1362558 101年Ό2月17日梭正替換頁 六、發明說明： 【發明所屬之技術領域】 [〇则]本發明涉及一種光學系統，尤其涉及一種投影系統。 【先前技術】 [0002] 目前’數位光學投影系統中為提升光源均勻度，一般會 於光源之光路徑後設置積分柱，以使光源發出之光線均 月bt焦於積分柱之入光面而進入積分柱内進行多次反射 而投射出去。而為提升數位光學投影系統之亮度，一般 會採用多光源架構。 [0003] 然而，採用多光源架構需要將複數光束投射至積分柱。 為使複數光束均能聚焦於積分柱之入光面而進入積分柱 ’一般採用兩個橢圓燈罩做切角後並排設置以使光線聚 焦時光錐度（Lightcone)較小而直接聚焦至積分柱之入 光面，但橢圓燈罩做切角後光線易散失，從而導致光線 利用率低，亮度提升較小。 【發明内容】 [0004] 有鑒於此’有必要提供一種能有效提高多光源之光線利 用率之投影系統。 [0005] —種投影系統，其包括複數光源、及沿光源光路依次設 置之多組調整稜鏡、一聚焦透鏡及一積分柱。所述各組 調整稜鏡分別與所述各光源相對應。所述積分柱包括一 入光面。所述各光源中每個光源發出之平行光線經相對 應設置之各組調整稜鏡折射及所述聚焦透鏡聚焦後與所 述積分柱之入光面之間之光錐度為所述各光源單獨設計 時通過所述積分柱所有光線與所述積分柱之入光面之間 09711330#單编號 A01〇l 第 4 頁 / 共 15 頁 1013062910-0 1362558 _ 101 年.02 月 之光錐度之η分之一 ’其中，光線與所述積分柱的入光面 形成的光錐度為光線與所述聚焦透鏡的光轴方向的夾角 ，η為光源之個數且η大於1。 [0006] 相較於先前技術，所述之投影系統藉由設置與多光源相 對應之多組調整棱鏡，使各光源發出之光線經各組調整 棱鏡折射後均投射至所述積分柱之入光面内，從而能有 效提高多光源之光線利用率。 【實施方式】 [0007] 下面將結合附圖對本發明實施方式作進一步之詳細說Β月 〇 [0008] 請一併參閱圖1及圖2，其為本發明第一實施方式之投影 系統100，其包括兩個光源10，兩組調整稜鏡20、一聚焦、 透鏡40及一積分柱60。所述各組調整稜鏡20與所述各光 源10相對應且設置於各光源10與所述聚焦透鏡4 0之間。 積分柱6.0具有一入光面62，各光源1〇發出之光線經各自 相對應之調整稜鏡2Ό折射後均對準聚焦透鏡4〇，並經聚 焦透鏡40聚焦後投射至所述積分柱6〇之入光面62。 [0009] 各光源10均包括一燈泡12及一燈罩14。所述燈泡12收容 於所述燈罩14内。本實施方式中，燈罩14之外形為拋物 線形狀。燈泡12發出之光線經燈罩14反射後平行投射出 去。本實施方式中’兩個光源10並排平行設置且其燈罩 14開口方向相同。 [0010] 每組調整稜鏡20包括一第一調光棱鏡22及一第二調光棱 鏡24。光源10發出之光線依次經所述第一調光棱鏡22、 酬产單編號Α〇101 第5頁/共15頁 1013062910-0 1362558 101年02月17日修正替換頁 所述第二調光稜鏡24折射後投射至聚焦透鏡40。 [0011] 本實施方式中，第一調光稜鏡22與第二調光稜鏡24均為 直角梯形稜鏡。如圖2所示，第一調光稜鏡22之兩相互平 行之上底邊為Lu，下底邊為L12，連接上底邊Ln與下底 邊L12之直角邊為L13及斜邊為L14»第二調光稜鏡24之兩 相互平行之上底邊為L21，下底邊為L22，連接上底邊L21 與下底邊l22之直苒邊為l23及斜邊為l24。 [0012] 第一調光棱鏡22之頂角（即直角邊L13與斜邊L14所形成之 夾角）與第二調光稜鏡24之頂角（即直角邊L23與斜邊L24 所形成之夾角）均為。第二調光稜鏡24之直角邊L23相 對於第一調光稜鏡22之直角邊L13傾斜之角度為。第 一調光稜鏡22之直角邊L13之長度為〇1，下底邊L12之長 度為D2。第二調光稜鏡24之直角邊L23之長度為〇3，下底 邊1^。9之長度為D,。第一調光稜鏡22及第二調光棱鏡24之 L L 4 折射率均為。 [0013] 請參閲圖1，本實施方式中，建立一個三維坐標系，於聚 焦透鏡40之平面上互相垂直方向建立X轴（即垂直於光源 10之排列方向）與Y軸，聚焦透鏡40之光軸方向為Z轴。 [0014] 各燈泡12發出之光線經由燈罩14反射後平行入射至第一 調光稜鏡22形成圓形光斑，本實施方式中，該圓形光斑 之直徑為(^。如圖2所示，各圓形光斑經第一調光稜鏡22 及一第二調光稜鏡24折射後沿X軸方向壓缩後調整為橢圓 形光斑，即X轴方向之長度壓縮，Y軸方向之長度不變。 0971 廳#料號 A0101 第6頁/共15頁 1013062910-0 1362558 ___ 101年.02月17日接正替换頁 因此，該橢圓形光斑之短軸長度為d2，長軸長度為圓形 光斑之直徑d〗。本實施方式中，橢圓形光斑之短軸等於 長軸之二分之一，即d /d, = l/2。 i 1 [0015] 本實施方式中，採用雙光源設計即需將各光源1〇發出之 圓形光斑壓縮後形成橢圓形光斑需滿足光線均能聚焦於 積分柱60之入光面62之光錐度（光線與積分柱60之入光面 62形成之光錐度即指光線與z軸方向之夾角）之要求。即 該橢圓形光斑相對於積分柱60之光錐度應為單光源設計 時之光錐度之二分之一才能使雙光源10形成之兩個橢圓 形光斑與積分柱60之入光面62形成之總光錐度與單光源 設計時所形成之圓形光斑與積分柱60之入光面62形成之 光錐度相等，從而使雙光源10之所有光線均可藉由聚焦 透鏡40投射至積分柱60。本實施方式中，假設光線與積 分柱60之入光面62之光錐度為30〇，則各光源1〇發出之圓 形光斑壓縮後形成橢圓形光斑與積分柱60形成之光錐度 為 15。〇 [0016] 為滿足此需求’（1卩與(1丨之設計應滿足以下關係運算式： dJ/d^CcosUrcsirKi^sin^phVCcose、）2，且 同時也滿足以下關係運算式：g2=arcsin(nising [0017] 假設第一調光稜鏡22與第二調光稜鏡24之折射率^ 1.5168 根據（cosCarcsinCr^sin β i ) = 1/2，求得沒1 = 320。根據沒2= arcsiiKr^sin g 09711330^"^^^* A0101 第7頁/共15頁 1013062910-0 1362558 101年02月17日接正替換頁 沒丨，求得θ2 = 21. 5°。本實施方式中，為更好之滿足 設計需求及儘量使得投影系統1〇〇小型化’使第一調光稜 鏡22與第二調光稜鏡24之邊長滿足以下要求即可’ Di = 60 毫米（mm)，D =48. 75mm，D =40mm ’ D =34nm。 [0018] 可以理解，第一調光稜鏡22與第二調光稜鏡24之間之設 置方位可以改變，只需滿足將各光源1〇發出之光線形成 之圓形光斑沿X軸（即垂直於雙光源1 〇之排列方向）方向壓 縮調整為橢圓形光斑以使該橢圓形光斑與積分柱60之入 光面62之間之光錐度均在光線能通過積分柱60之光錐度 範圍（即小於或等於入射至積分柱60之入光面62之邊緣光 線形成之光錐度）内，從而有效提高多光源光線之利用率 ，並提高整個投影系統之亮度。 [0019] 請參閱圖3，其為本發明第二實施方式之投影系統200， 其與第一實施方式之投影系統100之不同之處在於進一步 包括一光源10及一組調整稜鏡20，即本實施方式之投影 系統200包括三個光源10及三組調整棱鏡20。各光源1〇 發出之光線經各自相對應之調整棱鏡20之第一調光稜鏡 22及第二調光稜鏡24折射後均對準聚焦透鏡40，並經聚 焦透鏡40聚焦後投射至所述積分枉60之入光面62。 [0020] 為使三個光源10發出之光線均能投射至積分柱60，則需 將三個光源10發出之光線形成之圓形光斑沿X軸方向壓縮 、Υ轴方向不變調整為橢圓形光斑且各橢圓形光斑與積分 柱60之入光面62之間形成之光錐度均為單光源設計時所 形成之圓形光斑與積分柱60之入光面62形成之光錐度之 09711330^單编號 Α0101 第8頁/共15頁 !〇13〇6291〇-〇 101年.02月17日梭正替換頁 三分之一，即d2/d〗 = l/3 » [0021] -Γ 、 可以理解，投影系統包括n個光源1〇及η組調整稜鏡2〇時 ，各光源10發出之光線形成之圓形光斑壓縮調整為橢圓 形光斑且各橢圓形光斑與積分柱60之入光面62之間形成 之光錐度均為單光源設計時所形成之圓形光斑與積分柱 6〇之入光面62形成之光錐度之η分之一，即d2/d =1/η， 其中’ η為自然數。 t Q22] 所述投影系統藉由相對應之光源10設置第一調光棱鏡22 及第二調光稜鏡24，從而使光源10發出之圓形光斑經第 一調光棱鏡及第二調光稜鏡後沿垂直於光源1〇之排列方 向壓縮調整為橢圓形，同時使調整後之贿圓形光斑之與 積分柱60之入光面62之間形成之光錐度均在光線能通過 積分柱60之光錐度之範圍内，從而有效提高多光源之光 線利用率。 [〇〇23] 综上所述，本發明確已符合發明專利要件，奚依法提出 專利申請。惟’以上所述者僅為本發明之較佳實施方式 ’舉凡熟悉本案技藝之人士 ’於援依本案發明精神所作 之等效修飾或變化’皆應包含於以下之申請專利.範面内 〇 【圖式簡單說明】 [0024] 圖1為本發明第一實施方式之投影系統結構示意圖 [0025] 圖2為圖1中投影系統之調整棱鏡調整光線示意圖； [0026]圖3為本發明第二實施方式之投影系統結構示意圖 【主要元件符號說明】 1013062910-0 〇97U33〇户單编號A0101 第9頁/共I5頁 1362558 [0027] 投影系統：100 、200 [0028] 光源：10 [0029] 燈泡：12 [0030] 燈罩：14 [0031] 調整稜鏡：20 [0032] 第一調光棱鏡： 22 [0033] 第二調光棱鏡： 24 [0034] 聚焦透鏡：40 [0035] 積分柱：60 [0036] 入光面：6 2 09711330#單编號 A〇101 第10頁/共15頁 101年02月17日核正替換頁 1013062910-01362558 101 101 Ό Ό Ό Ό Ό 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六 六[Prior Art] [0002] At present, in order to improve the uniformity of the light source in the digital optical projection system, an integrating column is generally arranged after the light path of the light source, so that the light emitted by the light source is focused on the light incident surface of the integrating column. Enter the integral column and perform multiple reflections to project out. To enhance the brightness of a digital optical projection system, a multi-light source architecture is typically employed. [0003] However, the use of a multi-source architecture requires the projection of a complex beam to an integrating column. In order to make the complex beam can be focused on the entrance surface of the integrating column and enter the integral column, generally two elliptical lampshades are used for the chamfering angle, and then arranged side by side so that the light cone is small and the light cone is directly focused to the integral column. Glossy, but after the elliptical lampshade is cut, the light is easily lost, resulting in low light utilization and less brightness enhancement. SUMMARY OF THE INVENTION [0004] In view of the above, it is necessary to provide a projection system that can effectively improve the light utilization rate of multiple light sources. [0005] A projection system includes a plurality of light sources, and a plurality of sets of adjustments, a focus lens, and an integrating column sequentially disposed along the light path of the light source. Each of the sets of adjustments corresponds to each of the light sources. The integrating column includes a light incident surface. The parallel light rays emitted by each of the light sources are adjusted by respective groups, and the light taper between the focusing lens and the light incident surface of the integrating column is separate for each light source. Between the light passing through the integrating column and the light-in surface of the integrating column, the design is 09711330#单号A01〇l Page 4 of 15 1013062910-0 1362558 _ 101 years. In one of the cases, the light taper formed by the light and the light incident surface of the integrating column is the angle between the light and the optical axis direction of the focusing lens, and η is the number of light sources and η is greater than 1. [0006] Compared with the prior art, the projection system is configured to set a plurality of sets of adjustment prisms corresponding to the plurality of light sources, so that the light emitted by each light source is refracted by each set of adjustment prisms and projected onto the integration column. In the smooth surface, it can effectively improve the light utilization rate of multiple light sources. [0007] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. [0008] Please refer to FIG. 1 and FIG. 2 together, which is a projection system 100 according to a first embodiment of the present invention. It comprises two light sources 10, two sets of adjustments 、20, a focus, a lens 40 and an integrating column 60. Each of the sets of adjustments 20 corresponds to the respective light sources 10 and is disposed between each of the light sources 10 and the focus lens 40. The integrating column 6.0 has a light incident surface 62. The light emitted by each light source 1 is refracted by the corresponding adjustment 稜鏡2Ό, and is aligned with the focusing lens 4〇, and is focused by the focusing lens 40 and projected onto the integrating column 6 〇 into the glossy surface 62. Each of the light sources 10 includes a bulb 12 and a lamp cover 14. The bulb 12 is housed within the globe 14. In the present embodiment, the outside of the globe 14 is formed in a parabolic shape. The light emitted by the bulb 12 is reflected by the lamp cover 14 and projected in parallel. In the present embodiment, the two light sources 10 are arranged side by side in parallel and the opening direction of the globe 14 is the same. [0010] Each set of adjustments 20 includes a first dimming prism 22 and a second dimming prism 24. The light emitted by the light source 10 is sequentially passed through the first dimming prism 22, the reciprocal order number Α〇 101, the fifth dimming edge, and the second dimming edge, which is described on the replacement page of the revised page of February 17, 2011. The mirror 24 is refracted and projected onto the focusing lens 40. [0011] In the present embodiment, the first dimming 稜鏡 22 and the second dimming 稜鏡 24 are both right-angled trapezoids. As shown in FIG. 2, the two bottom sides of the first dimming cymbal 22 are parallel to each other, and the lower bottom side is L12, and the right side edge connecting the upper bottom edge Ln and the lower bottom side L12 is L13 and the oblique side is L14. »The second dimming 稜鏡24 is parallel to each other, the bottom edge is L21, the lower bottom edge is L22, and the straight edge of the upper bottom edge L21 and the lower bottom edge l22 is l23 and the oblique side is l24. [0012] The apex angle of the first dimming prism 22 (ie, the angle formed by the right-angled side L13 and the oblique side L14) and the apex angle of the second dimming cymbal 24 (ie, the angle formed by the right-angled side L23 and the oblique side L24) ) are all. The angle between the right-angled side L23 of the second dimming cymbal 24 and the right-angled side L13 of the first dimming cymbal 22 is. The length L13 of the first dimming cymbal 22 is 〇1, and the length of the lower rim L12 is D2. The length of the right angle side L23 of the second dimming cymbal 24 is 〇3, and the lower bottom side is 1^. The length of 9 is D,. The L L 4 refractive indices of the first dimmer 22 and the second dimming prism 24 are both. Referring to FIG. 1, in the embodiment, a three-dimensional coordinate system is established, and an X-axis (ie, an alignment direction perpendicular to the light source 10) and a Y-axis are formed in a mutually perpendicular direction on a plane of the focus lens 40, and the focus lens 40 is provided. The direction of the optical axis is the Z axis. [0014] The light emitted by each of the bulbs 12 is reflected by the lamp cover 14 and then incident parallel to the first dimming cymbal 22 to form a circular spot. In the present embodiment, the diameter of the circular spot is (^. As shown in FIG. 2, Each circular spot is refracted by the first dimming 稜鏡 22 and a second dimming 稜鏡 24 and then compressed in the X-axis direction to be adjusted to an elliptical spot, that is, the length in the X-axis direction is compressed, and the length in the Y-axis direction is unchanged. 0971 Hall #Item A0101 Page 6 of 15 1013062910-0 1362558 ___ 101 years. February 17th Replacement page Therefore, the elliptical spot has a short axis length of d2 and a long axis length of a circular spot. In the present embodiment, the short axis of the elliptical spot is equal to one-half of the long axis, that is, d / d, = l / 2. i 1 [0015] In this embodiment, the dual light source design is adopted. The circular spot generated by each light source 1 is compressed to form an elliptical spot, and the light taper which can be focused on the light incident surface 62 of the integrating column 60 (the light taper formed by the light and the light incident surface 62 of the integrating column 60) is required. That is, the requirement of the angle between the light and the z-axis direction, that is, the light of the elliptical spot relative to the integrating column 60. The taper should be one-half of the taper of the single-source design to form the total optical taper formed by the two elliptical spots formed by the dual source 10 and the incident surface 62 of the integrating post 60 and the circle formed by the single-source design. The light spot is equal to the light taper formed by the light incident surface 62 of the integrating column 60, so that all the light of the dual light source 10 can be projected to the integrating column 60 by the focusing lens 40. In the present embodiment, the light and the integrating column 60 are assumed. The light taper of the light incident surface 62 is 30 〇, and the circular spot emitted by each light source 1 is compressed to form an elliptical spot and the light taper formed by the integrating column 60 is 15. [0016] To satisfy this demand '(1卩The design of (1丨) should satisfy the following relational expression: dJ/d^CcosUrcsirKi^sin^phVCcose,)2, and also satisfy the following relational expression: g2=arcsin(nising [0017] Assuming the first dimming 稜鏡22 and the second dimming 稜鏡 24 refractive index ^ 1.5168 according to (cosCarcsinCr^sin β i ) = 1/2, find no 1 = 320. According to no 2 = arcsiiKr^sin g 09711330^"^^^* A0101 Page 7 of 15 1013062910-0 1362558 On February 17, 101, the replacement page was replaced. Θ2 = 21. 5°. In the present embodiment, in order to better meet the design requirements and to minimize the size of the projection system 1 'the side of the first dimming 稜鏡 22 and the second dimming 稜鏡 24 Meet the following requirements to 'Di = 60 mm (mm), D = 48. 75 mm, D = 40 mm 'D = 34 nm. [0018] It can be understood that the orientation between the first dimming 稜鏡 22 and the second dimming 稜鏡 24 can be changed, and only the circular spot formed by the light emitted by each light source 1 is satisfied along the X axis (ie, The direction perpendicular to the direction of the arrangement of the two light sources 1 压缩 is adjusted to be an elliptical spot such that the optical taper between the elliptical spot and the entrance face 62 of the integrator 60 is in the range of light taper of the light passing through the integrating column 60 ( That is, it is less than or equal to the light taper formed by the edge light incident on the light incident surface 62 of the integrating column 60, thereby effectively improving the utilization of the multi-source light and improving the brightness of the entire projection system. [0019] Please refer to FIG. 3, which is a projection system 200 according to a second embodiment of the present invention, which is different from the projection system 100 of the first embodiment in that it further includes a light source 10 and a set of adjustments 20, ie The projection system 200 of the present embodiment includes three light sources 10 and three sets of adjustment prisms 20. The light emitted by each of the light sources 1 is refracted by the first dimming 稜鏡 22 and the second dimming 稜鏡 24 of the respective adjusting prisms 20, and is then aligned with the focusing lens 40, and is focused by the focusing lens 40 and projected onto the focus lens 40. The entrance surface 62 of the integral 枉 60 is described. [0020] In order to make the light emitted by the three light sources 10 can be projected onto the integrating column 60, the circular spot formed by the light emitted by the three light sources 10 is compressed in the X-axis direction and the axis direction is not changed to an elliptical shape. The light cone formed by the light spot and each elliptical spot and the light incident surface 62 of the integrating column 60 is a light taper formed by a single light source design and a light taper formed by the light incident surface 62 of the integrating column 60. No. 1010101 Page 8 of 15! 〇13〇6291〇-〇101. On February 17, the shuttle is replacing one-third of the page, ie d2/d〗 = l/3 » [0021] -Γ, It can be understood that when the projection system includes n light sources 1 〇 and η group adjustment 稜鏡 2 ,, the circular spot formed by the light emitted by each light source 10 is compressed and adjusted into an elliptical spot and the illuminating spots of the elliptical spot and the integrating column 60 are lighted. The light taper formed between the faces 62 is one of the η of the light taper formed by the circular spot formed by the single light source design and the light incident surface 62 of the integrating column 6〇, that is, d2/d =1/η, wherein ' η is a natural number. t Q22] the projection system is provided with a first dimming prism 22 and a second dimming yoke 24 by the corresponding light source 10, so that the circular spot emitted by the light source 10 passes through the first dimming prism and the second dimming The crucible is compressed and adjusted to an elliptical shape along the direction perpendicular to the arrangement of the light source 1〇, and the light taper formed between the adjusted circular spot and the light incident surface 62 of the integrating column 60 is passed through the integrating column. The range of light taper of 60 is effective to improve the light utilization efficiency of multiple light sources. [〇〇23] In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention. 'Equivalent modifications or variations made by those skilled in the art of the present invention in the spirit of the invention's invention shall be included in the following patent application. BRIEF DESCRIPTION OF THE DRAWINGS [0024] FIG. 1 is a schematic view showing the structure of a projection system according to a first embodiment of the present invention; [0025] FIG. 2 is a schematic view showing an adjustment prism of a projection system of FIG. Schematic diagram of the projection system of the second embodiment [Description of the main components] 1013062910-0 〇97U33 Settlement number A0101 Page 9 / Total I5 page 1362558 [0027] Projection system: 100, 200 [0028] Light source: 10 [0029 ] Lamp: 12 [0030] Lampshade: 14 [0031] Adjustment 稜鏡: 20 [0032] First dimming prism: 22 [0033] Second dimming prism: 24 [0034] Focusing lens: 40 [0035] Integral column :60 [0036] Into the light surface: 6 2 09711330#Single number A〇101 Page 10/Total 15 page 101 February 17, Nuclear replacement page 1013062910-0