Abstract: A lightguide functioning as a luminaire. The luminaire includes at least one solid state light source, such as an LED, and a lightguide configured to receive light from the solid state light source. Light from the light source is coupled into the lightguide and transported within it by total internal reflection until the light exits the lightguide. A shape of the lightguide causes and directs extraction of the light, and can also be used to create a particular pattern of the extracted light. Such shapes include linear wedges and twisted wedges. Optical films can be included on the light input and output surfaces of the lightguide.

Abstract: Generally, the present disclosure provides for a light duct sensor that can monitor an average light flux through light duct useful for architectural lighting. The present disclosure provides for a system that allows a minimally obtrusive sampling of the light in a duct. It samples a small fraction of a cross sectional area of a light duct that is distributed across potentially the entire cross sectional area, without creating a significant disturbance to the light.

Abstract: The disclosure provides microstructured articles and methods useful for detecting an analyte in a sample. The articles include microwell arrays. The articles can be used with an optical system component in methods to detect or characterize an analyte.

Abstract: Retroreflective articles comprise a substrate and a bar code provided on the substrate. The bar code comprises at least one human-readable information which provides framing information and a machine-readable information which provides variable information. The human-readable information is visible under a first condition and invisible under a second condition, and the machine-readable information is invisible under the first condition and visible under the second condition.

Abstract: Retroreflective articles comprise a substrate and a bar code provided on the substrate. The bar code comprises at least one human-readable information which provides framing information and a machine-readable information which provides variable information. The human-readable information is visible under a first condition and invisible under a second condition, and the machine-readable information is invisible under the first condition and visible under the second condition.

Abstract: A light collimating horn assembly having two horns, one contained within the other. The horns have reflective surfaces facing each other. A light source, such as a ring of light emitting diodes, is located between the reflective surfaces of the horns. The horns at least partially collimate light from the light source transmitted between the reflective surfaces and exiting from the horns. The horns can be configured to provide controlled collimation in order to substantially collimate light for a spot light or partially but not substantially collimate light for a flood light.

Abstract: A light collimating horn assembly having two horns, one contained within the other. The horns have reflective surfaces facing each other. A light source, such as a ring of light emitting diodes, is located between the reflective surfaces of the horns. The horns at least partially collimate light from the light source transmitted between the reflective surfaces and exiting from the horns. The horns can be configured to provide controlled collimation in order to substantially collimate light for a spot light or partially but not substantially collimate light for a flood light.

Abstract: The disclosure provides microstructured articles and methods useful for detecting an analyte in a sample. The articles include microwell arrays. The articles can be used with an optical system component in methods to detect or characterize an analyte.

Abstract: The present disclosure relates to the formation of high contrast, wavelength independent retroreflective sheeting made by including a light scattering material on at least a portion of the retroreflective sheeting. The light scattering material reduces the brightness of the retroreflective sheeting without substantially changing the appearance of the retroreflective sheeting when viewed under scattered light.

Abstract: Methods of preparing adhesive-backed articles and methods of applying adhesives backed articles are described. The adhesive-backed articles include a compliant film and a pressure-sensitive adhesive having a microstructured surface opposite the compliant film.

Abstract: The present disclosure relates to the formation of high contrast, wavelength independent retroreflective sheeting made by including a light scattering material on at least a portion of the retroreflective sheeting. The light scattering material reduces the brightness of the retroreflective sheeting without substantially changing the appearance of the retroreflective sheeting when viewed under scattered light.

Abstract: Methods of preparing adhesive-backed articles and methods of applying adhesives backed articles are described. The adhesive-backed articles include a compliant film and a pressure-sensitive adhesive having a microstructured surface opposite the compliant film.

Abstract: A light directing composite film includes a planar top major surface, a planar bottom major surface, a plurality of lenticular lens elements disposed between the top major surface and the bottom major surface, and a plurality of light reflection regions and light transmission regions disposed between the plurality of lenticular lens and the planar bottom major surface.

Abstract: Generally, the present disclosure provides for a light duct sensor that can monitor an average light flux through light duct useful for architectural lighting. The present disclosure provides for a system that allows a minimally obtrusive sampling of the light in a duct. It samples a small fraction of a cross sectional area of a light duct that is distributed across potentially the entire cross sectional area, without creating a significant disturbance to the light.

Abstract: A coated abrasive article comprises an abrasive layer secured to a backing. The abrasive layer comprises abrasive particles secured by at least one binder to a first major surface of the backing. A supersize is disposed on at least a portion of the abrasive layer. The coated abrasive article has a melt flow zone adjacent to an edge of the coated abrasive article, wherein the melt flow zone has a maximum width of less than 100 micrometers, and the melt flow zone has a maximum height of less than 40 micrometers. Methods of using infrared lasers to ablate coated abrasive articles are also disclosed, wherein a laser wavelength is matched to a component of the coated abrasive article.

Abstract: One embodiment of the apparatuses, methods, and systems of the present disclosure is a license plate, sticker, or ALPR system having enhanced or increased accuracy. At least one of the license plate, sticker, or ALPR system includes useful information that is transmitted over a first channel and checking information that is transmitted over a second channel. The second channel is devoted solely to transmitting the checking information (e.g., the second channel does not transmit useful information). In other words, the license plates, stickers, and ALPR systems of the present disclosure include at least one channel that is devoted solely to transmitting checking information.

Abstract: The present disclosure describes a compact spotlight that can change the area which it illuminates. The spotlight incorporates a wide angle light source, a catadioptric lens, and a bearing system for moving the catadioptric lens, the light source, or both. Movement of the light source relative to the catadioptric lens along the optical axis can change the beam diameter of the spotlight, while providing an acceptable illumination pattern.

Abstract: The present disclosure provides a system and method for controlling spot lights, such as theater or display lights, which incorporates a handheld remote control that uses intuitive motions for selecting, positioning, dimming and other lighting setup functions. The present disclosure describes a spotlight control device, a lighting system including the spotlight control device, and a method for spotlight control. The spotlight control device incorporates a first light source that emits a first control beam that activates a desired spotlight. The activated spotlight can provide feedback to indicate that it has been activated. A second light source from the control device emits a second control beam that is used to direct the activated spotlight to an illumination region.