Abstract:
An infrared emitter, which utilizes a photonic bandgap (PBG) structure to produce electromagnetic emissions with a narrow band of wavelengths, includes a semiconductor material layer, a dielectric material layer overlaying the semiconductor material layer, and a metallic material layer having an inner side overlaying the dielectric material layer. The semiconductor material layer is capable of being coupled to an energy source for introducing energy to the semiconductor material layer. An array of holes are defined in the device in a periodic manner, wherein each hole extends at least partially through the metallic material layer. The three material layers are adapted to transfer energy from the semiconductor material layer to the outer side of the metallic material layer and emit electromagnetic energy in a narrow band of wavelengths from the outer side of the metallic material layer.
Abstract:
Purging of a light beam path in an effective manner that minimizes the affect of the purging requirement on system throughput. In one embodiment, the invention is incorporated into a birefringence measurement system that has several components for directing light through a sample optical element and thereafter detecting and analyzing the light. The segment of the beam path through the sample is isolated to reduce the volume that requires continual purging.
Abstract:
There is disclosed an optical radiation sensor system. The system includes a sensor device (140) and a cleaning device (115). The sensor device detects and responds to radiation from a radiation field (170) and includes a surface (155) that is movable with respect to the radiation field between a first position in which the surface is in the radiation field and a second position in which at least a portion of the surface is out of the radiation field. The cleaning device operates to remove fouling materials from at least a portion of the surface in the second position. The cleaning device may be a chemical cleaning device, a mechanical cleaning device or a combined chemical/mechanical device.
Abstract:
A solar ray collecting device is comprised of a supporting base plate on which a large number of hexagonal recesses are provided and a large number of optical systems are arranged on each of said recesses. Each of said optical systems is made up of a hexagonal focusing lense of a dimension that is approximately the same as the hexagonal recesses and of a head-cut hexagonal pyramid which extends downward from the light collecting lense as an upper surface of said recess. An optical conductor which is a light-receiving surface is provided on the focus of said light collecting lense. Furthermore, the upper internal circumferential surface of the side wall forming said recess is so formed that it may be able to move freely on the surface of said hexagonal pyramid.
Abstract:
PURPOSE: A wheel speed sensing device for a vehicle is provided to prevent the damage of a detecting sensor by installing a cap member that protects the detecting sensor from the radiant heat generated wile rotating a disk. CONSTITUTION: In a wheel speed sensing device for a vehicle, a tone wheel(21) mounted at a wheel shaft(16) penetrates a disk. A detecting sensor detects the rotating speed of the tone wheel by being installed near the tone wheel. A cap member protects the detecting sensor from the radiant wheel generated by the rotation of the disk. An opening that exposes the detecting sensor is formed at the one side of the cap member to detect the rotation speed of the tone wheel.
Abstract:
본 발명의 일 실시예에 따른 이물질 방지 장치는 외부 공기의 흡입 통로인 흡입구와 상기 흡입된 외부 공기를 배출하는 배출구를 포함하는 하우징; 상기 하우징의 내부에 존재하며, 상기 외부의 공기를 흡입하기 위하여 회전하는 팬; 및 상기 하우징과 센서를 연결하는 연결 브라켓을 포함할 수 있다.
Abstract:
A method, apparatus, and a computer program is provided. The method comprises: determining an ambient light value from ambient light data provided by at least one ambient light sensor, in dependence upon the spectral distribution of the ambient light data provided by the at least one ambient light sensor and a manufacturer of the at least one ambient light sensor.
Abstract:
A system for field measurement and calibration of photovoltaic reference devices, including a reference device electronics unit that measures the electrical output of a photovoltaic reference module and provides data to determine the solar irradiance received by the reference module as a function of its electrical output; and a calibrator unit that is used to routinely recalibrate the reference device electronics unit and the reference module, wherein the calibrator unit contains one or more calibrated photovoltaic reference cell(s).