138 results about "Absorption radiation" patented technology

An illumination system, comprising a radiation source and a monolithic ceramic luminescence converter comprising at least one phosphor capable of absorbing a part of light emitted by the radiation source and emitting light of wavelength different from that of the absorbed light; wherein said at least one phosphor is an europium(II) - activated oxonitridoaluminosilicate of general formula EA2-zSi5-aAlaN8-bOb:Euz wherein 0< a < 4, 0< b < 4 and 0 < z < 0.2; EA is at least one earth alkaline metal chosen from the group of calcium, barium and strontium provides a system with a converter that is effective for conversion of high energy radiation, such as radiation in the UV to blue range of the electromagnetic spectrum. . It is also effective, as it is a good transmitter of the light energy, that results from the conversion of the high energy radiation input. Otherwise the light would be absorbed in the material and the overall conversion efficiency suffers. The invention is also concerned with a monolithic ceramic luminescence converter comprising at least one phosphor capable of absorbing a part of light emitted by the radiation source and emitting light of wavelength different from that of the absorbed light; wherein said at least one phosphor is an europium(II) -activated oxonitridoaluminosilicate of general formula EA2-zSi5-aAlaN8-bOb:Euz wherein 0< a < 4, 0< b < 4 and 0 < z < 0.2; EA is at least one earth alkaline metal chosen from the group of calcium, barium and strontium.

The invention relates to a characteristic absorption spectrum radiation heat absorber, a Stirling engine and an operation method. By means of the radiation heat absorber, radiation energy can be fast absorbed by working medium gas in the Stirling engine, and when solar energy is insufficient, stable operation of the Stirling engine is ensured by adopting an auxiliary heating mode. A fast heat absorbing heater adopting characteristic absorption spectrum gas to absorb heat mainly comprises a heater base, an optical energy converting device, a heating tube, a combustion chamber and a heating tube valve. The optical energy converting device converts solar energy into radiation energy adjacent to a characteristic absorption peak of the working medium gas, and the working medium directly absorbs radiation energy stereoscopically. The radiation heat absorber is beneficial for enhancing radiation heat exchange at the hot end of the Stirling engine, efficiently using high-temperature energy of a focus sunlight center and reducing the dead volume of the hot end, solves the tube bursting problem of the Stirling heater, improves the engine efficiency, achieves photo-thermal complementary utilization and improves stability of the engine.

A measuring instrument for gravimetric moisture determination of a sample has a radiator, a weighing cell, and a sample receiver which can be connected to the weighing cell. The sample receiver allows the sample to be placed on or removed from the sample receiver. The radiator is positioned either above or below the sample, or both above and below, relative to the load direction of the weighing cell. A rotatably mounted heat conductor whose axis of rotation is orthogonal to the plane in which the sample or the sample receiver extends is positioned between the radiator and the sample. The heat conductor absorbs at least part of the radiation that impinges upon it and releases the absorbed radiation to the sample through at least one radiation-releasing surface. Through its ability to rotate, the heat conductor irradiates the entire sample surface.

A reflective reticle substantially reduces or eliminates pattern distortion that results from the absorption of EUV radiation while maintaining a reticle thickness consistent with industry standards. The reflective reticle includes a layer of ultra-low expansion (ULE) glass and a substrate of Cordierite having a thermal conductivity substantially larger than that of ULE glass. An aluminum layer is disposed onto a first surface of the ULE glass and a second surface of the ULE glass is polished to be substantially flat and defect-free. The Cordierite substrate can be directly bonded to the aluminum layer using anodic bonding to form the reflective reticle. Alternatively, a first surface of an intermediate Zerodur layer can be bonded to the aluminum layer, and a second aluminum layer can be used to anodically bond the Cordierite substrate to a second surface of the Zerodur layer, thereby forming the reflective reticle.