61results 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 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.

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).

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.

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.

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.

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.

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 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.

To provide apparatuses, systems and methods for determining one or more parameters of a lens.SOLUTION: A method of determining one or more optical parameters of a lens is provided, comprising processing at least one depth map including depth information captured via the lens, and determining the one or more parameters of the lens based at least on the depth map.SELECTED DRAWING: Figure 8

A fiber rotator system includes a clamp assembly and a fiber rotator assembly for aligning multiple optical fibers. The clamp assembly has a base with fiber channels, fiber clamps, and a guide assembly. The fiber rotator assembly includes a linear actuator and wheel clamps, each aligning with a fiber base channel. Each fiber clamp includes a jaw, connecting rod, spring, and handle, while each wheel clamp includes a linear actuator contactor, wheel jaw, fiber channel rod, and wheel guide. A fiber detection and alignment system analyzes fiber end faces and provides alignment data to a fiber rotator controller. In operation, each wheel clamp contacts and rotates with the linear actuator. The fiber rotator controller selectively engages and disengages the fiber clamps and wheel clamps to iteratively rotate and secure fibers until all fibers are aligned. The system scalably automates alignment of multiple polarization maintaining (PM) fibers with high precision.

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 invention relates to a method for determining an assembly scheme for an optical element, such as an optical lens, for equipping an optical module, said module having a stack axis (z) and a reference plane (x, y) perpendicular to the stack axis, and comprising a combination of N types of optical lenses (Lk), k = [1,... N], provided with two interfaces f and mounted in a lens barrel (10), the method is intended to determine, for a subset of the n lenses, a rotation angle [theta] k with respect to a reference angular position [theta] 0, which corresponds to the closest spacing of the projections of the 2n vertices (COk, f) of said subset on the reference plane (x, y).

A method of calibrating intrinsic parameters associated with a camera includes positioning the camera to receive collimated light from a rotatable collimator, wherein the collimated light is provided to the camera via a target having a central target aperture and a plurality of peripheral target apertures located at a periphery of the target. The method further includes rotating the collimator along a first axis extending through an entrance pupil location of the camera and recording spot locations associated with the collimated light provided through one or more target apertures of the target at each first axis interval, and determining a distortion profile associated with the camera based on the recorded spot locations measured at a plurality of first axis intervals.

An object of the present invention is to provide an information processing apparatus, an information processing method, and a program which make it possible to appropriately identify a lens from an image showing a cross section of the lens.In the present invention, a processor detects an existing region of a lens in a target image showing a cross section of a part including the lens in a target device including the lens, and the processor identifies the lens of the target device existing in the existing region based on a feature amount of the existing region by an identification model constructed by machine learning using a plurality of learning images showing a cross section of the lens.

A method for measuring the position of a target surface (203, 1203) which has position-determining sections (101A, 101B, 101C, 101D; 1101A, 1101B) provided thereon, wherein a diffuse reflectance of the target surface is 0.1% or less and a diffuse reflectance of the position-determining sections (101A, 101B, 101C, 101D; 1101A, 1101B) is 5% or more, and wherein the target surface (203; 1203) is a surface of an element (200; 1200) which is provided with a first plane (201; 1201) and a second plane which forms an angle between 15° and 75° to the first plane (201; 1201), wherein the target surface (203; 1203) is the second plane is and the element (200; 1200) is provided with at least three sections for determining position (101A, 101B, 101C, 101D; 1101A, 1101B) at the second level, wherein the sections for determining position (101A, 101B, 101C, 101D;1101 A, 1101B) are arranged such that a distance between the position detection sections (101A, 101B, 101C, 101D; 1101A, 1101B) is sufficiently large to locate the second plane, the method comprising the steps: ; Illuminate (S2010) the target surface (203; 1203) with parallel light perpendicular to the first plane (201; 1201); Determining (S2020) the positions of boundary lines of the majority of sections for position determination (101A, 101B, 101C, 101D; 1101A, 1101B) starting from a survey of the target area (203; 1203), and Determine (S2030) the position of the target area (203; 1203) from the positions of the boundary lines of the majority of sections for determining the position (101A, 101B, 101C, 101D; 1101A, 1101B).

A method of measuring a surface of an optical element and an interferometric measuring device for measuring a surface or profile of the optical element. The optical element having a first surface and a second surface opposite the first surface. The method includes defining at least a first measurement point, a second measurement point and a third measurement point on a measurement surface of the optical element being one of the first surface and the second surface, measuring a first position of the first measurement point by directing a measurement beam from a measurement head onto the first measurement point and by detecting a measurement beam portion reflected at the first measurement point, subsequently measuring at least a second position of the second measurement point and a third position of the third measurement point by directing the measurement beam onto the second measurement point and onto the third measurement point and by detecting a measurement beam portion reflected at the second measurement point and the third measurement point, respectively, and determining at least one of a decenter and a tilt of the measurement surface relative to a reference axis on the basis of at least the first position, the second position and the third position.

Measurement device for determining one or more parameters being indicative of the relative position of a first surface of an optical element with respect to a second surface of the optical element, the first surface and the second surface being on substantially opposing sides of the optical element, wherein at least one of the first surface and second surface is a non-planar surface, the measurement device comprising: − a supporting device comprising a support arranged for stably supporting the optical element in the measurement device in a first orientation stationary relative to the measurement device; − a measurement unit arranged for mapping, in a measurement coordinate system, main geometry data of the first surface representative of the three dimensional surface shape of the first surface, as well as reference geometry data of the second surface representative of at least three second surface reference points of the second surface in the measurement coordinate system; − a processing unit that is configured to determine the one or more parameters on the basis of provided main geometry data of the second surface representative of the three dimensional surface shape of the second surface and the main geometry data of the first surface and the reference geometry data of the second surface.

This method for retrieving at least one optical parameter of an ophthalmic lens comprises: obtaining (10) an image of a first and second patterns by using an image capture device located at a first position; from that image, obtaining (12) a first set of data from at least a part of the first pattern that is seen through the lens by the image capture device and obtaining (14) a second set of data from at least a part of the second pattern that is seen directly i.e. outside the lens by the image capture device; retrieving (16) the at least one optical parameter by using the first and second sets of data and taking account of relative positions of the image capture device, the lens and the first and second patterns.

The application discloses a light collimating device for multi-directional light axis detection and alignment. The light collimating device divides a laser beam into an angle of 90 degrees through a light splitting prism, one light beam returns along the original path after passing through a parallel flat glass, and a part of the laser beam returns along the original path, and the light splitting prism divides the laser beam into an angle of 90 degrees again, so that the detection of the light axes in three directions is realized. The patent solves the problem of the detection and alignment of the light axes in three directions, and can also be used for the detection and alignment of any two directions, so that real-time high-precision monitoring of a measured plane is realized.