Abstract:
A particulate detector (10) comprises a radiation source (12) arranged to emit radiation in at least first and second predetermined wavebands towards a sampling region (18) suspected of containing particulates, and a detection element (14), shielded from the radiation source (12), and arranged to detect radiation from the sampling region (18) at least first and second instances. The radiation source (12) is such that the emissions in the wavebands temporarily overlap. The detector is such that, at the instances at which the radiation is detected, the relative contributions from the emissions in each predetermined waveband are distinguishable, thereby allowing characteristics of the particulates to be determined. The radiation source (12) may comprise a light emitting diode (24).
Abstract:
Systems and methods may provide for receiving an electrical measurement signal from a first photodetector coupled to a first waveguide and determining a total intensity level of reflected light in the first waveguide based on the electrical measurement signal. Additionally, a perspiration level of skin in contact with the first waveguide may be determined based on the total intensity level of the reflected light in the first waveguide. In one example, an electrical control signal is received from a second photodetector coupled to a second waveguide that is physically isolated from the skin, wherein the total intensity level of the reflected light in the first waveguide is determined further based on the electrical control signal.
Abstract:
Ein optoelektronischer Sensor zur Erkennung von Objekten oder Objekteigenschaften umfasst einen Lichtsender zum Aussenden von Sendelicht in einen Erfassungsbereich, einen Lichtempfänger zum Empfangen von Empfangslicht und eine Auswerteeinheit, die dazu ausgebildet ist, anhand des von dem Lichtempfänger empfangenen Empfangslichts ein in dem Erfassungsbereich befindliches oder in diesen hineinragendes Objekt zu erfassen und/oder eine Eigenschaft des solchen Objekts zu ermitteln. Der Lichtsender umfasst ein monolithisches HalbleiterBauelement mit einer ersten lichtemittierenden Schicht und einer zweiten lichtemittierenden Schicht, wobei die erste lichtemittierende Schicht zum Emittieren von rotem Licht ausgebildet ist und die zweite lichtemittierende Schicht zum Emittieren von infrarotem Licht ausgebildet ist und wobei die zweite lichtemittierende Schicht eine zentrale Leuchtfläche und die erste lichtemittierende Schicht eine die zentrale Leuchtfläche umschließende, äußere Leuchtfläche definiert..
Abstract:
The present disclosure relates to a bi-directional reflective optical sensor module, an optical sensing accessory, and an optical sensing device. A bi-directional reflective optical sensor module (5) comprises a light source (110) and a first encapsulant (111), two photodetectors (120) and two second encapsulants (121), and a substrate (140). The bi-directional module emits light and detects light from two directions so that the light can be detected from different parts of a body. The optical sensing accessory and the optical sensing device comprise the bi-directional reflective optical sensor module and other electronic modules to have further applications.
Abstract:
The present disclosure relates to an optical sensing accessory, an optical sensing device, and an optical sensing system. An optical sensing accessory, an optical sensing device, or an optical sensing system comprises a plurality of reflective optical sensor modules (109) and other electronic modules to achieve multi-site measurement. A reflective optical sensor module comprises a light source, a photodetector, and a substrate. The light source is configured to convert electric power into radiant energy and emit light to an object surface. The photodetector is configured to receive the light from an object surface and convert radiant energy into electrical current or voltage. Multi-site sensing devices (16) improve measurement accuracy and user compliance to record their physiological condition.