Example embodiments described herein involve a system for testing a light-emitting module. The light-emitting module may include a mounting platform configured to hold a light-emitting module for a camera. The mounting platform may also be configured to rotate. The system may further include a housing holding a plurality of photodiodes arranged in an array over at least a 90 degree arc of a hemisphere. The system may also include a controller configured to control the photodiodes and the rotation of the mounting platform.

The efficiency of the work for measuring electromagnetic waves is increased. A measuring device includes a position information obtaining unit, an electromagnetic wave information obtaining unit, a data storage unit, and a selecting unit. The position information obtaining unit obtains position information of a reflective prism 202, which is measured by a position measuring device 400. The electromagnetic wave information obtaining unit obtains illuminance information measured by an illuminometer 203, which is in the proximity of the reflective prism 202. The data storage unit stores the position information of the reflective prism 202 and the illuminance information in association with each other. The selecting unit compares information of predetermined measurement planned positions with the position information of the reflective prism 202 and selects the illuminance information at a position that has a specific relationship relative to one of the measurement planned positions.

A method and a gonioradiometer for the direction-dependent measurement of at least one photometric or radiometric characteristic of an optical radiation source. The emission direction of the photometric or radiometric characteristic is described using a system of planes (A, B, C), the planes of which intersect at an intersection line which passes through the radiation centroid of the radiation source, and using an emission angle (, , ) which specifies the emission direction (, , ) within a considered plane. A sensor or the radiation source is fastened to a multi-axis articulated robot. The robot is configured to only swivel about precisely one of its axes during a measuring process, in which measurement values relating to different emission angles (, , ) within a considered plane of the system of planes (A, B, C) or to different planes at a considered emission angle (, , ) are detected.

An optical receiver (100) for detection of light from one or more sources (108) comprises an opaque layer (102) disposed on a first surface. An aperture (104) is formed in the opaque layer. An optical detector (106) has a detection region disposed on a second surface. The first and second surfaces are spaced apart from one another such that light passing through the aperture (104) illuminates a corresponding illumination region (110) on the second surface, and is detected by the optical detector (106) In the event that the detection region overlaps the illumination region. Multiple apertures may be formed in the opaque layer, and/or multiple optical detectors may be disposed on the second surface. The optical receiver may thereby enable optical signals originating at different locations to be detected, and distinguished, over a wide field of view.

An additive manufacturing system may include a controller to determine an emissivity of a portion of a layer of build material based on a measured optical property of the portion, or based on object design data representing a degree of intended solidification of the portion. The controller may be to determine a temperature of the portion based on the determined emissivity and a measured radiation distribution emitted by the portion.

A display device includes a display, a first motor, an illuminance sensor, and a processor. The display displays information. The first motor changes a direction of a display surface of the display. The processor determines a first direction corresponding to a direction from a human sensor or the display surface to the eyes of the operator based on first sensing data output from the human sensor. The processor controls the first motor so that a normal direction of the display surface is the first direction when an illuminance of light incident from the first direction included in second sensing data output from the illuminance sensor is less than a first threshold. The processor controls the first motor so that the normal direction is a second direction different from the first direction when the illuminance of light incident from the first direction is the first threshold or more.

A technique for identifying a measurement planned position for electromagnetic waves in a three-dimensional space in a simple and easy manner is provided. A position of a measuring unit 200 that is carried by an operator 100 is measured by a position measuring device that is configured to measure a position by laser light. A positional relationship between the measured position and the position of a measurement planned position 601 is displayed on a terminal 300 that is carried by the operator 100. This display guides the operator 100, and the operator 100 identifies the measurement planned position 601 and measure illuminance thereat.

An optical sensing module including a lens and a sensing device is provided. The lens has an optical axis. The sensing device is disposed under the lens, wherein the sensing device is to receive an object beam passing the lens. The optical axis of the lens deviates from a geometric center of the sensing device. An optical sensing module including a prism film, a sensing device and a lens is further provided. The prism film has a plurality of prisms. The sensing device is disposed under the prism film, wherein the sensing device is to receive an object beam sequentially passing the prism film and the lens. The lens is disposed between the prism film and the sensing device.

System for calculating the exposure to sun radiation received on the different parts of the body by a person, comprising a wearable device (1) that communicates with a telecommunication mobile device (2) and a remote computing unit (3) operatively connected to satellites (4) to receive georeferenced data related to solar irradiation over time and set to associate the solar irradiance data to the geographical position, the posture and the orientation of the person (P) or of parts of the person's body.

The invention relates to a gonioradiometer for the direction-dependent measurement of at least one lighting or radiometric characteristic variable of an optical radiation source (2), having: an apparatus for moving a radiation source (2) during a measurement operation about a first axis (31) and about a second axis (32) that is perpendicular to the first axis (31); a measuring wall (5) exhibiting homogeneous reflection, on which the light from the radiation source (2) is reflected; and a locationally fixed and immovably arranged camera (7) having an optical unit (8) and a two-dimensional sensor chip (100). The camera (7) is arranged such that it captures light reflected on the measuring wall (5), wherein the reflected light is imaged by the optical unit (8) of the camera (8) onto the sensor chip (100) of the camera (7), and wherein the sensor chip (100) records measurement values as the radiation source (2) is rotated during a measurement operation, which measurement values indicate the lighting or radiometric characteristic variable substantially on a spherical surface about the radiation centroid of the radiation source (2). The invention furthermore relates to a method and a gonioradiometer for the direction-dependent measurement of at least one lighting or radiometric characteristic variable of an optical radiation source (2), in which provision is made for at least two fixedly installed sensors (1, 100) to be used which provide measurement values simultaneously during a measurement.