201213911 六、發明說明： 【發明所屬之技術領域】 本發明有關光學元件以及具備該光學元件之光學裝置。 特別是’本發明有關在經採用光纖（〇ptical fibre)之光學 裝置中，為光纖與受發光元件的光學結合所用之光學元件 (optical element)以及具備該光學元件之光學裝置。 【先前技術】 近年來’作為此實現數據傳輸（data transmission) 之裝置’採用光纖之光學裝置大受瞻目。在此種光學裝置 中’將從發光元件（optical luminescent element)出射按 照所輸入（input)之數據之光。其出射光，則於光纖内傳播 並導引至受光元件，而於受光元件中再度被轉換為電子信 號。於此種光學褒置中’需要將受光元件或發光元件與光 纖按光學方式加以連接。此種受發光元件與光纖之間的連 接’係藉由所明光相互連接器（〇pticai interc〇nnect〇r) 之光學元件而進行。 在此’一般經安裝於電路基板上之受發光元件的光軸 (optical axis) ’係與電路基板的法線方向平行者。因此， 例如’使用聚光透鏡以進行光纖與受發光元件之間的光學 結合時’則需要對電路基板按垂直方式設置光纖的端部， 且於光纖與受發光元件之間配置聚光透鏡。又，光纖，不 能以高曲率撓曲（Hex)。因此，存有光學裝置的高度尺寸 增大而難於使光學裝置的高度矮化之問題。 相對於此’於下述的專利文獻1中記載的光學裝置 3 322761 201213911 中’則採用折射光學系（refracti〇n 〇ptics)，並將光纖配 置為與電路基板平行之方式藉以謀求高度之矮化。具體而 言’如第9圖所示，專利文獻1中所記載之光學裝置2〇〇 具備有連接器201。連接器201具有經一體形成之透明樹 脂製的連接器本體202。於連接器本體202上，形成有將 來自電路基板203上所設置之光電元件204的光予以受光 之凸透鏡狀的受光面202a。又，於連接器本體202上’係 以與電路基板203平行的方式形成插入有光纖205前端以 固定之光纖用有底孔202c。再者，於連接器本體202上’ 形成有為將來自光電元件204的光導引至經插入光纖用有 底孔202c之光纖205的前端部之用的反射面202b。於反 射面202b上，形成有反射膜（未圖示）。 [先前技術文獻] [專利文獻] [專利文獻1]日本專利特開2007-121973號公報 【發明内容】 [發明所欲解決之課題] 由於上述光學裝置200中採用折射光學系，故能將光 纖205按與電路基板平行方式配置。因而，可達成光學裝 置200的高度矮化。然而，在光學裝置200中，由於連接 器本體202為樹脂製，且受光面202a係形成為凸透鏡狀， 故與第9圖相異，實際情形係受光來自光電元件204的光 之受光面2〇2a與光電元件204之間的距離即增長’以致有 難於充分達成高度的矮化之問題。 4 322761 201213911 其目的在於提供 置中，為光纖與 其特徵為：能使 本發明’係鑑於此問題點所開發者， 一種光學元件，係在經採用光纖之光學裝 受發光元件的光學結合所用之光學元件， 光學裝置的高度矮化。 [用以解決課題之手段] 有關本發明之第1光學元件，係在用於具備受發光元 件與光纖之光學裝置中使受發光元件與光纖光學結合之玻 璃製之光學元件；光纖之前端部之光軸與受發光元:之光 軸垂直，該光學元件係具備：第1光入出面，面向受發光 元件；第2光入出面，面向光纖；以及光反射面，將自第 1及第2光入出面之一方入射之光反射至第丨及第2光入 出面之另一方，並且，第2光入出面，係具有正值的光學 倍率（optical p〇wer)之透鏡面部。 於有關本發明之第1光學元件中，在光纖側的第2光 入出面上形成有具有正光學倍率之透鏡面部。因此，可縮 小於受發光元件側的第1光入出面之光通量直徑。再者， 由於有關本發明之第1光學元件係玻璃製，故能增大光學 元件的折射率（refractive index)。因而’可縮短第1光 入出面與受發光元件之間的距離。因此，如採用有關本發 明之第1光學元件，則可達成光學裝置的高度矮化。 再者，於本發明中，「受發光元件」，係受光元件和發 光元件的總稱。亦即，「受發光元件」中含有「受光元件」 及「發光元件」。 於本發明中，「光纖與受發光元件的光學結合」’係指 5 322761 201213911 使從光纖所出射之光聚焦於受光元件的受光面，或使來自 發光元件的光，聚焦於光纖的端面之意。 於本發明中，「光入出面」，係「光入射面」和「光出 射面」的總稱。亦即，「光入出面」中含有「光入射面」及 「光出射面」。 有關本發明之第2光學元件，係用於使光纖與受發光 元件光學結合之玻璃製之光學元件，該光學元件係具有第 1及第2光入出面；以及光反射面，將自第1及第2光入 出面之一側入射之光反射至第1及第2光入出面之另一 侧，並且，第2光入出面係具有：具有正值的光學倍率之 透鏡面部。 如將有關本發明之第2光學元件以使第2光入出面與 光纖相對面之方式配置，則與上述有關本發之第1光學元 件同樣，可縮小於受發光元件侧的第1光入出面之光通量 直徑。又，由於有關本發明之第2光學元件亦為玻璃製， 故能增大光學元件的折射率。因而，可縮短第1光入出面 與受發光元件之間的距離。因此，如採用有關本發明之第 2光學元件，則可達成光學裝置的高度矮化。 於有關本發明之第1或第2光學元件中，透鏡面部較 佳為被形成使自透鏡面部所入射之光聚焦在第1光入出面 上的形狀。在此情形，可於光學元件的第1光入出面的正 上方配置受發光元件。換言之，可將第1光入出面與受發 光元件之間的間隙（c 1 earance)作成零。因此，如採用此種 構成的光學元件，則可更使光學裝置的高度矮化。 6 322761 201213911 於有關本發明之第1或第2光學元件中，第！ 光入出面較佳為分別具有：具有正值的光學倍率 部。在此情形，更能縮短第1光人出面部與受發光元^之 間的距離。因此，如採用此種構㈣光學元件 光學裝置的高度矮化。 更使 有關本發明之第1及第2光學元件的各自之對d射線 (Dline)之折射率（nd)，較佳為175以上。在此情形於 第1及第2光入出面的各面上，可使光大為折射。因而， 可更使第1光入出面與受發光元件之間的距離 在此，「d線」’係指波長為588nm的光線: 於有關本發明之第1或第2光學元件中，較佳 個透鏡面部係形成為陣列（array)狀。在此情形，可以！ 個光學元件即能將複數個光纖與受發光元件進/行光吉 合。 、0 於有關本發明之第i或第2光學元件中，光學 佳為復具備形成於第i及第2光人出面的各個面上之反射 抑制膜（reflex inhibition film)。在此悴犯 _ 第1及第Μ人射面之光反射率。因而，如採用有關本發 明之第1或第2光學元件，則可降低於光學裝置中之光傳 播損失（light propagation loss)。 於有關本發明之第1或第2光學元件中， 一 干7〇件車交 佳為藉由模壓而形成。在此情形，可以廉價方式製造光學 元件。又，由於光學元件稜線部或角部會成為1^(半徑 角狀，故不易於稜線部或角部發生裂紋或缺口。 二 322761 7 201213911 於有關本發明之第1或第2光學元件中，光學元件較 佳為具有以第1及第2光人出面及光反射面作為側面，而 由第2光入出面與光反射面所構成之角部係形成為去角狀 之大致二角柱狀。在此情形，由於能使光學元件的高度矮 化以及輕堇化，故如採用此種光學元件，則可更進一步達 成光學裝置的高度矮化及輕量化。又，當將此種光學元件 固定於支持器（holder)之情形，如將形成於由第2光入出 面與光反射面所構成的角部之面作為對支持器之抵接面， 則可容易實施光學元件與支持器的定位。 又’於有關本發明之第1或第2光學元件中，由第1 光入出面與光反射面所構成之角部，再佳為形成為去角 狀。在此情形，由於能更使光學元件小型化及輕量化，故 如採用此種光學元件，則可達成光學裝置的更進一步小型 化及輕量化。 於有關本發明之第1或第2光學元件中，於位於第i 及第2光入出面以及光反射面中之至少1個面的光路 (optical path)上之部分以外之部分形成有凹凸為宜。在 此種構成’如於第1及第2光入出面以及光反射面之中， 將形成有凹凸之面接著於支持器時，對除了位置於光路上 之部分以外的部分塗佈接著劑’即可抑制接著劑流入位置 於光路上之部分。又’如將與在第1及第2光入出面以及 光反射面之中的至少一個上所形成之凹凸對應之形狀的凹 凸形成於支持器上，則光學元件與支持器間的定位會變成 各易。 8 322761 201213911 有關本發明之光學裝置，係具備：受發光元件；光纖； 其前端部之光軸與受發光元件之光軸垂直；以及玻璃製之 光學元件，用以使受發光元件與光纖光學結合，光學元件 係具備：第1光入出面，面向受發光元件。第2光入出面， 面向光纖，以及光反射面，將自第1及第2光入出面之一 方入射之光反射至第1及第2光入出面之另一方，並且， 第2光入出面係具有：具有正值的光學倍率之透鏡面部。 亦即，有關本發明之光學裝置，具備有上述有關第1 或第2光學元件。因此，於有關本發明之光學裝置中，可 降低高度的尺寸。 [發明之效果] 如採用本發明，則可提供一種光學元件，係於使用光 纖之光學裝置中用於光纖與受發光元件的光學結合之光學 元件，其特徵為：能使光學裝置的高度矮化。 【實施方式】 以下，就實施本發明之最佳形態，舉第1、7、8圖中 所示光學裝置為例藉以說明。第1、7、8中所示光學裝置 僅屬於例示。有關本發明之光學裝置並不因第1、7、8圖 中所示光學裝置而有所限定。 (第1實施形態） 第1圖，係有關第1實施形態之光學裝置的示意圖。 第2圖，係於第1實施形態之光學元件的簡圖式斜視圖。 第1圖中所示光學裝置，具備有經設置於電路基板13 之發光元件11及受光元件12、以及光纖10。發光元件11 9 322761 201213911 係按照從未圖示之控制部所輸入之數據而發光之元件。發 光元件11可由例如能對電路基板13出射垂直方向的光之 平面發光式雷射等所構成。 受光元件12係受光從發光元件11所出射並介由光纖 10而傳輸之光，按所受光之光而輸出電子信號。受光元件 12可由例如無光照電流（dark current)少且能高速回應之 p-i-n型光二極體（photo diode)等所構成。 發光電子11與受光元件12,係介由光纖10而光學方 式所連接。具體而言，光纖10的一邊側的端部l〇a，係藉 由玻璃製的光學元件20a而按光學方式所連接。另一方 面，光纖10的另一邊側的端部，係藉由玻璃製的光學元件 20b而按光學方式所連接。 光學元件20a、20b，各具有使光軸折射之功能、及使 入射光對光纖10或受光元件12聚焦之功能。因此，從發 光元件11所出射之光即被折射，並聚焦於具有對發光元件 11的光軸A1形成垂直的光軸A3之光纖10後，入射於光 纖10内。從光纖10所出射之光即被折射，並聚焦於具有 對光纖10的光軸A3形成垂直的光轴A2之受光元件12的 受光面12a。 光學元件20a、及光學元件20b，係實質上具有同樣構 成者。因此，在此，在參考第1圖及第2圖之下，就光學 元件20a、20b的構成加以說明。 光學元件20a、20b，係經形成為略三角柱狀者。具體 而言，光學元件20a、20b係經形成為端面為直角二等邊三 10 322761 201213911 角形之三角柱狀者。但，本發明中，光學元件並不需要經 形成為端面為直角二等邊三角形之三角柱狀。光學元件的 形狀，祗要是第1及第2光入出面、以及光反射面係設置 為從第1及第2光入出面的一邊所入射之光能在光反射面 反射，並從第1及第2光入出面的另一邊出射之方式，則 並不特別加以限定。光學元件，可經形成為具有頂角非為 直角之三角形狀的端面之三角柱狀，亦可經形成為多角形 狀。 光學元件20a、20b的角部或稜線部，較佳為形成為R 去角狀。作成此種形狀，則難於在光線元件20a、20b的角 部或稜線部發生裂紋或缺口。角部或棱角部為經形成為R 去角狀之光學元件20a、20b，可藉由例如模壓而形成。 光學元件20a、20b，具有第1光入出面21、第2光入 出面22、以及光反射面23。第1光入出面21係與發光元 件11或受光元件12相對面者。第2光入出面22係與光纖 10的端面相對面者。 如第1圖所示，於第1及第2光入出面2卜22的各面 上，形成有反射抑制膜24、25(第2圖中，則省略反射抑 制膜24、25的描晝。）藉由該反射抑制膜24、25，而降低 於第1及第2光入出面21、22之光反射率。在此，反射抑 制膜24、25可由例如經交互層合折射率相對性高的高折射 率層，與折射率相對性低的低折射率膜之介電質層合膜 (dielectrics laminated film)構成。高折射率層可由例 如氧化鈦等形成。低折射率膜可由氧化矽等形成。 11 322761 201213911 於本實施形態中，在第1及第2光入出面2卜22之中， 於與光纖1 〇相對面之第2光入出面22係依陣列（array) 狀地形成有複數個透鏡面部22a。再者，於本實施形態中， 複數個透鏡面部22a的排列’並不限定為直線狀。本發明 中’複數個透鏡面部，亦可排列為矩陣（matrix)狀。又， 亦可於第2光入出面僅形成有一個透鏡面部。 光反射面23係形成為平面狀者。光反射面23係按從 第1及第2光入出面2卜22的一邊所入射之光能被光反射 面23所反射而從第1及第2光入出面21、22的另一邊出 射之方式所設置。詳言之，於本實施形態中，光反射面23 係按從第1及第2光入出面2卜22的一邊所入射之光能被 光反射面23全反射（total ref lection)而從第1及第2 光入出面21、22的另一邊出射之方式設置。因而，不需要 另外在光反射面23之上，設置光反射膜。因此，光學元件 20a、20b的製造很容易。 又’如設置反射膜時，有時可能因來自發光元件11 的雷射光而有導致光反射膜劣化之情形。特別是，從發光 元件11所出射之光為高輸出的雷射光的情形，則光反射膜 很容易劣化。相對於此，在本實施形態中，由於光反射面 23上未形成有光反射膜’故可抑制因光反射膜的劣化所引 起之光反射面23上之光反射率低落。 具體而言’如欲於光學元件20a、20b的光反射面上， 作成能對空氣（折射率1.0)發生全反射時，則將來自發光 元件11之光的波長在光學元件20a、20b中的折射率作為 12 322761 201213911 將光反射 η’將來自發光元件11之光的入射角作為0時， 面23設置為能符合Sin0 2 1/η之方式即可。 例如，如來自發光元件11的光的波長在光學元件 20a、20b中的折射率為1. 75時，則按0能成為約34 。 以上之方式設置光反射面即可。如來自發光元件u 的 波長在光學元件20a、20b中的折射率為1.6時，丨、 4別U Θ能 成為約38. 7°以上之方式設置光反射面23即可。 如此’於光反射面23上之全反射的臨界角（criti ^ angle) ’會隨著來自發光元件11之光的波長在光學元件 20a、20b中的折射率增高而變小。因此，如提高來自發光 元件11之光的波長在光學元件20a、20b中的折射率，i 可提升光學元件20a、20b的設計自由度（degree Μ η 、 w aesign freedom)。因而’來自發光元件ii的光的波長在光學元件 20a、20b中的折射率以較高者為宜。來自發光元件^的 光的波長在光學元件20a、20b中的折射率較佳為丨7〇以 上’更佳為1.75以上。通常，如對於d線之光學元件2〇a 20b的折射率高時，則來自發光元件u的光的波長在光级 元件20a、20b中的折射率亦會提高。因此，光學元件2〇a、 20b對於d線之折射率（nd)較佳為1.75以上，更佳為丨8〇 以上。 再者，於本實施形態中，更具體而言，光學元件2〇a、 20b對於d線之折射率為1· 806,於波長850nm下之折射率 為1. 790 ’波長l〇50nm下之折射率為1. 784，波長1310nm 下之折射率為1. 779，波長1550mn下之折射率為1. 775， 13 322761 201213911 而光反射面23係以入射角成為45。之方式設置。第1及第 2光入出面21、22的各面係以入射角成為90。之方式所設 置。 ° 透鏡面部22a係具有正光學倍率。具體而言，於本實 施形態中’透鏡面部22a係形成為凸狀，為使光折射之折 射面°更具體而言，本實施形態中，透鏡面部22a係非球 面。在此，「非球面」係指在非為球面之面之中，具有旋轉 對稱軸（rotary symmetrical axis)之面之意。 但’於本發明中’透鏡面部祗要具有正值的光學倍率 者則並不特別加以限定。例如，透鏡面部可為不具有旋轉 對稱軸之自由曲面（free curved surface)。又，透鏡面部 亦可由複數個透鏡面為經不連續方式所排列之菲涅爾透鏡 (Fresnel lens)所構成，亦可由使光繞射之繞射面 (dirrfaction surface)所構成。 〜、田处規囟部係形成為凸肤之拼射而 時，則光學元件_造會成為容易 狀之折射面 部係由繞射面或菲涅爾透鏡所構成，$於此，如透鏡面 高度。又，容易實現更高的正光學=可抑制透鏡面部的 另一方面，於第1光入出面21上，、 部。本實施形態中，第1光入出面 並未形成有透鏡® 其次，主要參考第1圖，就光風1係形成為平面狀。 明 +裝置1的動作加以說 工』Η對發光元件 光元件11將出射因應於輸入訊 輸入信號時，貝 °现的光。在此，具體而- 322761 14 201213911 發光元件11將出射輻射光（radiation rays)。 來自發光元件Π之光係從光學元件2〇a的第1光入出 面21 (光入射面）入射於光學元件2〇a，並經於光反射面23 反射後，從第2光入出面22的透鏡面部22a往光學元件 20a外出射。在此’如上所述’從發光元件丨丨所出射之光 係輻射光，而第1光入出面21係形成為平面狀。因而，在 光學元件20a内所傳播之光則將成為發散光（divergent rays)。然後，當從光學元件2〇a出射時，藉由具有正光學 倍率之透鏡面部22a而折射，並成為聚焦光（f〇cusing rays)，並聚焦（focusing)於光纖1〇的端面。 經聚焦之光則於光纖1〇内傳輸，並從端部1〇b的端面 成為發散光後出射。出射光即從光學元件2〇b的第2光入 出面22的透鏡面部22a入射，經於光反射面23被反射後， 從第1光入出面21出射。在此，本實施形態中，透鏡面部 22a係具有正光學倍率。因此’經入射於光學元件20b之 光，則成為聚焦光。然後’於經形成為平面狀之第1光入 出面再折射’並聚焦於受光元件12的受光面12a。 受光元件12將輸出因應在受光面12a所受光之光的電 子信號。由上述之過程，可從受光元件12輸出因應對發光 元件11所輸入之信號之電子信號。 如上戶斤述’於本實施形態的光學元件20a、20b中，從 第1及第2光入出面2卜22的一邊所入射之光因光反射面 23而被反射’從而折射。因而’藉由採用光學元件20a、 20b，而 <以用對於發光元件丨丨、受光元件12的光軸傾斜 15 322761 201213911 之方式配置光纖10。例如，可以光纖1〇對於發光元件u、 受光元件12的光軸垂直的方式配置光纖1〇。又，於本實 施形態的光學元件20a、20b中’在光纖丨〇側的第2光入 出面22上形成有具有正光學倍率之透鏡面部22a。因此， 可使於受光元件12或發光元件11侧的第1光入出面21 之光通量直徑縮小。再者，由於光學元件2〇a、2〇b係玻璃 製，故能提高折射率。因而，可縮短第丨光入出面21與受 光元件12或發光元件11之間的距離。結果，可使光學裝 置1的高度矮化。 以下，就此理由’再加以詳細說明。 第3圖係有關第1比較例之光學裝置的部分示意圖。 於第3圖中所示之光學裝置中’藉由不具有反射面之透鏡 103而光學結合光纖101與受光元件1〇2。因此，需要將光 纖101的端部101a配置為使其光軸能與受光元件1〇2的光 軸一致之方式。因此，將在受光元件1〇2的光轴方向排列 透鏡103、光纖101的端部101a。因而難以使光學裝置的 高度矮化。 第4圖係有關第2比較例之光學裝置的一 部分的示意圖。於第4圖中所示光學裝置中，在透鏡1〇3 之上，設置反射構件104，藉以構成折射光學系。因此， 在第4圖中所示光學裝置中，能在並非受光元件102的光 軸上之處，將光纖101的端部101a的光軸以垂直於受光元 件102的光軸之方式配置，而相對地可達成高度的矮化。 然而，由於必須將受光元件102、透鏡103以及反射構件 104排列於受光元件102的光轴方向。因此，不能充分達 16 322761 201213911 成光學裝置的高度矮化。 第5圖係有關第3比較例之光學骏置的一部分的示意 圖。於第5圖中所示光學裝置中’不使用透鏡1〇3及反射 構件104，而配置有稜鏡（prism)106。並且，於棱鏡1〇6 的光入出面106a、106b之中，在受光元件丨〇2侧的光入出 面106b上設置有具有正光學倍率之透鏡面部iQgbi。在此 種光學裝置中’由於僅在受光元件102的光軸方向配置稜 鏡106，故可使光學裝置的高度矮化。 然而，於第5圖中所示的光學裝置中，係以平面狀方 式形成光纖101侧的光入出面106a。因此，入射於透鏡1〇6 之光’即作為發散光而於稜鏡106内傳播。因而，隨著棱 鏡106内之傳播，光通量直徑會愈來愈擴大。因而，例如 如第5®中所示’會有從光人出面1G6a所人射之光的一部 分有可能不傳播至光入出面咖上之情形。若為了確實使 從光入出面106a所入射之光能傳播至光入出面1〇6a上， 則必須使稜鏡106大型化。然而，如使稜鏡1〇6大型化， 則會導致光學裝置大型化。 又，為了確實使從光入出面106a所入射之光能傳播至 光入出面106b上’如第6圖中所示，亦可考慮縮小入射於 稜鏡106的光入出面l〇6a之光的亮點直徑（sp〇t diameter) 之作法。然而，即使如此，於作為光出射面之光入出面1〇6b 上之光通量直徑仍然會增大。因此，從光入出面1〇6b至焦 點的距離會增長。因而，不能充分使鮮裝置的高度矮化。 例如，雖然增大透鏡面部1〇6Μ的光學倍率時可縮短 322761 17 201213911 從光入出面l〇6b至焦點止的距離，但透鏡面部1〇6bl與受 光元件102可此會發生位置上之干擾（interference)。 又，例如，當藉由折射面而構成透鏡面部1〇6b時，由於透 鏡面部106bl的曲率會增大，故光學元件的製作會有困 難。特別是，如欲利用模壓以製作光學元件之情形，則光 學元件的製作會更困難。 相對於此，在本實施形態中，如第丨圖中所示，透鏡 面部22a係形成於光纖1〇側的第2光入出面22上。因此， 隨著光學元件20b内之傳播而光通量直徑會變小。因而， 於受光元件12側的第1光入出面21上之光通量直徑會變 小。又，由於入射於第1光入出面21之光為聚焦光之故， 故藉由從光學元件20b出射之際的折射，焦點距離會變得 更短。特別是，於本實施形態中’由於光學元件2〇b係玻 璃製且具有高折射率，故焦點距離將成為非常短。因而， 可縮短光學元件20b的第1光入出面21、與受光元件12 的受光面12a之間的距離。同樣地，於發光元件11侧，亦 可縮短發光元件11、與光學元件20a的第1光入出面21 之間的距離。因而，可使光學裝置1的高度矮化。 再者，如本實施形態般，藉由採用具備有所謂稜鏡功 能及透鏡功能之光學元件20a、20b，而可削減光學裝置1 的部件件數。 又，於本實施形態的光學元件20a、20b中，係以陣列 狀方式而形成有複數個透鏡面部22a。因此，可以各一個 光學元件20a、20b即可將複數個光纖1〇與受光元件12、 18 322761 201213911 發光元件11光學結合。與依每個光纖而設置光學元件時比 較，能使光學裝置小型化，且容易進行光學元件的對準定 位（alignment) ° 以下，就上述實施形態的變形例加以說明。再者，於 下列說明中，將具有與上述實施形態實質上共通功能之構 件賦與共通符號，並省略其說明。 (第1變形例） 第7圖係有關第1變形例之光學裝置的一部分的示意 圖。 於本實施形態中，係以使從透鏡面部22a所入射之光 能聚焦於第1光入出面21上之方式的形狀形成透鏡面部 22a。因此，如第7圖中所示，可在光學元件20b的第1 入出面21的正下方配置受光元件12。同樣，可在光學元 件20a的第1光入出面21的正下方配置發光元件11。因 而，可更使光學裝置的高度矮化。 (第2變形例） 第8圖係有關第2變形例之光學裝置的一部分的示意 圖。 於上述實施形態中，係在第1及第2光入出面21、22 之中，就僅在光纖10侧的第2光入出面22形成有透鏡面 部22a之情形加以說明。但，本發明並不被限定於上述構 成。例如，如第8圖中所示，在光纖10侧的第2光入出面 22上形成有透鏡面部22a，同時，在受光元件12、發光元 件11侧的第1光入出面21上亦形成有具有正光學倍率之 19 322761 201213911 透鏡面部21a。於本變形例中，可再縮短第1光入出面21 與焦點之間的距離。因而，可更使光學裝置的高度矮化。 (第3變形例） 第10圖係有關第3變形例之光學裝置的示意圖。 於上述第1實施形態中，係就光學元件20a、20b的各 者係形成為以第1及第2光入出面21、22與光反射面23 作為側面之略三角柱狀之情形加以說明。但，於本發明中， 光學元件的形狀則並不特別限定於此。光學元件祗要是具 有第1及第2光入出面與光反射面，則具有任何形狀皆可。 例如，如第10圖所示，亦可為於光學元件20a、20b 的各者中，由第1光入出面21與光反射面23所構成之角 部，及第2光入出面22與光反射面23所構成之角部的各 者均形成為去角狀。 藉由將由第2光入出面22與光反射面23所構成之角 部形成為去角狀，而可縮小沿著光學元件20a、20b的y 方向之尺寸。因而，可達成更進一步的光學裝置的高度矮 化。 另一方面，藉由將由第1光入出面21與光反射面23 所構成之角部形成為去角狀，而能縮小沿著X方向的光學 裝置之尺寸。 又，藉由將角部的至少一部分形成為去角狀，而可達 成光學元件20a、20b、甚至光學裝置的輕量化。 又，藉由將各自形成於由第1光入出面21與光反射面 23所構成之角部、及由第2光入出面22與光反射面23所 20 322761 201213911 構成之角部，而對χ方向或y方向成為垂直的平面部26、 27，作為對光學元件的支持器之抵接面利用，而可使光學 元件20a、20b的定位變得容易。 再者，於本變形例中，係就於形成為去角狀之角部上 形成有平面部之例加以說明。但，形成為去角狀之角部的 表面亦可為曲面狀。 (第4變形例） 第11圖，係於第4變形例中之光學元件的簡圖式斜視 圖。第12圖，係有關第4變形例之光學裝置的一部分的簡 圖式分解斜視圖。第13圖，係有關第4變形例之光學裝置 的一部分的簡圖式側面圖。第14圖，係第13圖的XIV簡 圖箭視圖。 如第11圖中所示，於本變形例中之光學元件20c中， 在除了位置於第2光入出面22的光路上之部分以外的部分 係形成有線條的凸部22b。凸部22b係於第2光入出面22 的寬幅方向從一側端部涵蓋至另一側端而形成。 如第12圖至第14圖中所示，光學元件20c係安裝於 支持器30上。詳言之，在支持器30的抵接面30a上，形 成有對應於凸部22b的形狀之形狀的凹部30al。並且，以 使凸部22b與凹部30al嵌合之方式，使光學元件20c的第 2光入出面22與抵接面30a互相抵接。第2光入出面22 與抵接面30a之間，係在第2光入出面22之中，從位於於 光路上之部分至被凸部22b所隔開之部分所塗佈之接著劑 28所接著。 21 322761 201213911 如本變形例，藉由設置有凸部22b，而可抑制接著劑 28流入位置於光路上之部分。又，藉由凸部22b與凹部 30al，而可使光學元件20c對於支持器30之定位變成容易。 再者，於本變形例中，雖然形成有凸部22b，惟亦可 取代凸部22b、或與凸部22b —起形成凹部。即使在此種 情形，仍然可抑制接著劑28往位置於光路上之部分流動。 從更有效抑制接著劑28往位置於光路上之部分的流 動之觀點來看，較佳為設置複數個凹凸。 又，所形成之凹凸的形狀，並不特別加以限制。亦可 設置例如：橫切面梯形狀、或橫切面半圓形狀之線條的凸 部或凹部，或圓柱狀、圓錐狀、圓錐梯形狀的凸部或凹部。 又，於本變形例中，雖然就在第2光入出面22上設置 凹凸之例加以說明，惟亦可在第1光入出面或光反射面23 上設置凹凸。又，亦可在第1及第2光入出面21、22以及 光反射面23之中的2個以上的面上設置凹凸。 【圖式簡單說明】 第1圖係有關本發明之一實施形態之光學裝置的示意 圖。 第2圖係於本發明之一實施形態之光學元件的簡圖式 斜視圖。 第3圖係有關第1比較例之光學裝置的一部分的示意 圖。 第4圖係有關第2比較例之光學裝置的一部分的示意 圖。 22 322761 201213911 置的一部分的示意 置·的一部分的示意 置的一部分的示意 置的一部分的示意 第5圖係有關第3比較例之光學裝 圖。 第6圖係有關第4比較例之光學裝 圖。 第7圖係有關第1變形例之光學裝^ 圖。 第8圖係有關第2變形例之光學裝^ 圖。201213911 VI. Description of the Invention: [Technical Field] The present invention relates to an optical element and an optical device including the same. In particular, the present invention relates to an optical element for optically combining an optical fiber and a light-emitting element in an optical device using an optical fiber, and an optical device including the optical element. [Prior Art] In recent years, the optical device using the optical fiber as the device for realizing data transmission has been greatly attracting attention. In such an optical device, light emitted from the input illuminating element will be emitted from the input illuminating element. The emitted light is propagated in the optical fiber and guided to the light receiving element, and is again converted into an electronic signal in the light receiving element. In such an optical device, it is necessary to optically connect the light-receiving element or the light-emitting element to the optical fiber. The connection between the light-receiving element and the optical fiber is carried out by an optical element of a light-emitting connector (〇pticai interc〇nnect〇r). Here, the optical axis of the light-receiving element generally mounted on the circuit board is parallel to the normal direction of the circuit board. Therefore, for example, when the condensing lens is used to optically bond the optical fiber to the light-receiving element, it is necessary to vertically arrange the end portion of the optical fiber to the circuit board, and to arrange a condensing lens between the optical fiber and the light-receiving element. Also, the fiber cannot be flexed with high curvature (Hex). Therefore, there is a problem in that the height of the optical device is increased and it is difficult to make the height of the optical device dwarf. In contrast, in the optical device 3 322761 201213911 described in the following Patent Document 1, a refractive optical system is used, and the optical fiber is disposed in parallel with the circuit substrate to achieve a low height. Chemical. Specifically, as shown in Fig. 9, the optical device 2A described in Patent Document 1 is provided with a connector 201. The connector 201 has a connector body 202 made of an integrally formed transparent resin. A light receiving surface 202a having a convex lens shape for receiving light from the photovoltaic element 204 provided on the circuit board 203 is formed in the connector body 202. Further, on the connector body 202, a bottomed hole 202c for an optical fiber to which the tip end of the optical fiber 205 is inserted is fixed so as to be parallel to the circuit board 203. Further, a reflective surface 202b for guiding the light from the photovoltaic element 204 to the front end portion of the optical fiber 205 inserted through the boring hole 202c for the optical fiber is formed on the connector body 202. A reflective film (not shown) is formed on the reflective surface 202b. [PRIOR ART DOCUMENT] [Patent Document 1] Japanese Patent Laid-Open Publication No. 2007-121973. SUMMARY OF THE INVENTION [Problems to be Solved by the Invention] Since the optical device 200 employs a refractive optical system, the optical fiber can be used. 205 is arranged in parallel with the circuit substrate. Thus, the height dash of the optical device 200 can be achieved. However, in the optical device 200, since the connector body 202 is made of resin and the light-receiving surface 202a is formed in a convex lens shape, it is different from the ninth figure. Actually, the light-receiving surface of the light from the photovoltaic element 204 is received. The distance between 2a and the photovoltaic element 204 is increased, so that it is difficult to fully achieve the problem of high dwarfing. 4 322761 201213911 The purpose of the invention is to provide a centering fiber, which is characterized by the ability of the present invention to be developed in view of the problem, an optical component used in optical bonding of an optically-acceptable light-emitting component using an optical fiber. Optical components, the height of the optical device is dwarfed. [Means for Solving the Problem] The first optical element according to the present invention is an optical element made of glass for optically combining a light-receiving element and an optical fiber in an optical device including a light-receiving element and an optical fiber; The optical axis is perpendicular to the optical axis of the light-receiving element: the optical element includes a first light entrance/exit surface facing the light-receiving element, a second light entrance/exit surface facing the optical fiber, and a light-reflecting surface from the first and the second The light incident on one of the light entrance and exit surfaces is reflected to the other of the second and second light entrance and exit surfaces, and the second light entrance/exit surface is a lens surface having a positive optical magnification. In the first optical element according to the present invention, a lens surface having a positive optical power is formed on the second light entrance/exit surface on the optical fiber side. Therefore, it is possible to reduce the light flux diameter smaller than the first light entrance and exit surface on the light-emitting element side. Further, since the first optical element according to the present invention is made of glass, the refractive index of the optical element can be increased. Therefore, the distance between the first light entrance and exit surface and the light-receiving element can be shortened. Therefore, if the first optical element according to the present invention is used, the height of the optical device can be reduced. In the present invention, the "light-emitting element" is a generic term for a light-receiving element and a light-emitting element. In other words, the "light-receiving element" includes a "light-receiving element" and a "light-emitting element". In the present invention, "optical bonding of an optical fiber to a light-emitting element" means that 5 322 761 201213911 focuses light emitted from an optical fiber on a light-receiving surface of a light-receiving element, or focuses light from the light-emitting element on an end surface of the optical fiber. meaning. In the present invention, "light entrance and exit" is a general term for "light incident surface" and "light emitting surface". In other words, "light entrance and exit" includes "light incident surface" and "light exit surface". The second optical element according to the present invention is an optical element made of glass for optically coupling an optical fiber and a light-receiving element, and the optical element has first and second light entrance and exit surfaces; and a light reflecting surface, which is from the first Light incident on one side of the second light entrance/exit surface is reflected to the other side of the first and second light entrance and exit surfaces, and the second light entrance/exit surface has a lens surface having a positive optical magnification. When the second optical element according to the present invention is disposed so that the second light entrance/exit surface and the optical fiber face each other, the first optical component on the light-receiving element side can be reduced in the same manner as the first optical element according to the above-described first aspect. The luminous flux diameter of the surface. Further, since the second optical element according to the present invention is also made of glass, the refractive index of the optical element can be increased. Therefore, the distance between the first light entrance and exit surface and the light-receiving element can be shortened. Therefore, if the second optical element according to the present invention is used, the height of the optical device can be reduced. In the first or second optical element according to the present invention, it is preferable that the lens surface is formed such that light incident from the lens surface is focused on the first light entrance/exit surface. In this case, the light-receiving element can be disposed directly above the first light entrance/exit surface of the optical element. In other words, the gap (c 1 earance) between the first light entrance and exit surface and the light-receiving element can be made zero. Therefore, by using the optical element of such a configuration, the height of the optical device can be made shorter. 6 322761 201213911 In the first or second optical element relating to the present invention, the Preferably, the light entrance and exit surfaces respectively have optical magnification portions having positive values. In this case, the distance between the face of the first light person and the light-receiving element can be shortened. Therefore, the height of the optical device such as the optical element is dwarfed. Further, the refractive index (nd) of each of the first and second optical elements of the present invention for the d-ray (Dline) is preferably 175 or more. In this case, the light can be greatly refracted on each of the first and second light entrance and exit surfaces. Therefore, the distance between the first light entrance and exit surface and the light-receiving element can be further increased. Here, "d-line" means light having a wavelength of 588 nm: preferably, in the first or second optical element according to the present invention. The lens face portions are formed in an array shape. In this case, you can! The optical components can combine a plurality of optical fibers with the light-emitting components. In the i-th or second optical element according to the present invention, it is preferable to optically include a reflex inhibiting film formed on each of the surfaces of the i-th and second-light human faces. In this case, the light reflectance of the first and third person's face is _. Therefore, if the first or second optical element of the present invention is employed, the light propagation loss in the optical device can be reduced. In the first or second optical element relating to the present invention, a dry 7-piece car is preferably formed by molding. In this case, the optical element can be manufactured in an inexpensive manner. Further, since the ridge line portion or the corner portion of the optical element is 1^ (radius-angled, cracking or chipping of the ridge line portion or the corner portion is less likely to occur. 2322176 7 201213911 In the first or second optical element relating to the present invention, Preferably, the optical element has a substantially rectangular column shape in which a corner portion formed by the second light entrance surface and the light reflection surface is formed in a chamfered shape with the first and second light emitting surfaces and the light reflecting surface as side surfaces. In this case, since the height of the optical element can be made shorter and lighter, such an optical element can further achieve height reduction and weight reduction of the optical device. Further, when the optical element is fixed In the case of a holder, if the surface formed by the corner portion formed by the second light entrance and exit surface and the light reflecting surface is used as a contact surface with respect to the holder, the positioning of the optical element and the holder can be easily performed. Further, in the first or second optical element according to the present invention, the corner portion formed by the first light entrance/exit surface and the light reflecting surface is preferably formed into a chamfered shape. In this case, Miniaturization and weight reduction of optical components, Therefore, when such an optical element is used, it is possible to further reduce the size and weight of the optical device. In the first or second optical element according to the present invention, the first and second optical entrance and exit surfaces and the light reflecting surface are located. It is preferable that irregularities are formed in portions other than the portions on the optical path of at least one of the surfaces. In such a configuration, as in the first and second light entrance and exit surfaces and the light reflecting surface, irregularities are formed. When the surface is next to the holder, the application of the adhesive agent to the portion other than the portion on the optical path can suppress the portion of the adhesive inflow position on the optical path. Further, if the light is applied to the first and second light The unevenness of the shape corresponding to the unevenness formed on at least one of the exit surface and the light reflecting surface is formed on the holder, and the positioning between the optical element and the holder becomes easy. 8 322761 201213911 The optical device according to the present invention, The invention comprises: a light-emitting element; an optical fiber; an optical axis of the front end portion of which is perpendicular to an optical axis of the light-receiving element; and an optical element made of glass for optically combining the light-emitting element with the optical fiber, the optical element The first light entrance/exit surface is provided to face the light-receiving element, and the second light entrance/exit surface faces the optical fiber and the light-reflecting surface, and reflects light incident from one of the first and second light entrance and exit surfaces to the first and second light. The second light entrance/exit surface has a lens surface having a positive optical magnification. In other words, the optical device according to the present invention includes the first or second optical element described above. In the optical device according to the present invention, the height can be reduced. [Effect of the Invention] According to the present invention, an optical element can be provided for use in an optical device using an optical fiber for optical fibers and a light-emitting element. The optical element to be combined is characterized in that the height of the optical device can be shortened. [Embodiment] Hereinafter, the optical device shown in Figs. 1, 7, and 8 will be described as an example of the best mode for carrying out the invention. . The optical devices shown in Figures 1, 7, and 8 are merely illustrative. The optical device of the present invention is not limited by the optical device shown in Figures 1, 7, and 8. (First Embodiment) Fig. 1 is a schematic view showing an optical device according to a first embodiment. Fig. 2 is a schematic perspective view of the optical element of the first embodiment. The optical device shown in Fig. 1 includes a light-emitting element 11 and a light-receiving element 12 which are provided on a circuit board 13, and an optical fiber 10. Light-emitting element 11 9 322761 201213911 An element that emits light in accordance with data input from a control unit (not shown). The light-emitting element 11 can be constituted by, for example, a planar light-emitting laser that can emit light in the vertical direction to the circuit board 13. The light-receiving element 12 receives light that is emitted from the light-emitting element 11 and transmitted through the optical fiber 10, and outputs an electronic signal in accordance with the light received. The light-receiving element 12 can be constituted by, for example, a p-i-n type photo diode having a small dark current and capable of high-speed response. The light-emitting electrons 11 and the light-receiving element 12 are optically connected via the optical fiber 10. Specifically, the one end side l〇a of the optical fiber 10 is optically connected by the glass optical element 20a. On the other hand, the other end portion of the optical fiber 10 is optically connected by an optical element 20b made of glass. Each of the optical elements 20a and 20b has a function of refracting the optical axis and a function of focusing the incident light on the optical fiber 10 or the light receiving element 12. Therefore, the light emitted from the light-emitting element 11 is refracted, and is focused on the optical fiber 10 having the optical axis A3 perpendicular to the optical axis A1 of the light-emitting element 11, and then incident on the optical fiber 10. The light emitted from the optical fiber 10 is refracted and focused on the light receiving surface 12a of the light receiving element 12 having the optical axis A2 perpendicular to the optical axis A3 of the optical fiber 10. The optical element 20a and the optical element 20b have substantially the same composition. Therefore, the configuration of the optical elements 20a and 20b will be described below with reference to Figs. 1 and 2 . The optical elements 20a and 20b are formed into a slightly triangular prism shape. Specifically, the optical elements 20a and 20b are formed into a triangular prism shape having an angular end face of a right angle of three 10 322761 201213911. However, in the present invention, the optical element does not need to be formed into a triangular column shape in which the end faces are right-angled equilateral triangles. The shape of the optical element is such that the first and second light entrance and exit surfaces and the light reflecting surface are provided so that light incident from one side of the first and second light entrance and exit surfaces can be reflected on the light reflecting surface, and is reflected from the first and The manner in which the other side of the second light entrance and exit surface is emitted is not particularly limited. The optical element may be formed in a triangular column shape having an end face having a triangular shape whose apex angle is not a right angle, or may be formed into a polygonal shape. The corners or ridge portions of the optical elements 20a and 20b are preferably formed in an R-angled shape. When such a shape is formed, it is difficult to cause cracks or nicks in the corners or ridge portions of the light elements 20a and 20b. The corners or corners are optical elements 20a, 20b formed in an R-angled shape and can be formed, for example, by molding. The optical elements 20a and 20b have a first light entrance/exit surface 21, a second light entrance/exit surface 22, and a light reflecting surface 23. The first light entrance/exit surface 21 is opposed to the light-emitting element 11 or the light-receiving element 12. The second light entrance/exit surface 22 is opposed to the end surface of the optical fiber 10. As shown in Fig. 1, reflection suppression films 24 and 25 are formed on the respective surfaces of the first and second light entrance/exit surfaces 22 (in the second drawing, the reflection suppression films 24 and 25 are omitted. By the reflection suppressing films 24 and 25, the light reflectances of the first and second light entrance and exit surfaces 21 and 22 are lowered. Here, the reflection suppressing films 24 and 25 may be composed of, for example, a high refractive index layer having a relatively high refractive index cross-linking, and a dielectric laminated film of a low refractive index film having a low refractive index. . The high refractive index layer can be formed, for example, of titanium oxide or the like. The low refractive index film may be formed of yttrium oxide or the like. 11 322761 201213911 In the present embodiment, among the first and second light entrance/exit surfaces 22, a plurality of second light entrance/exit surfaces 22 opposed to the optical fibers 1 are formed in an array. Lens face portion 22a. Further, in the present embodiment, the arrangement 'the plurality of lens surface portions 22a' is not limited to a linear shape. In the present invention, the plurality of lens faces may be arranged in a matrix shape. Further, only one lens surface portion may be formed on the second light entrance/exit surface. The light reflecting surface 23 is formed in a planar shape. The light reflecting surface 23 is reflected by the light reflecting surface 23 and is incident on the other side of the first and second light entrance and exit surfaces 21 and 22, and the light incident from the side of the first and second light entrance and exit surfaces 22 is reflected by the light reflecting surface 23 . The way is set. More specifically, in the present embodiment, the light reflecting surface 23 is totally reflected by the light reflecting surface 23 by the light incident from the side of the first and second light entrance/exit surfaces 22, and is totally reflated. 1 and the other side of the second light entrance and exit surfaces 21, 22 are disposed to be emitted. Therefore, it is not necessary to additionally provide a light reflecting film on the light reflecting surface 23. Therefore, the manufacture of the optical elements 20a, 20b is easy. Further, when a reflection film is provided, there is a case where the light reflection film is deteriorated due to the laser light from the light-emitting element 11. In particular, when the light emitted from the light-emitting element 11 is a high-output laser light, the light-reflecting film is easily deteriorated. On the other hand, in the present embodiment, since the light reflection film 23 is not formed on the light reflection surface 23, it is possible to suppress the light reflectance on the light reflection surface 23 caused by the deterioration of the light reflection film from being lowered. Specifically, when the light reflecting surface of the optical elements 20a and 20b is formed to be totally reflective to air (refractive index of 1.0), the wavelength of light from the light emitting element 11 is in the optical elements 20a and 20b. The refractive index is 12 322761 201213911. When the light reflection η' takes the incident angle of the light from the light-emitting element 11 as 0, the surface 23 is set so as to conform to Sin0 2 1/η. For example, if the wavelength of light from the light-emitting element 11 is 1.75 in the optical elements 20a, 20b, it can be about 34 by 0. In the above manner, the light reflecting surface can be provided. When the refractive index of the light-emitting element u is set to 1.6 in the optical elements 20a and 20b, the light-reflecting surface 23 may be provided in a manner of about 38. 7° or more. Thus, the critical angle of total reflection on the light reflecting surface 23 becomes smaller as the refractive index of the light from the light emitting element 11 increases in the optical elements 20a and 20b. Therefore, by increasing the refractive index of the wavelength of light from the light-emitting element 11 in the optical elements 20a, 20b, i can increase the degree of freedom of design (degree Μ η, w aesign freedom) of the optical elements 20a, 20b. Therefore, the refractive index of the light from the light-emitting element ii in the optical elements 20a, 20b is preferably higher. The wavelength of the light from the light-emitting element ^ in the optical elements 20a, 20b is preferably 丨7 〇 or more and more preferably 1.75 or more. Generally, when the refractive index of the optical element 2a 20b for the d line is high, the refractive index of the light from the light-emitting element u in the light-level elements 20a, 20b is also increased. Therefore, the refractive index (nd) of the optical elements 2a, 20b with respect to the d line is preferably 1.75 or more, more preferably 丨8 〇 or more. Further, in the present embodiment, more specifically, the optical elements 2a, 20b have a refractive index of 1.806 for the d line and a refractive index of 1.790 at a wavelength of 850 nm. The refractive index is 1. 784, the refractive index at a wavelength of 1310 nm is 1.779, the refractive index at a wavelength of 1550 nm is 1.775, 13 322761 201213911 and the light reflecting surface 23 is at an incident angle of 45. The way it is set. Each of the first and second light entrance and exit surfaces 21 and 22 has an incident angle of 90. The way it is set. ° The lens face 22a has a positive optical power. Specifically, in the present embodiment, the lens surface portion 22a is formed in a convex shape, and in particular, in order to refract the light, the lens surface portion 22a is aspherical. Here, "aspherical surface" means a surface having a rotational symmetrical axis among non-spherical surfaces. However, in the present invention, the optical magnification of the lens face having a positive value is not particularly limited. For example, the lens face may be a free curved surface that does not have a rotational symmetry axis. Further, the lens surface may be constituted by a Fresnel lens in which a plurality of lens faces are arranged in a discontinuous manner, or may be formed by a dirrfaction surface on which light is diffracted. ~ When the field regulation system is formed as a projection of the skin, the optical element is formed into an easily refracting surface composed of a diffraction surface or a Fresnel lens, such as a lens surface. height. Further, it is easy to realize a higher positive optics = the lens surface portion can be suppressed, and the first light entrance surface 21 is on the other side. In the present embodiment, the lens is not formed on the first light entrance/exit surface. Next, referring mainly to Fig. 1, the light wind 1 is formed in a planar shape. The operation of the device + device 1 is described as the light-emitting element. The light-emitting element 11 emits light corresponding to the input signal. Here, specifically - 322761 14 201213911 The light-emitting element 11 will emit radiation rays. The light from the light-emitting element 入射 is incident on the optical element 2〇a from the first light entrance/exit surface 21 (light incident surface) of the optical element 2〇a, and is reflected by the light reflecting surface 23, and then passes through the second light entrance/exit surface 22 The lens surface portion 22a is emitted outside the optical element 20a. Here, the light emitted from the light-emitting element 丨丨 radiates light as described above, and the first light entrance/exit surface 21 is formed in a planar shape. Thus, the light propagating within the optical element 20a will become divergent rays. Then, when it is emitted from the optical element 2a, it is refracted by the lens surface portion 22a having a positive optical power, and becomes focused light, and is focused on the end surface of the optical fiber 1?. The focused light is transmitted through the fiber 1 and exits from the end face of the end 1〇b as divergent light. The emitted light is incident from the lens surface portion 22a of the second light entrance/exit surface 22 of the optical element 2'b, is reflected by the light reflecting surface 23, and is emitted from the first light entrance/exit surface 21. Here, in the present embodiment, the lens surface portion 22a has a positive optical power. Therefore, the light incident on the optical element 20b becomes focused light. Then, the first light entrance/exit surface formed in a planar shape is re-refracted and focused on the light receiving surface 12a of the light receiving element 12. The light receiving element 12 outputs an electronic signal corresponding to the light received by the light receiving surface 12a. By the above process, an electronic signal for responding to a signal input from the light-emitting element 11 can be output from the light-receiving element 12. In the optical elements 20a and 20b of the present embodiment, the light incident from one side of the first and second light entrance/exit surfaces 22 is reflected by the light reflecting surface 23 and is refracted. Thus by using optical elements 20a, 20b < The optical fiber 10 is disposed such that the optical axis of the light-emitting element 丨丨 and the light-receiving element 12 is inclined by 15 322761 201213911. For example, the optical fiber 1 may be disposed such that the optical axis 1 is perpendicular to the optical axis of the light-emitting element u and the light-receiving element 12. Further, in the optical elements 20a and 20b of the present embodiment, a lens surface portion 22a having a positive optical power is formed on the second light entrance/exit surface 22 on the side of the optical fiber. Therefore, the light flux diameter of the first light entrance/exit surface 21 on the light receiving element 12 or the light emitting element 11 side can be reduced. Further, since the optical elements 2a and 2b are made of glass, the refractive index can be increased. Therefore, the distance between the first light entrance/exit surface 21 and the light receiving element 12 or the light emitting element 11 can be shortened. As a result, the height of the optical device 1 can be made dwarf. Hereinafter, this reason will be described in detail. Fig. 3 is a partial schematic view showing the optical device of the first comparative example. In the optical device shown in Fig. 3, the optical fiber 101 and the light receiving element 1〇2 are optically bonded by the lens 103 having no reflecting surface. Therefore, it is necessary to arrange the end portion 101a of the optical fiber 101 such that its optical axis can coincide with the optical axis of the light receiving element 1A2. Therefore, the lens 103 and the end portion 101a of the optical fiber 101 are arranged in the optical axis direction of the light receiving element 1A2. Therefore, it is difficult to make the height of the optical device dwarf. Fig. 4 is a schematic view showing a part of the optical device of the second comparative example. In the optical device shown in Fig. 4, on the lens 1?3, a reflection member 104 is provided to constitute a refractive optical system. Therefore, in the optical device shown in Fig. 4, the optical axis of the end portion 101a of the optical fiber 101 can be disposed perpendicular to the optical axis of the light receiving element 102, without being on the optical axis of the light receiving element 102. Relatively high dwarfing can be achieved. However, since the light receiving element 102, the lens 103, and the reflection member 104 must be arranged in the optical axis direction of the light receiving element 102. Therefore, it is not possible to fully reach the height dwarf of the optical device of 16 322761 201213911. Fig. 5 is a schematic view showing a part of the optical projection of the third comparative example. In the optical device shown in Fig. 5, "prism" 106 is disposed without using lens 1〇3 and reflecting member 104. Further, among the light entrance/exit surfaces 106a and 106b of the prism 1〇6, a lens surface iQgbi having a positive optical power is provided on the light entrance/exit surface 106b on the light receiving element 丨〇2 side. In such an optical device, since the prism 106 is disposed only in the optical axis direction of the light receiving element 102, the height of the optical device can be made low. However, in the optical device shown in Fig. 5, the light entrance/exit surface 106a on the side of the optical fiber 101 is formed in a planar manner. Therefore, the light incident on the lens 1〇6 propagates as the divergent light in the crucible 106. Thus, as the prism 106 propagates within it, the luminous flux diameter will increase. Therefore, for example, as shown in the fifth edition, there is a possibility that a part of the light emitted from the light-emitting person 1G6a may not propagate to the light-in and out-out coffee. In order to surely transmit the light incident from the light entrance/exit surface 106a to the light entrance/exit surface 1〇6a, it is necessary to increase the size of the crucible 106. However, if the size of 稜鏡1〇6 is increased, the size of the optical device will increase. Further, in order to surely transmit the light energy incident from the light entrance/exit surface 106a to the light entrance/exit surface 106b, as shown in Fig. 6, it is also conceivable to reduce the light incident on the light entrance/exit surface 16a of the crucible 106. The method of sp〇t diameter. However, even in this case, the diameter of the light flux on the light entrance/exit surface 1〇6b as the light exit surface still increases. Therefore, the distance from the light entrance/exit surface 1〇6b to the focal point increases. Therefore, the height of the fresh device cannot be sufficiently dwarfed. For example, although increasing the optical magnification of the lens surface 1〇6Μ can shorten the distance from the light entrance/exit surface l〇6b to the focus stop by the 322761 17 201213911, the lens surface 1〇6b1 and the light receiving element 102 can be displaced in position. (interference). Further, for example, when the lens surface portion 1〇6b is constituted by the refracting surface, since the curvature of the lens surface portion 106b1 is increased, the production of the optical element may be difficult. In particular, in the case where molding is used to fabricate optical components, the fabrication of optical components is more difficult. On the other hand, in the present embodiment, as shown in the figure, the lens surface portion 22a is formed on the second light entrance/exit surface 22 on the side of the optical fiber 1 side. Therefore, the luminous flux diameter becomes smaller as it propagates in the optical element 20b. Therefore, the diameter of the light flux on the first light entrance/exit surface 21 on the light receiving element 12 side becomes small. Further, since the light incident on the first light entrance/exit surface 21 is the focused light, the focal length is shortened by the refraction from the exit of the optical element 20b. In particular, in the present embodiment, since the optical element 2〇b is made of glass and has a high refractive index, the focal length will be extremely short. Therefore, the distance between the first light entrance/exit surface 21 of the optical element 20b and the light receiving surface 12a of the light receiving element 12 can be shortened. Similarly, the distance between the light-emitting element 11 and the first light entrance/exit surface 21 of the optical element 20a can be shortened on the side of the light-emitting element 11. Therefore, the height of the optical device 1 can be made short. Further, as in the present embodiment, the number of components of the optical device 1 can be reduced by using the optical elements 20a and 20b having the so-called 稜鏡 function and the lens function. Further, in the optical elements 20a and 20b of the present embodiment, a plurality of lens surface portions 22a are formed in an array. Therefore, a plurality of optical fibers 1A can be optically coupled to the light-receiving elements 12, 18 322761 201213911 light-emitting elements 11 by one optical element 20a, 20b. When the optical element is provided for each optical fiber, the optical device can be miniaturized, and the alignment of the optical element can be easily performed. Hereinafter, a modification of the above embodiment will be described. In the following description, components having substantially the same functions as those of the above-described embodiments are denoted by the same reference numerals, and their description will be omitted. (First Modification) Fig. 7 is a schematic view showing a part of an optical device according to a first modification. In the present embodiment, the lens surface portion 22a is formed in such a manner that the light incident from the lens surface portion 22a is focused on the first light entrance/exit surface 21. Therefore, as shown in Fig. 7, the light receiving element 12 can be disposed directly under the first entrance/exit surface 21 of the optical element 20b. Similarly, the light-emitting element 11 can be disposed directly under the first light entrance/exit surface 21 of the optical element 20a. Therefore, the height of the optical device can be made shorter. (Second Modification) Fig. 8 is a schematic view showing a part of an optical device according to a second modification. In the above-described embodiment, the case where the lens surface portion 22a is formed only on the second light entrance/exit surface 22 on the optical fiber 10 side among the first and second light entrance/exit surfaces 21 and 22 will be described. However, the present invention is not limited to the above configuration. For example, as shown in Fig. 8, the lens surface portion 22a is formed on the second light entrance surface 22 on the optical fiber 10 side, and the first light entrance surface 21 on the light receiving element 12 and the light emitting element 11 side is also formed. 19 322761 201213911 lens face 21a with positive optical power. In the present modification, the distance between the first light entrance and exit surface 21 and the focus can be further shortened. Thus, the height of the optical device can be made even shorter. (Third Modification) Fig. 10 is a schematic view showing an optical device according to a third modification. In the above-described first embodiment, each of the optical elements 20a and 20b is formed such that the first and second light entrance and exit surfaces 21 and 22 and the light reflecting surface 23 have a slightly triangular prism shape as a side surface. However, in the present invention, the shape of the optical element is not particularly limited thereto. The optical element may have any shape as long as it has the first and second light entrance and exit surfaces and the light reflecting surface. For example, as shown in FIG. 10, the corners formed by the first light entrance/exit surface 21 and the light reflecting surface 23, and the second light entrance/exit surface 22 and light may be used in each of the optical elements 20a and 20b. Each of the corner portions formed by the reflecting surface 23 is formed in an angular shape. By forming the corner portions formed by the second light entrance/exit surface 22 and the light reflecting surface 23 to be chamfered, the size along the y direction of the optical elements 20a and 20b can be reduced. Thus, a further height dash of the optical device can be achieved. On the other hand, by forming the corner portion formed by the first light entrance/exit surface 21 and the light reflecting surface 23 to be chamfered, the size of the optical device along the X direction can be reduced. Further, by forming at least a part of the corner portion in an angular shape, it is possible to reduce the weight of the optical elements 20a, 20b and even the optical device. Further, each of the corner portions formed by the first light entrance surface 21 and the light reflecting surface 23 and the corner portion formed by the second light entrance surface 22 and the light reflecting surface 23 20 322761 201213911 are respectively The planar portions 26 and 27 which are perpendicular to the χ direction or the y direction are used as abutting surfaces for the holder of the optical element, and the positioning of the optical elements 20a and 20b can be facilitated. Further, in the present modification, an example in which a flat portion is formed on a corner portion formed in a chamfered shape will be described. However, the surface formed as a corner portion may be curved. (Fourth Modification) Fig. 11 is a schematic perspective view of an optical element in a fourth modification. Fig. 12 is a schematic exploded perspective view showing a part of an optical device according to a fourth modification. Fig. 13 is a schematic side view showing a part of an optical device according to a fourth modification. Figure 14 is a schematic view of the XIV diagram of Figure 13. As shown in Fig. 11, in the optical element 20c of the present modification, a convex portion 22b having a line is formed in a portion other than the portion on the optical path of the second light entrance/exit surface 22. The convex portion 22b is formed to cover the width direction of the second light entrance/exit surface 22 from one end to the other end. As shown in Figs. 12 to 14, the optical element 20c is mounted on the holder 30. In detail, on the abutting surface 30a of the holder 30, a concave portion 30a1 having a shape corresponding to the shape of the convex portion 22b is formed. Further, the second light entrance/exit surface 22 of the optical element 20c and the abutting surface 30a are brought into contact with each other such that the convex portion 22b and the concave portion 30al are fitted. The second light entrance/exit surface 22 and the contact surface 30a are between the second light entrance/exit surface 22, and the adhesive agent 28 is applied from a portion located on the optical path to a portion separated by the convex portion 22b. then. 21 322761 201213911 According to the present modification, by providing the convex portion 22b, it is possible to suppress the portion where the adhesive 28 flows into the optical path. Further, the positioning of the optical element 20c with respect to the holder 30 can be facilitated by the convex portion 22b and the concave portion 30al. Further, in the present modification, the convex portion 22b is formed, but the convex portion 22b may be replaced or the concave portion may be formed together with the convex portion 22b. Even in such a case, the partial flow of the adhesive 28 to the position on the optical path can be suppressed. From the viewpoint of more effectively suppressing the flow of the adhesive 28 to a portion positioned on the optical path, it is preferable to provide a plurality of irregularities. Further, the shape of the unevenness formed is not particularly limited. For example, a convex portion or a concave portion of a cross-sectional ladder shape or a semi-circular shape of a cross-section, or a convex portion or a concave portion having a cylindrical shape, a conical shape, or a conical trapezoid shape may be provided. Further, in the present modification, an example in which the unevenness is provided on the second light entrance/exit surface 22 is described, but the unevenness may be provided on the first light entrance/exit surface or the light reflection surface 23. Further, irregularities may be provided on two or more surfaces of the first and second light entrance and exit surfaces 21 and 22 and the light reflecting surface 23. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing an optical device according to an embodiment of the present invention. Fig. 2 is a schematic perspective view of an optical element according to an embodiment of the present invention. Fig. 3 is a schematic view showing a part of the optical device of the first comparative example. Fig. 4 is a schematic view showing a part of the optical device of the second comparative example. 22 322761 201213911 A part of the schematic portion of the schematic portion of the schematic portion of the schematic portion of the schematic portion of the fifth embodiment of the third comparative example of the optical assembly. Fig. 6 is an optical assembly relating to the fourth comparative example. Fig. 7 is an optical assembly of the first modification. Fig. 8 is an optical assembly of a second modification.
第 9圖係專利文獻1中記載之光學震 置的簡圖式剖面 第10圖係有關第3變形例之光學装置的示意圖。 第11圖係於第4變形例中之光學元件的簡圖式斜視 置的一部分的簡圖 第12圖係有關第4變形例之光學裝 式分解斜視圖。 第13圖係有關第4變形例之光學裝置的—部分的簡圖 式侧面圖。 第14圖係第13圖的XIV簡圖式箭視圖。 【主要元件符號說明】 卜200 光學裝置 l〇a、l〇b 光纖的端部 12、 102受光元件 13、 203電路基板 21 第1光入出面 10、101、205 光纖 11 發光元件 12a 受光元件的受光面 20a、20b、20c光學元件 21a、22a透鏡面部 322761 23 201213911 22 第2光入出面 22b 凸部 23 光反射面 24、25 反射抑制膜 26、27 平面部 28 接著劑 30 支持器 30a 抵接面 30al 凹部 103 透鏡 104 反射構件 106 棱鏡 201 連接器 202 連接器本體 204 光電元件 101a 端部 106a、 106b 光入出面 106bl 透鏡面部 202a 受光面 202b 反射面 202c 底孔 A1、A2 、A3 光轴 24 322761Fig. 9 is a schematic cross-sectional view of optical vibration described in Patent Document 1. Fig. 10 is a schematic view showing an optical device according to a third modification. Fig. 11 is a schematic view showing a part of a perspective view of an optical element in a fourth modification. Fig. 12 is an exploded perspective view showing an optical device according to a fourth modification. Fig. 13 is a schematic side view showing a portion of the optical device according to the fourth modification. Figure 14 is a schematic view of the XIV schematic diagram of Figure 13. [Description of main component symbols] 卜200 optical device l〇a, l〇b fiber end 12, 102 light receiving element 13, 203 circuit board 21 first light entrance/exit surface 10, 101, 205 optical fiber 11 light emitting element 12a light receiving element Light-receiving surface 20a, 20b, 20c Optical element 21a, 22a Lens surface 322761 23 201213911 22 Second light entrance surface 22b convex portion 23 Light reflecting surface 24, 25 Reflection suppressing film 26, 27 Flat portion 28 Adhesive 30 Support 30a abuts Face 30al recess 103 lens 104 reflection member 106 prism 201 connector 202 connector body 204 photoelectric element 101a end portion 106a, 106b light entrance and exit surface 106bl lens surface portion 202a light receiving surface 202b reflection surface 202c bottom hole A1, A2, A3 optical axis 24 322761