TW200918935A

TW200918935A - Zoom lens

Info

Publication number: TW200918935A
Application number: TW96138982A
Authority: TW
Inventors: Kuo-Chuan Wang; Jung-Yao Chen
Original assignee: Young Optics Inc
Priority date: 2007-10-18
Filing date: 2007-10-18
Publication date: 2009-05-01
Also published as: TWI352821B

Abstract

A zoom lens including a first lens group with a negative refractive power and a second lens group with a positive refractive power is provided. The first lens is composed of a first lens, a second lens and a third lens arranged in order from an object side to an image side. Refractive powers of the first lens, the second lens and the third lens are respectively negative, negative and positive. The second lens group is disposed between the first lens group and the image side. The second lens group is composed of a fourth lens, a fifth lens, a sixth lens, and a seven lens arranged in order from the object side to the image side. Refractive powers of the fourth lens, the fifth lens, the sixth lens, and the seven lens are respectively positive, positive, negative and positive. The first lens group and the second group are capable of moving between the object side and the image side. At least one of the fourth lens to seven lens includes an aspheric lens.

Description

200918935 九、發明說明：【發明所屬之技術4員本發明是有關於—力立^ η M Sil e -L· ββ λ-κ 種鏡頭’且特別疋有關於—種繳隹鏡頭（zoom lens)。又“、、【先前技術】隨著網路快速發展及頻寬不斷提升，高倍率及高品餅 ('之監視裔用鏡頭的需求有逐漸增加的趨勢，並且朝向小型化、輕量化及廣視角的方向發展。變焦倍率介於2〜3.5俨的中低階產品目前仍是市場上的主流，其具有相當高的成本優勢，因而能具有—定的佔有率。基於低成本的考量與滿足上述需求，大部份介於2〜3.5倍的變焦鏡頭都會採用兩組或至多二組之移動透鏡群來實現此—規格的變焦鏡頭，以達到小型化的目的。因此，如何在有限之空間下有效分配各組透鏡群的組合’進一步搭配非球面透鏡來消☆ U 像差與色差，並確保不同放大倍率時的影像品質，就顯得相當重要。 ' 请參閱第1圖’美國專利編號第5,552,937號所揭露之可變焦距鏡頭是利用G!與G2兩組透鏡群相對移動來達成放大與縮小倍率之目的。第一透鏡群Gi採用三片透鏡 (U、L2、L3)的組合，而第二透鏡群G2採用四片透鏡(L4、 L5、L6、L7)的組合。此夕卜’在第一透鏡君_ Gi及第二透鏡群G2之中都有搭配一片以上的非球面透鏡來消除像差。雖然非球面透鏡在矯正像差上能夠扮演關鍵的角色，但過多200918935 IX. Description of the invention: [Technical 4 members of the invention] The present invention relates to - Lili ^ η M Sil e -L·ββ λ-κ lens 'and particularly relevant to - kind of zoom lens . ",, [Previous technology] With the rapid development of the Internet and the increasing bandwidth, high-rate and high-quality cakes (the demand for surveillance cameras has gradually increased, and is becoming smaller, lighter and wider). The development of the viewing angle. The medium and low-end products with zoom ratios between 2 and 3.5 inches are still the mainstream in the market, and they have a considerable cost advantage, so they can have a certain occupancy rate. Based on low cost considerations and satisfaction The above requirements, most of the zoom lens between 2 and 3.5 times will use two or more groups of moving lens groups to achieve this - size zoom lens to achieve miniaturization. Therefore, how to space in a limited space It is very important to effectively assign a combination of lens groups in each group to further match the aspherical lens to eliminate U aberration and chromatic aberration, and to ensure image quality at different magnifications. 'See Figure 1 'US Patent No. The variable focal length lens disclosed in No. 5,552,937 uses the relative movement of the two groups of G! and G2 to achieve magnification and reduction magnification. The first lens group Gi adopts three pieces. a combination of mirrors (U, L2, L3), and a second lens group G2 using a combination of four lenses (L4, L5, L6, L7). In this case, the first lens Jun_G and the second lens group G2 There are more than one aspherical lens to eliminate aberrations. Although aspheric lenses can play a key role in correcting aberrations, too much

Client’s Docket No·: PT1052 TT’s Docket No: 9009C-A41369TW/fmal/Hawdong/Sophia Yang 揚筑妃 200918935 的非球面透鏡在量產製作時需要更嚴格的公差要求。如上所述，倘若沒有控制好非球面透鏡之公差要求，則可變焦距鏡頭之整體良率反而不易提升。況且，由於非球面透鏡在製作上的難度較高，故較多的非球面鏡面也會造成可變焦距鏡頭之成本增加。請參閱第2圖，美國專利編號第6,839,183號所揭露之可變焦距鏡頭是利用第一透鏡群G!與第二透鏡群G2連動並搭配一固定透鏡群G3的架構來實現改變倍率的目的。此種架構雖能提供不錯的成像品質。然而，在三組透鏡群（第一透鏡群Gi、第二透鏡群G2及固定透鏡群G3)架構的變焦光學系統條件下，當改變倍率時，孔徑光欄07之位置亦需要跟著移動，並需要相對複雜的機構來做搭配，因而會導致可變焦距鏡頭之體積變大。此外，美國專利編號第5，155,629號所揭露之可變焦距鏡頭是以兩組移動的透鏡群（包含七片透鏡）來達成放大與縮小倍率之目的。然而，由於此種可變焦距鏡頭在廣角端時之光圈相對比較小，故夜間與室内使用時易造成感光元件感光不足的情況產生，因而較難滿足監視器產品對於大光圈的要求。【發明内容】本發明提供一種具有小體積、大光圈及廣視角之變焦鏡頭。本發明的其他目的和優點可以從本發明所揭露的技術特徵中得到進一步的了解。Client’s Docket No·: PT1052 TT’s Docket No: 9009C-A41369TW/fmal/Hawdong/Sophia Yang The aspherical lens of 200918935 requires more stringent tolerance requirements for mass production. As described above, if the tolerance requirements of the aspherical lens are not controlled, the overall yield of the zoom lens is not easily improved. Moreover, since the aspherical lens is more difficult to fabricate, more aspherical mirrors also increase the cost of the variable focal length lens. Referring to Fig. 2, the variable focal length lens disclosed in U.S. Patent No. 6,839,183 uses the first lens group G! in conjunction with the second lens group G2 and cooperates with a fixed lens group G3 to achieve the purpose of changing the magnification. This architecture provides good image quality. However, under the condition of the zoom optical system constructed by the three groups of lens groups (the first lens group Gi, the second lens group G2, and the fixed lens group G3), when the magnification is changed, the position of the aperture stop 07 also needs to be moved, and A relatively complex mechanism is required for the collocation, which results in a larger volume of the variable focal length lens. In addition, the variable focal length lens disclosed in U.S. Patent No. 5,155,629 is aimed at amplifying and reducing magnification by two sets of moving lens groups (including seven lenses). However, since the aperture of the variable-focus lens at the wide-angle end is relatively small, it is liable to cause insufficient photosensitivity of the photosensitive member during nighttime and indoor use, and thus it is difficult to satisfy the requirements of the monitor product for a large aperture. SUMMARY OF THE INVENTION The present invention provides a zoom lens having a small volume, a large aperture, and a wide viewing angle. Other objects and advantages of the present invention will become apparent from the technical features disclosed herein.

Client’s Docket No.: FT1052 TT’s Docket No: 9009C-A41369TW/final/Hawdong/Sophia Yang 揚筑妃严 200918935 為達上述之一或部份或全部目的或是其他目的，本發明一貫施例之變焦鏡頭包括一第一透鏡群以及一第二透鏡群。第一透鏡群與第二透鏡群的屈光度(refractive p〇wer) 分別為負、正。此外，第一透鏡群是由從一物侧（〇bject side) 至一像侧（image side)依序排列的一第一透鏡、一第二透鏡及一第二透鏡所組成，且第一透鏡、第二透鏡及第三透鏡的屈光度分別為負、負、正。第二透鏡群配置於第一透鏡群與像侧之間。第二透鏡群是由從物侧至像側依序排列的一第四透鏡、一第五透鏡、一第六透鏡及一第七透鏡所組成，且第四透鏡、第五透鏡、第六透鏡及第七透鏡的屈光度分別為正、正、負、正。其中，第一透鏡群與第二透鏡群適於在物侧與像侧之間移動，以及第四透鏡、第五透鏡、第六透鏡及第七透鏡至少其中之一為非球面透鏡。在本發明之一實施例中，上述之第四透鏡為非球面透鏡。在本發明之一實施例中’上述之第一透鏡、第二透鏡及第三透鏡分別為一球面透鏡。在本發明之一實施例中’上述之第一透鏡是凸面朝向物側的凸凹透鏡，第二透鏡是雙凹透鏡，第三透鏡是凸面朝向物侧的凹凸透鏡，第四透鏡是雙凸透鏡，第五透鏡是雙凸透鏡’第六透鏡是凹面朝向像側的凸凹透鏡，第七透鏡是雙凸透鏡。在本發明之一實施例中，上述之變焦鏡頭更包括一光欄，係固定於第一透鏡群與第二透鏡群之間。Client's Docket No.: FT1052 TT's Docket No: 9009C-A41369TW/final/Hawdong/Sophia Yang 妃 2009 200918935 In order to achieve one or a part or all of the above or other purposes, the zoom lens of the consistent embodiment of the present invention includes a first lens group and a second lens group. The refractive powers of the first lens group and the second lens group are negative and positive, respectively. In addition, the first lens group is composed of a first lens, a second lens and a second lens arranged in sequence from an object side to an image side, and the first lens The diopter of the second lens and the third lens are negative, negative, and positive, respectively. The second lens group is disposed between the first lens group and the image side. The second lens group is composed of a fourth lens, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from the object side to the image side, and the fourth lens, the fifth lens and the sixth lens The diopter of the seventh lens and the seventh lens are positive, positive, negative, and positive, respectively. Wherein the first lens group and the second lens group are adapted to move between the object side and the image side, and at least one of the fourth lens, the fifth lens, the sixth lens and the seventh lens is an aspherical lens. In an embodiment of the invention, the fourth lens is an aspherical lens. In an embodiment of the invention, the first lens, the second lens and the third lens are each a spherical lens. In one embodiment of the present invention, the first lens is a convex-concave lens having a convex surface facing the object side, the second lens is a biconcave lens, the third lens is a meniscus lens having a convex surface facing the object side, and the fourth lens is a lenticular lens. The five lens is a lenticular lens. The sixth lens is a convex-concave lens having a concave surface toward the image side, and the seventh lens is a lenticular lens. In an embodiment of the invention, the zoom lens further includes a light bar fixed between the first lens group and the second lens group.

Client’s Docket Mo.: PT1052 TT’s Docket No: 9009C-A41369TW/final/Hawdong/Sophia Yang 楊筑妃 8 200918935 在本發明之一實施例中，上逑之變焦鏡頭在一廣角端 (wide-end)時，一成像高度乃〇/〇的畸變值(〇pticaldist〇rti〇n) 與成像高度100%的畸變值之比值為χ，且0.5gx$0 56。此變焦鏡頭藉由第一透鏡群與第二透鏡群的屈光度為負、正的組合，並搭配較少的非球面透鏡即可有效減低像差與色差’達到廣角的目的。此外，變焦鏡頭在變焦的過程中，光欄固定不動，所以連動機構的設計上較為簡單。如此’ 4焦知頭的體積可以縮小’且生產成本亦可有效降低。為使本發明之上述目的、特徵和優點能更明顯易懂，下文特舉較佳實施例並配合所附圖式做詳細說明。【實施方式】有關本發明之前述及其他技術内容、特點與功效，在以下配合參考@式之-較佳貫施例的詳細說明巾，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、左、右、丽或後等’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並非用來限制本發明。第3A圖、»3B圖及帛3C圖係顯示本實施例之變焦鏡頭於不同變焦倍率時之構造示意圖，其中，f从圖係顯示變焦鏡頭處於望遠端(tele_end)時之構造示意圖，第3B 圖係顯示變焦鏡頭處於中間位置（middle f〇cal length region)時之構造示意圖，以及第3C圖係顯示變焦鏡頭處於廣角端（wide-end)時之構造示意圖。請參閱第3A圖、第3B圖及第3c圖，本實施例之變Client's Docket Mo.: PT1052 TT's Docket No: 9009C-A41369TW/final/Hawdong/Sophia Yang Yang Zhuo 8 200918935 In one embodiment of the present invention, the upper zoom lens is imaged at a wide-end end The ratio of the height of the 〇/〇 distortion (〇pticaldist〇rti〇n) to the distortion of the imaging height of 100% is χ, and 0.5gx$0 56. The zoom lens can effectively reduce the aberration and chromatic aberration to achieve wide angle by combining the negative and positive diopter of the first lens group and the second lens group with a small number of aspherical lenses. In addition, the zoom lens is fixed during the zooming process, so the linkage mechanism is relatively simple in design. Thus, the volume of the '4 focus head can be reduced' and the production cost can be effectively reduced. The above described objects, features and advantages of the present invention will become more apparent from the description of the appended claims. [Embodiment] The foregoing and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the preferred embodiments. The directional terms mentioned in the following embodiments, for example, up, down, left, right, 丽, or after, etc. are merely directions referring to the additional drawings. Therefore, the directional terminology used is for the purpose of illustration and not limitation. 3A, 3B, and 3C are schematic views showing the configuration of the zoom lens of the present embodiment at different zoom magnifications, wherein f is a schematic diagram showing the configuration of the zoom lens at telephoto end (Tele_end), 3B The figure shows a schematic diagram of the structure when the zoom lens is in the middle position (middle f〇cal length region), and the 3C figure shows the configuration diagram when the zoom lens is at the wide-end end. Please refer to FIG. 3A, FIG. 3B and FIG. 3c for the variation of this embodiment.

Client’s Docket No.: PT1052 IT’S Docket No: 9009C-A41369TW/fmai/HaWd〇ng/S〇Phia Yang 楊筑妃〇 200918935 焦鏡頭1 〇〇主要包括一第一透鏡群11 〇以及一第二透鏡群 120。第一透鏡群110與第二透鏡群120的屈光度(refractive power)分別為負、正。此外’第一透鏡群11〇是由從一物侧（object side)至一像侧（image side)依序排列的一第一透鏡111、一第二透鏡112及一第三透鏡113所組成’且第一透鏡111、第二透鏡112及第三透鏡113的屈光度分別為負、負、正。第二透鏡群120配置於第一透鏡群110與像侧之間。第二透鏡群120是由從物侧至像側依序排列的一第四透鏡121、一第五透鏡124、一第六透鏡125及一第七透鏡126所組成，且第四透鏡121、第五透鏡124、第六透鏡125及第七透鏡126的屈光度分別為正、正、負、正。其中，第一透鏡群Π0與第二透鏡120群適於在物侧與像侧之間移動，以及第四透鏡121、第五透鏡124、第六透鏡 125及第七透鏡126至少其中之一為非球面透鏡。在本實施例中，以第四透鏡121是非球面透鏡為例。上述之變焦鏡頭1〇〇中，第一透鏡m、第二透鏡112 及第三透鏡113例如分別為一球面透鏡。在本實施例中，第一透鏡111是凸面朝向物侧的凸凹透鏡，第二透鏡112 是雙凹透鏡，第三透鏡113是凸面朝向物侧的凹凸透鏡，第四透鏡121是雙凸透鏡，第五透鏡124是雙凸透鏡，第六透鏡125是凹面朝向像侧的凸凹透鏡，第七透鏡126是雙凸透鏡。此外，變焦鏡頭100更包括一光攔13〇，固定於第— 透鏡群110與第二透鏡群120之間，其可根據實際運作需Client's Docket No.: PT1052 IT'S Docket No: 9009C-A41369TW/fmai/HaWd〇ng/S〇Phia Yang Yang Zhu妃〇 200918935 The focal lens 1 〇〇 mainly includes a first lens group 11 〇 and a second lens group 120. The refractive power of the first lens group 110 and the second lens group 120 is negative and positive, respectively. In addition, the 'first lens group 11' is composed of a first lens 111, a second lens 112, and a third lens 113 which are sequentially arranged from an object side to an image side. The diopter of the first lens 111, the second lens 112, and the third lens 113 are negative, negative, and positive, respectively. The second lens group 120 is disposed between the first lens group 110 and the image side. The second lens group 120 is composed of a fourth lens 121, a fifth lens 124, a sixth lens 125, and a seventh lens 126 which are sequentially arranged from the object side to the image side, and the fourth lens 121 and the second lens 121 The diopter of the fifth lens 124, the sixth lens 125, and the seventh lens 126 are positive, positive, negative, and positive, respectively. The first lens group Π0 and the second lens 120 group are adapted to move between the object side and the image side, and at least one of the fourth lens 121, the fifth lens 124, the sixth lens 125, and the seventh lens 126 is Aspherical lens. In the present embodiment, the fourth lens 121 is an aspherical lens as an example. In the zoom lens 1 described above, the first lens m, the second lens 112, and the third lens 113 are each, for example, a spherical lens. In the present embodiment, the first lens 111 is a convex-concave lens having a convex surface facing the object side, the second lens 112 is a biconcave lens, the third lens 113 is a meniscus lens having a convex surface toward the object side, and the fourth lens 121 is a lenticular lens, and the fifth lens The lens 124 is a lenticular lens, the sixth lens 125 is a convex-concave lens having a concave surface toward the image side, and the seventh lens 126 is a lenticular lens. In addition, the zoom lens 100 further includes a light barrier 13 〇 fixed between the first lens group 110 and the second lens group 120, which can be operated according to actual needs.

Client’s Docket No.: PT1052 TT’s Docket No: 9009C-A41369TW/fmal/Hawdong/Sophia Yang 揚筑妃 10 200918935 求來調整變焦鏡頭1〇〇之光圈大小（或入射光量）。舉例來說，本實施例之變焦鏡頭100之光圈大小可藉由光攔13〇之调整’決定廣角端的變化從F/1.6與望遠端從F/3.3到完全關閉。如上所述’利用六片球面透鏡與一片非球面透鏡，搭配光學屈光度分別為負正之第一透鏡群11()及第二透鏡群 12〇的組合，本實施例之變焦鏡頭1〇〇即可消除像差與色差以及實現小型化與廣角的效果。在本實施例之中，當變焦鏡頭100改變倍率時，第一透鏡群110及第二透鏡群12〇會進行相對移動。舉例來說，奚’欠焦1¾頭100之倍率變小時，亦即，當變焦鏡頭1⑼之倍率由望遠端（如第3A圖所示）變成中間位置（如第3B圖所示）或由中間位置變成廣角端（如第3C圖所示）時，第一透鏡群110與第二透鏡群120會朝彼此遠離之方向移動。反之^受焦知頭1 00之倍率變大時，亦即，當變焦鏡頭1 〇〇之倍率由廣角端變成中間位置或由中間位置變成望遠端時，第一透鏡群110與第二透鏡群12〇會朝彼此接近之方向移動。特別的是，不論第一透鏡群110與第二透鏡群12〇如何相對移動（或在變焦鏡頭100改變焦距之過程中），光攔130之位置皆是保持固定。如上所述，用來驅使光欄i3〇移動之複雜機構即可省略，因而可利於變焦鏡頭1〇〇之小型化及降低其製造成本。另外’本實施例之變焦鏡頭100在倍率從1倍到27 倍的範圍時，其可以透過略為縮小光圈之方式來實現長景Client’s Docket No.: PT1052 TT’s Docket No: 9009C-A41369TW/fmal/Hawdong/Sophia Yang 扬建妃 10 200918935 Find the aperture size (or incident light) of the zoom lens. For example, the aperture size of the zoom lens 100 of the present embodiment can be determined by the adjustment of the light barrier 13' to determine the wide-angle end change from F/1.6 and telephoto end from F/3.3 to full closure. As described above, the zoom lens of the present embodiment can be used by using a combination of a six-spherical lens and an aspherical lens, and a combination of the first lens group 11 () and the second lens group 12 that are optically dioptric, respectively. Eliminate aberrations and chromatic aberrations and achieve miniaturization and wide-angle effects. In the present embodiment, when the zoom lens 100 changes the magnification, the first lens group 110 and the second lens group 12 〇 are relatively moved. For example, 奚 'underfocus 13⁄4 head 100 magnification becomes smaller, that is, when the zoom lens 1 (9) magnification is changed from the telephoto end (as shown in Fig. 3A) to the intermediate position (as shown in Fig. 3B) or by the middle When the position becomes the wide-angle end (as shown in FIG. 3C), the first lens group 110 and the second lens group 120 move in directions away from each other. On the other hand, when the magnification of the focus head becomes larger, that is, when the magnification of the zoom lens 1 is changed from the wide-angle end to the intermediate position or from the intermediate position to the telephoto end, the first lens group 110 and the second lens group 12〇 will move in the direction of approaching each other. In particular, regardless of how the first lens group 110 and the second lens group 12 are relatively moved (or during the change of the focal length of the zoom lens 100), the position of the light barrier 130 remains fixed. As described above, the complicated mechanism for driving the diaphragm i3〇 can be omitted, thereby facilitating the miniaturization of the zoom lens and reducing the manufacturing cost thereof. Further, when the zoom lens 100 of the present embodiment has a magnification ranging from 1 time to 27 times, it can realize a long scene by slightly reducing the aperture.

Client's Docket No.： PT1052 TT s Docket No: 9〇〇9C-A41369TW/final/Hawdong/Sophia Yang 楊筑妃 200918935 深（depth of field)的特性，亦即，當拍攝不同距離之物體時’即使是不進行對焦之動作’透過機構控制第一透鏡群 110與第二透鏡群120連動之方式就能確保不同拍攝距離的光學成像品質。再者，本實施例之變焦鏡頭1〇〇在設計時是以採用較大的感光元件105為前提。然而，即使是採用較小的感光元件’本發明實施例所揭露之變焦鏡頭依然能夠提供良好的可視範圍。此外，在本實施例之變焦鏡碩1〇〇之中’當該變焦鏡頭在-廣角端時’成像高度75%的畸變值dist〇rti〇n) 與成像高度loo%的畸變值之比值為χ，且〇.5$χ$〇 56。以下内容將舉出變焦鏡頭100之一較佳實施例，然而，下述之〈表一〉、〈表二〉及〈表三〉中所列的數據資料並非用以限定本發明’任何熟f此技術領域之人士在參照本發明之後’當可對其參數或設定做適當的更動，惟其仍應屬於本發明之範疇内。〈表一) 表面曲率半徑 (mm) 間距（mm) ---- 折射率色散值備註 SI 25.00000 0.850000 —_ 1.7292 54.7 第一透鏡 S2 6.23000 3.900000 S3 -17.58000 0.800000 1.6230 58.2 第二透鏡Client's Docket No.: PT1052 TT s Docket No: 9〇〇9C-A41369TW/final/Hawdong/Sophia Yang 杨筑妃200918935 Deep (depth of field) characteristics, that is, when shooting objects of different distances, even if not The focusing operation 'transmitting mechanism controls the first lens group 110 and the second lens group 120 to ensure the optical imaging quality of different shooting distances. Furthermore, the zoom lens 1 of the present embodiment is premised on the assumption that a large photosensitive element 105 is used. However, even with a small photosensitive element, the zoom lens disclosed in the embodiment of the present invention can provide a good viewing range. Further, in the zoom lens of the present embodiment, the ratio of the distortion value dist〇rti〇n of the imaging height of 75% when the zoom lens is at the wide-angle end to the distortion value of the imaging height loo% is χ, and 〇.5$χ$〇56. The following will describe a preferred embodiment of the zoom lens 100. However, the data listed in <Table 1>, <Table 2>, and <Table 3> below are not intended to limit the present invention. Those skilled in the art will be able to make appropriate changes to their parameters or settings after reference to the present invention, but still fall within the scope of the present invention. <Table 1) Surface Curvature radius (mm) Spacing (mm) ---- Refractive index Dispersion value Remarks SI 25.00000 0.850000 —_ 1.7292 54.7 First lens S2 6.23000 3.900000 S3 -17.58000 0.800000 1.6230 58.2 Second lens

Client’s Docket No.: PT1052 TT’s Docket No: 9009C-A41369TW/fmal/Hawciong/Sophia Yang 揚筑妃 12 200918935 S4 30.43000 0.300000 S5 15.21000 1.750000 1.847 23.8 第三透鏡 S6 66.47000 可變間距 dl S7 無限大可變間距 d2 光搁 S8 8.84000 2.550000 1.5891 61.2 第四透鏡 S9 -28.62000 0.190000 S10 9.08000 2.630000 1.497 81.5 第五透鏡 Sll -30.49000 0.220000 S12 20.58000 0.800000 1.847 23.8 第六透鏡 S13 5.22000 1.910000 S14 12.88000 3.000000 1.580 40.8 第七透鏡 S15 -87.14000 可變間距 d3 S16 無限大 2.500000 1.517 64.1 低通遽波器 S17 無限大 0.811000 S18 無限大〇.〇〇〇〇〇〇感光元Client's Docket No.: PT1052 TT's Docket No: 9009C-A41369TW/fmal/Hawciong/Sophia Yang 扬妃妃 12 200918935 S4 30.43000 0.300000 S5 15.21000 1.750000 1.847 23.8 Third lens S6 66.47000 Variable pitch dl S7 Infinitely variable pitch d2 light S8 8.84000 2.550000 1.5891 61.2 Fourth lens S9 -28.62000 0.190000 S10 9.08000 2.630000 1.497 81.5 Fifth lens S11 -30.49000 0.220000 S12 20.58000 0.800000 1.847 23.8 Sixth lens S13 5.22000 1.910000 S14 12.88000 3.000000 1.580 40.8 Seventh lens S15 -87.14000 Variable pitch D3 S16 Infinite 2.500000 1.517 64.1 Low Pass Chopper S17 Infinite 0.811000 S18 Infinite 〇. 〇〇〇〇〇〇 Photosensitive Element

Client’s Docket No.: PT1052 TT’s Docket No: 9009C-A41369TW/fmal/Hawdong/Sophia Yang 楊筑妃 13 200918935Client’s Docket No.: PT1052 TT’s Docket No: 9009C-A41369TW/fmal/Hawdong/Sophia Yang Yang Zhujing 13 200918935

X i+-7i-(i+k)(h/r)2 + AH4 + BH6 + CH8 + DH1 件 S8、S9可以下面公式表示： (1/R)H2X i+-7i-(i+k)(h/r)2 + AH4 + BH6 + CH8 + DH1 Pieces S8 and S9 can be expressed by the following formula: (1/R)H2

其中’X為光轴方向之偏移量。R是密切球面（osculating sphere)的半徑，也就是接近光軸處的曲率半徑（如〈表一〉内S8、S9的曲率半徑）。Η是非球面高度，即為從透鏡中心往透鏡邊緣的南度’從公式中得知，不同的Η會對應出不同的X值。在本設計中，Κ=0，而A、Β、C、D為非球面係數(aspheric coefficient)。S8、S9的非球面係數如下列〈表二〉所示。〈表二〉表 A B C D 面 S8 -0.302196E-03 0.163394E-05 0.670984E-07 -0.331064E-08 S9 0.165428E-03 0.108694E-05 0.182067E-06 -0.544554E-08 在〈表一〉中，曲率半徑(mm)係指每一表面之曲率半徑，間距(mm)係指兩相鄰表面間之距離，舉例來說，表面 S1之間距係指表面S1至表面S2間之距離。備註攔中各透鏡所對應之厚度、折射率及色散值請參閱同列中各間距、折射率（refractive index)及色散值（Abbe number)所對應之數值。此外，在表一中，表面S1及S2分別為第一透鏡111 遠離及鄰近第二透鏡112之兩表面，表面S3及S4分別為第二透鏡112遠離及鄰近第三透鏡113之兩表面，表面S5 及S6分別為第三透鏡113遠離及鄰近第四透鏡121之兩表Where 'X is the offset of the optical axis direction. R is the radius of the osculating sphere, that is, the radius of curvature near the optical axis (such as the radius of curvature of S8 and S9 in <Table 1>). Η is the aspherical height, which is the south degree from the center of the lens to the edge of the lens. From the formula, different Η will correspond to different X values. In this design, Κ = 0, and A, Β, C, and D are aspheric coefficients. The aspherical coefficients of S8 and S9 are as shown in the following Table 2. <Table 2> Table ABCD Surface S8 -0.302196E-03 0.163394E-05 0.670984E-07 -0.331064E-08 S9 0.165428E-03 0.108694E-05 0.182067E-06 -0.544554E-08 In <Table 1> The radius of curvature (mm) refers to the radius of curvature of each surface, and the pitch (mm) refers to the distance between two adjacent surfaces. For example, the distance between the surfaces S1 refers to the distance between the surface S1 and the surface S2. For the thickness, refractive index, and dispersion value of each lens in the remarks, refer to the values in the same column for each pitch, refractive index, and dispersion value (Abbe number). In addition, in Table 1, the surfaces S1 and S2 are respectively the surfaces of the first lens 111 away from and adjacent to the second lens 112, and the surfaces S3 and S4 are respectively the surfaces of the second lens 112 away from and adjacent to the third lens 113. S5 and S6 are respectively two tables of the third lens 113 away from and adjacent to the fourth lens 121

Client’s Docket No.: PT1052 TT，s Docket No: 9009C-A41369TW/final/Hawdong/Sophia Yang 揚筑妃 14 200918935 面，表面S7為控制入射光量之光攔130的表面，表面S8 及S9分別為第四透鏡遠離及鄰近第五透鏡124之兩表面’ 表面S10及S11分別為第五透鏡124遠離及鄰近第六透鏡 125之兩表面，表面S12及S13分別為第六透鏡Π5遠離及鄰近第七透鏡126之兩表面，表面S14及S15分別為第七透鏡126遠離及鄰近低通濾波器140之兩表面’表面S16 及S17分別為低通濾波器140遠離及鄰近感光元件1〇5之兩表面，以及表面S18為感光元件1〇5之表面。在本實施例中，當變焦鏡頭1〇〇用於取像時，像側所設置感光元件 105，如電荷 |禹合元件（charge coupled device, CCD)或 CMOS影像感測元件。當變焦鏡頭300用於投影時，像側可設置光閥（light valve) ’如數位微鏡元件（digital micro-mirror deivce)或單晶矽液晶顯示面板crystai on silicon panel, LCOS panel)。〈表三〉廣角端 ** 一中間位置望遠端有效焦距（EFL) 3 · 7 mm 5.5 mm 12 mm 視場角（FOV) 97.6〇 '——- 62.60 28.4° F數值（F/#) 1.6 1.8 3.3 可變間距 (mm) dl 12 mm 4.87 mm 可變間距 (mm) d2 9.48 mm 7.62 mm _ \ / d3 2.3 mm --—— 5.16 mm ---— 在〈表三〉中分別列出變焦鏡頭100於廣角端、中間Client's Docket No.: PT1052 TT, s Docket No: 9009C-A41369TW/final/Hawdong/Sophia Yang Yang 妃 14 200918935 Surface, surface S7 is the surface of the light barrier 130 that controls the amount of incident light, and the surfaces S8 and S9 are respectively the fourth The lens is away from and adjacent to the two surfaces of the fifth lens 124. The surfaces S10 and S11 are respectively the fifth lens 124 away from and adjacent to the two surfaces of the sixth lens 125. The surfaces S12 and S13 are respectively the sixth lens Π5 away from and adjacent to the seventh lens 126. The two surfaces, the surfaces S14 and S15 are respectively the second lens 126 away from and adjacent to the two surfaces of the low-pass filter 140. The surfaces S16 and S17 are respectively the two surfaces of the low-pass filter 140 away from and adjacent to the photosensitive element 1〇5, and The surface S18 is the surface of the photosensitive member 1〇5. In the present embodiment, when the zoom lens 1 is used for image pickup, a photosensitive element 105 such as a charge coupled device (CCD) or a CMOS image sensing element is disposed on the image side. When the zoom lens 300 is used for projection, the image side may be provided with a light valve such as a digital micro-mirror deivce or a single crystal liquid crystal display panel (Crystai on silicon panel, LCOS panel). <Table 3> Wide-angle end ** An intermediate position telephoto effective focal length (EFL) 3 · 7 mm 5.5 mm 12 mm Field of view (FOV) 97.6〇'——- 62.60 28.4° F value (F/#) 1.6 1.8 3.3 Variable pitch (mm) dl 12 mm 4.87 mm Variable pitch (mm) d2 9.48 mm 7.62 mm _ \ / d3 2.3 mm --- 5.16 mm --- — The zoom lens is listed in <Table 3> 100 at the wide end, in the middle

Client’s Docket No.: PT1052 TT’s Docket No: 9009C-A41369TW/fmal/Hawdong/Sophia Yang 楊筑妃 15 200918935 位置及望遠端時的一些重要參數值，包括有效焦距 (effective focal length，EFL)、視場角（f〇V)、F 數值(F/#) 及可變間距dl、d2、d3。由於本實施例之變焦鏡頭100的F數值可小至1.6,所以具有光圈較大的優點。此外’變焦鏡頭1 〇〇在廣角端的視場角可達97度，所以具有廣角的優點。第4A圖、第4B圖及第4C圖分別為對應第3A圖、第 3B圖及第3C圖之變焦鏡頭100之成像光學模擬數據圖。清參考弟4A圖、弟4B圖及第4C圖，由於縱向球差 (longitudinal spherical aberration)、畸變（distortion)、像散場曲（astigmatism field curves)或橫向色差（iater c〇l〇r)之圖形均是在標準的範圍内，故變焦鏡頭loo具有良好的光學品質。值得注意的是，由於光的可逆原理，熟習此技術領域者亦可將前述之參數做適當的更動，以使本發明之變焦鏡頭適用於監視器產品中，惟其亦仍應屬於本發明之範®壽内。綜上所述，本發明實施例所揭露之變焦鏡頭藉由第一透鏡群與第二透鏡群的屈光度為負、正的組合，並搭配較少的非球面透鏡即可有效減低像差與色差，達到廣角及大光圈的目的。此外，變焦鏡頭在變焦的過程中，光欄固定不動，所以連動機構的設計上較為簡單。如此，變焦鏡頭的體積可以縮小，且生產成本亦可有效降低。即使應用不同尺寸之感光元件時，也不會有視角不足的情況產生。惟以上所述者，僅為本發明之較佳實施例而已，當不Client's Docket No.: PT1052 TT's Docket No: 9009C-A41369TW/fmal/Hawdong/Sophia Yang Yang Zhuji 15 200918935 Some important parameter values at the position and telephoto end, including effective focal length (EFL), field of view (f 〇V), F value (F/#) and variable spacing dl, d2, d3. Since the F-number of the zoom lens 100 of the present embodiment can be as small as 1.6, there is an advantage that the aperture is large. In addition, the zoom lens 1 has an angle of view of up to 97 degrees at the wide-angle end, so it has the advantage of wide angle. 4A, 4B, and 4C are imaging optical simulation data maps of the zoom lens 100 corresponding to FIGS. 3A, 3B, and 3C, respectively. Clear reference to 4A, 4B and 4C, due to longitudinal spherical aberration, distortion, astigmatism field curves or lateral chromatic aberration (iater c〇l〇r) Both are within the standard range, so the zoom lens loo has good optical quality. It should be noted that due to the reversible principle of light, those skilled in the art can also make appropriate adjustments to the aforementioned parameters, so that the zoom lens of the present invention is suitable for use in a monitor product, but it should still belong to the scope of the present invention. ® Shou. In summary, the zoom lens disclosed in the embodiment of the present invention can effectively reduce the aberration and chromatic aberration by combining the diopter of the first lens group and the second lens group with a negative and positive combination with a small aspherical lens. To achieve the purpose of wide angle and large aperture. In addition, the zoom lens is fixed during the zooming process, so the linkage mechanism is relatively simple in design. Thus, the size of the zoom lens can be reduced, and the production cost can be effectively reduced. Even when photosensitive elements of different sizes are applied, there is no shortage of viewing angles. However, the above is only the preferred embodiment of the present invention, when not

Clienfs Docket No.: PT1052 TT’s Docket No: 9009C-A41369TW/fmal/Hawdong/Sophia Yang 揚筑妃 16 200918935 能以此限定本發明實施之範圍，即大凡依本發明申請專利範圍及發明說明内容所作之簡單的等效變化與修飾，皆仍屬本發明專利涵蓋之範圍内。另外本發明的任一實施例或申請專利範圍不須達成本發明所揭露之全部目的或優點或特點。此外，摘要部分和標題僅是用來輔助專利文件搜尋之用，並非用來限制本發明之權利範圍。【圖式簡單說明】第1圖係顯示一種習知之可變焦距鏡頭之構造示意圖；第2圖係顯示另一種習知之可變焦距鏡頭之構造示意圖，第3A圖係顯示本發明一實施例之變焦鏡頭處於望遠端時之構造示意圖；第3B圖係顯示本發明一實施例之變焦鏡頭處於中間位置時之構造示意圖；第3C圖係顯示本發明一實施例之變焦鏡頭處於廣角端時之構造示意圖；第4A圖係顯示對應第3A圖之變焦鏡頭之成像光學數據模擬圖；第4B圖係顯示對應第3B圖之變焦鏡頭之成像光學數據模擬圖；以及第4C圖係顯示對應第3C圖之變焦鏡頭之成像光學數據模擬圖。Clienfs Docket No.: PT1052 TT's Docket No: 9009C-A41369TW/fmal/Hawdong/Sophia Yang Yangzhuo 16 200918935 This can limit the scope of implementation of the present invention, that is, the simplicity of the patent application scope and the description of the invention. Equivalent variations and modifications are still within the scope of the invention. In addition, any of the objects or advantages or features of the present invention are not required to be achieved by any embodiment or application of the invention. In addition, the abstract sections and headings are only used to assist in the search of patent documents and are not intended to limit the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the construction of a conventional variable focal length lens; Fig. 2 is a view showing the construction of another conventional variable focal length lens, and Fig. 3A is a view showing an embodiment of the present invention; FIG. 3B is a schematic structural view showing a zoom lens according to an embodiment of the present invention in an intermediate position; and FIG. 3C is a view showing a configuration in which the zoom lens according to an embodiment of the present invention is at a wide angle end; Fig. 4A is a simulation diagram of imaging optical data corresponding to the zoom lens of Fig. 3A; Fig. 4B is a simulation image of imaging optical data corresponding to the zoom lens of Fig. 3B; and Fig. 4C shows a corresponding 3C diagram Imaging optical data simulation of the zoom lens.

Client's Docket No.: PT1052 TT’s Docket No: 9009C-A41369TW/flnal/Hawdong/Sophia Yang 揚筑妃 17 200918935 【主要元件符號說明】 G:〜第一透鏡群 G2〜第二透鏡群 G3〜固定透鏡群 LI、L2、L3、L4、L5、L6、L7〜透鏡 07〜孔徑光欄 100〜變焦鏡頭 105〜感光元件 110〜第一透鏡群 111〜第一透鏡 112〜第二透鏡 113〜第三透鏡 120〜第二透鏡群 121〜第四透鏡 124〜第五透鏡 125〜第六透鏡 126〜第七透鏡 130〜光搁 140〜低通濾波器Client's Docket No.: PT1052 TT's Docket No: 9009C-A41369TW/flnal/Hawdong/Sophia Yang 扬建妃17 200918935 [Description of main component symbols] G: ~1st lens group G2~2nd lens group G3~Fixed lens group LI , L2, L3, L4, L5, L6, L7 to lens 07 to aperture stop 100 to zoom lens 105 to photosensitive element 110 to first lens group 111 to first lens 112 to second lens 113 to third lens 120 to Second lens group 121 to fourth lens 124 to fifth lens 125 to sixth lens 126 to seventh lens 130 to light shelf 140 to low pass filter

Sll、 S卜 S2、S3、S4、S5、S6 ' S7、S8、S9、S10 S12、S13、S14、S15、S16、S17、S18〜表面S11, Sb S2, S3, S4, S5, S6 'S7, S8, S9, S10 S12, S13, S14, S15, S16, S17, S18~ surface

Client's Docket No.: PT1052 TT’s Docket No: 9009C-A41369TW/fmal/Hawdong/Sophia Yang 揚筑妃 18Client's Docket No.: PT1052 TT’s Docket No: 9009C-A41369TW/fmal/Hawdong/Sophia Yang

Claims

200918935 十、申請專利範圍： 1. 一種變焦鏡頭，包括：一第一透鏡群，具有負屈光度，該第一透鏡群是由從一物側至一像侧依序排列的一第一透鏡、一第二透鏡及一第三透鏡所組成，且該第一透鏡、該第二透鏡及該第三透鏡的屈光度分別為負、負、正；以及一第二透鏡群，配置於該第一透鏡群與該像侧之間，且具有正屈光度，該第二透鏡群是由從該物侧至該像側依序排列的一第四透鏡、一第五透鏡、一第六透鏡及一第七透鏡所組成，且該第四透鏡、該第五透鏡、該第六透鏡及該第七透鏡的屈光度分別為正、正、負、正，其中，該第一透鏡群與該第二透鏡群適於在該物侧與該像側之間移動，以及該第四透鏡、該第五透鏡、該第六透鏡及該第七透鏡至少其中之一為非球面透鏡。 2. 如申請專利範圍第1項所述之變焦鏡頭，其中該第四透鏡為一非球面透鏡。 3. 如申請專利範圍第1項所述之變焦鏡頭，其中該第一透鏡、該第二透鏡及該第三透鏡分別為一球面透鏡。 4. 如申請專利範圍第1項所述之變焦鏡頭，其中，該第一透鏡是一凸面朝向該物侧的凸凹透鏡，該第二透鏡是一雙凹透鏡，該第三透鏡是一凸面朝向該物侧的凹凸透鏡，該第四透鏡是一雙凸透鏡，該第五透鏡是一雙凸透鏡，該第六透鏡是一凹面朝向該像侧的凸凹透鏡，該第七透鏡是一雙凸透鏡。 Client's Docket No.: PT1052 TT’s Docket No: 9009C-A41369TW/final/Hawdong/Sophia Yang 楊筑妃 19 200918935 5. 如申請專利範圍第1項所述之變焦鏡頭，更包括一光攔，係固定於該第一透鏡群與該第二透鏡群之間。 6. 如申請專利範圍第1項所述之變焦鏡頭，其中當該變焦鏡頭在一廣角端時，一成像高度75%的畸變值 (optical distortion)與該成像高度100%的畴變值之比值為 X，且 0.5 S xS 0.56。 / Client’s Docket No.: PT1052 TT’s Docket No: 9009C-A41369TW/fmal/Hawdong/SopMa Yang 楊筑妃200918935 X. Patent Application Range: 1. A zoom lens comprising: a first lens group having a negative refracting power, the first lens group being a first lens sequentially arranged from an object side to an image side; a second lens and a third lens, wherein the diopter of the first lens, the second lens, and the third lens are negative, negative, and positive, respectively; and a second lens group disposed on the first lens group Between the image side and the positive refracting power, the second lens group is a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence from the object side to the image side. The diopter of the fourth lens, the fifth lens, the sixth lens, and the seventh lens are positive, positive, negative, and positive, respectively, wherein the first lens group and the second lens group are adapted Moving between the object side and the image side, and at least one of the fourth lens, the fifth lens, the sixth lens, and the seventh lens is an aspherical lens. 2. The zoom lens of claim 1, wherein the fourth lens is an aspherical lens. 3. The zoom lens of claim 1, wherein the first lens, the second lens, and the third lens are each a spherical lens. 4. The zoom lens of claim 1, wherein the first lens is a convex-concave lens having a convex surface facing the object side, and the second lens is a double concave lens, the third lens is a convex surface facing the convex lens The convex lens of the object side, the fourth lens is a lenticular lens, the fifth lens is a lenticular lens, and the sixth lens is a convex-concave lens having a concave surface facing the image side, and the seventh lens is a lenticular lens. Client's Docket No.: PT1052 TT's Docket No: 9009C-A41369TW/final/Hawdong/Sophia Yang Yang Zhuji 19 200918935 5. The zoom lens according to claim 1, further comprising a light barrier fixed to the first Between the lens group and the second lens group. 6. The zoom lens according to claim 1, wherein when the zoom lens is at a wide-angle end, a ratio of an optical distortion of 75% of the imaging height to a domain variable of the imaging height of 100% It is X and 0.5 S xS 0.56. / Client’s Docket No.: PT1052 TT’s Docket No: 9009C-A41369TW/fmal/Hawdong/SopMa Yang Yang Zhuyu