An optical measurement device includes an optical system that focuses emitted light that is emitted from a measurement surface of a light emitting electronic display or a light emitting surface of which a speckle contrast or a sparkle contrast is to be measured; a two-dimensional sensor array having a two-dimensional sensor array surface on which the emitted light is focused, the two-dimensional sensor array capturing an image of the emitted light; and a calculation unit that calculates the speckle contrast or the sparkle contrast based on the image of the emitted light captured under an imaging condition under which a size of a light-emitting region on the measurement surface is constant, the light-emitting region contributing to formation of a diffraction limited spot of the emitted light on the two-dimensional sensor array surface.

An optical sensing module for an electronic device is provided. The electronic device includes an opaque layer and an aperture formed on the opaque layer, wherein the optical sensing module includes an optical sensor; a light guide element, disposed between the opaque layer and the optical sensor and configured to guide light to the optical sensor through the aperture; and a diffusing layer, disposed between the opaque layer and the light guide element, configured to diffuse the light to the light guide element.

To calculate a probability of an optical sensor's irregular discharge, a light detection system includes an optical sensor, an application voltage generating circuit that applies a drive pulse voltage to the optical sensor, a discharge determining portion that detects the optical sensor's discharge, a discharge probability calculating portion that calculates a discharge probability for each of first and second states in which the optical sensor is shielded from light and the drive pulse voltage's width in the second state is different from the first state, a sensitivity parameter storing portion storing the drive pulse voltage's reference pulse width as the optical sensor's sensitivity parameter, and another discharge probability calculating portion that calculates an irregular discharge's probability that occurs without depending on the optical sensor's received light quantity, based on the sensitivity parameter, and the discharge probabilities calculated and the drive pulse voltage's widths in the first and second states.

A rotatable receptacle and method of assembling and mounting a rotatable receptacle. The receptacle includes an outer ring that has a mounting surface for mounting to a housing, and a rotatable insert that is received in the outer ring. An inner surface of the outer ring surrounds an outer surface of the rotatable insert. The rotatable insert has an electrical face configured to mate with a photoelectric device and an opposite mounting face for mounting to the housing. The rotatable insert is rotatable with respect to the outer ring to orient the rotatable insert in a desired direction for optimal positioning of the photoelectric device. The outer ring and the rotatable insert have corresponding interlocking features configured to fix the rotatable insert in the desired direction.

There is provided a microprocessor-controlled rover having light and positioning sensing capabilities for the semiautonomous taking of light level readings in a more accurate manner. In embodiments, the rover comprises a cosine and V lambda corrected light sensor. The system may comprise a control computer which generates a waypoint file comprising a plurality of investigative waypoints within investigative area boundary coordinates, including that which may be configured using an on¬screen GIS database interface. The investigative waypoints may be configured appropriately by the control computer, including in accordance with the relevant light audit settings. The waypoint file may be transmitted wirelessly to the rover. As such, the rover moves to each investigative waypoint according to the position sensed by the position sensor and the location specified by each investigative waypoint. At each investigative waypoint, the rover takes light level readings including in manners for enhancing the accuracy thereof.

The present disclosure is directed to devices and methods for simultaneously sensing irradiance with multiple photo sensors having different orientations, and determining direct and scattered components of the irradiance. One such device includes an aerial vehicle and an irradiance sensing device. The irradiance sensing device includes a base structure mounted to the aerial vehicle, and the base structure including a plurality of surfaces. A plurality of photo sensors are arranged on respective surfaces of the base structure, with each photo sensor having a different orientation.

An example method includes recording dark images on an image sensor on-board an orbital vehicle during flight, which include a first image recorded before the orbital vehicle is over a predefined location on the Earth and a second image recorded after the orbital vehicle is over the predefined location; and recording third and fourth images on the image sensor during flight based on illumination from a light source that is on-board, with the third image being recorded before the orbital vehicle is over the predefined location and the fourth image being recorded after the orbital vehicle is over the predefined location. A fifth image is recorded on the image sensor during flight while the predefined location on the Earth is visible to the image sensor. The fifth image is based on light from a ground-based calibration system. The light source is calibrated during flight based on the five images.

An example method includes recording dark images on an image sensor on-board an orbital vehicle during flight, which include a first image recorded before the orbital vehicle is over a predefined location on the Earth and a second image recorded after the orbital vehicle is over the predefined location; and recording third and fourth images on the image sensor during flight based on illumination from a light source that is on-board, with the third image being recorded before the orbital vehicle is over the predefined location and the fourth image being recorded after the orbital vehicle is over the predefined location. A fifth image is recorded on the image sensor during flight while the predefined location on the Earth is visible to the image sensor. The fifth image is based on light from a ground-based calibration system. The light source is calibrated during flight based on the five images.

In one respect, disclosed is a device or system for solar irradiance measurement comprising at least two irradiance sensors deployed outdoors at substantially different angles, such that, by analysis of readings from said irradiance sensors, a direct irradiance, a diffuse irradiance, a global irradiance, and/or a ground-reflected irradiance are determined. In some embodiments the disclosed device or system is stationary and has no moving parts.

The present disclosure relates to a method for photometrical charting of a light source (Q, 3) clamped within a positioning device (1) and stationary relative to an object coordinate system (T) by means of a luminance density measurement camera (4) arranged stationary relative to a world coordinate system (W), wherein the light source (Q, 3) is moved between a first actual measurement position (P1′) and at least one further actual measurement position (P2′ to P5′) along a kinematic chain of the positioning device (1) within the world coordinate system (W), wherein a luminance density measurement image (81 to 85) describing the spatial distribution of a photometric characteristic within a measurement surface is recorded by means of the luminance density measurement camera (4) in each actual measurement position (P1′ to P5′) with the light source (Q, 3) turned on, and wherein the position and/or orientation of the object coordinate system (T) relative to the world coordinate system (W) is recorded in each actual measurement position (P1′ to P5′) in direct reference to the world coordinate system (W) without reference to the kinematic chain of the positioning device (1). Moreover, the present disclosure relates to the use of such a method for photometric charting of a headlight (3).