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公开(公告)号：US20170320768A1
公开(公告)日：2017-11-09
申请号：US15497316
申请日：2017-04-26
申请人： HERAEUS TENEVO LLC
发明人： Qiulin MA , Kai Huei CHANG , Evan P. GREEN
IPC分类号： C03B37/025
CPC分类号： C03B37/025 , C03B37/01225 , C03B2205/13 , Y02P40/57
摘要： Method of producing glass components and preforms for use in the method. The preform includes a primary rod having a constant outside diameter and a square bottom and a sacrificial tip having a first end attached to the bottom of the primary rod, a second end opposite the first end, and a hollow interior region extending from the first end to the second end. The sacrificial tip is circular in cross section and the first end of the sacrificial tip has an outside diameter equal to the outside diameter of the primary rod. When the preform is heated in a furnace, the sacrificial tip melts and collapses into a drawing bulb which either draws the primary rod directly into the glass fiber or results in a tapered (i.e. tipped) preform for subsequent fiber draw. Material waste as well as the drip time is reduced and the cladding-to-core ratio, crucial for waveguide properties, is maintained for the whole preform compared to a square cut preform without the sacrificial tip.
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公开(公告)号：US20170084050A1
公开(公告)日：2017-03-23
申请号：US15310605
申请日：2014-06-17
申请人： HERAEUS TENEVO LLC
发明人： Qiulin MA , Evan P. GREEN , James E. BEAVERS, Jr.
CPC分类号： G06T7/62 , C03B37/02 , G01B11/08 , G01M11/30 , G01M11/37 , G01N21/896 , G01N21/952 , G01N21/958 , G06T7/0004 , G06T7/136 , G06T7/194 , H04N2005/2255
摘要： An apparatus and a method for measurement of transparent cylindrical articles during their manufacture in high temperature furnaces having openings for viewing the articles as they pass through the furnace. The cylindrical articles may, for example, be optical fiber preforms which have at least two layers of vitreous material and from which optical fibers are made. Measurement is accomplished using a digital camera with a sensing and digital recording device and a lens, and a processor programmed with an algorithm which analyzes the images recorded by the sensing and digital recording device by eliminating noise, identifying and locating the outer edges of the transparent cylindrical article and calculating measurements of the article including the diameter and the axial center of the article.
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公开(公告)号：US20170362113A1
公开(公告)日：2017-12-21
申请号：US15543103
申请日：2015-01-15
申请人： HERAEUS TENEVO LLC
发明人： Jong-Won Lee , Qiulin Ma , Kai Huei Chang
CPC分类号： C03B33/06 , C03B33/105 , C03B37/01225 , C03B37/01228 , C03B37/01466 , C03B37/01861 , Y02P40/57
摘要： A method of forming a glass preform of predetermined length comprises providing a length of glass material to be separated to form a preform length and a remaining length; forming a notch in the glass material; inducing a tensile stress in excess of the tensile strength of the glass in an area adjacent to the notch; and separating the preform length from the remaining length at the notch.
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公开(公告)号：US20180072608A1
公开(公告)日：2018-03-15
申请号：US15563266
申请日：2015-06-02
发明人： Alexander RUDL , Timothy D. Jenkins
IPC分类号： C03B37/012 , C03B37/027
CPC分类号： C03B37/01222 , C03B37/01211 , C03B37/01245 , C03B37/01248 , C03B37/0126 , C03B37/02754
摘要： Methods for producing glass components and obtainted glass component, e.g. optical fiber preform. A method includes providing a cladding tube (110) with a longitudinal axis including a first and a second bore separated by a chamfered region (114); inserting a spacer (120) into the first bore; inserting a rod (130) into the first bore (116); moving the spacer (120) into the chamfered section (114), causing the spacer (120) to rotate within the chamfered region (114); and rotating the cladding tube (110) into a vertical orientation, whereby the spacer (120) is prevented from entering the second bore (118) and supports the rod (130). Each portion of the chamfered region has a height perpendicular to the longitudinal axis greater than the height of the second bore. The spacer has a length parallel to the longitudinal axis greater than the height of the second bore but less the distance between the deepest point of the bottom of the chamfered region and an intersection of the top of the chamfered region and the first bore.
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5.发明申请公开(公告)号：US20140174134A1
公开(公告)日：2014-06-26
申请号：US13726906
申请日：2012-12-26
发明人： Georges Levon FATTAL , Oliver GANZ , Kai CHANG
IPC分类号： C03B37/012
CPC分类号： C03B37/01211 , C03B37/01245 , C03B37/01248 , Y02P40/57
摘要： A method of manufacturing an optical fiber preform or an optical fiber is provided. The method includes the steps of: (a) providing a glass tube and a glass core rod; (b) inserting the glass core rod into the glass tube to form an assembled body; (c) heating the assembled body to cause the glass tube to collapse on and adhere to the glass core rod; and (d) treating an interface gap between the glass core rod and the glass tube during heating of at least a portion of the assembled body. Treating of the interface gap involves: (i) establishing a vacuum pressure in the interface gap, (ii) increasing a pressure of the interface gap by a treatment gas through the interface gap for a predetermined time, and (iii) re-establishing a vacuum pressure in the interface gap after the predetermined time has elapsed.
摘要翻译： 提供一种制造光纤预制棒或光纤的方法。 该方法包括以下步骤：（a）提供玻璃管和玻璃芯棒; （b）将玻璃芯棒插入玻璃管中以形成组装体; （c）加热组装体以使玻璃管塌陷并附着在玻璃芯棒上; 和（d）在加热组装体的至少一部分期间处理玻璃芯棒和玻璃管之间的界面间隙。 处理界面间隙包括：（i）在界面间隙中建立真空压力，（ii）通过处理气体通过界面间隙增加界面间隙的压力达预定时间，以及（iii）重建 经过预定时间之后界面间隙中的真空压力。
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公开(公告)号：US20180145752A1
公开(公告)日：2018-05-24
申请号：US15813669
申请日：2017-11-15
申请人： HERAEUS TENEVO LLC
IPC分类号： H04B10/2507 , G02B6/02 , G01B11/25 , G01B11/08
CPC分类号： H04B10/2507 , C03B37/01245 , C03B37/01248 , C03B37/0126 , G01B11/08 , G01B11/25 , G01N21/412 , G02B6/02 , G06T7/60 , Y02P40/57
摘要： An apparatus and related process for producing large glass preforms with minimal clad to-core waveguide distortion from a glass body having a weight, an outer surface, core rods, and a cladding surrounding and separated from the core rods by a gap. The apparatus includes collars affixed to the top and bottom of the cladding; a spacer upon which the core rods rest; a first unit holding and supporting both the bottom collar and the spacer; a second unit holding and supporting the top collar; and a frame defining a heating zone having a heating element to heat the glass body. The weight of the glass body above and below the molten glass in the heating zone is supported by the first and second units without contacting the outer surface of the glass body.
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公开(公告)号：US20170234769A1
公开(公告)日：2017-08-17
申请号：US15502705
申请日：2014-08-08
申请人： Heraeus Tenevo LLC
发明人： Ivan RASNIK
CPC分类号： G01M11/37 , G01B11/08 , G01B11/24 , G01B11/25 , G01N21/412 , G01N21/95 , G01N21/958 , G01N2021/9511 , G06T7/60
摘要： Methods and apparatus for evaluating the geometric properties of optical fiber preforms, which methods include: providing an optical fiber preform having a longitudinal axis, an outer diameter and a circumference; providing a two-dimensional pattern having a length parallel to the longitudinal axis of the preform and a width greater than the outer diameter of the preform; providing an image capturing device disposed such that the preform is aligned between the pattern and the image capturing device; rotating the preform about its longitudinal axis and acquiring a first plurality of images of the pattern viewed through the preform at at least two different points along the circumference of the preform; and determining at least one geometric property of the preform from the first plurality of images.
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公开(公告)号：US20180002215A1
公开(公告)日：2018-01-04
申请号：US15542199
申请日：2015-01-22
IPC分类号： C03B23/045 , C03B37/012 , C03B23/047 , C03B37/025
摘要： Apparatus and method for producing elongated glass components with low bow. The apparatus may include a heating element to heat a bulk glass component where a strand may be drawn from the bulk glass component in a downward direction and a gripper device including a clamping element to support the strand while pulling or drawing it from the bulk glass component in a linear motion, and a low-friction mounting element attached to the clamping element which allows translational movement of the clamping element in an x-y plane. The gripper device may further be used to reduce bow in the strand while it is being drawn by moving the clamping element on the mounting element in a direction opposite the direction of any measured transverse acceleration.
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公开(公告)号：US20170254733A1
公开(公告)日：2017-09-07
申请号：US15517045
申请日：2014-10-14
申请人： HERAEUS TENEVO LLC
IPC分类号： G01N11/06 , C03B37/012 , G01N11/08
CPC分类号： G01N11/06 , C03B23/047 , C03B23/0473 , C03B37/0124 , C03B37/01242 , C03B2205/40 , G01N11/00 , G01N11/02 , G01N11/04 , G01N11/08 , G01N2011/006
摘要： Methods for preform and tube draw based on controlling forming zone viscosity determined by calculating a holding force exerted by the glass component in the forming zone on the strand being drawn below. The holding force may be calculated by determining a gravitational force applied to the strand and a pulling force applied to the strand by a pulling device, where the holding force is equal to the opposite of the algebraic sum of the gravitational and pulling forces. The holding force may also be calculated by measuring a stress-induced birefringence in the strand at a point between the forming zone and the pulling device, determining an amount of force applied to the strand at the point corresponding to the birefringence, and calculating the holding force by correcting the amount of force for a gravitational effect of the weight of the strand between the forming zone and the point.
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公开(公告)号：US20170240455A1
公开(公告)日：2017-08-24
申请号：US15503029
申请日：2014-08-13
申请人： Heraeus Tenevo LLC
发明人： Kai CHANG , Georges Levon FATTAL , Qiulin MA
IPC分类号： C03B37/027 , C03B23/207 , C03B37/012
CPC分类号： C03B37/02736 , C03B23/207 , C03B37/01205 , C03B37/0124 , C03B37/0126 , C03B37/01486 , Y02P40/57
摘要： A method of producing a quartz glass optical component is provided. The method includes providing a cylindrical quartz glass body made of core rod glass and cladding glass. The quartz glass body has a square cut first end having a first outer diameter. The method further includes providing a glass handle having a first end and an opposing square cut second end having a second outer diameter which is between 50% and 110% of the first outer diameter; attaching the square cut end of the glass handle to that of the quartz glass body; and using the glass handle to guide the quartz glass body through a draw furnace. A distortion in a clad-to-core ratio proximate the interface of the cylindrical quartz glass body and the glass handle is less than 5%.
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