Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides
Patent
1996-11-20
1998-05-26
Bonner, Melissa
Compositions
Inorganic luminescent compositions
Compositions containing halogen; e.g., halides and oxyhalides
501 44, 501 45, 501 48, 501 41, C03C 3247, C03C 324, C03C 412
Patent
active
057559988
ABSTRACT:
According to the present invention, there is provided a fluorophosphate fluorescent glass, capable of converting invisible ultraviolet rays into visually observable visible rays with a high efficiency and available for controlling the optical axis of a laser beam such as excimer laser, etc. The feature of this fluorescent glass consists in a fluorophosphate fluorescent glass capable of exhibiting fluorescence in the visible region, having a chemical composition comprising, at least, (I) phosphorus (P), oxygen (O) and fluorine (F), as glass constituting components, and (II) at least one member selected from the group consisting of divalent europium, terbium, samarium and manganese, as a fluorescent agent, the divalent europium being contained as an essential component and at least one of samarium and manganese being contained as an essential component when terbium is contained. In particular, a fluorophosphate fluorescent glass exhibiting a blue fluorescence containing europium as an essential component and a fluorophosphate fluorescent glass exhibiting a white fluorescence containing at least one of samarium and manganese as an essential component are provided.
REFERENCES:
Brundage et al., "Homogeneous Linewidth Of The .sup.5 D.sub.0 -.sup.7 F.sub.0 Transition Of Trivalent Europium In A Fluorophosphate Glass", Physical Review B (Condensed Matter), vol. 53, No. 14, pp. R8821-R8823 (Apr. 1, 1996).
Dmitryuk et al., "Spectroscopy Of Electron Phototransfer In Europium-Doped Phosphate Glasses", Glass Physics and Chemistry, vol. 19, No. 1, pp. 16-18 (1993).
Database WPI, Section Ch, Week 7514, Derwent Publications Ltd., London, GB, Class L01, AN 75-23099W, XP002025049 & JP-A-49 099 609 (Santoku Metal Industry), Sep. 20, 1974 *abstract*.
Tanabe et al., "Upconversion Properties, Multiphonon Relaxation, And Local Environment of Rare-Earth Ions In Fluorophospate Glasses", Physical Review B (Condensed Matter), vol. 45, No. 9, pp. 4620-4625 (Mar. 1, 1992).
Brundage et al, "Homogenous Linewidth of the .sup.5 D.sub.0 -.sup.7 F.sub.0 Transition of Europium in a Fluorophospate Glass", Apr. 1, 1996.
Nagahama Shinobu
Otsuka Masaaki
Sawanobori Naruhito
Yamazaki Masaaki
Bonner Melissa
Sumita Optical Glass Inc.
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