摘要:
The device for disinfecting water comprises a gas discharge lamp including a discharge vessel with walls composed of a dielectric material, which walls are provided on their outer surfaces with at least a first and a second electrode, and which discharge vessel contains a gas filling containing xenon, the inner surface of the walls being at least partly covered with a coating containing a phosphor emitting in the UV-C range. Such a device for disinfecting water can always be made 100% operation within milliseconds, and the UV-radiation of the device has a spectral composition which lies exclusively in the range relevant for disinfecting, i.e. between 230 and 300 nm.
摘要:
A lighting system includes at least two light-emitting diodes each emitting, in operation, visible light in a preselected wavelength range. A converter converts part of the visible light emitted by one of the diodes into visible light in a further wavelength range so as to optimize the color rendition of the lighting system. The diodes include a blue light-emitting diode and a red light-emitting diode. Further, the converter includes a luminescent material for converting a portion of the light emitted by the blue light-emitting diode into green light.
摘要:
As a white light source, the lighting system (1) has at least three light-emitting diodes (6, 7, 8) for providing visible light at preselected wavelengths. The invention is characterized in that the lighting system (1) is provided with at least one fourth light-emitting diode (9) which, in operation, emits visible light in a further wavelength region, the maximum of the spectral emission of the fourth light-emitting diode (9) lying in the further wavelength region from 575 to 605 nm. Preferably, the further wavelength region ranges from 585 to 600 nm. Preferably, the color rendition of the lighting system (1) is above 60. Preferably, the luminous efficacy of the lighting system (1) is above 30 lm/W, preferably above 40 lm/W. In another preferred embodiment, the color temperature of the lighting system (1) can be adjusted by selectively switching the light-emitting diodes (6, 7, 8, 9).
摘要:
A plasma picture screen provided with a luminescent layer which comprises a blue Eu2+-activated phosphor and a UV-C light emitting phosphor. The mixing of an UV-C light emitting phosphor with an Eu2+-activated phosphor or coating of an Eu2+-activated phosphor with a UV-C light emitting phosphor or coating of a base layer of an Eu2+-activated phosphor with a covering layer of a UV-C light emitting phosphor clearly reduces the photodegradation of the Eu2+-activated phosphors in the VUV range.
摘要:
A metal M is chosen from the group formed by yttrium, aluminum and lanthanum, and a watery solution of a complex of M and an organic chelating agent is added to a suspension of luminescent material, which causes a layer of M2O3 to be deposited on the luminescent material, which is them separated, dried and fired.
摘要翻译:金属M选自由钇,铝和镧形成的组,并且将M和有机螯合剂的络合物的水溶液加入到发光材料的悬浮液中,这使得一层M 2 O 3沉积在 它们分离,干燥和烧制。
摘要:
A luminescent material is dispersed in a watery solution of sodium polyphosphate, a watery solution of a nitrate of the metal M is added, after which the luminescent material is separated, dried and fired. The metal is chosen from the group consisting of Ca, Sr, and Ba, whereby a protective layer of metal polyphosphate is formed on the luminescent material.
摘要:
Illumination system comprising a radiation source and a luminescent material comprising a first phosphor capable of absorbing part of the light emitted by the radiation source and emitting light of a wavelength different from that of the absorbed light; wherein said first phosphor comprises europium(III) as an activator in a host lattice selected from the compounds of an anionic oxygen-containing species with a cationic metal species, comprising yttrium(III) and gadolinium(III). A light-emitting diode as a radiation source is especially contemplated. The invention also relates to a red to amber yellow emitting europium(III)-activated phosphor comprises europium(III) as an activator in a host lattice selected from the compounds of an anionic oxygen-containing species with a cationic metal species, comprising yttrium(III) and gadolinium(III). Furthermore the invention relates to the use of the phosphor for general illumination, traffic and signage lighting, automotive and for backlighting of liquid crystal displays.
摘要:
A patient presses a finger concurrently against a needle (14) of a collection container (12) and a fingerprint surface (22, 52). In one embodiment, the patient's fingerprint is read electronically by a scanner (24) and correlated with a container serial number (16). In another embodiment, the patient's fingerprint is embossed in a foil layer (52). An analyzer assembly (40, 40′ 40″) analyzes the biological sample and reads either the container serial number or scans the fingerprint carrying layer (52) and sends the test results and either the fingerprint or container identification to a patient memory (30). Using the fingerprint information, a processor (32) correlates the test results with a record (60) of a corresponding patient. Alternately or additionally, the analyzer assembly includes a DNA analyzer (70) which measures preselected DNA characteristics (76) of the sample. The processor (32) compares the measured DNA subset characteristics with DNA subset characteristics (66) in the patient records to correlate or confirm the correlation of the analysis results with the proper patient.
摘要:
In the luminescent screen of a flourescent lamp an organic europium compound is incorporated for converting mercury radiation between 350 nm and 450 nm into red light. The organic europium compound is diluted in an organic polymer. When the fluorescent lamp is dimmed its colour point shifts into the red similar to incandescent lamps and not into the blue.
摘要:
A rare-gas low-pressure discharge lamp for generating ultraviolet light, in particular for cosmetic or therapeutic purposes, has a discharge vessel which is filled with rare gas and is at least partly transparent to UV light and which is at least partly coated with a phosphor which radiates UV light upon excitation by an excitation radiation produced in the discharge vessel so as to utilize a desired spectral range.