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1. 发明专利

JP2003321235A Method for dehydrating and sintering porous preform for optical fiber 审中-公开
标题翻译：用于光纤的脱水和烧结多孔预制的方法
公开(公告)号：JP2003321235A
公开(公告)日：2003-11-11
申请号：JP2002126537
申请日：2002-04-26
申请人： Hitachi Cable Ltd , 日立電線株式会社
发明人： KAWASE KENJI , SHIRAI YUSUKE , IKEDA YUICHI , YOSHIZAWA SUSUMU , SEKI HIROAKI
IPC分类号： C03B37/014
CPC分类号： Y02P40/57
摘要： PROBLEM TO BE SOLVED: To provide a method for dehydrating and sintering a porous preform for an optical fiber capable of improving yield and dehydrating and transparentizing the porous preform as far as to its base end to form into transparent glass. SOLUTION: In the method for dehydrating and sintering the porous preform for the optical fiber, the porous preform for the optical fiber 4 is inserted, while holding one end of a core section 9 of the preform, into a furnace core tube 2 heated to a high temperature to be dehydrated or sintered. The method is characterized in that the porous preform for the optical fiber 4 is inserted into the furnace core tube 2 after a shielding plate 7 for retaining the heat within the furnace core tube 2 is mounted on the base end 6 of the porous preform for the optical fiber 4. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种用于脱水和烧结用于光纤的多孔预成型体的方法，该多孔预成型体能够提高成品率，并将多孔预型体脱水和透明化至其基端至形成透明玻璃。解决方案：在用于光纤的多孔预成型件的脱水和烧结的方法中，将保持预成型体的芯部9的一端的光纤4的多孔预成型件插入炉芯管2中加热至高温脱水或烧结。该方法的特征在于，在用于将炉芯管2内的热量保持的屏蔽板7安装在多孔预成型件的基端6上之后，将用于光纤4的多孔预成型件插入炉芯管2中光纤4.版权所有（C）2004，JPO

2. 发明专利

JP2004067440A Method and apparatus for manufacturing optical fiber preform 审中-公开
公开(公告)号：JP2004067440A
公开(公告)日：2004-03-04
申请号：JP2002228434
申请日：2002-08-06
申请人： Hitachi Cable Ltd , 日立電線株式会社
发明人： KOBASHI TETSUYA , MATSUZAKI KENSHO , NAITO MASAHARU , KAWASE KENJI , IKEDA YUICHI , SHIRAI YUSUKE
IPC分类号： C03B37/018 , C03B37/014
CPC分类号： C03B37/01486 , C03B2207/70
摘要： PROBLEM TO BE SOLVED: To provide a method and an apparatus for manufacturing an optical fiber preform in which the monitoring work for the falling-down of soot and the stripping off of a surface during the formation of the soot is automated and the improvement of the operation efficiency due to unmanned operation and improvement of the safety are attained.
SOLUTION: In the method and the apparatus for manufacturing the optical fiber preform by rotating a starting member 1 composed of a glass rod supported by a chuck part around the center axis as a rotation axis and blowing a glass fine particle with flame 6 on the outer circumference of the starting member 1 along the center axis, the weight of the produced optical fiber preform is measured by a weight measuring means 10 and 11 connected to the chuck part and when the weight is smaller than the set value, it is judged that the produced optical fiber preform falls down and at least the blowing of the flame 6 is stopped.
COPYRIGHT: (C)2004,JPO

3. 发明专利

JP2003277095A Method for sintering optical fiber porous preform 审中-公开
标题翻译：烧结光纤多孔预制件的方法
公开(公告)号：JP2003277095A
公开(公告)日：2003-10-02
申请号：JP2002086447
申请日：2002-03-26
申请人： Hitachi Cable Ltd , 日立電線株式会社
发明人： IKEDA YUICHI , KAWASE KENJI , SHIRAI YUSUKE
IPC分类号： G02B6/00 , C03B37/014
摘要： PROBLEM TO BE SOLVED: To provide a method for sintering an optical fiber porous preform by which a long optical fiber porous preform can be vitrified while suppressing foaming. SOLUTION: In the method for sintering an optical fiber porous preform 1 to vitrify by inserting the preform 1 into a heating furnace 3, the temperature in the heating furnace 3 is increased while a part of the optical fiber porous preform 1 is inserted into the furnace 3, and when the temperature reaches the lowest temperature required to vitrify the preform, the temperature of the heating furnace 3 is further increased while the optical fiber porous preform 1 is moved in the inserting direction. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种用于烧结光纤多孔预型体的方法，通过该方法可以在抑制发泡的同时使长光纤多孔预成型件被玻璃化。解决方案：在通过将预成型体1插入加热炉3中来烧结光纤多孔预型体1进行玻璃化的方法中，加热炉3中的温度增加，同时一部分光纤多孔预型体1被插入进入炉3，并且当温度达到玻璃化预成型坯所需的最低温度时，加热炉3的温度进一步增加，同时使光纤多孔预型体1沿插入方向移动。版权所有（C）2004，JPO

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