公开(公告)号：EP1296899A4

公开(公告)日：2004-11-17

申请号：EP01928353

申请日：2001-04-03

申请人： CORNING INC

发明人： ARAUJO ROGER J ,  BORRELLI NICHOLAS F ,  MCLAY ROBERT E ,  SEMPOLINSKI DANIEL R ,  SMITH CHARLENE M

IPC分类号： G02B1/00 ,  C03B8/04 ,  C03B19/14 ,  C03B20/00 ,  C03C3/06 ,  G03F7/20

CPC分类号： G03F7/70958 ,  C03B19/1407 ,  C03B19/1423 ,  C03B2201/21 ,  C03B2207/06 ,  C03B2207/20 ,  C03B2207/22 ,  C03B2207/32 ,  C03B2207/36 ,  C03B2207/50 ,  C03C3/06 ,  C03C2201/21 ,  C03C2203/40

摘要： An optical member includes a fused silica glass having a concentration of =SiH moiety below detection limit as measured by Raman spectroscopy and a concentration of molecular hydrogen of at least 1x1017 molecules/cm3. The fused silica glass exhibits an induced absorption level which quickly attains an initial peak upon exposure to irradiation and rapidly decays to a low value. The induced absorption level after decaying to the low value remains substantially unchanged by further irradiation.

公开(公告)号：EP1332116A4

公开(公告)日：2005-04-13

申请号：EP01968806

申请日：2001-09-12

申请人： CORNING INC

发明人： BROWN JOHN T ,  DOBBINS MICHAEL S ,  HECKLE CHRISTINE E ,  MCLAY ROBERT E ,  MISRA MAHENDRA K ,  POWERS DALE R ,  WASILEWSKI MICHAEL H

IPC分类号： C03B8/04 ,  C03B19/14 ,  C03B20/00

CPC分类号： C03B19/1423 ,  C03B19/1415 ,  C03B2201/03 ,  C03B2201/07 ,  C03B2201/21 ,  C03B2201/23 ,  C03B2207/06 ,  C03B2207/12 ,  C03B2207/20 ,  C03B2207/22 ,  C03B2207/32 ,  C03B2207/36

摘要： A method for preparing high-purity, bulk fused silica includes supplying silane gas (11), a gaseous fuel (8), and oxygen gas (10B) to a combustion burner (14). A fuel and oxygen mixture (13) is produces when fuel (8) and oxygen gas (10A) in a premixing chamber (12). Nitrogen gas (17A) may also be supplied to the burner (14) which is located in the crown (16) of a furnace (15). Silica particles are formed by passing the silane gas into a flame formed by the combustion reaction of the gaseous fuel with the oxygen gas while maintaining the ratio of the flow rate of the gaseous fuel to the flow rate of the silane gas no less than twelve and the ratio of the flow rate of the gaseous fuel to the flow rate of the oxygen gas no less than three. Silane flow rates are controlled with a mass flow controller (51) and the flow of other gasses is monitored with flow meters (49). The silica particles formed are immediately deposited onto a hot bait (18) inside a containment vessel (21) to form a boule (19).