Abstract:
The invention features devices and methods for collecting and measuring light from external light sources. In general, the devices of the invention feature a light diffusing element, e.g., as a component of a light collector, connected by a light conducting conduit, e.g., a fiber optic cable, to a light measuring device, e.g., a spectrometer. This light diffusing element allows, e.g., for substantially uniform light diffusion across its surface and thus accurate measurements, while permitting the total footprint of the device to remain relatively small and portable. This light diffusing element also allows flexibility in scaling of the device to permit use in a wide range of applications.
Abstract:
A radiance source (20) includes a housing (40) having an interior wall (42), wherein at least a spherical portion of the interior wall (42) of the housing (40) is spherical, an interior volume (46) and an exit port (48). A light source (82) is disposed within the interior volume (46) of the housing (40). A calibration structure (84) blocks and reflects a light ray that would otherwise travel directly from the light source (82) to the exit port (48) without reflecting from the interior wall (42). The calibration structure (84) has a calibration body (86) having a curved back surface (88) facing the light source (82) and a curved front surface (90) facing the exit port (48). There is an optically diffuse, lambertian reflecting surface (96) on at least the spherical portion of the interior wall (42) of the housing (40), the back surface (88) of the calibration body (86), and the front surface (90) of the calibration body (86).
Abstract:
Die Bestimmung des Lichtstromes (L) erfolgt getrennt, ohne feste Filtercharakteristiken parallel nach radiometrischer Strahlungsleistung (P) und Verlauf des optischen Strahlungsspektrums (w) eines Strahlers (11) mittels Messeinrichtungen einfachster Art an einer Dreiport-Ulbrichtkugel (12), nämlich mittels einer leistungskalibrierten Photodiode (13) und eines unkalibrierten Spektrometers (14). Deren schaltend verknüpften Ergebnisse (P, w) werden aus einer veränderbaren Helligkeitstabelle (17) frequenzabhängig bedämpft. Das liefert, insbesondere für die relativ monochromatisch abstrahlenden LEDs (11), auf kostengünstige Weise hoch reproduzierbar exakte Lichtstrom-Ergebnisse (L).
Abstract:
Es wird ein Lichtsender (1) beschrieben, der aus einem Hohlzylinder (10) mit einer hoch reflektierenden und diffus streuenden inneren Oberfläche, mit einer in dessen Inneren angeordneten Lichtquelle (26) und mit einer zur Lichtquelle beabstandeten Lichtaustrittsöffnung (14) besteht. Es wird auch ein Lichtempfänger (2) beschrieben, der aus einem ebensolchen Hohlzylinder (10) besteht, mit einem Lichtsensor (24) anstelle der Lichtquelle, beabstandet zu einer Lichteintrittsöffnung (32). Dabei sind Lichtquelle (26) bzw. Lichtsensor (24) mit solch einem Abstand zur Lichtaustrittsöffnung (14) bzw. zur Lichteintrittsöffnung (32) bei entsprechender Ausbreitungsrichtung des Lichts angeordnet, dass das von der Lichtquelle (26) ausgesendete bzw. vom Lichtsensor (24) empfangene und im Hohlkörper (10) mehrfach reflektierte Licht als diffuses Licht aus der Lichtaustrittsöffnung (14) austritt bzw. auf den Lichtsensor (24) fällt. Es wird ebenso eine Messeinrichtung unter Verwendung eines solchen Lichtsenders (1) oder Lichtempfängers (2) zur Messung optischer Eigenschaften von transparenten Substraten (4) beschrieben.
Abstract:
A multifunctional infrared spectrometer system (20) has an interferometer (27) which receives the infrared beam from a source (22) and provides a modulated output beam on beam paths to multiple spatially separated infrared detectors (77, 88). A multi-position mirror element (64) mounted at a junction position (63) receives the beam on a main beam path and directs it on branch beam paths to sample positions, with the beam then being directed on the branch beam path to one of the detectors (77, 88). One of the branch beam paths may include a sample holder (80) at the sample position which can index between a position at which a sample is analyzed, to a reference material position, or to a pass-through position for calibration purposes. The multi-position mirror element (64) may also be indexed to direct the beam on a branch path to a fiber optic cable (70, 76) including a probe (71). The multi-position mirror element (64) may be moved to a position at which the beam is directed on a beam path to and through an integrating sphere to a sample.
Abstract:
An optical position tracking system that tracks the position of objects, using light intensity and/or frequency with the application of geometry and ratios of detector responses, is provided, having light distributing and light detecting components (59) that employ the concepts of constructive occlusion and diffuse reflection. Diffusely reflective cavities (16), masks (M) and baffles (51) are used to improve certain radiating characteristics of the distributing components (59) and certain response characteristics of the detecting components (59), to tailor the radiation and detection profiles thereof, including them substantially uniform for all angles within a hemispheric area which the distributing and detecting components (59) face. The distributing and/or detecting components (59) are partitioned with specially configured baffles (51). A partitioned distributor has distinct emission sections where the sections can emit spectrally-different or distinguishable radiation. A partitioned detector has distinct detection sections where the sections can detect radiation from different directions.
Abstract:
Disclosed is a device for inspecting optical power measurement of a light emitter, the device including: a reference light emitter; a measurer configured to measure optical power by receiving light emitted from one of the reference light emitter and a plurality of inspection target light emitters, the measurer including an integrating sphere, a photodiode detector, and a photocurrent or photovoltage measurement device; and a controller configured to calculate a first average of optical power of the plurality of inspection target light emitters by measuring first optical power of a first inspection target light emitter among the plurality of inspection target light emitters, and generate an alarm to stop using the measurer when a difference between the first average and a second optical power of the reference light emitter exceeds a first threshold. Thus, the inspection is more accurately and reliably carried out.
Abstract:
A photoreceiver device includes a light detector connected between a power supply node and a first node, and first to third switching elements. The light detector is configured to detect an incident optical data signal, and to output photocurrent corresponding to a magnitude of the optical data signal through the first node. The first switching element is connected between the first node and a ground node. The second switching element is connected between the power supply node and a second node. The third switching element is connected between the second node and the ground node. The third switching element has a control node connected to the first node.
Abstract:
A testing device for measuring the light characteristics of an electronic component includes an inlet at one end at which an electronic component can be presented for testing. A shutter is located at the inlet and is moveable between a first open position in which an electronic component can be received into the inlet, and a second closed position in which the shutter can overlay at least the majority of a nest on which said electronic component is supported, so that the shutter prevents light emitted by the electronic component from being diverted away from the testing device. The shutter includes at least one sliding door that can be slid to move the shutter into its first and second open positions. The at least one sliding door includes a cut out portion that defines said opening when the shutter is in its second closed position.