Abstract: A system may include one or both of a light emitter and a light receiver. The system may include an optical filter adjacent one or both of the light emitter or the light receiver. The optical filter includes a wavelength selective scattering layer. The wavelength selective scattering layer may have a near-infrared scattering ratio of less than about 0.9. The filter may have a visible reflective haze ratio of greater than about 0.5. A method may include disposing the wavelength selective scattering layer adjacent one or both of the light emitter and the light receiver. An article may include the optical filter. The wavelength selective scattering layer may have an average near-infrared scattering of less than 60%, an average visible scattering of greater than 10%, and a difference between the % total visible reflectance and the % diffuse visible reflectance of less than 20.

Abstract: An example optical filter may include an angle blocking layer having a first angular light blocking range ?AL relative to a normal axis, and an interference filter adjacent the angle blocking layer having a second angular light blocking range ?IF relative to the normal axis. ?IF and ?AL at least partially overlap. The example optical filter has a predetermined light transmission zone comprising angles from 0° to a maximum light transmission angle ?Tmax relative to a normal axis of the major surface. The example optical filter has a predetermined angular light blocking zone ?B, a union of ?IF and ?AL. An example optical filter may include an interference filter having an incidence angle-dependent reflection band and an absorbing layer having an absorption band. The incidence angle-dependent reflection band and the absorption band may overlap at at least one wavelength at at least one angle of incidence.

Abstract: A display device is disclosed. The display device includes a display panel assembly and a backlight unit positioned behind the display panel assembly, the backlight unit including a light guide plate and a backplane assembly. The backplane assembly comprises a printed circuit board and a plurality of light sources distributed thereon. The backplane assembly may further include a reflector and a support frame. The backplane assembly also includes a plurality of standoffs sized to provide a small, predetermined gap between the light sources and the light guide plate. An adhesive disposed in the gap couples the light sources to a surface of the light guide plate.

Abstract: Gradient permittivity films are described. In particular, gradient permittivity films including a plurality of layers each having a thickness where at least one layer is perforated and has a different air volume fraction from another of the plurality of layers by at least 0.05. Such films may be useful in improving the signal to noise ratio for transmitting and receiving units operating between 20 GHz and 300 GHz behind a protective cover.

Abstract: A technique of determining the presence of a species in a sample may include passing light through an optical filter. In an example, the optical filter may include a spatially variant microreplicated layer optically coupled to a wavelength selective filter. The wavelength selective filter may have a light incidence angle-dependent optical band. The spatially variant microreplicated layer may be configured to transmit light to a first optical region of the wavelength selective filter at a first predetermined incidence angle and to a second optical region of the wavelength selective filter at a second predetermined incidence angle.

Abstract: Radar standing wave dampening systems and components are described. In particular, systems and components including an absorber composite including at least one of ceramic filler, magnetic filler, or conductive filler materials are described. Such components can reduce the intensity of standing waves and may also be combined in systems with one or more gradient permittivity tapes or films.

Abstract: The present disclosure discloses a method, an apparatus, a device, and a storage medium for determining a point of interest area, and relates to the field of automatic driving. The implementation solution is that the method is applied to an electronic device, and includes: receiving a point of interest area determination request input by a first user, the point of interest area determination request including a target area coverage; and acquiring grid data of at least one block within the target area coverage in response to the point of interest area determination request; acquiring, for each block, positioning data of a second user within each preset time period and number of parent points of interest; clustering corresponding grid data according to the positioning data, the grid data and the number of the parent points of interest; determining at least one POI area in each block according to a clustering result.

Abstract: A retroreflective article including a retroreflective layer including a structured surface that is opposite a major surface, a pressure sensitive adhesive that contacts at least a portion of the structured surface to form an optically inactive area that does not substantially retroreflect incident light and at least one low refractive index layer forming an optically active area that retroreflects incident light, wherein the optically active area comprises about 25% or less of the structured surface.

Abstract: An optical system including a lighting component and a switchable diffuser in optical communication with the lighting component. The optical system may further include a low absorbing optical component. At least one outer surface of the switchable diffuser and/or the low absorbing optical component includes light redirecting structures. When the switchable diffuser is in a first state and the optical system produces a light output, the light redirecting structures are configured to increase the full width at half-maximum (FWHM) of the light output of the optical system in at least one direction by at least 5 degrees relative to that of an otherwise equivalent optical system that does not include the light redirecting structures.

Abstract: A detector system is described that includes a detector that is sensitive to wavelengths in a detection wavelength range. The detector system further includes a light control film that is disposed on the detector and includes a plurality of alternating first and second regions. Each first region has a width W and a height H, where H/W?1. Each first region has a substantially low transmission in a first portion of the detection wavelength range and a substantially high transmission in the remaining portion of the detection wavelength range. Each second region has a substantially high transmission in the detection wavelength range.

Abstract: A backlight that includes a plurality of light sources coupled to a substrate, and a patterned diffuser over the plurality of light sources is disclosed. The patterned diffuser including a plurality of patterned reflectors coupled to a patterned diffuser body, where each patterned reflector is positioned to align with a corresponding light source. The backlight has a longitudinal direction, and the substrate and the patterned diffuser body have a maximum longitudinal substrate dimension (LMax,S) and a maximum longitudinal patterned diffuser body dimension (LMax,PDB), respectively, in the longitudinal direction. The backlight has a thermal alignment tolerance in the longitudinal direction at 60° C. is 500 microns or less, where the thermal alignment tolerance at the 60° C. is the absolute value of [the smaller of LMax,S and LMax,PDB] x [60° C. - 23.5° C. (room temperature)] x [substrate coefficient of thermal expansion (CTES) - light guide plate coefficient of thermal expansion (CTEPDB)].

Abstract: Display devices are disclosed including tiled components. The tiled components can include any one or more of tiled light board assemblies, tiled diffusers, and tiles patterned light guides. In some embodiments, entire backlight units may be tiled.

Abstract: A retroreflective system is disclosed that includes a retroreflective sheet for retroreflecting light, and a light control film disposed on the retroreflective sheet. For a first wavelength, light incident on the light control film at each of a first and second angles of incidence is retroreflected. For a second wavelength, light incident on the light control film at the first, but not the second, angle of incidence is retroreflected.

Abstract: Systems including one or both of a light emitter or a light receiver or a detectable object; and an optical filter adjacent one or both of the light emitter or the light receiver, wherein the optical filter includes at least one wavelength transmission selective layer an absorber component, wherein the wavelength transmission selective layer at least partially reduces the transmission of wavelengths from 701 nm to 849 nm incident thereon.

Abstract: An example article may include an optical filter and a multilayer stack adjacent the optical filter. The multilayer stack may include a plurality of layers. Each respective layer of the plurality layers may define a respective window edge of a plurality of window edges. The plurality of window edges may define an optical window configured to transmit light through the optical filter. At least a first respective window edge of the plurality of window edges may be stepped relative to at least a second respective window edge of the plurality of window edges.

Abstract: A display device is disclosed. The display device includes a display panel assembly and a backlight unit positioned behind the display panel assembly, the backlight unit including a light guide plate and a backplane assembly. The backplane assembly comprises a printed circuit board and a plurality of light sources distributed thereon. The backplane assembly may further include a reflector and a support frame. The backplane assembly also includes a plurality of standoffs sized to provide a small, predetermined gap between the light sources and the light guide plate. An adhesive disposed in the gap couples the light sources to a surface of the light guide plate.

Abstract: Example systems may include one or both of a light emitter and a light receiver, and an optical filter. The optical filter may include a wavelength selective scattering layer configured to scatter visible light. The optical filter may include a wavelength selective reflecting layer having a predetermined transmission band configured to compensate for a color deviation. The optical filter may include a broadband reflecting layer having a predetermined reflection band configured to compensate for a color deviation. The optical filter may include a low-index layer configured to reduce a color deviation in light emitted by the light emitter or received by the light receiver. The wavelength selective scattering layer may include nanoparticles dispersed in a binder, wherein the ratio of the nanoparticles to the binder by weight is at least 50%. Example articles may include example optical filters.

Abstract: An example optical filter may include an angle blocking layer having a first angular light blocking range ?AL relative to a normal axis, and an interference filter adjacent the angle blocking layer having a second angular light blocking range ?IF relative to the normal axis. ?IF and ?AL at least partially overlap. The example optical filter has a predetermined light transmission zone comprising angles from 0° to a maximum light transmission angle ?Tmax relative to a normal axis of the major surface. The example optical filter has a predetermined angular light blocking zone ?B, a union of ?IF and ?AL. An example optical filter may include an interference filter having an incidence angle-dependent reflection band and an absorbing layer having an absorption band. The incidence angle-dependent reflection band and the absorption band may overlap at at least one wavelength at at least one angle of incidence.

Abstract: An optical system including a lighting component and a switchable diffuser in optical communication with the lighting component. The optical system may further include a low absorbing optical component. At least one outer surface of the switchable diffuser and/or the low absorbing optical component includes light redirecting structures. When the switchable diffuser is in a first state and the optical system produces a light output, the light redirecting structures are configured to increase the full width at half-maximum (FWHM) of the light output of the optical system in at least one direction by at least 5 degrees relative to that of an otherwise equivalent optical system that does not include the light redirecting structures.

Abstract: An example optical filter may include an angle blocking layer Slaving a first angular light blocking range ?AL relative to a normal axis, and an interference filter adjacent the angle blocking layer having a second angular light blocking range ?IF relative to the normal axis. ?IF and ?AL at least partially overlap. The example optical filter has a predetermined light transmission zone comprising angles from 0° to a maximum light transmission angle ?Tmax relative to a normal axis of the major surface. The example optical filter has a predetermined angular light blocking zone ?B, a union of ?IF and ?AL. An example optical filter may include an interference filter having an incidence angle-dependent reflection band and an absorbing layer having an absorption band. The incidence angle-dependent reflection band and the absorption band may overlap at least one wavelength at least one angle of incidence.