Described are systems and techniques directed to optical inspection of moving products (wafers, substrates, films, patterns) that are being transported to or from processing chambers in device manufacturing systems. Implementations include a system that has a first source of light to direct a first light to a first location on a surface of a product. The first light generates, at the first location, a first reflected light. The system further includes a first optical sensor to generate a first data representative of a first reflected light, and a processing device, in communication with the first optical sensor to determine, using the first data, a property of the product.

A system for sensing analyte in at least partly translucent material, including one or more radiation sources configured for successively providing radiation at a first and a second wavelength, respectively, two or more waveguides for simultaneously transmitting the radiation at each wavelength provided by the radiation source, a first waveguide being a reference waveguide and a second being a sensing waveguide; and measuring means for measuring a phase difference between the radiation waves from the reference waveguide and the measuring waveguide, resp. The present method can be used for measuring contaminants such as Fe, Sn, and/or Pb in oil related products, such as carburant or lubricant.

Among other things, this application describes systems and methods for detecting gas using a wide band light source, and at least two narrow band light sensors, wherein each sensor may be operable to detect light at a different range of wavelengths. Additionally, the gas detector device may comprise a color changing indicator operable to react with gas in the air to change color, wherein different gases may react to create different colors, and wherein the sensors detect light reflected by the color changing indicator from the wide band light source. The gas detector device may comprise a processor in communication with the at least two light sensors operable to receive detected reflected wavelength information from the light sensors, and determine the type of gas that reacted with the color changing indicator based on the color detected by the sensors, wherein each color may be associated with a different type of gas.

An instrument for processing and/or measuring a biological process comprises a plurality of filter assemblies configured to be interchangeably located along at least one of the optical paths. The plurality of filter components includes a first filter assembly characterized by a first optical power and a first filter having a first filter function, the first filter function characterized by at least one of a first low-pass wavelength or a first high-pass wavelength. The second filter assembly is characterized by a second optical power and a second filter having a second filter function, the second filter function comprising at least one of a second low-pass wavelength that is different than the first low-pass wavelength or a second high-pass wavelength that is different than the first high-pass wavelength.

A system for nucleic acid (NA) amplification includes a light source configured to emit a first excitation light based on a control signal, a reaction chamber configured to house a solution including a plurality of first nucleic acids (NAs), the plurality of first NAs being configured to amplify in response to the first excitation light, the solution being configured to emit a second light in response to heating by the first excitation light and to emit a third light in response to amplification of the plurality of first NAs, a detector configured to detect the second and third lights and to generate a temperature signal corresponding to the second light and a first fluorescence signal corresponding to the third light, and a lens module configured to focus the second and third lights onto the detector.

A device comprising: an optical emitter for emitting light having an emitted optical spectrum; an optical sensor for receiving light reflected from a tag attached to an object; and a processor configured to: determine a reflected optical colour spectrum of the light reflected from the tag based on an output of the optical sensor; retrieve an optical signature associated with said object from memory; and determine the authenticity of said object based on comparing the optical signature and the reflected optical colour spectrum.

An LED matrix lighting device for illuminating a lighting pattern with even intensity. The LED matrix lighting device includes a plurality of LEDs, a collimating lens in front of each LED for collimating light of the LED, and a light refracting element in front of collimating lenses arranged to refract light of at least a first part of the LEDs with a different refraction angle than at least a second part of the LEDs. The disclosure further relates to a machine vision system, a method, and a computer program product.

A chamberless smoke detector includes at least one light emitter and at least one light receiver and a transparent sheet above the at least one light emitter and the at least one light receiver.

The invention concerns a method for measuring the concentration of a substance or mixture of substances and/or determining the level in a fluid with intrinsic fluorescence, preferably fuel systems. The invention also refers to the optical device suitable for implementing the method, which comprises a unit which generates light for excitation of the sample; a unit of detection of the signal emitted by the sample and a unit of signal processing. The device and method by which it is implemented also allow the determination of the spatial distribution of the substance or mixture of liquid substances and/or the fluid level in a container. One of the main applications is the measurement of the concentration of oxygen in the fuel tank of aircrafts, based on the measurement of the intrinsic fluorescence of the fuel.

The present invention relates to the field of biochemical detection, and in particular to a reading apparatus for reading an assay result on a testing element. The reading apparatus comprises a first light-emitting element, a first photodetector and a light blocking element, wherein the first light-emitting element emits light and illuminates one or more corresponding areas of the testing element, the first photodetector receives light from one or more corresponding areas of the testing element, and the light blocking element guides a path of light emitted from a light emitting element and/or from a testing element. The light blocking element separates photodetectors in separate spaces, including a first light blocking element and a second light blocking element, wherein the first light blocking element is located between the first light-emitting element and the first photodetector, to guide the light emitted from the light emitting element to illuminate the testing element. The reading apparatus of the present invention allows light from a specific area of the testing element to be received by the photodetector and blocks invalid light from unrelated areas from entering the photodetector, thereby enhancing the accuracy and sensitivity of detection.