TWI522081B - 使用多面體光學元件之多點雷射手術探頭 - Google Patents
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Description
本申請案係主張2009年12月10日提申之U.S.臨時申請案第61/285,400號之優先權,該臨時申請案之內容係併入於此以作為參考。
本發明係有關於光學手術探頭,且更特別有關於使用多面體光學元件之多點雷射手術探頭。
光學手術探頭係輸送光至手術場域以供各種應用。在一些應用中,輸送光至手術場域中的多數點會是有用的。例如,在網膜組織的泛網膜光凝固術中,會想要輸送雷射光至多數點,以便減少泛網膜光凝固術程序之時間。各種技術已被採用來為多點樣式產生多數光束。例如,一工作方式係使用繞射元件來將一進入的光束分割成多數點。但亦想要的是具有一可被置於光學手術探頭之遠側端處的多點產生器,以更容易從一單一輸入光束產生多數點,以至於該多點產生器可更容易與現存雷射源一起使用,不需要額外組件來調準雷射手術探頭與雷射源。
困難會出現在光學手術探頭之遠側端處繞射元件的使用。作為一範例,繞射元件係產生許多較高繞射級,且雖然這些繞射級相較於主要點樣式在光強度上係相對較低,但就其等之影響而論,這些繞射級可能並非總是可忽略的。作為另一範例,一繞射元件在不同折射介質中可能並不會有同一表現。例如,若繞射元件係被置於諸如食鹽溶液或油之非空氣的介質中,繞射元件之間的空間會被填充以具有不同於空氣之折射率的材料,此會毀壞點樣式。作為再另一範例,點之間的間距會因不同波長而變化,此在當瞄準光束係為某個顏色,而處理光束係為不同顏色時,會是個問題。最後,繞射元件時常是昂貴且難以產生的,且在當繞射元件必須被建構以安裝至諸如23-規(gauge)或更小之手術儀器手術探頭之遠側尖端的一小區域中之事例中特別是如此。因此,仍是有需要一種可使用手術探頭遠側端處之光學元件於一目標區域處產生多數點的光學手術探頭。
在本發明之特別實施態樣中,一光學手術探頭包括一手持件、一位在該手持件內的光導、及一位在該手持件之遠側端處的多點產生器。該手持件係被組構以光學地耦接至一光源。該光導係被組構以將一光束從該光源攜載至該手持件之遠側端。該多點產生器包括一有一多面體端表面與該光導之遠側端相隔開的多面體光學元件。該多面體端表面包括至少一小面傾斜於該光束之路徑。在各種實施態樣中,多面體端表面可為凸面或凹面。在本發明之某些實施態樣中,多點產生器係進一步包括一調焦元件,諸如一梯度指數(GRIN)透鏡或一藍寶石球透鏡。在某些實施態樣中,多面體端表面係形成於光學黏著劑中,且多點產生器可包括多數光學黏著劑材料。
在本發明之特別實施態樣中,製造多點光學手術探頭之方法包括沈積一光學黏著劑於一供手持件用之套管中。有套管形成以供使用之手持件係包括至少一光導,該光導係被組構以將光束從一光源攜載通過該手持件。該方法更包括形成光學黏著劑以產生一多面體之面。該方法亦包括熟化該光學黏著劑。該方法額外包括組裝該套管與該手持件以形成一多點產生器,該多點產生器包括於該手持件之遠側端處的光學黏著劑。在各種實施態樣中,光學黏著劑可被形成在諸如GRIN透鏡或藍寶石球透鏡之一調焦元件上或附近。在某些實施態樣中,多數光學黏著劑材料亦可被使用。
本發明之其他目標、特徵及優點將參照圖式、下列圖式說明及申請專利範圍而變得明顯。
第1圖例示出一光學手術探頭用之一手持件的遠側端,其包括依據本發明一特別實施態樣的一多點產生器;第2圖例示出依據本發明一特別實施態樣的另一多點產生器;第3圖例示出依據本發明一特別實施態樣的又另一多點產生器;第4圖係為一流程圖,其例示出依據本發明一特別實施態樣之製造一多點光學手術探頭的範例方法;及第5圖係為一流程圖,其例示出依據本發明一特別實施態樣之製造一多點光學手術探頭的另一範例方法。
第1圖例示出一供光學手術探頭用之手持件100的遠側端,其依照本發明一特別實施態樣包括一多點產生器102於一套管101中;該術語“遠側”係指沿該探頭100朝向一目標區域之方向,而其反義字“近側”係指相反方向。在所描繪的實施態樣中,該多點產生器102包括一近側多面體光學元件104及一遠側多面體光學元件106。就本說明書之目的而言,“多面體”係指任一光學元件具有一形成有多數次表面(小面)以至於該等小面之間的交會並不平滑之端表面。該等小面可為,但不必要為,平坦的。例如,一小面可為一彎曲次表面,該彎曲次表面係交會另一次表面,以至於曲線在橫跨該等次表面之交會處並不平滑;此類實施態樣可提供光學調焦能力。
一光導108係輸送光束至近側多面體光學元件104之近側平坦面。雖然該光導108原則上可為任何合適於將光傳送至手持件100之遠側端的結構,光學纖維在手術應用中係為最常被使用的。從光導108發射出之光束的中心軸線被指稱為“光束路徑”。當光束行進離開光導108時,該光束會視該光束耦接至光導108中的數值孔徑發散至一程度。為此原因,多面體光學元件之多面體光學表面係與光導108之遠側端相隔開,以至於部分的發散光束係被折射至不同位置。在本發明之各種實施態樣中,至少一小面係被定向,俾使得該小面中心處垂直於小面的方向並不平行於發射光束的光束路徑。此類小面於此係被描述為“傾斜於光束路徑”。
多面體光學元件104與106各具有不同的折射率,以至於當離開光導108之光束發散,近側光學元件104之凹面多面體之面與遠側光學元件106之凸面多面體之面之間的多面體介面產生顯露自遠側多面體光學元件106之遠側平坦面的多數點。“凹面”與“凸面”在此上下文中係指光學元件沿光束路徑不管向內或向外形成的多面體表面。視遠側多面體光學元件106與手術探頭所插入之介質的相對折射率而定,該等點可於從光學元件106之遠側面通過進入介質時進一步發散。例如,在手術探頭被設計成供用於食鹽溶液中的一特別範例中,近側多面體光學元件104可具有一折射率為1.36,而遠側多面體光學元件可具有一折射率為1.58,此在設若小面與光束路徑之間的角度為35至55度的範圍內時會對約4 mm遠的目標產生釐米等級之點間距。
在所描繪的實施態樣中,光學元件104與106各具有四個三角形小面傾斜於光束路徑,該等小面相會於與來自光導之光束中心對準的一點,以至於該多點產生器102產生四個輸出點。然,原則上,小面的數目及形狀可被調整以產生一所欲樣式的輸出點。例如,小面的數目可被增加。在另一範例中,可有一中心平坦小面垂直於光束路徑,伴隨著周圍角度傾斜的小面,以產生被多數點圍繞的一中心點。
多面體光學元件104與106可有利地由光學黏著劑形成。使用光學黏著劑來形成多面體光學元件具有數個技術優點。一個優點是多面體光學元件104與106的折射率可被選自許多可得材料。另一優點是相較於較硬的折射材料在形成多面體表面上相對容易,較硬的折射材料可能難以模製、蝕刻、切割、或機械加工成合適的形狀。一第三優點是光學黏著劑材料相較於其他會相對易碎的光學元件,像是繞射光柵,在使用上會相對耐用。一第四優點是光學黏著劑可被形成在其他光學組件附近,讓該光學黏著劑及該其他光學組件得以一起作用產生一多點樣式。
作為多面體光學元件如何可以被形成在其他光學組件附近的一個範例,第2圖例示出依據特別發明之特別實施態樣的一多點產生器202,該多點產生器202包括一多面體光學元件204形成在一球透鏡206附近。球透鏡206的主要功能是將入射光束調焦,使其不是瞄準就是收斂於球透鏡206之遠側邊上。球透鏡206可為由用以將光從光源傳送通過透鏡之任何折射材料所形成的任何球形或近乎球形的透鏡。為了能調焦為一經瞄準或經收斂的光束,球透鏡的折射率應大於周圍黏著劑介質的折射率。一範例是可見折射率大體為1.76之藍寶石球透鏡與1.57-1.58之較低黏著劑折射率。在所描繪的實施態樣中,多面體光學元件204之凸面多面體端表面208係被配置成指向光導108,且該多面體端表面208係與光導108之遠側端相隔開。部分的發射光束係接著由該多面體光學元件204折射成多數點,且該等點係被傳送通過球透鏡206至多面體光學元件204之平坦遠側表面之外。在一任擇的實施態樣中,多面體端表面208可為凹面。球透鏡206可收斂被導引至各點中的光束達某程度以產生一多點樣式,以當與手持件100之端相距增加時,該多點樣式不會同樣地快速展開,此因而得以讓該多點樣式具有一更一致的點間距,而不管手持件100之遠側端與目標區域之間間距上之輕微變異。
一任擇實施態樣併入了一近側調焦透鏡及多面體光學元件的一多面體表面。第3圖例示出一範例,其具有一多點產生器302,該多點產生器302併入了一近側多面體光學元件304、一遠側多面體光學元件306、及一圓柱狀梯度指數(GRIN)透鏡308。發射自光導108的光束係被擴張且接著藉由GRIN透鏡308而被瞄準或收斂。經瞄準或收斂之光束接著進入近側多面體光學元件304的一平坦近側面,且部分的經瞄準或收斂之光束當通過多面體光學元件304與306之多面體表面之間的介面時係被折射成多數點。如同於前述實施態樣中,此產生發射自遠側光學元件306的一平坦遠側面的一多點輸出光束。因為該光束係經藉由GRIN透鏡而被瞄準或收斂,多面體光學元件304與306的傾斜小面相較於第1圖之實施態樣可相對於光束路徑有更淺的角度,諸如於15至35度之範圍內,而仍在目標區多數點之間產生相同程度的展開。
第4圖係為一流程圖400,其例示出一用於從具有不同折射率之光學黏著劑形成多面體光學元件的範例方法。於步驟402,一第一光學黏著劑係被沈積於供手術手持件用之套管內。在一特別範例中,一光學纖維可於此步驟期間使用一中心圓柱而置於該套管內,且該第一光學黏著劑可直接沈積至該光學纖維的一遠側端上。在另一範例中,一GRIN透鏡可在光導之遠側端處置於套管內,且該第一光學黏著劑可被沈積於GRIN透鏡之遠側端上。於步驟404,一多面體表面係被形成於該光學黏著劑中。例如,一具有一凸面多面體形狀的銷子可從套管之遠側端模製於該光學黏著劑中以在該光學黏著劑中產生一凹面多面體表面。任何合適於形成光學黏著劑的技術可被使用,且使用高精密度模製技術來一致且精確地產生黏著劑之多面體表面可特別有利。接著,於步驟406,該第一光學黏著劑係藉諸如暴露於紫外(UV)光、熱或化學熟化劑而被熟化,藉此硬化該第一光學黏著劑成為所欲形狀且讓該模製銷子得以被移除。
於步驟408,一第二光學黏著劑係被沈積於先前熟化的光學黏著劑之遠側面上。該第二光學黏著劑係順應於該第一光學黏著劑的凹面多面體表面以在該第二光學黏著劑中產生一凸面多面體表面。該第二光學黏著劑之遠側表面可接著藉壓下一模板而被平坦化。任擇地,光學黏著劑之沈積可另外受控制以產生一所欲形狀,諸如藉由導入一封閉模具體積。在後者之事例中,若所欲,兩多面體表面可被形成。於步驟410,該第二光學黏著劑係被熟化以將其硬化成為所欲形狀。不同的熟化過程可被使用於該第一及第二光學黏著劑。例如,若黏著劑係藉光熟化,則用以熟化第二黏著劑的光波長可不同於用以熟化第二黏著劑的波長,以至於不會有負面作用來自於使第一黏著劑過度暴露於熟化輻射。在就光-熟化黏著劑之另一變異中,用以形成第二光學黏著劑的一模板或其他封閉模具亦可由熟化輻射可透通的材料製成(如,石英之於UV熟化輻射),以至於該第二黏著劑可在模板仍放置時被熟化。該模板可接著於熟化後移除。該套管與該第一及第二光學黏著劑可接著於步驟412組裝於一手術手持件中以完成該方法。
第5圖係為一流程圖500,其例示出一依據本發明另一實施態樣之用以在另一光學元件附近形成一多面體光學元件的範例方法。於步驟502,光學黏著劑係於一球透鏡附近沈積於一模板上。於步驟504,形成在該球透鏡附近的該光學黏著劑係被壓入一套管之遠側端。該模板可包括一套管導件以促使對準於該套管。當該光學黏著劑係被壓入該套管中時,過量的光學黏著劑係被迫使留在該套管之外,以至於在充分周到地控制黏著劑之沈積量下,一致且精確量的光學黏著劑最終將位於該套管內。
於步驟506,一多面體表面係被形成在該光學黏著劑的近側端上。該多面體表面可為凸面或凹面。該多面體表面可,例如,藉由使用在插入套管近側端之端上有互補多面體表面的銷子而被形成。於步驟508,該光學黏著劑係被熟化,硬化該光學黏著劑成為所欲形狀且讓該模製銷子及模板得以被移除。該手持件係於步驟510與該套管組裝,而完成該方法。
本發明於此係藉由範例例示,而此技藝中具有通常技術者可進行各種修改。雖然本發明係被詳細描述,但應理解的是,可對其進行各種改變、取代及變更而不悖離所請發明之範疇。
100...手持件
101...套管
102...多點產生器
104、106...(多面體)光學元件
108...光導
202...多點產生器
204...多面體光學元件
206...球透鏡
208...多面體端表面
302...多點產生器
304、306...多面體光學元件
308...圓柱狀梯度指數(GRIN)透鏡
400、500...流程圖
402、404、406、408、410、412...步驟
502、504、506、508、510...步驟
第1圖例示出一光學手術探頭用之一手持件的遠側端,其包括依據本發明一特別實施態樣的一多點產生器;
第2圖例示出依據本發明一特別實施態樣的另一多點產生器;
第3圖例示出依據本發明一特別實施態樣的又另一多點產生器;
第4圖係為一流程圖,其例示出依據本發明一特別實施態樣之製造一多點光學手術探頭的範例方法;及
第5圖係為一流程圖,其例示出依據本發明一特別實施態樣之製造一多點光學手術探頭的另一範例方法。
100...手持件
101...套管
108...光導
202...多點產生器
204...多面體光學元件
206...球透鏡
208...多面體端表面
Claims (17)
- 一種光學手術探頭,其包含:一手持件,該手持件係被組構以光學地耦接至一光源;至少一位於該手持件內的光導,該至少一光導係被組構以將光束從該光源攜載至該手持件之遠側端;一在該手持件之遠側端處的多點產生器,該多點產生器包括一多面體光學元件,該多面體光學元件有一多面體端表面與該光導之遠側端相隔開,該多面體端表面具有複數個平坦小面,與該光束之路徑形成一傾斜角,其中該多點產生器係被構形成將該光束分開成多數個光元件,以及將該等光元件重定向為多數個分離的點。
- 如請求項1之光學手術探頭,其中該多面體光學元件具有一凹面多面體之面。
- 如請求項1之光學手術探頭,其中該多面體光學元件具有一凸面多面體之面。
- 如請求項1之光學手術探頭,其中該多點產生器更包含一球對稱性球透鏡。
- 如請求項4之光學手術探頭,其中該球透鏡係位於該多面體光學元件內。
- 如請求項1之光學手術探頭,其中該多點產生器更包含一梯度指數(GRIN)透鏡介於該至少一光導與多面體光學元件之間。
- 如請求項1之光學手術探頭,其中該多面體光學元件包 含一多面體光學黏著劑。
- 如請求項7之光學手術探頭,其中該多面體光學黏著劑係為一具有一第一折射率的第一多面體光學黏著劑,而該多點產生器更包含一第二多面體光學黏著劑,該第二多面體光學黏著劑具有一第二折射率不同於該第一折射率。
- 如請求項8之光學手術探頭,其中該第一多面體光學黏著劑具有一凹面多面體之面,而該第二多面體光學黏著劑具有一凸面多面體之面與該第一光學黏著劑之該凹面多面體之面接觸。
- 如請求項1之光學手術探頭,其中該光源包含一雷射。
- 如請求項1之光學手術探頭,其中該手持件係被組構以在光學耦接至一第一光源與光學耦接至一第二光源之間切換,該第一光源產生具一第一波長的光,而該第二光源產生具不同於該第一波長之第二波長的光,其中該第一及第二波長之至少一者係為可見的。
- 如請求項1之光學手術探頭,其中該手持件之遠側端之尺寸係被定為23規(Gauge)或更小。
- 一種製造多點光學手術探頭之方法,其包含:沈積一光學黏著劑於一供一手持件用之套管中,該手持件包括至少一光導被組構以將光束從一光源攜載通過該手持件;形成該光學黏著劑以產生一多面體之面;熟化該光學黏著劑;及 組裝該套管與該手持件以在該手持件之遠側端處形成一包括該光學黏著劑之多點產生器。
- 如請求項13之方法,更包含在一球透鏡附近形成該光學黏著劑。
- 如請求項13之方法,其中:該光學黏著劑係為具有一第一折射率的第一光學黏著劑;且該方法更包含:沈積一具有不同於該第一折射率之第二折射率的第二光學黏著劑於該第一光學黏著劑之多面體之面上;及熟化該第二光學黏著劑。
- 如請求項13之方法,其中形成該光學黏著劑之步驟包含以一插入該套管中的模製銷子來模製該光學黏著劑。
- 如請求項13之方法,其中該手持件包含一梯度指數(GRIN)透鏡介於該至少一光導與該多點產生器之間。
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EP2509525B1 (en) | 2015-12-02 |
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ES2557883T3 (es) | 2016-01-29 |
EP2509525A4 (en) | 2013-08-14 |
AU2010328437B2 (en) | 2015-01-22 |
CN102791213A (zh) | 2012-11-21 |
KR20120104298A (ko) | 2012-09-20 |
US20110141759A1 (en) | 2011-06-16 |
JP5753186B2 (ja) | 2015-07-22 |
BR112012013750A2 (pt) | 2016-03-15 |
MX2012006536A (es) | 2012-07-17 |
US10660704B2 (en) | 2020-05-26 |
US20170112573A1 (en) | 2017-04-27 |
US8764261B2 (en) | 2014-07-01 |
CN102791213B (zh) | 2015-01-21 |
US9572479B2 (en) | 2017-02-21 |
US20140250668A1 (en) | 2014-09-11 |
KR101689250B1 (ko) | 2016-12-23 |
CA2781677C (en) | 2017-07-11 |
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