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公开(公告)号：US20200369553A1
公开(公告)日：2020-11-26
申请号：US16767956
申请日：2018-12-20
Applicant: HERAEUS QUARTZ NORTH AMERICA LLC
Inventor： Carl W. Ponader
IPC: C03B37/029
Abstract: A variable seal for shielding from contaminants both an object to be heated in, and the heating element of, a high-temperature furnace. The seal has a first support ring and a second support ring separated by a distance. One or more components control the distance between the two support rings. A high-temperature fabric cylinder is attached to the support rings, is located where the object enters or exits the furnace, and surrounds at least a portion of the object. A mechanism engages the approximate center of the fabric cylinder to close the fabric cylinder as the one or more components decrease the distance between the two support rings and to open the fabric cylinder as the one or more components increase the distance between the two support rings, whereby the fabric cylinder continuously contacts the circumference of the object regardless of the diameter of the object.
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2.发明申请公开(公告)号：US20200231488A1
公开(公告)日：2020-07-23
申请号：US16746180
申请日：2020-01-17
Inventor： Oliver Ganz , Kenneth Robert Koch , Tim Alan Pontsler
IPC: C03B23/207
Abstract: An apparatus and related process for producing a high-strength weld between two glass components. Chucks clamp and move respective first ends of the glass components toward each other inside an enclosure, where the second ends are heated, softened, and welded together in a weld zone. The enclosure has layers of stacked quartz glass bricks and allows the weld zone to cool slowly and avoid stress. A propane quartz melting torch directs a flame inside the enclosure and toward the second ends as the glass components move toward each other. The flame softens the second ends and creates substantially smooth polished surfaces in the weld zone having an increased hydroxide content. At least 80% of the weld zone has a hydroxide content greater than about 10 ppm average in a 10 μm depth from the surface and the tensile strength of the weld zone is above about 10 MPa.
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公开(公告)号：US11811453B2
公开(公告)日：2023-11-07
申请号：US17824477
申请日：2022-05-25
Applicant: Heraeus Quartz North America LLC
Inventor： Qiulin Ma , Kai Huei Chang , Evan P. Green , James E. Beavers, Jr. , Carl W. Ponader
IPC: C03B37/012 , H04B10/2507 , G01B11/08 , G01B11/25 , G02B6/02 , G01N21/41 , G06T7/60
CPC classification number: H04B10/2507 , C03B37/0126 , C03B37/01211 , C03B37/01245 , C03B37/01248 , G01B11/08 , G01B11/25 , G02B6/02 , G01N21/412 , G06T7/60 , Y02P40/57
Abstract: An apparatus 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：US11788927B2
公开(公告)日：2023-10-17
申请号：US17186907
申请日：2021-02-26
Applicant: Heraeus Quartz North America LLC
Inventor： Maximilian Schmitt
CPC classification number: G01M11/0228 , G01M11/30
Abstract: A method for determining the refractive index profile of a preform when the RIP is not substantially step-index like. (a) The preform deflection function is measured and transformed into a measured RIP. (b) A RI level and radius are assumed for the preform layer being evaluated and a compensation level RIP is calculated. (c) A theoretical deflection function is generated corresponding to the assumed RI level and radius and the generated data are transformed into a fitting RIP. (d) The fitting RIP is compared to the measured RIP and the comparison is evaluated against a predetermined accuracy level for the preform layer being evaluated. (e) Steps (b) and (c) are repeated iteratively until the predetermined accuracy level has been achieved. Steps (b) through (e) are repeated for each preform layer that needs to be compensated. Finally, a measurement artifact compensated refractive index profile is calculated for the preform.
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公开(公告)号：US11434163B2
公开(公告)日：2022-09-06
申请号：US16767956
申请日：2018-12-20
Applicant: HERAEUS QUARTZ NORTH AMERICA LLC
Inventor： Carl W. Ponader
IPC: C03B37/029
Abstract: A variable seal for shielding from contaminants both an object to be heated in, and the heating element of, a high-temperature furnace. The seal has a first support ring and a second support ring separated by a distance. One or more components control the distance between the two support rings. A high-temperature fabric cylinder is attached to the support rings, is located where the object enters or exits the furnace, and surrounds at least a portion of the object. A mechanism engages the approximate center of the fabric cylinder to close the fabric cylinder as the one or more components decrease the distance between the two support rings and to open the fabric cylinder as the one or more components increase the distance between the two support rings, whereby the fabric cylinder continuously contacts the circumference of the object regardless of the diameter of the object.
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Patent Agency Ranking
公开(公告)号：US10464837B2
公开(公告)日：2019-11-05
申请号：US15563266
申请日：2015-06-02
Inventor： Alexander Rudl , Timothy D. Jenkins
IPC: C03B37/012 , C03B37/027
Abstract: 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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7.发明授权公开(公告)号：US11739019B2
公开(公告)日：2023-08-29
申请号：US16746180
申请日：2020-01-17
Inventor： Oliver Ganz , Kenneth Robert Koch , Tim Alan Pontsler
IPC: C03B23/207
CPC classification number: C03B23/207
Abstract: An apparatus and related process for producing a high-strength weld between two glass components. Chucks clamp and move respective first ends of the glass components toward each other inside an enclosure, where the second ends are heated, softened, and welded together in a weld zone. The enclosure has layers of stacked quartz glass bricks and allows the weld zone to cool slowly and avoid stress. A propane quartz melting torch directs a flame inside the enclosure and toward the second ends as the glass components move toward each other. The flame softens the second ends and creates substantially smooth polished surfaces in the weld zone having an increased hydroxide content. At least 80% of the weld zone has a hydroxide content greater than about 10 ppm average in a 10 μm depth from the surface and the tensile strength of the weld zone is above about 10 MPa.
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公开(公告)号：US11618708B2
公开(公告)日：2023-04-04
申请号：US15497316
申请日：2017-04-26
Applicant: HERAEUS QUARTZ NORTH AMERICA LLC
Inventor： Qiulin Ma , Kai Huei Chang , Evan P. Green
IPC: C03B37/025 , C03B37/012
Abstract: 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：US20210130221A1
公开(公告)日：2021-05-06
申请号：US17152518
申请日：2021-01-19
Applicant: HERAEUS QUARTZ NORTH AMERICA LLC
Inventor： Qiulin Ma , Kai Huei Chang , Evan P. Green
IPC: C03B37/025 , C03B37/012
Abstract: 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 flat bottom portion, wherein the primary rod comprises a core rod surrounded by at least one outer cladding layer; and a cylindrical sacrificial tip having a first end attached to the flat bottom portion of the primary rod, a second end opposite the first end, and a hollow interior region extending fully from the first end to the second end, wherein the sacrificial tip is circular in cross section and the first end of the sacrificial tip has a constant inside diameter and outside diameter along its entire length from the first end to the second end, and wherein the constant outside diameter is 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：US10378996B2
公开(公告)日：2019-08-13
申请号：US15502705
申请日：2014-08-08
Applicant: Heraeus Quartz North America LLC
Inventor： Ivan Rasnik
Abstract: 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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