201219885 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種變焦投影鏡頭。 [0002] 〇 [0003] [0004] ❹ 【先前技術】 現在許多投影機具備變焦功能，以適應不同的投影場所 ’如空曠的商業場所或狹小的家庭娛樂場所。這種具有 變焦功能的投影機鏡頭通常包括複數個透鏡組，通過?文 變透鏡組之間的相對位置改變變焦投影鏡頭的有欵焦距 ’從而實現變焦功能。但是，如果各透鏡組的光焦度分 配不合理，可能會導致：（1)無法有效修正像差和畸變. (2 )無法滿足變焦投影鏡頭縮小端（近DMD端）不滿足遠心 (Telecentric)成像要求。 【發明内容】 有黎於此，有必要提供一種可在變焦過程中維持高解析 度的變焦投影鏡頭。 —種變焦投影鏡頭，其從放大端到縮小端依次包括：_ 個具有負光焦度的第一透鏡組、一個具有正光焦度的第 二透鏡組、一個具有正光焦度的第三透鏡組、—個具有 負光焦度的第四透鏡組及一個具有it光焦度的第五透鏡 組。所述第五透鏡組固定設置’所述第一透鏡組、所述 第二透鏡組、所述第三透鏡組及所述第四透鏡級移動設 置。所述變焦投影鏡頭滿足以下條件式： 1.0<|F1/Fw|<1.3 ; 2.5〈|F3/Fwl<2.7 ;2.81<|F5/Fw|<2.83 ; 〇.21<lF2/F4 丨 <0·24 ;其中， Fl、F2、F3、F4、F5分別為第一透鏡組、第二透鏡組 099138029 表單編號A0101 第5頁/共31頁 0992066252-0 201219885 第三透鏡組、第四透鏡組、第五透鏡組的有效焦距，Fw 為變焦投影鏡頭在廣角端的有效焦距。 [0005] 在上述條件式内對該變焦投影鏡頭的光焦度進行合理分 配，以保證該變焦投影鏡頭在變焦過程中維持高解析度 的要求。 【實施方式】 [0006] 下面將結合附圖，對本發明作進一步的詳細說明。 [0007] 請參閱圖1及圖2，其為本發明實施方式所提供的變焦投 影鏡頭100的示意圖，所述變焦投影鏡頭100的廣角端半 視場角ω大於等於29度。本實施方式中，該變焦投影鏡 頭100從放大端至縮小端（近DMD端）依次包括：一個具有 負光焦度的第一透鏡組10、一個具有正光焦度的第二透 鏡組20、一個具有正光焦度的第三透鏡組30、一個具有 負光焦度的第ra透鏡組40及一個具有正光焦度的第五透 鏡組50。其中，第一透鏡組10、第二透鏡組20、第三透 鏡組30及第四透鏡組40沿光轴移動設置，用於改變變焦 投影鏡頭100的有效焦距，實現變焦功能。所述第五透鏡 組50固定設置，用於防止變焦過程中DMD受到碰撞。另外 ，通過第一透鏡組10、第二透鏡組20、第三透鏡組30及 第四透鏡組40四個透鏡組的移動可以保證整個焦距範圍 内成像品質的一致性。其中第一透鏡組10係調焦透鏡組 〇 [0008] 本實施方式中，所述變焦投影鏡頭100應用於DMD投影儀 ，投影時，DMD調製的投影信號光自成像面9 9依次經第五 透鏡組50、第四透鏡組40、第三透鏡組30、第二透鏡組 099138029 表單編號 A0101 第 6 頁/共 31 頁 0992066252-0 201219885 2 0及第一透鏡組1 〇，投射於螢幕（圖未示）上便可得到投 影畫面。具體地，DMD投影儀投影時，成像面99投射出的 投景;號光依次經過保護破壤9 8、第五平板玻璃9 7、第 四平板玻璃96、第三平板玻螭95、第二平板玻璃94及第 —平板玻璃93後進入變焦投影鏡頭1〇()。所述第五平板玻 璃97、第四平板玻璃96、第三平板玻璃95、第二平板玻 璃94及第一平板玻璃93可以根據使用需要鍍不同功能的 膜層，例如濾光膜。 [0009] Ο [0010] 具體地’變焦投影鏡頭1〇〇滿足條件式： (1) 1.〇<|Fl/Fw丨<1.2 ; [0011] (2) 2.5<|F3/Fw|<2.7 ； [0012] (3) 2.81<|F5/Fw|<2.83 ； [0013] (4) 0.21〈丨F2/F4|<〇.24 。 [0014] 其中，F卜…仏财陳別為第一:透鏡組心第二 ❹ 透鏡組20、第三魏崩1顧鏡組4()及第五透鏡組 的有效焦距，_變焦投影鏡頭⑽廣角端的有效焦距 0 [0015] 在條件式⑴〜⑷内對變焦投影鏡頭ι〇〇的光焦度進行合 = 透鏡組Μ度與變焦投影鏡頭100光焦度 方面’保證變焦投影鏡頭⑽在變焦範圍内 /、有較讀析度（可在變焦過程中維持高解析度）；另一 方面，保證變焦投影鏡頭1〇〇 . % 滿足遠心成像的要 求a 099138029 表單編號Α0101 帛7頁/共31頁 0992066252-0 201219885 [0016] [0017] [0018] [0019] [0020] [0021] [0022] [0023] 099138029 優選地，為控制變焦投影鏡頭100產生的色差，變焦投影 鏡頭100還滿足條件式： (5) 1.6<(Nd4+Nd5)/2 ； (6) 40<(Yd4-Vd5)<46 > 其中，Nd4為第四透鏡對d光（波長為587. 6奈米，下同） 的折射率，Vd4為第四透鏡對d光的阿貝數（Abbe number) ， Nd5 為所述第五透鏡對 d 光的折射率 ’ Vd5 為所述 第五透鏡對d光的阿貝數。 具體地’所述第一透鏡組10從放大端到縮小端依次包括 具有負光焦度的第一透鏡11、具有負光焦度的第二透鏡 1 2，以合理分配所述第一透鐃組1 〇的光焦度。所述第一 透鏡11為一個非球面塑膠鏡片。因為所述第一透鏡11遠 離投影機熱源’與空氣直接接觸，溫度較變焦投影鏡頭 1 0 0的其他鏡片低’受熱變形小，所以考慮採用塑膠鏡片 〇 所述第二透鏡組20從放大端到縮小端依次包括具有正光 焦度的第三透鏡21、具有正光焦度的第四透鏡22及具有 負光焦度的第五透鏡23，以合理分配第二透鏡組20的光 焦度。所述第四透鏡22與第五透鏡23膠合成膠合透鏡。 所述第三透鏡組30包括具有正光焦度的第六透鏡。 所述第四透鏡組4 0從放大端到縮小端依次包括具有負光 焦度的第七透鏡41、具有負光焦度的第八透鏡42、具有 正光焦度的第九透鏡43及具有正光焦度的第十透鏡44， 表單編號A0101 第8頁/共31頁 0992066252-0 201219885 [0024] 以合理分配所述第四透鏡組40的光焦度。 第五透鏡組50包括具有正光焦度的第十一透鏡。 [0025] 更加具體地，所述變焦投影鏡頭100還包括一個設置於第 五透鏡23與第三透鏡組30之間（即第二透鏡組20與第三透 鏡組30之間）的固定孔徑的光闌91(Aperture stop)， 以限制軸外光線由第三透鏡組30進入第五透鏡23而產生 較嚴重的畸變及場曲。另外，光闌91使得經過第三透鏡 組30的光線更加對稱，利於修正蓉差（coma)。 〇 [0026] 為減小溫度變化對後焦的影響，除第一透鏡11之外的其 他透鏡都採用玻璃材料製成。 [0027] 為了具有較寬鬆的公差，除第一透鏡11之外的其他透鏡 均為球面玻璃鏡片。 [0028] 以透鏡表面中心為原點，光軸為X軸，透鏡表面的非球面 面型運算式為： [0029] G X — ^+ Υ l + ^l-(k-hl)c2h2 u [0030] 其中，C為鏡面表面中心的曲率， y- η = 4υ2+ζ2 為從光轴到透鏡表面的高度，k係二次曲面係數，j為 Λ 第i階的非球面面型係數。 [0031] 該變焦投影鏡頭100各光學元件滿足表1、表2及表3的條 099138029 表單編號A0101 第9頁/共31頁 0992066252-0 201219885 件0 [0032] [0033] [0034] [0035] [0036] [0037] [0038] [0039] [0040] [0041] [0042] [0043] 以下結合圖3至圖10，以具體實施方式進一步說明變焦投 影鏡頭100。表1至表3中各參數的含義如下： F :變焦投影鏡頭100的有效焦距； D4 :第一透鏡組10與第二透鏡組20的表面間距，即第二 透鏡12像側表面與第三透鏡21物側表面之間的距離； D10 :第二透鏡組20與第三透鏡組30的表面間距，即第五 透鏡23像側表面與第三透鏡組30物側表面之間的距離； D12 :第三透鏡組30與第四透鏡組40的表面間距，即第三 透鏡組30像側表面與第七透鏡41物侧表面之間的距離； D19 :第四透鏡組40與第五透鏡組50的表面間距，即第十 透鏡44像側表面與所述第五透鏡組50物侧表面之間的距 離； FM : F number 數；201219885 VI. Description of the Invention: [Technical Field of the Invention] [0001] The present invention relates to a zoom projection lens. [0002] 0003 [0003] [0004] [Prior Art] Many projectors now have a zoom function to accommodate different projection locations, such as open commercial spaces or small family entertainment venues. Such a zoom lens projector lens usually includes a plurality of lens groups, and the zoom focus is achieved by changing the relative focal length of the zoom projection lens by the relative position between the lens groups. However, if the power distribution of each lens group is unreasonable, it may result in: (1) the aberration and distortion cannot be effectively corrected. (2) The zoom projection lens (near DMD end) cannot satisfy the telecentric (Telecentric) Imaging requirements. SUMMARY OF THE INVENTION It is necessary to provide a zoom projection lens that can maintain a high resolution during zooming. a zoom projection lens comprising, in order from the amplification end to the reduction end, a first lens group having a negative power, a second lens group having a positive power, and a third lens group having a positive power. a fourth lens group having a negative power and a fifth lens group having an it power. The fifth lens group is fixedly disposed to the first lens group, the second lens group, the third lens group, and the fourth lens stage movement setting. The zoom projection lens satisfies the following conditional expression: 1.0 <|F1/Fw|<1.3;2.5<|F3/Fwl<2.7;2.81<|F5/Fw|<2.83;〇.21<lF2/F4丨<0·24; wherein, Fl, F2, F3, F4, F5 are the first lens group and the second lens group respectively 099138029 Form No. A0101 Page 5 / Total 31 Page 0992066252-0 201219885 Third lens group, The effective focal length of the four lens group and the fifth lens group, and Fw is the effective focal length of the zoom projection lens at the wide angle end. [0005] The power of the zoom projection lens is properly allocated in the above conditional expression to ensure that the zoom projection lens maintains a high resolution requirement during zooming. [Embodiment] The present invention will be further described in detail below with reference to the accompanying drawings. Please refer to FIG. 1 and FIG. 2 , which are schematic diagrams of a zoom projection lens 100 according to an embodiment of the present invention. The wide-angle end half-angle ω of the zoom projection lens 100 is greater than or equal to 29 degrees. In this embodiment, the zoom projection lens 100 includes, in order from the amplification end to the reduction end (near DMD end), a first lens group 10 having a negative refractive power, a second lens group 20 having a positive power, and a A third lens group 30 having positive power, a th-th lens group 40 having negative power, and a fifth lens group 50 having positive power. The first lens group 10, the second lens group 20, the third lens group 30, and the fourth lens group 40 are disposed along the optical axis for changing the effective focal length of the zoom projection lens 100 to realize the zoom function. The fifth lens group 50 is fixedly disposed to prevent the DMD from being collided during zooming. Further, the movement of the four lens groups by the first lens group 10, the second lens group 20, the third lens group 30, and the fourth lens group 40 can ensure the consistency of the image quality over the entire focal length range. The first lens group 10 is a focus lens group. [0008] In the embodiment, the zoom projection lens 100 is applied to a DMD projector. When projecting, the DMD modulated projection signal light is sequentially passed through the imaging surface 9 through the fifth Lens group 50, fourth lens group 40, third lens group 30, second lens group 099138029 Form No. A0101 Page 6 of 31 0992066252-0 201219885 2 0 and the first lens group 1 〇, projected on the screen (Fig. The projected picture can be obtained without being shown. Specifically, when the DMD projector projects, the projection surface projected by the imaging surface 99; the light sequentially passes through the protection of the broken soil 98, the fifth flat glass 9 7 , the fourth flat glass 96 , the third flat glass 95 , the second After the flat glass 94 and the first flat glass 93 enter the zoom projection lens 1 (). The fifth flat glass 97, the fourth flat glass 96, the third flat glass 95, the second flat glass 94, and the first flat glass 93 may be plated with different functions, such as a filter film, depending on the use. [0009] Specifically, the 'zoom projection lens 1' satisfies the conditional expression: (1) 1. 〇 <|Fl/Fw丨<1.2; [0011] (2) 2.5<|F3/Fw |<2.7; (3) 2.81 <|F5/Fw|<2.83; [0013] (4) 0.21 <丨F2/F4|<〇.24. [0014] Among them, F Bu... 仏财陈别为第一: lens group second ❹ lens group 20, third Wei collapse 1 Gu group 4 () and the fifth lens group effective focal length, _ zoom projection lens (10) Effective focal length at the wide-angle end 0 [0015] In the conditional expressions (1) to (4), the power of the zoom projection lens ι is combined = the lens group twist and the zoom projection lens 100 in terms of power 'guaranteed zoom projection lens (10) Within the zoom range /, with a higher degree of readout (can maintain high resolution during zooming); on the other hand, ensure that the zoom projection lens 1 〇〇. % meets the requirements of telecentric imaging a 099138029 Form number Α 0101 帛 7 pages / total [0018] [0023] [0023] [0023] [0023] [0023] [0023] [0023] Preferably, in order to control the chromatic aberration generated by the zoom projection lens 100, the zoom projection lens 100 is also satisfied. Conditional formula: (5) 1.6 < (Nd4 + Nd5) / 2; (6) 40 < (Yd4-Vd5) < 46 > where Nd4 is the fourth lens pair d light (wavelength is 587.6 nm , the same refractive index, Vd4 is the Abbe number of the fourth lens to d light, and Nd5 is the fifth lens pair The refractive index 'dVd5' of d light is the Abbe number of the fifth lens pair d light. Specifically, the first lens group 10 includes, in order from the enlarged end to the reduced end, a first lens 11 having a negative refractive power and a second lens 12 having a negative refractive power to reasonably distribute the first lens. Group 1 〇 power. The first lens 11 is an aspherical plastic lens. Since the first lens 11 is in direct contact with the heat source of the projector, the temperature is lower than that of the other lenses of the zoom projection lens 100, and the thermal deformation is small. Therefore, it is considered to adopt the plastic lens 〇 the second lens group 20 from the amplification end. The third lens 21 having positive power, the fourth lens 22 having positive power, and the fifth lens 23 having negative power are sequentially included to the reduction end to appropriately distribute the power of the second lens group 20. The fourth lens 22 and the fifth lens 23 are glued into a cemented lens. The third lens group 30 includes a sixth lens having positive power. The fourth lens group 40 includes, in order from the amplification end to the reduction end, a seventh lens 41 having a negative refractive power, an eighth lens 42 having a negative refractive power, a ninth lens 43 having a positive refractive power, and a positive light. The tenth lens 44 of the power, Form No. A0101, Page 8 of 31, 0992066252-0 201219885 [0024] The power of the fourth lens group 40 is rationally distributed. The fifth lens group 50 includes an eleventh lens having positive power. [0025] More specifically, the zoom projection lens 100 further includes a fixed aperture disposed between the fifth lens 23 and the third lens group 30 (ie, between the second lens group 20 and the third lens group 30). An aperture stop 91 is used to restrict the off-axis light from entering the fifth lens 23 by the third lens group 30 to cause more severe distortion and curvature of field. In addition, the aperture 91 makes the light passing through the third lens group 30 more symmetrical, which facilitates correction of the coma.为 [0026] In order to reduce the influence of temperature change on the back focus, other lenses than the first lens 11 are made of a glass material. [0027] In order to have looser tolerances, all lenses except the first lens 11 are spherical glass lenses. [0028] Taking the center of the lens surface as the origin and the optical axis as the X-axis, the aspherical surface of the lens surface is calculated as: [0029] GX — ^+ Υ l + ^l-(k-hl)c2h2 u [0030] Where C is the curvature of the center of the mirror surface, y- η = 4υ2+ζ2 is the height from the optical axis to the lens surface, k is the quadric surface coefficient, and j is the aspherical surface coefficient of the ith first order. [0031] Each optical component of the zoom projection lens 100 satisfies the bars of Table 1, Table 2, and Table 0. 099138029 Form No. A0101 Page 9 / Total 31 Pages 0992066252-0 201219885 Pieces 0 [0032] [0033] [0034] [0035 [0036] [0043] [0043] [0043] [0043] The zoom projection lens 100 is further described in the following detailed description with reference to FIGS. 3 to 10. The meanings of the parameters in Tables 1 to 3 are as follows: F: effective focal length of the zoom projection lens 100; D4: surface pitch of the first lens group 10 and the second lens group 20, that is, the image side surface of the second lens 12 and the third a distance between the object side surfaces of the lens 21; D10: a surface distance between the second lens group 20 and the third lens group 30, that is, a distance between the image side surface of the fifth lens 23 and the object side surface of the third lens group 30; D12 : a surface distance between the third lens group 30 and the fourth lens group 40, that is, a distance between the image side surface of the third lens group 30 and the object side surface of the seventh lens 41; D19: the fourth lens group 40 and the fifth lens group a surface pitch of 50, that is, a distance between the image side surface of the tenth lens 44 and the object side surface of the fifth lens group 50; FM : F number number;
NoNo
Nd :對應透鏡對d光的折射率； vd :對應透鏡對d光的阿貝數。 本實施方式中的變焦投影鏡頭100滿足表1、表2及表3所 列的條件。 表1 變焦投 F D4 D10 D12 D19 影鏡頭 100狀 表單編號A0101 第10頁/共31頁 0992066252-0 099138029 201219885Nd : the refractive index of the lens corresponding to the d light; vd : the Abbe number of the lens corresponding to the d light. The zoom projection lens 100 in the present embodiment satisfies the conditions listed in Table 1, Table 2, and Table 3. Table 1 Zoom projection F D4 D10 D12 D19 Shadow lens 100-shaped Form No. A0101 Page 10 of 31 0992066252-0 099138029 201219885
表面 R (mm) D (mm) Nd vd 第一透鏡 11放大端 表面 25.366 1. 38 1. 531 55. 75 第一透鏡 11縮小端 表面 12.695 8. 695 第二透12 鏡放大端 表面 -46.313 1. 796 1.516 64.198 第二透鏡 1 2縮小端 表面 39.849 Μ (參表 1) 第三透鏡 21放大端 表面 82.939 4.5517 1.805 25. 45 第三透鏡 21縮小端 表面 -56.058 0.1309 表單編號A0101 第11頁/共31頁 0992066252-0 態 廣角倍 18.2 5.215 16. 39 13.51 2. 767 0. 168 率 3 8 66 4 攝遠倍 23. 49 5. 941 10. 50 9. 951 7. 811 7. 838 率 8 9 表2 099138029 201219885 第四透鏡 22放大端 表面 40. 56 4.39599 1. 48 70. 44 第四透鏡 2 2縮小端 表面（第 五透鏡23 放大端表 面） -38. 189 1. 1 0259 1.805 25. 45 第五透鏡 23縮小端 表面 -188.675 0.120181 7 光闌91表 面 無窮大 D10 (參 表1) — 一 第三透鏡 組3 0放大 端表面 45.786 5. 405 1. 48 70. 44 第三透鏡 組3 0縮小 端表面 -46.632 D12 (參 表1) 第七透鏡 41放大端 表面 58.709 0.8968 1. 698 30.05 第七透鏡 41縮小端 表面 22.539 6.0639 表單編號A0101 第12頁/共31頁 0992066252-0 099138029 201219885 第八透鏡 42放大端 表面 -16.505 4.9438 1. 846 23. 78 第八透鏡 42縮小端 表面（第 九透鏡43 放大端表 面） 53.026 5.6857 1. 48 70. 44 第九透鏡 43縮小端 -19.096 0. 1309 一一 — 第十透鏡 44放大端 表面 120.809 3.1272 1. 846 23. 78 第十透鏡 44縮小端 表面 -58.9558 D19 (參 表1) 第五透鏡 組5 0放大 端表面 35.3928 4. 319 1.603 60. 64 第五透鏡 組5 0縮小 端表面 239.1936 3.85 棱鏡92放 大端表面 無窮大 21 1. 52 64.16 棱鏡9 2縮 無窮大 1. 24 一一 —— 表單編號A0101 第13頁/共31頁 0992066252-0 099138029 201219885 小端表面 第一平板 玻璃93放 大端表面 無窮大 0. 55 1. 52 68 第一平板 玻璃9 3縮 小端表面 第二平板 玻璃94放 大端表面 無窮大 0.215 1.51 68 第二平板 玻璃9 4縮 小端表面 無窮大 1.9 第三平板 玻璃95放 大端表面 無窮大 0.5 1. 458 67.82 第三平板 玻璃9 5縮 小端表面 第四平板 玻璃96放 大端表面 無窮大 0.2 1.51 68 第四平板 玻璃96放 大端表面 無窮大 3.087 第五平板 無窮大 0.7 1. 458 67. 82 表單編號A0101 第14頁/共31頁 0992066252-0 099138029 201219885 Ο [0045] 玻璃97放 大端表面 第五平板 玻璃97縮 小端表面 (保護玻璃 98放大端 表面） 保護玻璃 98縮小端 表面（成 像面99) 表3 無窮大 無窮大 1.51 68 非球面係數 表面 第一透鏡組10物側表面Surface R (mm) D (mm) Nd vd First lens 11 enlarged end surface 25.366 1. 38 1. 531 55. 75 First lens 11 reduced end surface 12.695 8. 695 Second through 12 mirror enlarged end surface - 46.313 1 796 1.516 64.198 Second lens 1 2 reduced end surface 39.849 Μ (Refer to Table 1) Third lens 21 enlarged end surface 82.939 4.5517 1.805 25. 45 Third lens 21 reduced end surface -56.058 0.1309 Form No. A0101 Page 11 / Total Page 31 0992066252-0 State wide angle 18.2 5.215 16. 39 13.51 2. 767 0. 168 Rate 3 8 66 4 Telephoto 23.49 5. 941 10. 50 9. 951 7. 811 7. 838 Rate 8 9 2 099138029 201219885 Fourth lens 22 enlarged end surface 40. 56 4.39599 1. 48 70. 44 Fourth lens 2 2 reduced end surface (fifth lens 23 enlarged end surface) -38. 189 1. 1 0259 1.805 25. 45 Five lens 23 reduced end surface - 188.675 0.120181 7 aperture 91 surface infinity D10 (see Table 1) - a third lens group 3 0 amplification end surface 45.786 5. 405 1. 48 70. 44 third lens group 3 0 reduction end Surface -46.632 D12 (see Table 1) Face 58.709 0.8968 1. 698 30.05 Seventh lens 41 reduced end surface 22.539 6.0639 Form number A0101 Page 12 / Total 31 page 0992066252-0 099138029 201219885 Eighth lens 42 enlarged end surface - 16.505 4.9438 1. 846 23. 78 Eighth lens 42 reduced end surface (ninth lens 43 enlarged end surface) 53.026 5.6857 1. 48 70. 44 ninth lens 43 reduced end - 19.096 0. 1309 one - tenth lens 44 enlarged end surface 120.809 3.1272 1. 846 23. 78 Tenth lens 44 is reduced to the end surface -58.9558 D19 (refer to Table 1) Fifth lens group 5 0 enlarged end surface 35.3928 4. 319 1.603 60. 64 Fifth lens group 5 0 reduced end surface 239.1936 3.85 Prism 92 enlarged end surface infinity 21 1. 52 64.16 Prism 9 2 infinity 1. 24 One-one - Form No. A0101 Page 13 of 31 0992066252-0 099138029 201219885 Small end surface first flat glass 93 enlarged end surface infinity 0. 55 1. 52 68 First flat glass 9 3 narrow end surface second flat glass 94 enlarged end surface infinity 0.215 1.51 68 second flat glass 9 4 narrow end surface infinity 1.9 The third flat glass 95 enlarges the end surface infinity 0.5 1. 458 67.82 Third flat glass 9 5 narrowed end surface Fourth flat glass 96 enlarged end surface infinity 0.2 1.51 68 Fourth flat glass 96 enlarged end surface infinity 3.087 Fifth flat infinity 0.7 1. 458 67. 82 Form No. A0101 Page 14 of 31 0992066252-0 099138029 201219885 Ο [0045] Glass 97 enlarged end surface Fifth flat glass 97 reduced end surface (protective glass 98 enlarged end surface) Protective glass 98 shrinks End surface (imaging surface 99) Table 3 Infinity infinity 1.51 68 Aspheric coefficient surface First lens group 10 object side surface
G 099138029 κ=0.2002793; Α4=-5.951076x10' A6=-l.035487x10' Α8 = -2. 1 05335x1 0' Α10=-6.272113x10 A12=l.737729x10 Α14=-3.338993x10 Α16=-5.721236x10 11 -14 15 —18 -21 第一透鏡組10像側表面 Κ=-0.4183628 ； Α4=-3.529410χ10-6; A6=-l.076255χ10-8; 表單編號Α0101 第15頁/共31頁 0992066252-0 201219885 A8=-l.544430xl0"10； A10 = -6. 120549xl0-13； A12=-l.052326x10—15; Α14 = 1· 235331x1 0 —16; Α1 6 = -5. 397007χ10-19 本實施方式的變焦投影鏡頭100的球差特性曲線、場曲特 性曲線、畸變特性曲線及橫向色差特性曲線分別如圖3至 圖10所示（圖3-6對應廣角倍率的變焦投影鏡頭1〇〇，圖 7-10對應攝遠倍率的變焦投影鏡頭〗〇〇)。圖3、7中，曲 線F ’ d及C分別為^光（波長為486. 1奈米，下同）、d光及 C光（波長為656. 3奈米，下_)繹變焦操義_頭1〇()的球 差特性曲線（下同）。可見，實施方式的變焦投影鏡頭1〇〇 對可見光（40 0-70 Onm)產生的球差被控制在-0. lmm〜0· 1mm間。圖4、8中，曲線T及S為子午場曲 (Tangential field curvature)特性曲線及弧矢場曲 (Sagittal field curvature )特性曲線（下同）。可 見，子午場曲值及弧矢場曲值被控制在—0 2mm〜〇 2mm間 。圖5、9中，曲線為畸變特性曲線（下同）。可見，畸變 量被控制在-1. 5%〜1. 5%間。圖6、10中，兩條曲線分別 為波長為F光及C光經變焦投影鏡頭1〇〇的橫向色差特性曲 線（下同），d光經變焦投影鏡頭1〇〇的橫向色差特性曲線 與縱軸重合（下同）。可見，實施方式的變焦投影鏡頭1〇〇 對可見光產生的橫向色差被控制在-1 〇微米（Micron， um)~l〇um間。綜前’在保證足夠的後焦距及縮小端遠心 成像的前提下’變焦投影鏡頭100在變焦範圍内，其產生 的球差、場曲、畸變及橫向色差被控制（修正）在較小的 099138029 表單編號A0101 第16頁,/共31頁 0992066252-0 201219885 〇 〇 範圍内。 [0046] 在上述條件式内對該變焦投影鏡頭的光焦度進行合理分 配，以保證該變焦投影鏡頭在變焦過程中維持高解析度 的要求。 [0047] 另外，本領域技術人員可在本發明精神内做其他變化， 但是，凡依據本發明精神實質所做的變化，都應包含在 本發明所要求保護的範圍之内。 【圖式簡單說明】 圖1為本發明的變焦投影鏡頭採用廣角倍率時的系統構成 示意圖； 圖2為本發明的變焦投影鏡頭採用攝遠#考湯的系統構成 示意圖； 圖3為本圖1的變焦投影鏡頭採用廣角倍率時的球差 (Spherical aberration)特性曲線圖；： 圖4為圖1的變焦投影鏡頭採用廣角倍率時的場曲（Field curvature)特性曲線圖； 圖5為圖1的變焦投影鏡頭採用廣角倍率時的畸變 (Distortion)特性曲線圖； 圖6為圖1的變焦投影鏡頭採用廣角倍率時的橫向色差 (Lateral chromatic aberration)特性曲線圖·’ 圖7為圖2的變焦投影鏡頭採用攝遠倍率時的球差特性曲 線圖； 圖8為圖2的變焦投影鏡頭採用攝遠倍率時的場曲特性曲 表單編號A0101 第17頁/共31頁 [0048] [0049] [0050] [0051] [0052] [0053] [0054] 099138029 [0055] 201219885 線圖； [0056] 圖9為圖2的變焦投影鏡頭採用攝遠倍率時的畸變特性曲 線圖； [0057] 圖1 0為圖2的變焦投影鏡頭採用攝遠倍率時的橫向色差特 性曲線圖。 【主要元件符號說明】 [0058] 變焦投影鏡頭100 [0059] 第一透鏡組10 [0060] 第一透鏡 11 [0061] 第二透鏡 12 [0062] 第二透鏡組2 0 [0063] 第三透鏡 21 [0064] 第四透鏡 22 [0065] 第五透鏡 23 [0066] 第三透鏡組30 [0067] 第四透鏡組40 [0068] 第七透鏡 41 [0069] 第八透鏡 42 [0070] 第九透鏡 43 [0071] 第十透鏡 44 表單編號A0101 099138029 第18頁/共31頁 0992066252-0 201219885 ❹ [0072] 第五透鏡組5 0 [0073] 光闌91 [0074] 棱鏡92 [0075] 第一平板玻璃 93 [0076] 第二平板玻璃 94 [0077] 第三平板玻璃 95 [0078] 第四平板玻璃 96 [0079] 第五平板玻璃 97 [0080] 保護玻璃9 8 [0081] 成像面99 Ο 099138029 表單編號Α0101 第19頁/共31頁 0992066252-0G 099138029 κ=0.2002793; Α4=-5.951076x10' A6=-l.035487x10' Α8 = -2. 1 05335x1 0' Α10=-6.272113x10 A12=l.737729x10 Α14=-3.338993x10 Α16=-5.721236x10 11 - 14 15 —18 -21 First lens group 10 image side surface Κ=-0.4183628; Α4=-3.529410χ10-6; A6=-l.076255χ10-8; Form numberΑ0101 Page 15/31 pages 0992066252-0 201219885 A8=-l.544430xl0"10; A10 = -6. 120549xl0-13; A12=-l.052326x10-15; Α14 = 1· 235331x1 0 —16; Α1 6 = -5. 397007χ10-19 Zoom of this embodiment The spherical aberration characteristic curve, the field curvature characteristic curve, the distortion characteristic curve and the lateral chromatic aberration characteristic curve of the projection lens 100 are respectively shown in FIG. 3 to FIG. 10 (FIG. 3-6 corresponding to the wide-angle magnification zoom projection lens 1〇〇, FIG. 7- 10 corresponding zoom zoom projection lens 〇〇 〇〇). In Figures 3 and 7, the curves F 'd and C are respectively ^ (wavelength of 486.1 nm, the same below), d light and C light (wavelength is 656.3 nm, bottom _) 绎 zoom operation _ Head 1 〇 () spherical aberration characteristic curve (the same below). It can be seen that the spherical projection lens of the embodiment has a spherical aberration of visible light (40 0-70 Onm) controlled between -0.1 mm and 0 mm. In Figs. 4 and 8, the curves T and S are the Tangential field curvature characteristic curve and the Sagittal field curvature characteristic curve (the same applies hereinafter). It can be seen that the meridional field curvature value and the sagittal field curvature value are controlled between -0 2 mm and 〇 2 mm. In Figs. 5 and 9, the curve is a distortion characteristic curve (the same applies hereinafter). 5%之间。 5%之间。 5%. In Figures 6 and 10, the two curves are the transverse chromatic aberration characteristic curves of the F-light and the C-light through the zoom projection lens (the same below), and the lateral chromatic aberration characteristic curve of the d-light through the zoom projection lens 1〇〇 The vertical axes coincide (the same below). It can be seen that the lateral chromatic aberration generated by the zoom projection lens 1 实施 of the embodiment is controlled between -1 〇 micrometers (Micron, um) to l〇um. In the premise of ensuring sufficient back focus and reduced end telecentric imaging, the zoom projection lens 100 is within the zoom range, and the spherical aberration, curvature of field, distortion and lateral chromatic aberration generated are controlled (corrected) at a small 099138029. Form number A0101, page 16, / 31 pages 0992066252-0 201219885 〇〇 range. [0046] The power of the zoom projection lens is reasonably allocated in the above conditional expression to ensure that the zoom projection lens maintains a high resolution requirement during zooming. In addition, other changes in the spirit of the invention may be made by those skilled in the art, and variations that are made in accordance with the spirit of the invention are intended to be included within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing the system configuration of a zoom projection lens according to the present invention when a wide-angle magnification is used; FIG. 2 is a schematic view showing a system configuration of a zoom projection lens according to the present invention; The zoom projection lens adopts a spherical aberration characteristic curve at a wide angle magnification; FIG. 4 is a field curvature characteristic diagram when the zoom projection lens of FIG. 1 adopts a wide angle magnification; FIG. 5 is a field curvature characteristic diagram of the zoom projection lens of FIG. 1; The zoom projection lens adopts a distortion profile at a wide angle magnification; FIG. 6 is a lateral chromatic aberration characteristic diagram when the zoom projection lens of FIG. 1 adopts a wide angle magnification. FIG. 7 is a zoom projection of FIG. The spherical aberration characteristic curve when the lens adopts the telephoto magnification; FIG. 8 is the field curvature characteristic of the zoom projection lens of FIG. 2 when the telephoto magnification is used. Form No. A0101 Page 17 of 31 [0048] [0049] [0050] [0055] FIG. 9 is a graph showing distortion characteristics when the zoom projection lens of FIG. 2 adopts a telephoto magnification; [0057] FIG. The projection lens of FIG. 2 using lateral chromatic aberration characteristic graph telephoto magnification. [Main Component Symbol Description] [0058] Zoom Projection Lens [0059] First Lens Group 10 [0060] Second Lens 11 [0061] Second Lens 12 [0062] Second Lens Group 2 [0063] Third Lens 21th lens 22 [0065] Fifth lens 23 [0066] Third lens group 30 [0067] Seventh lens group [0068] Eighth lens 41 [0069] Eighth lens 42 [0070] Lens 43 [0071] Tenth lens 44 Form No. A0101 099138029 Page 18 of 31 0992066252-0 201219885 ❹ [0072] Fifth lens group 5 0 [0073] Aperture 91 [0074] Prism 92 [0075] Flat Glass 93 [0076] Second Flat Glass 94 [0077] Third Flat Glass 95 [0078] Fifth Flat Glass 96 [0079] Fifth Flat Glass 97 [0080] Protective Glass 9 8 [0081] Imaging Surface 99 Ο 099138029 Form No. 1010101 Page 19/Total 31 Page 0992066252-0