1294507 九、發明說明： 【發明所屬之技術領域】 本發明有關於光源用反射體，特別有關於用來形成大 致平行之光束之反射體。 另外，本發明亦關於使用有此種光源用反射體之光源 裝置，及使用有此光源裝置之照明裝置。 【先前技術】 照明裝置如第1 〇圖所示者，從具有指定之面積之射出 % 面，射出均一之照明光。在形成射出面之光擴散透過板1 之背部，配置對此光擴散透過板1傾斜指定之角度之平面 反射板2，從光擴散透過板1之側方，利用光源裝置3將 光束送入到平面反射板2和光擴散透過板1之間。如第1 1 圖所示，射入到光擴散透過板1之光束之一部分，透過光 擴散透過板1和在此被擴散，朝向照射區域照射，另外， 射入到光擴散透過板1之光束之其餘部分，被光擴散透過 板1反射，在平面反射板2和光擴散透過板1之間重複反 •射，在平面反射板2和光擴散透過板1之間行進。另外’ 依照情況之不同，取代平面反射板2，亦可以使用另外一 片之光擴散透過板，在雙方之光擴散透過板之間送入之光 束，在此等之光擴散透過板之間，重複一部分反射擴散和 一部分透過擴散地行進。 在此處如第11圖之虛線所示之光線L 1，對於在對光 擴散透過板1具有越大角度之平面反射板2和光擴散透過 板1之間送入之光束，對行進距離被光擴散透過板1反射 1294507 之次數就越增加。如第1 1圖之實線所示之光線L2，對光 擴散透過板1和平面反射板2，以儘可能小之角度射入， 則對於越小射束角之光束之行進距離，被光擴散透過板1 反射之次數就變少。光束每次射入到光擴散透過板1時， 其一部透過光擴散透過板1地射出，光能量減少，所以在 光束長距離行進，要從射出面全體射出均一之照明光時， 最好從第1 〇圖之光源裝置3，將上述之儘可能小之射束角 之光束送入到平面反射板2和光擴散透過板1之間。 B 除此之外，不少要求使光擴散透過板1和平面反射板 2之間隔，或代替平面反射板2而採用之另外一片之光擴 散透過板之間隔變小。 照明裝置之光源裝置可以使用各種者，例如，在專利 文獻1中，所揭示之光源裝置是在光源燈泡之背部配置橢 圓反射鏡，從光源燈泡朝向後方發出之光被橢圓反射鏡反 射，朝向前方送出。 [專利文獻1]日本專利特開2002-23 1 008號公報 φ【發明內容】 (發明所欲解決之問題） 但是，在專利文獻1所揭示之利用橢圓反射鏡之反射 ，依照光源之大小使射束角變小，和使儘可能多之光束進 行光擴散透過板1和平面反射板2之間，或是進入與代替 平面反射板2之另外一片光擴散透過板之被容許之受光部 ，具有一定之限度，因爲光源之剖面具有大面積’所以具 有大小射束角而且朝向該2片之板之間之被容許之受光部 1294507 之方向，要形成全部之光射入到此受光部之 ，當使用作爲第1 〇圖所示之照明裝置之光源 生光能量之損失變大之問題。 本發明用來消除此種問題而達成者，其 源用反射體，可以使從光源燈泡發出之光作 而且可以將在照明裝置之被容許之受光部之 部之光變換成爲射入光束。 另外，本發明之目的是提供光源裝置， • 光源用反射體以小射束角，而且可以發出光 置之被容許之受光部之方向行進之全部之光 另外，本發明之目的是提供使用有上述 置之照明裝置。 (解決問題之手段）1294507 IX. Description of the Invention: [Technical Field] The present invention relates to a reflector for a light source, and more particularly to a reflector for forming a substantially parallel beam. Further, the present invention relates to a light source device using such a light source reflector, and an illumination device using the same. [Prior Art] As shown in Fig. 1, the illumination device emits uniform illumination light from the emission % plane having a specified area. On the back of the light-diffusing transmission plate 1 on which the emission surface is formed, the planar reflection plate 2 which is inclined at a predetermined angle to the light-diffusing transmission plate 1 is disposed, and the light beam is transmitted from the side of the light-diffusing transmission plate 1 to the light source device 3 The plane reflection plate 2 and the light diffusion plate are transmitted between the plates 1. As shown in Fig. 1, a portion of the light beam incident on the light-diffusing transmission plate 1 is transmitted through the light-diffusing transmission plate 1 and diffused thereto, irradiated toward the irradiation region, and is incident on the light-diffusing plate 1 The rest of the light is diffused through the plate 1 and repeatedly reflected between the flat reflector 2 and the light diffusing plate 1 to travel between the planar reflector 2 and the light diffusing plate 1. In addition, depending on the situation, instead of the flat reflector 2, another light diffusing through the plate may be used, and the light beams that are transmitted between the two diffused transmission plates are diffused between the plates and repeated. A portion of the reflection diffuses and a portion travels through the diffusion. Here, the light beam L1 shown by the broken line in Fig. 11 is a light beam which is fed between the plane reflection plate 2 and the light diffusion transmission plate 1 having a larger angle to the light diffusion transmission plate 1, and the traveling distance is light. The number of times the diffusion through the plate 1 reflects 1294507 increases. The light ray L2 shown by the solid line in FIG. 1 is incident on the light-diffusing transmission plate 1 and the planar reflection plate 2 at an angle as small as possible, and the distance traveled by the beam of the smaller beam angle is received. The number of times the diffusion is reflected by the plate 1 is reduced. When the light beam is incident on the light-diffusing transmission plate 1 each time, one of the light beams is transmitted through the light-diffusing transmission plate 1 and the light energy is reduced. Therefore, when the light beam travels over a long distance, it is preferable to emit uniform illumination light from the entire emission surface. From the light source device 3 of the first drawing, the light beam of the beam angle as small as possible is fed between the plane reflection plate 2 and the light diffusion transmission plate 1. In addition to this, there are many requirements for the light to diffuse through the space between the plate 1 and the planar reflecting plate 2, or to replace the planar reflecting plate 2, and the light diffusing through the plate becomes smaller. The light source device of the illumination device can be used in various applications. For example, in Patent Document 1, the light source device is configured such that an elliptical mirror is disposed on the back of the light source bulb, and light emitted from the light source bulb toward the rear is reflected by the elliptical mirror toward the front. Send it out. [Patent Document 1] Japanese Patent Laid-Open Publication No. 2002-23 No. 008. SUMMARY OF THE INVENTION (Problems to be Solved by the Invention) However, the reflection by the elliptical mirror disclosed in Patent Document 1 is made according to the size of the light source. The beam angle is reduced, and as many light beams as possible are diffused through the plate 1 and the planar reflector 2, or into the allowed light receiving portion of the other light diffusing transmission plate instead of the planar reflector 2. There is a certain limit, because the cross section of the light source has a large area, so it has a large beam angle and faces the direction of the tolerated light receiving portion 1294507 between the two plates, and all of the light is formed into the light receiving portion. When the light source used as the illumination device shown in Fig. 1 is used, the loss of the light-generating energy becomes large. The present invention has been made to solve such a problem, and the source of the reflector can be used to convert light emitted from the light source bulb into light that is allowed to pass through the light receiving portion of the illumination device into an incident light beam. Further, an object of the present invention is to provide a light source device, a light source reflector having a small beam angle and capable of emitting all of the light that is allowed to travel in the direction of the light receiving portion, and the object of the present invention is to provide use The illumination device described above. (the means to solve the problem)
本發明之第1光源用反射體，被配置在 部，用來將來自光源燈泡之光反射向X軸方 1反射部，具有反射面朝向X軸方向開放之 •構成；和第2反射部，連結在第1反射部之 有隨著朝向X軸方向擴大直徑之圓錐狀之反 另外，本發明之第2光源用反射體，在 ，被配置在光源燈泡之背部，用來將來自光 射向X軸方向，具備有：第1反射部，在Y 和具有在XZ面之剖面形狀成爲朝向X軸方 之反射面；和第2反射部，連結在第1反射 端部，而且在Y軸方向伸長，和具有在XZ 光束變爲困難 裝置時，會產 目的是提供光 成小射束角， 方向行進之全 可以使用此種 束將在照明裝 射入。 方式之光源裝 光源燈泡之背 向，具備有第 曲線之旋轉體 前端，而且具 射面。 Y軸方向伸長 源燈泡之光反 軸方向伸長， 向開放之曲線 部之X軸方向 面之剖面形狀 -7- 1294507 成爲朝向χ軸方向開放成傾斜狀之直線之反射面。 在此第2光源用反射體中，可以以各個反射面朝向外 方開放之方式使一對之第1反射部互相連結，在雙方之第 1反射部分別連結第2反射部。 另外，在第1和第2光源用反射體中，可以使第1反 射部之該曲線使用橢圓、正圓和拋物線中之任一種。 另外，本發明之光源裝置具備有：上述之光源用反射 體；和光源燈泡，被配置在此光源用反射體之內側。 • 另外，本發明之照明裝置具備有：該光源裝置；光擴 散透過板，被配置在此光源裝置之X軸方向前方，而且在 XY面上延伸，和形成射出面；和平面反射板，被配置在光 源裝置之X軸方向前方，而且對光擴散透過板成爲平行或 傾斜指定之角度。 (發明之效果） 依照本發明時，可以具有小射束角，而且可以使朝向 被容許之受光部行進之大致全部之光，形成射入到此受光 春部之光束。 【實施方式】 下面根據附圖用來說明本發明之實施形態。 實施例1 第1圖表示實施例1之光源用反射體之構造。此光源 用反射體1 〇由第1反射部Π，和連結到第1反射部1 1之 前端之第2反射部1 2形成。第1反射部1 1具有反射面1 1 a ，由朝向X軸方向開放之旋轉橢圓體構成，第2反射部1 2 1294507 具有圓錐體之反射面2a，朝向X軸方向擴大直徑。 另外，在第1反射部1 1之X軸方向之端部，形成有開 口部1 3，用來讓圖中未顯示之光源燈泡插入。 第1反射部1 1和第2反射部1 2之製造是例如分別由 樹脂形成，利用真空蒸著等之方法，在其內面疊層形成對 可視光具有反射特性之金屬薄膜。 如第2圖所示，在第1反射部1丨之開口部丨3插入光 源燈泡1 4用來形成光源裝置1 5。作爲光源燈泡1 4者可以 鲁使用放電燈之一種之金屬鹵素燈泡或鈉蒸氣燈泡等。 從光源燈泡1 4之發光部發出之射入到第1反射部i i 之反射面1 1 a之光線L 3，被此反射面1 1 a反射朝向前方（X 軸方向）行進。同樣地，從光源燈泡1 4之發光部發出之射 入到第2反射部1 2之反射面1 2a之光線L4，亦被此反射 面1 2 a反射朝向前方行進。 假如未存在有第2反射部1 2時，如第2圖之2點鏈線 所示，當由第1反射部1 1之旋轉橢圓體構成之反射面1 1 a 鲁在X軸方向延伸時，因爲該光線L4被在此X軸方向延伸 之第1反射部1 1之反射面1 1 a反射，所以如虛線所示，成 爲對X軸形成大角度之反射光線L4’，成爲包含有很多此 種光線之光束，造成其射束角變大。 要避免成此種問題時，使形成第1反射部1 1之旋轉橢 圓體成爲更淺（X軸方向之長度變短），使朝向前方行進之光 之一部分失去，或是使旋轉橢圓體成爲更大，在超過光線 L4射入到第2圖之第2反射部12之反射面12a之點，捕 1294507 捉此光線L4，可以獲得對X軸具有同樣角度之反射光線。 但是，以此方式形成之光束變成需要更大之受光部，故要 將朝向可容許之受光部之方向前進之全部光束射入到有關 之受光部變爲困難之虞。 本發明如上述之方式，因爲光源用反射體10具備有： 第1反射部1 1，具有旋轉橢圓體之反射面1 1 a ;和第2反 射部1 2，具有圓錐狀之反射面1 2 a ;所以使從光源燈泡1 4 之發光部發出之光，以小射束角，而且使其全部之光射入 φ 到受限制之受光部，可以變換成光束地行進。 第2反射部12不是意味光源發出之全部光束只捕捉稍 微比例，在只使用第1反射部1 1之情況時對開口部端施加 去角部，至少捕捉全部光束之2%以上，最好是擔任形成更 小之射束角之形成之任務。最好，第2反射部1 2之X軸方 向之長度，具有第1反射部11之X軸方向之長度之10°/〇 以上。 在與第1 0圖所示之照明裝置相同構造之照明裝置，安 0裝第2圖之光源裝置，其方式以第3圖表示。在光源裝置 15之X軸方向前方配置具有光擴散透過板16和平面反射 板1 7之照明器具1 8。光擴散透過板1 6在XY面上延伸和 形成此照明裝置之射出面，平面反射板1 7被配置成與光擴 散透過板1 6大致平行，但是對光擴散透過板1 6傾斜指定 之角度，成爲越朝向X軸方向，與光擴散透過板1 6之間隔 越狹之方式。 當從光源裝置1 5將小射束角之光束送入到平面反射 板1 7和光擴散透過板1 6之間時，光束直接地，或被平面 -10- 1294507 反射板1 7 —旦反射後，射入到光擴散透過板1 6，其一部 ' 分透過光擴散透過板1 6和在此處被擴散，照射到照射區域 ，其餘之部分被光擴散透過板1 6反射，在平面反射板1 7 和光擴散透過板1 6之間重複反射，在平面反射板1 7和光 擴散透過板1 6之間行進。 在此處如上述之方式，因爲從光源裝置1 5發出小射束 角之光束，所以對於光束之行進距離，光擴散透過板1 6之 反射次數變少，光能量之減少變小。因此，光束可以充分 φ 地行進到光擴散透過板1 6和平面反射板1 7之X軸方向端 部，從射出面全體射出均一之照明光。 另外，亦可以將平面反射板1 7配置成對光擴散透過板 1 6平行。 實施例2 第4圖表示實施例2之光源用反射體之構造。此光源 用反射體20是在第1圖所示之實施例1之光源用反射體 10中，使用具有由正圓之旋轉體之球面構成之反射面21a 0之第1反射部2 1，用以代替具有由旋轉橢圓體構成之反射 面1 1 a之第1反射部1 1。在此種第1反射部21之前端連 結有第2反射部22具有與實施例1之第2反射部12同樣 之圓錐狀之反射面22a。另外，在第1反射部21之X軸方 向之端部形成有開口部2 3，用來讓圖中未顯示之光源燈泡 插入。 假如將光源燈泡插入到此光源用反射體20之第1反射 部2 1之開口部2 3，與第2圖所示之光源裝置1 5同樣地， 可以將從光源燈泡之發光部發出之光變換成爲小射束角之 -11- 1294507 光束地行進。 假如安裝使用光源用反射體2 〇之光源裝置3，用以代 替第3圖所示之照明裝置之光源裝置1 5時，可以從射出面 全體射出均一之照明光。 另外，第2反射部22最好捕捉至少全體光束之2%以 上’擔任形成更小射束角之任務。最好，使第2反射部22 之X軸方向之長度具有第1反射部21之X軸方向之長度 之10%以上。 實施例3 第5圖表示實施例3之光源用反射體之構造。此光源 用反射體2 5是在第1圖所示之實施例1之光源用反射體 1 0中’使用具有使拋物線圍繞其軸旋轉之旋轉體構成之反 射面26a之第1反射部26代替由具有由旋轉橢圓體構成之 反射面1 1 a之第1反射部1 1。在此種第1反射部2 6之前 端連結具有圓錐狀之反射面27a之第2反射部27。另外， 在第1反射部26之一 X軸方向之端部，形成有開口部28 用來讓圖中未顯示之光源燈泡插入。 假如將光源燈泡插入到此光源用反射體2 5之第1反射 部26之開口部28時，可以形成使其全部之光射入到更狹 或更小之受光部之光束。 假如安裝使用有光源用反射體25之光源裝置，用以代 替第3圖所示之照明裝置之光源裝置丨5時，可以從射出面 全體射出均一之照明光。 另外’第2反射部27最好捕捉至少全部光束之2%以 上’擔任形成更小射束角之任務。最好使第2反射部2 7之 -12- 1294507 X軸方向之長度具有第1反射部26之X軸方向之長度之 ' 10%以上。 實施例4 第6圖表示實施形態4之光源用反射體之構造。此光 源用反射體3 0之形成包含有：第1反射部3 1，在Y軸方 向伸長；和一對之第2反射部3 2，分別連結在第1反射部 31之一對之X軸方向端部，而且在Y軸方向伸長。第1反 射部3 1具有反射面3 1 a，使XZ面之剖面形狀成爲朝向X φ 軸方向開放形成橢圓，一對之第2反射部3 2具有反射面 3 2a，使XZ面之剖面形狀成爲在X軸方向，互相開放成傾 斜狀，成爲直線。 在此光源用反射體3 0之內側形成在Y軸方向伸長之配 置有光源燈泡3 3之光源裝置。 從光源燈泡3 3發出之光束，直接或被第1反射部3 1 之反射面3 1 a和第2反射部3 2之反射面3 2 a反射，成爲小 射束角之光束地行進。 φ 假如安裝使用有光源用反射體3 0之光源裝置，用以代 替第3圖所示之照明裝置之光源裝置丨5時，可以從射出面 全體射出均一之照明光。 第2反射部3 2最好捕捉至少全部光束之2 %以上，擔 任形成更小射束角之任務。最好使第2反射部3 2之X軸方 向之長度具有第1反射部31之X軸方向之長度之1〇%以上 〇 另外，第1反射部3 1之反射面3 1 a使X Z面之剖面形 狀形成爲朝向X軸方向開放之橢圓，但是並不只限於此， -13- 1294507 例如可以成爲具有反射面使χζ面之剖面形狀形成爲朝向 X軸方向開放之圓弧（正圓）或拋物線者，可以獲得同樣之效 果。 實施例5 第7圖表示實施例5之光源用反射體之構造。此光源 用反射體40被構建成如第6圖所示之實施例4,使在γ軸 方向伸長而且朝向X開放之二個光源用反射體互相背對背 地連結’成爲朝向+Χ軸方向和-X軸方向雙方開放。亦即 # ，在Υ軸方向伸長之一對之第1反射部5 1和6 1，連結成 爲分別朝向+Χ軸方向和-X軸方向，和在Υ軸方向伸長之 一對之第2反射部5 2連結在第1反射部5 1之+ X軸方向端 部，和在Υ軸方向伸長之一對之第2反射部6 2連結在第1 反射部6 1之-X軸方向端部。 第1反射部5 1和6 1分別具有反射面5 1 a和6 1 a，使 XZ面之剖面形狀形成爲朝向+χ軸方向和_x軸方向開放成 爲橢圓。另外，一對之第2反射部52具有反射面52a，使 • XZ面之剖面形狀形成爲朝向+X軸方向互相開放成爲傾斜 狀’成爲直線’一對之第2反射部62具有反射面62a，使 XZ面之剖面形狀形成爲朝向-X軸方向互相開放成爲傾斜 狀，成爲直線。 在第1反射部5 1和6 1之連結部分形成有在X軸方向 貫穿之開口部4 1，在此開口部4 1配置有在γ軸方向伸長 之光源燈泡42，用來形成光源裝置。 從光源燈泡4 2朝向X Z面之3 6 0度之方向發出光束， -14- 1294507 此等光束中之朝向+χ軸方向之光束，直接，或被第1反射 部51之反射面51a和第2反射部52之反射面52a反射， 成爲小射束角之光束地行進。另一方面，朝向-X軸方向之 光束，直接，或被第1反射部61之反射面61a和第2反射 部62之反射面62a反射，成爲小射束角之光束地行進。 依照此種方式，假如使用實施例5之光源用反射體4 0 時，可以從一個之光源燈泡42，獲得在+X軸方向和-X軸 方向被分割成爲2個之光束。因此，假如在光源用反射體 鲁 40之+X軸方向前方和-X軸方向前方分別配置第3圖所示 之照明器具1 8時，可以使用一個之光源燈泡42，同時從 二個之照明器具1 8射出均一之照明光。 在此種情況，如第8圖所示，假如在光源用反射體4 0 之第1反射部5 1和6 1之前方，分別經由被配置成傾斜之 平面反射板53和63，配置照明器具18時，可以將二個之 照明器具1 8配置成互相平行地進行照明。 另外，經由使用本實施例5之光源用反射體40，在形 •成被分割成爲2個之光束之後，假如更使用如第9圖所示 由使各個光束彎曲之反射板構成之光分割器4 3分割成爲2 個時，則可以從一個之光源燈泡42獲得被分割成爲4個之 光束，可以從4個之照明器具1 8進行照明。 在本實施例5之光源用反射體4 0中，第1反射部5 1 之反射面5 1 a和第1反射部6 1之反射面6 1 a使XZ面之剖 面形狀形成橢圓，但是並不只限於此種方式，例如對於具 有反射面者’使XZ面之剖面形狀形成圓弧（正圓）或拋物線 -15- Ϊ294507 ’可以獲得同樣之效果。 在上述之實施例1〜5之光源用反射體中，經由在第1 R身ί部和第2反射部之反射面形成多層構造之反射膜等， :&反射特性具有波長分布，可以促進可視光之反射，可以 抑I制熱射線之反射。依照此種方式時可以減少軸射熱，例 如可以實現適於植物栽培用之照明裝置。 另外，相反地促進熱射線之反射，抑制可視光之反射 ’利用此種方式之反射面，可以成爲有效利用輻射熱之照 _明裝置。 【圖式簡單說明】 第1圖是剖面圖，用來表示本發明之實施例1之光源 用反射體之構造。 第2圖是剖面圖，用來表示本發明之實施例1之光源 用反射體之光源裝置。 第3圖是剖面圖，用來表示使用有第2圖之光源裝置 之照明裝置。 • 第4圖是剖面圖，用來表示實施例2之光源用反射體 〇 第5圖是剖面圖，用來表示實施例3之光源用反射體 〇 第6圖是斜視圖，用來表示實施例4之光源用反射體 〇 第7圖是剖面圖，用來表示實施例5之光源用反射體 -16- 1294507 第8圖是示意圖， 反射體之照明裝置。 用來表示使用有實施例5之光源用 第9圖是斜視圖， 之光分割器。 用來表示實施例5之變化例所使用 第1 〇圖是表示照明裝置之斜視圖。 第1 1圖表示照明裝置內之光束之行進方向。 【主要元件符號說明】 1 0,20,3 0,40，50 光源用反射體 1 1，2 1，26,31，51，61 第1反射部 11a，12a,21a，22a 反射面 26a，27a,31a,32a 反射面 51a，52a，61a,62a 反射面 1 2,22,27,3 2,5 2,62 第2反射部 1 3,23,2 8,4 1 開口部 14,33,42 光源燈泡 15 光源裝置 16 光擴散透過板 17,53,63 平面反射板 18 照明器具 43 光分割器 -17-The first light source reflector of the present invention is disposed at a portion for reflecting light from the light source bulb toward the X-axis 1 reflection portion, and has a configuration in which the reflection surface is opened in the X-axis direction, and a second reflection portion. In addition, the second light source reflector of the present invention is disposed on the back of the light source bulb for guiding the light from the light, which is connected to the first reflecting portion and has a conical shape which is enlarged in diameter in the X-axis direction. The X-axis direction includes: a first reflecting portion having a reflecting surface facing the X-axis in a cross-sectional shape on the XZ plane; and a second reflecting portion connected to the first reflecting end portion and in the Y-axis direction Elongation, and when the XZ beam becomes a difficult device, the purpose is to provide the beam into a small beam angle, and the direction of travel can be used to inject into the lighting fixture. The light source of the light source is mounted on the back of the light source bulb, and has a front end of the rotating body having the first curve and has a convex surface. Elongation in the Y-axis direction The light source of the source bulb is extended in the opposite direction of the axis, and the cross-sectional shape of the X-axis direction of the open curve portion is -7- 1294507. It is a reflection surface of a straight line that is inclined toward the χ-axis direction. In the second light source reflector, the pair of first reflection portions may be connected to each other so that the respective reflection surfaces are open to the outside, and the second reflection portions are respectively connected to the first reflection portions. Further, in the first and second light source reflectors, the curve of the first reflecting portion may be any one of an ellipse, a perfect circle, and a parabola. Further, the light source device of the present invention includes: the above-described light source reflector; and a light source bulb disposed inside the light source reflector. Further, the illumination device of the present invention includes: the light source device; the light diffusion transmission plate disposed in front of the X-axis direction of the light source device, extending on the XY plane, and forming an emission surface; and a planar reflection plate It is disposed in front of the X-axis direction of the light source device, and is at an angle specified by the light diffusion plate to be parallel or inclined. (Effects of the Invention) According to the present invention, it is possible to have a small beam angle and to form a light beam that is incident on the light receiving spring portion by substantially all of the light traveling toward the allowable light receiving portion. [Embodiment] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Embodiment 1 Fig. 1 shows the structure of a reflector for a light source of Example 1. The light source reflector 1 is formed of a first reflecting portion Π and a second reflecting portion 12 connected to the tip end of the first reflecting portion 1 1 . The first reflecting portion 1 1 has a reflecting surface 11 a , and is formed of a spheroid that is open toward the X-axis direction. The second reflecting portion 1 2 1294507 has a reflecting surface 2 a of a cone and has a diameter that increases in the X-axis direction. Further, an opening portion 13 is formed at an end portion of the first reflecting portion 1 in the X-axis direction for inserting a light source bulb (not shown). For example, the first reflecting portion 1 1 and the second reflecting portion 1 2 are each formed of a resin, and a metal thin film having reflection characteristics for visible light is laminated on the inner surface by vacuum evaporation or the like. As shown in Fig. 2, the light source bulb 1 is inserted into the opening portion 3 of the first reflecting portion 1A to form the light source device 15. As the light source bulb 14, a metal halide bulb or a sodium vapor bulb which is one of the discharge lamps can be used. The light ray L 3 emitted from the light-emitting portion of the light source bulb 14 and incident on the reflecting surface 11 a of the first reflecting portion i i is reflected by the reflecting surface 11 a toward the front (X-axis direction). Similarly, the light ray L4 emitted from the light-emitting portion of the light source bulb 14 and incident on the reflecting surface 12a of the second reflecting portion 12 is also reflected by the reflecting surface 12a toward the front. When the second reflecting portion 1 2 is not present, as shown by the two-dot chain line in FIG. 2, when the reflecting surface 11 a formed by the spheroid of the first reflecting portion 1 1 extends in the X-axis direction Since the light ray L4 is reflected by the reflection surface 11 a of the first reflection portion 1 1 extending in the X-axis direction, as shown by the broken line, the reflected light ray L4 ′ which forms a large angle with respect to the X-axis includes a lot of The beam of such light causes its beam angle to become larger. In order to avoid such a problem, the spheroid forming the first reflecting portion 1 1 is made shallower (the length in the X-axis direction is shorter), and part of the light traveling toward the front is lost, or the spheroid is made Further, when the light beam L4 is incident on the reflecting surface 12a of the second reflecting portion 12 of the second drawing, the light ray L4 is captured, and the reflected light having the same angle to the X-axis can be obtained. However, since the light beam formed in this manner becomes a larger light receiving portion, it is difficult to inject all of the light beams that are advanced in the direction of the allowable light receiving portion into the light receiving portion. In the above-described embodiment, the light source reflector 10 includes: a first reflecting portion 1 1 having a reflecting surface 1 1 a of a spheroid; and a second reflecting portion 12 having a conical reflecting surface 1 2 Therefore, the light emitted from the light-emitting portion of the light source bulb 14 is converted into a light beam at a small beam angle and all of the light is incident on φ to the restricted light receiving portion. The second reflecting portion 12 does not mean that all of the light beams emitted by the light source are only slightly captured. When only the first reflecting portion 11 is used, the corner portion is applied to the opening end, and at least 2% or more of all the light beams are captured, preferably Serve as the task of forming a smaller beam angle. Preferably, the length of the X-axis direction of the second reflecting portion 1 2 is 10°/〇 or more of the length of the first reflecting portion 11 in the X-axis direction. In the illuminating device having the same structure as that of the illuminating device shown in Fig. 10, the light source device of Fig. 2 is mounted, and the mode thereof is shown in Fig. 3. A lighting fixture 18 having a light diffusing transmission plate 16 and a flat reflecting plate 17 is disposed in front of the light source device 15 in the X-axis direction. The light diffusing and diffusing plate 16 extends on the XY plane and forms an exit surface of the illuminating device. The plane reflecting plate 17 is disposed substantially parallel to the light diffusing and permeable plate 16 but inclined at a specified angle to the light diffusing and permeable plate 16 The closer to the X-axis direction, the narrower the interval from the light-diffusing transmission plate 16 is. When the beam of the beamlet angle is fed from the light source device 15 between the plane reflection plate 17 and the light diffusion transmission plate 16, the light beam is directly or reflected by the plane -10- 1294507 reflection plate 17 The light is diffused through the light-transmissive plate 166, and a portion thereof is diffused through the light-diffusing plate 16 and diffused there to illuminate the illuminating region, and the remaining portion is reflected by the light-diffusing plate 16 and reflected in the plane. The plate 17 and the light diffusing plate 16 are repeatedly reflected and travel between the plane reflecting plate 17 and the light diffusing plate 16. In the above-described manner, since the light beam of the small beam angle is emitted from the light source device 15, the number of times of reflection of the light diffusing and transmitting plate 16 is small for the traveling distance of the light beam, and the decrease in the light energy is small. Therefore, the light beam can travel to the end portions of the light diffusing and transmitting plate 16 and the plane reflecting plate 17 in the X-axis direction sufficiently φ to emit uniform illumination light from the entire emitting surface. Further, the flat reflecting plate 17 may be disposed in parallel with the light diffusing and transmitting plate 16 . Embodiment 2 Fig. 4 shows the structure of a reflector for a light source of Example 2. In the light source reflector 10 of the first embodiment shown in Fig. 1, the first reflecting portion 2 1 having the reflecting surface 21a 0 including the spherical surface of the rotating body of the perfect circle is used. Instead of the first reflecting portion 1 1 having the reflecting surface 11 a formed of a spheroid. The second reflecting portion 22 is connected to the front end of the first reflecting portion 21 to have a conical reflecting surface 22a similar to the second reflecting portion 12 of the first embodiment. Further, an opening portion 23 is formed at an end portion of the first reflecting portion 21 in the X-axis direction for inserting a light source bulb (not shown). If the light source bulb is inserted into the opening portion 2 of the first reflecting portion 2 1 of the light source reflector 20, similarly to the light source device 15 shown in Fig. 2, the light emitted from the light emitting portion of the light source bulb can be emitted. Transformed into a small beam angle of -11 - 1294507 beam travel. When the light source device 3 using the light source reflector 2 is mounted, instead of the light source device 15 of the illumination device shown in Fig. 3, uniform illumination light can be emitted from the entire emission surface. Further, it is preferable that the second reflecting portion 22 captures at least 2% of the entire light beam as a task of forming a smaller beam angle. Preferably, the length of the second reflecting portion 22 in the X-axis direction is 10% or more of the length of the first reflecting portion 21 in the X-axis direction. Embodiment 3 Fig. 5 shows the structure of a reflector for a light source of Embodiment 3. The light source reflector 25 is replaced by a first reflecting portion 26 of the light source reflector 10 of the first embodiment shown in Fig. 1 using a reflecting surface 26a having a rotating body that rotates the parabolic axis around its axis. The first reflecting portion 11 has a reflecting surface 11a composed of a spheroid. The second reflecting portion 27 having the conical reflecting surface 27a is connected to the front end of the first reflecting portion 26. Further, an opening portion 28 is formed in an end portion of the first reflecting portion 26 in the X-axis direction for inserting a light source bulb (not shown). When the light source bulb is inserted into the opening portion 28 of the first reflecting portion 26 of the light source reflector 25, a light beam for causing all of the light to enter the narrower or smaller light receiving portion can be formed. If the light source device using the light source reflector 25 is installed and replaced with the light source device 丨5 of the illuminating device shown in Fig. 3, uniform illumination light can be emitted from the entire exit surface. Further, the second reflecting portion 27 preferably captures at least 2% of at least all of the light beams as a task of forming a smaller beam angle. It is preferable that the length of the -12 to 1294507 of the second reflecting portion 27 in the X-axis direction has '10% or more of the length of the first reflecting portion 26 in the X-axis direction. Fourth Embodiment Fig. 6 is a view showing the structure of a reflector for a light source according to a fourth embodiment. The formation of the light source reflector 30 includes: the first reflection portion 3 1 is elongated in the Y-axis direction; and the pair of second reflection portions 3 2 are connected to the X-axis of one of the first reflection portions 31, respectively. The end of the direction is elongated in the Y-axis direction. The first reflecting portion 31 has a reflecting surface 31a, and the cross-sectional shape of the XZ plane is opened to form an ellipse in the Xφ-axis direction, and the pair of second reflecting portions 3 2 have a reflecting surface 32a to form a cross-sectional shape of the XZ plane. In the X-axis direction, they are opened to each other in an inclined shape and become a straight line. A light source device in which the light source bulb 3 3 is disposed to extend in the Y-axis direction is formed inside the light source reflector 30. The light beam emitted from the light source bulb 3 3 is directly reflected by the reflecting surface 31a of the first reflecting portion 31 and the reflecting surface 3 2 a of the second reflecting portion 3 2, and travels as a beam of the small beam angle. φ If a light source device using the light source reflector 30 is used, instead of the light source device 丨5 of the illumination device shown in Fig. 3, uniform illumination light can be emitted from the entire exit surface. Preferably, the second reflecting portion 3 2 captures at least 2% of all the light beams, and serves to form a smaller beam angle. It is preferable that the length of the second reflection portion 32 in the X-axis direction has 1% or more of the length of the first reflection portion 31 in the X-axis direction, and the reflection surface 3 1 a of the first reflection portion 31 has the XZ surface. The cross-sectional shape is formed as an ellipse that is open in the X-axis direction, but is not limited thereto, and -13 - 1294507 may be, for example, an arc having a reflecting surface such that the cross-sectional shape of the kneading surface is opened to face the X-axis direction (a perfect circle) or The parabolic person can get the same effect. Embodiment 5 Fig. 7 shows the structure of a reflector for a light source of Example 5. The light source reflector 40 is constructed as in the fourth embodiment shown in Fig. 6, and the two light sources that are elongated in the γ-axis direction and open toward the X are connected back to back with the reflectors toward each other. Both sides of the X-axis are open. That is, the first reflection portions 5 1 and 6 1 which are elongated in the z-axis direction are connected to the second reflection in the +Χ-axis direction and the -X-axis direction, respectively, and in the z-axis direction. The portion 5 2 is connected to the end portion of the first reflecting portion 5 1 in the +X-axis direction, and the second reflecting portion 6 2 that is elongated in the z-axis direction is coupled to the end portion of the first reflecting portion 6 1 in the -X-axis direction. . The first reflecting portions 5 1 and 6 1 have reflecting surfaces 5 1 a and 6 1 a, respectively, and the cross-sectional shape of the XZ plane is formed to be open to an ellipse in the +χ-axis direction and the _x-axis direction. Further, the pair of second reflecting portions 52 have the reflecting surface 52a, and the cross-sectional shape of the XZ plane is formed so as to be open to the +X-axis direction so as to be inclined. The second reflecting portion 62 having a pair of straight lines has a reflecting surface 62a. The cross-sectional shape of the XZ plane is formed so as to be inclined to open to each other in the -X-axis direction, and to form a straight line. In the connecting portion between the first reflecting portions 5 1 and 61, an opening portion 4 1 penetrating in the X-axis direction is formed, and the light source bulb 42 elongated in the γ-axis direction is disposed in the opening portion 4 1 to form a light source device. The light beam is emitted from the light source bulb 42 toward the 360° direction of the XZ plane, and the beam of the light beam toward the +χ axis direction is directly or by the reflection surface 51a of the first reflection portion 51 and The reflection surface 52a of the reflection portion 52 is reflected and travels as a light beam having a small beam angle. On the other hand, the light beam directed in the -X-axis direction is directly reflected by the reflecting surface 61a of the first reflecting portion 61 and the reflecting surface 62a of the second reflecting portion 62, and travels as a beam having a small beam angle. According to this aspect, when the light source reflector 40 of the fifth embodiment is used, a light beam which is divided into two in the +X axis direction and the -X axis direction can be obtained from one light source bulb 42. Therefore, if the lighting fixture 18 shown in FIG. 3 is disposed in front of the +X-axis direction of the light source reflector 40 and the front of the -X axis direction, one light source bulb 42 can be used, and two illuminations can be used at the same time. The appliance 18 emits uniform illumination light. In this case, as shown in Fig. 8, if the first reflecting portions 5 1 and 6 1 of the light source reflector 40 are placed, the lighting fixtures are disposed via the planar reflecting plates 53 and 63 arranged obliquely, respectively. At 18 o'clock, the two lighting fixtures 18 can be arranged to illuminate in parallel with each other. Further, by using the light source reflector 40 of the fifth embodiment, after the shape is divided into two light beams, a light splitter composed of a reflecting plate for bending the respective light beams as shown in Fig. 9 is further used. When 4 is divided into two, the light beam divided into four light beams can be obtained from one light source bulb 42, and illumination can be performed from four lighting fixtures 18. In the reflector for light source 40 of the fifth embodiment, the reflection surface 5 1 a of the first reflection portion 5 1 and the reflection surface 61 a of the first reflection portion 6 1 form an ellipse in the cross-sectional shape of the XZ plane, but Not limited to this, for example, the same effect can be obtained by forming a circular arc (a perfect circle) or a parabola -15- Ϊ 294507 ' for a cross-sectional shape of the XZ plane with a reflecting surface. In the reflector for a light source according to the first to fifth embodiments, a reflection film having a multilayer structure is formed on the reflection surface of the first R body and the second reflection portion, and the reflection characteristic has a wavelength distribution, which can be promoted. The reflection of visible light can suppress the reflection of heat rays. In this way, the axial heat can be reduced, for example, a lighting device suitable for plant cultivation can be realized. Further, conversely, the reflection of the heat ray is promoted, and the reflection of the visible light is suppressed. By using the reflection surface in this manner, it is possible to use the illuminating heat. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing the structure of a reflector for a light source according to Embodiment 1 of the present invention. Fig. 2 is a cross-sectional view showing a light source device for a reflector for a light source according to Embodiment 1 of the present invention. Fig. 3 is a cross-sectional view showing an illuminating device using the light source device of Fig. 2. Fig. 4 is a cross-sectional view showing a reflector for a light source of the second embodiment. Fig. 5 is a cross-sectional view showing a reflector for a light source of the third embodiment. FIG. 6 is a perspective view showing the implementation. Fig. 7 is a reflector for a light source. Fig. 7 is a cross-sectional view showing a reflector for a light source of Embodiment 5-16- 1294507. Fig. 8 is a schematic view showing a lighting device for a reflector. It is used to indicate that the light source of the fifth embodiment is used. Fig. 9 is a perspective view of the optical splitter. The figure used to show a variation of the fifth embodiment is a perspective view showing the lighting device. Figure 11 shows the direction of travel of the light beam within the illumination device. [Description of main component symbols] 1 0, 20, 3 0, 40, 50 Reflector for light source 1 1, 2 1, 26, 31, 51, 61 First reflecting portion 11a, 12a, 21a, 22a Reflecting surface 26a, 27a 31a, 32a reflecting surface 51a, 52a, 61a, 62a reflecting surface 1 2, 22, 27, 3 2, 5 2, 62 second reflecting portion 1 3, 23, 2 8, 4 1 opening portion 14, 33, 42 Light source bulb 15 Light source device 16 Light diffusing through plate 17, 53, 63 Planar reflector 18 Lighting fixture 43 Light splitter-17-