GB1143954A - Improvements in or relating to electromagnetic optical frequency changing devices - Google Patents

Improvements in or relating to electromagnetic optical frequency changing devices

Info

Publication number
GB1143954A
GB1143954A GB2473265A GB2473265A GB1143954A GB 1143954 A GB1143954 A GB 1143954A GB 2473265 A GB2473265 A GB 2473265A GB 2473265 A GB2473265 A GB 2473265A GB 1143954 A GB1143954 A GB 1143954A
Authority
GB
United Kingdom
Prior art keywords
crystal
energy
optical frequency
frequency changing
raises
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
GB2473265A
Inventor
Michael Richard Brown
William Brian Nash
Geoffrey Phillips
William Alexander Shand
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.)
MINI OF TECHNOLOGY
Minister of Technology
Original Assignee
MINI OF TECHNOLOGY
Minister of Technology
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 MINI OF TECHNOLOGY, Minister of Technology filed Critical MINI OF TECHNOLOGY
Priority to GB2473265A priority Critical patent/GB1143954A/en
Priority to NL6608110A priority patent/NL6608110A/xx
Priority to DE19661564332 priority patent/DE1564332A1/en
Publication of GB1143954A publication Critical patent/GB1143954A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7704—Halogenides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Conversion Of X-Rays Into Visible Images (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Glass Compositions (AREA)

Abstract

1,143,954. Luminescent materials. MINISTER OF TECHNOLOGY. 18 Aug., 1966 [11 June, 1965], No. 24732/65. Addition to 1,099,674. Heading C4S. An optical frequency changing device (e.g. an infra-red image converter) includes a crystal with host lattice of one of the fluorides of La, Ca, Sr and Ba containing 0À1 to 30 atom per cent (preferably 1 to 15) of trivalent.Th, and means for irradiating the crystal with light composed of at least two different wavelengths, for instance 1.65 and 1.2 microns, one of which raises the energy of the Th atoms to a higher energy than ground level and another, of 1.1 microns for instance, which raises the energy of the Th atoms from a higher than ground level to a still higher energy level, subsequent de-excitation causing emission of visible light, of 6500 Š for example. In an image converter, the active element may consist either of a bundle of light pipes or fibres, each pipe or fibre clad with, for example, NaCl or a glass of lower refractive index than the pipe; or uniform crystal elements sliced from a single crystal, coated with an opaque material on four sides and cemented together in the original configuration; or a single crystal. A separate pump source may be used.
GB2473265A 1965-06-11 1965-06-11 Improvements in or relating to electromagnetic optical frequency changing devices Expired GB1143954A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB2473265A GB1143954A (en) 1965-06-11 1965-06-11 Improvements in or relating to electromagnetic optical frequency changing devices
NL6608110A NL6608110A (en) 1965-06-11 1966-06-10
DE19661564332 DE1564332A1 (en) 1965-06-11 1966-06-10 Device for frequency conversion of electromagnetic radiation in the optical range

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2473265A GB1143954A (en) 1965-06-11 1965-06-11 Improvements in or relating to electromagnetic optical frequency changing devices

Publications (1)

Publication Number Publication Date
GB1143954A true GB1143954A (en) 1969-02-26

Family

ID=10216379

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2473265A Expired GB1143954A (en) 1965-06-11 1965-06-11 Improvements in or relating to electromagnetic optical frequency changing devices

Country Status (3)

Country Link
DE (1) DE1564332A1 (en)
GB (1) GB1143954A (en)
NL (1) NL6608110A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000173A (en) * 1977-06-24 1979-01-04 Philips Nv Luminescent screen

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019038354A1 (en) * 2017-08-24 2019-02-28 Basf Se Transmitter for transmitting data and for emitting electromagnetic radiation in the visible spectral range and data transmission system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000173A (en) * 1977-06-24 1979-01-04 Philips Nv Luminescent screen
GB2000173B (en) * 1977-06-24 1982-02-03 Philips Nv Luminescent screen

Also Published As

Publication number Publication date
DE1564332A1 (en) 1970-01-22
NL6608110A (en) 1966-12-12

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