Abstract:
Disclosed are devices and methods for detecting a counterfeit or adulterated products and/or packaging. The device (20) includes a plurality of light sources (28) configured to emit light at a plurality of different wavelengths onto an object, at least two image acquisition devices (34a, 34b) adapted to acquire first and second image data, and first and second imaging displays (36A, 36B) configured to display the first and the second image data, respectively.
Abstract:
A colorimeter for measuring a concentration of a chemical in a turbid sample can include a colorimeter body having a sample chamber, a sample vessel to receive the turbid sample, where the sample vessel is disposed in the sample chamber, and a light source to emit an incident light beam. The colorimeter can further include a first photodetector configured to send a first output signal corresponding to the concentration of the chemical in the turbid sample and a first optical component arranged to direct the incident light beam through the turbid sample and to the first photodetector, where the first optical component increases a total Beer-Lambert optical path length of the incident light beam. The colorimeter can further include a second photodetector configured to send a second output signal corresponding to intensity of scattered light and a second optical component arranged to direct scattered light to the second photodetector.
Abstract:
Systems and methods for generating 3D representations of shape and color texture of a test surface are described. In one aspect, surface topography interferometers are equipped with a multi-element detector and an illumination system to produce a true-color image of the measured object surface. Color information can be presented as a true-color two-dimensional image or combined with topography information to form a three-dimensional representation of the shape and color texture of the object, effectively creating for a human observer the impression of looking at the actual part.
Abstract:
The invention relates to a method for scanning a coloured surface (2) of a tile and a device which actuates the method. The device (1 ) for scanning a coloured surface (2) of a tile (3) comprises a matrix of photodetectors (4) comprising a plurality of rows of photodetectors (5) which are parallel and placed side by side, the matrix of photodetectors (4) does not comprise any colour filter above the photodetectors (4) and the rows of photodetectors (5) are near each other and spaced by a distance equal to at least one pixel; the matrix of photodetectors (4) is arranged such as to acquire, in synchrony with a temporal scanning interval, an image of a surface band (6) of a coloured surface (2) to be scanned of a tile (3). The device also comprises: a plurality of lamps (7) each having a light emission spectrum different from a light emission spectrum of another lamp of the plurality of lamps (7); the lamps of the plurality of lamps (7) being arranged such as to illuminate the surface band (6) of the coloured surface (2) to be scanned of the tile (3); the lamps of the plurality of lamps (7) being commandable to switch on at least one at a time at each temporal scanning interval; conveyor means (8) provided for restingly receive and transport the tile (3) to be scanned and for determining a relative movement between the tile (3), on a side, and the matrix of photodetectors (4) and the plurality of lamps (7), on the other side, in a movement direction which is perpendicular to the plurality of rows of photodetectors (5) such that for each surface band (6) of the coloured surface (2) to be scanned of the tile (3) a predetermined number of images is acquired.
Abstract:
A device (100) for measuring a complexly formed object (105) comprises a plurality of light-section measuring devices (110), a rotator for causing a rotation (120) between the complexly formed object (105) and the plurality of light-section measuring devices (110) around a rotation axis (101), wherein each of the plurality of light-section measuring devices (110) is configured to generate a respective fan beam (130) in a respective fan plane, wherein the fan planes are arranged such that the rotation axis (101) extends within each of the fan planes, wherein the plurality of light-section measuring devices (110) is configured such that the fan beams (130) are directed to the complexly formed object (105) from different fan directions (135) which, when projected into a common plane (115) through which the rotation axis extends, by rotation around the rotation axis, differ from each other.
Abstract:
A method and apparatus for dating a dating a body sample, such as blood, includes taking at least one spectroscopic measurement (37) of the sample at least two predetermined positions in the spectrum having spectral characteristics corresponding to at least two predetermined substances present in the sample that have a time varying relationship with each other. A measured relative concentration of each of the predetermined substances is then determined (41) from the measurement, and the measured relative concentrations of the two predetermined substances is compared (43) with a known variation of the relative concentrations of the two predetermined substances over time. A good fit of the measured relative concentrations to the known variation of the relative concentrations is then determined, so as to provide an indication of the age of the sample (44). Alternatively, instead of measuring the relative concentrations of each of the predetermined substances, the rate of change of the relative concentrations is determined.
Abstract:
A color analysis system (100) includes a plurality of light sources (110) configured to illuminate a test patch (112). A sensor (116) is configured to receive light (118) from the plurality of light sources reflected from the test patch. A controller (120) is configured to determine the color of the test patch in response to light received by the sensor reflected from the first light source, and adjust the color determination in response to light received by the sensor reflected from the first and second light sources.
Abstract:
A method of colour assessment of a sample (10) with respect to a reference illuminant, includes illuminating the sample (10) with a light source (12) that comprises a fluorescent lamp (18) and a plurality of light-emitting diodes (24). The spectrum of the LEDs (24) supplements the spectrum of the fluorescent lamp (18) to reduce deviations between the combined spectrum of the light source (12) and a target spectrum. The target spectrum may be that of the reference illuminant or it may be adjusted to make allowance for known properties of a colour assessment cabinet (2) or an observing instrument (16). The LEDs (24) may be arranged so that their light passes through the bulb of the fluorescent lamp (18), which thereby acts as a diffuser. Alternatively, the LEDs (24) and the fluorescent lamp (18) may be located in a housing (31) from which their light can only reach the sample (10) after being mixed by reflection from multiple facets (34).
Abstract:
A spectrophotometer includes a plurality of LEDs arranged in a circular array, each having a calibrated power input determined by the use of pulse width modulation and each having a unique wavelength band determined by the utilization of a unique fluorescent phosphor coating or lens. At least one of the LEDs comprising a phosphor-free high energy UV LED. Light reflected to the spectrophotometer is divided into predetermined wavelength ranges through the utilization of a linear variable filter and photo detectors wherein the analog signal from a photo detector is converted to a digital value through the use of auto-ranging gain technique.