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    • 3. 发明授权
    • Process and apparatus for manufacturing a porous SiO2 preform
    • 用于制造多孔SiO 2预制件的方法和设备
    • US06321573B1
    • 2001-11-27
    • US09328751
    • 1999-06-09
    • Hans-Georg FritscheUdo PeperFrank NeubauerHartwig SchaperJürgen Röper
    • Hans-Georg FritscheUdo PeperFrank NeubauerHartwig SchaperJürgen Röper
    • C03B37018
    • C03B37/0142C03B19/1423C03B2207/46C03B2207/52
    • In a known process for the manufacture of an elongated porous SiO2 preform, SiO2 particles are deposited on the mantle surface of a cylindrical carrier rotating about its longitudinal axis. The SiO2 particles are formed by means of a plurality of deposition burners which are arranged, at a distance from one another, in at least one burner row extending parallel to the longitudinal axis of the carrier. The burners are moved in a repeated cycle back and forth along the forming preform and between turnaround points where the direction of their motion is reversed. Measures are taken in the process to prevent or reduce overheating of the preform in the turnaround point regions. These measures can lead to variations in the rate of deposition. In order to prevent this it is proposed according to the invention that the measures comprise localized removal of heat from the turnaround points (7), or a localized heat shielding of the regions (8) around the turnaround points (7), and that these measures be kept time-constant within a motion cycle. As far as concerns an apparatus suitable for implementation for the manufacture of a porous SiO2 preform, with a cylindrical carrier rotatable about its longitudinal axis, with a plurality of deposition burners arranged in at least one burner row extending parallel to the carrier's longitudinal axis, connected with one another and at a distance from one another and with a jogging device which moves the deposition burners along the carrier and between turnaround points where the direction of the motion is reversed and by means of which burners SiO2 particles are deposited on the carrier, forming the preform, it is proposed that heat sinks (12) be provided in the regions (8) around the turnaround points (7).
    • 在用于制造细长的多孔SiO 2预制件的已知方法中,SiO 2颗粒沉积在围绕其纵向轴线旋转的圆柱形载体的地幔表面上。 SiO 2颗粒通过多个沉积燃烧器形成,沉积燃烧器在平行于载体的纵向轴线延伸的至少一个燃烧器排中相互间隔一定距离。 燃烧器沿着成形预制件和在其运动方向相反的转向点之间来回重复地循环移动。 在该过程中采取措施来防止或减少转瓶点区域中预成型坯的过热。 这些措施可能导致沉积速率的变化。 为了防止这种情况,根据本发明提出了措施包括从周转点(7)局部去除热量,或者围绕转向点(7)的区域(8)的局部热屏蔽,并且这些 措施在运动周期内保持时间常数。 关于适用于制造多孔SiO 2预成型件的装置,具有围绕其纵向轴线旋转的圆柱形载体,多个沉积燃烧器布置在平行于载体的纵向轴线延伸的至少一个燃烧器列中,连接 彼此间隔一段距离,并且具有慢跑装置,其使沉积燃烧器沿着载体移动,并且在运动方向相反的转向点之间,并且借助于燃烧器SiO 2颗粒沉积在载体上,形成 提出了在周转点(7)周围的区域(8)中设置散热器(12)。
    • 5. 发明授权
    • Method of producing quartz glass bodies
    • 生产石英玻璃体的方法
    • US6047564A
    • 2000-04-11
    • US29684
    • 1998-03-03
    • Hartwig SchaperKlaus Ruppert
    • Hartwig SchaperKlaus Ruppert
    • C03B8/04C03B19/14C03B20/00C03B37/014C03B37/018
    • C03B19/1423C03B37/01413C03B37/0142C03B37/01486C03B2207/36C03B2207/52C03B2207/62C03B2207/66C03B2207/70
    • In a known process for the production of quartz glass bodies, SiO.sub.2 particles are deposited of the mantle surface of a cylindrical carrier rotating about its longitudinal axis, forming an elongated, porous preform, where the SiO.sub.2 particles are formed in a plurality of flame hydrolysis burners which are arranged in at least one burner row parallel to the longitudinal axis of the carrier and are moved at a preset translational speed forward and back between turnaround points at which points their direction of movement is reversed, and in which process the preform is sintered. In order to make available on this basis an easily accomplished process that makes it possible to manufacture a preform which is largely free of localized density variations, the invention proposes on the one hand that the base value of the surface temperature of the preform being formed be kept in a range between 1,050.degree. C. and 1,350.degree. C., that the average peripheral velocity of the preform be kept in the range between 8 m/min and 15 m/min and the average translational velocity of the burner row be kept in a range between 300 mm/min and 800 mm/min. On the other hand, the object is also accomplished according to the invention and on the basis of the known process in that in the area of the turnaround points (A, B) the peripheral velocity of the preform being formed is increased and/or the flame temperature is lowered and/or the distance of the burners from the preform surface is changed.
    • PCT No.PCT / EP97 / 03818 Sec。 371日期1998年3月3日 102(e)1998年3月3日PCT 1997年7月17日PCT公布。 第WO98 / 03440号公报 日期1998年1月29日在用于生产石英玻璃体的已知方法中,SiO 2颗粒沉积在围绕其纵向轴线旋转的圆柱形载体的地幔表面上,形成细长的多孔预型体,其中SiO 2颗粒形成在 多个火焰水解燃烧器布置在平行于载体的纵向轴线的至少一个燃烧器列中,并且以预先设定的平移速度向前和向后移动,在转向点之间转动点,其中它们的运动方向相反,并且在该过程中 预成型件被烧结。 为了在此基础上提供一种易于实现的方法,其可以制造大部分没有局部密度变化的预成型件,本发明一方面提出,形成的预成型体的表面温度的基值为 保持在1050℃和1350℃之间的范围内,预型件的平均圆周速度保持在8m / min至15m / min之间的范围内,燃烧器排的平均平移速度保持在 范围在300mm / min到800mm / min之间。 另一方面,根据本发明,并且基于已知方法的目的也可以实现该目的,即在转向点(A,B)的区域中,形成的预制件的圆周速度增加和/或 火焰温度降低和/或燃烧器与预制件表面的距离改变。
    • 6. 发明授权
    • Method of making a jacketed preform for optical fibers using OVD
    • 使用OVD制造光纤夹套预制件的方法
    • US07089765B2
    • 2006-08-15
    • US10151846
    • 2002-05-20
    • Hartwig SchaperNorbert TreberOliver HumbachUwe HakenDonald Paul Jablonowski
    • Hartwig SchaperNorbert TreberOliver HumbachUwe HakenDonald Paul Jablonowski
    • C03B37/018
    • C03B37/01892C03B37/01205C03B37/01211C03B2201/12C03B2201/31C03B2203/22C03B2203/36
    • On the basis of a known process for the production of a preform for an optical fiber for optical data transmission technology, the productivity of the process for the production of complex refractive index profiles is to be improved by providing a quartz glass substrate tube which exhibits different doping in radial direction, introducing a core glass made of synthetic quartz glass into the substrate tube and covering the substrate tube with a jacket tube. A substrate tube suitable therefor is also being provided which tube requires less core glass material for the production of the preform, whether during the internal deposition or for the core glass rod in the rod-in-tube technique. Regarding the process it is proposed according to the invention that a substrate tube be used which was obtained by vitrification of a porous tube-shaped SiO2 blank, the substrate tube being provided with a core glass layer which is produced in that to the first radial portion of the SiO2 blank there is added before the vitrification a first dopant which increases the refractive index of quartz glass. The substrate tube according to the invention has in the radial direction regions of different doping whereby it incorporates a core glass layer which has a refractive index of at least 1.459.
    • 在制造用于光学数据传输技术的光纤预制件的已知方法的基础上,通过提供具有不同的折射率分布的石英玻璃基板管来提高制造复合折射率分布的方法的生产率 在径向上进行掺杂,将由合成石英玻璃制成的芯玻璃引入衬底管中并用套管覆盖衬底管。 还提供了一种适用于其的基底管,该管需要较少的核心玻璃材料用于生产预成型件,无论是在内部沉积期间还是在棒状管技术中用于芯玻璃棒。 关于该方法,根据本发明提出了使用通过多孔管状SiO 2空白玻璃化而获得的衬底管,衬底管设置有芯玻璃层,其为 在玻璃化之前加入到SiO 2的坯料的第一径向部分的第一掺杂剂增加了石英玻璃的折射率。 根据本发明的衬底管具有不同掺杂的径向区域,由此其包含折射率至少为1.459的芯玻璃层。