TWI645215B - Five-piece optical lens system with a wide field of view - Google Patents
Five-piece optical lens system with a wide field of view Download PDFInfo
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Abstract
本發明為一種五片式廣角鏡片組,由物側至像側依序包含:一第一透鏡,具有負屈折力且為玻璃材質;一第二透鏡,具有正屈折力;一光圈;一第三透鏡,具有正屈折力;一第四透鏡,具有負屈折力;以及一第五透鏡,具有正屈折力。藉此,本發明則提供一種具廣視角、具高解析能力、短鏡頭長度、小歪曲的五片式廣角鏡片組。The invention is a five-piece wide-angle lens group comprising: a first lens having a negative refractive power and a glass material; a second lens having a positive refractive power; an aperture; a three lens having a positive refractive power; a fourth lens having a negative refractive power; and a fifth lens having a positive refractive power. Accordingly, the present invention provides a five-piece wide-angle lens group having a wide viewing angle, high resolution, short lens length, and small distortion.
Description
本發明係與五片式廣角鏡片組有關,特別是指一種應用於電子產品上的小型化五片式廣角鏡片組。 The present invention relates to a five-piece wide-angle lens group, and more particularly to a miniaturized five-piece wide-angle lens group for use in electronic products.
隨著智慧型手機及平板電腦等高規格行動裝置的發展,高畫質的小型攝影鏡頭已是標準配備,又隨著網路社群的流行,越來越多人喜歡拍照或自拍後與別人分享,又有如遊戲機、行車紀錄器、保全攝影機鏡頭等對拍攝角度需求也越來越大,因此對於鏡頭拍攝角度與畫質的要求也越來越嚴格。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,其最大視場角(FOV)均小於85度,且鏡頭組的總長度(TL)也都太長。 With the development of high-profile mobile devices such as smart phones and tablets, high-quality small photographic lenses are standard equipment, and with the popularity of the online community, more and more people like to take pictures or take selfies with others. Sharing, as well as game consoles, driving recorders, security camera lenses, etc., are also increasingly demanding for shooting angles, so the requirements for lens shooting angle and image quality are becoming more and more strict. Conventional US 8335043, US 8576497 use 2 lens groups, 5-6 pieces to achieve a large angle purpose, but its distortion is too large, such as US 8593737, US 8576497, US 8395853, its maximum field of view (FOV) Both are less than 85 degrees, and the total length (TL) of the lens group is also too long.
其次,運用在生醫、行車記錄器、攝影機或其他電子產品的攝影鏡頭,其大光圈的要求不需過於嚴苛,反而是畫角及鏡頭長度等需求才是業者需要進一步解決的問題所在,而目前的傳統搭載於前述領域中的電子產品上的攝影鏡頭,多採用四片式透鏡結構為主,皆具有畫角不足及使鏡頭長度過長等缺陷。 Secondly, the use of photographic lenses in biomedical, driving recorders, cameras or other electronic products does not require too much aperture requirements, but the need for angles and lens lengths is a problem that the industry needs to address further. At present, the photographic lenses conventionally mounted on the electronic products in the aforementioned fields mainly adopt a four-piece lens structure, and all have defects such as insufficient drawing angle and long lens length.
是以,如何開發出一種具廣視角、高解析能力、短鏡頭長度、小歪曲的廣角鏡片組,即是本發明研發的動機。 Therefore, how to develop a wide-angle lens group with wide viewing angle, high resolution capability, short lens length, and small distortion is the motivation for the development of the present invention.
本發明之目的在於提供一種五片式廣角鏡片組,尤指一種具廣視角、具高解析能力、短鏡頭長度、小歪曲的五片式廣角鏡片組。 It is an object of the present invention to provide a five-piece wide-angle lens group, and more particularly to a five-piece wide-angle lens group having a wide viewing angle, high resolution, short lens length, and small distortion.
緣是,為了達成前述目的,依據本發明所提供之一種五片式廣角鏡片組,由物側至像側依序包含:一第一透鏡,具有負屈折力且為玻璃材質,其物側表面近光軸處為凸面,其像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;一第二透鏡,具有正屈折力,其物側表面近光軸處為凹面,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;一光圈;一第三透鏡,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;一第四透鏡,具有負屈折力,其物側表面近光軸處為凹面,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;以及一第五透鏡,具有正屈折力,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。 In order to achieve the foregoing object, a five-piece wide-angle lens group according to the present invention includes, in order from the object side to the image side, a first lens having a negative refractive power and a glass material, the object side surface thereof. The near optical axis is a convex surface, and the image side surface is concave 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 positive refractive power, and the object side surface is near the optical axis The concave surface is convex on the side surface of the image side surface, and at least one surface of the object side surface and the image side surface is aspherical; an aperture; a third lens having a positive refractive power and a near side optical axis of the object side surface The convex surface is convex, 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 fourth lens has a negative refractive power, and the object side surface is concave at the near optical axis The image side surface has a convex surface at a near optical axis, and at least one surface of the object side surface and the image side surface is aspherical; and a fifth lens having a positive refractive power, the object side surface being convex at a near optical axis, At least one surface of the object side surface and the image side surface is Spherical object-side surface and image-side surface of at least one surface having at least one inflection point.
較佳地,其中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:-1.1<f1/f2<-0.25。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。 Preferably, wherein the focal length of the first lens is f1, the focal length of the second lens is f2, and the following condition is satisfied: -1.1 < f1/f2 < -0.25. 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.
較佳地,其中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:2.1<f2/f3<5。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。 Preferably, wherein the focal length of the second lens is f2, the focal length of the third lens is f3, and the following condition is satisfied: 2.1 < f2 / f3 < 5. 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.
較佳地,其中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:-1.6<f3/f4<-0.7。藉此,有效降低系統光學總長度。 Preferably, wherein the focal length of the third lens is f3, the focal length of the fourth lens is f4, and the following condition is satisfied: -1.6 < f3 / f4 < -0.7. Thereby, the total optical length of the system is effectively reduced.
較佳地,其中該第四透鏡的焦距為f4,該第五透鏡的焦距為f5,並滿足下列條件:-1<f4/f5<-0.45。藉此,可使後群透鏡系統的屈折力配置較為平衡,有利於系統敏感度的降低與高階像差的補正。 Preferably, wherein the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, and the following condition is satisfied: -1 < f4 / f5 < - 0.45. Thereby, the refractive power arrangement of the rear group lens system can be balanced, which is beneficial to the reduction of system sensitivity and the correction of high-order aberrations.
較佳地,其中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:-2.6<f1/f3<-1.8。藉此,有效分配第一透鏡的屈折力,降低五片式廣角鏡片組的敏感度。 Preferably, wherein the focal length of the first lens is f1, the focal length of the third lens is f3, and the following condition is satisfied: -2.6 < f1/f3 < -1.8. Thereby, the refractive power of the first lens is effectively distributed, and the sensitivity of the five-piece wide-angle lens group is lowered.
較佳地,其中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:-5.0<f2/f4<-3.1。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。 Preferably, wherein the focal length of the second lens is f2, the focal length of the fourth lens is f4, and the following condition is satisfied: -5.0 < f2 / f4 < -3.1. 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.
較佳地,其中該第三透鏡的焦距為f3,該第五透鏡的焦距為f5,並滿足下列條件:0.57<f3/f5<1.05。藉此,有助於縮短該五片式廣角鏡片組的總長,並維持其小型化。 Preferably, wherein the focal length of the third lens is f3, the focal length of the fifth lens is f5, and the following condition is satisfied: 0.57 < f3 / f5 < 1.05. Thereby, it contributes to shortening the total length of the five-piece wide-angle lens group and maintaining the miniaturization thereof.
較佳地,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:-3.15<f1/f23<-2.15。藉此,當f1/f23滿足上述條件時,則可令該五片式廣角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。 Preferably, 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: -3.15<f1/f23<-2.15. Thereby, when f1/f23 satisfies the above conditions, the five-piece wide-angle lens group can be significantly improved in image resolution while obtaining a wide angle of view (angle of view).
較佳地,其中該第二透鏡與第三透鏡的合成焦距為f23,該第四透鏡與第五透鏡的合成焦距為f45,並滿足下列條件:-0.35<f23/f45<0.3。當f23/f45滿足前述關係式,則可令該五片式廣角鏡片組在具備大畫角、高畫素和低鏡頭高度,同時解像能力顯著提昇,反之,若超出上述光學式之數據值範圍,則會導致該五片式廣角鏡片組之性能、解像力低,以及良率不足等問題。 Preferably, wherein the combined focal length of the second lens and the third lens is f23, the combined focal length of the fourth lens and the fifth lens is f45, and the following condition is satisfied: -0.35<f23/f45<0.3. When f23/f45 satisfies the foregoing relationship, the five-piece wide-angle lens group can have a large picture angle, a high pixel and a low lens height, and the resolution capability is remarkably improved. Conversely, if the optical data value is exceeded The range will result in problems such as low performance, low resolution, and insufficient yield of the five-piece wide-angle lens group.
較佳地,其中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:-3.6<f12/f34<-0.07。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。 Preferably, wherein the combined focal length of the first lens and the second lens is f12, the combined focal length of the third lens and the fourth lens is f34, and the following condition is satisfied: -3.6 < f12 / f34 < - 0.07. Thereby, it is advantageous to obtain a wide angle of view (angle of view) and to effectively correct the curvature of field.
較佳地,其中該第三透鏡與第四透鏡的合成焦距為f34,該第五透鏡的焦距為f5,並滿足下列條件:-46<f34/f5<8。當f34/f5滿足前述關係式,則可令該五片式廣角鏡片組在具備大畫角、高畫素和低鏡頭高度,同時解像能力顯著提昇,反之,若超出上述光學式之數據值範圍,則會導致該五片式廣角鏡片組之性能、解像力低,以及良率不足等問題。 Preferably, wherein the combined focal length of the third lens and the fourth lens is f34, the focal length of the fifth lens is f5, and the following condition is satisfied: -46 < f34 / f5 < 8. When f34/f5 satisfies the foregoing relationship, the five-piece wide-angle lens group can have a large picture angle, a high pixel and a low lens height, and the resolution capability is remarkably improved. Conversely, if the optical data value is exceeded The range will result in problems such as low performance, low resolution, and insufficient yield of the five-piece wide-angle lens group.
較佳地,其中該第一透鏡的焦距為f1,該第二透鏡、第三透鏡與第四透鏡的合成焦距為f234,並滿足下列條件:-1<f1/f234<-0.17。藉由屈折力的適當配置,有助於減少球差、像散的產生。 Preferably, wherein the focal length of the first lens is f1, the combined focal length of the second lens, the third lens and the fourth lens is f234, and the following condition is satisfied: -1 < f1/f234 < -0.17. By proper configuration of the refractive power, it helps to reduce the occurrence of spherical aberration and astigmatism.
較佳地,其中該第二透鏡、第三透鏡與第四透鏡的合成焦距為f234,該第五透鏡的焦距為f5,並滿足下列條件:2<f234/f5<5.5。藉由屈折力的適當配置,有助於減少球差、像散的產生。 Preferably, wherein the second lens, the third lens and the fourth lens have a combined focal length of f234, the fifth lens has a focal length of f5, and satisfies the following condition: 2<f234/f5<5.5. By proper configuration of the refractive power, it helps to reduce the occurrence of spherical aberration and astigmatism.
較佳地,其中該第一透鏡、第二透鏡與第三透鏡的合成焦距為f123,該第四透鏡的焦距為f4,並滿足下列條件:-0.8<f123/f4<-0.3。藉由屈折力的適當配置,有助於減少球差、像散的產生。 Preferably, wherein the first lens, the second lens and the third lens have a combined focal length of f123, the fourth lens has a focal length of f4, and satisfies the following condition: -0.8<f123/f4<-0.3. By proper configuration of the refractive power, it helps to reduce the occurrence of spherical aberration and astigmatism.
較佳地,其中該第一透鏡、第二透鏡與第三透鏡的合成焦距為f123,該第四透鏡與第五透鏡的合成焦距為f45,並滿足下列條件:-0.28<f123/f45<0.27。藉由屈折力的適當配置,有助於減少球差、像散的產生。 Preferably, wherein the first lens, the second lens and the third lens have a combined focal length of f123, the fourth lens and the fifth lens have a combined focal length of f45, and satisfy the following condition: -0.28<f123/f45<0.27 . By proper configuration of the refractive power, it helps to reduce the occurrence of spherical aberration and astigmatism.
較佳地,其中該第一透鏡的焦距為f1,該第二透鏡、第三透鏡、第四透鏡與第五透鏡的合成焦距為f2345,並滿足下列條件:-2.3<f1/f2345<-1.6。藉此,當f1/f2345滿足前述關係式,則可令該五片式廣角鏡片組在具備大畫角, 同時解像能力顯著提昇,反之,若超出上述光學式之數據值範圍,則會導致該五片式廣角鏡片組之性能、解像力低,以及良率不足等問題。 Preferably, wherein the focal length of the first lens is f1, the combined focal length of the second lens, the third lens, the fourth lens and the fifth lens is f2345, and the following condition is satisfied: -2.3<f1/f2345<-1.6 . Thereby, when f1/f2345 satisfies the foregoing relationship, the five-piece wide-angle lens group can have a large picture angle. At the same time, the resolution capability is significantly improved. Conversely, if the optical data value range is exceeded, the performance of the five-piece wide-angle lens group, low resolution, and insufficient yield are caused.
較佳地,其中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:27<V1-V2<40。藉此,有效降低五片式廣角鏡片組的色差。 Preferably, wherein the first lens has a dispersion coefficient of V1, the second lens has a dispersion coefficient of V2, and satisfies the following condition: 27 < V1 - V2 < 40. Thereby, the chromatic aberration of the five-piece wide-angle lens group is effectively reduced.
較佳地,其中該第三透鏡的色散係數為V3,該第四透鏡的色散係數為V4,並滿足下列條件:27<V3-V4<40。藉此,有效降低五片式廣角鏡片組的色差。 Preferably, wherein the third lens has a dispersion coefficient of V3, the fourth lens has a dispersion coefficient of V4, and satisfies the following condition: 27<V3-V4<40. Thereby, the chromatic aberration of the five-piece wide-angle lens group is effectively reduced.
較佳地,其中該五片式廣角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:0.05<f/TL<0.2。藉此,可有利於獲得廣泛的畫角(視場角)及有利於維持該五片式廣角鏡片組的小型化,以搭載於輕薄的電子產品上。 Preferably, wherein the overall focal length of the five-piece wide-angle lens group is f, the distance from the object side surface of the first lens to the imaging plane on the optical axis is TL, and the following condition is satisfied: 0.05 < f / TL < 0.2 . Thereby, it is advantageous to obtain a wide picture angle (angle of view) and to facilitate the miniaturization of the five-piece wide-angle lens group to be mounted on a thin electronic product.
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,茲舉五較佳可行實施例並配合圖式詳細說明如後。 With regard to the techniques, means, and other effects of the present invention in light of the above-described objects, the preferred embodiments are described in detail with reference to the drawings.
100、200、300、400、500‧‧‧光圈 100, 200, 300, 400, 500‧ ‧ aperture
110、210、310、410、510‧‧‧第一透鏡 110, 210, 310, 410, 510‧‧‧ first lens
111、211、311、411、511‧‧‧物側表面 111, 211, 311, 411, 511 ‧ ‧ ‧ side surface
112、212、312、412、512‧‧‧像側表面 112, 212, 312, 412, 512‧‧‧ image side surface
120、220、320、420、520‧‧‧第二透鏡 120, 220, 320, 420, 520‧‧‧ second lens
121、221、321、421、521‧‧‧物側表面 121, 221, 321, 421, 521‧‧‧ ‧ side surface
122、222、322、422、522‧‧‧像側表面 122, 222, 322, 422, 522‧‧‧ image side surface
130、230、330、430、530‧‧‧第三透鏡 130, 230, 330, 430, 530‧‧‧ third lens
131、231、331、431、531‧‧‧物側表面 131, 231, 331, 431, 531‧‧‧ ‧ side surface
132、232、332、432、532‧‧‧像側表面 132, 232, 332, 432, 532‧‧‧ image side surface
140、240、340、440、540‧‧‧第四透鏡 140, 240, 340, 440, 540 ‧ ‧ fourth lens
141、241、341、441、541‧‧‧物側表面 141, 241, 341, 441, 541 ‧ ‧ ‧ side surface
142、242、342、442、542‧‧‧像側表面 142, 242, 342, 442, 542‧‧‧ side surface
150、250、350、450、550‧‧‧第五透鏡 150, 250, 350, 450, 550 ‧ ‧ fifth lens
151、251、351、451、551‧‧‧物側表面 151, 251, 351, 451, 551 ‧ ‧ ‧ side surface
152、252、352、452、552‧‧‧像側表面 152, 252, 352, 452, 552‧‧‧ side surface
160、260、360、470、570‧‧‧紅外線濾除濾光元件 160, 260, 360, 470, 570‧‧‧ Infrared filtering filter elements
170、270、370‧‧‧保護玻璃 170, 270, 370‧ ‧ protective glass
180、280、380、480、580‧‧‧成像面 180, 280, 380, 480, 580‧‧ ‧ imaging surface
190、290、390、490、590‧‧‧光軸 190, 290, 390, 490, 590‧‧ ‧ optical axis
f‧‧‧五片式成像鏡片組的焦距 f‧‧‧Focus of the five-piece imaging lens set
Fno‧‧‧五片式成像鏡片組的光圈值 Aperture value of Fno‧‧‧ five-piece imaging lens set
FOV‧‧‧五片式成像鏡片組中最大視場角 Maximum field of view in the FOV‧‧‧ five-piece imaging lens set
f1‧‧‧第一透鏡的焦距 F1‧‧‧The focal length of the first lens
f2‧‧‧第二透鏡的焦距 F2‧‧‧The focal length of the second lens
f3‧‧‧第三透鏡的焦距 f3‧‧‧The focal length of the third lens
f4‧‧‧第四透鏡的焦距 F4‧‧‧The focal length of the fourth lens
f5‧‧‧第五透鏡的焦距 f5‧‧‧Focus of the fifth lens
f12‧‧‧第一透鏡與第二透鏡的合成焦距 F12‧‧‧Combined focal length of the first lens and the second lens
f23‧‧‧第二透鏡與第三透鏡的合成焦距 F23‧‧‧Combined focal length of the second lens and the third lens
f34‧‧‧第三透鏡與第四透鏡的合成焦距 F34‧‧‧Combined focal length of the third lens and the fourth lens
f45‧‧‧第四透鏡與第五透鏡的合成焦距 F45‧‧‧Combined focal length of the fourth lens and the fifth lens
f123‧‧‧第一透鏡、第二透鏡與第三透鏡的合成焦距 F123‧‧‧Combined focal length of the first lens, the second lens and the third lens
f234‧‧‧第二透鏡、第三透鏡與第四透鏡的合成焦距 f234‧‧‧Combined focal length of the second lens, the third lens and the fourth lens
f2345‧‧‧第二透鏡、第三透鏡、第四透鏡與第五透鏡的合成焦距 F2345‧‧‧Combined focal length of the second lens, the third lens, the fourth lens and the fifth lens
V2‧‧‧第二透鏡的色散係數 V2‧‧‧Dispersion coefficient of the second lens
V3‧‧‧第三透鏡的色散係數 V3‧‧‧Dispersion coefficient of the third lens
V4‧‧‧第四透鏡的色散係數 V4‧‧‧Dispersion coefficient of the fourth lens
V5‧‧‧第五透鏡的色散係數 Dispersion coefficient of V5‧‧‧ fifth lens
TL‧‧‧第一透鏡的物側表面至成像面於光軸上的距離 TL‧‧‧The distance from the object side surface of the first lens to the imaging surface on the optical axis
圖1A係本發明第一實施例之五片式廣角鏡片組的示意圖。 Fig. 1A is a schematic view showing a five-piece wide-angle lens group according to a first embodiment of the present invention.
圖1B由左至右依序為第一實施例的五片式廣角鏡片組的像面彎曲及歪曲收差曲線圖。 Fig. 1B is a graph showing the curvature of field and the distortion of the five-piece wide-angle lens group of the first embodiment from left to right.
圖2A係本發明第二實施例之五片式廣角鏡片組的示意圖。 2A is a schematic view of a five-piece wide-angle lens group according to a second embodiment of the present invention.
圖2B由左至右依序為第二實施例的五片式廣角鏡片組的像面彎曲及歪曲收差曲線圖。 2B is a graph showing the curvature of field and the distortion of the five-piece wide-angle lens group of the second embodiment from left to right.
圖3A係本發明第三實施例之五片式廣角鏡片組的示意圖。 Fig. 3A is a schematic view showing a five-piece wide-angle lens group of a third embodiment of the present invention.
圖3B由左至右依序為第三實施例的五片式廣角鏡片組的像面彎曲及歪曲收差曲線圖。 Fig. 3B is a graph showing the curvature of field and the distortion of the five-piece wide-angle lens group of the third embodiment from left to right.
圖4A係本發明第四實施例之五片式廣角鏡片組的示意圖。 4A is a schematic view of a five-piece wide-angle lens group according to a fourth embodiment of the present invention.
圖4B由左至右依序為第四實施例的五片式廣角鏡片組的像面彎曲及歪曲收差曲線圖。 4B is a graph showing the curvature of field and the distortion of the five-piece wide-angle lens group of the fourth embodiment from left to right.
圖5A係本發明第五實施例之五片式廣角鏡片組的示意圖。 Fig. 5A is a schematic view showing a five-piece wide-angle lens group according to a fifth embodiment of the present invention.
圖5B由左至右依序為第五實施例的五片式廣角鏡片組的像面彎曲及歪曲收差曲線圖。 Fig. 5B is a graph showing the curvature of field and the distortion of the five-piece wide-angle lens group of the fifth embodiment from left to right.
<第一實施例> <First Embodiment>
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五片式廣角鏡片組的示意圖,圖1B由左至右依序為第一實施例的五片式廣角鏡片組的像面彎曲及歪曲收差曲線圖。由圖1A可知,五片式廣角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、第五透鏡150、紅外線濾除濾光元件160、保護玻璃170、以及成像面180,其中該五片式廣角鏡片組中具屈折力的透鏡為五片。該光圈100設置在該第二透鏡120的像側表面122與該第三透鏡130的物側表面131之間。 1A and FIG. 1B, FIG. 1A is a schematic diagram of a five-piece wide-angle lens group according to a first embodiment of the present invention, and FIG. 1B is a five-piece wide-angle lens group of the first embodiment from left to right. Image curvature and distortion curve. As can be seen from FIG. 1A, the five-piece wide-angle lens assembly includes an aperture 100 and an optical group. The optical group includes a first lens 110, a second lens 120, a third lens 130, and a fourth from the object side to the image side. The lens 140, the fifth lens 150, the infrared filter element 160, the cover glass 170, and the imaging surface 180, wherein the five-piece wide-angle lens group has five sheets of refractive power. The aperture 100 is disposed between the image side surface 122 of the second lens 120 and the object side surface 131 of the third lens 130.
該第一透鏡110具有負屈折力,且為玻璃材質,其物側表面111近光軸190處為凸面,其像側表面112近光軸190處為凹面,且該物側表面111及像側表面112皆為非球面。 The first lens 110 has a negative refractive power and is made of glass. The object side surface 111 is convex at the near optical axis 190, and the image side surface 112 is concave at the near optical axis 190, and the object side surface 111 and the image side are Surface 112 is aspherical.
該第二透鏡120具有正屈折力,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。 The second lens 120 has a positive refractive power and is made of a plastic material. The object side surface 121 is a concave surface 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 and the image side are Surface 122 is aspherical.
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處為凸面,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。 The third lens 130 has a positive refractive power and is made of a plastic material. The object side surface 131 is convex 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 and the image side are The surfaces 132 are all aspherical.
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處為凹面,其像側表面142近光軸190處為凸面,且該物側表面141及像側表面142皆為非球面。 The fourth lens 140 has a negative refractive power and is made of a plastic material. The object side surface 141 is concave at the near optical axis 190, and the image side surface 142 is convex at the near optical axis 190, and the object side surface 141 and the image side are Surfaces 142 are all aspherical.
該第五透鏡150具有正屈折力,且為塑膠材質,其物側表面151近光軸190處為凸面,其像側表面152近光軸190處為凹面,且該物側表面151及像側表面152皆為非球面,且該物側表面151及該像側表面152至少一表面具有至少一反曲點。 The fifth lens 150 has a positive refractive power and is made of a plastic material. The object side surface 151 is convex at the near optical axis 190, and the image side surface 152 is concave at the near optical axis 190, and the object side surface 151 and the image side are The surface 152 is aspherical, and at least one surface of the object side surface 151 and the image side surface 152 has at least one inflection point.
該紅外線濾除濾光元件160為玻璃材質,其設置於該第五透鏡150及保護玻璃170間且不影響該五片式廣角鏡片組的焦距。 The infrared filter element 160 is made of glass and disposed between the fifth lens 150 and the cover glass 170 without affecting the focal length of the five-piece wide-angle lens group.
該保護玻璃170為玻璃材質,其設置於該紅外線濾除濾光元件160及成像面180間且不影響該五片式廣角鏡片組的焦距。該保護玻璃170係用以保護感測元件(圖上未示)。 The cover glass 170 is made of glass and is disposed between the infrared filter element 160 and the imaging surface 180 without affecting the focal length of the five-piece wide-angle lens group. The cover glass 170 is used to protect the sensing element (not shown).
上述各透鏡的非球面的曲線方程式表示如下:
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。 Where z is the 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.
第一實施例的五片式廣角鏡片組中,五片式廣角鏡片組的焦距為f,五片式廣角鏡片組的光圈值(f-number)為Fno,五片式廣角鏡片組中最大視場角 (畫角)為FOV,其數值如下:f=1.63(公厘);Fno=2.0;以及FOV=173(度)。 In the five-piece wide-angle lens group of the first embodiment, the focal length of the five-piece wide-angle lens group is f, the aperture value (f-number) of the five-piece wide-angle lens group is Fno, and the maximum magnification of the five-piece wide-angle lens group. Field angle (Drawing angle) is FOV, and its value is as follows: f = 1.63 (mm); Fno = 2.0; and FOV = 173 (degrees).
第一實施例的五片式廣角鏡片組中,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=-0.498。 In the five-piece wide-angle 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 = -0.498.
第一實施例的五片式廣角鏡片組中,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=4.072。 In the five-piece wide-angle 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 = 4.072.
第一實施例的五片式廣角鏡片組中,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=-1.019。 In the five-piece wide-angle 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 = -1.019.
第一實施例的五片式廣角鏡片組中,該第四透鏡140的焦距為f4,該第五透鏡150的焦距為f5,並滿足下列條件:f4/f5=-0.827。 In the five-piece wide-angle lens group of the first embodiment, the focal length of the fourth lens 140 is f4, the focal length of the fifth lens 150 is f5, and the following condition is satisfied: f4/f5 = -0.827.
第一實施例的五片式廣角鏡片組中,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=-2.026。 In the five-piece wide-angle 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=-2.026.
第一實施例的五片式廣角鏡片組中,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=-4.150。 In the five-piece wide-angle 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=-4.150.
第一實施例的五片式廣角鏡片組中,該第三透鏡130的焦距為f3,該第五透鏡150的焦距為f5,並滿足下列條件:f3/f5=0.844。 In the five-piece wide-angle lens group of the first embodiment, the focal length of the third lens 130 is f3, the focal length of the fifth lens 150 is f5, and the following condition is satisfied: f3/f5=0.844.
第一實施例的五片式廣角鏡片組中,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=-2.338。 In the five-piece wide-angle 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 condition is satisfied: f1/f23=-2.338 .
第一實施例的五片式廣角鏡片組中,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與第五透鏡150的合成焦距為f45,並滿足下列條件:f23/f45=0.110。 In the five-piece wide-angle lens group of the first embodiment, the composite focal length of the second lens 120 and the third lens 130 is f23, and the combined focal length of the fourth lens 140 and the fifth lens 150 is f45, and the following conditions are satisfied: F23/f45=0.110.
第一實施例的五片式廣角鏡片組中,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=-1.508。 In the five-piece wide-angle 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=-1.508.
第一實施例的五片式廣角鏡片組中,該第三透鏡130與第四透鏡140的合成焦距為f34,該第五透鏡150的焦距為f5,並滿足下列條件:f34/f5=7.688。 In the five-piece wide-angle lens group of the first embodiment, the combined focal length of the third lens 130 and the fourth lens 140 is f34, and the focal length of the fifth lens 150 is f5, and the following condition is satisfied: f34/f5=7.688.
第一實施例的五片式廣角鏡片組中,該第一透鏡的焦距為f1,該第二透鏡120、第三透鏡130與第四透鏡140的合成焦距為f234,並滿足下列條件:f1/f234=-0.765。 In the five-piece wide-angle lens group of the first embodiment, the focal length of the first lens is f1, and the combined focal length of the second lens 120, the third lens 130, and the fourth lens 140 is f234, and the following conditions are met: f1/ F234=-0.765.
第一實施例的五片式廣角鏡片組中,該第二透鏡120、第三透鏡130與第四透鏡140的合成焦距為f234,該第五透鏡150的焦距為f5,並滿足下列條件:f234/f5=2.234。 In the five-piece wide-angle lens group of the first embodiment, the combined focal length of the second lens 120, the third lens 130, and the fourth lens 140 is f234, and the focal length of the fifth lens 150 is f5, and the following condition is satisfied: f234 /f5=2.234.
第一實施例的五片式廣角鏡片組中,該第一透鏡110、第二透鏡120與第三透鏡130的合成焦距為f123,該第四透鏡140的焦距為f4,並滿足下列條件:f123/f4=-0.612。 In the five-piece wide-angle lens group of the first embodiment, the composite focal length of the first lens 110, the second lens 120, and the third lens 130 is f123, and the focal length of the fourth lens 140 is f4, and the following condition is satisfied: f123 /f4=-0.612.
第一實施例的五片式廣角鏡片組中,該第一透鏡110、第二透鏡120與第三透鏡130的合成焦距為f123,該第四透鏡140與第五透鏡150的合成焦距為f45,並滿足下列條件:f123/f45=0.076。 In the five-piece wide-angle lens group of the first embodiment, the composite focal length of the first lens 110, the second lens 120, and the third lens 130 is f123, and the combined focal length of the fourth lens 140 and the fifth lens 150 is f45. And the following conditions are met: f123/f45=0.076.
第一實施例的五片式廣角鏡片組中,該第一透鏡110的焦距為f1,該第二透鏡120、第三透鏡130、第四透鏡140與第五透鏡150的合成焦距為f2345,並滿足下列條件:f1/f2345=-1.849。 In the five-piece wide-angle lens group of the first embodiment, the focal length of the first lens 110 is f1, and the combined focal length of the second lens 120, the third lens 130, the fourth lens 140, and the fifth lens 150 is f2345, and The following conditions are met: f1/f2345=-1.849.
第一實施例的五片式廣角鏡片組中,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=33.3。 In the five-piece wide-angle 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 = 33.3.
第一實施例的五片式廣角鏡片組中,該第三透鏡130的色散係數為V3,該第四透鏡140的色散係數為V4,並滿足下列條件:V3-V4=34.6。 In the five-piece wide-angle lens group of the first embodiment, the third lens 130 has a dispersion coefficient of V3, and the fourth lens 140 has a dispersion coefficient of V4 and satisfies the following condition: V3-V4=34.6.
第一實施例的五片式廣角鏡片組中,該五片式廣角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=0.158。 In the five-piece wide-angle lens group of the first embodiment, the overall focal length of the five-piece wide-angle 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 = 0.158.
再配合參照下列表1及表2。 Refer to Table 1 and Table 2 below for reference.
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0-17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、...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面彎曲及歪曲收差曲線圖,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。 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 surfaces 0-17 sequentially represent 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, ... are high-order aspheric coefficients. In addition, the tables in the following embodiments correspond to the schematic diagrams of the respective embodiments and the curvature of field and the distortion diagram of the distortion, and the definitions of the data in the table are the same as those of Tables 1 and 2 of the first embodiment, and Add a statement.
<第二實施例> <Second embodiment>
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五片式廣角鏡片組的示意圖,圖2B由左至右依序為第二實施例的五片式廣角鏡片組的像面彎曲及歪曲收差曲線圖。由圖2A可知,五片式廣角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、第五透鏡250、紅外線濾除濾光元件260、保護玻璃270、以及成像面280,其中該五片式廣角鏡片組中具屈折力的透鏡為五片。該光圈200設置在該第二透鏡220的像側表面222與該第三透鏡230的物側表面231之間。 Please refer to FIG. 2A and FIG. 2B , wherein FIG. 2A is a schematic diagram of a five-piece wide-angle lens group according to a second embodiment of the present invention, and FIG. 2B is a five-piece wide-angle lens group of the second embodiment from left to right. Image curvature and distortion curve. As can be seen from FIG. 2A, the five-piece wide-angle lens assembly includes an aperture 200 and an optical group. The optical group includes a first lens 210, a second lens 220, a third lens 230, and a fourth from the object side to the image side. The lens 240, the fifth lens 250, the infrared filter element 260, the cover glass 270, and the imaging surface 280, wherein the five-piece wide-angle lens group has five sheets of refractive power. The aperture 200 is disposed between the image side surface 222 of the second lens 220 and the object side surface 231 of the third lens 230.
該第一透鏡210具有正屈折力,且為玻璃材質,其物側表面211近光軸290處為凸面,其像側表面212近光軸290處為凹面,且該物側表面211及像側表面212皆為非球面。 The first lens 210 has a positive refractive power and is made of glass. The object side surface 211 is convex at the near optical axis 290, and the image side surface 212 is concave at the near optical axis 290, and the object side surface 211 and the image side are Surface 212 is aspherical.
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。 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 and the image side are Surfaces 222 are all aspherical.
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處為凸面,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。 The third lens 230 has a positive refractive power and is made of a plastic material. The object side surface 231 is convex 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 and the image side are Surfaces 232 are all aspherical.
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處為凹面,其像側表面242近光軸290處為凸面,且該物側表面241及像側表面242皆為非球面。 The fourth lens 240 has a negative refractive power and is made of a plastic material. The object side surface 241 is concave at the near optical axis 290, and the image side surface 242 is convex at the near optical axis 290, and the object side surface 241 and the image side are Surface 242 is aspherical.
該第五透鏡250具有正屈折力,且為塑膠材質,其物側表面251近光軸290處為凸面,其像側表面252近光軸290處為凹面,且該物側表面251及像側表面252皆為非球面,且該物側表面251及該像側表面252至少一表面具有至少一反曲點。 The fifth lens 250 has a positive refractive power and is made of a plastic material. The object side surface 251 is convex at the near optical axis 290, and the image side surface 252 is concave at the near optical axis 290, and the object side surface 251 and the image side are The surface 252 is aspherical, and at least one surface of the object side surface 251 and the image side surface 252 has at least one inflection point.
該紅外線濾除濾光元件260為玻璃材質,其設置於該第五透鏡250及保護玻璃270間且不影響該五片式廣角鏡片組的焦距。 The infrared filter element 260 is made of glass and is disposed between the fifth lens 250 and the cover glass 270 without affecting the focal length of the five-piece wide-angle lens group.
該保護玻璃270為玻璃材質,其設置於該紅外線濾除濾光元件260及成像面280間且不影響該五片式廣角鏡片組的焦距。該保護玻璃270係用以保護感測元件(圖上未示)。 The cover glass 270 is made of glass and disposed between the infrared filter element 260 and the imaging surface 280 without affecting the focal length of the five-piece wide-angle lens group. The cover glass 270 is used to protect the sensing element (not shown).
再配合參照下列表3、以及表4。 Refer to Table 3 and Table 4 below.
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。 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.
配合表3、以及表4可推算出下列數據:
<第三實施例> <Third embodiment>
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五片式廣角鏡片組的示意圖,圖3B由左至右依序為第三實施例的五片式廣角鏡片組的像面彎曲及歪曲收差曲線圖。由圖3A可知,五片式廣角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、第五透鏡350、紅外線濾除濾光元件360、保護玻璃370、以及成像面380,其中該五片式廣角鏡片組中具屈折力的透鏡為五片。該光圈300設置在該第二透鏡320的像側表面322與該第三透鏡330的物側表面331之間。 Please refer to FIG. 3A and FIG. 3B , wherein FIG. 3A is a schematic diagram of a five-piece wide-angle lens group according to a third embodiment of the present invention, and FIG. 3B is a five-piece wide-angle lens group of the third embodiment from left to right. Image curvature and distortion curve. As can be seen from FIG. 3A, the five-piece wide-angle 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 from the object side to the image side. The lens 340, the fifth lens 350, the infrared filter element 360, the cover glass 370, and the imaging surface 380, wherein the five-piece wide-angle lens group has five lenses with refractive power. The aperture 300 is disposed between the image side surface 322 of the second lens 320 and the object side surface 331 of the third lens 330.
該第一透鏡310具有正屈折力,且為玻璃材質,其物側表面311近光軸390處為凸面,其像側表面312近光軸390處為凹面,且該物側表面311及像側表面312皆為非球面。 The first lens 310 has a positive refractive power and is made of glass. The object side surface 311 is convex at the near optical axis 390, and the image side surface 312 is concave at the near optical axis 390, and the object side surface 311 and the image side are Surfaces 312 are all aspherical.
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。 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 and the image side are Surfaces 322 are all aspherical.
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處為凸面,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。 The third lens 330 has a positive refractive power and is made of a plastic material. The object side surface 331 is convex at the near optical axis 390, and the image side surface 332 is convex at the near optical axis 390, and the object side surface 331 and the image side are Surface 332 is aspherical.
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處為凹面,其像側表面342近光軸390處為凸面,且該物側表面341及像側表面342皆為非球面。 The fourth lens 340 has a negative refractive power and is made of a plastic material, and the object side surface 341 is concave at the near optical axis 390, and the image side surface 342 is convex at the near optical axis 390, and the object side surface 341 and the image side are Surfaces 342 are all aspherical.
該第五透鏡350具有正屈折力,且為塑膠材質,其物側表面351近光軸390處為凸面,其像側表面352近光軸390處為凹面,且該物側表面351及像側表面352皆為非球面,且該物側表面351及該像側表面352至少一表面具有至少一反曲點。 The fifth lens 350 has a positive refractive power and is made of a plastic material. The object side surface 351 is convex at the near optical axis 390, and the image side surface 352 is concave at the near optical axis 390, and the object side surface 351 and the image side are The surface 352 is aspherical, and at least one surface of the object side surface 351 and the image side surface 352 has at least one inflection point.
該紅外線濾除濾光元件360為玻璃材質,其設置於該第五透鏡350及保護玻璃370間且不影響該五片式廣角鏡片組的焦距。 The infrared filter element 360 is made of glass and disposed between the fifth lens 350 and the cover glass 370 without affecting the focal length of the five-piece wide-angle lens group.
該保護玻璃370為玻璃材質,其設置於該紅外線濾除濾光元件360及成像面380間且不影響該五片式廣角鏡片組的焦距。該保護玻璃370係用以保護感測元件(圖上未示)。 The cover glass 370 is made of glass and disposed between the infrared filter element 360 and the imaging surface 380 without affecting the focal length of the five-piece wide-angle lens group. The cover glass 370 is used to protect the sensing element (not shown).
再配合參照下列表5、以及表6。 Refer to Table 5 and Table 6 below for reference.
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。 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.
配合表5、以及表6可推算出下列數據:
<第四實施例> <Fourth embodiment>
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五片式成像鏡片組的示意圖,圖4B由左至右依序為第四實施例的五片式成像鏡片組的像面彎曲及歪曲收差曲線圖。由圖4A可知,五片式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、第五透鏡450、紅外線濾除濾光元件470、以及成像面480,其中該五片式成像鏡片組中具屈折力的透鏡為五片。該光圈400設置在該第二透鏡420的像側表面422與該第三透鏡430的物側表面431之間。 4A and 4B, wherein FIG. 4A is a schematic diagram of a five-piece imaging lens set according to a fourth embodiment of the present invention, and FIG. 4B is a five-piece imaging lens set of the fourth embodiment from left to right. Image curvature and distortion curve. As can be seen from FIG. 4A, the five-piece 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 from the object side to the image side. The lens 440, the fifth lens 450, the infrared filter element 470, and the imaging surface 480, wherein the five-piece imaging lens group has five lenses with refractive power. The aperture 400 is disposed between the image side surface 422 of the second lens 420 and the object side surface 431 of the third lens 430.
該第一透鏡410具有負屈折力,且為玻璃材質,其物側表面411近光軸490處為凸面,其像側表面412近光軸490處為凹面,且該物側表面411及像側表面412皆為非球面。 The first lens 410 has a negative refractive power and is made of glass. The object side surface 411 is convex at the near optical axis 490, and the image side surface 412 is concave at the near optical axis 490, and the object side surface 411 and the image side are Surface 412 is aspherical.
該第二透鏡420具有正屈折力,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。 The second lens 420 has a positive 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 and the image side are Surface 422 is aspherical.
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處為凸面,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。 The third lens 430 has a positive refractive power and is made of a plastic material. The object side surface 431 is convex 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 and the image side are Surface 432 is aspherical.
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處為凹面,其像側表面442近光軸490處為凸面,且該物側表面441及像側表面442皆為非球面。 The fourth lens 440 has a negative refractive power and is made of a plastic material. The object side surface 441 is concave at the near optical axis 490, and the image side surface 442 is convex at the near optical axis 490, and the object side surface 441 and the image side are Surface 442 is aspherical.
該第五透鏡450具有正屈折力,且為塑膠材質,其物側表面451近 光軸490處為凸面,其像側表面452近光軸490處為凸面,且該物側表面451及像側表面452皆為非球面,且該物側表面451及該像側表面452至少一表面具有至少一反曲點。 The fifth lens 450 has a positive refractive power and is made of a plastic material, and the object side surface 451 is near The optical axis 490 is a convex surface, and the image side surface 452 is convex at the near optical axis 490, and the object side surface 451 and the image side surface 452 are aspherical surfaces, and the object side surface 451 and the image side surface 452 are at least one. The surface has at least one inflection point.
該紅外線濾除濾光元件470為玻璃材質,其設置於該第五透鏡450及成像面480間且不影響該五片式成像鏡片組的焦距。 The infrared filter element 470 is made of glass and disposed between the fifth lens 450 and the imaging surface 480 without affecting the focal length of the five-piece imaging lens set.
再配合參照下列表7、以及表8。 Refer to Table 7 and Table 8 below for reference.
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。 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.
配合表7、以及表8可推算出下列數據:
<第五實施例> <Fifth Embodiment>
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五片式成像鏡片組的示意圖,圖5B由左至右依序為第五實施例的五片式成像鏡片組的像面彎曲及歪曲收差曲線圖。由圖5A可知,五片式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、第五透鏡550、紅外線濾除濾光元件570、以及成像面580,其中該五片式成像鏡片組中具屈折力的透鏡為五片。該光圈500設置在該 第二透鏡520的像側表面522與該第三透鏡530的物側表面531之間。 5A and 5B, wherein FIG. 5A is a schematic diagram of a five-piece imaging lens set according to a fifth embodiment of the present invention, and FIG. 5B is a five-piece imaging lens group of the fifth embodiment from left to right. Image curvature and distortion curve. As can be seen from FIG. 5A, the five-piece imaging lens assembly includes an aperture 500 and an optical group. The optical group includes a first lens 510, a second lens 520, a third lens 530, and a fourth from the object side to the image side. The lens 540, the fifth lens 550, the infrared filter element 570, and the imaging surface 580, wherein the five-piece imaging lens group has five refractive lenses. The aperture 500 is disposed at the The image side surface 522 of the second lens 520 is between the object side surface 531 of the third lens 530.
該第一透鏡510具有正屈折力,且為玻璃材質,其物側表面511近光軸590處為凸面,其像側表面512近光軸590處為凹面,且該物側表面511及像側表面512皆為非球面。 The first lens 510 has a positive refractive power and is made of glass. The object side surface 511 is convex at the near optical axis 590, and the image side surface 512 is concave at the near optical axis 590, and the object side surface 511 and the image side are Surface 512 is aspherical.
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處為凸面,且該物側表面521及像側表面522皆為非球面。 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 convex at the near optical axis 590, and the object side surface 521 and the image side are Surface 522 is aspherical.
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處為凸面,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。 The third lens 530 has a positive refractive power and is made of a plastic material. The object side surface 531 is convex 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 and the image side are Surface 532 is aspherical.
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處為凹面,其像側表面542近光軸590處為凸面,且該物側表面541及像側表面542皆為非球面。 The fourth lens 540 has a negative refractive power and is made of a plastic material. The object side surface 541 is concave at the near optical axis 590, and the image side surface 542 is convex at the near optical axis 590, and the object side surface 541 and the image side are Surface 542 is aspherical.
該第五透鏡550具有正屈折力,且為塑膠材質,其物側表面551近光軸590處為凸面,其像側表面552近光軸590處為凸面,且該物側表面551及像側表面552皆為非球面,且該物側表面551及該像側表面552至少一表面具有至少一反曲點。 The fifth lens 550 has a positive refractive power and is made of a plastic material. The object side surface 551 is convex at the near optical axis 590, and the image side surface 552 is convex at the near optical axis 590, and the object side surface 551 and the image side are The surface 552 is aspherical, and the object side surface 551 and the image side surface 552 have at least one surface having at least one inflection point.
該紅外線濾除濾光元件570為玻璃材質,其設置於該第五透鏡550及成像面580間且不影響該五片式廣角鏡片組的焦距。 The infrared filter element 570 is made of glass and disposed between the fifth lens 550 and the imaging surface 580 without affecting the focal length of the five-piece wide-angle lens group.
再配合參照下列表9、以及表10。 Refer to Table 9 and Table 10 below.
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。 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.
配合表9、以及表10可推算出下列數據:
本發明提供的五片式廣角鏡片組,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,則可以增加五片式廣角鏡片組屈折力配置的自由度。此外,五片式廣角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五片式廣角鏡片組的總長度。 The five-piece wide-angle lens group 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 five-piece wide-angle lens group can be increased. The freedom of force configuration. In addition, the object side surface and the image side surface of the lens in the five-piece wide-angle 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 lens. The number used, and thus the total length of the five-piece wide-angle lens group of the present invention can be effectively reduced.
本發明提供的五片式廣角鏡片組中,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。 In the five-piece wide-angle lens group provided by the present invention, in the case of a lens having a refractive power, if the surface of the lens is convex and the position of the convex surface is not defined, it indicates that the surface of the lens is convex at the near optical axis; When the lens surface is concave and the concave position is not defined, it indicates that the lens surface is concave at the near optical axis.
本發明提供的五片式廣角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。 The five-piece wide-angle lens group provided by the invention is more suitable for the optical system of moving focus, and has the characteristics of excellent aberration correction and good imaging quality, and can be applied to 3D (three-dimensional) image capturing and digital in many aspects. In electronic imaging systems such as cameras, mobile devices, digital tablets or car photography.
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。 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 equivalent changes and modifications made by the scope of the present invention are all It should be within the scope of the patent of the present invention.
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