In a method for optically checking a large-area three-dimensional object an illumination surface of parallel light beams is generated using a light source, a large-area three-dimensional object is partly or completely illuminated by the illumination surface, and a change of the parallel light beams of the illumination surface through the object is detected, wherein a projection surface is arranged on an object face opposite the light source, and the object shadow cast on the projection surface by the illumination surface is detected using an optical detection device. The strip-shaped light curtain is produced with a Fresnel lens. The shadow is detected using an optical lens system or a CCD camera. The dimensions of the object parallel to the projection surface are ascertained and compared with specified reference values. The projection surface is an opaque panel made of a translucent material or a surface-treated glass pane.

A method having the steps of measuring a geometry of a toothing using an optical measuring system, wherein a numerical aperture of the optical measuring system is adjustable and the numerical aperture of the optical measuring system is adapted depending on at least one geometric parameter of the toothing to be measured and/or is enlarged or reduced.

Provided is a system for detection and analysis of a fibrous root system architecture of a plant, including a plant pot having at least one slit area extending through a cross section in an axial direction, at least one laser measuring unit, and a data analyzing unit, where each laser measuring unit has a laser transmitter and a receiver disposed corresponding to the slit area in such a manner that a laser beam emitted from the laser transmitter to the receiver goes across the cross section of the plant pot; measurement on all roots in the slit area is realized by a rotating stage, and the laser measuring unit swinging horizontally around the laser transmitter within a predetermined angle range; and the data analyzing unit is configured to perform statistical analysis on the roots of a plant to be measured according to laser measuring results.

A device for measuring a horological component comprising a measurement cell, at least two optical systems and a driver unit. The measurement cell comprises a measurement channel filled with a liquid and flat and parallel faces. Each optical system comprises a light emitter suitable for emitting a light in a predefined wavelength so as to illuminate a horological component that is present and being displaced in the measurement channel in the measurement zone and an optical sensor associated with said light emitter to receive at least a part of the light emitted by said light emitter. The optical systems operate in different respective wavelengths. The driver unit drives the optical systems and processes the digital data obtained from the optical systems. It is configured to implement calculations of at least one measurement of a horological component.

A method generating a more accurate 3D model for at least two gemstones using external surface of the gemstones; storing, in memory, the more accurate 3D model of the first gemstone and the second gemstone; comparing the more accurate 3D model of the first gemstone and the more accurate 3D model of the second gemstone from the stored memory; calculating, based on the comparison, a matching score for the more accurate 3D model of the first gemstone and the more accurate 3D model of the second gemstone, the matching score being informative of a match between the first gemstone and the second gemstone; and identifying the first gemstone and the second gemstone as being the same gemstone when the matching score meets a predefined matching criterion.

A system for inspecting a component includes a fixture for holding the component, a light source disposed on one side of the component, and an optical detector disposed on the other side of the component. The detector images a portion of the outer edges of the component. A translation stage is operative to move the light source and detector in unison along the length of the component. The component is rotated through a predetermined angle about its axis.

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.

A detection apparatus according to an embodiment of the present technology includes: an imaging unit; an illumination unit; a polarization control unit; and a generation unit. The imaging unit generates image data on the basis of incident light. The illumination unit illuminates a subject with linearly polarized light. The polarization control unit controls a polarization state of light to be detected, the light to be detected travelling toward the imaging unit. The generation unit generates information regarding a degree of linear polarization of the light to be detected, on the basis of image data regarding the light to be detected, the polarization state of the light to be detected having been controlled, the image data regarding the light to be detected being generated by the imaging unit.

An optical measuring and/or presetting method for a combined measuring and/or presetting of a set of profile machining tools comprises a plurality of individual profile machining tools is proposed, wherein the individual profile machining tools of the set of profile machining tools are configured for a successive machining of side edges of stone slabs, with at least one tool presetting and/or tool measuring apparatus, by means of which in at least one first tool measuring step an at least partly and/or at least section-wise concave-curved work contour, in particular milling contour or polishing contour, of a first profile machining tool of the set of profile machining tools is optically captured in an at least semi-automated manner, wherein in a first tool presetting step profile coordinates are assigned to the work contour of the first profile machining tool captured in the first tool measuring step, said profile coordinates being stored in a memory unit of the tool presetting and/or tool measuring apparatus

Convenience is improved by enabling an imaging section to capture an image of a measurement element without adjustment of a rotation angle of a measurement object performed by a user. A control unit identifies a reference rotation angle during measurement, and calculates a measurement angle to measure a measurement element based on a relative rotation angle with respect to the reference rotation angle stored in advance. The control unit controls a rotation unit such that a rotation angle of the rotation unit becomes the measurement angle. The control unit executes a process of measuring a dimension of the measurement element based on a measurement object image captured by an imaging section when the rotation angle of the rotation unit becomes the measurement angle.