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4820445 |
Active material for the manufacture of laser rods
An active material for the manufacture of laser rods, having the chemical composition expressed by the formula A 1 +x B 1 -y C 3 -x O 7 -0.5 x, wherein A is barium, strontium, calcium, or a mixture...
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4818433 |
Process for producing lanthanum cerium aluminate phosphors
Lanthanum cerium aluminate phosphor compositions are disclosed wherein the formula for the phosphor can be characterized as follows: La 1 -x Ce x Al y O (3/2)(y+1) wherein O<x<1 and...
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4810416 |
Borate phosphor
A borate phosphor represented by the formula a(M II 1 -x, M IV x /2)O.bM V 2 O 5 .cM I 2 O.(B 1 -y-z,M III y , M VI z /2) 2 O 3 :dCe,eTb wherein M II is at least one divalent metal selected...
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4806825 |
Infra-red phosphors
A phosphor comprises a chromium activated alkaline earth aluminate having a hexagonal crystal structure and incorporates divalent europium as a sensitizer. The phosphor may also incorporate one or...
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4801398 |
Method of preparing fluorescent material of small particle size
A fluorescent material of small size is prepared by synthesizing a fluorescent material of predetermined molecular structure in a single phase, pulverizing the fluorescent material thus produced...
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4800319 |
Low-pressure mercury vapor discharge lamp
A low-pressure mercury vapor discharge lamp having a very satisfactory color rendition, (R(a,8)≥85), a color temperature of 2300-3300 K and a color point on or near the Planckian curve. The lamp...
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4798768 |
Luminescent alumino-silicate and/or alumino-borate glass comprising lanthanum and/or gadolinium and luminescent screen provided with such a glass
Luminescent alumino-silicate and/or alumino-borate glass comprising lanthanum and/or gadolinium and activated by Tb 3 + and/or Ce 3 + and have a composition comprising 35-85 mol % of SiO 2 and/or...
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4795588 |
Method of preparing a luminescent Eu.sup.2 + activated strontium aluminate
Method of preparing a luminescent Eu 2 + activated strontium aluminate defined by the formula Sr 4 Al 14 O 25 :Eu 2 + in which per mol of the Al present a combination of between 0.1 and 5 mol %...
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4792728 |
Cathodoluminescent garnet lamp
A cathodoluminescent lamp in the form of a vacuum diode or triode uses a self-supporting YAG crystal as the light emitter. The crystal shape can be selected (spherical, slab, bar) for desired...
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4791336 |
Fluorescent composition and fluorescent luminous device
A fluorescent composition capable of emitting light of various luminous colors under electron or ultraviolet excitation and a fluorescent luminous device having mounted such a fluorescent...
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4783596 |
Solid state scintillator and treatment therefor
A polycrystalline ceramic scintillator is disclosed for radiographic applications which has received a controlled oxidation anneal to reduce radiation damage otherwise occuring when said...
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4762639 |
Method of making terbium activated yttrium aluminate phosphor
A Y 3 Al 5 O 12 :Tb and method for producing the phosphor are disclosed. The method invloves forming a uniform mixture of source materials for Y 3 Al 5 O 12 :Tb phosphor and barium fluoride...
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4757232 |
Visual display system comprising epitaxial terbium-activated garnet material
A novel epitaxial phosphor having high luminosity at about 540 nm has the composition (Y 3 -x-y Tb x RE y )(Al 5 -w Ga w )O 12 , with RE being one (or more) 4f-type rare earth(s) other than Tb,...
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4755715 |
Pr:tb activated phosphor for use in CRTS
A phosphor for use in CRTs comprises (Y 3 -p-m-n R p Pr m Tb n )(Al 5 -q Z q )O 12 , where R is a lanthanide element and Z is a Group III element. One embodiment described is a single crystal of...
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4751148 |
Luminescent aluminoborate glass and luminescent screen provided with such a glass
Luminescent aluminoborate and/or aluminosilicate glass which is activated by one or more rare earth metals. The glass has a matrix comprising from 5 to 65 mol. % of one or more of the alkaline...
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4747973 |
Rare-earth-doped yttria-gadolina ceramic scintillators
Rare-earth-doped, polycrystalline yttria-gadolinia ceramic scintillators with high density, optical clarity, uniformity, cubic structure and which are useful in the detection of x-rays, include one...
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4746458 |
Photovoltaic material
A photovoltaic material comprises an open-cellular foam material having an internal surface area with a photoelectric semiconductor material formed thereon. The material may further include a...
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4733126 |
Phosphor and fluorescent lamp using the same
According to the present invention, there is provided a phosphor represented by a general formula (Ba w Ca x Mg y Eu z )O.aAl 2 O 3 . bSiO 2 where 0.1≤w≤0.5, 0.0004≤x≤0.0020,...
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4727283 |
Low-pressure mercury vapour discharge lamp
A low-pressure mercury vapor discharge lamp with a luminescent layer whose emission mainly lies in three spectral ranges and whose loading amounts to at least 500 W per m 2 surface area of the...
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4719033 |
Process for producing europium activated stronium tetraborate UV phosphor
A europium activated strontium tetraborate UV emitting phosphor is disclosed having a weight composition of from about 34.72% to about 35.80 strontium %, from about 17.66% to about 17.78 boron %,...
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4719387 |
Infra-red phosphors and fluorescent lamp containing the same
An infra-red emissive phosphor consists of chromium activated cerium manganese aluminate having a hexagonal crystal structure and represented by the general formula: ##EQU1## where x is from 0.3 to...
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4713577 |
Multi-layer faceted luminescent screens
A multi-layer luminescent screen includes a luminescent crystalline sublayer and a faceted overlayer. The faceted overlayer causes the emission from the screen of a greater fraction of the...
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4689172 |
Process of surface treating luminescent materials
The luminescent material(s) optionally composed of more color components are suspended in the solution of active agent(s) and treated with 0.5 to 10% by weight of glass forming acid or a mixture...
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4684592 |
Stimulable phosphor sheet
A stimulable phosphor sheet comprising a support, a phosphor layer containing a stimulable phosphor and a binder, and a protective film superposed in this order, which is characterized in that at...
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4683379 |
Lamp for emission of radiation in UV and visible light ranges of the spectrum
A sunlamp whose cylindrical envelope contains a mixture of three substances the first of which emits radiation with pronounced peaks in the red, blue and green bands of the visible range of the...
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4680231 |
Low-velocity electron excited phosphor
Low-velocity electron excited phosphor of the mixture-type is disclosed which is capable of being used for the patterning of phosphor layers by photolithography. The phosphor comprises a phosphor...
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4664849 |
Optical materials from intercalation of polyvalent cations in beta double prime alumina
Beta double prime alumina is provided having a sensible amount of at least one polyvalent cationic species intercalated therein. In accordance with a preferred embodiment, such beta double prime...
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4652793 |
Cathode-ray tube provided with a luminescent indium orthoborate
A cathode-ray tube provided with a luminescent screen comprising a luminescent indium orthoborate activated by trivalent chromium. The tube yields an efficient emission in the near infrared part of...
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4631144 |
Aluminate phosphor
A class of non-stoichiometric class of cerium and terbium co-activated magnesium aluminate phosphors is disclosed which are particularly useful in low pressure type fluorescent lamps. Said phosphor...
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4626068 |
Photoactive coating for hardening optical fibers
An improved optical fiber structure is provided which is hardened against the effects of ionizing nuclear radiation and comprises a conventional plastic, glass or silica optical fiber core and...
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4606846 |
Mixed rare earth metal, divalent transition metal, aluminum oxide
A mixed aluminum oxide having the following formula: X 1 (x.sbsb.1 -x s ) X 2 (x.sbsb.2 ) M 1 (y.sbsb.1 -y s ) M 2 (y.sbsb.2 ) Al (z.sbsb.1 -z s ) M 3 (z.sbsb.2 ) O 19 wherein X 1 and X 2 ,...
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4604549 |
Orange-yellow emitting phosphor and cathode-ray tube employing the same
Disclosed is an orange to yellow emitting phosphor, comprising an europium and terbium co-activated indium borate represented by the chemical compositional formula: (In 1 -a-b Eu a Tb b )BO 3...
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4604225 |
Refractory oxide hosts for a high power, broadly tunable laser with high quantum efficiency and method of making same
Refractory oxide crystals having high-quantum efficiency and high thermal stability for use as broadly tunable laser host materials. The crystals are formed by removing hydrogen from a single...
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4590405 |
Bivalent europium-activated barium aluminate phosphor and low mercury vapor discharge lamp provided with a phosphor
A luminescent screen provided with a luminescent layer (4) disposed on a support (1) and containing an alkaline earth metal aluminate activated by bivalent europium. The alkaline earth metal is...
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4568479 |
Method for preparing phosphor adapted for producing photosensitive layers from an acid slurry
Prior to preparing an acid phosphor slurry for use in preparing dry photosensitive phosphor layers, particulate yttrium, lanthanum and/or gadolinium oxysulfide or vanadate phosphor is mixed with...
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4566987 |
Scintillation glass
A colorless, cerium-and phosphorous-containing barium silicate glass, with a density of >3.3 g/cm 2 , a radiation length <43.5 mm, with strong fluorescence at 415-430 nm and with good...
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4565948 |
Fluorescent lamp
A fluorescent lamp having a phosphor film comprising: a blue-emitting phosphor consisting essentially of at least one divalent europium activated haloborophosphate phosphor having the general...
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4563297 |
Fluorescent composition
A fluorescent composition containing indium oxide and rare earth elements which can emit green, blue or red light under low-velocity electron excitation.
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4550256 |
Visual display system utilizing high luminosity single crystal garnet material
The disclosed display apparatus comprises a novel high intensity broadband-emitting phosphor. The phosphor is single crystal material in which Tb acts as sensitizer of Ce, the activator. The...
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4544997 |
Low-pressure mercury vapor discharge lamp
A low-pressure mercury vapor discharge lamp comprising a glass discharge envelope (1) in which during operation of the lamp a discharge is present and which contains mercury and a rare gas, at...
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4540915 |
Fluorescent lamp and phosphor coating composition used therefor
A fluorescent lamp having a phosphor layer composed of a glass material represented by the general formula: xLn 2 O 3 .yMO.wM'.vM 2 "O.zB 2 O 3 (wherein Ln is at least one element selected...
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4525628 |
Rare earth ceramic scintillator
An improved scintillator for a solid state radiation detector useful in CT (computed tomography), DR (digital radiography), and related technologies. The scintillator, rather than being grown as a...
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4524300 |
Luminescent screen and lamp containing the same
A luminescent screen provided with a luminescent layer formed on a carrier, which layer comprises an aluminate and/or a gallate of strontium and/or barium activated by bivalent europium or by...
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4518985 |
Projection type green cathode ray tube, method for manufacturing phosphor screen for the same, and projection video device using the same
A projection type green cathode ray tube (CRT) with improved brightness despite an increase in the temperature of the faceplate, a method for manufacturing a phosphor screen adopted therein, and a...
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4515827 |
Method of vapor coating phosphor particles
Red cathode ray phosphors are coated with a vapor deposited layer of cadmium selenide in order to achieve controlled color shifts in the light output of the phosphors. Such coated phosphors are...
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4512912 |
White luminescent phosphor for use in cathode ray tube
Disclosed is a white luminescent phosphor for use in a cathode ray tube, which comprises a mixture of at least one phosphor having a composition of the following formula: In 1 -p-q-r M p Eu q ...
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4479886 |
Method of making cerium activated yttrium aluminate phosphor
The luminous efficiency of Y 3 Al 5 O 12 :Ce phosphor can be increased by milling the phosphor to reduce its particle size, blending barium fluoride into the milled phosphor, and then reduction...
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4473518 |
Process for preparing a phosphor
A process for preparing a rare earth oxide type phosphor comprises compressing a starting mixture composed essentially of a matrix material for said rare earth oxide type phosphor, an activator...
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4473488 |
Process for reclaiming rare-earth metallic oxide and/or rare-earth metallic oxysulfide phosphors
To a suspension of rare-earth phosphors and sulfidic or selenidic phosphors there is added about 1 to 2% of the amount of hypohalogenite which would be necessary to convert the entire sulfidic or...
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4469619 |
Method of manufacturing a green phosphor
A method for manufacturing a luminescent material having the formula: Y 3 Al 5 O 12 : Tb in which the raw materials for the synthesis are combined in appropriate amounts together with a flux...
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