Abstract: A computer implemented methods for estimating at least one quality function of a given layered coating on a transparent substrate allows to predict at least one non in-process measured quality function of a given layered coating on a transparent substrate from an in-process measured quality function which can be acquired on the coated substrate as deposited at any location, preferably at the end of a coating process. The method allows to get rid of in-process real-time continuous measurements of quality functions of the coated transparent substrate and real-time monitoring of coating process parameters.

Abstract: A spectroscopic assembly may include a spectrometer. The spectrometer may include an illumination source to generate a light to illuminate a sample. The spectrometer may include a sensor to obtain a spectroscopic measurement based on light, reflected by the sample, from the light illuminating the sample. The spectroscopic assembly may include a light pipe to transfer the light reflected from the sample. The light pipe may include a first opening to receive the spectrometer. The light pipe may include a second opening to receive the sample, such that the sample is enclosed by the light pipe and a base surface when the sample is received at the second opening. The light pipe may be associated with aligning the illumination source and the sensor with the sample.

Abstract: A filter and a miniature spectrum measuring device are provided. The filter includes a plurality of film structures. Each of the film structures includes an H-type structural film, an L-type structural film, and a cavity film disposed between the H-type structural film and the L-type structural film.

Abstract: In some examples, fiber optic cable location may include transmitting a coherent laser pulse into a device under test (DUT). Based on an analysis of reflected light resulting from the transmitted coherent laser pulse, changes in intensity of the reflected light caused by a plurality of signals directed towards the DUT may be determined. Further, based on the changes in intensity of the reflected light, a location of the DUT may be determined.

Abstract: The invention provides a method for calibration of an optical measurement system, which may be a heterodyne interferometer system, wherein a first optical axis and a second optical axis have a different optical path length, the method comprises: ?measuring a first measurement value along the first optical axis using a first measurement beam, ?measuring a second measurement value along the second optical axis using a second measurement beam, ?changing a wavelength of the first measurement beam and the second measurement beam, ?measuring a further first measurement value along the first optical axis using the first measurement beam with changed wavelength, measuring a further second measurement value along the second optical axis using the second measurement beam with changed wavelength, ?determining a cyclic error of the optical measurement system on the basis of the measured values, and ?storing a corrective value based on the cyclic error.

Abstract: To reduce costs by adopting a direct modulation system in which a semiconductor laser is directly modulated. An optical fiber sensor includes a light source configured to generate an optical pulse as probe light by a direct modulation system, an optical bandpass filter configured to extract anti-Stokes light that is a component on an anti-Stokes side of Brillouin scattered light from backscattered light generated by the probe light in an optical fiber to be measured, an interference signal acquisition unit configured to generate an interference signal by self-delayed heterodyne interference from the anti-Stokes light extracted at the optical bandpass filter and input to the interference signal acquisition unit and a Brillouin frequency shift acquisition unit configured to acquire a Brillouin frequency shift amount from the interference signal.

Abstract: A mobile robot of the present disclosure includes: a traveling unit configured to move a main body; a lidar sensor configured to acquire terrain information outside the main body; a camera sensor configured to acquire an image outside the main body; and a controller configured to fuse the image and a detection signal of the lidar sensor to select a front edge for the next movement and set a target location of the next movement at the front edge to perform mapping travelling. Therefore, in a situation where there is no map, the mobile robot can provide an accurate map with a minimum speed change when travelling while drawing the map.

Abstract: Systems, methods, and apparatus for differential phase contrast microscopy by transobjective differential epi-detection of forward scattered light are provided. In some embodiments, a microscope objective comprises: a housing with mounting threads at a second end; optical components defining an optical axis, comprising: an objective lens mounted at a first end, configured to collect light from a sample placed in a field of view, the plurality of optical components create a pupil plane at a first distance along the optical axis at which rays having the same angle of incidence on the objective lens converge at the same radial distance from the optical axis; a photodetector within the housing offset from the optical axis at a second distance along the optical axis; and another photodetector within the housing at second distance along the optical axis and offset from the optical axis in the opposite direction from the first photodetector.

Abstract: An apparatus is provided for measuring far-field luminous intensity and color characteristics of a light source that includes a lamp test location for receiving a lamp for testing and a mirror positioned in a fixed light receiving position relative to the lamp test location and positioned in a fixed light transmitting position for reflecting a light beam from the lamp at a predetermined angle relative to the light receiving position. A measurement screen is positioned in a location relative to the mirror to receive the parabolically-condensed light image reflected from the mirror at the predetermined angle and a light detector is positioned to capture a light image reflected from the measurement screen. The light detector is configured to convert the reflected light image on the measurement screen to a digital signal and output the digital signal.

Abstract: An analyte detection apparatus includes a radiation source for irradiating a sample and a receiver to receive an optical Raman spectrum of radiation transmitted back from the sample, the spectrum including one or more parts of significance to an analyte to be detected and one or more parts not of significance to an analyte to be detected. The receiver includes different types of analysis device each arranged to receive a selected part of the spectrum. The different types of analysis device include at least one analysis device having high resolution and/or high signal to noise ratio for detecting a part of the spectrum of significance to the analyte to be detected and at least one second type of analysis device which provides lower resolution and/or lower signal-to-noise ratio, for detecting a part of the spectrum not of significance to the analyte to be detected.

Abstract: Embodiments of the present invention relate to determining temperature, pressure, strain, or other changes of an optical fibre (250) having Fiber Bragg Grating (FBG) patterns provided in at least one portion (Portion 1) of said optical fibre (250), said optical fibre (250) being connected between a first detector arrangement (210) and a second detector arrangement (220).

Abstract: This invention provides a UV spectroscopy apparatus and method for controlled drug waste diversion detection. The spectroscopy apparatus employs sample cells which have optimized optical path length such that the measured maximum absorbance of the drug is less than the detection limit of the system. Hence the full unsaturated absorption spectrum of the drug is revealed in the UV wavelength region from 230 nm (or even down to 195 nm) to 400 nm. This full spectrum analysis improves the specificity for drug identification and the accuracy for drug concentration verification. The spectral library of the apparatus comprises the spectra of common controlled drugs, excipients, as well as typical diluents, which enables the identification of controlled drugs from different manufacturers and/or diluted with different types of diluents.

Abstract: A multi-optical axis sensor according to an embodiment of the present invention comprises: a light-transmitting unit comprising a plurality of light-transmitting elements; a light-receiving unit comprising a plurality of light-receiving elements which are arranged to respectively face the light-transmitting elements and respectively receive light from the light-transmitting elements; and an indicator light indicating a light incidence state or a light blockage state of the light-receiving unit, wherein, before a muting state that invalidates the detection function of the multi-optical axis sensor is detected, the light-transmitting unit or the light-receiving unit may operate the indicator light in a light incidence/blockage mode indicating the light incidence state or the light blockage state, and when the muting state is detected, the light-transmitting unit or the light-receiving unit may switch the operation mode of the indicator light from the light incidence/blockage mode to the muting mode indicating t

Abstract: Various examples include an apparatus to characterize substrate and film thicknesses of the substrate and films formed thereon. The apparatus uses one or more wavelengths of light from a light source (e.g., a swept laser) to interrogate the substrate. The light is directed substantially orthogonally to an upper surface of the substrate. A polarizer and an analyzer element are coupled between the light source and the substrate. Therefore, the polarizer and the analyzer are both located in the beam propagation path from the light source to the substrate. An optical detector is arranged substantially orthogonally to the upper surface of the substrate. The optical detector receives light returned back from the substrate. The apparatus is capable of determining the thickness of the substrate and one or more films contained thereon, regardless of substrates having optical anisotropies, such as chiral characteristics or stress-induced films. Other apparatuses and methods are also disclosed.

Abstract: The present invention relates to the use of a Raman spectral signature of nitrate, as a biomarker for an early, real-time diagnosis of nitrogen status in growing plants in a non-invasive or non-destructive way in order to detect nitrogen deficiency before the onset of any visible symptoms. The early, real-time diagnosis of nitrogen deficiency in plants makes it possible to correct nitrogen deficiency for the avoidance of negative effects on the yield and biomass of growing plants or leafy vegetables.

Abstract: A material evaluating device for an agricultural work machine comprising: a light source for illuminating one or more constituent materials to be examined; a spectrometer for providing a spectral signal related to the wavelength-specific intensity of light reflected by the constituent materials; and an evaluation device configured to determine the content of one or more constituent materials using the spectral signal of the spectrometer and a calibration data, wherein a property signal relating to a property of the one or more constituent materials is supplied to the evaluation device and the evaluation device is configured, using the property signal, to determine the content of the one or more constituent materials.

Abstract: Light mapping devices and systems for use in indoor or vertical farming are disclosed herein. In particular, a light detection device is provided that includes a plurality of light sensors configured for detecting light emitted from one or more light sources at distinct positions across a grow plane. The light detection device will also include a microcontroller and one or more signal routing circuit boards, or junctions, for making electrical connections between the light sensors and the microcontroller in a multiplex architecture to enable the microcontroller to cycle through and read the Lux values from each of the light sensors with sub-second frequency and in real-time. The light detection device may also be part of a light mapping system that converts the Lux values to PPFD and generates a heatmap of PPFD intensity at distinct locations across the grow plane.

Abstract: A photoacoustic detecting device comprises a housing which houses: a lighting module, a photoacoustic cell, comprising an surface contact intended to be placed in contact with the medium to analyse, a photoacoustic cavity extending from the surface contact to a top of the photoacoustic cell, at least one window closing the top of the photoacoustic cell or the contact surface of the photoacoustic cell, at least one subwavelength pattern located on a surface of said window, said subwavelength pattern being configured to focus the light beam on an surface of interest of the medium to analyse, a sensor, linked to the cavity, the sensor being configured to detect a generated signal, said generated signal being generated in the photoacoustic cavity by a photothermic effect in the medium, and wherein the photoacoustic cell, the window and the subwavelength pattern are formed on a single silicon wafer.

Abstract: Systems and methods for calibrating non-spatial measurements of a device under test (DUT) for misalignment between the DUT and a non-spatial measurement device are disclosed herein. A system for generating a misalignment calibration database can include, for example, a non-spatial measurement device and a high-precision translation stage. The system can generate a misalignment calibration database by taking measurements of a DUT at multiple misalignment locations. A system for measuring a DUT can include, for example, a spatial measurement device, a non-spatial measurement device, a translation stage, and/or a carrier tray. The system can capture measurements of the DUT at a first position and calibrate the measurements for misalignment using calibration data corresponding to the first position. For example, the system can retrieve calibration data from a calibration misalignment system that was taken at the same and/or different locations proximate the position of the DUT.

Abstract: An optical sensor. The optical sensor comprises a substrate, a Fabry-Perot interferometer, and first and second photodetectors. The Fabry-Perot interferometer comprises a first mirror and a second mirror, and is mounted on the substrate such that light is transmitted through the interferometer to the substrate. The first and second photodetectors are configured to detect light transmitted through the etalon and the substrate. The first photodetector is sensitive to a first wavelength range, and the second photodetector is sensitive to a second wavelength range, and wherein the first and second wavelength ranges each correspond to a different mode of the interferometer.