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公开(公告)号：FR2769139A1
公开(公告)日：1999-04-02
申请号：FR9712083
申请日：1997-09-29
Applicant: CORNING INC
Inventor： PRASSAS MICHEL , JACOB DAVID
IPC: G02B27/28 , H01S3/06 , H01S3/10 , H04B10/291 , H04B10/297 , H04J14/02 , H04N7/22 , H01S3/0941 , H04B10/20
Abstract: There is proposed an optical amplifier apparatus particularly for use in networks distributing signals by optical fibers, comprising first and second parallel optical branches (1, 2), the first optical branch (1) including optical amplifier means (5, 6) for amplifying digital signals and the second optical branch including optical amplifier means (7) for amplifying analogue signals, the optical amplifier means (5, 6) of the first optical path (1) being adapted to amplify bi-directional digital signals and the optical amplifier means (7) of the second optical branch (2) being adapted to amplify unidirectional analogue signals.
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公开(公告)号：FR2733224B1
公开(公告)日：1997-07-04
申请号：FR9504646
申请日：1995-04-19
Applicant: CORNING INC
Inventor： FREDHOLM ALLAN MARK , KERDONCUFF ALAIN , PRASSAS MICHEL
IPC: C03B17/02 , C03B37/012 , C03B19/02 , C03B37/027 , C03B40/04
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公开(公告)号：ES2092839T3
公开(公告)日：1996-12-01
申请号：ES94100542
申请日：1994-01-15
Applicant: CORNING INC
Inventor： GRATEAU LUC , PRASSAS MICHEL
Abstract: A photochromic glass with the compsn. (wt.%, oxide basis) 52-58 SiO2, 16-21 B2O3, 6-9 Al2O3, 1.5-2.8 ZrO2, 2-3.5 Li2O, 0-2.5 Na2O, 4-8 K2O, 2-3.5 CaO and 1.2-2.5 TiO2, with 0.15-0.25 wt.% Ag, 0.06-0.13 wt.% Br, 0.25-0.40 wt.% Cl and 0.003-0.007 wt.% CuO as photochromic components and 2-10 ppm Au and up to 0.9% Er2O3 displays a pink hue in the darkened state, and bodies at 2 mm cross section have optical properties comprising: (i) luminous transmittance over 82% when undarkened, (ii) 20-32% and 35-55% darkened luminous transmittance after 15 min. exposure to actinic radiation at 25 deg. C and 40 deg. C respectively, (iii) a recovery of at least 30% in transmittance, to at least 50% transmittance, 5 min. after removal from exposure, and (iv) x and y trichromatic coordinates of 0.3500-0.3700 and 0.3250-0.3450 respectively.
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公开(公告)号：FR2717915B1
公开(公告)日：1996-06-07
申请号：FR9403344
申请日：1994-03-22
Applicant: CORNING INC
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
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公开(公告)号：DE69208313D1
公开(公告)日：1996-03-28
申请号：DE69208313
申请日：1992-09-28
Applicant: CORNING INC
Inventor： LETURE MARCEL , DAUGER A , PRASSAS MICHEL
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.
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Patent Agency Ranking
公开(公告)号：SG167194G
公开(公告)日：1995-04-28
申请号：SG167194
申请日：1994-11-19
Applicant: CORNING INC
Inventor： PRASSAS MICHEL
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公开(公告)号：CA1333760C
公开(公告)日：1995-01-03
申请号：CA593311
申请日：1989-03-10
Applicant: CORNING INC
Inventor： PRASSAS MICHEL
Abstract: The present invention is related to transparent, fast darkening and fading photochromic glasses. The glasses contain SiO2, B2O3, Al2O3, ZrO2, Li2O, Na2O, K2O, MgO, CaO, SrO, BaO, ZnO, La2O3, Nb2O5, TiO2 as base glass components, Ag, Br, Cl, CuO as photochromic elements, with, optionally, Sb2O3, As2O3, and SnO2 as colorants to impart a brown color at darkening. The glasses have a refractive index greater than 1.585, an Abbe number greater than 42, and a density lower than about 2.80 g/cm3.
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公开(公告)号：DE69632540D1
公开(公告)日：2004-06-24
申请号：DE69632540
申请日：1996-09-17
Applicant: CORNING INC
Inventor： CARRE ALAIN , PRASSAS MICHEL , WAKU-NSIMBA JEAN
IPC: C04B41/87 , C03C17/00 , C03C17/30 , C09D4/00 , C09D183/04
Abstract: PCT No. PCT/US96/14906 Sec. 371 Date Mar. 5, 1998 Sec. 102(e) Date Mar. 5, 1998 PCT Filed Sep. 17, 1996 PCT Pub. No. WO97/13730 PCT Pub. Date Apr. 17, 1997A protective coating which imparts non-stick and abrasion resistant properties, as well as hydrophobic properties to an inorganic article, the coating being the composition product between hydroxyl groups on the surface of the inorganic article and a composition comprising a silane, a metal alkoxide and an acidified aqueous mixture of a lower alkanol. The silane content is at least 50% of the total sum of the silane plus the metal alkoxide. The metal alkoxide is at least 5% and preferably 10% of the total sum of the silane plus the metal alkoxide.
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公开(公告)号：IN188803B
公开(公告)日：2002-11-09
申请号：IN1474DE1993
申请日：1993-12-28
Applicant: CORNING INC
Inventor： GRATEAU LUC , PRASSAS MICHEL
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公开(公告)号：DE69619682D1
公开(公告)日：2002-04-11
申请号：DE69619682
申请日：1996-08-07
Applicant: CORNING INC
Inventor： PRASSAS MICHEL , KERDONCUFF ALAIN , GILLE FRANCOIS
Abstract: PCT No. PCT/US96/12916 Sec. 371 Date Feb. 13, 1998 Sec. 102(e) Date Feb. 13, 1998 PCT Filed Aug. 7, 1996 PCT Pub. No. WO97/09278 PCT Pub. Date Mar. 13, 1997The present invention relates to a method of making a rectangular bar have a gradient composition. In optical or ophthalmic applications, the gradient of composition ensures formation of a corresponding gradient of optical property, such as refractive index or optical density. The glass material is manufactured using a device containing several reservoirs, all designed to contain glass in the fluid state. According to the invention, the composition of the glass varies from one reservoir to the other so that the refractive indices, for example, of the three compositions are different, with an incremental progression. The fluid glass is deposited one composition on top of the next and then heated, creating a certain degree of interdiffusion between the layers. The glass is then heat-treated to create the desired property profile.
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