公开(公告)号：WO0208133A3

公开(公告)日：2002-06-20

申请号：PCT/US0122475

申请日：2001-07-17

Applicant: BULAR LLC ,  SARKAR ARNAB

Inventor： SARKAR ARNAB

IPC: C03B19/14 ,  C03B37/014

CPC classification number: C03B19/1484 ,  C03B37/01486

Abstract: A process is disclosed for making a cylindrical glass preform by outside vapor deposition. Initially, a glass soot stream is directed from a deposition burner to a tapered mandrel, as the mandrel rotates about its longitudinal axis and as the burner reciprocates longitudinally along the mandrel. Mounted at opposite ends of the mandrel are a tubular glass handle and a glass tube having a closed end. After deposition has been completed, the mandrel is removed, leaving a porous glass preform with a central aperture and with the glass handle and the glass tube located at its opposite ends. The porous preform then is dehydrated and sintered into a dense glass preform, which is placed in an elongation machine that heats the end of the preform carrying the closed glass tube, while a vacuum is drawn from the central aperture via the handle. This collapses the aperture and elongates the preform into a solid glass rod.

Abstract translation: 公开了一种用于通过外部气相沉积制造圆柱形玻璃预制件的方法。 最初，当心轴围绕其纵向轴线旋转并且当燃烧器沿心轴纵向往复运动时，玻璃烟灰流从沉积燃烧器引导到锥形心轴。 在心轴的相对端安装有管状玻璃手柄和具有封闭端的玻璃管。 沉积完成后，去除心轴，留下具有中心孔的多孔玻璃预制件，玻璃手柄和玻璃管位于其相对端。 然后将多孔预成型件脱水并烧结成致密的玻璃预成型件，其被放置在伸长机器中，该机器加热携带封闭玻璃管的预成型件的端部，同时通过手柄从中心孔口抽出真空。 这会使孔径塌缩并使预成型件伸长成为固体玻璃棒。

公开(公告)号：WO1997048992A1

公开(公告)日：1997-12-24

申请号：PCT/US1997009853

申请日：1997-06-04

Applicant: YAZAKI CORPORATION ,  CHEN, Din-Guo ,  YAN, Yongan ,  RAYCHAUDHURI, Satyabrata ,  SOTO, Yoshitake ,  SARKAR, Arnab

Inventor： YAZAKI CORPORATION

IPC: G02B01/11

CPC classification number: G02B1/115 ,  C09D183/02 ,  C09D185/00 ,  Y10T428/31507 ,  Y10T428/31786 ,  Y10T428/31855

Abstract: A sol-gel process is disclosed for depositing multi-layer antireflection coatings on plastic substrates. One or more polymerized, titanium-containing solutions are provided by mixing a titanium alkoxide, an alcohol, and water, and one or more polymerized, silicon-containing solutions are provided by mixing a silicon alkoxide, an alcohol, and water. These solutions are applied to the plastic substrate in an alternating fashion, to produce a succession of uniform layers of polymerized titanium dioxide and polymerized silicon dioxide. Each layer is individually cured before the next layer is applied. The resulting coating of multiple polymerized layers provides very low reflectance over the entire visible wavelength range, yet with excellent mechanical strength and durability.

Abstract translation: 公开了用于在塑料基底上沉积多层抗反射涂层的溶胶 - 凝胶法。 通过混合钛醇盐，醇和水提供一种或多种聚合的含钛溶液，并且通过混合硅醇盐，醇和水来提供一种或多种聚合的含硅溶液。 这些溶液以交替的方式施加到塑料基材上，以产生一系列均匀的聚合二氧化钛层和聚合的二氧化硅层。 在施加下​​一层之前，各层被单独固化。 所得到的多个聚合层的涂层在整个可见光波长范围内提供非常低的反射率，但具有优异的机械强度和耐久性。

公开(公告)号：WO2006083354A2

公开(公告)日：2006-08-10

申请号：PCT/US2005/042079

申请日：2005-11-17

Applicant: NEXTROM HOLDING, S.A. ,  SARKAR, Arnab ,  ORCHANIAN, Bedros ,  VO, Kim, Nhu

Inventor： SARKAR, Arnab ,  ORCHANIAN, Bedros ,  VO, Kim, Nhu

CPC classification number: C03B37/0144 ,  C03B37/01406 ,  C03B37/01413 ,  C03B37/0142 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2207/50

Abstract: An improved flame-hydrolysis process is disclosed, for manufacturing large optical fiber core preforms, useful in the production of low water, single-mode optical fibers. In one feature of the invention, the preform is manufactured using a vapor axial deposition (VAD) apparatus to form an inner core and an outside vapor deposition (OVD) apparatus to form an outer core, wherein the VAD and OVD apparatus both are located within the same housing. In another feature of the invention, the concentration of a germanium dopant in the inner and outer cores is substantially uniform, but increases immediately adjacent the outer surface of the outer core. Further, the concentration of a fluorine dopant in a surrounding cladding layer decreases from a maximum value immediately adjacent to the outer core. These variations in dopant concentrations are selected to offset the effect on refractive index caused by diffusion of the germanium dopant while the preform is subsequently being processes.

Abstract translation: 公开了一种改进的火焰水解方法，用于制造用于生产低水单模光纤的大型光纤纤维预制棒。 在本发明的一个特征中，使用蒸气轴向沉积（VAD）装置制造预成型件以形成内芯和外部气相沉积（OVD）装置以形成外芯，其中VAD和OVD装置都位于 同样的住房。 在本发明的另一个特征中，内芯和外芯中的锗掺杂剂的浓度基本上是均匀的，但是紧邻外芯的外表面增加。 此外，周围包层中的氟掺杂剂的浓度从紧邻外芯的最大值减小。 选择掺杂剂浓度的这些变化以抵消由锗掺杂物的扩散引起的对折射率的影响，同时预成型件随后被处理。

公开(公告)号：WO1993013024A1

公开(公告)日：1993-07-08

申请号：PCT/US1992010695

申请日：1992-12-11

Applicant: YAZAKI CORPORATION ,  WANG, Shiho ,  RAYCHAUDHURI, Satyabrata ,  SARKAR, Arnab

Inventor： YAZAKI CORPORATION

IPC: C03B08/02

CPC classification number: C03B19/12 ,  C01B33/1585 ,  C03C1/006 ,  C03C3/06 ,  C03C2201/02 ,  C03C2203/26

Abstract: An improved sol-gel process for fabricating large, crack-free gel monoliths (e.g., of silica) is described in which a specially-tailored gel microstructure is provided by adjusting the relative concentrations of an alcohol diluent (e.g., ethanol) and/or one or more catalysts (e.g., HC1 and HF). Controlled variations in the gel's average pore radius, bulk density, rupture modulus, and elastic modulus over a wide range can be tailored in this fashion. This enables the process to be optimized for the particular application involved.

公开(公告)号：WO2006083354A3

公开(公告)日：2006-11-30

申请号：PCT/US2005042079

申请日：2005-11-17

Applicant: NEXTROM HOLDING SA ,  SARKAR ARNAB ,  ORCHANIAN BEDROS ,  VO KIM NHU

Inventor： SARKAR ARNAB ,  ORCHANIAN BEDROS ,  VO KIM NHU

IPC: C03B37/014

CPC classification number: C03B37/0144 ,  C03B37/01406 ,  C03B37/01413 ,  C03B37/0142 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2207/50

Abstract: An improved flame-hydrolysis process is disclosed, for manufacturing large optical fiber core preforms, useful in the production of low water, single-mode optical fibers. In one feature of the invention, the preform is manufactured using a vapor axial deposition (VAD) apparatus to form an inner core and an outside vapor deposition (OVD) apparatus to form an outer core, wherein the VAD and OVD apparatus both are located within the same housing. In another feature of the invention, the concentration of a germanium dopant in the inner and outer cores is substantially uniform, but increases immediately adjacent the outer surface of the outer core. Further, the concentration of a fluorine dopant in a surrounding cladding layer decreases from a maximum value immediately adjacent to the outer core. These variations in dopant concentrations are selected to offset the effect on refractive index caused by diffusion of the germanium dopant while the preform is subsequently being processes.

Abstract translation: 公开了一种改进的火焰水解工艺，用于制造大型光纤芯预制棒，用于生产低水，单模光纤。 在本发明的一个特征中，使用气相轴向沉积（VAD）设备来形成预成型件以形成内芯和外部气相沉积（OVD）设备以形成外芯，其中VAD和OVD设备都位于 同一个房屋。 在本发明的另一特征中，内芯和外芯中的锗掺杂剂的浓度基本均匀，但紧邻外芯的外表面增加。 此外，周围包层中的氟掺杂剂的浓度从紧邻外芯的最大值开始减小。 选择掺杂剂浓度的这些变化是为了抵消随着锗掺杂剂扩散而导致的对折射率的影响，同时预制棒正在被处理。

公开(公告)号：WO2002083581A2

公开(公告)日：2002-10-24

申请号：PCT/US2002/011932

申请日：2002-04-17

Applicant: BULAR, LLC ,  SARKAR, Arnab

Inventor： SARKAR, Arnab

IPC: C03B

CPC classification number: C03B37/0142 ,  C03B37/01446 ,  C03B37/01493 ,  C03B2207/50 ,  C03B2207/52 ,  C03B2207/62 ,  C03B2207/64

Abstract: An improved deposition machine is disclosed having a specially configured array of axially and azimuthally stacked burners, for depositing silica glass particles on an integral tube mandrel. The deposition machine includes a fire-polishing unit for fire-polishing the mandrel in-situ, immediately before the deposition process is performed, without having to cool, store and transfer the mandrel from one machine location to another. After the silica glass particles have been deposited on the mandrel, the preform is sintered. The integral tube mandrel preferably is configured to have a closed lower end, which enables the mandrel to be pressurized during both the fire-polishing step and the sintering step. This minimizes the risk of the mandrel losing its shape and it eliminates the possibility of heat rising through the tube mandrel by a chimney effect during the sintering step.

Abstract translation: 公开了一种改进的沉积机，其具有轴向和方位堆叠的燃烧器的专门配置的阵列，用于在整体管心轴上沉积二氧化硅玻璃颗粒。 沉积机器包括用于在即将进行沉积工艺之前就地对芯棒进行火抛光的防火抛光单元，而不必将心轴从一个机器位置冷却，存储和传送到另一个机器位置。 在将二氧化硅玻璃颗粒沉积在心轴上之后，预制件被烧结。 整体管心轴优选地构造成具有闭合的下端，这使得心轴在火焰抛光步骤和烧结步骤期间都能被加压。 这使得心轴失去其形状的风险最小化，并且其消除了在烧结步骤期间通过烟囱效应通过管心轴的热量升高的可能性。

公开(公告)号：WO1998021610A1

公开(公告)日：1998-05-22

申请号：PCT/US1997021203

申请日：1997-11-12

Applicant: YAZAKI CORPORATION ,  YAN, Yongan ,  CHEN, Din-Guo ,  SATO, Yoshitake ,  SARKAR, Arnab

Inventor： YAZAKI CORPORATION

IPC: G02B01/11

CPC classification number: G02B1/115 ,  G02B1/111 ,  Y10T428/258 ,  Y10T428/259 ,  Y10T428/2982

Abstract: A coated transparency, and method for making it, is disclosed, the transparency having a multi-layer antireflection coating that provides high transmittance with low specular reflectance, yet that also provides reduced visibility of surface defects. The coating includes alternating layers of polymerized silicon dioxide and polymerized titanium dioxide on a transparent substrate, with at least one of the layers incorporating discrete particles having a refractive index different from that of surrounding polymer. This provides the coating with a diffuse reflectance that is comparable to, or larger than, its specular reflectance, yet that still is negligible when compared to the coating's transmittance. The diffuse reflectance creates a loss of contrast for any reflected image or glare, thus masking any surface defects and providing a comfortable visual appearance. The successive layers of the antireflection coating are deposited on the substrate by applying separate solutions of an alkoxide, and alcohol, and water, and by curing the layer at an elevated temperature before the next succeeding layer is applied.

Abstract translation: 公开了一种涂覆透明体及其制造方法，该透明体具有提供高反射率的高透射率的多层抗反射涂层，而且还降低了表面缺陷的可见性。 涂层包括在透明基底上的聚合二氧化硅和聚合二氧化钛的交替层，其中至少一层包含具有不同于周围聚合物的折射率的离散颗粒。 这为涂层提供了与其镜面反射率相当或更大的漫反射率，但与涂层​​的透光率相比仍然可忽略不计。 漫反射造成任何反射图像或眩光的对比度损失，从而掩盖任何表面缺陷并提供舒适的视觉外观。 抗反射涂层的连续层通过施加醇盐和醇和水的分开溶液沉积在基材上，并且在施加下一个后续层之前通过在升高的温度下固化该层。

公开(公告)号：WO02083581A3

公开(公告)日：2003-02-13

申请号：PCT/US0211932

申请日：2002-04-17

Applicant: BULAR LLC ,  SARKAR ARNAB

Inventor： SARKAR ARNAB

IPC: C03B37/014

CPC classification number: C03B37/0142 ,  C03B37/01446 ,  C03B37/01493 ,  C03B2207/50 ,  C03B2207/52 ,  C03B2207/62 ,  C03B2207/64

Abstract: An improved deposition machine is disclosed having a specially configured array of axially and azimuthally stacked burners, for depositing silica glass particles on an integral tube mandrel. The deposition machine includes a fire-polishing unit for fire-polishing the mandrel in-situ, immediately before the deposition process is performed, without having to cool, store and transfer the mandrel from one machine location to another. After the silica glass particles have been deposited on the mandrel, the preform is sintered. The integral tube mandrel preferably is configured to have a closed lower end, which enables the mandrel to be pressurized during both the fire-polishing step and the sintering step. This minimizes the risk of the mandrel losing its shape and it eliminates the possibility of heat rising through the tube mandrel by a chimney effect during the sintering step.

Abstract translation: 公开了一种改进的沉积机，其具有轴向和方位堆叠的燃烧器的专门配置的阵列，用于在整体管心轴上沉积二氧化硅玻璃颗粒。 沉积机器包括用于在即将进行沉积工艺之前就地对芯棒进行火抛光的防火抛光单元，而不必将心轴从一个机器位置冷却，存储和传送到另一个机器位置。 在将二氧化硅玻璃颗粒沉积在心轴上之后，预制件被烧结。 整体管心轴优选地构造成具有闭合的下端，这使得心轴在火焰抛光步骤和烧结步骤期间都能被加压。 这使得心轴失去其形状的风险最小化，并且其消除了在烧结步骤期间通过烟囱效应通过管心轴的热量升高的可能性。

公开(公告)号：WO1994000396A1

公开(公告)日：1994-01-06

申请号：PCT/US1993006019

申请日：1993-06-23

Applicant: YAZAKI CORPORATION ,  WANG, Shiho ,  KIRKBIR, Fikret ,  RAYCHAUDHURI, Satyabrata ,  SARKAR, Arnab

Inventor： YAZAKI CORPORATION

IPC: C03B19/12

CPC classification number: C03B19/12 ,  F26B3/04 ,  F26B5/005 ,  F26B7/00 ,  F26B21/14

Abstract: A process and apparatus are described for rapidly drying a wet, porous gel monolith of glass or ceramic, at subcritical temperatures without inducing any cracking of the gel. The wet gel is immersed in a liquid solvent in a chamber, and the liquid solvent is then heated and expelled from the chamber. Further heating, with or without the presence of a flowing inert gas, fully dries the wet gel. When an inert gas is used, the gas is delivered to the chamber with a controlled solvent partial vapor pressure, to correspondingly control the driving force for drying the gel.

Abstract translation: 描述了一种方法和装置，用于在亚临界温度下快速干燥玻璃或陶瓷的湿多孔凝胶整料，而不引起凝胶的任何裂化。 将湿凝胶浸入室内的液体溶剂中，然后将液体溶剂从室中加热并排出。 进一步加热，有或没有流动的惰性气体的存在，将湿凝胶完全干燥。 当使用惰性气体时，气体以受控的溶剂部分蒸汽压力输送到室，以相应地控制干燥凝胶的驱动力。