JPH0624996B2 - Optical fiber base material automatic drawing device - Google Patents
Optical fiber base material automatic drawing deviceInfo
- Publication number
- JPH0624996B2 JPH0624996B2 JP13630485A JP13630485A JPH0624996B2 JP H0624996 B2 JPH0624996 B2 JP H0624996B2 JP 13630485 A JP13630485 A JP 13630485A JP 13630485 A JP13630485 A JP 13630485A JP H0624996 B2 JPH0624996 B2 JP H0624996B2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- fiber preform
- outer diameter
- stretching
- axial direction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
- C03B37/0124—Means for reducing the diameter of rods or tubes by drawing, e.g. for preform draw-down
- C03B37/01242—Controlling or regulating the down-draw process
Description
【発明の詳細な説明】 （イ）産業上の利用分野 本発明は、光ファイバ母材の自動延伸装置に関する。TECHNICAL FIELD The present invention relates to an automatic drawing apparatus for optical fiber preforms.
（ロ）従来技術とその問題点 光ファイバ母材は、外径を均一化したり、あるいは、石
英パイプ内に挿入したりするために、光ファイバ母材を
引き伸ばして細径化することが必要となる。特に、光フ
ァイバ母材の外径が不均一であると、それが光ファイバ
の寸法精度に影響を与える。つまり、光ファイバ母材の
外径を予め均一にしておかないと、製品化された光ファ
イバの伝送特性が悪化するなどの不具合を生じる。(B) Conventional technology and its problems In order to make the outer diameter of the optical fiber preform uniform or to insert it into a quartz pipe, it is necessary to stretch the optical fiber preform to reduce its diameter. Become. In particular, if the outer diameter of the optical fiber preform is uneven, it affects the dimensional accuracy of the optical fiber. In other words, unless the outer diameter of the optical fiber preform is made uniform in advance, problems such as deterioration of the transmission characteristics of the manufactured optical fiber occur.
このため、従来は回転引張手段で光ファイバ母材全体を
回転しつつその軸線方向に沿って張力を加える一方、光
ファイバ母材の引張方向に沿ってバーナ等の加熱手段を
移動させながらその一部を加熱して光ファイバ母材を引
き伸ばすようにしている。しかしながら、従来の光ファ
イバ母材の引き伸ばしは、主として人手によって行なわ
れているため、手間と熟練を要し、非常に作業能率が悪
いばかりでなく、一定した品質のものが得られないとい
う不具合がある。For this reason, conventionally, while rotating the entire optical fiber preform by the rotary tensioning means while applying tension along the axial direction of the optical fiber preform, while moving the heating means such as a burner along the tensioning direction of the optical fiber preform, The optical fiber preform is stretched by heating the part. However, since the conventional stretching of the optical fiber preform is mainly performed manually, it requires labor and skill, and not only is the work efficiency extremely low, but also a problem that a constant quality cannot be obtained. is there.
かかる不具合を解消するため、光ファイバ母材の外径を
外径測定器で測定し、その測定結果から光ファイバ母材
の引張速度を制御する装置が提案されている（たとえ
ば、特開昭５６−４５８４３号および特開昭５６−９２
３１号参照）。しかしながら、従来のものは、光ファイ
バ母材の引き伸ばし途中、もしくは引き伸ばし後の外径
を測定するものであって、引き伸ばし前後の外径差が考
慮されていない。すなわち、一定外径に引き伸ばそうと
しても、引き伸ばし前の外径が不均一であると、単に引
き伸ばし部分を加熱するだけではその加熱部分の単位体
積当たりに与える熱量が異なってくる。その結果、加熱
部分の温度が変動し、局部的なくびれや径大部が発生す
る。つまり、従来技術では、くびれや径大部の発生を防
止する点で未だ不十分である。In order to solve such a problem, an apparatus has been proposed in which the outer diameter of an optical fiber preform is measured by an outer diameter measuring instrument and the pulling speed of the optical fiber preform is controlled based on the measurement result (for example, JP-A-56). -45843 and JP-A-56-92.
(See No. 31). However, the conventional method measures the outer diameter of the optical fiber preform during or after stretching, and does not consider the difference in outer diameter before and after stretching. That is, if the outer diameter before stretching is non-uniform even if it is stretched to a constant outer diameter, the amount of heat given per unit volume of the heated portion will differ if the stretched portion is simply heated. As a result, the temperature of the heated portion fluctuates, and local constrictions and large diameter portions occur. In other words, the conventional technique is still insufficient in terms of preventing the occurrence of constriction and large-diameter portion.
本発明は、このような事情に鑑みてなされたものであっ
て、引き伸ばし前の光ファイバ母材の外径が大きく変動
している場合であっても、引き伸ばし部分は常に一定の
軟化温度に保持されるようにして、くびれ発生等を未然
に防止し、均一な引き伸ばしができるようにすることを
目的とする。The present invention has been made in view of such circumstances, and even when the outer diameter of the optical fiber preform before being stretched is largely changed, the stretched portion is always kept at a constant softening temperature. Thus, the purpose of the present invention is to prevent the occurrence of necking and the like and to make uniform stretching.
（ハ）問題点を解決するための手段 本発明は、上記の目的を達成するために、光ファイバ母
材全体を回転しつつその軸線方向に沿って張力を加える
回転引張手段と、前記光ファイバ母材の軸線方向に沿っ
て移動しつつその一部を加熱する加熱手段とを有する自
動延伸装置において、光ファイバ母材の引き伸ばし前後
の外径をそれぞれ測定する第１、第２外径測定器を前記
光ファイバ母材の軸線方向に沿って移動可能に設けると
ともに、これらの第１外径測定器の測定値に基づいて前
記加熱手段の熱量および加熱手段の光ファイバ母材に対
する送り速度の少なくとも一つ制御するとともに前記第
２外径測定器の測定値に基づいて前記回転引張手段の引
張速度を制御する制御部を備えて自動延伸装置を構成し
ている。(C) Means for Solving the Problems In order to achieve the above-mentioned object, the present invention relates to a rotating tensioning means for rotating the entire optical fiber preform and applying tension along the axial direction thereof, and the optical fiber. In an automatic drawing apparatus having a heating means for heating a part of the base material while moving along the axial direction, first and second outer diameter measuring devices for measuring the outer diameter of the optical fiber base material before and after stretching Is movably provided along the axial direction of the optical fiber preform, and at least the amount of heat of the heating means and the feed rate of the heating means with respect to the optical fiber preform are based on the measurement values of the first outer diameter measuring device. The automatic stretching device is configured to include a control unit that controls one and controls the pulling speed of the rotary pulling means based on the measurement value of the second outer diameter measuring device.
（ニ）作用 本発明では、光ファイバ母材の引き伸ばし時に光ファイ
バ母材の引き伸ばし前後の外径をそれぞれ測定する第
１、第２外径測定器で測定し、制御部において、第１、
第２外径測定器で測定した外径値と延伸前の光ファイバ
母材の外径の基準値Ｄ1との偏差に基づき、前記加熱手
段の熱量および加熱手段の光ファイバ母材に対する送り
速度の少なくとも一つを制御し、第２外径測定器の外径
測定値と延伸途中または直後の外径基準値との偏差に基
づき前記回転引張手段の引張速度を制御する。このた
め、引き伸ばし途中の光ファイバ母材には、単位体積当
たり常に一定の熱量を与えることができる。したがっ
て、引き伸ばし部分の軟化温度の変動が無くなり、引き
伸ばし部分の定常状態が維持される。このため、局部的
なくびれ等が発生しない。(D) Operation In the present invention, when the optical fiber preform is stretched, the outer diameters of the optical fiber preform before and after the stretching are measured by the first and second outer diameter measuring devices, respectively.
Based on the deviation between the outer diameter value measured by the second outer diameter measuring instrument and the reference value D 1 of the outer diameter of the optical fiber preform before drawing, the heat quantity of the heating means and the feed rate of the heating means to the optical fiber preform. At least one of them is controlled, and the pulling speed of the rotary tensioning means is controlled based on the deviation between the outer diameter measured value of the second outer diameter measuring device and the outer diameter reference value during or immediately after the stretching. For this reason, a constant amount of heat can be applied to the optical fiber preform in the process of being drawn per unit volume. Therefore, the fluctuation of the softening temperature of the stretched portion is eliminated, and the steady state of the stretched portion is maintained. Therefore, no local constriction occurs.
（ホ）実施例 以下、本発明を図面に示す実施例に基づいて詳細に説明
する。(E) Example Hereinafter, the present invention will be described in detail based on an example shown in the drawings.
図は、本発明の実施例に係る自動延伸装置の構成図であ
る。同図において、１は自動延伸装置全体を示し、２は
光ファイバ母材、４は光ファイバ母材２全体を回転しつ
つその軸線方向に沿って張力を加える回転引張手段であ
る。この回転引張手段４は、対向配置された固定主軸台
６と移動主軸台８とを備えるとともに、両主軸台６、８
にはそれぞれ光ファイバ母材２を把持して同期回転する
回転チャック１０、１２が設けられ、さらに上記移動主
軸台８には、該移動主軸台８を図中右方向に移動させる
ねじ軸１４が設けられ、該ねじ軸１４の軸端に主軸台駆
動用モータ１６が取り付けられて構成されている。The figure is a block diagram of an automatic stretching apparatus according to an embodiment of the present invention. In the figure, 1 is the whole automatic drawing apparatus, 2 is the optical fiber preform, and 4 is rotary tension means for applying tension along the axial direction while rotating the whole optical fiber preform 2. The rotary pulling means 4 includes a fixed headstock 6 and a moving headstock 8 which are arranged opposite to each other, and both headstocks 6, 8 are provided.
Are respectively provided with rotary chucks 10 and 12 that hold the optical fiber preform 2 and rotate synchronously. Further, the moving headstock 8 has a screw shaft 14 for moving the moving headstock 8 to the right in the drawing. A headstock drive motor 16 is attached to the shaft end of the screw shaft 14.
１８a、１８b、２０a、２０bは光ファイバ母材２の引き
伸ばし前後の外径を測定する各一対の第１、第２外径測
定器であり、本例では、共にレーザ外径測定器が適用さ
れる。そして、各一対の外径測定器１８a、１８b、２０
a、２０bは、互いに所定の距離を保ち、かつ、光ファイ
バ母材６が引き伸ばされる方向に直行して対向配置され
ている。Reference numerals 18a, 18b, 20a, and 20b denote a pair of first and second outer diameter measuring instruments for measuring the outer diameter of the optical fiber preform 2 before and after stretching. In this example, both laser outer diameter measuring instruments are applied. It Then, each pair of outer diameter measuring devices 18a, 18b, 20
The a and 20b are arranged so as to face each other in a direction in which the optical fiber preform 6 is stretched while keeping a predetermined distance from each other.
また、２２は光ファイバ母材２の軸線方向に沿って移動
しつつその一部を加熱する加熱手段としてのバーナ、２
３はバーナ２２に燃焼ガスを供給するガス供給装置であ
る。Reference numeral 22 denotes a burner as a heating means for heating a part of the optical fiber preform 2 while moving along the axial direction of the preform 2.
Reference numeral 3 is a gas supply device for supplying combustion gas to the burner 22.
そして、上記外径測定器１８a、１８b、２０a、２０bと
バーナ２２とは一つの支持台２４に固定され、該支持台
２４には、支持台２４を図中左右方向に移動させるねじ
軸２６が設けられ、該ねじ軸２６の軸端に支持台駆動用
モータ２８が取り付けられている。The outer diameter measuring devices 18a, 18b, 20a, 20b and the burner 22 are fixed to one support base 24, and the support base 24 has a screw shaft 26 for moving the support base 24 in the left-right direction in the drawing. A support base driving motor 28 is attached to the shaft end of the screw shaft 26.
３０は第１、第２外径測定器１８a、１８b、２０a、２
０bで測定した値とそれぞれに対応する、光ファイバ母
材２の引き伸ばし前後の外径の基準値との各偏差に基づ
いてそれぞれバーナ２２の熱量およびバーナ２２の光フ
ァイバ母材２に対する速度の少なくとも一つを制御する
とともに前記回転引張手段４の引張速度を制御する制御
部である。30 is the first and second outer diameter measuring devices 18a, 18b, 20a, 2
0b and at least the speed of the burner 22 with respect to the optical fiber preform 2 based on each deviation between the value measured at 0b and the corresponding reference value of the outer diameter before and after the stretching of the optical fiber preform 2. It is a control unit that controls one and controls the pulling speed of the rotary pulling means 4.
光ファイバ母材２を均一に引き伸ばす場合の自動延伸装
置１の動作について説明する。The operation of the automatic stretching device 1 when the optical fiber preform 2 is stretched uniformly will be described.
まず、光ファイバ母材２の両端を固定主軸台６と移動主
軸台８の各回転チャック１０、１２で把持し、該回転チ
ャック１０、１２を光ファイバ母材２とともに回転す
る。この状態で、バーナ２２を点火し、光ファイバ母材
２の一部を加熱する。これにより、光ファイバ母材２
は、バーナ２２で加熱された部分が順次局部的に引き伸
ばされるので、引き伸ばし前の光ファイバ母材２の外径
d1を第１外径測定器１８a、１８bで、引き伸ばし後の外
径d2を第２外径測定器２０a、２０bでそれぞれ測定す
る。これらの測定値は、制御部３０に送出される。First, both ends of the optical fiber preform 2 are held by the rotary chucks 10 and 12 of the fixed headstock 6 and the moving headstock 8, respectively, and the rotary chucks 10 and 12 are rotated together with the optical fiber preform 2. In this state, the burner 22 is ignited to heat a part of the optical fiber preform 2. Thereby, the optical fiber preform 2
Since the portion heated by the burner 22 is sequentially stretched locally, the outer diameter of the optical fiber preform 2 before stretching is
d 1 is measured by the first outer diameter measuring devices 18a and 18b, and the outer diameter d 2 after stretching is measured by the second outer diameter measuring devices 20a and 20b. These measured values are sent to the control unit 30.
制御部３０は、入力された測定した値から光ファイバ母
材２の引き伸ばし前後の外径差Δ(＝d1−d2)を求めこの
外径差Δに基づく制御信号を前記回転引張手段２の主軸
台駆動用モータ１６、ガス供給装置２３および支持台駆
動用モータ２８にそれぞれ与える。これにより、回転引
張手段４の引張速度、バーナ２２の火力およびバーナ２
２の光ファイバ母材２の軸線方向の送り速度が制御され
る。すなわち、移動主軸台８を主軸台駆動用モータ１６
によって右方向に第２外径測定器２０a、２０bで測定し
た外径d2と基準値Ｄ2との偏差な基づいて制御された速
度で移動させて光ファイバ母材２に張力を加える一方、
支持台２４をバーナ２２とともに左方向(矢印a方向)に
第１外径測定器１８a、１８bで測定した外径d1と基準値
Ｄ1との偏差に基づいて制御された送り速度で移動させ
る。The control unit 30 obtains an outer diameter difference Δ (= d 1 −d 2 ) before and after stretching the optical fiber preform 2 from the input measured value, and outputs a control signal based on the outer diameter difference Δ to the rotary tensioning means 2 To the headstock drive motor 16, the gas supply device 23, and the support base drive motor 28. Thereby, the pulling speed of the rotary pulling means 4, the heating power of the burner 22 and the burner 2
The feed rate of the second optical fiber preform 2 in the axial direction is controlled. That is, the moving headstock 8 is moved to the headstock drive motor 16
While adding a second outer diameter measuring device 20a, the outer diameter d 2 and the reference value tension moved to the optical fiber preform 2 at a controlled speed deviation of the basis in the D 2 as measured by 20b in the right direction by,
The support base 24 is moved to the left (in the direction of arrow a) together with the burner 22 at a feed speed controlled based on the deviation between the outer diameter d 1 measured by the first outer diameter measuring devices 18a and 18b and the reference value D 1 . .
この場合、上記偏差△2に基づき回転引張手段４の引張
速度を常に制御する。一方、上記偏差△1に基づき、バ
ーナ２２の火力およびバーナ２２の送り速度の双方を同
時に制御する他、情況に応じてこれらの内の一つのみを
制御していもよい。In this case, the pulling speed of the rotary pulling means 4 is constantly controlled based on the deviation Δ 2 . On the other hand, based on the deviation Δ 1 , both the heating power of the burner 22 and the feed speed of the burner 22 may be controlled simultaneously, or only one of them may be controlled depending on the situation.
上記の説明は、光ファイバ母材２が移動主軸台８に近い
部分から固定主軸台６側に向かって順次引き伸ばさてい
く場合であるが、逆に、光ファイバ母材２が固定主軸台
６に近い部分から移動主軸台８側に向かって順次引き伸
ばしていく場合には、バーナ１６を移動主軸台８と同じ
右方向(矢印b方向)に移動させるとともに、引き伸ばし
前の光ファイバ母材２の外径d1を第２外径測定器２０
a、２０bで、引き伸ばし後の外径d2を第１外径測定器１
８a、１８bでそれぞれ測定する。勿論、第１、第２の各
外径測定器の位置を入れ換えることも可能である。その
他の動作は前記と同様である。なお、上記の要領で支持
台１８を往復移動させ、光ファイバ母材６を延伸するこ
とも可能である。The above description is for the case where the optical fiber preform 2 is gradually extended from the portion close to the moving headstock 8 toward the fixed headstock 6, but conversely, the optical fiber preform 2 becomes the fixed headstock 6. When sequentially extending from the near portion toward the moving headstock 8 side, the burner 16 is moved in the same right direction (arrow b direction) as the moving headstock 8 and the outside of the optical fiber preform 2 before being drawn. The diameter d 1 is measured by the second outer diameter measuring device 20.
a and 20b, the outer diameter d 2 after stretching is measured by the first outer diameter measuring device 1
8a and 18b are measured respectively. Of course, the positions of the first and second outer diameter measuring devices can be interchanged. Other operations are similar to the above. It is also possible to extend the optical fiber preform 6 by moving the support base 18 back and forth in the above manner.
表は、移動主軸台８の引張速度、バーナ２２の火力およ
びバーナ22の送り速度を共に制御して光ファイバ母材の
外径を調整した場合の実験結果である。なお、引き伸ば
し前後の光ファイバ母材の外径の基準値はそれぞれ、１
６mmφ、12mmφ(光ファイバ母材の延伸直後の外径に対
する値)を目 標値とした。The table shows the experimental results when the outer diameter of the optical fiber preform is adjusted by controlling the pulling speed of the moving headstock 8, the burning power of the burner 22 and the feed speed of the burner 22 together. The standard value of the outer diameter of the optical fiber preform before and after drawing is 1
6mmφ, 12mmφ (value for the outer diameter of the optical fiber preform immediately after drawing) The standard value was used.
この実験結果から明らかなように、引き伸ばし前の元の
光ファイバ母材の外径のばらつきが大きいにもかかわら
ず、引き伸ばし後の外径は均一であり、局部的なくびれ
発生を未然に防止して母材を延伸することができる。As is clear from the results of this experiment, despite the large variation in the outer diameter of the original optical fiber preform before stretching, the outer diameter after stretching is uniform, and local constriction is prevented in advance. The base material can be stretched.
なお、この実施例では、光ファイバ母材２の引き伸ばし
前後の外径を測定するため、一対の外径測定器を２組設
けているが、これに限定されるものではなく、さらに多
数設けてもよく、これに加えて引き伸ばし途中の外径測
定用のものを設置してもよい。In this embodiment, two sets of a pair of outer diameter measuring devices are provided in order to measure the outer diameter of the optical fiber preform 2 before and after being stretched, but the number is not limited to this, and a larger number may be provided. In addition to this, a device for measuring the outer diameter during stretching may be installed.
（ヘ）効果 以上のように、本発明によれば、光ファイバ母材の引き
伸ばし時に光ファイバ母材の引き伸ばし前後の外径をそ
れぞれ第１、第２外径測定器で測定し、制御部におい
て、これらの測定値と予めセットした引き伸ばし前後の
基準値との偏差を求めこの偏差に基づいて加熱手段の熱
量あるいは加熱手段の光ファイバ母材に対する送り速度
の少なくとも一つおよび回転引張手段の引張速度を制御
するので、引き伸ばし部分には、単位体積当たり常に一
定の熱量を与えることができるようになり、引き伸ばし
部分の軟化温度の変動が無くなる。その結果、光ファイ
バ母材の引き伸ばし時のくびれ等の発生を未然に防止で
き、引き伸ばし後の外径の均一化を図ることができるよ
うになる等の優れた効果が発揮される。(F) Effect As described above, according to the present invention, when the optical fiber preform is stretched, the outer diameters of the optical fiber preform before and after the stretching are measured by the first and second outer diameter measuring devices, respectively, and the control unit , The deviation between these measured values and the preset reference value before and after stretching is calculated, and based on this deviation, at least one of the heat quantity of the heating means or the feeding speed of the heating means to the optical fiber preform and the pulling speed of the rotary tensioning means. Is controlled, it is possible to always apply a constant amount of heat to the stretched portion, and the softening temperature of the stretched portion does not fluctuate. As a result, it is possible to prevent the occurrence of constrictions and the like when the optical fiber preform is stretched, and it is possible to achieve a uniform outer diameter after stretching, which is an excellent effect.
図面は本発明の実施例に係る自動延伸装置の構成図であ
る。 １……自動延伸装置、２……光ファイバ母材、４……回
転引張手段、１８a、１８b……第１外径測定器、２０
a、２０b……第２外径測定器、２２……加熱手段(バー
ナ)、３０……制御部。The drawing is a block diagram of an automatic stretching apparatus according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 ... Automatic stretching device, 2 ... Optical fiber preform, 4 ... Rotation pulling means, 18a, 18b ... 1st outer diameter measuring device, 20
a, 20b ... second outer diameter measuring device, 22 ... heating means (burner), 30 ... control section.
フロントページの続き (72)発明者 石倉 昌幸 兵庫県尼崎市東向島西之町８番地 大日日 本電線株式会社内 (56)参考文献 特開 昭56−9231（ＪＰ，Ａ) 特開 昭56−45843（ＪＰ，Ａ) 特開 昭59−213637（ＪＰ，Ａ)Front page continuation (72) Masayuki Ishikura Inventor Masayuki Ishikura 8 Nishinomachi, Higashimukaijima, Amagasaki City, Hyogo Dainichi Nippon Electric Cable Co., Ltd. (56) Reference JP 56-9231 (JP, A) JP 56- 45843 (JP, A) JP 59-213637 (JP, A)
Claims (1)
方向に沿って張力を加える回転引張手段と、前記光ファ
イバ母材の軸線方向に沿って移動しつつその一部を加熱
する加熱手段とを有する自動延伸装置において、光ファ
イバ母材の引き伸ばし前後の外径をそれぞれ測定する第
１、第２外径測定器を前記光ファイバ母材の軸線方向に
沿って移動可能に設けるとともに、これらの第１外径測
定器の測定値に基づいて前記加熱手段の熱量および加熱
手段の光ファイバ母材に対する送り速度の少なくとも一
つを制御するとともに前記第２外径測定器の測定値に基
づいて前記回転引張手段の引張速度を制御する制御部を
備えることを特徴とする光ファイバ母材の自動延伸装
置。1. A rotating tensioning means for applying tension along the axial direction of the entire optical fiber preform while rotating it, and a heating means for heating a part of the optical fiber preform while moving along the axial direction of the optical fiber preform. In an automatic drawing apparatus having and, the first and second outer diameter measuring devices for respectively measuring the outer diameter of the optical fiber preform before and after stretching are provided movably along the axial direction of the optical fiber preform, and Controlling at least one of the amount of heat of the heating means and the feed rate of the heating means with respect to the optical fiber preform based on the measurement value of the second outer diameter measurement device An automatic drawing apparatus for an optical fiber preform, comprising a control unit for controlling a pulling speed of the rotary pulling means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13630485A JPH0624996B2 (en) | 1985-06-21 | 1985-06-21 | Optical fiber base material automatic drawing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13630485A JPH0624996B2 (en) | 1985-06-21 | 1985-06-21 | Optical fiber base material automatic drawing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61295252A JPS61295252A (en) | 1986-12-26 |
| JPH0624996B2 true JPH0624996B2 (en) | 1994-04-06 |
Family
ID=15172059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13630485A Expired - Lifetime JPH0624996B2 (en) | 1985-06-21 | 1985-06-21 | Optical fiber base material automatic drawing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0624996B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014019773A1 (en) | 2014-12-17 | 2016-06-23 | Elmos Semiconductor Aktiengesellschaft | Apparatus and method for distinguishing solid objects, cooking fumes and smoke by means of the display of a mobile telephone |
| DE102014019172A1 (en) | 2014-12-17 | 2016-06-23 | Elmos Semiconductor Aktiengesellschaft | Apparatus and method for distinguishing solid objects, cooking fumes and smoke with a compensating optical measuring system |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69739984D1 (en) * | 1996-12-09 | 2010-10-21 | Shinetsu Chemical Co | A method and apparatus for making a glass preform for optical fibers by drawing a preform |
| JP3777746B2 (en) | 1997-09-26 | 2006-05-24 | 住友電気工業株式会社 | Drawing method of glass base material |
| EP0999189B1 (en) * | 1998-11-05 | 2005-03-30 | Shin-Etsu Chemical Co., Ltd. | Process and apparatus for drawing a preform and for drawing an optical fibre from the drawn preform |
| CN100551855C (en) * | 2002-07-30 | 2009-10-21 | 普雷斯曼电缆及系统能源有限公司 | The treating processes and the equipment that are used for the stretching optical fiber prefabricated rods |
| JP2004244261A (en) | 2003-02-13 | 2004-09-02 | Sumitomo Electric Ind Ltd | Method for drawing glass preform |
| CN105776840A (en) * | 2016-05-06 | 2016-07-20 | 藤仓烽火光电材料科技有限公司 | Optical fiber perform outer diameter stabilizing device and method based on electric controller |
-
1985
- 1985-06-21 JP JP13630485A patent/JPH0624996B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014019773A1 (en) | 2014-12-17 | 2016-06-23 | Elmos Semiconductor Aktiengesellschaft | Apparatus and method for distinguishing solid objects, cooking fumes and smoke by means of the display of a mobile telephone |
| DE102014019172A1 (en) | 2014-12-17 | 2016-06-23 | Elmos Semiconductor Aktiengesellschaft | Apparatus and method for distinguishing solid objects, cooking fumes and smoke with a compensating optical measuring system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61295252A (en) | 1986-12-26 |
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