廣角成像鏡片組Wide-angle imaging lens set
【1】 本發明係與廣角成像鏡片組有關，特別是指一種應用於電子產品上的小型化四片式廣角成像鏡片組。[1] The present invention relates to a wide-angle imaging lens set, and more particularly to a miniaturized four-piece wide-angle imaging lens set applied to an electronic product.
【2】 隨著具有攝影功能的電子產品的興起，光學系統的需求日漸提高。拍攝中，為獲得較寬的拍攝範圍，需要鏡頭之視角滿足一定要求，因而對於鏡頭拍攝角度與畫質的要求也越來越嚴格。通常鏡頭的畫角(視場角FOV)設計為50度到60度，如果超過以上設計的角度，不僅像差較大，鏡頭的設計也較為複雜。習知US 8335043、US 8576497使用2 鏡片群，5~6片來達到大角度目的，然其歪曲(distortion)太大，而如US 8593737、US 8576497、US 8395853，其雖然可達到大角度目的，但其鏡頭組的總長度(TL)卻太長。 【3】 是以，如何開發出一種小型化的廣角成像鏡片組，其除了可配置在數位相機使用的鏡頭、網路相機使用的鏡頭或行動電話鏡頭等電子產品之外，更具有較大畫角、降低像差的功效，以降低鏡頭設計的複雜性，即是本發明研發的動機。[2] With the rise of electronic products with photography capabilities, the demand for optical systems is increasing. In the shooting, in order to obtain a wider shooting range, the angle of view of the lens is required to meet certain requirements, and thus the requirements for the angle and quality of the lens are becoming stricter. Usually, the angle of the lens (the field of view FOV) is designed to be 50 to 60 degrees. If the angle of the above design is exceeded, not only the aberration is large, but also the design of the lens is complicated. Conventional US 8335043, US 8576497 use 2 lens groups, 5-6 pieces to achieve a large angle purpose, but its distortion is too large, and such as US 8593737, US 8576497, US 8395853, although it can achieve a large angle purpose, However, the total length (TL) of the lens group is too long. [3] Therefore, how to develop a miniaturized wide-angle imaging lens set, which can be equipped with a lens for a digital camera, a lens for a network camera, or a mobile phone lens, etc. The horn, the effect of reducing the aberration, to reduce the complexity of the lens design, is the motivation for the development of the present invention.
【4】 本發明之目的在於提供一種廣角成像鏡片組，尤指一種提升畫角、具高解析能力、短鏡頭長度、小歪曲的四片式廣角成像鏡片組。 【5】 緣是，為了達成前述目的，依據本發明所提供之一種廣角成像鏡片組，由物側至像側依序包含：一光圈；一第一透鏡，具有正屈折力，其物側表面近光軸處為凸面，其像側表面近光軸處為凸面，其物側表面與像側表面至少一表面為非球面；一第二透鏡，具有負屈折力，其物側表面近光軸處為凹面，其物側表面與像側表面至少一表面為非球面；一第三透鏡，具有正屈折力，其像側表面近光軸處為凸面，其物側表面與像側表面至少一表面為非球面；一第四透鏡，具有負屈折力，其物側表面近光軸處為凸面，其物側表面與像側表面至少一表面為非球面，其物側表面及像側表面至少一表面具有至少一反曲點； 【6】 其中該第一透鏡的焦距為f1，該第二透鏡與第三透鏡的合成焦距為f23，並滿足下列條件：0.4＜ f1/f23 ＜ 1.7。 【7】 當f1/f23滿足上述條件時，則可令該廣角成像鏡片組在獲得廣泛的畫角(視場角)的同時，其解像能力顯著提昇。 【8】 較佳地，該第三透鏡的物側表面近光軸處為凹面、像側表面近光軸處為凸面；該第四透鏡的物側表面近光軸處為凸面、像側表面近光軸處為凹面。 【9】 較佳地，該第一透鏡的焦距為f1，該第二透鏡的焦距為f2，並滿足下列條件：-0.9 ＜ f1/f2 ＜ -0.3。藉此，使該第一透鏡與該第二透鏡的屈折力配置較為合適，可有利於獲得廣泛的畫角(視場角)且減少系統像差的過度增大。 【10】 較佳地，該第二透鏡的焦距為f2，該第三透鏡的焦距為f3，並滿足下列條件：-4.2 ＜ f2/f3 ＜ -1.3。藉此，使該第二透鏡與該第三透鏡的屈折力配置較為平衡，有助於像差的修正與敏感度的降低。 【11】 較佳地，該第三透鏡的焦距為f3，該第四透鏡的焦距為f4，並滿足下列條件：-1.1 ＜ f3/f4 ＜ -0.4。藉此，有利於確保該第三透鏡與該第四透鏡形成的一正一負的望遠(Telephoto)結構，可有效降低系統光學總長度。 【12】 較佳地，該第一透鏡的焦距為f1，該第三透鏡的焦距為f3，並滿足下列條件：0.7 ＜ f1/f3 ＜ 2.1。藉此，有效分配第一透鏡的正屈折力，降低廣角成像鏡片組的敏感度。 【13】 較佳地，該第二透鏡的焦距為f2，該第四透鏡的焦距為f4，並滿足下列條件：0.55 ＜ f2/f4 ＜ 4.0。藉此，系統的負屈折力分配較為合適，有利於修正系統像差以提高系統成像品質。 【14】 較佳地，該第二透鏡與第三透鏡的合成焦距為f23，該第四透鏡的焦距為f4，並滿足下列條件：-1.3 ＜ f23/f4 ＜ -0.6。藉此，則可令該廣角成像鏡片組在獲得廣泛的畫角(視場角)的同時，其解像能力顯著提昇。 【15】 較佳地，該第一透鏡與第二透鏡的合成焦距為f12，該第三透鏡與第四透鏡的合成焦距為f34，並滿足下列條件：0.3 ＜ f12/f34 ＜ 2.2。藉此，可有利於獲得廣泛的畫角(視場角)及有效修正像面彎曲。 【16】 較佳地，該廣角成像鏡片組的整體焦距為f，該第一透鏡的物側表面至成像面於光軸上的距離為TL，並滿足下列條件：0.5 ＜ f/TL ＜ 0.8。藉此，可有利於獲得廣泛的畫角(視場角)及有利於維持該廣角成像鏡片組的小型化，以搭載於輕薄的電子產品上。 【17】 較佳地，其中該廣角成像鏡片組的最大視場角為FOV，並滿足下列條件：75 ＜ FOV＜ 95。藉此，使該廣角成像鏡片組可具有適當之較大視場角。 【18】 較佳地，該第二透鏡於光軸上的厚度為CT2，該第一透鏡於光軸上的厚度為CT1，並滿足下列條件：0.2 ＜ CT2/ CT1 ＜ 0.7。藉此，使第一透鏡與第二透鏡有適當的厚度，使射出成型較容易。 【19】 較佳地，該第一透鏡與第二透鏡於光軸上的間隔距離為T12，該第二透鏡於光軸上的厚度為CT2，並滿足下列條件：0.05 ＜ T12/CT2 ＜ 1.25。藉此，可以進一步增大該廣角成像鏡片組的最大視場角。 【20】 較佳地，該第一透鏡的像側表面曲率半徑為R2，該第二透鏡的物側表面曲率半徑為R3，並滿足下列條件：0.01 ＜ R2/R3 ＜ 4.3。有效降低該廣角成像鏡片組的球差與像散。 【21】 較佳地，該第一透鏡的色散係數為V1，該第二透鏡的色散係數為V2，並滿足下列條件：30 ＜ V1-V2＜ 42。藉此，有效降低廣角成像鏡片組的色差。 【22】 有關本發明為達成上述目的，所採用之技術、手段及其他之功效，茲舉八較佳可行實施例並配合圖式詳細說明如後。[4] The object of the present invention is to provide a wide-angle imaging lens set, in particular to a four-piece wide-angle imaging lens set with improved drawing angle, high resolution, short lens length and small distortion. [5] The edge is that, in order to achieve the above object, a wide-angle imaging lens set according to the present invention includes, in order from the object side to the image side, an aperture; a first lens having a positive refractive power and an object side surface thereof; The near optical axis is a convex surface, and the image side surface is convex at the near optical axis, and at least one surface of the object side surface and the image side surface is aspherical; a second lens has a negative refractive power, and the object side surface is near the optical axis a concave surface, at least one surface of the object side surface and the image side surface is aspherical; a third lens having a positive refractive power, the image side surface having a convex surface at a near optical axis, and an object side surface and an image side surface at least one The surface is aspherical; a fourth lens has a negative refractive power, and the object side surface is convex at the near optical axis, and at least one surface of the object side surface and the image side surface is aspherical, and the object side surface and the image side surface are at least A surface has at least one inflection point; [6] wherein the focal length of the first lens is f1, the combined focal length of the second lens and the third lens is f23, and the following condition is satisfied: 0.4 < f1/f23 < 1.7. [7] When f1/f23 satisfies the above conditions, the wide-angle imaging lens group can significantly improve the resolution of the image while obtaining a wide angle of view (angle of view). [8] Preferably, the object side surface of the third lens has a concave surface at a near optical axis, and the image side surface has a convex surface at a near optical axis; and the object side surface of the fourth lens has a convex surface and an image side surface at a near optical axis The near optical axis is concave. [9] Preferably, the focal length of the first lens is f1, the focal length of the second lens is f2, and the following condition is satisfied: -0.9 < f1/f2 < -0.3. Thereby, the refractive power arrangement of the first lens and the second lens is suitable, which is advantageous for obtaining a wide angle of view (angle of view) and reducing excessive increase of system aberration. [10] Preferably, the focal length of the second lens is f2, the focal length of the third lens is f3, and the following condition is satisfied: -4.2 < f2/f3 < -1.3. Thereby, the arrangement of the refractive power of the second lens and the third lens is balanced, which contributes to the correction of the aberration and the reduction of the sensitivity. [11] Preferably, the focal length of the third lens is f3, the focal length of the fourth lens is f4, and the following condition is satisfied: -1.1 < f3/f4 < -0.4. Thereby, it is advantageous to ensure a positive and negative telephoto structure formed by the third lens and the fourth lens, which can effectively reduce the total optical length of the system. [12] Preferably, the focal length of the first lens is f1, the focal length of the third lens is f3, and the following condition is satisfied: 0.7 < f1/f3 < 2.1. Thereby, the positive refractive power of the first lens is effectively distributed, and the sensitivity of the wide-angle imaging lens group is reduced. [13] Preferably, the focal length of the second lens is f2, the focal length of the fourth lens is f4, and the following condition is satisfied: 0.55 < f2/f4 < 4.0. Therefore, the system's negative refractive power distribution is more suitable, which is beneficial to correct system aberrations to improve the imaging quality of the system. [14] Preferably, the combined focal length of the second lens and the third lens is f23, and the focal length of the fourth lens is f4, and the following condition is satisfied: -1.3 < f23/f4 < -0.6. Thereby, the wide-angle imaging lens group can significantly improve the resolution of the image while obtaining a wide angle of view (angle of view). [15] Preferably, the combined focal length of the first lens and the second lens is f12, and the combined focal length of the third lens and the fourth lens is f34, and the following condition is satisfied: 0.3 < f12/f34 < 2.2. Thereby, it is advantageous to obtain a wide angle of view (angle of view) and to effectively correct the curvature of field. [16] Preferably, the overall focal length of the wide-angle imaging lens group is f, the distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, and the following conditions are satisfied: 0.5 < f/TL < 0.8 . Thereby, it is advantageous to obtain a wide angle of view (angle of view) and to facilitate the miniaturization of the wide-angle imaging lens group to be mounted on a thin electronic product. [17] Preferably, the maximum angle of view of the wide-angle imaging lens group is FOV, and the following condition is satisfied: 75 < FOV < 95. Thereby, the wide-angle imaging lens set can have a suitable larger field of view. [18] Preferably, the thickness of the second lens on the optical axis is CT2, and the thickness of the first lens on the optical axis is CT1, and the following condition is satisfied: 0.2 < CT2 / CT1 < 0.7. Thereby, the first lens and the second lens have an appropriate thickness, which makes injection molding easier. [19] Preferably, the distance between the first lens and the second lens on the optical axis is T12, the thickness of the second lens on the optical axis is CT2, and the following condition is satisfied: 0.05 < T12/CT2 < 1.25 . Thereby, the maximum angle of view of the wide-angle imaging lens group can be further increased. [20] Preferably, the image side surface has a radius of curvature R2, and the second lens has an object side surface radius of curvature R3 and satisfies the following condition: 0.01 < R2/R3 < 4.3. Effectively reduce the spherical aberration and astigmatism of the wide-angle imaging lens group. Preferably, the first lens has a dispersion coefficient of V1, the second lens has a dispersion coefficient of V2, and satisfies the following condition: 30 < V1-V2<42. Thereby, the chromatic aberration of the wide-angle imaging lens group is effectively reduced. [22] The techniques, means, and other effects of the present invention in order to achieve the above objects are set forth in the accompanying drawings.
【24】 ＜第一實施例＞ 【25】 請參照圖1A及圖1B，其中圖1A繪示依照本發明第一實施例之廣角成像鏡片組的示意圖，圖1B由左至右依序為第一實施例的廣角成像鏡片組的球差、像散及歪曲曲線圖。由圖1A可知，廣角成像鏡片組係包含有一光圈100和一光學組，該光學組由物側至像側依序包含第一透鏡110、第二透鏡120、第三透鏡130、第四透鏡140、紅外線濾除濾光元件170、以及成像面180，其中該廣角成像鏡片組中具屈折力的透鏡為四片。該光圈100設置在該第一透鏡110的像側表面112與被攝物之間。 【26】 該第一透鏡110具有正屈折力，且為塑膠材質，其物側表面111近光軸190處為凸面，其像側表面112近光軸190處為凸面，且該物側表面111及像側表面112皆為非球面。 【27】 該第二透鏡120具有負屈折力，且為塑膠材質，其物側表面121近光軸190處為凹面，其像側表面122近光軸190處為凸面，且該物側表面121及像側表面122皆為非球面。 【28】 該第三透鏡130具有正屈折力，且為塑膠材質，其物側表面131近光軸190處為凹面，其像側表面132近光軸190處為凸面，且該物側表面131及像側表面132皆為非球面。 【29】 該第四透鏡140具有負屈折力，且為塑膠材質，其物側表面141近光軸190處為凸面，其像側表面142近光軸190處為凹面，且該物側表面141及像側表面142皆為非球面，且該物側表面141及該像側表面142至少一表面具有至少一反曲點。 【30】 該紅外線濾除濾光元件170為玻璃材質，其設置於該第四透鏡140及成像面180間且不影響該廣角成像鏡片組的焦距。 【31】 上述各透鏡的非球面的曲線方程式表示如下： 【32】
【33】 其中z為沿光軸190方向在高度為h的位置以表面頂點作參考的位置值；c是透鏡表面靠近光軸190的曲率，並為曲率半徑(R)的倒數(c=1/R)，R為透鏡表面靠近光軸190的曲率半徑，h是透鏡表面距離光軸190的垂直距離，k為圓錐係數（conic constant），而A、B、C、D、E、G、……為高階非球面係數。 【34】 第一實施例的廣角成像鏡片組中，廣角成像鏡片組的焦距為f，廣角成像鏡片組的光圈值(f-number)為Fno，廣角成像鏡片組中最大視場角(畫角)為FOV，其數值如下：f=1.978(公厘)；Fno= 2.0；以及FOV= 88(度)。 【35】 第一實施例的廣角成像鏡片組中，該第二透鏡120與第三透鏡130的合成焦距為f23，該第四透鏡140的焦距為f4，並滿足下列條件： f23/f4 = -1.0061。 【36】 第一實施例的廣角成像鏡片組中，該第一透鏡110的焦距為f1，該第二透鏡120的焦距為f2，並滿足下列條件： f1/f2 = -0.6443。 【37】 第一實施例的廣角成像鏡片組中，該第二透鏡120的焦距為f2，該第三透鏡130的焦距為f3，並滿足下列條件： f2/f3 = -2.2334。 【38】 第一實施例的廣角成像鏡片組中，該第三透鏡130的焦距為f3，該第四透鏡140的焦距為f4，並滿足下列條件： f3/f4 = -0.8555。 【39】 第一實施例的廣角成像鏡片組中，該第一透鏡110的焦距為f1，該第三透鏡130的焦距為f3，並滿足下列條件： f1/f3 = 1.4389。 【40】 第一實施例的廣角成像鏡片組中，該第二透鏡120的焦距為f2，該第四透鏡140的焦距為f4，並滿足下列條件： f2/f4 = 1.9107。 【41】 第一實施例的廣角成像鏡片組中，該第一透鏡110的焦距為f1，該第二透鏡120與第三透鏡130的合成焦距為f23，並滿足下列條件： f1/f23 = 1.2235。 【42】 第一實施例的廣角成像鏡片組中，該第一透鏡110與第二透鏡120的合成焦距為f12，該第三透鏡130與第四透鏡140的合成焦距為f34，並滿足下列條件： f12/f34 = 1.0944。 【43】 第一實施例的廣角成像鏡片組中，該廣角成像鏡片組的整體焦距為f，該第一透鏡110的物側表面111至成像面180於光軸190上的距離為TL，並滿足下列條件： f/TL = 0.6571。 【44】 第一實施例的廣角成像鏡片組中，該第二透鏡120於光軸180上的厚度為CT2，該第一透鏡110於光軸180上的厚度為CT1，並滿足下列條件： CT2/ CT1 = 0.3537。 【45】 第一實施例的廣角成像鏡片組中，該第一透鏡110與第二透鏡120於光軸190上的間隔距離為T12，該第二透鏡120於光軸190上的厚度為CT2，並滿足下列條件： T12/CT2 = 1.1152。 【46】 第一實施例的廣角成像鏡片組中，該第一透鏡110的像側表面112曲率半徑為R2，該第二透鏡120的物側表面121曲率半徑為R3，並滿足下列條件： R2/R3 = 2.8890。 【47】 第一實施例的廣角成像鏡片組中，該第一透鏡110的色散係數為V1，該第二透鏡120的色散係數為V2，並滿足下列條件： V1-V2 = 32.1。 【48】 再配合參照下列表1及表2。 【49】
【50】
【51】 表1為圖1A第一實施例詳細的結構數據，其中曲率半徑、厚度及焦距的單位為mm，且表面0-13依序表示由物側至像側的表面。表2為第一實施例中的非球面數據，其中，k表非球面曲線方程式中的錐面係數，A、B、C、D、E、F、G、……為高階非球面係數。此外，以下各實施例表格乃對應各實施例的示意圖與像差曲線圖，表格中數據的定義皆與第一實施例的表1、及表2的定義相同，在此不加贅述。 【52】 ＜第二實施例＞ 【53】 請參照圖2A及圖2B，其中圖2A繪示依照本發明第二實施例之廣角成像鏡片組的示意圖，圖2B由左至右依序為第二實施例的廣角成像鏡片組的球差、像散及歪曲曲線圖。由圖2A可知，廣角成像鏡片組係包含有一光圈200和一光學組，該光學組由物側至像側依序包含第一透鏡210、第二透鏡220、第三透鏡230、第四透鏡240、紅外線濾除濾光元件270、以及成像面280，其中該廣角成像鏡片組中具屈折力的透鏡為四片。該光圈200設置在該第一透鏡210的像側表面212與被攝物之間。 【54】 該第一透鏡210具有正屈折力，且為塑膠材質，其物側表面211近光軸290處為凸面，其像側表面212近光軸290處為凸面，且該物側表面211及像側表面212皆為非球面。 【55】 該第二透鏡220具有負屈折力，且為塑膠材質，其物側表面221近光軸290處為凹面，其像側表面222近光軸290處為凸面，且該物側表面221及像側表面222皆為非球面。 【56】 該第三透鏡230具有正屈折力，且為塑膠材質，其物側表面231近光軸290處為凹面，其像側表面232近光軸290處為凸面，且該物側表面231及像側表面232皆為非球面。 【57】 該第四透鏡240具有負屈折力，且為塑膠材質，其物側表面241近光軸290處為凸面，其像側表面242近光軸290處為凹面，且該物側表面241及像側表面242皆為非球面，且該物側表面241及該像側表面242至少一表面具有至少一反曲點。 【58】 該紅外線濾除濾光元件270為玻璃材質，其設置於該第四透鏡240及成像面280間且不影響該廣角成像鏡片組的焦距。 【59】 再配合參照下列表3、以及表4。 【60】
【61】
【62】 第二實施例中，非球面的曲線方程式表示如第一實施例的形式。此外，下表參數的定義皆與第一實施例相同，在此不加以贅述。 【63】 配合表3、以及表4可推算出下列數據： 【64】
【65】 ＜第三實施例＞ 【66】 請參照圖3A及圖3B，其中圖3A繪示依照本發明第三實施例之廣角成像鏡片組的示意圖，圖3B由左至右依序為第三實施例的廣角成像鏡片組的球差、像散及歪曲曲線圖。由圖3A可知，廣角成像鏡片組係包含有一光圈300和一光學組，該光學組由物側至像側依序包含第一透鏡310、第二透鏡320、第三透鏡330、第四透鏡340、紅外線濾除濾光元件370、以及成像面380，其中該廣角成像鏡片組中具屈折力的透鏡為四片。該光圈300設置在該第一透鏡310的像側表面312與被攝物之間。 【67】 該第一透鏡310具有正屈折力，且為塑膠材質，其物側表面311近光軸390處為凸面，其像側表面312近光軸390處為凸面，且該物側表面311及像側表面312皆為非球面。 【68】 該第二透鏡320具有負屈折力，且為塑膠材質，其物側表面321近光軸390處為凹面，其像側表面322近光軸390處為凸面，且該物側表面321及像側表面322皆為非球面。 【69】 該第三透鏡330具有正屈折力，且為塑膠材質，其物側表面331近光軸390處為凹面，其像側表面332近光軸390處為凸面，且該物側表面331及像側表面332皆為非球面。 【70】 該第四透鏡340具有負屈折力，且為塑膠材質，其物側表面341近光軸390處為凸面，其像側表面342近光軸390處為凹面，且該物側表面341及像側表面342皆為非球面，且該物側表面341及該像側表面342至少一表面具有至少一反曲點。 【71】 該紅外線濾除濾光元件370為玻璃材質，其設置於該第四透鏡340及成像面380間且不影響該廣角成像鏡片組的焦距。 【72】 再配合參照下列表5、以及表6。 【73】
【74】
【75】 第三實施例中，非球面的曲線方程式表示如第一實施例的形式。此外，下表參數的定義皆與第一實施例相同，在此不加以贅述。 【76】 配合表5、以及表6可推算出下列數據： 【77】
【78】 ＜第四實施例＞ 【79】 請參照圖4A及圖4B，其中圖4A繪示依照本發明第四實施例之廣角成像鏡片組的示意圖，圖4B由左至右依序為第四實施例的廣角成像鏡片組的球差、像散及歪曲曲線圖。由圖4A可知，廣角成像鏡片組係包含有一光圈400和一光學組，該光學組由物側至像側依序包含第一透鏡410、第二透鏡420、第三透鏡430、第四透鏡440、紅外線濾除濾光元件470、以及成像面480，其中該廣角成像鏡片組中具屈折力的透鏡為四片。該光圈400設置在該第一透鏡410的像側表面412與被攝物之間。 【80】 該第一透鏡410具有正屈折力，且為塑膠材質，其物側表面411近光軸490處為凸面，其像側表面412近光軸490處為凸面，且該物側表面411及像側表面412皆為非球面。 【81】 該第二透鏡420具有負屈折力，且為塑膠材質，其物側表面421近光軸490處為凹面，其像側表面422近光軸490處為凸面，且該物側表面421及像側表面422皆為非球面。 【82】 該第三透鏡430具有正屈折力，且為塑膠材質，其物側表面431近光軸490處為凹面，其像側表面432近光軸490處為凸面，且該物側表面431及像側表面432皆為非球面。 【83】 該第四透鏡440具有負屈折力，且為塑膠材質，其物側表面441近光軸490處為凸面，其像側表面442近光軸490處為凹面，且該物側表面441及像側表面442皆為非球面，且該物側表面441及該像側表面442至少一表面具有至少一反曲點。 【84】 該紅外線濾除濾光元件470為玻璃材質，其設置於該第四透鏡440及成像面480間且不影響該廣角成像鏡片組的焦距。 【85】 再配合參照下列表7、以及表8。 【86】
【87】
【88】 第四實施例中，非球面的曲線方程式表示如第一實施例的形式。此外，下表參數的定義皆與第一實施例相同，在此不加以贅述。 【89】 配合表7、以及表8可推算出下列數據： 【90】
【91】 ＜第五實施例＞ 【92】 請參照圖5A及圖5B，其中圖5A繪示依照本發明第五實施例之廣角成像鏡片組的示意圖，圖5B由左至右依序為第五實施例的廣角成像鏡片組的球差、像散及歪曲曲線圖。由圖5A可知，廣角成像鏡片組係包含有一光圈500和一光學組，該光學組由物側至像側依序包含第一透鏡510、第二透鏡520、第三透鏡530、第四透鏡540、紅外線濾除濾光元件570、以及成像面580，其中該廣角成像鏡片組中具屈折力的透鏡為四片。該光圈500設置在該第一透鏡510的像側表面512與被攝物之間。 【93】 該第一透鏡510具有正屈折力，且為塑膠材質，其物側表面511近光軸590處為凸面，其像側表面512近光軸590處為凸面，且該物側表面511及像側表面512皆為非球面。 【94】 該第二透鏡520具有負屈折力，且為塑膠材質，其物側表面521近光軸590處為凹面，其像側表面522近光軸590處為凹面，且該物側表面521及像側表面522皆為非球面。 【95】 該第三透鏡530具有正屈折力，且為塑膠材質，其物側表面531近光軸590處為凹面，其像側表面532近光軸590處為凸面，且該物側表面531及像側表面532皆為非球面。 【96】 該第四透鏡540具有負屈折力，且為塑膠材質，其物側表面541近光軸590處為凸面，其像側表面542近光軸590處為凹面，且該物側表面541及像側表面542皆為非球面，且該物側表面541及該像側表面542至少一表面具有至少一反曲點。 【97】 該紅外線濾除濾光元件570為玻璃材質，其設置於該第四透鏡540及成像面580間且不影響該廣角成像鏡片組的焦距。 【98】 再配合參照下列表9、以及表10。 【99】
【100】
【101】 第五實施例中，非球面的曲線方程式表示如第一實施例的形式。此外，下表參數的定義皆與第一實施例相同，在此不加以贅述。 【102】 配合表9、以及表10可推算出下列數據： 【103】
【104】 ＜第六實施例＞ 【105】 請參照圖6A及圖6B，其中圖6A繪示依照本發明第六實施例之廣角成像鏡片組的示意圖，圖6B由左至右依序為第六實施例的廣角成像鏡片組的球差、像散及歪曲曲線圖。由圖6A可知，廣角成像鏡片組係包含有一光圈600和一光學組，該光學組由物側至像側依序包含第一透鏡610、第二透鏡620、第三透鏡630、第四透鏡640、紅外線濾除濾光元件670、以及成像面680，其中該廣角成像鏡片組中具屈折力的透鏡為四片。該光圈600設置在該第一透鏡610的像側表面612與被攝物之間。 【106】 該第一透鏡610具有正屈折力，且為塑膠材質，其物側表面611近光軸690處為凸面，其像側表面612近光軸690處為凸面，且該物側表面611及像側表面612皆為非球面。 【107】 該第二透鏡620具有負屈折力，且為塑膠材質，其物側表面621近光軸690處為凹面，其像側表面622近光軸690處為凹面，且該物側表面621及像側表面622皆為非球面。 【108】 該第三透鏡630具有正屈折力，且為塑膠材質，其物側表面631近光軸690處為凹面，其像側表面632近光軸690處為凸面，且該物側表面631及像側表面632皆為非球面。 【109】 該第四透鏡640具有負屈折力，且為塑膠材質，其物側表面641近光軸690處為凸面，其像側表面642近光軸690處為凹面，且該物側表面641及像側表面642皆為非球面，且該物側表面641及該像側表面642至少一表面具有至少一反曲點。 【110】 該紅外線濾除濾光元件670為玻璃材質，其設置於該第四透鏡640及成像面680間且不影響該廣角成像鏡片組的焦距。 【111】 再配合參照下列表11、以及表12。 【112】
【113】
【114】 第六實施例中，非球面的曲線方程式表示如第一實施例的形式。此外，下表參數的定義皆與第一實施例相同，在此不加以贅述。 【115】 配合表11、以及表12可推算出下列數據： 【116】
【117】 ＜第七實施例＞ 【118】 請參照圖7A及圖7B，其中圖7A繪示依照本發明第七實施例之廣角成像鏡片組的示意圖，圖7B由左至右依序為第七實施例的廣角成像鏡片組的球差、像散及歪曲曲線圖。由圖7A可知，廣角成像鏡片組係包含有一光圈700和一光學組，該光學組由物側至像側依序包含第一透鏡710、第二透鏡720、第三透鏡730、第四透鏡740、紅外線濾除濾光元件770、以及成像面780，其中該廣角成像鏡片組中具屈折力的透鏡為四片。該光圈700設置在該第一透鏡710的像側表面712與被攝物之間。 【119】 該第一透鏡710具有正屈折力，且為塑膠材質，其物側表面711近光軸790處為凸面，其像側表面712近光軸790處為凸面，且該物側表面711及像側表面712皆為非球面。 【120】 該第二透鏡720具有負屈折力，且為塑膠材質，其物側表面721近光軸790處為凹面，其像側表面722近光軸790處為凹面，且該物側表面721及像側表面722皆為非球面。 【121】 該第三透鏡730具有正屈折力，且為塑膠材質，其物側表面731近光軸790處為凹面，其像側表面732近光軸790處為凸面，且該物側表面731及像側表面732皆為非球面。 【122】 該第四透鏡740具有負屈折力，且為塑膠材質，其物側表面741近光軸790處為凸面，其像側表面742近光軸790處為凹面，且該物側表面741及像側表面742皆為非球面，且該物側表面741及該像側表面742至少一表面具有至少一反曲點。 【123】 該紅外線濾除濾光元件770為玻璃材質，其設置於該第四透鏡740及成像面780間且不影響該廣角成像鏡片組的焦距。 【124】 再配合參照下列表13、以及表14。 【125】
【126】
【127】 第七實施例中，非球面的曲線方程式表示如第一實施例的形式。此外，下表參數的定義皆與第一實施例相同，在此不加以贅述。 【128】 配合表13、以及表14可推算出下列數據： 【129】
【130】 ＜第八實施例＞ 【131】 請參照圖8A及圖8B，其中圖8A繪示依照本發明第八實施例之廣角成像鏡片組的示意圖，圖8B由左至右依序為第八實施例的廣角成像鏡片組的球差、像散及歪曲曲線圖。由圖8A可知，廣角成像鏡片組係包含有一光圈800和一光學組，該光學組由物側至像側依序包含第一透鏡810、第二透鏡820、第三透鏡830、第四透鏡840、紅外線濾除濾光元件870、以及成像面880，其中該廣角成像鏡片組中具屈折力的透鏡為四片。該光圈800設置在該第一透鏡810的像側表面812與被攝物之間。 【132】 該第一透鏡810具有正屈折力，且為塑膠材質，其物側表面811近光軸890處為凸面，其像側表面812近光軸890處為凸面，且該物側表面811及像側表面812皆為非球面。 【133】 該第二透鏡820具有負屈折力，且為塑膠材質，其物側表面821近光軸890處為凹面，其像側表面822近光軸890處為凹面，且該物側表面821及像側表面822皆為非球面。 【134】 該第三透鏡830具有正屈折力，且為塑膠材質，其物側表面831近光軸890處為凹面，其像側表面832近光軸890處為凸面，且該物側表面831及像側表面832皆為非球面。 【135】 該第四透鏡840具有負屈折力，且為塑膠材質，其物側表面841近光軸890處為凸面，其像側表面842近光軸890處為凹面，且該物側表面841及像側表面842皆為非球面，且該物側表面841及該像側表面842至少一表面具有至少一反曲點。 【136】 該紅外線濾除濾光元件870為玻璃材質，其設置於該第四透鏡840及成像面880間且不影響該廣角成像鏡片組的焦距。 【137】 再配合參照下列表15、以及表16。 【138】
【139】
【140】 第八實施例中，非球面的曲線方程式表示如第一實施例的形式。此外，下表參數的定義皆與第一實施例相同，在此不加以贅述。 【141】 配合表15、以及表16可推算出下列數據： 【142】
【143】 本發明提供的廣角成像鏡片組，透鏡的材質可為塑膠或玻璃，當透鏡材質為塑膠，可以有效降低生產成本，另當透鏡的材質為玻璃，則可以增加廣角成像鏡片組屈折力配置的自由度。此外，廣角成像鏡片組中透鏡的物側表面及像側表面可為非球面，非球面可以容易製作成球面以外的形狀，獲得較多的控制變數，用以消減像差，進而縮減透鏡使用的數目，因此可以有效降低本發明廣角成像鏡片組的總長度。 【144】 本發明提供的廣角成像鏡片組中，就以具有屈折力的透鏡而言，若透鏡表面係為凸面且未界定該凸面位置時，則表示該透鏡表面於近光軸處為凸面；若透鏡表面係為凹面且未界定該凹面位置時，則表示該透鏡表面於近光軸處為凹面。 【145】 本發明提供的廣角成像鏡片組更可視需求應用於移動對焦的光學系統中，並兼具優良像差修正與良好成像品質的特色，可多方面應用於3D(三維)影像擷取、數位相機、行動裝置、數位平板或車用攝影等電子影像系統中。 【146】 綜上所述，上述各實施例及圖式僅為本發明的較佳實施例而已，當不能以之限定本發明實施之範圍，即大凡依本發明申請專利範圍所作的均等變化與修飾，皆應屬本發明專利涵蓋的範圍內。[First Embodiment] [25] Referring to FIG. 1A and FIG. 1B, FIG. 1A is a schematic diagram of a wide-angle imaging lens group according to a first embodiment of the present invention, and FIG. 1B is sequentially from left to right. A spherical aberration, astigmatism, and distortion curve of a wide-angle imaging lens set of an embodiment. As can be seen from FIG. 1A, the wide-angle imaging lens assembly includes an aperture 100 and an optical group including the first lens 110, the second lens 120, the third lens 130, and the fourth lens 140 from the object side to the image side. The infrared filter element 170 and the imaging surface 180 are four lenses having a refractive power in the wide-angle imaging lens group. The aperture 100 is disposed between the image side surface 112 of the first lens 110 and the subject. [26] The first lens 110 has a positive refractive power and is made of a plastic material. The object side surface 111 is convex at the near optical axis 190, and the image side surface 112 is convex at the near optical axis 190, and the object side surface 111 is The image side surface 112 is aspherical. [27] The second lens 120 has a negative refractive power and is made of a plastic material. The object side surface 121 is concave at the near optical axis 190, and the image side surface 122 is convex at the near optical axis 190, and the object side surface 121 The image side surface 122 is aspherical. [28] The third lens 130 has a positive refractive power and is made of a plastic material. The object side surface 131 is concave at the near optical axis 190, and the image side surface 132 is convex at the near optical axis 190, and the object side surface 131 The image side surface 132 is aspherical. The fourth lens 140 has a negative refractive power and is made of a plastic material. The object side surface 141 is convex at the near optical axis 190, and the image side surface 142 is concave at the near optical axis 190, and the object side surface 141 The image side surface 142 is aspherical, and at least one surface of the object side surface 141 and the image side surface 142 has at least one inflection point. [30] The infrared filter element 170 is made of glass and disposed between the fourth lens 140 and the imaging surface 180 without affecting the focal length of the wide-angle imaging lens group. [31] The aspherical curve equations of the above lenses are expressed as follows: [32] [33] where z is a position value with reference to the surface apex at a position of height h in the direction of the optical axis 190; c is the curvature of the lens surface near the optical axis 190, and is the reciprocal of the radius of curvature (R) (c=1) /R), R is the radius of curvature of the lens surface near the optical axis 190, h is the vertical distance of the lens surface from the optical axis 190, k is a conic constant, and A, B, C, D, E, G, ... is a high-order aspheric coefficient. [34] In the wide-angle imaging lens group of the first embodiment, the focal length of the wide-angle imaging lens group is f, the aperture value (f-number) of the wide-angle imaging lens group is Fno, and the maximum angle of view in the wide-angle imaging lens group (arrow angle) For FOV, the values are as follows: f = 1.978 (mm); Fno = 2.0; and FOV = 88 (degrees). [35] In the wide-angle imaging lens group of the first embodiment, the composite focal length of the second lens 120 and the third lens 130 is f23, and the focal length of the fourth lens 140 is f4, and the following conditions are satisfied: f23/f4 = - 1.0061. [36] In the wide-angle imaging lens group of the first embodiment, the focal length of the first lens 110 is f1, the focal length of the second lens 120 is f2, and the following condition is satisfied: f1/f2 = -0.6443. [37] In the wide-angle imaging lens group of the first embodiment, the focal length of the second lens 120 is f2, the focal length of the third lens 130 is f3, and the following condition is satisfied: f2/f3 = -2.2334. In the wide-angle imaging lens group of the first embodiment, the focal length of the third lens 130 is f3, the focal length of the fourth lens 140 is f4, and the following condition is satisfied: f3/f4 = -0.8555. In the wide-angle imaging lens group of the first embodiment, the focal length of the first lens 110 is f1, the focal length of the third lens 130 is f3, and the following condition is satisfied: f1/f3 = 1.4389. [40] In the wide-angle imaging lens group of the first embodiment, the focal length of the second lens 120 is f2, the focal length of the fourth lens 140 is f4, and the following condition is satisfied: f2/f4 = 1.9107. In the wide-angle imaging lens group of the first embodiment, the focal length of the first lens 110 is f1, the combined focal length of the second lens 120 and the third lens 130 is f23, and the following conditions are satisfied: f1/f23 = 1.2235 . [42] In the wide-angle imaging lens group of the first embodiment, the composite focal length of the first lens 110 and the second lens 120 is f12, and the combined focal length of the third lens 130 and the fourth lens 140 is f34, and the following conditions are met. : f12/f34 = 1.0944. [43] In the wide-angle imaging lens group of the first embodiment, the overall focal length of the wide-angle imaging lens group is f, and the distance from the object-side surface 111 to the imaging surface 180 of the first lens 110 on the optical axis 190 is TL, and The following conditions are met: f/TL = 0.6571. [44] In the wide-angle imaging lens group of the first embodiment, the thickness of the second lens 120 on the optical axis 180 is CT2, and the thickness of the first lens 110 on the optical axis 180 is CT1, and the following conditions are satisfied: CT2 / CT1 = 0.3537. [45] In the wide-angle imaging lens group of the first embodiment, the distance between the first lens 110 and the second lens 120 on the optical axis 190 is T12, and the thickness of the second lens 120 on the optical axis 190 is CT2. The following conditions are met: T12/CT2 = 1.1152. In the wide-angle imaging lens group of the first embodiment, the image side surface 112 of the first lens 110 has a radius of curvature R2, and the object side surface 121 of the second lens 120 has a radius of curvature of R3, and satisfies the following conditions: R2 /R3 = 2.8890. In the wide-angle imaging lens group of the first embodiment, the first lens 110 has a dispersion coefficient of V1, and the second lens 120 has a dispersion coefficient of V2 and satisfies the following condition: V1-V2 = 32.1. [48] Refer to Table 1 and Table 2 below for reference. [49] [50] Table 1 is the detailed structural data of the first embodiment of Fig. 1A, in which the unit of curvature radius, thickness and focal length is mm, and the surface 0-13 sequentially represents the surface from the object side to the image side. Table 2 is the aspherical data in the first embodiment, wherein the cone coefficients in the a-spherical curve equation of k, A, B, C, D, E, F, G, ... are high-order aspheric coefficients. In addition, the table of the following embodiments corresponds to the schematic diagram and the aberration diagram of each embodiment, and the definition of the data in the table is the same as the definitions of Table 1 and Table 2 of the first embodiment, and details are not described herein. [2] <Second Embodiment> [53] Please refer to FIG. 2A and FIG. 2B, wherein FIG. 2A is a schematic diagram of a wide-angle imaging lens group according to a second embodiment of the present invention, and FIG. 2B is sequentially from left to right. The spherical aberration, astigmatism, and distortion curves of the wide-angle imaging lens set of the second embodiment. As can be seen from FIG. 2A, the wide-angle imaging lens assembly includes an aperture 200 and an optical group. The optical group sequentially includes a first lens 210, a second lens 220, a third lens 230, and a fourth lens 240 from the object side to the image side. The infrared filter element 270 and the imaging surface 280, wherein the lens of the wide-angle imaging lens group has four refractive powers. The aperture 200 is disposed between the image side surface 212 of the first lens 210 and the object. The first lens 210 has a positive refractive power and is made of a plastic material. The object side surface 211 is convex at the near optical axis 290, and the image side surface 212 is convex at the near optical axis 290, and the object side surface 211 The image side surface 212 is aspherical. [55] The second lens 220 has a negative refractive power and is made of a plastic material. The object side surface 221 is concave at the near optical axis 290, and the image side surface 222 is convex at the near optical axis 290, and the object side surface 221 The image side surface 222 is aspherical. The third lens 230 has a positive refractive power and is made of a plastic material. The object side surface 231 is concave at the near optical axis 290, and the image side surface 232 is convex at the near optical axis 290, and the object side surface 231 is 231. The image side surface 232 is aspherical. The fourth lens 240 has a negative refractive power and is made of a plastic material. The object side surface 241 is convex at the near optical axis 290, and the image side surface 242 is concave at the near optical axis 290, and the object side surface 241 The image side surface 242 is aspherical, and the object side surface 241 and the image side surface 242 have at least one surface having at least one inflection point. The infrared filter element 270 is made of glass and disposed between the fourth lens 240 and the imaging surface 280 without affecting the focal length of the wide-angle imaging lens group. [59] Refer to Table 3 and Table 4 below. [60] [61] In the second embodiment, the aspherical curve equation represents the form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and are not described herein. [63] The following data can be derived in conjunction with Table 3 and Table 4: [64] [35] <Third Embodiment> [66] Please refer to FIG. 3A and FIG. 3B, wherein FIG. 3A is a schematic diagram of a wide-angle imaging lens group according to a third embodiment of the present invention, and FIG. 3B is sequentially from left to right. The spherical aberration, astigmatism, and distortion curves of the wide-angle imaging lens set of the three embodiments. As can be seen from FIG. 3A, the wide-angle imaging lens assembly includes an aperture 300 and an optical group. The optical group includes a first lens 310, a second lens 320, a third lens 330, and a fourth lens 340 from the object side to the image side. The infrared filter element 370 and the imaging surface 380, wherein the lens of the wide-angle imaging lens group has four refractive powers. The aperture 300 is disposed between the image side surface 312 of the first lens 310 and the subject. [67] The first lens 310 has a positive refractive power and is made of a plastic material. The object side surface 311 is convex at the near optical axis 390, and the image side surface 312 is convex at the near optical axis 390, and the object side surface 311 The image side surface 312 is aspherical. The second lens 320 has a negative refractive power and is made of a plastic material. The object side surface 321 is concave at the near optical axis 390, and the image side surface 322 is convex at the near optical axis 390, and the object side surface 321 The image side surface 322 is aspherical. The third lens 330 has a positive refractive power and is made of a plastic material. The object side surface 331 has a concave surface at the near optical axis 390, and the image side surface 332 has a convex surface at the near optical axis 390, and the object side surface 331 The image side surface 332 is aspherical. The fourth lens 340 has a negative refractive power and is made of a plastic material. The object side surface 341 is convex at the near optical axis 390, and the image side surface 342 is concave at the near optical axis 390, and the object side surface 341 The image side surface 342 is aspherical, and the object side surface 341 and the image side surface 342 have at least one surface having at least one inflection point. [71] The infrared filter element 370 is made of glass and disposed between the fourth lens 340 and the imaging surface 380 without affecting the focal length of the wide-angle imaging lens group. [72] Refer to Table 5 and Table 6 below. [73] [74] In the third embodiment, the aspherical curve equation represents the form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and are not described herein. [76] The following data can be derived in conjunction with Table 5 and Table 6: [77] [4] <Fourth Embodiment> [79] Please refer to FIG. 4A and FIG. 4B, wherein FIG. 4A is a schematic diagram of a wide-angle imaging lens group according to a fourth embodiment of the present invention, and FIG. 4B is sequentially from left to right. The spherical aberration, astigmatism, and distortion curves of the wide-angle imaging lens set of the four embodiments. As can be seen from FIG. 4A, the wide-angle imaging lens assembly includes an aperture 400 and an optical group. The optical group includes a first lens 410, a second lens 420, a third lens 430, and a fourth lens 440 from the object side to the image side. The infrared filter element 470 and the imaging surface 480, wherein the lens of the wide-angle imaging lens group has four refractive powers. The aperture 400 is disposed between the image side surface 412 of the first lens 410 and the object. The first lens 410 has a positive refractive power and is made of a plastic material. The object side surface 411 is convex at the near optical axis 490, and the image side surface 412 is convex at the near optical axis 490, and the object side surface 411 The image side surface 412 is aspherical. The second lens 420 has a negative refractive power and is made of a plastic material. The object side surface 421 is concave at the near optical axis 490, and the image side surface 422 is convex at the near optical axis 490, and the object side surface 421 The image side surface 422 is aspherical. The third lens 430 has a positive refractive power and is made of a plastic material. The object side surface 431 is concave at the near optical axis 490, and the image side surface 432 is convex at the near optical axis 490, and the object side surface 431 is convex. The image side surface 432 is aspherical. The fourth lens 440 has a negative refractive power and is made of a plastic material. The object side surface 441 is convex at the near optical axis 490, and the image side surface 442 is concave at the near optical axis 490, and the object side surface 441 The image side surface 442 is aspherical, and the object side surface 441 and the image side surface 442 have at least one surface having at least one inflection point. The infrared filter element 470 is made of glass and disposed between the fourth lens 440 and the imaging surface 480 without affecting the focal length of the wide-angle imaging lens group. [85] Refer to Table 7 and Table 8 below for reference. [86] [87] In the fourth embodiment, the aspherical curve equation represents the form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and are not described herein. [89] The following data can be derived in conjunction with Table 7 and Table 8: [90] [9] <Fifth Embodiment> [92] Please refer to FIG. 5A and FIG. 5B, wherein FIG. 5A is a schematic diagram of a wide-angle imaging lens group according to a fifth embodiment of the present invention, and FIG. 5B is sequentially from left to right. The spherical aberration, astigmatism, and distortion curves of the wide-angle imaging lens set of the fifth embodiment. As can be seen from FIG. 5A, the wide-angle imaging lens assembly includes an aperture 500 and an optical group. The optical group sequentially includes a first lens 510, a second lens 520, a third lens 530, and a fourth lens 540 from the object side to the image side. The infrared filter element 570 and the imaging surface 580, wherein the lens of the wide-angle imaging lens group has four refractive powers. The aperture 500 is disposed between the image side surface 512 of the first lens 510 and the subject. The first lens 510 has a positive refractive power and is made of a plastic material. The object side surface 511 is convex at the near optical axis 590, and the image side surface 512 is convex at the near optical axis 590, and the object side surface 511 is provided. The image side surface 512 is aspherical. The second lens 520 has a negative refractive power and is made of a plastic material. The object side surface 521 is concave at the near optical axis 590, and the image side surface 522 is concave at the near optical axis 590, and the object side surface 521 is 521. The image side surface 522 is aspherical. The third lens 530 has a positive refractive power and is made of a plastic material. The object side surface 531 is concave at the near optical axis 590, and the image side surface 532 is convex at the near optical axis 590, and the object side surface 531 is convex. The image side surface 532 is aspherical. The fourth lens 540 has a negative refractive power and is made of a plastic material. The object side surface 541 is convex at the near optical axis 590, and the image side surface 542 is concave at the near optical axis 590, and the object side surface 541 is concave. The image side surface 542 is aspherical, and the object side surface 541 and the image side surface 542 have at least one surface having at least one inflection point. The infrared filter element 570 is made of glass and disposed between the fourth lens 540 and the imaging surface 580 without affecting the focal length of the wide-angle imaging lens group. [98] Refer to Table 9 and Table 10 below. [99] [100] In the fifth embodiment, the aspherical curve equation represents the form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and are not described herein. [102] The following data can be derived in conjunction with Table 9 and Table 10: [103] [6] <Sixth embodiment> [105] Please refer to FIG. 6A and FIG. 6B, wherein FIG. 6A is a schematic diagram of a wide-angle imaging lens group according to a sixth embodiment of the present invention, and FIG. 6B is sequentially from left to right. The spherical aberration, astigmatism, and distortion curves of the wide-angle imaging lens set of the six embodiments. As can be seen from FIG. 6A, the wide-angle imaging lens assembly includes an aperture 600 and an optical group. The optical group includes a first lens 610, a second lens 620, a third lens 630, and a fourth lens 640 from the object side to the image side. The infrared filter element 670 and the imaging surface 680, wherein the lens of the wide-angle imaging lens group has four refractive powers. The aperture 600 is disposed between the image side surface 612 of the first lens 610 and the object. The first lens 610 has a positive refractive power and is made of a plastic material. The object side surface 611 is convex at the near optical axis 690, and the image side surface 612 is convex at the near optical axis 690, and the object side surface 611 is 611. The image side surface 612 is aspherical. The second lens 620 has a negative refractive power and is made of a plastic material. The object side surface 621 is concave at the near optical axis 690, and the image side surface 622 is concave at the near optical axis 690, and the object side surface 621 The image side surface 622 is aspherical. The third lens 630 has a positive refractive power and is made of a plastic material. The object side surface 631 is concave at the near optical axis 690, and the image side surface 632 is convex at the near optical axis 690, and the object side surface 631 is convex. And the image side surface 632 is aspherical. The fourth lens 640 has a negative refractive power and is made of a plastic material. The object side surface 641 is convex at the near optical axis 690, and the image side surface 642 is concave at the near optical axis 690, and the object side surface 641 The image side surface 642 is aspherical, and the object side surface 641 and the image side surface 642 have at least one surface having at least one inflection point. The infrared filter element 670 is made of glass and disposed between the fourth lens 640 and the imaging surface 680 without affecting the focal length of the wide-angle imaging lens group. [111] Refer to Table 11 and Table 12 below. [112] 【113】 In the sixth embodiment, the aspherical curve equation represents the form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and are not described herein. [115] The following data can be derived from Table 11 and Table 12: [116] [117] <Seventh Embodiment> [118] Please refer to FIG. 7A and FIG. 7B, wherein FIG. 7A is a schematic diagram of a wide-angle imaging lens group according to a seventh embodiment of the present invention, and FIG. 7B is sequentially from left to right. The spherical aberration, astigmatism, and distortion curves of the wide-angle imaging lens set of the seven embodiments. As can be seen from FIG. 7A, the wide-angle imaging lens assembly includes an aperture 700 and an optical group. The optical group includes a first lens 710, a second lens 720, a third lens 730, and a fourth lens 740 from the object side to the image side. The infrared filter element 770 and the imaging surface 780, wherein the lens of the wide-angle imaging lens group has four refractive powers. The aperture 700 is disposed between the image side surface 712 of the first lens 710 and the subject. The first lens 710 has a positive refractive power and is made of a plastic material. The object side surface 711 is convex at the near optical axis 790, and the image side surface 712 is convex at the near optical axis 790, and the object side surface 711 The image side surface 712 is aspherical. [120] The second lens 720 has a negative refractive power and is made of a plastic material. The object side surface 721 is concave at the near optical axis 790, and the image side surface 722 is concave at the near optical axis 790, and the object side surface 721 The image side surface 722 is aspherical. The third lens 730 has a positive refractive power and is made of a plastic material. The object side surface 731 is concave at the near optical axis 790, and the image side surface 732 is convex at the near optical axis 790, and the object side surface 731 is convex. The image side surface 732 is aspherical. The fourth lens 740 has a negative refractive power and is made of a plastic material. The object side surface 741 is convex at the near optical axis 790, and the image side surface 742 is concave at the near optical axis 790, and the object side surface 741 The image side surface 742 is aspherical, and the object side surface 741 and the image side surface 742 have at least one surface having at least one inflection point. The infrared filter element 770 is made of glass and disposed between the fourth lens 740 and the imaging surface 780 without affecting the focal length of the wide-angle imaging lens group. [124] Refer to Table 13 and Table 14 below. [125] 【126】 In the seventh embodiment, the aspherical curve equation represents the form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and are not described herein. [128] The following data can be derived from Table 13 and Table 14: [129] [Embodiment 8] [131] Please refer to FIG. 8A and FIG. 8B, wherein FIG. 8A is a schematic diagram of a wide-angle imaging lens group according to an eighth embodiment of the present invention, and FIG. 8B is sequentially from left to right. The spherical aberration, astigmatism, and distortion curves of the wide-angle imaging lens set of the eight embodiments. As can be seen from FIG. 8A, the wide-angle imaging lens assembly includes an aperture 800 and an optical group. The optical group includes a first lens 810, a second lens 820, a third lens 830, and a fourth lens 840 from the object side to the image side. The infrared filter element 870 and the imaging surface 880, wherein the lens having a refractive power in the wide-angle imaging lens group is four. The aperture 800 is disposed between the image side surface 812 of the first lens 810 and the subject. The first lens 810 has a positive refractive power and is made of a plastic material. The object side surface 811 is convex at the near optical axis 890, and the image side surface 812 is convex at the near optical axis 890, and the object side surface 811 is 811. The image side surface 812 is aspherical. The second lens 820 has a negative refractive power and is made of a plastic material. The object side surface 821 is concave at the near optical axis 890, and the image side surface 822 is concave at the near optical axis 890, and the object side surface 821 The image side surface 822 is aspherical. The third lens 830 has a positive refractive power and is made of a plastic material. The object side surface 831 is concave at the near optical axis 890, and the image side surface 832 is convex at the near optical axis 890, and the object side surface 831 The image side surface 832 is aspherical. The fourth lens 840 has a negative refractive power and is made of a plastic material. The object side surface 841 is convex at the near optical axis 890, and the image side surface 842 is concave at the near optical axis 890, and the object side surface 841 The image side surface 842 is aspherical, and the object side surface 841 and the image side surface 842 have at least one surface having at least one inflection point. The infrared filter element 870 is made of glass and disposed between the fourth lens 840 and the imaging surface 880 without affecting the focal length of the wide-angle imaging lens group. [137] Refer to Table 15 and Table 16 below for further reference. 【138】 【139】 In the eighth embodiment, the aspherical curve equation represents the form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and are not described herein. [141] The following data can be derived in conjunction with Table 15 and Table 16: [142] [143] The wide-angle imaging lens set provided by the invention can be made of plastic or glass. When the lens material is plastic, the production cost can be effectively reduced. When the lens is made of glass, the refractive power of the wide-angle imaging lens group can be increased. The degree of freedom of configuration. In addition, the object side surface and the image side surface of the lens in the wide-angle imaging lens group may be aspherical, and the aspheric surface can be easily formed into a shape other than the spherical surface, and more control variables are obtained to reduce the aberration and thereby reduce the use of the lens. The number can therefore effectively reduce the overall length of the wide-angle imaging lens set of the present invention. [144] In the wide-angle imaging lens set provided by the present invention, in the case of a lens having a refractive power, if the lens surface is convex and the convex position is not defined, it indicates that the lens surface is convex at the near optical axis; If the lens surface is concave and the concave position is not defined, it indicates that the lens surface is concave at the low beam axis. [145] The wide-angle imaging lens set provided by the present invention is more suitable for use in a moving focus optical system, and has the characteristics of excellent aberration correction and good imaging quality, and can be applied to 3D (three-dimensional) image capture in various aspects. In electronic imaging systems such as digital cameras, mobile devices, digital tablets or car photography. In the above, the above embodiments and drawings are only the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, that is, the average variation of the scope of the patent application of the present invention is Modifications are all within the scope of the invention.
【147】
100、200、300、400、500、600、700、800‧‧‧光圈
110、210、310、410、510、610、710、810‧‧‧第一透鏡
111、211、311、411、511、611、711、811‧‧‧物側表面
112、212、312、412、512、612、712、812‧‧‧像側表面
120、220、320、420、520、620、720、820‧‧‧第二透鏡
121、221、321、421、521、621、721、821‧‧‧物側表面
122、222、322、422、522、622、722、822‧‧‧像側表面
130、230、330、430、530、630、730、830‧‧‧第三透鏡
131、231、331、431、531、631、731、831‧‧‧物側表面
132、232、332、432、532、632、732、832‧‧‧像側表面
140、240、340、440、540、640、740、840‧‧‧第四透鏡
141、241、341、441、541、641、741、841‧‧‧物側表面
142、242、342、442、542、642、742、842‧‧‧像側表面
170、270、370、470、570、670、770、870‧‧‧紅外線濾除濾光元件
180、280、380、480、580、680、780、880‧‧‧成像面
190、290、390、490、590、690、790、890‧‧‧光軸
f‧‧‧廣角成像鏡片組的焦距
Fno‧‧‧廣角成像鏡片組的光圈值
FOV‧‧‧廣角成像鏡片組中最大視場角
f1‧‧‧第一透鏡的焦距
f2‧‧‧第二透鏡的焦距
f3‧‧‧第三透鏡的焦距
f4‧‧‧第四透鏡的焦距
f12‧‧‧第一透鏡與第二透鏡的合成焦距
f23‧‧‧第二透鏡與第三透鏡的合成焦距
f34‧‧‧第三透鏡與第四透鏡的合成焦距
R2‧‧‧第一透鏡的像側表面曲率半徑
R3‧‧‧第二透鏡的物側表面曲率半徑
V1‧‧‧第一透鏡的色散係數
V2‧‧‧第二透鏡的色散係數
CT1‧‧‧第一透鏡於光軸上的厚度
CT2‧‧‧第二透鏡於光軸上的厚度
T12‧‧‧第一透鏡與第二透鏡於光軸上的間隔距離
TL‧‧‧第一透鏡的物側表面至成像面於光軸上的距離【147】
100, 200, 300, 400, 500, 600, 700, 800‧ ‧ aperture
110, 210, 310, 410, 510, 610, 710, 810 ‧ ‧ first lens
111, 211, 311, 411, 511, 611, 711, 811 ‧ ‧ ‧ side surface
112, 212, 312, 412, 512, 612, 712, 812‧‧‧ image side surface
120, 220, 320, 420, 520, 620, 720, 820‧‧‧ second lens
121, 221, 321, 421, 521, 621, 721, 821‧‧ ‧ side surfaces
122, 222, 322, 422, 522, 622, 722, 822 ‧ ‧ side surface
130, 230, 330, 430, 530, 630, 730, 830 ‧ ‧ third lens
131, 231, 331, 431, 531, 631, 731, 831 ‧ ‧ ‧ side surface
132, 232, 332, 432, 532, 632, 732, 832‧‧‧ side surface
140, 240, 340, 440, 540, 640, 740, 840 ‧ ‧ fourth lens
141, 241, 341, 441, 541, 641, 741, 841‧‧‧ ‧ side surfaces
142, 242, 342, 442, 542, 642, 742, 842 ‧ ‧ side surface
170, 270, 370, 470, 570, 670, 770, 870 ‧ ‧ infrared filter components
180, 280, 380, 480, 580, 680, 780, 880 ‧ ‧ imaging surface
190, 290, 390, 490, 590, 690, 790, 890‧‧‧ optical axis
f‧‧‧Focus of the wide-angle imaging lens set
Aperture value of Fno‧‧‧ wide-angle imaging lens set
Maximum field of view in the FOV‧‧‧ wide-angle imaging lens set
F1‧‧‧The focal length of the first lens
F2‧‧‧The focal length of the second lens
f3‧‧‧The focal length of the third lens
F4‧‧‧The focal length of the fourth lens
F12‧‧‧Combined focal length of the first lens and the second lens
F23‧‧‧Combined focal length of the second lens and the third lens
F34‧‧‧Combined focal length of the third lens and the fourth lens
R2‧‧‧ Image side surface radius of curvature of the first lens
R3‧‧‧ radius of curvature of the object side surface of the second lens
V1‧‧‧Dispersion coefficient of the first lens
V2‧‧‧Dispersion coefficient of the second lens
CT1‧‧‧ thickness of the first lens on the optical axis
CT2‧‧‧ thickness of the second lens on the optical axis
T12‧‧‧The distance between the first lens and the second lens on the optical axis
TL‧‧‧The distance from the object side surface of the first lens to the imaging surface on the optical axis
【23】 圖1A係本發明第一實施例之廣角成像鏡片組的示意圖。 圖1B由左至右依序為第一實施例的廣角成像鏡片組的球差、像散及歪曲曲線圖。 圖2A係本發明第二實施例之廣角成像鏡片組的示意圖。 圖2B由左至右依序為第二實施例的廣角成像鏡片組的球差、像散及歪曲曲線圖。 圖3A係本發明第三實施例之廣角成像鏡片組的示意圖。 圖3B由左至右依序為第三實施例的廣角成像鏡片組的球差、像散及歪曲曲線圖。 圖4A係本發明第四實施例之廣角成像鏡片組的示意圖。 圖4B由左至右依序為第四實施例的廣角成像鏡片組的球差、像散及歪曲曲線圖。 圖5A係本發明第五實施例之廣角成像鏡片組的示意圖。 圖5B由左至右依序為第五實施例的廣角成像鏡片組的球差、像散及歪曲曲線圖。 圖6A係本發明第六實施例之廣角成像鏡片組的示意圖。 圖6B由左至右依序為第六實施例的廣角成像鏡片組的球差、像散及歪曲曲線圖。 圖7A係本發明第七實施例之廣角成像鏡片組的示意圖。 圖7B由左至右依序為第七實施例的廣角成像鏡片組的球差、像散及歪曲曲線圖。 圖8A係本發明第八實施例之廣角成像鏡片組的示意圖。 圖8B由左至右依序為第八實施例的廣角成像鏡片組的球差、像散及歪曲曲線圖。Fig. 1A is a schematic view showing a wide-angle imaging lens group of a first embodiment of the present invention. 1B is a spherical aberration, astigmatism, and distortion curve of the wide-angle imaging lens group of the first embodiment, from left to right. 2A is a schematic view of a wide-angle imaging lens set of a second embodiment of the present invention. 2B is a spherical aberration, astigmatism, and distortion curve of the wide-angle imaging lens group of the second embodiment, from left to right. Fig. 3A is a schematic view showing a wide-angle imaging lens group of a third embodiment of the present invention. 3B is a spherical aberration, astigmatism, and distortion curve of the wide-angle imaging lens group of the third embodiment, from left to right. 4A is a schematic view of a wide-angle imaging lens set of a fourth embodiment of the present invention. 4B is a spherical aberration, astigmatism, and distortion curve of the wide-angle imaging lens group of the fourth embodiment, from left to right. Fig. 5A is a schematic view showing a wide-angle imaging lens group of a fifth embodiment of the present invention. Fig. 5B is a spherical aberration, astigmatism, and distortion curve of the wide-angle imaging lens group of the fifth embodiment, from left to right. Fig. 6A is a schematic view showing a wide-angle imaging lens group of a sixth embodiment of the present invention. Fig. 6B is a spherical aberration, astigmatism, and distortion curve of the wide-angle imaging lens group of the sixth embodiment, from left to right. Fig. 7A is a schematic view showing a wide-angle imaging lens group of a seventh embodiment of the present invention. Fig. 7B is a spherical aberration, astigmatism, and distortion curve of the wide-angle imaging lens group of the seventh embodiment, from left to right. Fig. 8A is a schematic view showing a wide-angle imaging lens group of an eighth embodiment of the present invention. Fig. 8B is a spherical aberration, astigmatism, and distortion curve of the wide-angle imaging lens group of the eighth embodiment, from left to right.
100‧‧‧光圈
100‧‧‧ aperture
110‧‧‧第一透鏡
110‧‧‧first lens
111‧‧‧物側表面
111‧‧‧Side side surface
112‧‧‧像側表面
112‧‧‧ image side surface
120‧‧‧第二透鏡
120‧‧‧second lens
121‧‧‧物側表面
121‧‧‧Side side surface
122‧‧‧像側表面
122‧‧‧ image side surface
130‧‧‧第三透鏡
130‧‧‧ third lens
131‧‧‧物側表面
131‧‧‧ object side surface
132‧‧‧像側表面
132‧‧‧Image side surface
140‧‧‧第四透鏡
140‧‧‧Fourth lens
141‧‧‧物側表面
141‧‧‧ object side surface
142‧‧‧像側表面
142‧‧‧ image side surface
170‧‧‧紅外線濾除濾光元件
170‧‧‧Infrared filter components
180‧‧‧成像面
180‧‧‧ imaging surface
190‧‧‧光軸
190‧‧‧ optical axis