GB1440726A - Rare earth composition for frequency conversion of radiation - Google Patents

Rare earth composition for frequency conversion of radiation

Info

Publication number
GB1440726A
GB1440726A GB3309974A GB3309974A GB1440726A GB 1440726 A GB1440726 A GB 1440726A GB 3309974 A GB3309974 A GB 3309974A GB 3309974 A GB3309974 A GB 3309974A GB 1440726 A GB1440726 A GB 1440726A
Authority
GB
United Kingdom
Prior art keywords
rare earth
composition
red
glass
infra
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3309974A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AUZEL F MORIN D
PECILE D
Original Assignee
AUZEL F MORIN D
PECILE D
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AUZEL F MORIN D, PECILE D filed Critical AUZEL F MORIN D
Publication of GB1440726A publication Critical patent/GB1440726A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/12—Silica-free oxide glass compositions
    • C03C3/23—Silica-free oxide glass compositions containing halogen and at least one oxide, e.g. oxide of boron
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C4/00—Compositions for glass with special properties
    • C03C4/12—Compositions for glass with special properties for luminescent glass; for fluorescent glass
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/50—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on rare-earth compounds
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2/00—Demodulating light; Transferring the modulation of modulated light; Frequency-changing of light
    • G02F2/02—Frequency-changing of light, e.g. by quantum counters

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Structural Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Glass Compositions (AREA)
  • Led Devices (AREA)

Abstract

1440726 Luminescent materials F AUZEL D MORIN and D PECILE 26 July 1974 [26 July 1973 19 April 1974] 33099/74 Heading C4S A rare earth composition for converting 0À85 to 1À06 Ám. infra-red into visible light comprises a mixture of PbF 2 , Yb 2 O 3 , at least one glass forming oxide of an element selected from B, Si, P, Ge and Te, and at least one compound (e.g. oxide or fluoride) containing Tm<SP>3+</SP> for blue emission, Er<SP>3+</SP> for red or green emission, and HO<SP>3+</SP> for green emission, the composition consisting of microcrystals containing the rare earths including the Yb, the microcrystals being formed in a mass of glass substantially consisting of the glass forming oxides, the lead fluoride ensuring obtention of the microcrystals. At least one oxide of an optically inactive rare earth of Y, La, Gd and/or Lu may be included. Component concentrations and four examples are given. Preparation is by mixing microcrystalline powders of high purity, melting the mix in a Pt crucible by heating first to 900‹ C. in a free air muffle furnace for a pre-reaction, and then up to 1000‹ C. for melting, pouring into a mould of the shape required for use and cooled to ambient, and either annealing the mould composition obtained in a furnace up to about 200‹ to 300‹ C., or crushing the composition and grinding it into a powder. The powder may be packed between glass sheets, sedimented in a synthetic transparent resin for coating and glueing to a support by polymerization of the resin, a through dispersion in a gel (e.g. silicone grease). Preferably the forming oxides are in lower concentrations so as to decrease the oxidized ions in the final host. A numerical segment display includes metal support (1) (Figs. 1, 2, not shown) with recesses filled with insulating material through which connecting wires extend, rare earth composition (2) with recesses for infra-red LEDs (3) enveloped in high refractive index glass, each diode being connected on one side to plate (1) and on the other to tongue (4). The segments (5) may be moulded either separately, or together with their support in which case opaque coating shields (7) may be provided of a metal or alloy layer or an organic layer. With smooth external surfaces, multi-dielectric layer (6) may be provided to confine the infra-red within the segments. Prior art materials are referred to, and optical converter applications as in prior art references are mentioned.
GB3309974A 1973-07-26 1974-07-26 Rare earth composition for frequency conversion of radiation Expired GB1440726A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7327486A FR2238679B1 (en) 1973-07-26 1973-07-26
FR7413707A FR2267988B2 (en) 1973-07-26 1974-04-19

Publications (1)

Publication Number Publication Date
GB1440726A true GB1440726A (en) 1976-06-23

Family

ID=26217862

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3309974A Expired GB1440726A (en) 1973-07-26 1974-07-26 Rare earth composition for frequency conversion of radiation

Country Status (2)

Country Link
FR (2) FR2238679B1 (en)
GB (1) GB1440726A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5332907A (en) * 1992-07-28 1994-07-26 Minnesota Mining And Manufacturing Company Method for recording and reproducing a radiation image, apparatus using said method, photostimulable phosphor panel for storing said radiation image
US5545595A (en) * 1993-08-27 1996-08-13 Sumita Optical Glass, Inc. Wavelength up-conversion transparent glass ceramics and a process for the production of the same

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4936650A (en) * 1986-04-24 1990-06-26 British Telecommunications Public Limited Company Optical wave guides
GB8713698D0 (en) * 1987-06-11 1987-07-15 British Telecomm Glass compositions
CA1294802C (en) * 1986-06-04 1992-01-28 Benjamin J. Ainslie Optical waveguides and their manufacture
GB8724736D0 (en) * 1987-10-22 1987-11-25 British Telecomm Optical fibre
FR2714046B1 (en) * 1993-12-16 1996-03-08 France Telecom Glass-ceramic materials, in particular for lasers and optical amplifiers doped with rare earths and process for manufacturing such materials.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5332907A (en) * 1992-07-28 1994-07-26 Minnesota Mining And Manufacturing Company Method for recording and reproducing a radiation image, apparatus using said method, photostimulable phosphor panel for storing said radiation image
US5545595A (en) * 1993-08-27 1996-08-13 Sumita Optical Glass, Inc. Wavelength up-conversion transparent glass ceramics and a process for the production of the same

Also Published As

Publication number Publication date
DE2433992A1 (en) 1975-02-27
FR2267988B2 (en) 1981-09-11
FR2238679A1 (en) 1975-02-21
DE2433992B2 (en) 1976-09-30
FR2267988A2 (en) 1975-11-14
FR2238679B1 (en) 1978-06-30

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19940725