Methods, systems, and apparatus, for a stray-light testing station. In one aspect, the stray-light testing station includes an illumination assembly including a spatially extended light source and one or more optical elements arranged to direct a beam of light from the spatially extended light source along an optical path to an optical receiver assembly including a lens receptacle configured to receive a lens module and position the lens module in the optical path downstream from the parabolic mirror so that the lens module focuses the beam of light from the spatially extended light source to an image plane, and a moveable frame supporting the optical receiver assembly including one or more adjustable alignment stages to position the optical receiver assembly relative to the illumination assembly such that the optical path of the illumination assembly is within a field of view of the optical receiver assembly.

An infrared detector includes: a first light receiving layer having a first cutoff wavelength; a second light receiving layer having a second cutoff wavelength longer than the first cutoff wavelength; an intermediate filter layer having a third cutoff wavelength that is the same as or longer than the first cutoff wavelength and the same as or shorter than the second cutoff wavelength, the intermediate filter layer being disposed between the first light receiving layer and the second light receiving layer; a first barrier layer disposed between the first light receiving layer and the intermediate filter layer; and a second barrier layer disposed between the second light receiving layer and the intermediate filter layer.

An image sensor including: a substrate which has a first surface and a second surface opposite to the first surface and pixels arranged in a two-dimensional array, wherein each of the pixels includes a photodiode; a multi-wiring layer arranged on the first surface of the substrate; a color filter layer arranged on the second surface of the substrate and including color filters that respectively correspond to the pixels; and a lens layer arranged on the color filter layer and including a double-sided spherical lens, wherein the double-sided spherical lens includes at least two material layers having different refractive indexes.

An optical filter includes an absorption layer which increases a visible light transmittance while having a good near-infrared blocking characteristic, and which is excellent in not only adhesiveness with respect to a layer to be abutted, but also light resistance. The optical filter includes: an absorption layer containing a near-infrared absorbing dye containing a squarylium-based dye and a transparent resin; and an inorganic or organic material in contact with the absorption layer. The squarylium-based dye has a squarylium skeleton and condensed ring structures bonded thereto respectively on both sides thereof, the condensed ring structures each including a benzene ring and a nitrogen atom as an annular atom, each benzene ring having an urethane structure in the second position.

A proximity sensing device includes: a light source, a sensing unit, a light guide unit, and a window. The light source emits light, which is guided by the light guide unit to the window. The emitted light reflected by an object is received by the same window. The light guide unit includes a partial-transmissive-partial-reflective (PTPR) optical element, whereby the light emitted from the light source is reflected by the PTPR optical element, while the light reflected by the object passes through the PTPR optical element. There is only one window required.

The present disclosure relates to limitation of noise on light detectors using an aperture. One example embodiment includes a system. The system includes a lens disposed relative to a scene and configured to focus light from the scene onto a focal plane. The system also includes an aperture defined within an opaque material disposed at the focal plane of the lens. The aperture has a cross-sectional area. In addition, the system includes an array of light detectors disposed on a side of the focal plane opposite the lens and configured to intercept and detect diverging light focused by the lens and transmitted through the aperture. A cross-sectional area of the array of light detectors that intercepts the diverging light is greater than the cross-sectional area of the aperture.

An optical sensor system may include a light source. The optical sensor system may include a concentrator component proximate to the light source and configured to concentrate light from the light source with respect to a measurement target. The optical sensor system may include a collection component that includes an array of at least two components configured to receive light reflected or transmitted from the measurement target. The optical sensor system may include may a sensor. The optical sensor system may include a filter provided between the collection component and the sensor.

In a display device, when blue (B) light enters a first liquid crystal panel, radiated light radiated from the first liquid crystal panel contains red (R) phosphorescence having a wavelength range longer than blue (B) light due to a deterioration of a liquid crystal material. Thus, in the display device, an optical sensor device is provided behind a mirror comprised of a dichroic mirror to monitor or the like the service life of the first liquid crystal panel on the basis of a result of reception, at the optical sensor device, of light having a frequency band ranging from 600 nm to 650 nm, and makes notification of the result. Furthermore, on the basis of a result from the optical sensor device, an electrode used to suck impurities provided at the first liquid crystal panel is driven to sweep ionic impurities from a display region.

An optical device stack includes at least one of a photodetector or an optical emitter and a metasurface. The metasurface is disposed over a light-receiving surface of the photodetector or a light emission surface of the optical emitter. The metasurface includes a first conductive layer having an electrically-tunable optical property and an array of conductive nanostructures disposed on a first side of the first conductive layer. A second conductive layer is disposed on a second side of the first conductive layer. An electrical insulator is disposed between the first conductive layer and the second conductive layer. A change in an electrical bias between the metasurface and the second conductive layer, from a first electrical bias to a second electrical bias, tunes the electrically-tunable optical property from a first state to a second state, and changes an electrically-tunable optical filtering property of the metasurface.

An electronic device includes at least one grid structure that extends in rows and columns of a pixel array including a plurality of imaging pixels and is structured to separate the imaging pixels from one another to provide optical isolation between two adjacent imaging pixels, a grid shutter coupled to the grid structure and configured to allow a gas to enter the grid structure by opening a passage for the gas or block the gas from entering the grid structure by closing the passage in the grid structure, and a gas detection controller configured to identify the gas flowing into the grid structure based on an image that is acquired by the image sensor when the passage for the gas in the grid structure is opened to allow the gas to be present in the grid structure.