201219823 六、發明說明： ' 【發明所屬之技術領域】 [0001] 本發明涉及一種變焦鏡頭。 [0002] [先前技術3 隨著數位相機或數位攝像機的逐漸普及，人們對攝像的 品質提出了更高的要求，比如使用者不僅希望數位相機 具有較高的變焦倍率，而且希望數位相機的體積更加的 輕薄短小。但是現在的高變焦倍率的鏡頭内部需要給各 鏡群預留一定的空間，以利於各鏡群移動進行變焦，因 〇 此厚度一般比較大。 [0003] 【發明内容】 有鑒於此，有必要提供一種厚度薄且變焦倍率高的變焦 鏡頭。 [0004] 〇 一種變焦鏡頭，沿其光軸方向從物端到像端依次包括一 個具有正光焦度的第一透鏡組、一個具有負光焦度的第 二透鏡組、一個具有正光焦度的第三透鏡組、一個具有 正光焦度的第四透鏡組，所述第一透鏡組、第二透鏡組 、第三透鏡組及第四透鏡組在變焦過程中都能夠沿光軸 方向移動，以實現變焦，所述變焦鏡頭滿足以下條件式 [0005] -0.15< L3/Lt < -0.35 [0006] 其中，L3為所述變焦鏡頭從廣角端到望遠端的變焦過程 中，所述第三透鏡組在光軸上的移動向量，且所述第三透 鏡組從物端到像端的移動向量為正值，從像端到物端的 099137436 表單編號A0101 第5頁/共27頁 0992065271-0 201219823 移動向量為貞LU A所述變焦鏡頭在望遠端時在光輪 方向的總長度。 [0007] [0008] [0009] [0010] 相較於先前技術’本發明的變焦鏡頭，不僅可具有較高 的變焦倍率，而且在光轴方向的厚度被大大減小。 【實施方式】 下面將結合附圖，對本發明作進一步的詳細說明。 請參閱圖1，為本發明實施方式所提供的變焦鏡頭1〇〇的 結構示意圖。所述變焦鏡頭100包括沿其光轴方向從物端 到像端依序排列的一個具有正光焦度的第一透鏡組i 0、 一個具有負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、一個具有正光焦度的第四透鏡組40及 一影像感測器50。所述影像感測器5〇包括一個成像面5】 。取像時’光線經過第一透鏡組1〇、第二透鏡組2〇、第 三透鏡組30、第四透鏡組4〇，而成像於影像感測器50的 成像面51上，而獲得清晰成像，其申影像感測器50為CCD (Charge Coupled Device,電荷麵合器件）或 CMOS (Complementary Metal Oxide Semiconductor，互 補式金屬氧化物半導體）。 所述第一透鏡组10、第二透鏡組20、第三透鏡組30及第 四透鏡組40都能沿所述變焦鏡頭1〇〇的光軸方向移動，以 實現變焦。 所述第一透鏡組10包括從物端到像端依次排列的一個具 有負光焦度的第一透鏡11及一個具有正光焦度的第二透 鏡12 ’所述第一透鏡11包括第一物端表面S1及第一像端 099137436 表單煸號A0101 第6頁/共27頁 0992065271-0 [0011] 201219823 一2。所述 [0012] 端表面S4。 所述第二透鏡組20包括從物端到像端依次排列的/僩透 有負光焦度的第三透鏡21、一個具有負光焦度的第四鎳 緣22及一個具有正光焦度的第五透鏡23，所述第〆透 包括第三物端表面S5及第三像端表面S6。所述 鐃22包括第四物端表面S7及第四像端表面讣。所述第玉 透鍊23包括第五物端表面S9及第五像端表面Sl〇 ° [0013] 所述第三透鏡組3 〇包括從物端到像端依次排列的〆個具 有炎光焦度的第六透故及一個具有負光焦度的第七透 鐃32。所述第六透鏡31包括第六物端表面S11及第六像端 表面S12。所述第七透鏡32包括第七物端表面S1 3及第七 像端表®S14。 [0014] 戶斤述第四透鏡組4〇包括從物端到像端依次排列的一個具 有；光焦度的第八透鍊41。所述第八透鏡41包括一個第 八物端表面S15及第八像端表面$16。 ❹ [0015] 所述變焦鏡頭100還包括位於所述影像感測器的物侧且從 物端到像端依次排列的-個濾光片⑼及—個保護玻㈣ 。所述滤光片6G用騎止紅外料雜散錢人所述影像 感測器5G，以紐所述影像感測㈣的成像品質。所述 保護玻璃7G用於保護所述影像感測器5()。所述濾光片/ 包括-個第九物端表面S17及第九像端表面训 護玻璃70包括-個第十物端表面川及第十像蠕表面如 〇 表單編號A0101 第7頁/共27頁 099137436 °992065271h 201219823 [0016] 所述變焦鏡頭100還包括一個設置於第二透鏡組20與第三 透鏡組30之間的光闌（Aperture stop)80，以保證戶斤述^ 變焦鏡頭100的整體結構相對於光闌80對稱，有效地降低 慧差的影響；同時限制經過第二透鏡組20的光線進入第 三透鏡組30的光通量，並讓經過第三透鏡組30後的光錐 更加對稱，使所述變焦鏡頭1 〇0的彗差（coma)得以修正 〇 [0017] 所述變焦鏡頭1 〇 0滿足以下條件式： [0018] (1) -0. 15< L3/Lt < -0. 35 [0019] 其中，L3為所述變焦鏡頭100從廣角端望遠端的變焦過 程中，所述第三透鏡組30在光軸对移動向量，且所述第 三透鏡組30從物端到像端的移動為量為正值，從像端到 物端的移動向量為負值；Lt為所述變焦鏡頭1〇〇在望遠 端時沿光軸方向的總長度。在所述變焦鏡頭100沿其光轴 方向的總長度相同的條件下，所述變焦鏡頭1 0 0從廣角端 至望遠端的變焦過程中，所述第三透鏡組30的移動量過 大’會導致所述第二透鏡組20的先焦度過大，使得光束 通過所述第二透鏡組20時產生太大的光束轉折，會造成 所述變焦鏡頭100產生太大的慧差而難以修正。若所述第 三透鏡組30移動量過小，則會導致所述變焦鏡頭100處於 望遠端時所述第一透鏡組10與所述第二透鏡組20的間距 加大，會導致所述第二透鏡組20與所述第三透鏡組30距 離太近而產生機械干涉。在本實施方式中， L3=~l〇.43mm ， Lt=49mm ， L3/Lt=-0.213 。 099137436 &單鵷號A0101 第8頁/共27頁 0992065271-0 201219823 ， • [0020] 優選地，為了光學性能更好，所述變焦鏡頭1 00需滿足以 ' 下條件式： [0021] (2) 0.165 < f3/ft <0.3 [0022] 其中，ί3為所述第三透鏡組30的有效焦距；ft為所述變 焦鏡頭100在望遠端的有效焦距。在所述變焦鏡頭100在 光軸方向的總長度相同的條件下，若所述第三透鏡組30 的光焦度過大，則需增加所述第二透鏡組20的光焦度， 以維持所述變焦鏡頭100的有效焦距與變焦倍率，而所述 q 第二透鏡組20的光焦度增加，會造成所述變焦鏡頭100產 生太大的慧差而難以補正。若所述第三透鏡組30的光焦 度過小，則需增加所述第四透鏡組40的光焦度，以維持 所述變焦鏡頭100的有效焦距與變焦倍率，而所述第四透 鏡組40的光焦度增大，會造成所述變焦鏡頭100產生較大 的像差，且使得所述變焦鏡頭100處於廣角端時，所述第 三透鏡組30與所述第四透鏡组40間距過於择近，容易產 生機構干涉。在本實施方式中，f3 = 7. 99mm， 〇 ft=36·33mm ， f3/ft=0.22 。 [0023] 優選地，為了使厚度更薄，所述變焦鏡頭100還需滿足以 下條件式： [0024] (3) 1.3 < (THT2 + T3 + T4) / DIM < 1.9 [0025] 其中，T1為所述第一透鏡組10在光軸方向上的總厚度； T2為所述第二透鏡組20在光軸方向上的總厚度；T3為所 述第三透鏡組30在光軸方向上的總厚度；T4為所述第四 透鏡組40在光軸方向上的總厚度；DIM為所述變焦鏡頭 099137436 表單編號 A0101 第 9 頁/共 27 頁 0992065271-0 201219823 100的最大成像圓的直徑。在本實施方式中，201219823 VI. Description of the invention: 'Technical field to which the invention pertains. [0001] The present invention relates to a zoom lens. [0002] [Prior Art 3 With the gradual popularization of digital cameras or digital cameras, people have put forward higher requirements on the quality of imaging. For example, users not only want digital cameras to have high zoom magnification, but also want the size of digital cameras. More light and thin. However, the current high zoom magnification lens needs to reserve a certain space for each mirror group to facilitate the zooming of each mirror group, because the thickness is generally large. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a zoom lens having a small thickness and a high zoom magnification. [0004] A zoom lens includes, in order from its object end to the image end, a first lens group having a positive power, a second lens group having a negative power, and a positive power in a direction along an optical axis thereof. a third lens group, a fourth lens group having positive power, the first lens group, the second lens group, the third lens group, and the fourth lens group are movable in the optical axis direction during zooming, In order to achieve zooming, the zoom lens satisfies the following conditional expression [0005] -0.15 < L3/Lt < -0.35 [0006] wherein L3 is a zooming process of the zoom lens from the wide-angle end to the telephoto end, the The movement vector of the three lens group on the optical axis, and the movement vector of the third lens group from the object end to the image end is a positive value, from the image end to the object end 099137436 Form No. A0101 Page 5 / Total 27 Page 0992065271-0 201219823 The motion vector is 总LU A The total length of the zoom lens in the direction of the light wheel at the telephoto end. [0009] [0010] Compared to the prior art zoom lens of the present invention, not only can a high zoom magnification be obtained, but also the thickness in the optical axis direction is greatly reduced. [Embodiment] Hereinafter, the present invention will be further described in detail with reference to the accompanying drawings. Please refer to FIG. 1 , which is a schematic structural diagram of a zoom lens 1 according to an embodiment of the present invention. The zoom lens 100 includes a first lens group i 0 having positive refractive power, a second lens group 20 having negative refractive power, and a positive light, which are sequentially arranged from the object end to the image end in the optical axis direction thereof. A third lens group 30 of power, a fourth lens group 40 having positive power, and an image sensor 50. The image sensor 5A includes an imaging surface 5]. When the image is taken, the light passes through the first lens group 1〇, the second lens group 2〇, the third lens group 30, and the fourth lens group 4〇, and is imaged on the imaging surface 51 of the image sensor 50 to obtain clearness. For imaging, the image sensor 50 is a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor). The first lens group 10, the second lens group 20, the third lens group 30, and the fourth lens group 40 are all movable in the optical axis direction of the zoom lens 1 to achieve zooming. The first lens group 10 includes a first lens 11 having a negative refractive power and a second lens 12 having a positive refractive power, which are sequentially arranged from the object end to the image end. The first lens 11 includes the first object. End surface S1 and first image end 099137436 Form nickname A0101 Page 6 / Total 27 page 0992065271-0 [0011] 201219823 A 2. [0012] End surface S4. The second lens group 20 includes a third lens 21 that is sequentially arranged from the object end to the image end, has a negative refractive power, a fourth nickel edge 22 having a negative refractive power, and a positive refractive power. The fifth lens 23 includes a third object end surface S5 and a third image end surface S6. The crucible 22 includes a fourth object end surface S7 and a fourth image end surface surface. The first yoke chain 23 includes a fifth object end surface S9 and a fifth image end surface S1 〇 [0013] The third lens group 3 〇 includes a plurality of luminescent beams arranged in order from the object end to the image end The sixth pass of degree and a seventh pass 32 with negative power. The sixth lens 31 includes a sixth object end surface S11 and a sixth image end surface S12. The seventh lens 32 includes a seventh object end surface S1 3 and a seventh image end table ® S14. [0014] The fourth lens group 4A includes an eighth through chain 41 having a power of 100 degrees arranged from the object end to the image end. The eighth lens 41 includes an eighth object end surface S15 and an eighth image end surface $16. [0015] The zoom lens 100 further includes a filter (9) and a protective glass (4) located on the object side of the image sensor and arranged in order from the object end to the image end. The filter 6G senses the imaging quality of the image sensor (4) by using the image sensor 5G of the infrared ray finder. The protective glass 7G is used to protect the image sensor 5 (). The filter/including a ninth object end surface S17 and a ninth image end surface training glass 70 includes a tenth object end surface and a tenth image surface, such as the 〇 form number A0101, page 7 / total 27 0099137436 °992065271h 201219823 [0016] The zoom lens 100 further includes an aperture stop 80 disposed between the second lens group 20 and the third lens group 30 to ensure that the zoom lens 100 is The overall structure is symmetrical with respect to the aperture 80, effectively reducing the influence of coma; while limiting the amount of light passing through the second lens group 20 into the third lens group 30, and allowing the light cone after passing through the third lens group 30 to be more Symmetrical, the coma of the zoom lens 1 〇0 is corrected. [0017] The zoom lens 1 〇0 satisfies the following conditional expression: [0018] (1) -0. 15 < L3/Lt < - L. 35 [0019] wherein L3 is a zooming process of the zoom lens 100 from the wide-angle end, the third lens group 30 moves the vector in the optical axis pair, and the third lens group 30 is from the object end. The movement to the image end is a positive value, and the movement vector from the image end to the object end is a negative value; Lt is the total length of the zoom lens 1 in the optical axis direction at the telephoto end. Under the condition that the total length of the zoom lens 100 along its optical axis direction is the same, during the zooming of the zoom lens 100 from the wide-angle end to the telephoto end, the amount of movement of the third lens group 30 is too large, which may result in The first focal length of the second lens group 20 is too large, so that a large beam transition occurs when the light beam passes through the second lens group 20, which causes the zoom lens 100 to generate a large coma and is difficult to correct. If the amount of movement of the third lens group 30 is too small, the distance between the first lens group 10 and the second lens group 20 is increased when the zoom lens 100 is at the telephoto end, which may cause the second The lens group 20 is too close to the third lens group 30 to cause mechanical interference. In the present embodiment, L3=~l〇.43mm, Lt=49mm, L3/Lt=-0.213. 099137436 &single number A0101 Page 8 of 27 page 0992065271-0 201219823, • [0020] Preferably, for better optical performance, the zoom lens 100 needs to satisfy the following condition: [0021] 2) 0.165 < f3/ft <0.3 [0022] wherein ί3 is the effective focal length of the third lens group 30; ft is the effective focal length of the zoom lens 100 at the telephoto end. Under the condition that the total length of the zoom lens 100 in the optical axis direction is the same, if the power of the third lens group 30 is too large, the power of the second lens group 20 needs to be increased to maintain the The effective focal length and the zoom magnification of the zoom lens 100 increase, and the power of the q second lens group 20 increases, which causes the zoom lens 100 to generate a large coma and is difficult to correct. If the power of the third lens group 30 is too small, the power of the fourth lens group 40 needs to be increased to maintain the effective focal length and zoom magnification of the zoom lens 100, and the fourth lens group The optical power of 40 is increased, causing the zoom lens 100 to generate a large aberration, and the third lens group 30 is spaced apart from the fourth lens group 40 when the zoom lens 100 is at the wide angle end. Being too close, it is easy to cause institutional interference. In the present embodiment, f3 = 7.99 mm, 〇 ft = 36 · 33 mm, and f3 / ft = 0.22. [0023] Preferably, in order to make the thickness thinner, the zoom lens 100 further satisfies the following conditional expression: [0024] (3) 1.3 < (THT2 + T3 + T4) / DIM < 1.9 [0025] wherein T1 is the total thickness of the first lens group 10 in the optical axis direction; T2 is the total thickness of the second lens group 20 in the optical axis direction; and T3 is the third lens group 30 in the optical axis direction. Total thickness; T4 is the total thickness of the fourth lens group 40 in the optical axis direction; DIM is the diameter of the largest imaging circle of the zoom lens 099137436 Form No. A0101 Page 9 of 27 0992065271-0 201219823 100 . In the present embodiment,
Tl=3.97mm, T2M.495mm, T3 = 2.184mm, T4 = 1.81mm ，DIM =7.79ππη，（Τ1+Τ2 + Τ3 + Τ4) / dIM= m _6] α透鏡表面中心為原點，光轴為㈣，透鏡表面的非球面 面型運算式為： [0027] 其中，c為鏡面表面中心的曲率，為從光軸到透鏡表面 的南度，k疋二次曲面係數，為第j階的非球面面型係數 。通過將表1至表4 (請參閱下文）的資料代入上述運算 式’可獲知透鏡表面的非球面形狀。 [0028] 所述變焦鏡頭100的各光學元件滿足表i、表2及表3的條 件。下列表（一）中分別列有由物端到像端依序編號的 光學面號碼（Surface #)、R為各透鏡的光學表面的曲 率半徑、D為為對應表面到後一個表面的軸上距離（兩個 表面截得光軸的長度）、Nd為對應透鏡組對d光（波長為 587納米）的折射率，Vd為d光在對應透鏡組的阿貝數 (abbe number)，f為所述i焦鏡頭1〇〇的有效焦距；f number為所述變焦鏡頭1〇〇钓光氣數；2ω為所述變焦鏡 頭100的視場角。 [0029] 表 1 [0030] 表面 透鏡表 R (mm) D (mm) Nd Vd 面 S1 球面 17. 509 0.5 2 25. 5 S2 球面 12.333 3.47 1. 73 ’ —*----— 54. 7 S3 球面 97.544 D3 -- — 表單編號Α0101 第10頁/共27頁 0992065271-0 - 099137436 201219823Tl=3.97mm, T2M.495mm, T3 = 2.184mm, T4 = 1.81mm, DIM = 7.79ππη, (Τ1+Τ2 + Τ3 + Τ4) / dIM= m _6] The center of the α lens surface is the origin and the optical axis is (4) The aspherical surface equation of the lens surface is: [0027] where c is the curvature of the center of the mirror surface, from the optical axis to the south of the lens surface, k疋 quadric coefficient, which is the jth order Spherical surface factor. The aspherical shape of the lens surface can be known by substituting the data of Tables 1 to 4 (see below) into the above equation. [0028] The optical elements of the zoom lens 100 satisfy the conditions of Tables i, 2, and 3. In the following list (1), the optical surface numbers (Surface #) sequentially numbered from the object end to the image end are listed, R is the radius of curvature of the optical surface of each lens, and D is the axis corresponding to the surface of the latter surface. The distance (the length of the two surfaces intercepted by the optical axis), Nd is the refractive index of the corresponding lens group pair d light (wavelength is 587 nm), and Vd is the abbe number of the d light in the corresponding lens group, f is The effective focal length of the i-focus lens 1〇〇; f number is the number of phosgenes of the zoom lens 1; 2ω is the angle of view of the zoom lens 100. Table 1 [0030] Surface lens table R (mm) D (mm) Nd Vd surface S1 spherical surface 17. 509 0.5 2 25. 5 S2 spherical surface 12.333 3.47 1. 73 ' —*----- 54. 7 S3 Spherical 97.544 D3 -- Form No. 101 0101 Page 10 / Total 27 Page 0992065271-0 - 099137436 201219823
G S4 非球面 77. 394 0. 53 1.81 40. 7 S5 非球面 7. 247 1. 865 — — S6 球面 210. 04 4 0. 35 1. 75 52.3 S7 球面 6.902 0· 3 -一 —— S8 非球面 5. 417 1. 45 2 19.3 S9 非球面 8. 555 D9 _一 -一 S10 光闌 無窮大 0. 25 -一 — S11 非球面 3. 578 1. 36 1. 62 58. 2 S12 非球面 -8.933 0. 1 — S13 球面 7. 198 0. 724 1. 75 25 S14 球面 2. 691 D14 、—— —— S15 非球面 110.68 5 1.81 1.5 81.6 S16 非球面 10.818 D16 — — S17 平面 無窮大 0.3 1. 52 64. 2 S18 平面 無窮大 0.1 — 一- S19 平面 無窮大 0. 5 1. 52 64. 2 S20 平面 無窮大 1 一― — 成像面 平面 無窮大 - —— — 表2 [0031] 表面 表面非球面面型參數 S4 K=0; A4=7.285928e-04; 表單編號A0101 第11頁/共27頁 0992065271-0 099137436 201219823 099137436 A6=-l.02141e-05; ‘ A8--2.21533e-07; A10=3.234887e-10; A12=l.403337e-10; A14=4.380274e-12; A16=-l.14372e-13 S5 K=0; A4=8.333347e-04; A6=3.836097e-05; A8=-2.356593e-06; A10=4.713518e-08； A12=3.023523e-09; A14=-1.106193e-10; A16=-3.618037e-12 S8 K=0; A4=-8.53161e-04; A6=-l.938697e-05; A8=-3.409221E-06; A10=l.793909E-07; A12=l.201957E-08; A14-4.504156E-10; A16=-7.4584e-ll S9 K=0; A4=-6.756763e-04; A6=-l.042164e-05; A8=-2.072401e-06; A10=2.040714e-07; A12=l.277144e-08; A14=9.482202e-10; 表單編號A0101 第12頁/共27頁 0992065271-0 201219823 A16=-l.20145e-10 S11 K=-0.569381; A4=-3.709367e-03; Α6=5.953039e-04; Α8=-5.851837e-04; A10=l.157918e-04; A12=-l.466671e-05; A14=l.021669e-06; Α16=-3.479846e-07 S12 Κ-0; A4=-l.079932e-03; Α6=2.975613e-04; Α8=-6.252417e-04; A10=l.479121e-04; A12=l.062412e-05; A14=-l.57746e-05; Α16=2.320427e-06 S15 Κ=0; Α4=-7.499888e-04; A6=-l.244596e-05; Α8=4.095156e-06; Α10=-5.15029e-07; A12=l.032745e-08; Α14=6.692326e-10; Α16=-3.855609e-ll S16 Κ=0; Α4=-7.375438e-04; Α6=-6.933953e-05; A8=l.055911e-05; 表單編號A0101 第13頁/共27頁 0992065271-0 099137436 201219823 A10=-7.442485e-07; A12=8.975996e-09; A14=8.183427e-10; A16=-3.043076e-ll [0032] f D3 D9 D14 D16 廣角端 4. 82 0. 4 10. 1 3. 01 3. 82 中間點 18. 7 8. 73 2. 89 12.2 4. 51 望遠端 36. 33 16. 16 '-…丨1 ------J 0. 97 13. 59 3. 67 表4 ---. 一 f F number 2w (度） 廣角端 4. 82 3. 36 78 中間點 18.7 5. 78 24. 6 望遠端 36. 33 6. 07 12. 5 本實施方式的變焦鏡頭100處於廣角端時，其像差場曲 及畸變分別如圖2到圖4所示。圖2中，分別為針對!；>線（波 長為486⑽），d線（波長為587 nB)，c線（波長為656 nm)而觀察到的像差值曲線。總體而言，本實施方式的變 焦鏡頭100對可見光（波長範圍在400 nm_7〇〇 nm之間） 產生的像差值控制在（-0.2mm，0.2mm)範圍内。圖3中， 曲線T及S分別為子午場曲（tangential fieid curvature)特性曲線及弧矢場曲（sagittal field curvature )特性曲線。可見，子午場曲值和孤矢場曲 值被控制在（-〇. 2ιηιη，〇. 2mm)範圍内。圖4中，曲線dis 為畸變特性曲線。由圖可知，畸變量被控制在 099137436 表單編號A0101 第14頁/共27頁 0992065271-0 201219823 [0034] Ο ο [0035] [0036] (-20%，20%)範圍内。由此可見，所述變焦鏡頭ι〇〇處於 廣角端時的球面像差、場曲 '畸變都能被控制（修正）在 較小的範圍内。可以理解，雖然在本實施方式中，所述 變焦鏡頭100處於廣角端時，畸變量在（—2〇%，20%)範圍 内，但可以利用影像處理技術進行修正。 本實施方式的變焦鏡頭1〇〇處於望遠端時，其像差、場曲 及畸變分別如圖5到圖7所示。圖5中，分別為針對F線（波 長為486nm) ’ d線（波長為587 nm)，C線（波長為656 nm)而觀察到的像差值曲線。總體而言，本實施方式的變 焦鏡頭1 0 0對可見光（波長範圍在4〇 〇 n m - 7 0 0 n m之間） 產生的像差值控制在（-〇.2mm，0.2mm)範圍内。圖6中， 曲線T及S分別為子午場曲（t.ange...nt:ia 1. f ie 1 d curvature)特性曲線及弧矢場曲（sagittai neld curvature )特性曲線。可見，子午場曲值和弧矢場曲 值被控制在（-0. 5mm，0.5mm)範圍内。圖7中，曲線dis 為畸變特性曲線。由圖可约，畸變量被控制在（_5%，5%) 範圍内。由此可見，所述變焦鏡頭1〇〇處於望遠端時的球 面像差、場曲、畸變都能被控制（修正）在較小的範圍内 〇 相較於先前技術，本發明的變焦鏡頭，不僅可具有較高 的變焦倍率，而且在光軸方向的厚度被大大減小。 另外，本領域技術人員可在本發明精神内做其他變化， 然，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。 099137436 【圖式簡單說明】 表單編號A0101 第15頁/共27頁 0992065271-0 201219823 [0037] 圖1為本發明的變焦鏡頭的結構示意圖。 [0038] 圖2為圖1的變焦鏡頭處於廣角端時的球面像差圖。 [0039] 圖3為圖1的變焦鏡頭處於廣角端時的場曲圖。 [0040] 圖4為圖1的變焦鏡頭處於廣角端時的畸變圖。 [0041] 圖5為圖1的變焦鏡頭處於望遠端時的球面像差圖。 [0042] 圖6為圖1的變焦鏡頭處於望遠端時的場曲圖。 [0043] 圖7為圖1的變焦鏡頭處於望遠端時的畸變圖。 【主要元件符號說明】 [0044] 變焦鏡頭 100 [0045] 第一透鏡組 10 [0046] 第一透鏡 11 [0047] 第一物側表面 S1 [0048] 第一像側表面 S2 [0049] 第二透鏡 12 [0050] 第二物側表面 S3 [0051] 第二像側表面 S4 [0052] 第二透鏡組 20 [0053] 第三透鏡 21 [0054] 第三物側表面 S5 [0055] 第三像側表面 S6 表單編號A0101 第16頁/共27頁 099137436 0992065271-0' 201219823 [0056] 第四透鏡 22 [0057] 第四物側表面 S7 [0058] 第四像側表面 S8 [0059] 第五透鏡 23 [0060] 第五物側表面 S9 [0061] 第五像側表面 S10 ❹ [0062] 第三透鏡組 30 [0063] 第六透鏡 31 [0064] 第六物側表面 S11 - [0065] 第六像側表面 S12 [0066] 第七透鏡 32 [0067] 第七物側表面 S13 [0068] 第七像側表面 SI4 〇 [0069] 第四透鏡組 40 [0070] 第八透鏡 41 [0071] 第八物側表面 S15 [0072] 第八像侧表面 S16 [0073] 影像感測器 50 [0074] 成像面 51 099137436 表單編號A0101 第17頁/共27頁 0992065271-0 201219823 [0075] 濾光片 60 [0076] 第九物側表面 S17 [0077] 第九像側表面 S18 [0078] 保護玻璃 70 [0079] 第十物側表面 S19 [0080] 第十像側表面 S20 [0081] 光闌 80 099137436 表單編號 A0101 第 18 頁/共 27 頁 0992065271-0G S4 aspherical surface 77. 394 0. 53 1.81 40. 7 S5 aspherical surface 7. 247 1. 865 — — S6 spherical surface 210. 04 4 0. 35 1. 75 52.3 S7 spherical surface 6.902 0· 3 - one - S8 non Spherical 5. 417 1. 45 2 19.3 S9 Aspherical surface 8. 555 D9 _1 -1 S10 aperture infinity 0. 25 -1 - S11 aspherical surface 3. 578 1. 36 1. 62 58. 2 S12 aspherical surface - 8.933 0. 1 — S13 Spherical 7. 198 0. 724 1. 75 25 S14 Spherical 2. 691 D14 ,———— S15 Aspherical 110.68 5 1.81 1.5 81.6 S16 Aspheric 10.818 D16 — — S17 Plane Infinity 0.3 1. 52 64 2 S18 Plane Infinity 0.1 - I - S19 Plane Infinity 0. 5 1. 52 64. 2 S20 Plane Infinity 1 I -- Image plane infinity - —— — Table 2 [0031] Surface surface aspherical surface parameter S4 K =0; A4=7.285928e-04; Form No. A0101 Page 11/Total 27 Page 0992065271-0 099137436 201219823 099137436 A6=-l.02141e-05; 'A8--2.21533e-07; A10=3.234887e-10 A12=l.403337e-10; A14=4.380274e-12; A16=-l.14372e-13 S5 K=0; A4=8.333347e-04; A6=3.836097e-05; A8=-2.356593e-06 ; A10=4.713518 E-08; A12=3.023523e-09; A14=-1.106193e-10; A16=-3.618037e-12 S8 K=0; A4=-8.53161e-04; A6=-l.938697e-05; A8= -3.409221E-06; A10=l.793909E-07; A12=l.201957E-08; A14-4.504156E-10; A16=-7.4584e-ll S9 K=0; A4=-6.756763e-04; A6 =-l.042164e-05; A8=-2.072401e-06; A10=2.040714e-07; A12=l.277144e-08; A14=9.482202e-10; Form No. A0101 Page 12 of 27 0992065271- 0 201219823 A16=-l.20145e-10 S11 K=-0.569381; A4=-3.709367e-03; Α6=5.953039e-04; Α8=-5.851837e-04; A10=l.157918e-04; A12=- L.466671e-05; A14=l.021669e-06; Α16=-3.479846e-07 S12 Κ-0; A4=-l.079932e-03; Α6=2.975613e-04; Α8=-6.252417e-04; A10=l.479121e-04; A12=l.062412e-05; A14=-l.57746e-05; Α16=2.320427e-06 S15 Κ=0; Α4=-7.499888e-04; A6=-l.244596e -05; Α8=4.095156e-06; Α10=-5.15029e-07; A12=l.032745e-08; Α14=6.692326e-10; Α16=-3.855609e-ll S16 Κ=0; Α4=-7.375438e -04; Α6=-6.933953e-05; A8=l.055911e-05; Form No. A0101 Page 13/Total 27 Page 0992065271-0 099137436 201219823 A10=-7.442485e-07; A12=8.975996e-09; A14 =8.18342 7e-10; A16=-3.043076e-ll [0032] f D3 D9 D14 D16 Wide-angle end 4. 82 0. 4 10. 1 3. 01 3. 82 Intermediate point 18. 7 8. 73 2. 89 12.2 4. 51 telephoto end 36. 33 16. 16 '-...丨1 ------J 0. 97 13. 59 3. 67 Table 4 ---. One f F number 2w (degrees) Wide-angle end 4. 82 3 36 78 Intermediate point 18.7 5. 78 24. 6 Telephoto end 36. 33 6. 07 12. 5 When the zoom lens 100 of the present embodiment is at the wide-angle end, the aberration field curvature and distortion are as shown in Fig. 2 to Fig. 4, respectively. Show. In Fig. 2, the aberration curves observed for the !;> line (wave length 486 (10)), d line (wavelength 587 nB), and c line (wavelength 656 nm) are observed. In general, the aberration aberration lens 100 of the present embodiment controls the aberration value of visible light (wavelength range between 400 nm_7 〇〇 nm) in the range of (-0.2 mm, 0.2 mm). In Fig. 3, the curves T and S are the tangential fieid curvature characteristic curve and the sagittal field curvature characteristic curve, respectively. It can be seen that the meridional curvature values and the orphan field curvature values are controlled within the range of (-〇. 2ιηιη, 〇. 2mm). In Fig. 4, the curve dis is a distortion characteristic curve. As can be seen from the figure, the distortion is controlled at 099137436 Form No. A0101 Page 14 of 27 0992065271-0 201219823 [0034] 00 ο [0036] [0036] (-20%, 20%). It can be seen that the spherical aberration and the field curvature 'distortion of the zoom lens ι at the wide-angle end can be controlled (corrected) in a small range. It can be understood that although in the present embodiment, when the zoom lens 100 is at the wide-angle end, the distortion is in the range of (−2〇%, 20%), but it can be corrected by image processing technology. When the zoom lens 1 of the present embodiment is at the telephoto end, its aberration, curvature of field, and distortion are as shown in Figs. 5 to 7, respectively. In Fig. 5, the aberration curves observed for the F line (wave length 486 nm) ‘d line (wavelength 587 nm) and C line (wavelength 656 nm) are shown. In general, the aberration value of the zoom lens of the present embodiment for visible light (wavelength range between 4 〇 〇 n m - 7 0 0 n m) is controlled within the range of (-〇.2 mm, 0.2 mm). In Fig. 6, the curves T and S are the characteristic curves of the meridian field curvature (t.ange...nt:ia 1. f ie 1 d curvature) and the sagittai neld curvature characteristic curve, respectively. It can be seen that the meridional field curvature value and the sagittal field curvature value are controlled within the range of (-0. 5 mm, 0.5 mm). In Fig. 7, the curve dis is a distortion characteristic curve. From the graph, the distortion variable is controlled within the range of (_5%, 5%). It can be seen that the spherical aberration, curvature of field, and distortion of the zoom lens 1 at the telephoto end can be controlled (corrected) in a smaller range, compared to the prior art, the zoom lens of the present invention, Not only can it have a higher zoom magnification, but the thickness in the optical axis direction is greatly reduced. In addition, those skilled in the art can make other changes within the spirit of the invention, and all changes that are made in accordance with the spirit of the invention are included in the scope of the invention. 099137436 [Simple description of the drawing] Form No. A0101 Page 15 of 27 0992065271-0 201219823 [0037] FIG. 1 is a schematic structural view of a zoom lens according to the present invention. 2 is a spherical aberration diagram of the zoom lens of FIG. 1 at a wide angle end. [0038] FIG. 3 is a field curvature diagram of the zoom lens of FIG. 1 at a wide angle end. [0039] FIG. 4 is a distortion diagram of the zoom lens of FIG. 1 at a wide angle end. [0040] FIG. 5 is a spherical aberration diagram of the zoom lens of FIG. 1 at a telephoto end. [0041] FIG. 6 is a field curvature diagram of the zoom lens of FIG. 1 at a telephoto end. [0042] FIG. [0043] FIG. 7 is a distortion diagram of the zoom lens of FIG. 1 at the telephoto end. [Main Element Symbol Description] [0044] Zoom Lens 100 [0045] First Lens 11 [0046] First Object Side Surface S1 [0048] First Image Side Surface S2 [0049] Second Lens 12 [0050] Second object side surface S3 [0051] Second image side surface S4 [0052] Third lens group [0053] Third object side surface S5 [0055] Third image Side surface S6 Form number A0101 Page 16 / Total 27 page 099137436 0992065271-0' 201219823 [0056] Fourth lens 22 [0057] Fourth object side surface S7 [0058] Fourth image side surface S8 [0059] Fifth lens Fifth object side surface S9 [0061] Fifth image side surface S10 ❹ [0062] Third lens group 30 [0063] Sixth lens 31 [0064] Sixth object side surface S11 - [0065] Image side surface S12 [0066] Seventh object side surface S13 [0067] Seventh image side surface SI4 〇 [0069] Fourth lens group 40 [0070] Eighth lens 41 [0071] Eighth Object side surface S15 [0072] Eight image side surface S16 [0073] Image sensor 50 [0074] Imaging surface 51 099137436 Table Single No. A0101 Page 17 / Total 27 Page 0992065271-0 201219823 [0075] Filter 60 [0076] Ninth Object Side Surface S17 [0077] Ninth Image Side Surface S18 [0078] Protective Glass 70 [0079] Tenth Object side surface S19 [0080] Tenth image side surface S20 [0081] 阑 80 099137436 Form No. A0101 Page 18 of 27 0992065271-0