Method for manufacturing grin lens and grin lens
    43.
    发明申请
    Method for manufacturing grin lens and grin lens 有权
    制造咧嘴透镜和笑脸镜片的方法

    公开(公告)号:US20070160854A1

    公开(公告)日:2007-07-12

    申请号:US10569280

    申请日:2005-04-12

    Abstract: A method for manufacturing a GRIN lens includes the steps of forming a wet gel provided with a concentration distribution having a different concentration of a refractive index distribution imparting metal that differs in concentration in a radial direction, drying the wet gel to form a dry gel having a bulk specific gravity ρ (g/cm3), sintering the dry gel to form a GRIN lens base material and stretching the GRIN lens base material while heating. The method is characterized in that, in the step of sintering the dry gel, partial pressures of oxygen during sintering at 800° C. or higher are 10−1 Pa or lower and also the relation between a rate of temperature increase ν (° C./hr) and a bulk density ρ of the dry gel during sintering at 1,000 to 1,150° C. is defined by ν≦105*EXP (−12ρ). As a result of this, the GRIN lens, which has a large numerical aperture and a small diameter, can stably and easily be manufactured.

    Abstract translation: 制造GRIN透镜的方法包括以下步骤:形成具有浓度分布的湿凝胶,所述浓缩分布具有不同浓度的在径向上浓度不同的折射率分布赋予金属,干燥湿凝胶以形成具有 堆积比重rho(g / cm 3),烧结干凝胶以形成GRIN透镜基材并在加热时拉伸GRIN透镜基材。 该方法的特征在于,在烧结干凝胶的步骤中,800℃以上的烧结时的氧分压为10〜PaPa以下, 的温度上升nu(℃/小时),在1000至1150℃的烧结期间的干凝胶的体积密度rho由nu <10×5×EXP(-12rho) 。 作为其结果,可以稳定且容易地制造具有大数值孔径和小直径的GRIN透镜。

    Method of making optical waveguide devices using perchloryl fluoride to
make soot
    48.
    发明授权
    Method of making optical waveguide devices using perchloryl fluoride to make soot 失效
    使用高氯氟化物制造光波导器件来制造烟灰的方法

    公开(公告)号:US6109065A

    公开(公告)日:2000-08-29

    申请号:US65961

    申请日:1998-04-24

    Abstract: Applicants have determined that much of the nonuniformity in solution doped preforms is due to nonuniformity of the soot layer caused by the high temperature necessary for complete reaction, and that MCVD fabrication using reaction temperature lowering gases such as nitrous oxide (N.sub.2 O) can produce more uniform soot layers. The conventional oxygen/reactant gas mixture presents a very small temperature window in which a uniform silica soot layer can be deposited without sintering. If the temperature in oxygen is too low, SiCl.sub.4 will not react completely and silicon oxychlorides will form. This degrades the soot layer and makes it unusable. If the temperature is too high the soot layer begins to sinter, decreasing the surface area and porosity. Adding a reaction temperature lowering gas lowers the reaction temperature and enables deposition of soot on the tube wall at a temperature substantially lower than the sintering temperature. This results in a more uniform, porous soot layer along the length of the preform and from one preform to another; and, in turn, the greater uniformity permits more uniform solution doping.

    Abstract translation: 申请人已经确定了溶液掺杂预制件中的大部分不均匀性是由于完全反应所需的高温引起的烟灰层的不均匀性,并且使用反应温度降低气体如一氧化二氮(N 2 O)的MCVD制造可以产生更均匀的 烟灰层。 常规的氧气/反应物气体混合物呈现非常小的温度窗口,其中可沉积均匀的二氧化硅烟灰层而不烧结。 如果氧气中的温度太低,SiCl4将不会完全反应并形成硅氧氯化物。 这会降低烟灰层,使其不可用。 如果温度太高,烟灰层开始烧结,减少表面积和孔隙率。 添加反应降温气体降低了反应温度,并且能够以基本上低于烧结温度的温度将烟灰沉积在管壁上。 这导致沿着预成型件的长度和从一个预成型件到另一个预制件的更均匀的多孔的烟灰层; 反过来,更大的均匀性允许更均匀的溶液掺杂。

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