According to one embodiment, a processing device includes an acquisition part, and a processor. The acquisition part and the processor are configured to perform a first operation. The acquisition part is configured to acquire first image data, second image data, and third image data in the first operation. The first image data includes data related to a first object member image of an object member transmitting a first light. The second image data includes data related to a second object member image of the object member transmitting a second light. The third image data includes data related to a third object member image of the object member transmitting a third light. The processor is configured to derive first derived data based on the first, second, and third image data in the first operation.

A method for assessing the quality of a multi-channel micro- and/or subwavelength-optical projection unit is disclosed. The method comprises the following steps: At least a predefined portion of the optical projection unit is illuminated so that an image is generated by at least two channels of the predefined portion of the multi-channel optical projection unit. At least one characteristic quantity is determined based on the analysis of the image, wherein a value of the characteristic quantity is associated with a characteristic feature of the projection unit, a defect of the projection unit and/or a defect class of the projection unit. The quality of the projection unit is assessed based on the at least one characteristic quantity. Moreover, a test system for assessing the quality of a multi-channel micro- and/or subwavelength-optical projection unit and a computer program are disclosed.

A method for quality control of sealed contact lens packages may comprise disposing a package of a sealed contact lens in a light box, causing the package to be illuminated in the light box by a light source, capturing image data of the illuminated package in the light box, analyzing, based on one or more quality control models, the image data of the illuminated package in the light box, and causing, based on the analyzing, output of a quality control metric indicative of at least an accept or reject condition of the package.

Provided are systems and methods for measurement of optical vignetting, which can include causing a selective emitter array to emit at least one beam of light through an off-optical axis field position of a lens assembly, receiving, at a photo sensor array, an off-axis spot based at least in part on the emitted at least one beam of light, determining a size of the off-axis spot, and determining an off-axis F-Number of the lens assembly associated with the off-optical axis field position based on comparing the determined size of the off-axis spot with a size of an on-axis spot. Systems and computer program products are also provided.

A test pattern is displayed on a planar display surface 14. The power of a test lens 20 is determined by measuring the magnification of the test pattern as seen through the test lens with the test lens at two different lens distances dl.sup.1, dl.sup.2 from the display surface and calculating the power from the two magnification values and the difference in lens distance Δdl. Apparatus for carrying out the method includes a digital display screen 14 for displaying the test pattern and a digital camera 16 for capturing images of the test pattern through a test lens 20. The apparatus has a lens carriage 18 in which a test lens 20 is mounted to hold the test lens between the display screen and the camera. The lens carriage 18 is movable under control of an electronic control system 28 in a linear direction perpendicular to the display screen to vary the distance between the test lens and the display screen.

A method is provided for measuring optical characteristics of a glass sheet as the glass sheet is conveyed in a system for fabricating glass sheets including one or more processing stations and one or more conveyors for conveying the glass sheet during processing. The method comprises providing a background screen including contrasting elements arranged in a pre-defined pattern and a camera for acquiring an image of the background screen; acquiring data associated with a shape of a glass sheet travelling on a conveyor upstream from the background screen; removing the glass sheet from the conveyor; and positioning the glass sheet between the camera and the screen and thereafter acquiring an image of the background screen; re-positioning the glass sheet for continued movement of the glass sheet on the conveyor; and performing one or more processing operations using the acquired image data to analyze the optical characteristics of the glass sheet.

An amount obtained by multiplying a vector amount obtained by Fourier transform of a wavefront of a spectacle lens by a preset predetermined vector amount is adopted as an evaluation index of the spectacle lens, and the evaluation index is evaluated based on the evaluation index.

A method of categorizing a group of multimode optical fibers, the method including comparing an effective modal bandwidth of a first multimode optical fiber with a first threshold, the first multimode optical fiber being in a group of multimode optical fibers meeting a first OM-standard and the first threshold being an effective modal bandwidth of the first multimode optical fiber. The method further including categorizing the first multimode optical fiber as meeting OM functional requirements of a second OM-standard if the effective modal bandwidth of the first multimode optical fiber is equal to or above the first threshold, wherein the second OM-standard is higher than the first OM-standard.

A method of categorizing a group of multimode optical fibers, the method including comparing an effective modal bandwidth of a first multimode optical fiber with a first threshold, the first multimode optical fiber being in a group of multimode optical fibers meeting a first OM-standard and the first threshold being an effective modal bandwidth of the first multimode optical fiber. The method further including categorizing the first multimode optical fiber as meeting OM functional requirements of a second OM-standard if the effective modal bandwidth of the first multimode optical fiber is equal to or above the first threshold, wherein the second OM-standard is higher than the first OM-standard.

An optical probe receives an optical signal output from a test subject. The optical probe includes an optical waveguide composed of a core portion and a cladding portion disposed on an outer periphery of the core portion, wherein an incident surface of the optical waveguide, which receives the optical signal, is a convex spherical surface with a constant curvature radius.