公开(公告)号：FR2793241B1

公开(公告)日：2002-03-08

申请号：FR9905761

申请日：1999-05-06

Applicant: CORNING INC

Inventor： PRASSAS MICHEL ,  JACOB DAVID ,  DE SANDRO JEAN PHILIPPE

IPC: C03C3/064 ,  C03C3/068 ,  C03C3/07 ,  C03C3/072 ,  C03C3/15 ,  C03C3/155 ,  C03C3/253 ,  G02B6/00 ,  C03C4/08 ,  H01S3/067 ,  H01S3/16 ,  H01S3/17 ,  G02B6/16

Abstract: A glass composition well suited for use in optical amplification consists of an erbium-doped borate glass composition comprising at least 30 mole percent of B2O3, not over 30 mole percent of SiO2, preferably not over 5 mole percent of La2O3, a ratio of B2O3 to (SIGMAX2O+SIGMAYO) that is at least 3.5, preferably 4.5, where X2O represents monovalent metal oxides(s) and YO represents divalent metal oxides, the glass providing a wide useful bandwidth (50 nm and greater) for optical amplification around the 1545 nm region.

公开(公告)号：CA2380051A1

公开(公告)日：2001-02-01

申请号：CA2380051

申请日：2000-06-16

Applicant: CORNING INC

Inventor： BROCHETON YVES A ,  JACOB DAVID ,  PRASSAS MICHEL ,  DICKINSON JAMES E JR

IPC: C03C3/118 ,  C03C3/095 ,  C03C3/102 ,  C03C3/105 ,  C03C3/108 ,  C03C3/11 ,  C03C3/112 ,  C03C3/115 ,  C03C4/00 ,  C03C4/12 ,  H01S3/06 ,  H01S3/17

Abstract: A glass composition suited for use in optical amplification includes a silicate which includes: at least 5o mole percent of SiO2, and at least one group III oxide, which may be selected from the group Al2O3 and B2O3, the ratio (R) of (X2O + YO) to said at least one group III ocide being less than or equal to 1.3, where X2O represents the sum of all alkali metal oxides present and YO represents the sum of all alkaline earth oxides and PbO and Z nO present. Fluorine may be included in the glass compositions. For composition s not including fluorine, it is preferred that the ratio R should be less than or equal to 1.0. The glass compositions are erbium-doped, and may be are co- doped with Yb2O3 and include dispersants such as Y2O3 and/or Gd2O3. This family of glasses possesses a flat gain characteristic in the 1545 nm region .

公开(公告)号：DE69510114D1

公开(公告)日：1999-07-15

申请号：DE69510114

申请日：1995-02-23

Applicant: CORNING INC

Inventor： BROCHETON YVES ANDRE HENRI ,  RICOULT DANIEL LOUIS GABRIEL ,  PRASSAS MICHEL

IPC: G02C7/10 ,  C03C3/089 ,  C03C3/11 ,  C03C4/06 ,  G02B1/02

Abstract: This invention is directed to photochromic glasses which darken to a brown coloration upon exposure to actinic radiation, which glasses have a refractive index of about 1.6, and Abbe number between 42-47, a density less than 2.82 g/cm³, and are preferably essentially free of Ti0₂. The glass compositions consist generally, in weight percent, of:Si0₂43-52K₂02-9Nb₂0₅0-5B₂0₃12.5-18Mg00-5Ag0.100-0.175Al₂0₃0-3Ca00-5Cl0.140-0.350Zr0₂6-14Sr00-9Br0.093-0.195Li0₂1.5-3.5Ba00-9Cu00.008-0.030Na₂00-3

公开(公告)号：FR2739392B1

公开(公告)日：1997-12-26

申请号：FR9511373

申请日：1995-09-28

Applicant: CORNING INC

Inventor： CARRE ALAIN ,  PRASSAS MICHEL ,  WAKU NSIMBA JEAN

IPC: C03C17/00 ,  C09D183/06 ,  B05D5/08 ,  C03C10/00 ,  C03C17/30 ,  C09D7/12

公开(公告)号：FR2739391B1

公开(公告)日：1997-12-26

申请号：FR9511372

申请日：1995-09-28

Applicant: CORNING INC

Inventor： CARRE ALAIN ,  PRASSAS MICHEL ,  WAKU NSIMBA JEAN

IPC: A47J36/02 ,  B05D5/08 ,  C03C17/00 ,  C03C17/30 ,  C09D4/00 ,  C09D183/06 ,  C03C10/00 ,  C09D7/12

公开(公告)号：FR2738237A1

公开(公告)日：1997-03-07

申请号：FR9510343

申请日：1995-09-04

Applicant: CORNING INC

Inventor： PRASSAS MICHEL ,  KERDONCUFF ALAIN ,  GILLE CLAUDE FRANCOIS MAURICE

IPC: C03B17/02 ,  C03B32/00 ,  C03B37/012 ,  C03B19/02

Abstract: Mfg. a rectangular cross-section bar made of a material with a composition gradient perpendicular to two opposite longitudinal sides of the bar, where the material doesn't melt at room temperature, comprises: (a) preparing at least two melted compositions of this material; (b) pouring continuously a sheet (61) of the first composition onto a flat support (4); (c) pouring continuously a sheet (62) of the second composition on the first sheet (61); and (d) ensuring thermal interdiffusion of the two sheets compositions to obtain the desired composition gradient in the cooled bar. Also claimed is an appts. for the mfr. of the above bar comprising: (i) a support (4) moving in a looped travel path with a flat part;(ii) a number of reservoirs (21,22,23) each receiving one of the material compositions and equipped with a bottom nozzle (31,32,33) to form a sheet (61,62,63) of the flowing material; where (iii) the reservoirs are spaced at intervals along the flat travelling part of the support (4) so that the sheets flow one onto the other. Further claimed is a preform (1i) of an optical device with an axial gradient of an optical property, cut from a bar (1) made of a vitreous material according to the above method.

公开(公告)号：MX9600069A

公开(公告)日：1997-02-28

申请号：MX9600069

申请日：1996-01-03

Applicant: CORNING INC

Inventor： BROCHETON YVES ANDRE HENRI ,  PRASSAS MICHEL ,  RICOULT DANIEL LOUIS GABRIEL

IPC: C03C3/095 ,  G02B03/00 ,  C03C03/00

Abstract: Esta invencion está dirigida a la produccion de vidrios utiles para aplicaciones oftálmicas que exhiben excelente resistencia al desarrollo de coloracion al ser expuestos a radiacion X y excelente resistencia al desarrollo de solarizacion; las composiciones de vidrio están esencialmente libres de plomo y consisten esencialmente, en porcentaje en peso, de: SiO2, 60-70; ZrO2, 0.5-2; TiO2, 0-1.5; B2O3, 0.5-5; CeO2, 0.1-0.3; Sb2O3, 0-0.5; Al2O3, 2-6; Li2O, 0-2; SO3, 0-0.3; Na2O, 9-14; MgO, 0-5; Br, 0-0.5; K2O, 3-10; SrO, 0-5; Cl, 0-0.5; CaO, 0.5-4; BaO, 0-5; F, 0-0.5; ZnO, 3-9.

公开(公告)号：DE69208313T2

公开(公告)日：1996-09-19

申请号：DE69208313

申请日：1992-09-28

Applicant: CORNING INC

Inventor： LETURE MARCEL ,  DAUGER A ,  PRASSAS MICHEL

IPC: B01D71/02 ,  C01B33/20 ,  C01G25/02 ,  C23C18/12 ,  C01G25/00

Abstract: A process to synthetize zircon as an ultra thin coating and comprising: (A) mixing an alcoholic sol resulting from hydrolysis of a silicon alkoxide with an alcoholic solution of a chelated zirconium compound and in the presence of and with a doping agent, until a homogenous mixed sol is obtained; (B) forming a matured sol containing colloidal particles and/or the polymeric entities from the mixed sol; (C) forming a coating of the matured sol on a microporous substrate; (D) drying slowly the sol coating into a gel coating free of flaws; and (E) firing the gel coating at a temperature of 900 to 1500 DEG C to form an ultra thin zircon layer. Use of the zircon layer obtained above as an ultrafiltration membrane or as a protective coating.

公开(公告)号：ES2076811T3

公开(公告)日：1995-11-01

申请号：ES93105390

申请日：1993-04-01

Applicant: CORNING INC

Inventor： GRATEAU LUC ,  LABORDE PASCALE ,  PRASSAS MICHEL

IPC: C03C3/068 ,  C03C4/00

Abstract: This invention relates to glasses exhibiting refractive indices higher than 1.880, Abbe numbers of at least 29, densities lower than 4.1, good chemical durability and stability against devitrification, and an integrated transmission over the range of 380-800 nm at a thickness of 10 mm greater than 79%, the glasses consisting essentially, expressed in terms of weight percent on the oxide basis, of

公开(公告)号：CA2140954A1

公开(公告)日：1995-09-23

申请号：CA2140954

申请日：1995-01-24

Applicant: CORNING INC

Inventor： BROCHETON YVES A H ,  PRASSAS MICHEL ,  RICOULT DANIEL L G

IPC: G02C7/10 ,  C03C3/089 ,  C03C3/11 ,  C03C4/06 ,  G02B1/02 ,  C03C3/087 ,  C03C3/093 ,  C03C3/097

Abstract: This invention is directed to photochromic glasses which darken to a brown coloration upon exposure to actinic radiation, which glasses have a refractive index of about 1.6, and Abbe number between 42-47, a density less than 2.82 g/cm3, and are preferably essentially free of TiO2. The glass compositions consist generally, in weight percent, of: SiO2 43-52 K2O 2-9 Nb2O5 0-5 B2O3 12.5-18 MgO 0-5 Ag 0.100-0.175 Al2O3 0-3 CaO 0-5 Cl 0.140-0.350 ZrO2 6-14 SrO 0-9 Br 0.093-0.195 LiO2 1.5-3.5 BaO 0-9 CuO 0.008-0.030 Na2O 0-3