201135296 六、發明說明： 【發明所屬之技術領域】 本發明係有關於一種與光纖之間進行光的接收和發射 之光通訊模組，尤其是有關於將光纖發出的光藉由光濾波 器來作反射並入射至受光元件的光通訊模組。 【先前技術】 於先前技術中，所週知的光通訊模組的結構爲，與光 纖之間進行光的接收和發射，並進行訊號之受送訊。光通 訊模組，係具備光纖的安裝部，並且具備對於光纖發出的 光作受光並對其進行光電轉換的受光元件、和發光並使光 入射至光纖處的發光元件。 因爲無法對於光纖之光軸而將受光元件和發光元件配 置在兩方相同位置上，因此，通常係將發光元件配置在光 纖的光軸上，並將受光元件配置成使其之光軸與光纖之光 軸相正交，再藉由在光纖的光軸上以45°角度作配置的光 濾波器，來使受光元件接收光纖發出的光。作爲此種光通 訊模組，例如係存在有專利文獻1中所列舉之模組。 專利文獻 專利文獻1:(日本）特開2005-2〇2156號公報 【發明內容】 發明所欲解決之課題 -5- 201135296 當受光元件接收光纖發出的光時，在受光元件的受光 面上會反射一部分的光。被反射的光會經由光濾波器而返 回到光纖中，並成爲通訊網路中雜訊增加的一個原因。 本發明是鑒於上述課題而提出者，其目的，係在於提 供一種能夠以簡單的結構來實現不會使在受光元件處所反 射之光返回到光纖中的光通訊模組。 爲了解決上述課題，本發明之光通訊模組，係具備有 :光纖的安裝部，該光纖進行光的發射和接收；受光元件 ，具有與安裝在該安裝部上之光纖的光軸相交之光軸；光 濾波器，使上述光纖發出的光入射到上述受光元件處；以 及本體部，具有上述安裝部並安裝有上述受光元件以及光 濾波器， 該光通訊模組，其特徵爲： 上述本體部，係具備相對於上述受光元件之光軸而具 有特定之位置關係且將該受光元件作固定的安裝基準面， 上述光濾波器，係以使上述光纖發出的光入射到上述受光 元件中的方式，而相對於上述受光元件之光軸以及光纖之 光軸來以傾斜狀作配置，並且相對於上述安裝基準面而配 置爲以上述光纖之光軸作爲旋轉中心的傾斜狀配置。 又，本發明之光通訊模組的特徵在於，上述本體部具 備對於上述受光元件的安裝基準面作調整之調整面，上述 光濾波器係相對於上述安裝基準面以及調整面而配置爲以 上述光纖之光軸作爲旋轉中心的傾斜狀配置。 進而，本發明之光通訊模組的特徵在於，上述安裝基 -6- 201135296 準面以及調整面係朝向與上述光纖的光軸相正交之方向， 上述受光兀件的光軸係與上述光纖的光軸正交。 更進而，本發明之光通訊模組的特徵在於，在上述光 濾波器和受光元件之間配置透鏡，該透鏡係使從上述光纖 發出的光耦合至上述受光元件的受光面，當將上述光濾波 器之相對上述安裝基準面而以光纖的光軸作爲旋轉中心的 傾斜角度設爲θ時，在上述光濾波器的受光點處而從與上 述安裝基準面正交的線以2Θ的角度作了傾斜之線上，配置 上述透鏡的光學中心和上述受光元件的受光面中心。 而，本發明之光通訊模組的特徵在於，在上述光纖的 光軸上配置發光元件，該發光元件發出的光係透過上述光 濾波器並入射到上述光纖中。 發明之效果 若根據本發明之光纖，則光濾波器係以使光纖發出的 光入射至受光元件處的方式而相對於受光元件的光軸以及 光纖的光軸來以傾斜狀配置，並且配置爲相對於安裝基準 面而以光纖的光軸作爲旋轉中心之傾斜狀配置，藉由此， 只要傾斜光濾波器，在受光元件的受光面上反射的光就會 向其他方向反射而不會返回到原來的方向，因此，反射光 就不會返回到光纖處，而能夠防止在光通訊網路中混入雜 訊。 又’若根據本發明之光通訊模組，則本體部係具備對 於受光元件安裝基準面作調整之調整面，並且光濾波器係 201135296 配置爲相對於安裝基準面以及調整面而以光纖的光軸作爲 旋轉中心之傾斜狀配置，藉由此，即使在具有調整面的情 況下，也能夠確實地成爲不會使反射光返回至光纖處。 進而，若根據本發明之光通訊模組，則安裝基準面以 及調整面係朝向與上述光纖之光軸相正交的方向，受光元 件之光軸係與光纖之光軸正交，藉由此，能夠構成兼顧光 學性能和小型化的光通訊模組。 更進而，若根據本發明之光通訊模組，則當光濾波器 相對於安裝基準面而以光纖的光軸作爲旋轉中心的傾斜角 度爲θ時，係在光濾波器的受光點從與安裝基準面正交的 線而以2 Θ的角度傾斜的線上，配置透鏡的光學中心和受光 元件的受光面中心，藉由此，係能夠高效率地將從光濾波 器發出的光作集光，並能夠藉由受光元件來確實地接收光 〇 而且，若根據本發明之光通訊模組，則係在光纖的光 軸上配置發光元件，發光元件發出的光係透過光濾波器並 入射至光纖處，藉由此，係能夠以簡單的結構來具有送訊 的功能。 【實施方式】 下面按照附圖詳細說明本發明的實施方式。圖1爲表 示第1實施方式之光通訊模組的槪要圖。第1實施方式之光 通訊模組係與光纖2之間進行光的發射和接收，在本體部1 內，配置接收光纖2發出之光並進行光電轉換的第1受光元 -8- 201135296 件3以及第2受光元件4、和對光纖2入射光的發光元件5。 受光元件3、4係由光電二極體所構成，發光元件5係由雷 射一極體所構成。 在本體部1內’係設有將光纖2作固定之安裝部1 4，將 光纖2配置爲使其光軸沿著圖中z軸。發光元件5係在本體 部1內以使發光部5a被配置在光纖2之光軸上的方式而被作 固定’發光部5a發出的光係直射而入射至光纖2之端面。 第1受光元件3和第2受光元件4，係被設在與本體部1 的安裝部14所被設置之面相正交的面上。亦即是，第！受 光元件3和第2受光元件4的光軸係分別沿著圖中X軸，而 且第1受光元件3係在光纖2側而以使其光軸與光纖2之光軸 相交的方式而被作配置、第2受光元件4係在發光元件5側 而以使其光軸與光纖2之光軸相交的方式而被作配置。 光纖2發出的光至少含有2個波長的光，在第1受光元 件3處接收第1波長的光，在第2受光元件4處接收第2波長 的光。又，從發光元件5係發射第3波長的光並入射至光纖 2中。 爲了分支此些複數波長之光，在本體部1內係被配置 有光濾波器6、7。第1光濾波器6，係以相對於光纖2的光 軸和第1受光元件3的光軸而均形成45°角度的方式而被作 傾斜狀配置，並具備有反射第1波長的光而使第2波長的光 以及第3波長的光透過之特性。第2光濾波器7，係以相對 於光纖2的光軸和第2受光元件4的光軸而均形成45°角度的 方式而被作傾斜狀配置，並具備有反射第2波長的光而使 201135296 第3波長的光透過之特性。 在光纖2和第1光濾波器6之間配置第1透鏡10，該第1 透鏡10係使光纖2發出的發散光變成平行光並將發光元件5 發出的光集光到光纖2上。在第1光濾波器6和第1受光元件 3之間配置第2透鏡11，並將光纖2發出的光集光到第1受光 元件3處。在第2光濾波器7和第2受光元件4之間配置第3透 鏡12，並將光纖2發出的光集光到第2受光元件4處。又， 在第2光濾波器7和發光元件5之間配置第4透鏡13，並使發 光元件5發出的發散光成爲平行光。 下面進一步詳細地說明受光元件3、4的固定》在本體 部1處，係被安裝有用以固定第1受光元件3之第1受光元件 固定部件20、和用以固定第2受光元件4之第2受光元件固 定部件2 5。 第1受光元件固定部件20係被形成爲大致圓筒形，並 且兩個端面係成爲互相平行。第1受光元件3，係具備有與 受光面3a平行且爲鍔狀之固定面部3b，該固定面部3b係抵 接並固定在安裝基準面21上，該安裝基準面21係身爲第1 受光元件固定部件20之其中一個端面。 第1受光元件固定部件20的與安裝基準面21相反側之 另一端面，係與本體部1的調整面22抵接並被一體化。本 體部1的調整面22，係形成爲面向與光纖2之光軸相垂直的 方向。當將第1受光元件3對於本體部1而進行安裝，係預 先將第1受光元件3對於第1受光元件固定部件20之安裝基 準面21而作固定，再使已固定有第1受光元件3之第1受光 10· 201135296 元件固定部件20對於本體部1的調整面22而作抵接，而將 第1受光元件3之光軸在調整面22上進行調整並作固定。 第1受光元件固定部件20的安裝基準面21，由於係與 和本體部1之調整面22作抵接的另一端面相平行，因此， 係對於第1受光元件3進行光軸調整，並且，在使第1受光 元件固定部件2〇與本體部1作了一體化的狀態下，安裝基 準面21係面向與光纖2之光軸相垂直的方向。而且，被固 定在安裝基準面21上之第1受光元件3，係被配置爲：使受 光面3a朝向與光纖2之光軸相垂直的方向，並且使其光軸 在第1光濾波器6的位置處與光纖2之光軸相交。 於此，第1光濾波器6係被配置爲在圖中Y軸方向而形 成傾斜狀。圖2表示圖1的A-A剖面圖。第1光濾波器6之接 收光纖2所發出的光之受光點6a，係位處在上下方向之中 心位置，且該受光點6a係位置在光纖2之光軸上。第1光濾 波器6，係以光纖2之光軸作爲中心，而以使接收光纖2發 出光側的面朝向斜下方的方式來作角度Θ之傾斜。 藉由使第1光濾波器6如同上述一般地傾斜，光纖2發 出的光之在Y軸方向上的相對於第1光濾波器6之入射角度 係成爲Θ、且出射角度亦成爲Θ。故而，從第1光濾波器6射 向第1受光元件3側之光L1，係成爲相對於本體部1之安裝 基準面21和調整面22的垂直線28而具有2Θ的傾斜角度。 第1光濾波器6發出的光L1所透過之第2透鏡11，其身 爲透鏡光學中心之主點，係被配置在相對於在第1光濾波 器6之受光點6a處的與本體部1之安裝基準面21相正交的垂 -11 - 201135296 直線28而以2Θ角度來作傾斜的線上，又，接收光L1的第1 受光元件3之受光面3 a，亦係配置在該線上。藉由此，能 夠將第1光濾波器6發出的光L1高效率地集光，並能夠確實 地接收光。另外，使第1光濾波器6作傾斜之角度0，係被 設定在±1.5°以下的範圍內。又，亦可將傾斜方向朝向相 反方向、亦即是將接收光纖2所發出之光之側的面朝向斜 上方傾斜。 第2受光元件4也以與第1受光元件3的相同的結構而被 固定在本體部1內。亦即是，具有安裝基準面26之第2受光 元件固定部件25，係在相對於本體部1的調整面27而進行 光軸調整之後被固定，伴隨於此，第2受光元件4的光軸係 被設定爲在第2光濾波器7之位置處而與光纖2的光軸相正 交。 第2光濾波器7也與第1光濾波器6同樣在Y軸方向上而 以光纖2的光軸爲中心，並以使接收光纖2之發出光之側的 面朝向斜下方的方式來作角度Θ之傾斜，第3透鏡12的作爲 透鏡光學中心之主點，係被配置在相對於在第2光濾波器7 之受光點處的與本體部1之安裝基準面26相正交的垂直線 而以2Θ角度來作傾斜的線上，又，第2受光元件4之受光面 4a亦係配置在該線上。另外，使第2光濾波器7傾斜的角度 Θ，亦係被設定在±1.5°以下的範圍內。 如此這般，藉由將光濾波器6、7相對於安裝基準面21 以及調整面22而配置爲以光纖2的光軸昨爲旋轉中心之傾 斜狀配置，在受光面3a、4a處所反射之光係會向別的方向 -12- 201135296 反射而不會回到原來的方向’因此，反射光係不會被返回 至光纖2處，而能夠防止在光通訊網路中混入雜訊。 另外，爲了不讓反射光回到原來的方向，亦可以考慮 使受光元件3、4之安裝角度形成爲傾斜狀，但是，在此種 情況下’係需要使安裝基準面2 1或者調整面2 2相對於光軸 成爲傾斜狀，而光軸調整係變得困難。在本實施方式中， 藉由使光濾波器6、7僅向Y軸方向傾斜，係幾乎不需要改 變先前的結構，並且亦能夠簡單地進行光軸調整。 接著’對本發明的第2實施方式進行說明。圖3爲表示 第2實施方式之光通訊模組的槪要圖。第2實施方式之光通 訊模組的結構，係大致與第1實施方式的光通訊模組相同 ’因此對共通的部分將省略說明。與第1實施方式不同的 是，在本體部1內，係並沒有設置透鏡10〜12，代替此， 係改爲使第1受光元件3具備透鏡3c、並使第2受光元件4具 備透鏡4c。故而，光纖2所發出的光係維持發散光的狀態 而被受光元件3 ' 4接收。另外，在第2光濾波器7和發光元 件5之間，係設有第4透鏡13。 在本實施方式中，在第1光濾波器6和第1受光元件3之 間，係配置只讓藉由第1受光元件3所接收之波長帶域的光 透過之第1波長分離元件15。又，在第2光濾波器7和第2受 光元件4之間，亦配置只讓藉由第2受光元件4所接收之波 長帶域的光透過之第2波長分離元件1 6。此些之波長分離 元件1 5、1 6，係作爲以多層膜所形成之帶通濾波器來構成 -13- 201135296 圖4表示圖3的A-A剖面圖。如該圖所示，在本實施方 式中，亦係使第1光濾波器6沿著Y軸形成傾斜狀。亦即是 ，第1光濾波器6，係以光纖2之光軸爲中心，而以使接收 光纖2之發出光之側的面朝向斜下方的方式來作角度Θ之傾 斜。藉由此，從第1光濾波器6朝向第1受光元件3側的光L1 ，係相對於本體部1之安裝基準面21和調整面22的垂線28 而具有2Θ的傾斜角度◊第1受光元件3之受光面3a，係被配 置在相對於在第1光濾波器6之受光點6a處的與本體部1之 安裝基準面21相正交的垂直線28而以2Θ角度來作傾斜的線 上，藉由此，亦可確實地接收光L1。又，雖然並未圖示， 但是第2光濾波器7亦係同樣地被作傾斜配置。 如此這般，即使在並不於光纖2和受光元件3、4之前 方設置準直透鏡的情況下，亦由於係將光濾波器6、7相對 於安裝基準面21以及調整面22而配置爲以光纖2的光軸作 爲旋轉中心的傾斜狀配置，並使光傾斜狀地入射至受光元 件3、4處，因此，來自受光面3a、4a的反射光係並不會回 到光纖2中，而能夠防止在光通訊網路混入雜訊。 以上，對本發明的實施方式進行了說明，但是本發明 係並不被限定於上述實施方式，在其技術思想範圍內係可 得到各種各樣的適用。例如，在第1以及第2實施方式中， 係使受光元件固定部件20、25相對於本體部1的調整面22 而一邊進行光軸調整一邊進行固定，但是，亦可與本體部 1成爲一體化，而僅相對於安裝基準面21來將受光元件3、 4作固定。在此種情況下，光濾波器6、7係成爲相對於安 -14- 201135296 裝基準面2 1而配置爲以光纖2的光軸作爲旋轉中心之傾斜 狀配置。 又，受光元件3、4之光軸的相對於光纖2之光軸的角 度，係並不被限定於垂直的角度，亦可大於90°，或者亦 可小於90。。不論如何，藉由使光濾波器6、7只沿著Y軸方 向而傾斜，能夠防止反射光之返回。 進而，在第1以及第2實施方式中’均係使光纖2發出2 種波長的光，並藉由第1受光元件3和第2受光元件4而接收 各波長的光，但是，即使只有1個受光兀件，也能夠同樣 地適用本發明。 【圖式簡單說明】 圖1爲第1實施方式之光通訊模組的槪要圖。 圖2爲圖1的A-A剖面圖。 圖3爲第2實施方式之光通訊模組的槪要圖。 圖4爲圖3的A-A剖面圖。 【主要元件符號說明】 1 :本體部 2 :光纖 3 :第1受光元件 4 :第2受光元件 5 ‘·發光元件 6 :第1光濾波器 -15- 201135296 7 :第2光濾波器 14 :安裝部 20 :第1受光元件固定部件 21 :安裝基準面 22 :調整面 25 :第2受光元件固定部件 26 :安裝基準面 27 :調整面 -16-201135296 VI. Description of the Invention: [Technical Field] The present invention relates to an optical communication module for receiving and transmitting light with an optical fiber, and more particularly to the light emitted by the optical fiber by an optical filter. An optical communication module that reflects and enters the light receiving element. [Prior Art] In the prior art, the well-known optical communication module has a structure in which light is received and transmitted with the optical fiber, and the signal is transmitted. The optical communication module includes a mounting portion for an optical fiber, and includes a light receiving element that receives and optically converts light emitted from the optical fiber, and a light emitting element that emits light and causes light to enter the optical fiber. Since the light-receiving element and the light-emitting element cannot be disposed at the same position on both sides of the optical axis of the optical fiber, the light-emitting element is usually disposed on the optical axis of the optical fiber, and the optical-receiving element is disposed such that its optical axis and optical fiber are disposed. The optical axes are orthogonal to each other, and the light-receiving element receives the light emitted from the optical fiber by an optical filter disposed at an angle of 45° on the optical axis of the optical fiber. As such an optical communication module, for example, there is a module exemplified in Patent Document 1. [Patent Document 1] (Japanese Patent Laid-Open Publication No. 2005-2〇2156) SUMMARY OF THE INVENTION PROBLEM TO BE SOLVED BY THE INVENTION - 201135296 When a light receiving element receives light emitted from an optical fiber, it will be on a light receiving surface of the light receiving element. Reflect a portion of the light. The reflected light is returned to the fiber via the optical filter and becomes a cause of increased noise in the communication network. The present invention has been made in view of the above problems, and an object thereof is to provide an optical communication module capable of returning light reflected at a light receiving element to an optical fiber with a simple configuration. In order to solve the above problems, an optical communication module according to the present invention includes: an optical fiber mounting portion that emits and receives light; and a light receiving element that has light that intersects an optical axis of an optical fiber mounted on the mounting portion. a light filter that causes light emitted from the optical fiber to enter the light receiving element; and a main body portion having the mounting portion and the light receiving element and the optical filter, wherein the optical communication module is characterized by: And a mounting reference surface having a specific positional relationship with respect to an optical axis of the light receiving element and fixing the light receiving element, wherein the optical filter is configured such that light emitted from the optical fiber is incident on the light receiving element In the meantime, the optical axis of the light-receiving element and the optical axis of the optical fiber are arranged in an inclined manner, and are disposed in an inclined shape with the optical axis of the optical fiber as a rotation center with respect to the mounting reference surface. Further, in the optical communication module of the present invention, the main body portion includes an adjustment surface for adjusting a mounting reference surface of the light receiving element, and the optical filter is disposed on the mounting reference surface and the adjustment surface. The optical axis of the optical fiber is arranged in an inclined shape as a center of rotation. Further, the optical communication module of the present invention is characterized in that the mounting base 6-201135296 and the adjustment surface are oriented in a direction orthogonal to the optical axis of the optical fiber, and the optical axis of the light receiving member and the optical fiber The optical axes are orthogonal. Furthermore, the optical communication module of the present invention is characterized in that a lens is disposed between the optical filter and the light receiving element, and the lens couples light emitted from the optical fiber to a light receiving surface of the light receiving element, and the light is emitted When the inclination angle of the filter with respect to the mounting reference plane and the optical axis of the optical fiber as the center of rotation is θ, the light receiving point of the optical filter is at an angle of 2 从 from a line orthogonal to the mounting reference plane. On the oblique line, the optical center of the lens and the center of the light receiving surface of the light receiving element are disposed. Further, the optical communication module of the present invention is characterized in that a light-emitting element is disposed on an optical axis of the optical fiber, and light emitted from the light-emitting element is transmitted through the optical filter and incident on the optical fiber. According to the optical fiber of the present invention, the optical filter is disposed in an inclined manner with respect to the optical axis of the light receiving element and the optical axis of the optical fiber so that the light emitted from the optical fiber is incident on the light receiving element, and is arranged such that The optical axis of the optical fiber is arranged obliquely with respect to the mounting reference surface as the center of rotation, whereby the light reflected on the light receiving surface of the light receiving element is reflected in the other direction without returning to the optical filter. In the original direction, therefore, the reflected light will not return to the fiber, and it can prevent noise from being mixed in the optical communication network. Further, in the optical communication module according to the present invention, the main body portion includes an adjustment surface for adjusting the reference surface of the light receiving element, and the optical filter system 201135296 is configured to light the optical fiber with respect to the mounting reference surface and the adjustment surface. The shaft is arranged in an inclined shape as a center of rotation, whereby even when the adjustment surface is provided, it is possible to surely return the reflected light to the optical fiber. Further, according to the optical communication module of the present invention, the mounting reference surface and the adjustment surface are oriented in a direction orthogonal to the optical axis of the optical fiber, and the optical axis of the light receiving element is orthogonal to the optical axis of the optical fiber. It is possible to form an optical communication module that combines optical performance and miniaturization. Further, according to the optical communication module of the present invention, when the optical filter is tilted at an angle of θ with respect to the mounting reference surface with the optical axis of the optical fiber as the center of rotation, the light receiving point of the optical filter is mounted and mounted. The optical center of the lens and the center of the light receiving surface of the light receiving element are disposed on the line inclined at an angle of 2 with the line orthogonal to the reference plane, whereby the light emitted from the optical filter can be efficiently collected. Further, the light receiving element can reliably receive the light. Further, according to the optical communication module of the present invention, the light emitting element is disposed on the optical axis of the optical fiber, and the light emitted from the light emitting element is transmitted through the optical filter and incident on the optical fiber. By this, it is possible to have a function of transmitting a message with a simple structure. [Embodiment] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Fig. 1 is a schematic view showing an optical communication module according to a first embodiment. In the optical communication module according to the first embodiment, light is transmitted and received between the optical fiber 2, and the first light receiving element that receives the light emitted from the optical fiber 2 and performs photoelectric conversion is disposed in the main body portion 1 - 201135296 The second light-receiving element 4 and the light-emitting element 5 that incident on the optical fiber 2 are light-emitting elements. The light-receiving elements 3 and 4 are composed of a photodiode, and the light-emitting element 5 is composed of a laser-pole. In the main body portion 1, a mounting portion 14 for fixing the optical fiber 2 is attached, and the optical fiber 2 is disposed such that its optical axis is along the z-axis in the drawing. The light-emitting element 5 is fixed in the main body portion 1 such that the light-emitting portion 5a is disposed on the optical axis of the optical fiber 2, and the light emitted from the light-emitting portion 5a is directly incident on the end surface of the optical fiber 2. The first light receiving element 3 and the second light receiving element 4 are provided on a surface orthogonal to the surface on which the mounting portion 14 of the main body portion 1 is provided. That is, the first! The optical axis of the light-receiving element 3 and the second light-receiving element 4 are respectively along the X-axis in the drawing, and the first light-receiving element 3 is placed on the side of the optical fiber 2 so that the optical axis thereof intersects the optical axis of the optical fiber 2 The second light-receiving element 4 is disposed on the side of the light-emitting element 5 so that the optical axis thereof intersects with the optical axis of the optical fiber 2. The light emitted from the optical fiber 2 contains at least two wavelengths of light, receives light of the first wavelength at the first light receiving element 3, and receives light of the second wavelength at the second light receiving element 4. Further, light of the third wavelength is emitted from the light-emitting element 5 and incident on the optical fiber 2. In order to branch the light of the plurality of wavelengths, optical filters 6 and 7 are disposed in the main body 1. The first optical filter 6 is disposed obliquely so as to form an angle of 45° with respect to the optical axis of the optical fiber 2 and the optical axis of the first light receiving element 3, and is provided with light reflecting the first wavelength. The characteristic of transmitting light of the second wavelength and light of the third wavelength. The second optical filter 7 is disposed obliquely so as to form an angle of 45° with respect to the optical axis of the optical fiber 2 and the optical axis of the second light receiving element 4, and is provided with light reflecting the second wavelength. The characteristic that the light of the third wavelength of 201135296 is transmitted. The first lens 10 is disposed between the optical fiber 2 and the first optical filter 6, and the first lens 10 causes the divergent light emitted from the optical fiber 2 to become parallel light and collects the light emitted from the light-emitting element 5 onto the optical fiber 2. The second lens 11 is disposed between the first optical filter 6 and the first light receiving element 3, and the light emitted from the optical fiber 2 is collected by the first light receiving element 3. The third lens 12 is disposed between the second optical filter 7 and the second light receiving element 4, and the light emitted from the optical fiber 2 is collected by the second light receiving element 4. Further, the fourth lens 13 is disposed between the second optical filter 7 and the light-emitting element 5, and the divergent light emitted from the light-emitting element 5 is made into parallel light. Hereinafter, the fixing of the light receiving elements 3 and 4 will be described in detail. In the main body portion 1, the first light receiving element fixing member 20 for fixing the first light receiving element 3 and the second light receiving element 4 are fixed. 2 Light-receiving element fixing member 2 5. The first light-receiving element fixing member 20 is formed in a substantially cylindrical shape, and the two end faces are parallel to each other. The first light-receiving element 3 includes a fixed surface portion 3b that is parallel to the light-receiving surface 3a and that is fixed to the mounting reference surface 21, and the mounting reference surface 21 is first light-receiving. One of the end faces of the component fixing member 20. The other end surface of the first light-receiving element fixing member 20 opposite to the mounting reference surface 21 is in contact with and integrated with the adjustment surface 22 of the main body portion 1. The adjustment surface 22 of the body portion 1 is formed to face a direction perpendicular to the optical axis of the optical fiber 2. When the first light receiving element 3 is attached to the main body unit 1, the first light receiving element 3 is fixed to the mounting reference surface 21 of the first light receiving element fixing member 20 in advance, and the first light receiving element 3 is fixed. The first light receiving unit 10·201135296 The element fixing member 20 abuts against the adjustment surface 22 of the main body unit 1, and adjusts and fixes the optical axis of the first light receiving element 3 on the adjustment surface 22. Since the mounting reference surface 21 of the first light receiving element fixing member 20 is parallel to the other end surface that is in contact with the adjustment surface 22 of the main body portion 1, the optical axis adjustment is performed on the first light receiving element 3, and In a state in which the first light receiving element fixing member 2A is integrated with the main body portion 1, the mounting reference surface 21 faces in a direction perpendicular to the optical axis of the optical fiber 2. Further, the first light receiving element 3 fixed to the mounting reference surface 21 is disposed such that the light receiving surface 3a faces the optical axis perpendicular to the optical axis 2, and the optical axis thereof is in the first optical filter 6. The position intersects the optical axis of the optical fiber 2. Here, the first optical filter 6 is arranged to be inclined in the Y-axis direction in the drawing. Fig. 2 is a cross-sectional view taken along line A-A of Fig. 1; The light receiving point 6a of the light emitted from the optical fiber 2 of the first optical filter 6 is located at the center position in the vertical direction, and the light receiving point 6a is positioned on the optical axis of the optical fiber 2. The first optical filter 6 is inclined at an angle Θ so that the optical axis of the optical fiber 2 is centered so that the surface on the light-emitting side of the receiving optical fiber 2 faces obliquely downward. By inclining the first optical filter 6 as described above, the incident angle of the light emitted from the optical fiber 2 with respect to the first optical filter 6 in the Y-axis direction is Θ, and the emission angle is also Θ. Therefore, the light L1 that is emitted from the first optical filter 6 toward the first light receiving element 3 side has an inclination angle of 2 Å with respect to the vertical line 28 of the mounting reference surface 21 and the adjustment surface 22 of the main body portion 1. The second lens 11 through which the light L1 emitted from the first optical filter 6 passes is the main point of the optical center of the lens, and is disposed on the body portion with respect to the light receiving point 6a of the first optical filter 6. The mounting reference surface 21 is perpendicular to the vertical -11 - 201135296 line 28 and is inclined at a 2 Θ angle, and the light receiving surface 3 a of the first light receiving element 3 that receives the light L1 is also disposed on the line. . Thereby, the light L1 emitted from the first optical filter 6 can be efficiently collected, and the light can be surely received. Further, the angle 0 at which the first optical filter 6 is tilted is set within a range of ±1.5° or less. Further, the direction in which the oblique direction is directed in the opposite direction, that is, the side on the side of the light emitted from the receiving optical fiber 2 may be inclined obliquely upward. The second light receiving element 4 is also fixed in the main body unit 1 in the same configuration as the first light receiving element 3. In other words, the second light-receiving element fixing member 25 having the mounting reference surface 26 is fixed after the optical axis adjustment with respect to the adjustment surface 27 of the main body portion 1, and accordingly, the optical axis of the second light-receiving element 4 It is set to be orthogonal to the optical axis of the optical fiber 2 at the position of the second optical filter 7. Similarly to the first optical filter 6, the second optical filter 7 is centered on the optical axis of the optical fiber 2 in the Y-axis direction, and the surface on the side where the light-emitting side of the receiving optical fiber 2 is directed obliquely downward. The inclination of the angle Θ, the principal point of the third lens 12 as the optical center of the lens is disposed perpendicular to the mounting reference surface 26 of the main body portion 1 with respect to the light receiving point of the second optical filter 7 The line is inclined at a 2 Θ angle, and the light receiving surface 4a of the second light receiving element 4 is also disposed on the line. Further, the angle Θ at which the second optical filter 7 is tilted is also set within a range of ±1.5° or less. In this manner, the optical filters 6 and 7 are disposed so as to be inclined at the center of rotation of the optical axis of the optical fiber 2 with respect to the mounting reference surface 21 and the adjustment surface 22, and are reflected at the light receiving surfaces 3a and 4a. The light system will reflect in the other direction -12-201135296 without returning to the original direction. Therefore, the reflected light system will not be returned to the optical fiber 2, and the noise can be prevented from being mixed in the optical communication network. Further, in order to prevent the reflected light from returning to the original direction, it is also conceivable to form the mounting angles of the light receiving elements 3 and 4 in an inclined shape. However, in this case, it is necessary to mount the reference surface 2 1 or the adjustment surface 2 2 is inclined with respect to the optical axis, and the optical axis adjustment system becomes difficult. In the present embodiment, by tilting the optical filters 6 and 7 only in the Y-axis direction, it is almost unnecessary to change the previous configuration, and the optical axis adjustment can be easily performed. Next, a second embodiment of the present invention will be described. Fig. 3 is a schematic view showing an optical communication module according to a second embodiment; The configuration of the optical communication module of the second embodiment is substantially the same as that of the optical communication module of the first embodiment. Therefore, the description of the common portions will be omitted. Unlike the first embodiment, the lenses 10 to 12 are not provided in the main body portion 1. Instead, the first light receiving element 3 is provided with the lens 3c and the second light receiving element 4 is provided with the lens 4c. . Therefore, the light emitted from the optical fiber 2 is maintained in the state of diverging light and is received by the light receiving element 3'4. Further, a fourth lens 13 is provided between the second optical filter 7 and the light-emitting element 5. In the present embodiment, the first wavelength separating element 15 that transmits only the light in the wavelength band received by the first light receiving element 3 is disposed between the first optical filter 6 and the first light receiving element 3. Further, between the second optical filter 7 and the second light receiving element 4, a second wavelength separating element 16 that transmits only the light of the wavelength band received by the second light receiving element 4 is disposed. The wavelength separating elements 15 and 16 are formed as band-pass filters formed of a multilayer film. -13 - 201135296 FIG. 4 is a cross-sectional view taken along line A-A of FIG. As shown in the figure, in the present embodiment, the first optical filter 6 is also formed to have an inclined shape along the Y-axis. In other words, the first optical filter 6 is inclined at an angle Θ so that the surface on the side where the light emitted from the receiving optical fiber 2 is directed obliquely is centered on the optical axis of the optical fiber 2. As a result, the light L1 from the first optical filter 6 toward the first light receiving element 3 side has an inclination angle of 2 相对 with respect to the perpendicular line 28 of the mounting reference surface 21 and the adjustment surface 22 of the main body portion 1 ◊ the first light receiving light The light receiving surface 3a of the element 3 is disposed at an angle of 2 相对 with respect to a vertical line 28 orthogonal to the mounting reference surface 21 of the main body portion 1 at the light receiving point 6a of the first optical filter 6. On the line, the light L1 can also be reliably received. Further, although not shown, the second optical filter 7 is also arranged obliquely in the same manner. In this manner, even when the collimator lens is not provided before the optical fiber 2 and the light receiving elements 3 and 4, the optical filters 6 and 7 are disposed with respect to the mounting reference surface 21 and the adjustment surface 22 as Since the optical axis of the optical fiber 2 is arranged in an inclined manner as a center of rotation, and the light is incident on the light receiving elements 3 and 4 obliquely, the reflected light from the light receiving surfaces 3a and 4a does not return to the optical fiber 2, It can prevent noise from being mixed into the optical communication network. Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various applications are possible within the scope of the technical idea. For example, in the first and second embodiments, the light-receiving element fixing members 20 and 25 are fixed while adjusting the optical axis with respect to the adjustment surface 22 of the main body unit 1. However, the light-receiving element fixing members 20 and 25 may be integrated with the main body unit 1. The light-receiving elements 3, 4 are fixed only with respect to the mounting reference surface 21. In this case, the optical filters 6 and 7 are arranged in an inclined shape with the optical axis of the optical fiber 2 as a center of rotation with respect to the reference plane 2 1 of the A-14-201135296. Further, the angle of the optical axes of the light receiving elements 3, 4 with respect to the optical axis of the optical fiber 2 is not limited to a vertical angle, and may be greater than 90 or less than 90. . In any case, by causing the optical filters 6, 7 to be inclined only in the Y-axis direction, it is possible to prevent the return of the reflected light. Further, in the first and second embodiments, the optical fibers 2 emit light of two kinds of wavelengths, and the first light receiving element 3 and the second light receiving element 4 receive light of respective wavelengths. The present invention can be equally applied to a light receiving member. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view of an optical communication module according to a first embodiment. Fig. 2 is a cross-sectional view taken along line A-A of Fig. 1; Fig. 3 is a schematic view showing an optical communication module of a second embodiment; Fig. 4 is a cross-sectional view taken along line A-A of Fig. 3; [Description of main component symbols] 1 : Main body 2 : Optical fiber 3 : First light receiving element 4 : Second light receiving element 5 ' Light emitting element 6 : First optical filter -15 - 201135296 7 : Second optical filter 14 : Mounting portion 20: First light-receiving element fixing member 21: Mounting reference surface 22: Adjustment surface 25: Second light-receiving element fixing member 26: Mounting reference surface 27: Adjustment surface-16-