The invention provides an optical particle sensor (1) comprising: at least one light source (2, 2r, 2g, 2b) configured to emit light rays (20), at least one channel (3) intended to receive a fluid transporting at least one particle (30), and to at least partially receive the light rays (20) emitted by the at least one source (2, 2r, 2g, 2b), such that said light rays (20) are partially scattered by the at least one particle (30), at least one photodetector (4) capable of receiving said scattered light rays (20),
said sensor (1) being characterised in that the at least one source (2, 2r, 2g, 2b) has an emission face (21) facing one side (D) of the sensor and in that the at least one photodetector (4) has a receiving face (41) facing the same side (D) of the sensor (1), such that the light rays received by the at least one photodetector are light rays (20b) backscattered by the at least one particle (30), for at least 90% of them.

A device for exciting objects with an excitation radiation and for detecting a photoluminescence radiation emitted by the objects after the absorption of the excitation radiation. The device includes a wall in contact with the objects, an organic light-emitting diode for emitting the excitation radiation and transparent to the photoluminescence radiation, an optical resonator tuned to the wavelength of the photoluminescence radiation and located on the side of the organic light-emitting diode opposite to the wall, and at least one sensor of the photoluminescence radiation arranged on the side of the optical resonator opposite to the organic light-emitting diode.

Optical property measurement using a sensor behind a display screen Examples of this application disclose a method for measuring optical properties of a target. The method comprises illuminating the target with an illumination area with a display screen in contact with the target, and analysing signals reflected from the target and transmitted back through the display screen to a sensor positioned behind the display screen, to determine the optical properties of the target.

The present invention is directed to a device consisting of a portable and multi-band UV light device that uses a combination of UVA, UVB, and UVC wavelength band of UV emitters. For detection, UV emitters are energized to a particulate collector that will fluoresce and glow when there is the presence of a wide range of different harmful aerosol droplet particles in the air that may be collected. This instant and positive visual detection with an available audio alarm alert indicates the presence of harmful aerosol droplet particles in the vicinity of this Instant Particulate Detector or IPD device, allowing the user to take immediate and corrective action. The user can also subsequently select disinfection utilizing UVC wavelength light to sterilize the particulate collector and Instant Particulate Detector or IPD device.

An apparatus to detect optical flatness of an OLED display layer includes a light-emitting assembly, a light-receiving assembly, and an image processor. The light-emitting assembly includes a light source and a first enhancement element. The light source emits reference light through the first enhancement element. The first enhancement element enhances brightness of the reference light and guides the enhanced reference light to a display layer of a display device being detected. The light-receiving assembly receives light reflected by the display layer according to the reference light and generates an image thereof. The image processor receives the image and obtains a result of detection as to surface flatness of the display layer according to the image.

A method for real-time surface imperfection detection for additive manufacturing and 3-D printing parts is provided. The method includes directing a first light radiation using one or more illumination sources, wherein the first light radiation illuminates a target area of a part being manufactured in a uniform chromatic light such that the target area appears to have a substantially uniform monochromatic color; capturing a current image of a second light radiation that is scattered or reflected by the target area using one or more feedback cameras; and analyzing the current image of the second light radiation using at least one of the one or more feedback camera with a previously acquired image to determine whether a surface imperfection exists or does not exist.

An instrument is provided that can monitor nucleic acid sequence amplification reactions, for example, PCR amplification of DNA and DNA fragments. The instrument includes a multi-notch filter disposed along one or both of an excitation beam path and an emission beam path. Methods are also provided for monitoring nucleic acid sequence amplifications using an instrument that includes a multi-notch filter disposed along a beam path.

According to one embodiment, a sensor includes a light emitter and a light sensor. The light emitter includes a first electrode, a second electrode, and a first light emitting layer. The second electrode is light-transmissive. The first light emitting layer is provided between the first electrode and the second electrode. The light sensor includes a third electrode, a fourth electrode, a fifth electrode, a first photoelectric conversion layer, and a second photoelectric conversion layer. the fourth electrode is light-transmissive. The fifth electrode is provided between the third electrode and the fourth electrode. The fifth electrode is light-transmissive. The first photoelectric conversion layer is provided between the third electrode and the fifth electrode. The second photoelectric conversion layer is provided between the fourth electrode and the fifth electrode.

The invention relates to an arrangement for a spatially resolved and wavelength-resolved detection of light radiation emitted from at least one OLED or LED. A multilayer system is arranged between an electrode, an OLED or an LED, and a substrate and is formed using layers formed alternately above one another from a material having higher and lower optical refractive indices n. In this respect, light radiation from the at least one OLED or LED and having a plurality of different wavelengths λ1, λ2, λ3, . . . λn thus exits the multilayer system. Light radiation that exits at different wavelengths λ1, λ2, λ3, . . . λn at different angles is incident onto at least one detector array after at least a simple refraction at an optical element or after reflection at a layer or at a layer system of a sensor such that light radiation at a wavelength λ1, λ2, λ3, . . . or λn is incident onto a respective detector element of the detector array. The detector elements of the detector array are arranged discretely from one another.

An apparatus and method are provided for differentiating multiple detectable signals by excitation wavelength. The apparatus can include a light source that can emit respective excitation light wavelengths or wavelength ranges towards a sample in a sample retaining region, for example, in a well. The sample can contain two or more detectable markers, for example, fluorescent dyes, each of which can be capable of generating increased detectable emissions when excited in the presence of a target component. The detectable markers can have excitation wavelength ranges and/or emission wavelength ranges that overlap with the ranges of the other detectable markers. A detector can be arranged for detecting an emission wavelength or wavelength range emitted from a first marker within the overlapping wavelength range of at least one of the other markers.