An image processing device includes a memory; and a processor coupled to the memory, configured to determine a characteristic of glasses based on a first contour position and a second contour position, the first contour position indicating a contour position of a face that appears without the glasses and being detected from an obtained face image data of a user, and the second contour position indicating a contour position of the face that appears through the glasses and being detected from the obtained face image data of the user.

The local refractive power or the refractive power distribution of a spectacle lens is measured. A first image of a scene having a plurality of structure points and a left and/or a right spectacle lens of a frame front is captured with an image capturing device from a first capture position having an imaging beam path for structure points, which extends through the spectacle lens of the frame front. At least two further images of the scene are captured with the image capturing device from different capture positions, one of which can be identical with the first capture position, without the spectacle lenses of the spectacles or without the frame front containing the spectacle lenses having the structure points imaged in the first image, and the coordinates of the structure points in a coordinate system are calculated from the at least two further images of the scene by image analysis.

A system and method for measuring refractive index inhomogeneity between plates of a Lightguide Optical Element (LOE) uses an innovative measuring technique based on a shearing interferometric technique conventionally used to observe interference and test the collimation of light beams. Another feature of the current implementation is an innovative method for analyzing the characteristics of the generated interferogram to characterize discrepancies between adjacent plates in an LOE.

A method for assessing the similarity between a power profile of a manufactured optic device and a nominal power profile upon which the power profile of the manufactured optic device is based. The method comprises measuring the power profile of manufactured optic device, identifying a region of interest from the measured power profile of manufactured optic device, and applying an offset to the measured power profile to substantially minimize a statistical quantifier for quantifying the similarity between the nominal power profile and the offset measured power profile. The method further comprises comparing the offset and the statistical quantifier to predefined quality control metrics, determining whether the measured power profile meets the predefined quality control metrics based, at least in part on the comparison. In exemplary embodiments, the method may further comprise determining whether to associate the manufactured optic device with another nominal power profile, if the measured power profile does not meet the predefined quality control metrics.

An object is to provide a determination device that determines a state of a terminal end portion of a coated optical fiber at any location of the coated optical fiber. Reflection of test light varies in a reflection amount at each wavelength depending on a situation of the terminal end portion of the coated optical fiber. In other words, if the magnitude of the reflection amount at each wavelength can be known, the situation of the terminal end portion of the coated optical fiber can be estimated. The determination device according to the present invention is configured to make test light having a plurality of wavelengths incident from the optical fiber side and determine the test light based on a light intensity ratio of each reflected light beams reflected at the terminal end. In addition, reflection of test light varies in return loss at each wavelength depending on a situation of the terminal end portion of the coated optical fiber. If Rayleigh backscattered light can also be measured when measuring a reflection amount, the return loss can be known for each wavelength, and the situation of the terminal end portion of the coated optical fiber can be estimated from the result. The determination device according to the present invention is configured to make test light having a plurality of wavelengths incident from the optical fiber side and determine the test light based on a return loss at the terminal end.

A test device for a lens module in respect of visible light and in respect of infrared light includes a test fixture and a display able to show both types of light in images captured. The test fixture supports the lens module. The display is configured to display pictures of test cards captured by the lens module. The display includes a display panel and a backlight module located on a side of the display panel. The backlight module includes a first light source and a second light source, the first light source emits visible light, and the second light source emits infrared light.

A lensmeter system may include a mobile device having a camera. The camera may capture a first image of a pattern through a lens that is separate from the camera, while the lens is in contact with a pattern. The mobile device may determine the size of the lens based on the first image and known features of the pattern. The camera may capture a second image of the pattern, while the lens is at an intermediate location between the camera and the pattern. The second image may be transformed to an ideal coordinate system, and processed determine a distortion of the pattern attributable to the lens. The mobile device may measure characteristics of the lens based on the distortion. Characteristics of the lens may include a spherical power, a cylinder power, and/or an astigmatism angle.

A method, a device, and a computer program for determining at least one optical parameter of a spectacle lens, and a method for manufacturing the spectacle lens using the at least one optical parameter are disclosed. The optical parameter denotes a value for a property of the spectacle lens which is adjusted during manufacture of the spectacle lens to achieve an intended correction of ametropia of at least one eye of a user of the spectacle lens. The method includes: a) capturing at least one image of a user wearing the spectacle lens; and b) determining at least one optical parameter of the spectacle lens by image processing the at least one image, wherein the at least one image contains an eye portion including at least one eye and/or a face portion adjacent to at least one eye of a user of the spectacle lens.

A test fixture includes a base and an adjustable structure. The adjustable structure includes a limiting block, a locking block, and a fixing member. The limiting block is disposed on the base. The locking block is disposed on the base and abuts an edge of the limiting block to lock the limiting block in position. The fixing member is disposed on the limiting block to fix the limiting block on the base. When the locking block is moved from a first position to a second position, the locking block unlocks the limiting block, the fixing member is loosened, and the limiting block can rotate on the base. After the limiting block is rotated, the locking block is moved from the second position to the first position to lock the limiting block, and the fixing member is tightened to fix the limiting block on the base.

A system for measuring (200) a sample (2) by deflectometry comprising: a source (10) for generating a light beam in a source plane (105); an illumination module (19) for forming an illumination beam (9) comprising: a first converging optical element (18); a first selection optical element (16) with a first aperture (160); reflective matrix optical modulation means (30) to form a pattern (7), said first aperture (160) being configured to control the angles of said illumination beam (9) on said reflective matrix optical modulation means (30); a Schlieren lens (20) for obtaining an angle-intensity encoding of said pattern (7) on the sample (2); imaging (40) and detecting means (50) for detecting an image of said sample (2).