摘要:
The invention provides a a luminescent material comprising particles of UV-luminescent material having a coating, wherein the coating (a “multi-layer coating”) comprises a first coating layer and a second coating layer, wherein the first coating layer is between the luminescent material and the second coating layer, and wherein in a specific embodiment the second coating layer comprises an alkaline earth oxide, especially MgO. Further, the invention provides a lighting unit comprising such luminescent material.
摘要:
The invention provides a wavelength converting material comprising a compound of the formula (Y1-w-x-y-zScwLaxGdyLuz)2-a(S04)3:Mea, wherein Me represents trivalent cation or a mixture of trivalent cations capable of emitting UV-C radiation, and wherein each of w, x, y and z is in the range of from 0.0 to 1.0 and w+x+y+z@1.0, and wherein 0.0005@a@0.2. The wavelength converting material may be applied in an illumination device for UV illumination, in particular for sterilization or disinfection by germicidal UV illumination.
摘要:
The invention provides a beverage carbonator (1) for providing a carbonated beverage (2). The beverage carbonator (1) comprises (a) a CO2 generation unit (10) comprising a photo electrochemical cell (22) arranged to convert an organic compound (23) in a first liquid (21) comprising the organic compound (23) under influence of light (24) into at least CO2 and to produce a CO2 comprising gas (25), (b) a pressure regulator (30) arranged to pressurize the CO2 comprising gas (25), and (c) a mixing chamber (40) for mixing the CO2 comprising gas (25) under pressure into a second liquid (41) to provide the carbonated beverage (2).
摘要:
The invention provides a wavelength converting material comprising a compound of the formula (Y1-w-x-y-zScwLaxGdyLuz)2-a(S04)3:Mea, wherein Me represents trivalent cation or a mixture of trivalent cations capable of emitting UV-C radiation, and wherein each of w, x, y and z is in the range of from 0.0 to 1.0 and w+x+y+z@1.0, and wherein 0.0005@a@0.2. The wavelength converting material may be applied in an illumination device for UV illumination, in particular for sterilization or disinfection by germicidal UV illumination.
摘要:
The present invention provides a method of monitoring performance of a discharge lamp. The discharge lamp includes electrodes and a discharge vessel filled with gas and equipped with a luminescent layer, wherein the gas is intended to emit a first ultraviolet light in a first spectral range when the gas is excited by an electric field produced by the electrodes, and at least part of the first ultraviolet light is intended to be changed into a second ultraviolet light in a second spectral range of longer wavelength than the first spectral range by the luminescent layer. The method comprises the steps of finding the value of a first intensity of the first ultraviolet light; finding the value of a second intensity of the second ultraviolet light; and determining the conversion efficiency of the luminescent layer for converting the first ultraviolet light into the second ultraviolet light on the basis of the ratio of the value of the second intensity to the value of the first intensity.
摘要:
An optical reactor has a reactor enclosure defining a reaction chamber. In the reaction chamber, a light source operating at a very high frequency is arranged to radiate light to a fluid to be treated. A low voltage electrode is arranged to surround the light source. The light source is energized by a driving circuit which is arranged adjacent to the reactor enclosure. The driving circuit has a high voltage output terminal connected to a high voltage input terminal of the light source. The driving circuit has a low voltage output terminal which is connected to the low voltage electrode.