TWI635314B - Portable projection device - Google Patents
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Abstract
一種投影裝置,包括具有相對於水平面傾斜的第一光軸與至少一個非正圓形光學透鏡的第一光學系統,可容納第一光學系統的鏡筒,其具有對應於至少一個非正圓形光學透鏡的非正圓形造型構件;具有第一反射表面的反射元件,使第一光軸的軸線可與第一反射表面接觸;以及具有第二反射表面的第二光學系統,可接受來自第一反射表面的影像光。 A projection apparatus comprising a first optical system having a first optical axis inclined with respect to a horizontal plane and at least one non-spherical optical lens, accommodating a lens barrel of the first optical system having at least one non-circular circular shape a non-circular shape member of the optical lens; a reflective member having a first reflective surface such that an axis of the first optical axis is in contact with the first reflective surface; and a second optical system having a second reflective surface acceptable from An image of a reflective surface.
Description
本發明是有關於一種小型投影裝置,且特別是有關於一種可攜式投影裝置。 The present invention relates to a small projection device, and more particularly to a portable projection device.
短焦投影機,尤其是超短焦投影機,可以在有限的空間長度中,投影出大畫面,對於現代化空間的利用,相當重要。而超短焦投影光學系統中,一般包括影像形成元件(例如DMD或是LCD)、光學系統與反射鏡組,使光透過得影像形成元件,形成影像光,再經由光學系統與反射鏡組,予以處理與反射,以在有限空間內,投影出大畫面在螢幕上。 Short-throw projectors, especially ultra-short-throw projectors, can project large images in a limited space length, which is important for the use of modern space. The ultra-short-focus projection optical system generally includes an image forming component (such as a DMD or an LCD), an optical system, and a mirror group, so that light is transmitted through the image forming component to form image light, and then through the optical system and the mirror group. It is processed and reflected to project a large picture on the screen in a limited space.
雖然超短焦投影光學系統使得即使在狹窄的辦公室等中使用也成為可能,但是其體積仍然過於龐大且有一定的重量而不適合隨身攜帶。因此,如何將超短焦投影光學系統進行微小化,以利於隨身攜帶,已成為重要課題之一,除了光學設計之外,投影機的機構設計,也是相當重要的。 Although the ultra-short-throw projection optical system makes it possible to use even in a narrow office or the like, its volume is still too large and has a certain weight and is not suitable for carrying around. Therefore, how to miniaturize the ultra-short-focus projection optical system to facilitate carry-on has become one of the important topics. In addition to optical design, the mechanical design of the projector is also very important.
為讓本發明的上述特徵和優點能更明顯易懂,下文特舉實施例,並配合所附圖式作詳細說明如下。 The above described features and advantages of the invention will be apparent from the following description.
本發明提供一種投影裝置及光學元件的調整機構。 The invention provides a projection device and an adjustment mechanism of an optical element.
本發明的一實施例提供一種投影裝置,包括第一光學系統,其具有相對於水平面傾斜的第一光軸與至少一個非正圓形光學透鏡;可容納第一光學系統的鏡筒,其有對應於至少一個非正圓形光學透鏡的非正圓形造型構件;具有第一反射表面的反射元件,使第一光軸的軸線可與第一反射表面接觸;以及具有第二反射表面的第二光學系統,可接受來自第一反射表面的影像光。 An embodiment of the present invention provides a projection apparatus including a first optical system having a first optical axis inclined with respect to a horizontal plane and at least one non-circular optical lens; a lens barrel accommodating the first optical system, which has a non-circular shape member corresponding to at least one non-circular optical lens; a reflective member having a first reflective surface such that an axis of the first optical axis is in contact with the first reflective surface; and a second having a second reflective surface A second optical system that accepts image light from a first reflective surface.
於一實施例中,第一光學系統具有前群光學透鏡組件與後群光學透鏡組件,至少一非正圓形光學透鏡位於前群光學透鏡組件。 In one embodiment, the first optical system has a front group optical lens assembly and a rear group optical lens assembly, at least one non-spherical optical lens being located in the front group optical lens assembly.
於一實施例中,調焦機構可使前群光學透鏡組件中的至少一光學透鏡移動。 In one embodiment, the focusing mechanism can move at least one of the front group optical lens assemblies.
於一實施例中,反射元件具有調整機構,利用多個調整螺絲使反射元件至少上下傾斜或左右傾斜。 In one embodiment, the reflective element has an adjustment mechanism that utilizes a plurality of adjustment screws to tilt the reflective element at least up and down or left and right.
於一實施例中,第二光學系統具有調整機構,利用多個調整螺絲使第二光學系統至少上下傾斜或左右傾斜。 In an embodiment, the second optical system has an adjustment mechanism that tilts the second optical system at least up and down or left and right by using a plurality of adjustment screws.
於一實施例中,與多個調整螺絲一對一對應的多個長孔,可使光學元件上下平移。 In an embodiment, the plurality of long holes corresponding to the plurality of adjusting screws are arranged to vertically translate the optical element up and down.
本發明的一實施例提供一種投影裝置,包括第一鏡群,其包括多個切邊圓形的光學透鏡,以及相對於機座平面傾斜的第一光軸;容納機構,其具有對應於多個切邊圓形透鏡的包容外殼;反射鏡,可接收來自第一鏡群的影像光;以及凹面鏡,可接受來自反射鏡的影像光。 An embodiment of the present invention provides a projection apparatus including a first mirror group including a plurality of trimmed circular optical lenses, and a first optical axis inclined with respect to a plane of the housing; and a receiving mechanism having a corresponding correspondence a containment housing for a trimmed circular lens; a mirror that receives image light from the first mirror group; and a concave mirror that accepts image light from the mirror.
本發明的一實施例提供一種光學元件的調整機構,包括多個調整螺絲,位於光學元件的相對兩邊;以及多個與調整螺絲一對一對應且套在其上的彈簧,當位於相對兩邊之一邊的部分調整螺絲相對鎖緊,位於相對兩邊之另一邊的部分調整螺絲相 對放鬆,可使光學元件向一邊傾斜。 An embodiment of the present invention provides an adjustment mechanism for an optical component, including a plurality of adjustment screws on opposite sides of the optical component, and a plurality of springs corresponding to the adjustment screws and sleeved thereon, when located on opposite sides Part of the adjustment screw on one side is relatively locked, and the adjustment screw on the other side of the opposite sides For relaxation, the optical element can be tilted to one side.
於一實施例中,包括與調整螺絲一對一對應的多個長孔,可使光學元件上下平移。 In one embodiment, a plurality of long holes corresponding to the one-to-one correspondence with the adjusting screw enable the optical element to translate up and down.
於一實施例中,光學元件具有反射面。 In an embodiment, the optical element has a reflective surface.
10‧‧‧投影光學裝置 10‧‧‧Projection optics
11‧‧‧第一光學系統 11‧‧‧First optical system
12‧‧‧平面反射鏡 12‧‧‧planar mirror
13‧‧‧第二光學系統 13‧‧‧Second optical system
80‧‧‧影像形成元件 80‧‧‧Image forming components
90‧‧‧螢幕 90‧‧‧ screen
100‧‧‧可攜式投影裝置 100‧‧‧Portable Projector
110‧‧‧合光模組 110‧‧‧Huangguang Module
120‧‧‧散熱機構 120‧‧‧heating mechanism
130‧‧‧第一光學系統 130‧‧‧First optical system
132‧‧‧第一光學系統殼體 132‧‧‧First optical system housing
140‧‧‧反射元件 140‧‧‧reflecting elements
150‧‧‧第二光學系統 150‧‧‧Second optical system
160‧‧‧調焦輪 160‧‧‧focus wheel
170‧‧‧殼體 170‧‧‧Shell
180‧‧‧風扇 180‧‧‧fan
1310‧‧‧後群光學透鏡組件 1310‧‧‧ Rear group optical lens assembly
1312‧‧‧調整凹槽 1312‧‧‧Adjust the groove
1314‧‧‧殼體調整孔 1314‧‧‧Sheet adjustment hole
1316‧‧‧殼體固定孔 1316‧‧‧ housing fixing hole
1320‧‧‧前群光學透鏡組件 1320‧‧‧Pre-group optical lens assembly
1322‧‧‧半圓形凸輪 1322‧‧‧Semicircular cam
1324、1501‧‧‧長形調整孔 1324, 1501‧‧‧ long adjustment holes
1326‧‧‧插銷 1326‧‧‧Latch
1402、1404、1406‧‧‧反射元件調整螺絲 1402, 1404, 1406‧‧‧reflecting element adjustment screws
1403、1405、1407‧‧‧彈簧 1403, 1405, 1407‧‧ spring
1502、1504、1506、1508‧‧‧第二光學系統調整螺絲 1502, 1504, 1506, 1508‧‧‧ second optical system adjustment screw
200、300‧‧‧投影光學系統 200, 300‧‧‧ projection optical system
201、301‧‧‧光軸 201, 301‧‧‧ optical axis
202‧‧‧影像處理元件 202‧‧‧Image Processing Components
204‧‧‧全反射稜鏡 204‧‧‧ total reflection
210、310‧‧‧折射單元 210, 310‧‧‧refracting unit
212‧‧‧第一透鏡組 212‧‧‧First lens group
214‧‧‧第二透鏡組 214‧‧‧second lens group
220、320‧‧‧反射單元 220, 320‧‧‧reflection unit
222、322、324‧‧‧反射器 222, 322, 324‧‧ ‧ reflector
L1-L14‧‧‧透鏡 L1-L14‧‧ lens
S1-S26‧‧‧表面 S1-S26‧‧‧ surface
I1、I2‧‧‧光線 I1, I2‧‧‧ rays
圖1為一種投影光學系統的示意圖 Figure 1 is a schematic view of a projection optical system
圖2係繪示依照本發明一實施例所述之一種可攜式投影裝置的內部組合俯視示意圖。 2 is a top plan view showing the internal combination of a portable projection device according to an embodiment of the invention.
圖3繪示本發明一實施例之第一光學系統的立體示意圖。 3 is a perspective view of a first optical system according to an embodiment of the invention.
圖4繪示本發明一實施例之第一光學系統殼體的立體示意圖。 4 is a perspective view of a first optical system housing according to an embodiment of the invention.
圖5繪示本發明一實施例之第一光學系統中的前群光學透鏡組件的立體示意圖。 FIG. 5 is a perspective view of a front group optical lens assembly in a first optical system according to an embodiment of the invention.
圖6繪示本發明一實施例之反射元件調整機構的立體示意圖。 6 is a perspective view of a reflecting element adjusting mechanism according to an embodiment of the invention.
圖7繪示本發明一實施例之反射元件的移除調整螺絲之調整機構的立體示意圖。 FIG. 7 is a perspective view showing an adjustment mechanism of a removal adjusting screw of a reflective member according to an embodiment of the invention.
圖8繪示本發明一實施例之第二光學系統調整機構的立體示意圖。 FIG. 8 is a perspective view of a second optical system adjustment mechanism according to an embodiment of the invention.
圖9繪示本發明一實施例的投影光學系統的示意圖。 FIG. 9 is a schematic diagram of a projection optical system according to an embodiment of the present invention.
圖10及圖11繪示本發明一實施例的折射單元的示意圖。 10 and 11 are schematic views of a refractive unit according to an embodiment of the present invention.
圖12為本發明一實施例的投影光學系統的示意圖。 Figure 12 is a schematic illustration of a projection optical system in accordance with an embodiment of the present invention.
圖13至圖15顯示圖9的投影光學系統的透鏡組件的光學模擬結果,其中圖13為橫向色差曲線圖,圖14及圖15為光學傳遞 函數曲線圖。 13 to 15 show optical simulation results of the lens assembly of the projection optical system of Fig. 9, wherein Fig. 13 is a lateral chromatic aberration diagram, and Figs. 14 and 15 are optical transmissions. Function graph.
有關本發明之前述及其他技術內容、特點與功效,在以下配合參考圖式之多個實施例的詳細說明中,將可清楚的呈現。以下實施例中所提到的方向用語,例如「上」、「下」、「前」、「後」、「左」、「右」等,僅是參考附加圖式的方向。因此,使用的方向用語是用來說明,而非用來限制本發明。 The foregoing and other objects, features, and advantages of the invention will be apparent from the Detailed Description The directional terms mentioned in the following embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only directions referring to the additional schema. Therefore, the directional terminology used is for the purpose of illustration and not limitation.
圖1為說明投影光學系統的示意圖。在圖1的坐標系中,符號X表示螢幕的長軸方向,符號Z表示螢幕的短軸方向,以及符號Y表示螢幕的法線方向。參見圖1,投影光學裝置10包括第一光學系統11、平面反射鏡12、第二光學系統13以及影像形成元件80。在投影光學裝置10中,第一光學系統11為包括具有同光軸、正功率的至少一折射光學透鏡系統。平面反射鏡12為一種改變從第一光學系統11至第二光學系統13的光的路徑的反射鏡。第二光學系統13包括正功率的至少一光學反射鏡系統。從影像形成元件80發出的影像光入射至第一光學系統11,其中影像形成元件為數位微型反射鏡元件(DMD),影像光在通過第一光學系統11之後經由平面反射鏡12通過第二光學系統13反射以投影在螢幕90上。 FIG. 1 is a schematic view illustrating a projection optical system. In the coordinate system of Fig. 1, the symbol X represents the long axis direction of the screen, the symbol Z represents the short axis direction of the screen, and the symbol Y represents the normal direction of the screen. Referring to FIG. 1, the projection optical device 10 includes a first optical system 11, a planar mirror 12, a second optical system 13, and an image forming element 80. In projection optics 10, first optical system 11 is comprised of at least one refractive optical lens system having the same optical axis, positive power. The plane mirror 12 is a mirror that changes the path of light from the first optical system 11 to the second optical system 13. The second optical system 13 includes at least one optical mirror system of positive power. The image light emitted from the image forming element 80 is incident on the first optical system 11, wherein the image forming element is a digital micro mirror element (DMD), and the image light passes through the second lens after passing through the first optical system 11 via the plane mirror 12 System 13 reflects to be projected onto screen 90.
以下將參照相關圖式,說明依本發明實施例之一種,其中相同的元件將以相同的參照符號加以說明。請參照圖2所示,其為本發明實施例之一種可攜式超短焦(可為但不限為可攜式或超短焦)投影裝置100的內部組合俯視示意圖。可攜式超短焦投影裝置100包含光源(圖中未顯示)、合光模組110、散熱機構120、影像形成元件(位於調焦輪160下方,圖中未顯示)、第一光 學系統130、反射元件140、第二光學系統150、調焦輪160和殼體170。其中光源例如是發光二極體(LED)、燈泡或雷射,在本發明一實施例中為使用紅藍綠三色LED的光源。在投影光學裝置中,一般使用高功率的LED光源,因此必須配合散熱機構120的設計,有效率地將熱量帶離,避免影響到投影影像光學品質。紅藍綠三色LED所發出的色光經由一些光學元件所組成的合光模組110後,混合成白光,白光通過影像形成元件而形成影像光。其中影像形成元件如數位微型反射鏡元件(DMD)、液晶面板(LCD)或液晶覆矽面板(LCOS),在本發明一實施例中為使用數位微型反射鏡元件(DMD)。第一光學系統130為包括具有同光軸的多個折射光學透鏡所組成的正功率光學系統。反射元件140如平面反射鏡、球面反射鏡、非球面反射鏡或稜鏡,用以改變從第一光學系統130至第二光學系統150的光路徑,在本發明一實施例中為使用平面反射鏡。第二光學系統150在本發明一實施例中為包括正功率的一凹面反射鏡所組成的光學系統,其亦可為凸面反射鏡、平面反射鏡、球面反射鏡、非球面反射鏡或多個反射鏡所組成的光學系統。調焦輪160用以將投影到螢幕的影像進行清晰度調整,殼體170可包覆所有的組件,避免灰塵進入而影響影像品質。 In the following, a description will be given of the embodiments of the present invention, in which the same elements will be described with the same reference numerals. Please refer to FIG. 2 , which is a schematic top view of an internal combination of a portable ultra-short focus (may be, but not limited to, a portable or ultra-short focus) projection device 100 according to an embodiment of the invention. The portable ultra short throwing projection device 100 includes a light source (not shown), a light combining module 110, a heat dissipating mechanism 120, an image forming component (located under the focusing wheel 160, not shown), and a first light. The system 130, the reflective element 140, the second optical system 150, the focus wheel 160, and the housing 170. The light source is, for example, a light emitting diode (LED), a light bulb or a laser, and in one embodiment of the invention is a light source using red, blue and green three color LEDs. In the projection optical device, a high-power LED light source is generally used. Therefore, it is necessary to cooperate with the design of the heat dissipation mechanism 120 to efficiently carry away heat, thereby avoiding affecting the optical quality of the projected image. The color light emitted by the red, blue and green three-color LEDs is mixed into white light through the light combining module 110 composed of some optical elements, and the white light forms image light through the image forming elements. The image forming element such as a digital micro mirror element (DMD), a liquid crystal panel (LCD) or a liquid crystal overlay panel (LCOS), in one embodiment of the invention, uses a digital micro mirror element (DMD). The first optical system 130 is a positive power optical system including a plurality of refractive optical lenses having the same optical axis. The reflective element 140, such as a planar mirror, a spherical mirror, an aspheric mirror or a mirror, is used to vary the optical path from the first optical system 130 to the second optical system 150, in one embodiment of the invention using planar reflection mirror. The second optical system 150 is an optical system comprising a concave mirror including positive power, which may also be a convex mirror, a plane mirror, a spherical mirror, an aspheric mirror or a plurality of optical systems. An optical system consisting of mirrors. The focus wheel 160 is used to adjust the image projected onto the screen, and the housing 170 can cover all components to prevent dust from entering and affecting image quality.
由於超短焦投影機因放大倍率較一般投影機大很多,所需之光學組件的精度也相對要求較高,藉此來確保光學品質而達到設計所需的放大倍率及其品質要求。尤其為了達到可攜式投影裝置所需之正確光線投射路徑,本發明實施例之一種可攜式投影裝置藉由多個調整機構來調整相關的光學組件(例如第一光學系統、反射元件、第二光學系統等),以達到投影影像光學品質的要求。 Since the ultra-short-throw projector is much larger than the general projector, the precision of the required optical components is relatively high, thereby ensuring the optical quality and achieving the magnification and quality requirements required for the design. In particular, in order to achieve the correct light projection path required by the portable projection device, a portable projection device according to an embodiment of the present invention adjusts related optical components by using a plurality of adjustment mechanisms (for example, the first optical system, the reflective component, and the Two optical systems, etc.) to achieve the optical quality of the projected image.
請參照圖3、圖4和圖5所示,其分別為本發明實施 例之一種可攜式投影裝置中顯示第一光學系統130、第一光學系統殼體132和前群光學透鏡組件1320的立體示意圖。本發明一實施例之第一光學系統130可區分為後群光學透鏡組件1310和前群光學透鏡組件1320。後群光學透鏡組件1310包含一調整凹槽1312,利用一調整工具如長桿(圖中未顯示)伸入殼體調整孔1314至調整凹槽1312,利用調整凹槽1312帶動後群光學透鏡組件1310前後移動到所需位置時,將螺絲(圖中未顯示)鎖入殼體固定孔1316後,即完成製造過程中後群光學透鏡組件1310的調整作業。 Please refer to FIG. 3, FIG. 4 and FIG. 5, which are respectively implemented by the present invention. A perspective view of the first optical system 130, the first optical system housing 132, and the front group optical lens assembly 1320 is shown in a portable projection device. The first optical system 130 of one embodiment of the present invention can be divided into a rear group optical lens assembly 1310 and a front group optical lens assembly 1320. The rear group optical lens assembly 1310 includes an adjustment groove 1312 extending into the housing adjustment hole 1314 to the adjustment groove 1312 by an adjustment tool such as a long rod (not shown), and the rear group optical lens assembly is driven by the adjustment groove 1312. When the 1310 is moved to the desired position, the screw (not shown) is locked into the housing fixing hole 1316, and the adjustment operation of the rear group optical lens assembly 1310 during the manufacturing process is completed.
本發明之一實施例設定的投影螢幕尺寸規格可從40吋至100吋,因此使用者可利用調焦輪160的轉動來使投影在螢幕的影像更清晰。藉由調焦輪160帶動傾斜半圓形凸輪(cam)1322轉動,再由半圓形凸輪1322帶動位於長形調整孔(barrel)1324的插銷(pin)1326前後移動,可使得前群光學透鏡組件1320的部分鏡片直進直出。要注意的是,為避免使用者在調整影像清晰度時,與從第二光學系統150射至螢幕的影像光線發生干涉現象,本發明之一實施例將調焦輪160設置於遠離第二光學系統150的一端,有效防止干涉現象的產生。 The projection screen size set by one embodiment of the present invention can be from 40 吋 to 100 吋, so that the user can use the rotation of the focus wheel 160 to make the image projected on the screen clearer. The tilting semi-circular cam (cam) 1322 is rotated by the focus wheel 160, and then the semi-circular cam 1322 drives the pin 1326 located in the elongated adjustment hole 1324 to move back and forth, so that the front group optical lens can be made. A portion of the lens of assembly 1320 is straight in and out. It is to be noted that, in order to prevent the user from interfering with the image light incident from the second optical system 150 to the screen when adjusting the image sharpness, an embodiment of the present invention sets the focus wheel 160 away from the second optical One end of the system 150 effectively prevents the occurrence of interference phenomena.
另外,受限於可攜式投影裝置短小輕薄的要求與為避免與從第二光學系統150射至螢幕的影像光線發生干涉現象,本發明之一實施例藉由(1)將前群光學透鏡組件1320的上部切除,與(2)第一光學系統130的光軸傾斜於殼體底部水平面來達成。由於在進行光學設計時,影像光主要經由前群光學透鏡組件1320的下部傳播,因此將上部切除並不會影響投影影像光學品質。但要注意的是,如果前群光學透鏡組件切除部分過多,會使得其光學傳播有效區域減少,影響投影影像光學品質。如果前群光學透鏡組件切除部分過少,除可能造成與從第二光學系統150 射至螢幕的影像光線發生干涉現象外,也可能使外殼體無法密合,無法符合客戶對尺寸的要求。因此,要能精準地控制前群光學透鏡組件1320的上部切除,才能避免前述問題的產生。又在本發明之一實施例中,第一光學系統130的光軸與水平面的夾角約為9度。 In addition, limited by the short and light requirements of the portable projection device and to avoid interference with the image light incident from the second optical system 150 to the screen, an embodiment of the present invention uses (1) the front group optical lens The upper portion of the assembly 1320 is cut away, and (2) the optical axis of the first optical system 130 is inclined to the bottom level of the housing. Since the image light mainly propagates through the lower portion of the front group optical lens assembly 1320 during the optical design, the upper portion is cut off without affecting the optical quality of the projected image. However, it should be noted that if the front group optical lens assembly has too many cut-out portions, the optical propagation effective area is reduced, which affects the optical quality of the projected image. If the front group optical lens assembly has too few cut portions, except that it may be caused and removed from the second optical system 150 In addition to the interference of the image light hitting the screen, the outer casing may not be in close contact and cannot meet the customer's size requirements. Therefore, in order to accurately control the upper portion of the front group optical lens assembly 1320, the above problems can be avoided. In still another embodiment of the invention, the angle between the optical axis of the first optical system 130 and the horizontal plane is about 9 degrees.
前群光學透鏡組件1320較佳為切邊圓形,在本實施例中,尤其是指上部切邊圓形的光學透鏡。另外本實施例包括可容納第一光學系統的鏡筒,其亦具有對應於非正圓形光學透鏡的切邊圓形造型構件。 The front group optical lens assembly 1320 is preferably a rounded circle, and in this embodiment, in particular, an upper rounded optical lens. Further, the present embodiment includes a lens barrel accommodating the first optical system, which also has a trimming circular styling member corresponding to the non-spherical optical lens.
請參照圖6和圖7所示,其分別為本發明實施例之一種可攜式投影裝置中顯示反射元件140的調整機構與移除調整螺絲的調整機構的立體示意圖。由於本發明之一實施例之第一光學系統130的光軸傾斜於殼體底部水平面,因此反射元件140必須面對第一光學系統130的光軸傾斜,使得反射元件140的法線平行於第一光學系統130的光軸。再者,反射元件140也必須使得從第一光學系統130入射的影像光水平轉折至第二光學系統150。為配合前述的需求,反射元件140的調整機構藉由三個反射元件調整螺絲1402、1404、1406,進行兩方向的調整。當下方的兩個反射元件調整螺絲1404、1406鎖入反射元件調整機構時,可使得反射元件140面對第一光學系統130的光軸傾斜。又當側邊的兩個反射元件調整螺絲1402、1404鎖入反射元件調整機構時,可調整反射元件140面對第二光學系統150的角度。當鬆開反射元件調整螺絲1402、1404、1406時,利用彈簧1403、1405、1407的彈力即可將反射元件140推離。利用此作用原理,將反射元件調整螺絲1402、1404、1406鎖至適當位置並加以固定後,即完成製造過程中反射元件140的調整作業。 Please refer to FIG. 6 and FIG. 7 , which are perspective views of an adjustment mechanism for displaying the reflective element 140 and an adjustment mechanism for removing the adjustment screw in a portable projection device according to an embodiment of the invention. Since the optical axis of the first optical system 130 of one embodiment of the present invention is inclined to the horizontal plane of the bottom of the housing, the reflective element 140 must be inclined toward the optical axis of the first optical system 130 such that the normal of the reflective element 140 is parallel to the The optical axis of an optical system 130. Furthermore, the reflective element 140 must also cause the image light incident from the first optical system 130 to be horizontally folded to the second optical system 150. To meet the foregoing needs, the adjustment mechanism of the reflective element 140 adjusts the two directions by three reflective element adjustment screws 1402, 1404, 1406. When the lower two reflective element adjustment screws 1404, 1406 are locked into the reflective element adjustment mechanism, the reflective element 140 can be tilted toward the optical axis of the first optical system 130. When the two reflective element adjustment screws 1402, 1404 on the side are locked into the reflective element adjustment mechanism, the angle of the reflective element 140 facing the second optical system 150 can be adjusted. When the reflection element adjustment screws 1402, 1404, 1406 are loosened, the reflection element 140 can be pushed away by the elastic force of the springs 1403, 1405, 1407. By using this principle of action, after the reflective element adjusting screws 1402, 1404, 1406 are locked in position and fixed, the adjustment operation of the reflecting element 140 during the manufacturing process is completed.
在本發明一實施例中,可在散熱機構120的附近,加入一個或多個風扇180,如圖6所示,利用風扇180的轉動帶動氣流,將可更有效率地將LED光源所產生的熱量帶離,避免影響到投影影像光學品質。 In an embodiment of the present invention, one or more fans 180 may be added in the vicinity of the heat dissipation mechanism 120. As shown in FIG. 6, the rotation of the fan 180 drives the airflow, which can more efficiently generate the LED light source. The heat is removed to avoid affecting the optical quality of the projected image.
請參照圖8所示,其為本發明實施例之第二光學系統調整機構的立體示意圖。利用增加墊片(圖中未顯示)於下方的兩個第二光學系統調整螺絲1502、1506上,當螺絲鎖入第二光學系統調整機構時,可使得第二光學系統150上下傾斜。又利用增加墊片(圖中未顯示)於側邊的兩個第二光學系統調整螺絲1502、1504上,當螺絲鎖入第二光學系統調整機構時,可使得第二光學系統150左右傾斜。再者,利用第二光學系統調整螺絲1502和長形調整孔1501的搭配(其他第二光學系統調整螺絲亦有搭配的長形調整孔),可使得第二光學系統150上下平移。另外,藉由四個第二光學系統調整螺絲1502、1504、1506、1508上彈簧(未標號)的均勻受力,可緩衝製造公差與降低影像品質的敏感度。 Please refer to FIG. 8 , which is a perspective view of a second optical system adjustment mechanism according to an embodiment of the present invention. The second optical system 150 can be tilted up and down by the addition of spacers (not shown) to the two second optical system adjustment screws 1502, 1506 below, when the screws are locked into the second optical system adjustment mechanism. Further, the second optical system adjusting screws 1502 and 1504 are added to the side by using a spacer (not shown). When the screw is locked into the second optical system adjusting mechanism, the second optical system 150 can be tilted left and right. Furthermore, the second optical system 150 can be moved up and down by using the second optical system adjusting screw 1502 and the elongated adjusting hole 1501 (the other second optical system adjusting screws also have matching elongated adjusting holes). In addition, the uniform force of the springs (not labeled) on the screws 1502, 1504, 1506, 1508 can be adjusted by the four second optical systems to cushion manufacturing tolerances and reduce image quality sensitivity.
本發明一實施例之第一光學系統、反射元件和第二光學系統,其材質可為模造玻璃、玻璃或塑膠。 The first optical system, the reflective element and the second optical system according to an embodiment of the invention may be made of molded glass, glass or plastic.
圖9為本發明一實施例的投影光學系統的示意圖。如圖9所示,投影光學系統200包括一影像處理元件202、一全反射稜鏡204、一折射單元210、以及一反射單元220。折射單元210可包括位於物側(圖9之左側)與像側(圖9之右側)間的一第一透鏡組212及一第二透鏡組214,第二透鏡組214設置於第一透鏡組212與反射單元220之間,且反射單元220可包括至少一反射器222。第二透鏡組214中的至少一透鏡可沿投影光學系統200的光軸201平移以調焦,且該透鏡以直進直出的方式進行調焦時不會轉動。 Figure 9 is a schematic illustration of a projection optical system in accordance with an embodiment of the present invention. As shown in FIG. 9, the projection optical system 200 includes an image processing element 202, a total reflection 稜鏡 204, a refraction unit 210, and a reflection unit 220. The refraction unit 210 may include a first lens group 212 and a second lens group 214 between the object side (the left side of FIG. 9) and the image side (the right side of FIG. 9), and the second lens group 214 is disposed on the first lens group. 212 is between the reflective unit 220 and the reflective unit 220 can include at least one reflector 222. At least one of the second lens groups 214 is translatable along the optical axis 201 of the projection optical system 200 to focus, and the lens does not rotate when focusing in a straight-in and straight-out manner.
於本發明一實施例中,第一透鏡組212可包括由物側至像側沿光軸201依序排列的9個透鏡L1-L9(如圖10所示)。第一透鏡組212可包括至少一非球面透鏡。第二透鏡組214可包括由物側至像側沿光軸201依序排列的5個透鏡L10-L14(如圖11所示),且第二透鏡組214可包括至少一非球面透鏡。第一透鏡組212可包括由複數個透鏡組合成一體的至少一膠合透鏡件,因此包括第一透鏡組212及第二透鏡組214的折射單元210例如可具有總數目等於或大於10的透鏡件。反射器222可為一具正屈折力的曲面鏡以反射穿過第一透鏡組212及第二透鏡組214後的光線,被反射器222反射後的光線可例如被導向一屏幕(未圖示)。曲面鏡構成的反射器222可具有球面、非球面曲面或自由曲面的鏡面,且其外形完全不限定。 In an embodiment of the invention, the first lens group 212 may include nine lenses L1-L9 (shown in FIG. 10) that are sequentially arranged along the optical axis 201 from the object side to the image side. The first lens group 212 can include at least one aspherical lens. The second lens group 214 may include five lenses L10-L14 (shown in FIG. 11) sequentially arranged from the object side to the image side along the optical axis 201, and the second lens group 214 may include at least one aspherical lens. The first lens group 212 may include at least one cemented lens member that is combined by a plurality of lenses, and thus the refractive unit 210 including the first lens group 212 and the second lens group 214 may have, for example, a total number of lens members equal to or greater than 10. . The reflector 222 can be a curved mirror with positive refractive power to reflect the light passing through the first lens group 212 and the second lens group 214, and the light reflected by the reflector 222 can be guided to a screen, for example. ). The reflector 222 composed of a curved mirror may have a spherical surface, an aspherical surface, or a mirror surface of a free-form surface, and its shape is not limited at all.
於一實施例中,投影光學系統200可滿足下式:0.9<A/B<1.4,其中A為折射單元210與反射單元220兩者於投影光學系統200的光軸201上的距離,且B為折射單元於光軸201上的總長度。於一實施例中,距離A可約等於93.35mm,且長度B可約等於76.5mm。當長度B越小時代表透鏡組件整體所佔空間可越小,另一方面,當距離A越大時,投影光學系統200整體所佔空間會變大但可減少干涉現象產生的機率,該干涉現象例如為離開折射單元210的光線與被反射單元220反射的光線疊合而產生不必要的干涉圖案。因此,上述之A/B的比例範圍係為平衡各個設計因子所訂出的一範圍實施例。 In an embodiment, the projection optical system 200 can satisfy the following formula: 0.9<A/B<1.4, where A is the distance between the refractive unit 210 and the reflective unit 220 on the optical axis 201 of the projection optical system 200, and B Is the total length of the refractive unit on the optical axis 201. In one embodiment, the distance A can be approximately equal to 93.35 mm and the length B can be approximately equal to 76.5 mm. When the length B is small, the space occupied by the lens assembly as a whole can be smaller. On the other hand, when the distance A is larger, the space occupied by the projection optical system 200 as a whole becomes larger, but the probability of interference phenomenon can be reduced, and the interference phenomenon can be reduced. For example, the light rays leaving the refraction unit 210 are superimposed with the light reflected by the reflection unit 220 to generate an unnecessary interference pattern. Therefore, the above range of A/B ratios is a range of embodiments set forth in balancing the various design factors.
如下參考圖10及圖11說明折射單元的一設計實施例。於本實施例中,第一透鏡組212由物側至像側依序包括:具正屈折力的透鏡L1,具負屈折力的透鏡L2,具正屈折力且包括透鏡L3及透鏡L4的雙合透鏡件,具正屈折力且包括透鏡L5、透鏡 L6及透鏡L7的三合透鏡件,具負屈折力且包括透鏡L8及透鏡L9的雙合透鏡件。第二透鏡組214由物側至像側依序包括具正屈折力的透鏡L10,具正屈折力的透鏡L11,具正屈折力的透鏡L12,具負屈折力的透鏡L13及具負屈折力的透鏡L14。透鏡12及透鏡13可沿投影光學系統的光軸平移以調焦,且透鏡12及透鏡13以直進直出方式進行調焦而不會轉動。透鏡L1具有凸面的物側表面S1及凸面的像側表面S2,透鏡L2具有凹面的物側表面S3及凹面的像側表面S4,透鏡L3具有凸面的物側表面S5,透鏡L4具有凸面的物側表面S6及凸面的像側表面S7,透鏡L5具有凸面的物側表面S8,透鏡L6具有凸面的物側表面S9,透鏡L7具有凸面的物側表面S10及凹面的像側表面S11,透鏡L8具有凹面的物側表面S13,透鏡L9具有凹面的物側表面S14及凹面的像側表面S15,透鏡L10具有凹面的物側表面S16及凸面的像側表面S17,透鏡L11具有凸面的物側表面S18及凹面的像側表面S19,透鏡L12具有凸面的物側表面S20及凹面的像側表面S21,透鏡L13具有凹面的物側表面S22及凹面的像側表面S23,透鏡L14具有凸面的物側表面S24及凹面的像側表面S25。一孔徑光闌218位於透鏡L7與透鏡L8之間。於本設計例中,第一透鏡組212中的透鏡L1可為非球面透鏡,第二透鏡組214中的透鏡L12及透鏡L14可為非球面透鏡,且其他的透鏡L2-L11、L13可為球面透鏡。折射單元210的光圈值(f-number)例如可不大於2,折射單元210的奈奎斯特頻率(Nyquist frequency)例如可等於或大於70線對/毫米,且一較佳範圍可為70-150線對/毫米。於一實施例中,折射單元210的奈奎斯特頻率(Nyquist frequency)可約為95線對/毫米,且光圈值(f-number)可約為1.4。 A design embodiment of the refraction unit will be described with reference to Figs. 10 and 11 as follows. In the present embodiment, the first lens group 212 includes, from the object side to the image side, a lens L1 having a positive refractive power, a lens L2 having a negative refractive power, a double lens having a positive refractive power and including a lens L3 and a lens L4. Lens unit with positive refractive power and including lens L5, lens A triplet lens member of L6 and L7, having a negative refractive power and including a lens L8 and a lens L9. The second lens group 214 sequentially includes a lens L10 having a positive refractive power, a lens L11 having a positive refractive power, a lens L12 having a positive refractive power, a lens L13 having a negative refractive power, and a negative refractive power from the object side to the image side. Lens L14. The lens 12 and the lens 13 are translatable along the optical axis of the projection optical system to focus, and the lens 12 and the lens 13 are focused in a straight-in and straight-out manner without rotation. The lens L1 has a convex object side surface S1 and a convex image side surface S2, the lens L2 has a concave object side surface S3 and a concave image side surface S4, the lens L3 has a convex object side surface S5, and the lens L4 has a convex surface. The side surface S6 and the image side surface S7 of the convex surface, the lens L5 has a convex object side surface S8, the lens L6 has a convex object side surface S9, the lens L7 has a convex object side surface S10 and a concave image side surface S11, and the lens L8 The object side surface S13 having a concave surface having a concave object side surface S14 and a concave image side surface S15, the lens L10 having a concave object side surface S16 and a convex image side surface S17, and the lens L11 having a convex object side surface S18 and the image side surface S19 of the concave surface, the lens L12 has a convex object side surface S20 and a concave image side surface S21, the lens L13 has a concave object side surface S22 and a concave image side surface S23, and the lens L14 has a convex object side The surface S24 and the image side surface S25 of the concave surface. An aperture stop 218 is located between lens L7 and lens L8. In this design example, the lens L1 in the first lens group 212 may be an aspherical lens, the lens L12 and the lens L14 in the second lens group 214 may be aspherical lenses, and the other lenses L2-L11, L13 may be Spherical lens. The aperture value (f-number) of the refraction unit 210 may be, for example, not more than 2, and the Nyquist frequency of the refraction unit 210 may be, for example, equal to or greater than 70 line pairs/mm, and a preferred range may be 70-150. Pair/mm. In one embodiment, the Nyquist frequency of the refractive unit 210 can be about 95 line pairs/mm, and the aperture value (f-number) can be about 1.4.
上述設計例的光學參數值顯示於如下的表1,且上述
的非球面透鏡的非球面曲線方程式表示如下:
再者,於一實施例中,反射器222可為一非球面鏡,且非球面鏡的曲線方程式表示如下:
圖12顯示本發明另一實施例的投影光學系統的示意圖。如圖12所示,投影光學系統300包括一折射單元310及一反射單元320,反射單元320可包括兩個反射器322、324,且於本實施例中,反射器322為一平面鏡且反射器324為一曲面鏡,構成反射器324的曲面鏡的外形並不限定且例如可為一非球面鏡,且亦適用前述的非球面鏡方程式及表3的設計參數。光線I1或光線I2於穿過折射單元310後再被反射器322(例如平面鏡)及反射器324(例如曲面鏡)依序反射後離開反射單元320。換言之,光線I1或光線I2於離開反射單元320前最後一個遭遇到反射器為反射器324,且光線I1或光線I2由最後一個遭遇的反射器324反射後導向一屏幕(未圖示)。因此,折射單元310與最後一個反射器324兩者於投影光學系統300的一光軸301上的距離P,等於折射單元310與反射器322於光軸301上的距離P1加上反射器322與反射器324於光軸301上的距離P2(P=P1+P2)。 Figure 12 is a schematic view showing a projection optical system according to another embodiment of the present invention. As shown in FIG. 12, the projection optical system 300 includes a refraction unit 310 and a reflection unit 320. The reflection unit 320 can include two reflectors 322 and 324. In the embodiment, the reflector 322 is a plane mirror and the reflector 324 is a curved mirror, and the shape of the curved mirror constituting the reflector 324 is not limited and can be, for example, an aspherical mirror, and the aspherical mirror equation and the design parameters of Table 3 are also applicable. The light I1 or the light I2 passes through the refraction unit 310 and is then sequentially reflected by the reflector 322 (for example, a plane mirror) and the reflector 324 (for example, a curved mirror) to leave the reflection unit 320. In other words, the last encounter of the ray I1 or the ray I2 before leaving the reflecting unit 320 is that the reflector is the reflector 324, and the ray I1 or the ray I2 is reflected by the last encountered reflector 324 and then directed to a screen (not shown). Therefore, the distance P between the refraction unit 310 and the last reflector 324 on an optical axis 301 of the projection optical system 300 is equal to the distance P1 between the refraction unit 310 and the reflector 322 on the optical axis 301 plus the reflector 322 and The distance P2 of the reflector 324 on the optical axis 301 (P = P1 + P2).
因此,於一實施例中,投影光學系統300可滿足下式:0.9<P/B<1.4,其中P為折射單元310與光線於反射單元320中最後一個遭遇到的反射器(反射器324),兩者於投影光學系統300的光軸301上的距離,且B為折射單元310於光軸301上的總長度。 Therefore, in an embodiment, the projection optical system 300 can satisfy the following formula: 0.9<P/B<1.4, where P is the reflector (reflector 324) encountered by the refractive unit 310 and the last one of the light in the reflective unit 320. The distance between the two on the optical axis 301 of the projection optical system 300, and B is the total length of the refractive unit 310 on the optical axis 301.
圖13至圖15顯示圖12的投影光學系統的折射單元的光學模擬結果。圖13為橫向色差曲線圖,圖14及圖15為光學傳遞函數曲線圖,其橫軸為以線對數/毫米表示的空間頻率(spatial frequency in cycles per millimeter),縱軸為光學轉移函數值。圖13至圖15所顯示出的模擬結果均在標準的範圍內,亦即本發明實施例的投影光學系統可具有良好的成像品質。 13 to 15 show optical simulation results of the refractive unit of the projection optical system of Fig. 12. 13 is a lateral chromatic aberration diagram, and FIGS. 14 and 15 are graphs of optical transfer functions, the horizontal axis of which is a spatial frequency in cycles per millimeter, and the vertical axis is an optical transfer function value. The simulation results shown in FIGS. 13 to 15 are all within the standard range, that is, the projection optical system of the embodiment of the present invention can have good image quality.
本發明之實施例藉由球面透鏡、非球面透鏡與反射鏡組成投影光學系統,可有效縮短焦距使鏡身減小並可改善像差,且投影至各尺寸屏幕時具有良好的解析度。 The embodiment of the invention comprises a spherical lens, an aspherical lens and a mirror to form a projection optical system, which can effectively shorten the focal length, reduce the lens body and improve the aberration, and has a good resolution when projected to each size screen.
需注意表1-3所列出的參數值僅為例示而非限制本發明。雖然本發明已以較佳實施例揭露如上,然其並非用以限定本發明,任何所屬技術領域中具有通常知識者,針對本發明實施例之設計參數或設定進行更動,均未脫離本發明之精神和範圍。因此,任何與本發明實施例結構相同的透鏡系統,即使具有不同的設計參數或設定仍為本發明之保護範圍所涵蓋。本發明之保護範圍當視後附之申請專利範圍所界定者為準。 It is noted that the parameter values listed in Tables 1-3 are merely illustrative and not limiting. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art may make modifications to the design parameters or settings of the embodiments of the present invention without departing from the invention. Spirit and scope. Therefore, any lens system having the same structure as the embodiment of the present invention, even if it has different design parameters or settings, is covered by the protection scope of the present invention. The scope of the invention is defined by the scope of the appended claims.
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