201213855 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種 ^ 線被善加重複利用，進而二糸統’尤指一種可令未激發光 【先前技術】 提高光源之利用效率之光學系統。 光學引擎係投影設備 光源、光均勻模組以及光核心技術，而光學引擎一般包括 光均勻模組之作用係將光桌其中，光源之作用係產生光束， 束轉換為影像光束。 岣句化，而光閥之作用則係將光 前述光源若係採用包含 粉之發光二極體，係指將^螢光粉之光源’例如具有螢光 螢光粉再次激發後，所發極體本身離生之光，其被 發光二極體本身所產生之:之激發光加以利用。然而，由於 激發之光紐被善;，、=法皆被螢光粉所激發’未被 決之技術課題。 w、了光源之浪費，此為仍待解 【發明内容】 點之實現方式與依據。種枝錢，以作為改善上述缺 效益’提供W經濟 趣—可令__善加 ，發明之再-目的在於，提供―可提高光源之利用效率 之光學糸統。 依據本發明之上述目的，本發明提供—種光學系統，係 包括至少—包含有—榮光粉之第-發光s件，該第-發光元 201213855 •‘ · j 件内部產生一未激發光線，該第一發光元件之被該螢光粉所 激發之=已激發光線具有一第一顏色、一反射該未激發光線 =反件以及一僅令具有該第一顏色之該已激發光線通 光元件’該分光元件之—侧設置有該第—發光元件及 ^呈順，且該第—發光元件、該分光元件及該反射元件 =1向依序對應設置;本發明之光學系統只需簡易 盖t重分光元件及該反射元件’即可令未激發光線被 光學系統之成本負擔低而符合經濟效益。 效有Μ對本發明之技術⑽及所達到之功 瞭解齡謹佐以較佳之實施例及配合詳 【實施方式】 以下將參照相關圖式，說明本發明 例，為使便於理解，下述實施例中之:之交佳實: 號標示來說明。 目问凡件係以相同之符 首先’凊參閱第1圖所示，置你緣_ 之第-較佳實施例之示意圖。請再參;;之光學1 示本發明之料_之卜較其1 圖。本發明之光學系統係包括至少—光予路徑不1 —% jr AAr 1 Λ 咕 务光元件 ll、J_ 少 元第三發光元件13、-第-I光 ;!。卜-第二聚光元件22、-反射元件3以及ΐί元 該第一發光元件11、該第二發光 光元件13分別具有-出光面ii!、出=牛以及該第三啦 該第一聚光元件21係對應設置於該第 γ面131 光面⑴處。該第二發光元件12與^發=件^之， 向並排設置，且該第二發光元件 201213855 \ > 第光之該出光面131係平行朝相同方向。該第 於該第二發光元件12之該出光面 /X —卷光7〇件13之該出光面131處。 相異於係為—人光面41，該分光元件4 件4係為例如_分光鏡絲42，且該分光元 21 3 ί；ίί；ίί：! 係為該入光面41之該側，且哕第心平；:刀光兀件4之 發光元林"η山丄 苐一聚光兀件21位於該第- 係呈，針方向i序Ϊ應設1置遠分先7"件4及該反射元件3 刖述該第二發光元件12、該第三發 12 之該㈣\二-二2 該分光元件4之該出光面42之間。之及出先面⑶與 ^此f特別制，前賴第—發光元件u包 二t第一發光元件12以及該第三發光元件13皆传、ϋίΪ 地包含有螢光粉(圖中未示）或不包含發光 白擇性 兀件η或該第二發光元件12或該第& μ ^光 如發光二極體或雷射。該第-發光元件u 係為例 未，U ’接著，前述之未激發光線Α ί 元件η内部之螢光粉(圖中再ϋ第-發光 被釋放於該第—發光元件u之外。該^ =發光線β而 發之已激發光線Β具有一第一顏色，該第一y i牛u所激 =亥第二發光元件12所發出之光線c具有為=綠 該弟二顏色係為例如紅色、該第三發光元件13戶=光 201213855 線D具有一第三顏色，該第三顏色係為例如藍色。除此之 外，前述該分光元件4係僅令具有該第一顏色之已激發光線 B通過，且該分光元件4係令未激發光線A、具有該第二顏 色之光線C、具有該第三顏色之光線D被反射。 前述光線C及光線D係選擇性地為受激發光線或不受 激發光線。當該第二發光元件12包含有螢光粉時，該光線 C為受激發光線，當該第二發光元件12不包含有螢光粉時， 該光線C為不受激發光線。當該第三發光元件13包含有螢 光粉時，該光線D為受激發光線，當該第三發光元件13不 包含有螢光粉時，該光線D為不受激發光線。 請續參閱第2圖所示，使用時，該第一發光元件11内 部所產生之未激發光線A，先被該第一發光元件11内部所 包含之螢光粉（圖中未示）激發成為具有該第一顏色之已激發 光線B。 接著，具有該第一顏色之已激發光線B以及仍未被激 發之剩餘未激發光線A，皆被釋放於該第一發光元件11之 外，通過該第一聚光元件21而被集中匯聚後，再皆朝向該 分光元件4之該入光面41行進。同樣地，具有該第二顏色 之光線C被釋放於該第二發光元件12之外、具有該第三顏 色之光線D被釋放於該第三發光元件13之外，通過該第二 聚光元件22而被集中匯聚後，再皆朝向該分光元件4之該 出光面42行進。 當具有該第一顏色之已激發光線B、仍未被激發之剩餘 未激發光線A，行進至該入光面41時，該分光元件4令具 有該第一顏色之已激發光線B通過，且該分光元件4將仍未 被激發之剩餘未激發光線A加以反射。繼之，被反射後之剩 餘未激發光線A入射該反射元件3，並被該反射元件3加以 201213855 反射。爾後未激發光線A再次入射至該分光元件4，該分光 元件4將此剩餘未激發光線a再次加以反射。前述被再次反 射後之剩餘未激發光線A再入射該第一發光元件11，被該 第一發光元件11内部所包含之螢光粉（圖中未示）再次激發 成為具有該第一顏色之已激發光線B ’以供該光學系統再次 利用。 另一方面，當具有該第二顏色之光線C、具有該第三顏 色之光線D，行進至該出光面42時，該分光元件4將具有 該第二顏色之光線C、具有該第三顏色之光線D加以反射。 繼之’被反射後之具有該第二顏色之光線C、具有該第三顏 色之光線D，與通過該分光元件4之具有該第一顏色之已激 發光線B彼此匯合，以供該光學系統加以利用。 請參閱第3圖所示，其係繪示本發明之光學系統之第二 較佳實施例之示意圖。請再參閱第4圖所示’其係繪示本發 明之光學系統之第二較佳實施例之光學路徑示意圖。本發明 之光學系統係包括至少一第一發光元件11、至少一第二發光 元件14、至少一第三發光元件13、一第一聚光元件21、一 第二聚光元件22、一第三聚光元件23、一第一反射元件5、 —第二反射元件6以及一第一分光元件7、一第二分光元件 R 〇 該第一發光元件11、該第二發光元件14以及該第三發 光元件13分別具有一出光面111、出光面141、出光面131。 該第一聚光元件21係對應設置於該第一發光元件11之該出 光面111處。而與上述第一較佳實施例之不同處在於，該第 二聚光元件22係對應設置於該第二發光元件14之該出光面 141處、該第三聚光元件23係對應設置於該第三發光元件 13之該出光面131處。該第二發光元件Η與該第三發光元 201213855201213855 VI. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a circuit that is well reused, and in turn, a dioxic system, especially one that can cause unexcited light [prior art] to improve the utilization efficiency of the light source Optical system. The optical engine is a projection device, a light source, a light uniform module, and an optical core technology, and the optical engine generally includes a function of a light uniform module. The light source is used to generate a light beam, and the beam is converted into an image beam. Hyphenation, and the function of the light valve is to use the light-emitting diode containing the powder as the light source, which means that the light source of the fluorescent powder is excited again after the fluorescent powder, for example, The body itself is separated from the light, which is generated by the light-emitting diode itself: the excitation light is utilized. However, because the stimulating light is good, the = method is inspired by the fluorescent powder's unresolved technical issue. w, the waste of the light source, this is still to be solved [Summary] The implementation and basis of the point. Planting money to improve the above-mentioned deficiencies 'provides economic interest — can make __ good, and reinvent the invention - to provide an optical system that can improve the efficiency of light source utilization. In accordance with the above objects of the present invention, the present invention provides an optical system including at least a first light-emitting element including a glory powder, the first light-emitting element 201213855 • a j-element internally generating an unexcited light. The first light-emitting element is excited by the phosphor powder = the excited light has a first color, a reflected unexcited light = a reverse member, and an excited light-passing light-emitting element having only the first color The first light-emitting element is disposed on the side of the light-splitting element, and the first light-emitting element, the light-splitting element, and the reflective element are sequentially disposed correspondingly; the optical system of the present invention requires only a simple cover The heavy splitting element and the reflective element can make the unexcited light cost-effective by the optical system and cost-effective. The present invention will be described with reference to the related drawings, and the following embodiments will be described with reference to the accompanying drawings. In the middle: the good news: the number is marked to explain. Imagine that the parts are the same. First, please refer to Figure 1, which shows the schematic of the preferred embodiment. Please refer to;; Optical 1 shows the material of the present invention. The optical system of the present invention includes at least a light path not 1 - % jr AAr 1 Λ 务 light element ll, J_ minority third light element 13, - -I light; The second concentrating element 22, the reflective element 3, and the illuminating element 13 have a light-emitting surface ii!, an output = a cow, and a third one. The optical element 21 is disposed corresponding to the light surface (1) of the γ-plane 131. The second light-emitting elements 12 and the light-emitting elements are arranged side by side, and the second light-emitting elements 201213855 \ > the light-emitting surface 131 of the first light are parallel in the same direction. The light exiting surface 131 of the light emitting surface /X-rolling light 7 of the second light emitting element 12 is at the light emitting surface 131. Different from the human light surface 41, the light splitting element 4 is 4, for example, a _beam splitter wire 42, and the splitter 21 3 ί; ίί; ίί:! is the side of the light incident surface 41, And the first heart; the illuminating element of the knife 兀 4 & & η η η η η η η η η η η η η η η η η η η η η η η η η η η η η η η η η η η η η η η η η η η And the reflective element 3 is described between the second light-emitting element 12 and the light-emitting surface 42 of the (4)/two-two of the third light-emitting element 4 of the third light-emitting element 4. And the first surface (3) and the special surface, the first light-emitting element u package two t first light-emitting element 12 and the third light-emitting element 13 are both transmitted and fluorinated (including not shown) Or not including the illuminating white element η or the second illuminating element 12 or the illuminating diode or laser. The first light-emitting element u is an example, and U' is followed by the fluorescent powder inside the unexcited light ray η element (in the figure, the first light-emitting light is released outside the first light-emitting element u. ^ = the emitted light β emitted by the illuminating line β has a first color, and the light ray c emitted by the first illuminating element 12 has a color = green and the second color is, for example, red The third light-emitting element 13 is light=201213855. The line D has a third color, and the third color is, for example, blue. In addition, the foregoing light-splitting element 4 is only excited to have the first color. The light B passes, and the light splitting element 4 causes the unexcited light A, the light C having the second color, and the light D having the third color to be reflected. The light C and the light D are selectively excited light. Or the light is not excited. When the second light-emitting element 12 includes the fluorescent powder, the light C is an excited light, and when the second light-emitting element 12 does not contain the fluorescent powder, the light C is not excited. When the third light-emitting element 13 contains phosphor powder, the light D is subjected to Exciting light, when the third light-emitting element 13 does not contain the fluorescent powder, the light D is unexcited light. Please refer to FIG. 2, when used, the inside of the first light-emitting element 11 is not generated. The excitation light A is first excited by the phosphor (not shown) contained in the first light-emitting element 11 to become the excited light B having the first color. Next, the excited light B having the first color And the remaining unexcited light A that has not been excited is released outside the first light-emitting element 11 , and is concentrated and concentrated by the first light-collecting element 21 , and then the light is directed toward the light-splitting element 4 . The surface 41 travels. Similarly, the light C having the second color is released outside the second light-emitting element 12, and the light D having the third color is released outside the third light-emitting element 13 After the two concentrating elements 22 are concentrated and concentrated, they all travel toward the light-emitting surface 42 of the light-splitting element 4. When the excited light B having the first color and the remaining unexcited light A that is still not excited are traveled to When the light incident surface 41 is used, the light splitting element 4, the excited light B having the first color is passed, and the spectroscopic element 4 reflects the remaining unexcited light A that has not been excited. Then, the remaining unexcited light A after being reflected is incident on the reflective element 3. And reflected by the reflection element 3 by 201213855. Then, the unexcited light A is again incident on the spectroscopic element 4, and the spectroscopic element 4 reflects the remaining unexcited light a again. The remaining unexcited light A after being reflected again The first light-emitting element 11 is incident on the first light-emitting element 11 and is excited by the phosphor (not shown) contained in the first light-emitting element 11 to be excited light B′ having the first color for reuse by the optical system. On the other hand, when the light C having the second color and the light D having the third color travel to the light-emitting surface 42, the light-splitting element 4 will have the light C of the second color and have the third The light of the color D is reflected. The light C having the second color, the light D having the third color, and the excited light B having the first color passing through the light splitting element 4 are merged with each other for the optical system. Use it. Referring to Figure 3, there is shown a schematic view of a second preferred embodiment of the optical system of the present invention. Referring to Figure 4, there is shown a schematic diagram of an optical path of a second preferred embodiment of the optical system of the present invention. The optical system of the present invention includes at least one first light emitting element 11, at least one second light emitting element 14, at least one third light emitting element 13, a first light collecting element 21, a second light collecting element 22, and a third a concentrating element 23, a first reflective element 5, a second reflective element 6 and a first beam splitting element 7, a second beam splitting element R, the first illuminating element 11, the second illuminating element 14, and the third The light-emitting elements 13 respectively have a light-emitting surface 111, a light-emitting surface 141, and a light-emitting surface 131. The first concentrating element 21 is disposed corresponding to the light emitting surface 111 of the first illuminating element 11. The difference between the second concentrating element 22 and the illuminating surface 141 of the second illuminating element 14 is corresponding to the first illuminating element 23. The light-emitting surface 131 of the third light-emitting element 13 is located. The second illuminating element Η and the third illuminating element 201213855
1 · I 件13係橫向並排設置，且該第二發光元件i4 係與該第三發光元件13之該出光面131 J第-分光科7之-側係為—人光面==方= 先τΜ牛7相異於該入光面71之另一 面j : = 係為例如一分光鏡片。而與上ΐ第:較Ϊ 貫施例之不同處在於，該第二分光元件8之— f二該第二分光元件8相異於該人光面8ι ^ 片出先面82,同樣地，該第二分光元件8係為例如一分光鏡 及私前f該第一發光元件11、該第-聚光元件21及哕第 第-分光元件7之係為該it 之該出光面第:發光元件11 且今笛一八上-1弟刀先兀件7之该入光面71之間。 =I先70件11、該第一分光元件7及 5係呈順時針方向依序對應設置。 反射以牛 光元：;、4上j ^ 一較佳實施例之不同處在於，前述該第二發 第二聚光元件22係對應設置於該第-分光i 位於該第IS光：72之該另一側’且該第二聚光元件22 之該出光^之兀門件1 而出光面141與該第—分光元件7 與該第—分光日而4第二》光兀件8之該人光面81係 述該第n元彳φ 之㈣絲72彼此對應平行設置。前 第二分光‘二件Μ、該第二聚光元件22係對應設置於該 光元件13證^係為該入光面81之該側。前述該第三發 件8之係為；光元件23係對應設置於該第二分光元 位於該第二先 之該另一侧，且該第三聚光元件23 之該出光:L光％件13之該出光面131與該第二分光元件8 之間。該第二反射元件6與該第一反射元件5 201213855 係橫向平行設置，且該第二反射元件6係對應設置於該第二 分光元件8之係為該入光面81之該侧。 在此需特別說明，前述該第一發光元件11、該第二發光 元件14包含有螢光粉，該第三發光元件13係選擇性地包含 有營光粉（圖中未示）或不包含螢光粉，而該第一發光元件11 或該第二發光元件14或該第三發光元件13係為例如發光二 極體或雷射。該第一發光元件11、該第二發光元件14先於 其内部產生未激發光線A，接著，前述之未激發光線A再分 別被該第一發光元件11、該第二發光元件14内部之螢光粉 •(圖中未示）激發成為已激發光線B、已激發光線E而被釋放 於該第一發光元件11、該第二發光元件14之外。該第一發 光元件11所激發之已激發光線B具有一第一顏色，該第一 顏色係為例如綠色、該第二發光元件12所激發之已激發光 線E具有一第二顏色，該第二顏色係為例如紅色、該第三發 光元件13所發出之光線D具有一第三顏色，該第三顏色係 為例如藍色。 前述光線D係選擇性地為受激發光線或不受激發光線。 當該第三發光元件13包含有螢光粉時，該光線D為受激發 ^ 光線，當該第三發光元件13不包含有螢光粉時，該光線D 為不受激發光線。 在此需特別說明，前述該第一分光元件7係僅令具有該 第一顏色之已激發光線B通過，且該第一分光元件7係令未 激發光線A、具有該第二顏色之已激發光線E被反射。而與 上述第一較佳實施例之不同處在於，前述該第二分光元件8 係僅令具有該第一顏色之已激發光線B、具有該第二顏色之 已激發光線E通過，且該第二分光元件8係令未激發光線 A、具有該第三顏色之光線D被反射。 201213855 請再參閱第4圖所示，其係繪示本發明之光學系統之第 二較佳實施例之光學路徑示意圖。使用時，該第一發光元件 11内部、該第二發光元件14内部所產生之未激發光線A， 先分別被該第一發光元件11内部、該第二發光元件12内部 所包含之螢光粉（圖中未示）激發成為具有該第一顏色之已激 發光線B、具有該第二顏色之已激發光線E。 接著’具有該第一顏色之已激發光線B以及仍未被激 發之剩餘未激發光線A，皆被釋放於該第一發光元件11之 外，通過該第一聚光元件21而被集中匯聚後，再皆朝向該 第一分光元件7之該入光面71行進。同樣地，具有該第二 顏色之已激發光線E以及仍未被激發之剩餘未激發光線a， 皆被釋放於該第二發光元件14之外，通過該第二聚光元件 22而被集中匯聚後，再皆朝向該第一分光元件7之該出光面 72行進。同樣地，具有該第三顏色之光線D被釋放於該第 二發光元件13之外，通過該第三聚光元件23而被集中匯聚 後’再皆朝向s亥第一分光元件8之該出光面82行進。 當具有該第一顏色之已激發光線B、仍未被激發之剩餘 未激發光線A’行進至該第一分光元件7之該入光面71時， 忒第一分光元件7令具有該第一顏色之已激發光線b通過， 且該第-分光7L件7將仍未被激發之剩餘未激發光線A加以 反射。繼之，被反射後之剩餘未激發光線A入射該第一反射 7L件5 ’並被&第-反射件5加以反射。爾後未激發光線 A再次入射至該第-分光元件7’該第—分光元件7將此剩 餘未激發光線A再次加以反射。前述被再次反射後之剩餘未 激發光線A再入射該第一發光元件u 第一 u内部所包含之榮光粉(圖中未示)再次激發：為=該: —顏色之已激發光線B ’以供該光學系統再次利用。 201213855 同理地，當具有該第二顏色之已激發光線E、仍未被激 發之剩餘未激發光線A,行進至該第一分光元件7之該出光 面72時，5玄第一分光元件7將具有該第二顏色之已激發光 線E、仍未被激發之剩餘未激發光線A加以反射。繼之，被1 · I pieces 13 are arranged side by side in the lateral direction, and the second light-emitting element i4 is connected to the light-emitting surface 131 J of the third light-emitting element 13 - the side of the first-light-lighting section 7 is - the human face == square = first The τ Μ 7 is different from the other side of the illuminating surface 71 j : = is, for example, a spectroscopic lens. The difference from the upper ΐ : : : : : : : : : : : : 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二The second beam splitting element 8 is, for example, a beam splitter and the first light emitting element 11 , the first light collecting element 21 and the first light splitting element 7 are the light emitting surface of the current: the light emitting element 11 And now the flute is one of the eight knives and the first knives of the knives are between the light planes 71. =I first 70 pieces 11. The first beam splitting elements 7 and 5 are arranged in a clockwise direction. The difference is that the second light concentrating element 22 is disposed corresponding to the first light splitting element i located at the first IS light: 72. a light beam 141 and the first light splitting element 7 and the first light splitting element 7 and the second light emitting element 8 of the second light collecting element 22 The surface 81 is such that the (four) wires 72 of the n-th 彳 φ are arranged in parallel with each other. The first second splitting light ‘two Μ Μ and the second concentrating light element 22 are correspondingly disposed on the side of the light incident surface 81 of the optical component 13 . The third hair piece 8 is configured to be disposed on the other side of the second light splitting element, and the light emitting light of the third light collecting element 23: L light % The light-emitting surface 131 of the 13 is between the second light-splitting element 8. The second reflective element 6 is disposed in a lateral direction parallel to the first reflective element 5 201213855, and the second reflective element 6 is disposed on the side of the second light splitting element 8 which is the light incident surface 81. Specifically, the first light-emitting element 11 and the second light-emitting element 14 include phosphor powder, and the third light-emitting element 13 selectively includes camping powder (not shown) or does not include Fluorescent powder, and the first light-emitting element 11 or the second light-emitting element 14 or the third light-emitting element 13 is, for example, a light-emitting diode or a laser. The first light-emitting element 11 and the second light-emitting element 14 generate unexcited light A first before the first light-emitting element 11 and the second light-emitting element 14 respectively. The light powder (not shown) is excited into the excited light B and the excited light E and is released outside the first light-emitting element 11 and the second light-emitting element 14. The excited light B excited by the first light-emitting element 11 has a first color, the first color is, for example, green, and the excited light E excited by the second light-emitting element 12 has a second color, the second The color is, for example, red, and the light D emitted by the third light-emitting element 13 has a third color, which is, for example, blue. The aforementioned light D is selectively excited or unexcited. When the third light-emitting element 13 includes the fluorescent powder, the light D is an excited light, and when the third light-emitting element 13 does not contain the fluorescent powder, the light D is unexcited light. It should be noted that the first light splitting element 7 only passes the excited light B having the first color, and the first light splitting element 7 causes the unexcited light A to be excited. Light E is reflected. The difference from the first preferred embodiment is that the second beam splitting element 8 passes only the excited light B having the first color, the excited light E having the second color, and the first The dichotomy element 8 causes the unexcited light A to be reflected, and the light D having the third color is reflected. 201213855 Please refer to FIG. 4 again, which is a schematic diagram showing the optical path of the second preferred embodiment of the optical system of the present invention. In use, the unexcited light A generated inside the first light-emitting element 11 and inside the second light-emitting element 14 is firstly used by the inside of the first light-emitting element 11 and the phosphor powder contained inside the second light-emitting element 12, respectively. (not shown) is excited into the excited light B having the first color and the excited light E having the second color. Then, the 'excited light B having the first color and the remaining unexcited light A still being unexcited are released outside the first light-emitting element 11 and concentrated by the first light-collecting element 21 Then, both of them travel toward the light incident surface 71 of the first beam splitting element 7. Similarly, the excited light E having the second color and the remaining unexcited light a still unexcited are released outside the second light-emitting element 14 and concentrated by the second light-collecting element 22. Thereafter, both of them travel toward the light exit surface 72 of the first beam splitting element 7. Similarly, the light D having the third color is released outside the second light-emitting element 13, and is concentrated and concentrated by the third light-collecting element 23, and then the light is emitted toward the first light-splitting element 8 Face 82 travels. When the remaining unexcited light A' having the first color of the excited light B and still not excited is advanced to the light incident surface 71 of the first beam splitting element 7, the first light splitting element 7 has the first The excited light b of the color passes, and the first-split 7L 7 reflects the remaining unexcited light A that is still unexcited. Then, the remaining unexcited light A after being reflected is incident on the first reflection 7L member 5' and is reflected by the & first reflection member 5. Then, the unexcited light A is again incident on the first beam splitting element 7', and the first beam splitting element 7 reflects the remaining unexcited light A again. The remaining unexcited light A after being reflected again is again incident on the first light-emitting element u. The glory powder (not shown) contained inside the first u is excited again: ==:: the color of the excited light B' The optical system is reused. 201213855 Similarly, when the excited light ray E having the second color and the remaining unexcited light A that is still not excited are advanced to the light-emitting surface 72 of the first light-splitting element 7, the 5-first first light-splitting element 7 The excited unexcited light E having the second color and the remaining unexcited light A still unexcited are reflected. Followed by
反射後具有該第二顏色之已激發光線E、剩餘未激發光線A =射該第二分光元件8之該入光面81，該第二分光元件8 令具有s玄第二顏色之已激發光線E通過，且該第二分光元件 8將仍未被激發之剩餘未激發光線a加以反射。繼之，被反 射後之剩餘未激發光線A入射該第二反射元件6,並被該第 ，反射元件6加以反射。爾後未激發光線八再次入射至該第 =分光元件8’該第二分光元件8將此剩餘未激發光線a再 次加以反射。前述被再次反射後之剩餘未激發光線A再入射 該第一分光元件7，並被該第一分光元件7加以反射。前述 被再次反射後之剩餘未激發光線A再入射該第二發光元件 14,被該第二發光元件14内部所包含之螢光粉（圖中未示) 再次激發成為具有該第二顏色之已激發光線E，以供該光學 系統再次利用。 、另一方面，畲具有該第三顏色之光線進至該第二分 ，元件8之该出光面82時，該第二分光元件8將具有該第 —顏色之光線D加以反射。繼之，被反射後之具有該第三顏 色之光線尸，與通過該第一分光元件7及該第二分光元件8 之具有該第-顏色之已激發光線B、通過該第二分光元件8 之具有該第二顏色之已激發光線E彼此匯合，以供該光學系 統加以利用。 請參閱第5圖所示，其鱗示本發明之鮮线之第三 較佳實施例之示意圖。請再參閲第6圖所示，其係繪示本發 明之光學祕之第三較佳實關之光學路徑示意圖。本發明 i 201213855 之光學系統係包括至少一笸_ ‘ 21、一分光元件g。 x元件n、一第一聚光元件 該第一發光元件U具有— 21係對應設置於該第一發光元^面。該第一聚光元件 分光元件9之-側係為— 1之5亥出光面111處。該 入光面之另—側係為—出先光面光元件9相異於該 Π、該第一聚光元件21係對廊。剛述該第一發光元件 該入光面91之該側，且該第於^分光元件9之係為 元件η之㈣絲⑴21位難第一發光 ，Β兮八土 - π 逆刀先疋件9之該入光面91之 間’且齡U件9與該第—發光轉 1之 在此需特別說明，前述該第— 人=° 楚一八止-从 午 係為例如發光二極體或雷射。嗲 第i光το件11先於其㈣產生未激發 A 二 述之未激發光線A再被該第，剛 中夫千先凡件11内部之螢光粉（圖 ”"成為已激發光線B而被釋放於該第-發光元件 11，外。該第厂發光元件n所激發之已激發光線B具有2 、…聽n顏色係為例如綠色。除此之外，前述該分 光兀件9係僅令具有該第—顏色之已激發光線B通過，且今 分光元件9係令未激發光線A被反射。 ^ 請續參閱第6圖所示，使用時，該第一發光元件u内部 所產生之未激發光線A，先被該第一發光元件〖1内部所包 含之螢光粉（圖中未示）激發成為具有該第一顏色之已激發光 。接著，具有該第一顏色之已激發光線B以及仍未被激 發之剩餘未激發光線A，皆被釋放於該第一發光元件n之 外，通過該第一聚光元件21而被集中匯聚後，再皆朝向該 分光元件9之該入光面91行進。 當具有該第一顏色之已激發光線B、仍未被激發之剩餘 12 201213855 未激發光線A，行進至該入光面91時，該分光元件9令具 有該第一顏色之已激發光線B通過，且該分光元件9將仍未 被激發之剩餘未激發光線A加以反射。繼之，被反射後之剩 餘未激發光線A再次依序入射該第一聚光元件21及該第一 發光元件11。前述被再次反射後之剩餘未激發光線A再入 射該第一發光元件11後，被該第一發光元件11内部所包含 之螢光粉（圖中未示）再次激發成為具有該第一顏色之已激發 光線B ’以供該光學糸統再次利用。 請參閱第7圖所示，其係繪示本發明之光學系統之第四 • 較佳實施例之示意圖。請再參閱第8圖所示，其係繪示本發 明之光學系統之第四較佳實施例之光學路徑示意圖。本發明 之光學系統係包括至少一第一發光元件11、至少一第二發光 元件14、至少一第三發光元件24、一第一聚光元件21、一 第二聚光元件22、一第三聚光元件23、一第一分光元件31、 一第二分光元件51、一第三分光元件61以及一第四分光元 件10。 該第一發光元件11、該第二發光元件14以及該第三發 光元件24分別具有一出光面111、出光面141、出光面241。 * 該第一聚光元件21係對應設置於該第一發光元件11之該出 光面111處。該第二聚光元件22係對應設置於該第二發光 元件14之該出光面141處、該第三聚光元件23係對應設置 於該第三發光元件24之該出光面241處。 該第一分光元件31之一側係為一入光面311，該第一分 光元件31相異於該入光面311之另一側係為一出光面312。 該第二分光元件51之一側係為一入光面511，該第二分光元 件51相異於該入光面511之另一側係為一出光面512。該第 三分光元件61之一側係為一入光面611，該第三分光元件 13 201213855 相/、於該入光面611 前述該第一笋糸-—侧係為一出光面012。 置於該第—分光^疋午11、該第一聚光元件21係對應設 第一聚光元件二於亥入光面311之該側，且該 該第一分光元件31 j二第光元件11之該出光面111與 今、之5亥入光面311之間。 置於i第14、該第二聚光元件22係對應設 第二聚光林光面5U之該側，且該 該第二分光元件51 牛14之該出光面141與 哀先面511之間。 置於今發光元件24、該第三聚光元件23係對應設 位於該第三發光元件24之該出光面241與 〇亥苐二分先兀件61之該入光面611之間。 =分光凡件1G係呈X字型，且該第四分光元件10 ==Γ部份1G卜—第二部份102、—第三部份⑽ 笛-1〇4，該第一部份1〇1、該第二部份102、該 j伤10 3以及該第四部份i 〇 4係選擇性地順時針或逆時 針依序排列（圖中係僅示順時針依序排列）。 該第-分光元件31係設置於該第—部份⑻及該第二 之間、该第二分光元件51係言免置於該第二部份⑽ 及該第一。卩份103之間、該第三分光元件61係設置於該第 四部份104及該第一部份ιοί之間。 在此需特別說明，前述該第一發光元件n、該第二發光 元件14、該第三發光元件24皆係包含有螢光粉，而該^一 發光元件11或該第二發光元件14或該第三發光元件24係 為例如發光一極體或雷射。該第一發光元件11、該第二發^ 元件14、該第三發光元件24先於其内部產生未激發光線XA， 201213855 ΐί;之ί激發光線A再分別被該第-發光元件U _發成為=粉(圖中 而=r-發光元件"、該第二發光元== ”具有，顏^第^=之=發光 光元件所激發之已激發光線E具有 麵二發 顏色係為例如紅色、該第三發光元件24所&二該第二 線F具有-第三顏色，該第三顏色係為例如x藍色。激發光 …在此需特別說明，前述該第—分光元件31係 弟一顏色之已激發光線B通過，且該第一分光元/、有該 未激發光線A被反射。前述該第二分光元件5 ^係令 該第二顏色之已激發光線E通過，且該第二分光元7具有 令未激發光線A被反射。前述該第二分光元^ 31&件51係 有該第三顏色之已激發光線F通過，且 僅令具 係令未激發_ A被反射。 61 該第四分光元件之該第一部份101係令僅令具 顏色之已激發光線B通過，且該第一部份1〇1係令具，一 三顏色之已激發光線F被反射至該第三部份該第 份104之間。該第四分光元件之該第2部份ι〇2係令且四# 第二顏色之已激發光線ε被反射至該第三部份103二該 部份104之間。 久5亥第四 當具有該第-顏色之已激發光線Β、仍未被激 未激發光線A，行進至該第一分光元件31之該入光&餘 時’该第-分光兀件31令具有該第—顏色之已激 ^ 通過’且該第-分光元件將仍未被激發之剩餘未激& 線Α加以反射。繼之，被反射後之剩餘未激發光線 A再次 15 201213855 依序入射該第一聚光元件2i以及該第一發光元件丨丨。前述 被再次反射後之剩餘未激發光線Α再入射該第—發光元件 11後，被該第一發光元件11内部所包含之螢光粉（圖中未示) 再次激發成為具有該第一顏色之已激發光線B，以供該光學 系統再次利用。After the reflection, the excited light E of the second color, the remaining unexcited light A = the light incident surface 81 of the second light splitting element 8 is used, and the second light splitting element 8 causes the excited light of the second color of the s E passes, and the second beam splitting element 8 reflects the remaining unexcited light a that is still unexcited. Then, the remaining unexcited light A after being reflected is incident on the second reflective element 6, and is reflected by the first and reflective elements 6. Thereafter, the unexcited light ray is again incident on the first light splitting element 8', and the second light splitting element 8 reflects the remaining unexcited light a again. The remaining unexcited light A that has been reflected again is incident on the first spectral element 7 and is reflected by the first spectral element 7. The remaining unexcited light A after being reflected again is incident on the second light-emitting element 14, and is again excited by the phosphor (not shown) contained in the second light-emitting element 14 to have the second color. The light E is excited for reuse by the optical system. On the other hand, when the light having the third color enters the second light-emitting surface 82 of the element 8, the second light-splitting element 8 reflects the light D having the first color. Then, the reflected light having the third color and the excited light B having the first color passing through the first light splitting element 7 and the second light splitting element 8 pass through the second light splitting element 8 The excited light rays E having the second color merge with each other for use by the optical system. Referring to Figure 5, there is shown a schematic view of a third preferred embodiment of the fresh wire of the present invention. Please refer to FIG. 6 again, which is a schematic diagram showing the optical path of the third preferred embodiment of the optical secret of the present invention. The optical system of the present invention i 201213855 includes at least one 笸 ‘ 21, a light splitting element g. X element n, a first light collecting element The first light emitting element U has a - 21 system corresponding to the first light emitting element surface. The side of the first concentrating element splitting element 9 is at -5 of the 5 illuminating surface 111. The other side of the light incident surface is such that the light-emitting surface element 9 is different from the first light-collecting element 21 and the first light-collecting element 21 is opposed to the light. Just to the side of the light-incident surface 91 of the first light-emitting element, and the first light-splitting element 9 is the (four) wire (1) of the element η, which is difficult to emit the first light, and the Β兮 土 - π reverse knife 疋9 between the light-incident surface 91 and the first-order U-piece 9 and the first-light-emitting turn 1 need to be specifically described here, the aforementioned first-person = ° Chu 18--from the afternoon is, for example, a light-emitting diode Or a laser.嗲 嗲 光 τ 件 件 件 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先 先And being emitted to the first light-emitting element 11, the excited light B excited by the first light-emitting element n has 2, ... the n color is, for example, green. In addition, the above-mentioned light-emitting element 9 is Only the excited light B having the first color is passed, and the current splitting element 9 causes the unexcited light A to be reflected. ^ Please continue to refer to Fig. 6, when used, the inside of the first light emitting element u is generated. The unexcited light A is first excited by the fluorescent powder (not shown) contained in the first light-emitting element 1 to become the excited light having the first color. Then, the first color is excited. The light B and the remaining unexcited light A that are still not excited are released outside the first light-emitting element n, are concentrated and concentrated by the first light-collecting element 21, and then are directed toward the light-splitting element 9 The light entering surface 91 travels. When the excited light B of the first color is present, Excited remaining 12 201213855 Unexcited light A, when traveling to the light incident surface 91, the spectroscopic element 9 passes the excited light B having the first color, and the spectroscopic element 9 will remain unexcited remaining The excitation light A is reflected. Then, the remaining unexcited light A after being reflected is sequentially incident on the first concentrating element 21 and the first illuminating element 11. The remaining unexcited light A after being reflected again is re-incident. After the first light-emitting element 11, the phosphor powder (not shown) contained in the first light-emitting element 11 is again excited to become the excited light B' having the first color for reuse by the optical system. Please refer to FIG. 7 , which is a schematic view showing a fourth preferred embodiment of the optical system of the present invention. Please refer to FIG. 8 again, which shows the fourth embodiment of the optical system of the present invention. The optical path of the preferred embodiment includes at least one first light emitting element 11, at least one second light emitting element 14, at least one third light emitting element 24, a first light collecting element 21, and a first optical element. Dimeric light The element 22, a third concentrating element 23, a first beam splitting element 31, a second beam splitting element 51, a third beam splitting element 61 and a fourth beam splitting element 10. The first illuminating element 11, the second illuminating element The element 14 and the third light-emitting element 24 respectively have a light-emitting surface 111, a light-emitting surface 141, and a light-emitting surface 241. The first light-collecting element 21 is disposed corresponding to the light-emitting surface 111 of the first light-emitting element 11. The second concentrating element 22 is disposed corresponding to the light emitting surface 141 of the second illuminating element 14 , and the third concentrating element 23 is correspondingly disposed at the light emitting surface 241 of the third illuminating element 24 . One side of the light splitting element 31 is a light incident surface 311, and the other side of the light splitting element 31 is different from the light incident surface 311 as a light exit surface 312. One side of the second beam splitting element 51 is a light incident surface 511, and the other side of the second light splitting element 51 is different from the light incident surface 511 as a light exiting surface 512. One side of the third beam splitting element 61 is a light incident surface 611, and the third light splitting element 13201213855 phase/the light incident surface 611 is a light exiting surface 012. The first light collecting element 21 is disposed on the side of the first light collecting element 2 on the side of the light incident surface 311, and the first light splitting element 31 j is disposed on the side of the first light collecting element 21 The light-emitting surface 111 of 11 is between the present and the 5th light-emitting surface 311. The second light collecting element 22 is disposed on the side of the second light collecting surface 5U, and the second light splitting element 51 is between the light emitting surface 141 and the first light surface 511 of the cow 14 . The light-emitting element 24 and the third light-collecting element 23 are disposed between the light-emitting surface 241 of the third light-emitting element 24 and the light-incident surface 611 of the 苐 苐 苐 。 。 61. = Spectrometer 1G is X-shaped, and the fourth spectroscopic element 10 == Γ part 1G 卜 - second part 102, - third part (10) flute - 1 〇 4, the first part 1 〇1, the second portion 102, the j-injured 10 3 and the fourth portion i 〇4 are selectively arranged clockwise or counterclockwise (in the figure, only clockwise is arranged). The first beam splitting element 31 is disposed between the first portion (8) and the second portion, and the second beam splitting member 51 is detached from the second portion (10) and the first portion. Between the partitions 103, the third beam splitting element 61 is disposed between the fourth portion 104 and the first portion ιοί. It should be noted that the first light-emitting element n, the second light-emitting element 14 and the third light-emitting element 24 all contain phosphor powder, and the light-emitting element 11 or the second light-emitting element 14 or The third light-emitting element 24 is, for example, a light-emitting diode or a laser. The first light-emitting element 11, the second light-emitting element 14, and the third light-emitting element 24 generate unexcited light XA beforehand, and the excitation light A is respectively sent by the first light-emitting element U_ Become = powder (in the figure, = r - illuminating element ", the second illuminating element == ” has, 颜^^== The illuminating light element E excited by the illuminating light element has a surface color of two Red, the third light-emitting element 24 & the second line F has a -third color, and the third color is, for example, x-blue. Excitation light. Here, the first light-splitting element 31 is specifically described. The first light splitting element 5 is configured to cause the excited light ray E of the second color to pass, and the second light splitting element 5 is passed through, and the second light splitting element 5 is configured to pass the excited light E of the second color. The second beam splitter 7 has the unexcited light A reflected. The second splitter 31 & 51 has the third color of the excited light F passing through, and only causes the unexcited _A to be The first portion 101 of the fourth beam splitting element is such that only the colored excited light is B passes, and the first portion 1〇1 is a device, and a three-color excited light F is reflected between the third portion 104. The second portion of the fourth beam splitter The ι〇2 command and the fourth #2 color of the excited light ε are reflected between the third portion 103 and the portion 104. The long time 5 hai fourth when the first color has the excited light Β, Still not excited by the unexcited light A, the light entering the first beam splitting element 31 & the remaining time 'the first splitting element 31 is such that the first color is excited and the first light is split The component reflects the remaining unexcited & Α that is still unexcited. Then, the remaining unexcited light A after being reflected again 15 201213855 sequentially enters the first concentrating element 2i and the first illuminating element 丨丨After the re-reflected remaining unexcited light ray is incident on the first light-emitting element 11, the phosphor powder (not shown) contained in the first light-emitting element 11 is again excited to have the first color. Light B has been excited for reuse by the optical system.
同理地，當具有該第二顏色之已激發光線E、仍未被激 發之剩餘未激發光線A ’行進至該第二分光元件51之該入 光面511時，§亥弟一·分光元件51令具有該第二顏色之已激 勒光線E通過，且違第一分光元件51將仍未被激發之剩餘 未激發光線A加以反射。繼之，被反射後之剩餘夫激获糸線 A再次依序入射該第二聚光元件22以及該第二發^元件 14。前述被再次反射後之剩餘未激發光線入再入射^第二發 光元件14後，被該第二發光元件14内部所包含之螢光粉（圖 中未不）再次激發成為具有該第二顏色之已激發光線E，以供 該光學系統再次利用。Similarly, when the excited light ray E having the second color and the remaining unexcited light A ′ that are still not excited are advanced to the light incident surface 511 of the second beam splitting element 51, the sigma-distributing element 51 causes the stimulated light E having the second color to pass, and the remaining unexcited light A that is still unexcited is reflected off the first light splitting element 51. Then, the reflected residual excitation line A is incident on the second concentrating element 22 and the second transmitting element 14 in sequence. After the remaining unexcited light that has been reflected again is re-incident into the second light-emitting element 14, the phosphor contained in the second light-emitting element 14 (not shown) is excited again to have the second color. Light E has been excited for reuse by the optical system.
同理地，當具有該第三顏色之已激發光線F、仍未被激 發之剩餘未激發光線A，行進至該第三分光元件61之該入 光面611時，該第三分光元件61令具有該第三顏色之已激 發光線F通過’且該第三分光元件61將仍未被激發之剩餘 未激發光線A加以反射，之，被反射後之剩餘未激發光線 ^ ^次依序人射該第三聚光元件23以及該第三發光元件 24。一刖述被再次反射後之剩餘未激發光線a再入射該第三發 二y 24後’被該第二發光元件％内部所包含 再次激發成為具有_三糾之⑽發 該光學糸統再次利用。 16 201213855 件11之仍未被激發之剩餘未激發光線A加以反射，再搭配 利用該反射元件3加以反射未激發光線a，進而令未激發光 線A再入射該第一發光元件11，被該第一發光元件11内部 所包含之螢光粉再次激發成為具有該第一顏色之已激發光 線B。亦或直接利用該分光元件9加以反射未激發光線A， 進而令未激發光線A被該第一發光元件η内部所包含之榮 光粉再次激發成為具有該第一顏色之已激發光線B。亦或係 利用該第一分光元件7、該第二分光元件8分別將該第一發Similarly, when the excited light ray F having the third color and the remaining unexcited light A that is still not excited are advanced to the light incident surface 611 of the third light splitting element 61, the third light splitting element 61 makes The excited light F having the third color passes through 'and the third beam splitting element 61 reflects the remaining unexcited light A that is still unexcited, and the remaining unexcited light that is reflected is sequentially shot. The third concentrating element 23 and the third illuminating element 24. A re-reflection of the remaining unexcited light a after re-reflection is re-excited by the second illuminating element% after being re-excited by the second illuminating element% to have the _three corrections (10). . 16 201213855 The remaining unexcited light A of the 11th element that is still unexcited is reflected, and the unexcited light a is reflected by the reflective element 3, and the unexcited light A is incident on the first light emitting element 11 again. The phosphor powder contained inside the light-emitting element 11 is again excited to become the excited light B having the first color. Alternatively, the spectroscopic element 9 is used to directly reflect the unexcited light A, and the unexcited light A is again excited by the luminescent powder contained in the first light-emitting element η to become the excited light B having the first color. Or using the first beam splitting element 7 and the second beam splitting component 8 to respectively make the first hair
光元件11、該第二發光元件14之仍未被激發之剩餘未激發 光線A加以反射，再搭配該第一反射元件5、該第二反射元 件6加以反射未激發光線A。進而令剩餘未激發光線A再入 射該第一發光元件11、該第二發光元件14，被該第一發光 元件11、該第二發光元件14内部所包含之螢光粉再次激發 成為具有該第一顏色之已激發光線B、具有該第二顏色之已 激發光線E。如此使得未激發光線A被善加重複利用，提高 了光源之利用效率。 本發明之光學系統只需㈣地搭配利用該分光元件4及 =;二==第該亦或簡易地搭 邊弟一刀先兀件8及該第一反射 以上所述僅為舉例性，而非為限 利=進行之等效㈣或 【圖式簡單說明】 圖 第1圖係為本發明之鮮系統H佳實施例之示意 17 201213855 第2圖係為本發明之光學系統之第一較佳實施例之光學 路徑示意圖； 第3圖係為本發明之光學系統之第二較佳實施例之示意 圖； 第4圖係為本發明之光學系統之第二較佳實施例之光學 路徑不意圖； 第5圖係為本發明之光學系統之第三較佳實施例之示意 圖， 第6圖係為本發明之光學系統之第三較佳實施例之光學 路徑不意圖； 第7圖係為本發明之光學系統之第四較佳實施例之示意 圖；以及 第8圖係為本發明之光學系統之第四較佳實施例之光學 路徑不意圖。 【主要元件符號說明】 11 第一發光元件 111 出光面 12 第二發光元件 121 出光面 13 第三發光元件 131 出光面 14 第二發光元件 141 出光面 24 第三發光元件 18 201213855The optical element 11 and the remaining unexcited light A of the second light-emitting element 14 that are still unexcited are reflected, and the first reflective element 5 and the second reflective element 6 are combined to reflect the unexcited light A. Further, the remaining unexcited light A is incident on the first light-emitting element 11 and the second light-emitting element 14 again, and is excited by the first light-emitting element 11 and the phosphor powder contained in the second light-emitting element 14 to have the first An excited light B of one color, an excited light E having the second color. In this way, the unexcited light A is reused and reused, which improves the utilization efficiency of the light source. The optical system of the present invention only needs to (4) cooperate with the spectroscopic element 4 and =; two == the first or the simple side of the first knives 8 and the first reflection are merely exemplary, rather than Equivalent (4) or [Simplified description of the drawings] Fig. 1 is a schematic diagram of a preferred embodiment of the fresh system H of the present invention. 201213855 Fig. 2 is a first preferred embodiment of the optical system of the present invention. 3 is a schematic view of a second preferred embodiment of the optical system of the present invention; and FIG. 4 is a schematic view of the optical path of the second preferred embodiment of the optical system of the present invention; 5 is a schematic view showing a third preferred embodiment of the optical system of the present invention, and FIG. 6 is a schematic view showing an optical path of a third preferred embodiment of the optical system of the present invention; FIG. 7 is a view of the present invention A schematic view of a fourth preferred embodiment of the optical system; and FIG. 8 is an optical path of the fourth preferred embodiment of the optical system of the present invention. [Description of main component symbols] 11 First light-emitting element 111 Light-emitting surface 12 Second light-emitting element 121 Light-emitting surface 13 Third light-emitting element 131 Light-emitting surface 14 Second light-emitting element 141 Light-emitting surface 24 Third light-emitting element 18 201213855
241 出光面 21 第一聚光元件 22 第二聚光元件 23 第三聚光元件 3 反射元件 4 分光元件 41 入光面 42 出光面 5 第一反射元件 6 第二反射元件 7 第一分光元件 71 入光面 72 出光面 8 第二分光元件 81 入光面 82 出光面 9 分光元件 91 入光面 92 出光面 31 第一分光元件 19 201213855 311 入光面 312 出光面 51 第二分光元件 511 入光面 512 出光面 61 第三分光元件 611 入光面 612 出光面 10 第四分光元件 101 第一部份 102 第二部份 103 第三部份 104 第四部份 A 未激發光線 B 已激發光線 C 光線 D 光線 E 已激發光線 F 已激發光線241 light-emitting surface 21 first light-collecting element 22 second light-collecting element 23 third light-collecting element 3 reflective element 4 light-splitting element 41 light-incident surface 42 light-emitting surface 5 first reflective element 6 second reflective element 7 first light-splitting element 71 Light-incident surface 72 Light-emitting surface 8 Second light-splitting element 81 Light-incident surface 82 Light-emitting surface 9 Light-splitting element 91 Light-incident surface 92 Light-emitting surface 31 First light-splitting element 19 201213855 311 Light-incident surface 312 Light-emitting surface 51 Second light-splitting element 511 Light-in Surface 512 light-emitting surface 61 third light-splitting element 611 light-incident surface 612 light-emitting surface 10 fourth light-splitting element 101 first portion 102 second portion 103 third portion 104 fourth portion A unexcited light B excited light C Ray D Ray E has excited light F has excited light
2020