1267631 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種光纖同心度檢測方法，特別是關於一種利 用光功率分析的方式直接檢測光纖同心度的檢測方法。 【先前技術】 光纖是一種利用光作為傳導媒介的線材，由於其可以避免傳 . 遞訊號時的損耗，目前已普遍用在資訊傳輸的領域上，例如網路 9 線等。 習知技藝之光纖請參照第一圖所示，本圖係為光纖之剖面示 意圖，光纖1係由一光纖蕊10、一包覆層12、一填膠區13以及 一外殼層14所組成，光纖蕊10係由包覆層12包覆，其間即可以 使光線產生全反射，使光線可以於光纖中不斷地前反射後，自一 端傳遞到另一端，而整個包覆層12係藉由一填膠區13固定於一 外殼層14之中，外殼層14通常係作為保護光纖蕊1〇用途，以避 • 免光纖蕊1〇因折彎、斷裂等而損壞。 但是，習知技藝之光纖1於製造時，可能因為製程的因素， 導致光纖蕊10並非位於光纖1的中心處，舉例而言，請參照第二 - 圖所示，若是光纖1之包覆層12在與外殼層14填膠接合時，可 能會產生光纖蕊10並非位於光纖1的中心處的狀況，此時若是此 光纖1應用於光線訊號傳遞裝置（圖中未顯示）上，例如一光線 收發器（Transceiver)上，因為與光線訊號傳遞裝置（圖中未顯示） 的同心度有偏移，故產生一光功率耗損區100,也就是說，光線有 部分因此無法承接而損耗，如第二圖所示，使光線傳遞時的光功 22804-CP-TW-050629-發明專利說明書 _D1Rd〇c (8 1267631 率耗損，這可能會使光線訊號傳遞因此不穩定，或甚至會出現 訊的問題。 【發明内容】 有鑑於此，本發明提供一種光纖同心度檢測方法，可以測試 光纖之同心度是否合於規範，以事先避免光線傳遞時的光功率耗 損問題。 基於上述構想，本發明提供一種光纖線同心度檢測方法，其 步驟包含：準備—光源’將統位於一殼體之—側，殼體之另— =具有一定位襯套，定位襯套中之靠近光源之一端夾持一導光 接著，將一待檢測之光纖插入至定位襯套中之遠離光源之一 端’光纖之另一端連接至一光功率檢測器，獲得一光功率值；以 光纖之t心軸為圓心，旋轉光纖至—特定纽後再插人至定位襯 套中之遠離辆之—端’獲得另-光功率值；以及分析該等光功 率值獲得光纖之同心度。 根據上述構想，該導光段係為一内徑與該光纖之内徑相同之 光纖殘段。 根據上述構想，該光纖插入該定位襯套中之遠離該光源之一 端時’該光纖之截面需無導光段之截面貼齊。 &根據上述構想，光纖所旋轉之特定角度係為不大於36〇度， 車乂佳者忒特疋角度係選自於下列群組：45度、90度、135度、 180度、225度、270度與315度等。 ^根據上述構想，旋轉該光纖至一特定角度之步驟可以重複實 施讀數個光功率值，作為分析該光纖之同心度的依據。 -6 - 22804-CP-TW-050629-發明專利說明書-DlF.doc 1267631 根據上述構想，分析該等光功率值之方式係用一雷達圖。 【實施方式】 為了洋細說明本發明之光纖同心度檢測方法，請同時參照第 一圖以及第三圖，其詳細步驟如下所述： 首先’準備一裝置如第三圖所示，其中該裝置係由一殼體2〇、 一光源22、一定位襯套24以及一導光段26所組成，其中，光源 22位於殼體20之一側，該定位襯套24位於該殼體2〇之另一侧， ，位襯套24中之靠近光源22之一端夾持一導光段26,導光段26 父為内徑與光纖1之内徑相同之光纖殘段，其中，導光段％ 的同心度已經事先經過檢驗已符合規範者。 接下來，將一待檢測之光纖1插入至定位襯套24中之遠離光 源22之一端，光纖1之另一端則連接至一檢測器（圖中未顯示）， J如此貝她例中所述之檢測器可以為一光功率檢測器，光源 =發出的統，經過導光段％，再由光纖丨的傳遞，光功率檢測 器可以獲得-光神值；其巾，光纖丨插人定位襯套24中之遠離 =源22之一端時，光纖1之截面需平整，且應與導光段26之平 整截面貼齊，以戦光線自兩者之接縫錢漏，而造成 降的問題。 接下來，以光纖1之中心軸18為圓心，旋轉光纖丨至_特定 角度後’再插入至定位襯套24中之遠離光源22之一端，光^ k測可以獲彳于另—光功率值；此步驟可以重複進行數次，每進 ^一次’即可以取得光纖i在此一特定角度時獻定位概套^ 時，光功率檢·所獲得的—光功率值；以此步驟為例，本案提 228〇4-CP專㈣629囔明專利說明書娜 1267631 Γ 驗的方式，光纖1在前—個步驟完成之後，可以 =㈣至45度，度、135度、⑽度、225度、27〇度與315 又^再分光辨檢卿記錄下所獲得之光功率值。 最後，刀析上述所獲得之光功率值相對於旋轉之特定角度下 的，·以獲传光纖丨之同心、度，較佳者，可崎達圖作為分析之 手&，以上述之實驗而言，可以將光纖度、#度、如度、 135度180度、225度、wo度與阳度處所分別獲得之光功率 值以特&肖度相對於光功率值的方式記錄於—雷達圖中，請參 照細圖所示，由圖可知，該光纖！於225度時所接收的光功率 明顯回於位於其他肖度時的光功率值，可見該光纖丨的先纖蕊川 於旋轉至225度之外時皆有偏離中心點的情形，但若是偏離的程 度仍能在可轉受的範圍之内，職光纖丨仍是在可贿用的範 圍内最佳狀恶則疋该光纖1無論在任何的角度狀態之下，其光 功率值應e亥皆為相同，即表示光纖1的同心度達到最佳的狀態， 以此結果，即可以判定該光纖的同心度是否滿足需求。 此外，上述係以光纖1旋轉至45度、90度、135度、180度、 225度、270度與315度處為例，最為分析該光纖}之同心度的依 據，但並不以此為限，可以依據需求，將光纖1旋轉至任一小於 360度的一特定角度處並擷取其光功率值，作為分析光纖1之同心 度的依據。 此外，上述實施例中的光功率檢測器亦可以由光亮度檢測器 來代替，經由光亮度檢測器所獲得的複數個光亮度值，亦可以透 過雷達圖的分析後，亦可以得到光纖1的同心度。 22804-CP-TW-050629-發明專利說明書 _D1Rd〇c !267631 綜上所述，本發明提供可以直接檢測光纖之同心度的方法， 不僅可以預先檢測光纖的同心度是否合於規範，以避免當光纖用 於光線訊號傳遞裝置（圖中未顯示）時，因其同心度不佳而產生 光功率耗損問題，使光線訊號傳遞因此不穩定，或甚至會出現斷 汛的狀況，同時，本發明僅應用一特定治具，配合例如光功率檢 測器，即可以進行，可見本發明亦具有簡易且低成本的功效。 以上所述僅為本發明之較佳實施例而已，上述實施例僅係用 來說明而非用赚定本發明之申請專利範圍，本發明之範嘴係由 以下之申料職騎界定。凡依本發明帽專利範圍所作之均 等變化與修飾，皆應屬本發明之涵蓋範圍。 【圖式簡單說明】 第圖為習知技藝之光纖的剖面示意圖。 第=圖為習知技藝之光纖當其光纖蕊偏移時的剖面示意圖。 苐固為本發明光纖插入定位襯套時的橫剖面示意圖。 第四圖為本發明之檢測方法之一實施例的分析結果示意圖。 【主要元件符號說明】 1 光纖 10光纖蕊 10〇光功率耗損區 12包覆層 13 填膠區 14外殼層 18 中心轴 20 殼體 22 光源 220電源供應線 24 定位襯套 26 導光段 228〇4<™050629-發明專利說明昏D1Rd〇c1267631 IX. Description of the Invention: [Technical Field] The present invention relates to a method for detecting concentricity of an optical fiber, and more particularly to a method for directly detecting the concentricity of an optical fiber by means of optical power analysis. [Prior Art] Optical fiber is a kind of wire that uses light as a conductive medium. Since it can avoid the loss of transmission, it has been widely used in the field of information transmission, such as network 9 line. Referring to the first figure, the optical fiber 1 is composed of a fiber core 10, a cladding layer 12, a filling zone 13 and an outer casing layer 14. The fiber core 10 is covered by the cladding layer 12, and the light can be totally reflected therebetween, so that the light can be continuously reflected in the fiber and then transmitted from one end to the other end, and the entire cladding layer 12 is The glue filling zone 13 is fixed in an outer casing layer 14, and the outer casing layer 14 is generally used as a protective fiber core to avoid damage to the fiber core 1 due to bending, breaking, and the like. However, when the optical fiber 1 of the prior art is manufactured, the fiber core 10 may not be located at the center of the optical fiber 1 due to process factors. For example, please refer to the second-picture, if it is the cladding of the optical fiber 1. 12 when the adhesive layer is bonded to the outer shell layer 14, the fiber core 10 may not be located at the center of the optical fiber 1. If the optical fiber 1 is applied to a light signal transmitting device (not shown), for example, a light On the transceiver, because of the offset from the concentricity of the optical signal transmission device (not shown), an optical power loss area 100 is generated, that is, a part of the light cannot be taken and is lost, such as In the second figure, the light work when transmitting light 22804-CP-TW-050629-Invention patent specification _D1Rd〇c (8 1267631 rate loss, which may make the signal transmission of the light unstable, or even appear SUMMARY OF THE INVENTION In view of the above, the present invention provides a method for detecting fiber concentricity, which can test whether the concentricity of an optical fiber is in compliance with specifications, so as to avoid optical power consumption when light is transmitted in advance. Based on the above concept, the present invention provides a fiber optic line concentricity detecting method, the steps of which include: preparing a light source 'to be located on the side of a casing, and the other of the casings has a positioning bushing, positioning lining Holding a light guide near one end of the light source, and inserting an optical fiber to be detected into one of the positioning bushings away from the light source, the other end of the optical fiber is connected to an optical power detector to obtain an optical power value; Taking the t-axis of the fiber as the center of the fiber, rotating the fiber to the specific button and then inserting it into the positioning bushing to obtain the other-optical power value; and analyzing the optical power values to obtain the concentricity of the fiber According to the above concept, the light guiding segment is an optical fiber stub having the same inner diameter and the inner diameter of the optical fiber. According to the above concept, the optical fiber is inserted into the positioning bushing away from one end of the optical source. According to the above concept, the specific angle of rotation of the fiber is not more than 36 degrees, and the angle of the rut is selected from the following groups: 45 degrees, 90 degrees. degree, 135 degrees, 180 degrees, 225 degrees, 270 degrees and 315 degrees, etc. ^ According to the above concept, the step of rotating the optical fiber to a specific angle can repeatedly perform reading optical power values as a basis for analyzing the concentricity of the optical fiber. 6 - 22804-CP-TW-050629-Invention patent specification-DlF.doc 1267631 According to the above concept, a method of analyzing the optical power values is performed by using a radar chart. [Embodiment] The fiber concentricity of the present invention is described in detail. For the detection method, please refer to the first figure and the third figure at the same time, the detailed steps are as follows: First, 'prepare a device as shown in the third figure, wherein the device is composed of a casing 2, a light source 22, a positioning The bushing 24 and a light guiding section 26 are formed, wherein the light source 22 is located on one side of the housing 20, and the positioning bushing 24 is located on the other side of the housing 2, and the light source 22 is located in the bit bushing 24. One end clamps a light guiding section 26, and the light guiding section 26 is a fiber stub having an inner diameter equal to the inner diameter of the optical fiber 1, wherein the concentricity of the light guiding section % has been previously verified to meet the specifications. Next, an optical fiber 1 to be detected is inserted into one end of the positioning bushing 24 away from the light source 22, and the other end of the optical fiber 1 is connected to a detector (not shown), J. The detector can be an optical power detector, the light source=issuing system, passing through the light guiding segment %, and then transmitted by the optical fiber ,, the optical power detector can obtain the light value; the towel, the optical fiber truss positioning lining When the sleeve 24 is far away from one end of the source 22, the cross section of the optical fiber 1 needs to be flat, and should be aligned with the flat section of the light guiding section 26, so that the light leaks from the joint between the two, causing a drop problem. Next, taking the central axis 18 of the optical fiber 1 as a center, rotating the optical fiber 丨 to a certain angle and then 'inserting into the positioning bushing 24 away from one end of the light source 22, the optical measurement can obtain the other optical power value. This step can be repeated several times, each time you get it, you can get the optical power value obtained by the optical power test when the optical fiber i is positioned at this specific angle. In this case, the method of 228〇4-CP (4) 629 专利 专利 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤Degree and 315 and then spectroscopically discerned the optical power value obtained by the prosecutor. Finally, the knife analyzes the optical power value obtained above with respect to the specific angle of rotation, and obtains the concentricity and degree of the transmission fiber ,. Preferably, the Kawasaki diagram is used as the analysis hand & In other words, the optical power values respectively obtained by the optical fiber degree, the degree, the degree, the 135 degree, the 180 degree, the 225 degree, the woth degree and the positive degree can be recorded in the manner of the sum & degree relative to the optical power value. In the radar chart, please refer to the detailed figure, as shown in the figure, the fiber! The optical power received at 225 degrees is obviously returned to the optical power value at other latitudes. It can be seen that the fiber of the fiber 丨 is deviated from the center point when rotated to 225 degrees, but if it is deviated The degree of the optical fiber can still be within the scope of the transferable, and the optical fiber is still in the range of bribes. The optical power value of the optical fiber 1 should be at any angle. All are the same, that is, the concentricity of the optical fiber 1 is in an optimal state, and as a result, it can be determined whether the concentricity of the optical fiber satisfies the demand. In addition, the above is an example in which the optical fiber 1 is rotated to 45 degrees, 90 degrees, 135 degrees, 180 degrees, 225 degrees, 270 degrees, and 315 degrees, and the basis of the concentricity of the optical fiber is analyzed, but this is not According to requirements, the optical fiber 1 can be rotated to a specific angle less than 360 degrees and its optical power value can be taken as a basis for analyzing the concentricity of the optical fiber 1. In addition, the optical power detector in the above embodiment may also be replaced by a photo-brightness detector, and the plurality of light-brightness values obtained by the photo-brightness detector may also be obtained through analysis of the radar image, and the optical fiber 1 may also be obtained. Concentricity. 22804-CP-TW-050629-Invention patent specification_D1Rd〇c !267631 In summary, the present invention provides a method for directly detecting the concentricity of an optical fiber, which can not only detect in advance whether the concentricity of the optical fiber conforms to the specification, thereby avoiding When the optical fiber is used in a light signal transmitting device (not shown), the optical power loss problem occurs due to poor concentricity, so that the light signal transmission is unstable, or even a broken condition occurs, and the present invention The application of only a specific jig, such as an optical power detector, can be performed, and it can be seen that the present invention also has an easy and low-cost effect. The above description is only the preferred embodiment of the present invention, and the above embodiments are only for the purpose of illustration and not for the purpose of the invention, and the scope of the invention is defined by the following application. Equivalent changes and modifications made to the patent scope of the present invention are intended to be within the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS The figure is a schematic cross-sectional view of an optical fiber of the prior art. Fig. = is a schematic cross-sectional view of an optical fiber of the prior art when its fiber core is offset. Tamping is a schematic cross-sectional view of the fiber inserted into the positioning bushing of the present invention. The fourth figure is a schematic diagram of the analysis result of an embodiment of the detection method of the present invention. [Main component symbol description] 1 Fiber 10 fiber core 10 〇 optical power loss zone 12 cladding layer 13 glue filling zone 14 outer shell layer 18 central axis 20 housing 22 light source 220 power supply line 24 positioning bushing 26 light guiding section 228 〇 4<TM050629-Invention patent description faint D1Rd〇c