source emitting optical system, enabling high-precision measurement of the optical axis pointing of the focusing light source emitting optical system during the focusing process. This invention utilizes a long-distance linear motion platform and a spot position detection device to record the convergence position of the emitted light from the focusing light source emitting system at different spatial locations, calculates the change in the optical axis pointing of the system during focusing, and measures the position change of the spot over a long distance by directly receiving the emitted light spot from the focusing optical system, thus solving the problem of high-precision measurement of the optical axis pointing of the focusing light source emitting optical system during the focusing process.

Method and system for determining an optic centre of a lens blank (1) and comprising the following steps: - providing a light source (2) and a visualization module (3); - positioning said lens blank (1) between them; - illuminating the lens blank (1); - visualizing a spot (5) obtained from the light passing through the lens blank (1); - inducing a relative displacement between the visualization module (3) and the lens blank (1) in order to move the spot (5) closer to a reference point (32); - repeating the previous steps until a distance between the reference point (32) and the spot (5) fulfils a distance criterion; - determining a position of an optic centre of the lens blank (1) by using the magnitudes of the performed displacements.

This invention relates to a machine for measuring the optical properties of lens belonging to a pair of glasses comprising: - A light emitting system for emitting a light beam; - A receiver arranged for receiving said light beam; - An alignment system configured to align said glasses lens according to a predetermined measuring position; - A gripping system configured to carry out the gripping of said glasses; - A supporting system on which the glasses or single lens are placed in use; - Said alignment system is arranged at a distance from the emitter in such a way that at least the lower support element is not intercepted by the light beam, the gripping system is in closed configuration once the alignment has been carried out and then is performed a subsequent shifting of the support structure to bring the glasses lens under said emitter.

This application discloses an optical detection device, comprising: a light source, a linear polarizer, a quarter-wave plate, an optical metasurface, and a light detection unit. The linear polarizer, quarter-wave plate, and metasurface are sequentially arranged along the propagation direction of the incident light. The metasurface comprises a transparent substrate layer and a dielectric nanocolumn layer. The fast axis of the quarter-wave plate has a first angle. When the first angle is a first characteristic angle, the light emitted from the quarter-wave plate is circularly polarized light. The light detection unit detects the optical power of the light emitted from the metasurface in a second angular direction, and obtains a second characteristic angle from the maximum optical power. The refraction angle is obtained from the wavelength of the incident light, the geometric parameters of the metasurface, and the refractive index of air. When the refraction angle is equal to the second characteristic angle, the first angle is the first characteristic angle. This device does not use a modulator or spectrometer, but only requires the pre-fabrication of the metasurface, which greatly reduces the device size and achieves miniaturization and integration.

An apparatus for measuring a center deviation of a contact lens includes a data augmentation unit configured to augment original contact lens image data photographed during a contact lens manufacturing process, an artificial intelligence learning unit configured to use a dataset augmented by the data augmentation unit as an input to conduct learning through an artificial intelligence learning model, and detect a center point of a colored area and a center point of a frame area of the contact lens through learning, and a measuring unit configured to measure the center deviation using the center point of the colored area and the center point of the frame area detected through the artificial intelligence learning model in the artificial intelligence learning unit. There is an effect of quickly and accurately detecting an off-center defect of a contact lens, thereby reducing a defect rate and increasing production efficiency.

A system is disclosed for determining optical correction information of optical equipment. The system includes a camera system for capturing at least one camera image, a target, toward which the camera system is directed, a detection area between the camera system and the target for receiving the optical equipment including at least one lens, and a processing system with a searching routine for determining at least one center of the at least one lens based on the at least one camera image of the target via the optical equipment.

This invention relates to a high-precision measurement device and adjustment calibration method for optical axis deviation in multi-aperture imaging systems, belonging to the field of multi-aperture imaging technology. Addressing the problems of current measurement devices being bulky, heavy, and expensive, this invention includes a mounting substrate and an optical axis deviation adjustment component. The multi-aperture imaging system is located on one side of the reflected light path of the optical axis deviation adjustment component. The optical axis deviation adjustment component includes a collimating light source, multiple beam splitting elements, a large-aperture plane mirror, and a light spot acquisition and analysis device. The large-aperture plane mirror completely encloses the optical axis of the multi-aperture imaging system. By adjusting the large-aperture plane mirror, the light beam reflected by N1 returns and is transmitted through N1, then focused at the focal point of the focusing lens, making the centroid of the light spot close to the center coordinates of the area array photodetector. Similarly, other beams reflected by N1 are focused at the focal point of the focusing lens. i The centroids of the reflected light spots are all located at the same position as the centroid of the N1 light spot, thus enabling the calibration of the optical axis deviation of the multi-aperture imaging system.

A surface shape of first face (8a) of lens (8) is measured with shape measurement unit (2) to determine a center position of first face (8a) of lens (8) from a measurement result, lens (8) is positioned in transmission wavefront measurement unit (3) based on the center position of first face (8a) of lens (8) and a relative position between shape measurement unit (2) and transmission wavefront measurement unit (3), a transmission wavefront of lens (8) is measured with transmission wavefront measurement unit (3), and an optical characteristic of lens (8) is obtained from the transmission wavefront.

The embodiment of the invention provides a bonding system and a bonding method for bonding a lens with an image sensor. The bonding system includes a detection system for detecting the position and inclination of the lens and / or the image sensor in order to improve alignment between the lens and the image sensor during bonding. The detection system comprises an optical device used for detecting the position of the lens and / or the image sensor, and a sensing device used for detecting the inclination of the lens and / or the image sensor relative to a reference plane. The optical adjusting device is used for guiding light beams reflected by the lens and / or the image sensor to the optical device and the sensing device, so that the position and the inclination of the lens and / or the image sensor are detected at the same time through the optical device and the sensing device respectively.

This invention discloses a lens focal length measurement method based on vortex light interferometry, comprising the following steps: constructing a measurement system for vortex light and spherical wave interference; acquiring the interferogram I1(x,y) of the vortex light and spherical wave interference, the interferogram I2(x,y) for center positioning, the parallel light spot pattern I3(x,y), and the converging light spot pattern I4(x,y); obtaining the center coordinates (x0,y0) of the effective image of the interferogram I2(x,y), and cropping the effective image region I from the interferogram I1(x,y) based on the center coordinates. R (x,y); Get I R The maximum light intensity point distribution map I5(x,y) is obtained by transforming I5(x,y) to the polar coordinate system, resulting in the maximum light intensity point distribution map I6(θ,r) in the polar coordinate system. Periodic reconstruction of I6(θ,r) yields the maximum light intensity point distribution map I... m (θ,r), and for I m The points in (θ,r) are fitted to obtain the fitting result a; the acquired parallel light spot image I3(x,y) and converging light spot image I4(x,y) are binarized to obtain the binarized images I'3 and I'4, and the ratio β of their spot sizes is calculated; the focal length f = βa of the lens under test is calculated from the fitting result a and the ratio β of the spot sizes. The measurement optical path structure of this invention is simple, the measurement error is small, and the measurement accuracy is high.

The present application relates to the technical field of confocal adjustment, and particularly relates to a large-aperture segmented telescope discretization confocal testing and adjustment method, which comprises the following steps: S1: placing a microlens array on the focal plane of the segmented telescope to rearrange the spatial frequency of the focal point of the segmented telescope; S2: performing differential operation on the light intensity of each light spot and the light intensity of the central sub-aperture to obtain the distance from each light spot to the central sub-aperture; S3: performing testing in each direction by using an eight-neighborhood algorithm according to the distance from each light spot to the central sub-aperture to determine the adjustment step and direction of the segmented telescope; and S4: adjusting the spliced sub-mirror of the segmented telescope according to the adjustment step and direction to maximize the energy of the central sub-aperture. The microlens array is used to rearrange the spatial frequency of the focal point, and higher-precision confocal testing and adjustment are finally achieved.

The invention relates to a method for measuring the frame lens angle of spectacles, having the steps of arranging (100) the spectacles, which have a first spectacle lens and a second spectacle lens, on a spectacles receiving area. The surfaces of the two spectacle lenses of the spectacles are scanned (110) by means of a scanner in order to generate first surface position data points of the first spectacle lens and second surface position data points of the second spectacle lens. The first surface position data points of the first spectacle lens are mirrored (120) onto the second surface position data points of the second spectacle lens with respect to a central plane (M) between the two spectacle lenses such that the first and second surface position data points of the two spectacle lenses are superimposed. A compensation function (A) is ascertained (121) as a surface function using the superimposed surface position data points of the two spectacle lenses, and the frame lens angle is ascertained (160) by means of the surface function using the superimposed surface position data points of the two spectacle lenses.

The application provides a universal pneumatic self-centering gravity unloading device, which comprises a bottom plate, a lining plate, a cylinder, a support column, a guide column, a displacement sensor, a lifting motor and a gas supply control cabinet, the bottom plate supports the lining plate, and the cylinder, the support column, the guide column, the displacement sensor and the lifting motor are installed on the bottom plate; the cylinder is connected with the gas control system through a gas circuit and is used for providing unloading support force; the three guide columns are uniformly distributed at the edge of the bottom plate with a separation of 120 degrees, so as to limit the position of the lining plate; the displacement sensor and the lifting motor are uniformly distributed on the bottom plate with a separation of 120 degrees, and the position of the lifting motor is consistent with the position of the mirror nest; the support column is used for supporting the lining plate on the bottom plate, the lining plate supports the mirror, and the lining plate is processed with through holes corresponding to the positions of the cylinder, the guide column, the displacement sensor and the lifting motor; the application meets the vertical detection requirement of the optical axis of the mirror with an aperture of 4m, the unloading force is accurately controllable, the centering speed of the mirror on the device is fast, the accuracy is high, and the detection efficiency is improved.

The application discloses a focusing calibration method and an exposure compensation method with an automatic focusing function, determines the relationship between the movement amount of an AF mechanism and the change amount of a platform focal plane, and specifically comprises the following steps: arranging the AF mechanism below an exposure lens, moving a suction disc camera on the platform to be directly below the exposure lens, determining the optimal focal plane position Z of the platform through the suction disc camera m ; determining the relationship between the movement amount of the AF mechanism and the change amount of the platform focal plane, obtaining the relationship model between the focusing position of the AF mechanism and the change amount of the platform focal plane, thereby ensuring the accuracy of the focal plane compensation of the AF mechanism, eliminating the different influences of machining errors and movement errors and movement amounts on the focal plane, and preventing the phenomenon that the difference between the theoretical compensation surface and the actual compensation surface is different.

A device for measuring caustic parameters of a laser beam includes a beam splitter for splitting the laser beam into at least three spatially separated partial beams, and a detection unit for detecting images of the partial beams. A beam path from an input of the device to the beam splitter defines a beam axis for the laser beam, along which the laser beam propagates until entering the beam splitter. The beam splitter includes an optical lens, and a partially reflective surface configured to split the laser beam into the at least three partial beams by partial reflection within the optical lens. The optical lens is positioned off-axis such that an optical axis of the optical lens extends off-axis to the beam axis, and / or the optical lens is tilted such that the optical axis of the optical lens forms an angle with the beam axis that deviates from 0°.

The application discloses a center deviation detection method of an infrared optical lens, and the device comprises a rotary encoder and a servo motor for driving the rotary encoder to work, wherein the rotary encoder comprises a first rotary encoder and a second rotary encoder; the device comprises a base, an inner frame and an outer frame, the inner frame is provided with a support, a laser and a beam splitter prism are arranged in the support, and a two-dimensional PSD is further arranged on the support. The device has the advantages of simple structure, intuitive test method, symmetry performance for judging the center deviation value, simple structure, convenient debugging and maintenance, and reduced detection cost.