Abstract: A gas detection apparatus 1 includes a substrate 2; a light emitting element 3 provided on a main surface of the substrate for emitting light; a light receiving element 4 provided on the main surface of the substrate 2 for receiving the light; a light guide member 5 for guiding the light emitted by the light emitting element 3 to the light receiving element; a first joint member 6; and a second joint member 7. The first joint member joins the substrate and the light guide member, limits a displacement in a direction parallel and/or orthogonal to the main surface of the substrate. The second joint member joins the substrate and the light guide member, limits a displacement of the light guide member in a direction parallel to the main surface of the substrate and/or limits a displacement within a plane orthogonal to the main surface of the substrate.

Abstract: A portable optical spectroscopy device is disclosed for analyzing gas samples and/or for measurement of species concentration, number density, or column density. The device includes a measuring chamber with the gas sample to be analyzed, a light source with at least one laser diode for emitting a laser beam along a light path running through the measuring chamber at least in certain regions, means for modulating the wavelength of the light beam emitted by the light source, and an optical detector device having a first optical detector and at least one second optical detector. At least a part of the light emitted by the laser diode is detected after the light has passed through the measuring chamber m-times, and at least a part of the light emitted by the laser diode is detected with the at least one second optical detector after the light has passed through the measuring chamber n-times, where n>m applies.

Abstract: Systems and methods for determining the osmolarity of a sample are provided. Aspects of the subject methods include contacting a sensing surface of a surface plasmon resonance based sensor with a sample, and generating one or more data sets at at least two wavelengths over a time interval, wherein the data sets are used to determine the osmolarity of the sample. The subject methods find use in determining the osmolarity of a sample, such as a biological sample (e.g., a tear fluid), and in the diagnosis and/or monitoring of various diseases and disorders, such as, e.g., dry eye disease.

Abstract: Provided is a gas detection apparatus which suppresses occurrences of distortions of the optical path to reduce fluctuations of the gas detection sensitivity. A gas detection apparatus 1 includes a substrate 2; a light emitting element 3 disposed in a first region 21 in a main surface 20 of the substrate 2 for emitting light; a light receiving element 4 disposed in a second region 22 in the main surface 20 of the substrate 2 for receiving the light; a light guide member 5 for guiding the light emitted by the light emitting element 3 to the light receiving element 4; and a joint member 6 joining the substrate 2 and the light guide member 5. The joint member 6 serves as a rotation axis when the light guide member 5 is displaced relative to the substrate 2.

Abstract: Described herein are devices and methods for simultaneously expressing amyloid precursor protein and TonB protein. These devices and methods increase the production of these two proteins while also minimizing costs, making the proteins more widely accessible for medical research purposes, including the development of diagnostic tests for numerous diseases associated with elevated production of amyloid proteins. The amyloid precursor protein and TonB produced by the devices and methods described herein, as well as the devices themselves, can be used in experiments designed to model the interactions between metals and amyloids such as ?-amyloid that are characteristic of numerous diseases such as Alzheimer's. Finally, provided herein are diagnostic tests that can detect Alzheimer's disease in samples from patients; the tests are sensitive enough to identify diseases such as Alzheimer's even at pre-clinical stages, before the appearance of symptoms.

Abstract: An optical sensor device, includes an optical sensor that has a set of sensor elements, an optical filter that includes a plurality of regions, and one or more processors. A region, of the plurality of regions, includes a first set of optical channels comprising optical channels that are configured to pass light associated with respective subranges of a first wavelength range, a second set of optical channels comprising optical channels that are configured to pass light associated with respective subranges of a second wavelength range, and a third set of optical channels comprising optical channels that are configured to pass light associated with respective subranges of a third wavelength range. The one or more processors are configured to obtain, from the optical sensor, sensor data associated with a scene and determine image information associated with the scene based on the spectral information.

Abstract: An image inspection apparatus includes: an image capturing unit which captures images of an object; a transparent illumination unit which has a light-emitting surface which radiates light to the object and is configured to be able to control a light-emitting position on the light-emitting surface and a radiation direction of the light; and a control unit which is configured to control the image capturing unit and the illumination unit. The control unit causes the illumination unit to change the light-emitting position and the radiation direction, causes the image capturing unit to capture images of the object, identifies a light-emitting position and a radiation direction of the illumination unit when a measurement point of the surface of the object is illuminated from images of the object, and calculates a distance to the measurement point on the basis of the identified light-emitting position and the identified radiation direction.

Abstract: The present disclosure provides for an apparatus for measuring optical properties of liquid samples. The apparatus includes a sample chamber and a spectrometer optically coupled with the sample chamber. One or multiple sources of electromagnetic radiation are positioned relative to the sample chamber to direct electromagnetic radiation through the sample chamber to measure the color, haze, and/or clarity of the sample. Also provided is a method for measuring optical properties of liquid samples, including inserting a cuvette containing a liquid sample into the sample chamber of the apparatus, and directing electromagnetic radiation from the one or more sources and through the sample to measure the color, haze, and/or clarity of the sample. The apparatus and methods may be used to analyze various samples, such as petroleum-based fluids, including fuels and lubricants.

Abstract: A metrology system configured to measure overlay errors on a sample is disclosed. The metrology system measures overlay error on the sample in a first direction and/or a second direction simultaneously or sequentially. The metrology system comprises an illumination sub-system configured to illuminate a hatched overlay target on the sample with one or more illumination lobes. The metrology system further comprises an objective lens and a detector at an image plane configured to image the hatched overlay target. A controller is configured to direct illumination source to generate the illumination lobes, receive images of the hatched overlay target, and calculate the overlay errors between a first layer of the sample and a second layer of the sample.

Abstract: In one illustrative configuration, an air quality monitoring system may enable wide-scale deployment of multiple air quality monitors with high-confidence and actionable data is provided. Further, the air quality monitoring system may enable identifying a target emission from a plurality of potential sources at a site based on simulating plume models. The simulation of plume models may take into consideration various simulation parameters including wind speed and direction. Further, methods of determining a plume flux of a plume of emissions at a site, and methods of transmitting data from an air quality monitor are disclosed.

Abstract: A light detection and ranging (LIDAR) sensor system includes a dual-polarization optical antenna, a single-polarization optical antenna, a first receiver, and a second receiver. The dual-polarization optical antenna is configured to (i) emit a transmit beam with a first polarization orientation and (ii) and detect a return beam having a second polarization orientation. The single-polarization optical antenna is configured to detect the return beam having the second polarization orientation.

Abstract: Collection device for collecting elements on at least one bevel of a circular plate, comprising: a base comprising a collection groove intended to receive a collection liquid, a plate-carrier able to rotate the plate about itself and such that an outer periphery of the plate penetrates into the collection groove, wherein the collection device comprises means for visualising the interior of the collection groove, enabling at least one image to be acquired of the contact region between the collection liquid and a face of the plate.

Abstract: This invention relates to a method of and system for facilitating detection of a particular predetermined gas in a scene under observation. The gas in the scene is typically associated with a gas leak in equipment. To this end, the system comprises an infrared camera arrangement; a strobing illuminator device having a strobing frequency matched to a frame rate of the camera; and a processing arrangement. The processing arrangement is configured to store a prior frame obtained via the infrared camera arrangement; and compare a current frame with the stored prior frame and generate an output signal in response to said comparison. The system also comprises a display device configured to display an output image based at least on the output signal generated by the processing arrangement so as to facilitate detection of the particular predetermined gas, in use.

Abstract: In one illustrative configuration, an air quality monitoring system may enable wide-scale deployment of multiple air quality monitors with high-confidence and actionable data is provided. Further, the air quality monitoring system may enable identifying a target emission from a plurality of potential sources at a site based on simulating plume models. The simulation of plume models may take into consideration various simulation parameters including wind speed and direction. Further, methods of determining a plume flux of a plume of emissions at a site, and methods of transmitting data from an air quality monitor are disclosed.

Abstract: The present invention discloses a method of infrared spectrometric measurement of tunnel gas employing a gas measurement system including a gas collection unit, a gas analysis unit and a positioning indication unit for measuring the gas in the tunnel. The method performs sequential steps of installing the gas measurement system, starting the positioning indication unit for positioning one of the detection regions in the tunnel space, sampling the gas in the detection region through the gas collection unit, analyzing the gas by the gas analysis unit, generating a gas analysis result, and determining whether all of the detection regions are completed.

Abstract: Methods and systems for controlling tintable windows based on cloud detection.

Abstract: Provided is a liquid sensor that can more accurately detect the state of a liquid. The liquid sensor includes a light emitting element, an optical waveguide, a light receiving element, and a detection circuit. The light receiving element is configured to receive light that was emitted by the light emitting element and passed through the optical waveguide. The detection circuit is configured to detect output of the light receiving element. The optical waveguide includes a first pillar portion that extends straight and a second pillar portion that extends straight. The second pillar portion is provided at a position opposing the first pillar portion. A space for liquid is formed between the first pillar portion and the second pillar portion. The first pillar portion includes a first end surface that faces the light emitting element, and a second end surface that is tilted relative to the first end surface and reflects light toward the second pillar portion.

Abstract: A radiation source for obliquely launching a narrowband electromagnetic radiation into a cavity, comprises an emitter structure having a main radiation emission region for emitting the narrowband electromagnetic radiation, wherein the emitter structure is optically coupled to the cavity, and a layer element coupled to the main radiation emission region of the emitter structure, wherein the layer element comprises a radiation deflection structure configured for deflecting the radiation emission characteristic of the emitter structure with respect to the surface normal of the main radiation emission region of the emitter structure.

Abstract: Methods, devices and systems provide improved detection, sensing and identification of objects using modulated polarized beams. An example polarization sensitive device includes an illumination source, and a modulator coupled to the illumination source to produce output beams in which polarization states or polarization parameters of the output beams are modulated to produce a plurality of modulated polarized beams. The device further includes a polarization sensitive detector positioned to receive a reflected portion of modulated polarized beams after reflection from an object and to produce information that is indicative of modulation and polarization states of the received beams. The information can be used to enable a determination of a distance between the polarization sensitive device and the object, or a determination of a polarization-specific characteristic of the object.

Abstract: Apparatus for laser induced ablation spectroscopy (LIBS) is disclosed. An apparatus can have a computer, a pulsed laser and a lightguide fiber bundle that is subdivided into branches. One branch can convey a first portion of the light to a first optical spectrometer and a different branch can convey a second portion of the light to another optical spectrometer. The first spectrometer can be relatively wideband to analyze a relative wide spectral segment and the other spectrometer can be high dispersion to measure minor concentrations. The apparatus can have a plurality of spectrometers with distinct and/or complementary capabilities, and can include an inductively coupled plasma mass spectrometer and data and instructions in tangible media operable to obtain a synergistic composition analysis based on optical spectra and ion mass to charge ratio peaks from the mass spectrometer.