Systems, methods, and computer program products for measurement of surface properties using a mobile device are described, the surface properties including interfacial (surface) tension, contact angle (static, advancing, or receding), solid surface energy, and rolling or sliding angle on an inclined surface. The system has a support adapted to receive a mobile device with a camera and a processor. A structure is coupled to the support that is adapted to removably receive measurement components. The measurement components are configurable to place a droplet or a bubble within a field of view of the camera. Software on the mobile device is configured to operate the camera to take an image of the droplet or the bubble within the field of view of the camera, and to determine one or more physical properties of the droplet or the bubble based on an analysis of the image.

A device and method of compensating for the temperature dependence of a facet lens used for determining the topography of an eye. According to the invention, temperature sensors are present for determining the temperature of the facet lens. In addition, the temperature dependence of the beam angles of the beam bundles is stored in a control and evaluation unit, which, in addition to the temperature of the facet lens transmitted by the temperature sensors, are taken into account by the control and evaluation unit when evaluating the recordings of the image recording unit. The device and method are described in the context of facet lenses that are used to determine the topography of an eye. However, in principle, they are usable wherever an existing temperature dependence, in particular of optical components, should be compensated for.

A method and system for identifying a given geometrical feature of an optical component or semi-finished ophthalmic lens blank, where an optical component is made of an organic material that can emit light at an emission wavelength λ.sub.e when being lighten at an illumination wavelength λ.sub.i different from the emission wavelength λ.sub.e, a surface of the optical component is illuminated with an incident light beam including at least light at the illumination wavelength but devoid from light at the emission wavelength, light emitted at the emission wavelength by the illuminated surface is collected to build an image of the surface, and the surface image is processed to apply metrics to compare the image with reference data specific to the given geometrical feature.

A method and system for identifying a given geometrical feature of an optical component or semi-finished ophthalmic lens blank, where an optical component is made of an organic material that can emit light at an emission wavelength λ.sub.e when being lighten at an illumination wavelength λ.sub.i different from the emission wavelength λ.sub.e, a surface of the optical component is illuminated with an incident light beam including at least light at the illumination wavelength but devoid from light at the emission wavelength, light emitted at the emission wavelength by the illuminated surface is collected to build an image of the surface, and the surface image is processed to apply metrics to compare the image with reference data specific to the given geometrical feature.

Systems for determining motion characteristics of a sports object. In an embodiment, the system comprises a light grid structure and a processor. The light grid structure comprises a frame and light-source assemblies and photo-detector assemblies. Each of the light-source assemblies and photo-detector assemblies is mounted on the frame such that each light-source assembly is on an opposite side of the frame than a corresponding photo-detector assembly, and each light-source assembly emits a light beam which is detected by its corresponding photo-detector assembly. The processor receives data that is based on outputs of the photo-detector assemblies. The data indicates light beam(s) which have been interrupted. Based on the data, the processor determines motion characteristic(s) of an object which interrupted the light beam(s), including an angle of incidence.

Systems for determining motion characteristics of a sports object. In an embodiment, the system comprises a light grid structure and a processor. The light grid structure comprises a frame and light-source assemblies and photo-detector assemblies. Each of the light-source assemblies and photo-detector assemblies is mounted on the frame such that each light-source assembly is on an opposite side of the frame than a corresponding photo-detector assembly, and each light-source assembly emits a light beam which is detected by its corresponding photo-detector assembly. The processor receives data that is based on outputs of the photo-detector assemblies. The data indicates light beam(s) which have been interrupted. Based on the data, the processor determines motion characteristic(s) of an object which interrupted the light beam(s), including an angle of incidence.

Systems and methods for measuring a curvature radius of a sample. The methods comprise: emitting a light beam from a laser source in a direction towards a beam expander; expanding a size of the light beam emitted from the laser source to create a broad laser beam; reflecting the broad laser beam off of a curved surface of the sample; creating a plurality of non-parallel laser beams by passing the reflected broad laser beam through a grating mask or a biprism; using the plurality of non-parallel laser beams to create an interference pattern at a camera image sensor; capturing a first image by the camera image sensor; and processing the first image by an image processing device to determine the curvature radius of the sample.

Systems and methods for measuring a curvature radius of a sample. The methods comprise: emitting a light beam from a laser source in a direction towards a beam expander; expanding a size of the light beam emitted from the laser source to create a broad laser beam; reflecting the broad laser beam off of a curved surface of the sample; creating a plurality of non-parallel laser beams by passing the reflected broad laser beam through a grating mask or a biprism; using the plurality of non-parallel laser beams to create an interference pattern at a camera image sensor; capturing a first image by the camera image sensor; and processing the first image by an image processing device to determine the curvature radius of the sample.

A titration module includes a base, at least one titration unit, a contact angle measuring module, and a computing unit. The at least one titration unit is disposed above the base for titrating a globule onto a device under test. The contact angle measurement module is disposed above the base for measuring a first height and a first radius of the globule. The computing unit can calculate a second radius according to the first height and the first radius, and can calculate a contact angle of the globule according to the first height and the second radius. Also disclosed are a test apparatus, and a method for measuring titration contact angles.

An end mill inspection device, which inspects an end mill having a blade part formed in a curved convex shape or an arc shape, includes: an imaging data acquisition unit that acquires imaging data obtained by capturing an image of a blade part of the end mill by an imaging unit; a contour extraction unit that extracts the contour of the blade part on the basis of the imaging data acquired by the imaging data acquisition unit; and a curvature radius calculation unit that calculates a curvature radius of the contour on the basis of the contour of the blade part extracted by the contour extraction unit.