CN106980167B - Imaging lens group - Google Patents
- ️Tue Jul 23 2019
技术领域technical field
本发明是与成像镜片组有关，特别是指一种应用于电子产品上的小型化五片式成像镜片组。The present invention is related to an imaging lens set, in particular to a miniaturized five-piece imaging lens set applied to electronic products.
背景技术Background technique
高画质的小型摄影镜头已是当前各种行动装置的标准配备，又随着半导体制成的进步，使得电子感光组件上的画素面积愈来越小，进而使得摄像镜头需要有更精细的解析力，以便能呈现更细致的画质。High-quality small photographic lenses are the standard equipment of various mobile devices. With the advancement of semiconductor manufacturing, the pixel area on electronic photosensitive components is getting smaller and smaller, which makes the photographic lens need to have a finer resolution. power for a more detailed picture.
已知搭载于行动装置，如手机，平板计算机，与可穿戴式的其他电子装置等的3至4片式小型镜头，如US 7,564,635、US 7,920,340，并无法呈现更细致的画质；而五片式的小型镜头，或许能有较佳的画质，然而在大光圈时，如US 8,605,368、US8,649,113、TW申请号102137030、102121155，往往易伴随有制造组装的感度问题，使量产不易，增加量产的成本。又或者为降低组装公差，不得已牺牲周边的成像质量，使周边的成像模糊或变形。It is known that 3 to 4 small lenses mounted on mobile devices, such as mobile phones, tablet computers, and other wearable electronic devices, such as US 7,564,635, US 7,920,340, cannot present more detailed image quality; A small-sized lens of the same type may have better image quality. However, when the aperture is large, such as US 8,605,368, US 8,649,113, TW Application Nos. 102137030, 102121155, it is often accompanied by sensitivity problems in manufacturing and assembly, making mass production difficult. Increase the cost of mass production. Or in order to reduce the assembly tolerance, the peripheral imaging quality has to be sacrificed, so that the peripheral imaging is blurred or deformed.
所以，持续开发出一种具有高解析能力并具备低制造组装公差的高画质镜头，即是本发明研发的动机。Therefore, it is the motivation of the present invention to continuously develop a high-quality lens with high resolution and low manufacturing and assembly tolerances.
发明内容SUMMARY OF THE INVENTION
本发明的目的在于提供一种成像镜片组，尤指一种具高画数、高解析能力、低歪曲变形及低制造组装公差感度的五片式成像镜片组。The object of the present invention is to provide an imaging lens set, especially a five-piece imaging lens set with high picture count, high resolution, low distortion and low manufacturing and assembly tolerance sensitivity.
为了达成前述目的，依据本发明所提供的一种成像镜片组，由物侧至像侧依序包含：一光圈；一第一透镜，具有正屈折力，其物侧表面近光轴处为凸面，其像侧表面近光轴处为凸面，其物侧表面与像侧表面至少一表面为非球面；一第二透镜，具有负屈折力，其物侧表面近光轴处为凸面，其物侧表面与像侧表面至少一表面为非球面；一第三透镜，具有屈折力，其像侧表面近光轴处为凹面，其物侧表面与像侧表面至少一表面为非球面；一第四透镜，具有正屈折力，其物侧表面近光轴处为凹面，其像侧表面近光轴处为凸面，其物侧表面与像侧表面至少一表面为非球面；一第五透镜，具有负屈折力，其物侧表面近光轴处为凹面，其像侧表面近光轴处为凹面，其物侧表面与像侧表面至少一表面为非球面，其物侧表面及像侧表面至少一表面具有至少一反曲点；In order to achieve the aforementioned object, an imaging lens set provided by the present invention includes sequentially from the object side to the image side: an aperture; a first lens having positive refractive power, and the object-side surface near the optical axis is a convex surface , its image-side surface near the optical axis is convex, and at least one surface of its object-side surface and the image-side surface is aspherical; a second lens, with negative refractive power, its object-side surface near the optical axis is convex, its object At least one surface of the side surface and the image side surface is aspherical; a third lens has refractive power, 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 first lens Four lenses with positive refractive power, the object side surface is concave near the optical axis, the image side surface near the optical axis is convex, and at least one surface of the object side surface and the image side surface is aspherical; a fifth lens, It has negative refractive power, its object-side surface is concave at the near-optical axis, its image-side surface is concave at the near-optical axis, at least one surface of its object-side surface and image-side surface is aspherical, and its object-side surface and image-side surface are concave. at least one surface has at least one inflection point;
其中该第二透镜、第三透镜与第四透镜的合成焦距为f234，该第五透镜的焦距为f5，并满足下列条件：-1.8<f234/f5<-1.0。藉由屈折力的适当配置，有助于减少球差、像散的产生。The combined focal length of the second lens, the third lens and the fourth lens is f234, the focal length of the fifth lens is f5, and the following conditions are satisfied: -1.8<f234/f5<-1.0. Appropriate configuration of the refracting force helps to reduce the generation of spherical aberration and astigmatism.
较佳地，该第二透镜的物侧表面近光轴处为凸面、像侧表面近光轴处为凹面；该第三透镜的物侧表面近光轴处为凸面、像侧表面近光轴处为凹面。Preferably, the object-side surface of the second lens is convex at the near-optical axis, and the image-side surface is concave at the near-optical axis; the object-side surface of the third lens is convex at the near-optical axis, and the image-side surface near the optical axis is convex. is concave.
较佳地，该第一透镜的焦距为f1，该第二透镜的焦距为f2，并满足下列条件：-0.75<f1/f2<-0.4。藉此，使该第一透镜与该第二透镜的屈折力配置较为合适，可有利于获得广泛的画角(视场角)且减少系统像差的过度增大。Preferably, the focal length of the first lens is f1, the focal length of the second lens is f2, and the following conditions are satisfied: -0.75<f1/f2<-0.4. In this way, the refractive powers of the first lens and the second lens are appropriately configured, which is beneficial to obtain a wide picture angle (field of view) and reduce excessive increase of system aberrations.
较佳地，该第二透镜的焦距为f2，该第四透镜的焦距为f4，并满足下列条件：-2.6<f2/f4<-1.8。藉此，有利于提升成像镜片组的大视角、大光圈特性，且可降低其敏感度，有利于各透镜的制作，并提高生产良率。Preferably, the focal length of the second lens is f2, the focal length of the fourth lens is f4, and the following conditions are satisfied: -2.6<f2/f4<-1.8. In this way, it is beneficial to improve the large viewing angle and large aperture characteristics of the imaging lens group, and can reduce the sensitivity thereof, which is beneficial to the manufacture of each lens, and improves the production yield.
较佳地，该第四透镜的焦距为f4，该第五透镜的焦距为f5，并满足下列条件：-1.35<f4/f5<-0.9。藉此，可有效缩短成像镜片组的后焦距，维持其小型化。Preferably, the focal length of the fourth lens is f4, and the focal length of the fifth lens is f5, and the following conditions are satisfied: -1.35<f4/f5<-0.9. In this way, the back focal length of the imaging lens group can be effectively shortened and the miniaturization can be maintained.
较佳地，该第一透镜的焦距为f1，该第三透镜的焦距为f3，并满足下列条件：-0.1<f1/f3<0.15。藉此，可维持成像镜片组的屈折力平衡，进而达到最佳成像效果。Preferably, the focal length of the first lens is f1, the focal length of the third lens is f3, and the following conditions are satisfied: -0.1<f1/f3<0.15. In this way, the refracting power balance of the imaging lens group can be maintained, thereby achieving the best imaging effect.
较佳地，该第二透镜的焦距为f2，该第五透镜的焦距为f5，并满足下列条件：1.8<f2/f5<3.1。藉此，有助于缩短成像镜片组的总长，并维持其小型化。Preferably, the focal length of the second lens is f2, the focal length of the fifth lens is f5, and the following conditions are satisfied: 1.8<f2/f5<3.1. Thereby, the overall length of the imaging lens group can be shortened and the miniaturization can be maintained.
较佳地，该第一透镜的焦距为f1，该第四透镜的焦距为f4，并满足下列条件：0.9<f1/f4<1.5。藉此，可维持成像镜片组的屈折力平衡，进而达到最佳成像效果。Preferably, the focal length of the first lens is f1, the focal length of the fourth lens is f4, and the following conditions are satisfied: 0.9<f1/f4<1.5. In this way, the refracting power balance of the imaging lens group can be maintained, thereby achieving the best imaging effect.
较佳地，该第一透镜的焦距为f1，该第二透镜与第三透镜的合成焦距为f23，并满足下列条件：-0.7<f1/f23<-0.5。藉此，可维持成像镜片组的屈折力平衡，进而达到最佳成像效果。Preferably, 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 conditions are satisfied: -0.7<f1/f23<-0.5. In this way, the refracting power balance of the imaging lens group can be maintained, thereby achieving the best imaging effect.
较佳地，该第二透镜与第三透镜的合成焦距为f23，该第四透镜与第五透镜的合成焦距为f45，并满足下列条件：-0.35<f23/f45<-0.05。当f23/f45满足前述关系式，则可令该成像镜片组在具备大画角、高画数和低镜头高度，同时解像能力显著提升，反之，若超出上述光学式的数据值范围，则会导致成像镜片组的性能、解像力低，以及良率不足等问题。Preferably, the composite focal length of the second lens and the third lens is f23, the composite focal length of the fourth lens and the fifth lens is f45, and the following conditions are satisfied: -0.35<f23/f45<-0.05. When f23/f45 satisfies the aforementioned relationship, the imaging lens group can have a large picture angle, high picture number, and low lens height, while the resolution capability is significantly improved. This leads to problems such as low performance, low resolution, and insufficient yield of the imaging lens set.
较佳地，该第一透镜与第二透镜的合成焦距为f12，该第三透镜与第四透镜的合成焦距为f34，并满足下列条件：1.4<f12/f34<2.8。当f12/f34满足前述关系式，则可令该成像镜片组在具备大画角、高画数和低镜头高度，同时解像能力显著提升，反之，若超出上述光学式的数据值范围，则会导致成像镜片组的性能、解像力低，以及良率不足等问题。Preferably, the composite focal length of the first lens and the second lens is f12, the composite focal length of the third lens and the fourth lens is f34, and the following conditions are satisfied: 1.4<f12/f34<2.8. When f12/f34 satisfies the above relationship, the imaging lens group can have a large picture angle, high picture number and low lens height, while the resolution ability is significantly improved. On the contrary, if the data value range of the above optical equation is exceeded, the This leads to problems such as low performance, low resolution, and insufficient yield of the imaging lens set.
较佳地，该第三透镜与第四透镜的合成焦距为f34，该第五透镜的焦距为f5，并满足下列条件：-1.4<f34/f5<-0.9。当f34/f5满足前述关系式，则可令该成像镜片组在具备大画角、高画数和低镜头高度，同时解像能力显著提升，反之，若超出上述光学式的数据值范围，则会导致成像镜片组的性能、解像力低，以及良率不足等问题。Preferably, 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 conditions are satisfied: -1.4<f34/f5<-0.9. When f34/f5 satisfies the above relationship, the imaging lens group can have a large picture angle, high picture number and low lens height, while the resolution ability is significantly improved. On the contrary, if it exceeds the data value range of the above optical formula, it will This leads to problems such as low performance, low resolution, and insufficient yield of the imaging lens set.
较佳地，该第一透镜的焦距为f1，该第二透镜、第三透镜与第四透镜的合成焦距为f234，并满足下列条件：0.6<f1/f234<1.5。藉由屈折力的适当配置，有助于减少球差、像散的产生。Preferably, 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 conditions are satisfied: 0.6<f1/f234<1.5. Appropriate configuration of the refracting force helps to reduce the generation of spherical aberration and astigmatism.
较佳地，该第二透镜与第三透镜的合成焦距为f23，该第四透镜的焦距为f4，并满足下列条件：-2.3<f23/f4<-1.5。藉此，有利于提升成像镜片组的大视角、大光圈特性，且可降低其敏感度，有利于各透镜的制作，并提高生产良率。Preferably, the combined focal length of the second lens and the third lens is f23, the focal length of the fourth lens is f4, and the following conditions are satisfied: -2.3<f23/f4<-1.5. In this way, it is beneficial to improve the large viewing angle and large aperture characteristics of the imaging lens group, and can reduce the sensitivity thereof, which is beneficial to the manufacture of each lens, and improves the production yield.
较佳地，该第一透镜、第二透镜与第三透镜的合成焦距为f123，该第四透镜的焦距为f4，并满足下列条件：1.6<f123/f4<2.7。藉由屈折力的适当配置，有助于减少球差、像散的产生。Preferably, the combined focal length of the first lens, the second lens and the third lens is f123, the focal length of the fourth lens is f4, and the following conditions are satisfied: 1.6<f123/f4<2.7. Appropriate configuration of the refracting force helps to reduce the generation of spherical aberration and astigmatism.
较佳地，该第一透镜、第二透镜与第三透镜的合成焦距为f123，该第四透镜与第五透镜的合成焦距为f45，并满足下列条件：0.05<f123/f45<0.4。藉由屈折力的适当配置，有助于减少球差、像散的产生。Preferably, the composite focal length of the first lens, the second lens and the third lens is f123, the composite focal length of the fourth lens and the fifth lens is f45, and the following conditions are satisfied: 0.05<f123/f45<0.4. Appropriate configuration of the refracting force helps to reduce the generation of spherical aberration and astigmatism.
较佳地，该第一透镜的色散系数为V1，该第二透镜的色散系数为V2，并满足下列条件：30<V1-V2<42。藉此，可修正该成像镜片组的色差。Preferably, the dispersion coefficient of the first lens is V1, the dispersion coefficient of the second lens is V2, and the following conditions are satisfied: 30<V1-V2<42. Thereby, the chromatic aberration of the imaging lens group can be corrected.
较佳地，该第四透镜的色散系数为V4，该第三透镜的色散系数为V3，并满足下列条件：30<V4-V3<42。藉此，可修正该成像镜片组的色差。Preferably, the dispersion coefficient of the fourth lens is V4, the dispersion coefficient of the third lens is V3, and the following conditions are satisfied: 30<V4-V3<42. Thereby, the chromatic aberration of the imaging lens group can be corrected.
较佳地，该成像镜片组的整体焦距为f，该第一透镜的物侧表面至成像面于光轴上的距离为TL，并满足下列条件：0.6<f/TL<0.95。藉此，可有利于获得广泛的画角(视场角)及有利于维持该成像镜片组的小型化，以搭载于轻薄的电子产品上。Preferably, the overall focal length of the 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: 0.6<f/TL<0.95. In this way, it is beneficial to obtain a wide picture angle (field of view) and to maintain the miniaturization of the imaging lens group so as to be mounted on thin and light electronic products.
有关本发明为达成上述目的，所采用的技术、手段及其他的功效，兹举三较佳可行实施例并配合图式详细说明如后。Regarding the techniques, means and other effects adopted by the present invention to achieve the above-mentioned objects, three preferred feasible embodiments are given and described in detail with the drawings as follows.
附图说明Description of drawings
为了更清楚地说明本发明的技术方案，下面对本发明所需要使用的附图作简单的介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to illustrate the technical solutions of the present invention more clearly, the following briefly introduces the accompanying drawings used in the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, which are useful to those skilled in the art. In other words, other drawings can also be obtained from these drawings without any creative effort.
图1A是本发明第一实施例的成像镜片组的示意图。FIG. 1A is a schematic diagram of an imaging lens set according to a first embodiment of the present invention.
图1B由左至右依序为第一实施例的成像镜片组的球差、像散及歪曲曲线图。FIG. 1B is a graph of spherical aberration, astigmatism and distortion curves of the imaging lens group of the first embodiment in sequence from left to right.
图2A是本发明第二实施例的成像镜片组的示意图。2A is a schematic diagram of an imaging lens set according to a second embodiment of the present invention.
图2B由左至右依序为第二实施例的成像镜片组的球差、像散及歪曲曲线图。FIG. 2B is a graph showing spherical aberration, astigmatism and distortion of the imaging lens group of the second embodiment in sequence from left to right.
图3A是本发明第三实施例的成像镜片组的示意图。3A is a schematic diagram of an imaging lens set according to a third embodiment of the present invention.
图3B由左至右依序为第三实施例的成像镜片组的球差、像散及歪曲曲线图。FIG. 3B is a graph of spherical aberration, astigmatism and distortion of the imaging lens group of the third embodiment in sequence from left to right.
附图标记说明Description of reference numerals
100、200、300：光圈100, 200, 300: Aperture
110、210、310：第一透镜 120、220、320：第二透镜110, 210, 310: first lens 120, 220, 320: second lens
130、230、330：第三透镜 140、240、340：第四透镜130, 230, 330: the third lens 140, 240, 340: the fourth lens
150、250、350：第五透镜 170、270、370：红外线滤除滤光组件150, 250, 350: Fifth lens 170, 270, 370: Infrared filter element
180、280、380：成像面 190、290、390：光轴180, 280, 380: Imaging plane 190, 290, 390: Optical axis
f：成像镜片组的焦距 Fno：成像镜片组的光圈值f: The focal length of the imaging lens group Fno: The aperture value of the imaging lens group
FOV：成像镜片组中最大视场角 f1：第一透镜的焦距FOV: the largest field of view in the imaging lens group f1: the focal length of the first lens
f2：第二透镜的焦距 f3：第三透镜的焦距f2: Focal length of the second lens f3: Focal length of the third lens
f4：第四透镜的焦距 f5：第五透镜的焦距f4: Focal length of the fourth lens f5: Focal length of the fifth lens
f12：第一透镜与第二透镜的合成焦距 f23：第二透镜与第三透镜的合成焦距f12: The composite focal length of the first lens and the second lens f23: The composite focal length of the second lens and the third lens
f34：第三透镜与第四透镜的合成焦距 f45：第四透镜与第五透镜的合成焦距f34: Composite focal length of the third lens and fourth lens f45: Composite focal length of the fourth lens and fifth lens
V1：第一透镜的色散系数 V2：第二透镜的色散系数V1: Dispersion coefficient of the first lens V2: Dispersion coefficient of the second lens
V3：第三透镜的色散系数 V4：第四透镜的色散系数V3: Dispersion coefficient of the third lens V4: Dispersion coefficient of the fourth lens
f123：第一透镜、第二透镜与第三透镜的合成焦距f123: Composite focal length of the first lens, the second lens and the third lens
f234：第二透镜、第三透镜与第四透镜的合成焦距f234: Composite focal length of the second lens, the third lens and the fourth lens
TL：第一透镜的物侧表面至成像面于光轴上的距离TL: The distance from the object side surface of the first lens to the imaging surface on the optical axis
111、211、311、121、221、321、131、231、331、141、241、341、151、251、351：物侧表面111, 211, 311, 121, 221, 321, 131, 231, 331, 141, 241, 341, 151, 251, 351: Object side surface
112、212、312、122、222、322、132、232、332、142、242、342、152、252、352：像侧表面112, 212, 312, 122, 222, 322, 132, 232, 332, 142, 242, 342, 152, 252, 352: Image side surface
具体实施方式Detailed ways
<第一实施例><First Embodiment>
请参照图1A及图1B，其中图1A绘示依照本发明第一实施例的成像镜片组的示意图，图1B由左至右依序为第一实施例的成像镜片组的球差、像散及歪曲曲线图。由图1A可知，成像镜片组系包含有一光圈100和一光学组，该光学组由物侧至像侧依序包含第一透镜110、第二透镜120、第三透镜130、第四透镜140、第五透镜150、红外线滤除滤光组件170、以及成像面180，其中该成像镜片组中具屈折力的透镜为五片。该光圈100设置在该第一透镜110的像侧表面112与被摄物之间。Please refer to FIGS. 1A and 1B , wherein FIG. 1A is a schematic diagram of the imaging lens set according to the first embodiment of the present invention, and FIG. 1B is the spherical aberration and astigmatism of the imaging lens set of the first embodiment from left to right. and distorted graphs. As can be seen from FIG. 1A , the imaging lens group includes an aperture 100 and an optical group, and the optical group sequentially includes a first lens 110 , a second lens 120 , a third lens 130 , a fourth lens 140 , and a second lens 120 from the object side to the image side. The fifth lens 150, the infrared filter element 170, and the imaging surface 180, wherein the imaging lens group has five lenses with refractive power. The aperture 100 is disposed between the image-side surface 112 of the first lens 110 and the subject.
该第一透镜110具有正屈折力，且为塑料材质，其物侧表面111近光轴190处为凸面，其像侧表面112近光轴190处为凸面，且该物侧表面111及像侧表面112皆为非球面。The first lens 110 has a positive refractive power and is made of plastic material. The object-side surface 111 is convex at the near-optical axis 190, the image-side surface 112 is convex at the near-optical axis 190, and the object-side surface 111 and the image-side surface are convex. The surfaces 112 are all aspherical.
该第二透镜120具有负屈折力，且为塑料材质，其物侧表面121近光轴190处为凸面，其像侧表面122近光轴190处为凹面，且该物侧表面121及像侧表面122皆为非球面。The second lens 120 has a negative refractive power and is made of plastic material. The object-side surface 121 is convex at the near-optical axis 190, the image-side surface 122 is concave at the near-optical axis 190, and the object-side surface 121 and the image-side surface are concave. The surfaces 122 are all aspherical.
该第三透镜130具有负屈折力，且为塑料材质，其物侧表面131近光轴190处为凸面，其像侧表面132近光轴190处为凹面，且该物侧表面131及像侧表面132皆为非球面。The third lens 130 has a negative refractive power and is made of plastic material. The object-side surface 131 is convex at the near-optical axis 190, the image-side surface 132 is concave at the near-optical axis 190, and the object-side surface 131 and the image-side surface are concave. The surfaces 132 are all aspherical.
该第四透镜140具有正屈折力，且为塑料材质，其物侧表面141近光轴190处为凹面，其像侧表面142近光轴190处为凸面，且该物侧表面141及像侧表面142皆为非球面。The fourth lens 140 has a positive refractive power and is made of plastic material. The object-side surface 141 is concave at the near-optical axis 190, the image-side surface 142 is convex at the near-optical axis 190, and the object-side surface 141 and the image-side surface are convex. The surfaces 142 are all aspherical.
该第五透镜150具有负屈折力，且为塑料材质，其物侧表面151近光轴190处为凹面，其像侧表面152近光轴190处为凹面，且该物侧表面151及像侧表面152皆为非球面，且该物侧表面151及该像侧表面152至少一表面具有至少一反曲点。The fifth lens 150 has a negative refractive power and is made of plastic material. The object-side surface 151 is concave at the near-optical axis 190, the image-side surface 152 is concave at the near-optical axis 190, and the object-side surface 151 and the image-side surface are concave. The surfaces 152 are all aspherical surfaces, and at least one surface of the object-side surface 151 and the image-side surface 152 has at least one inflection point.
该红外线滤除滤光组件170为玻璃材质，其设置于该第五透镜150及成像面180间且不影响该成像镜片组的焦距。The infrared filter element 170 is made of glass, which is disposed between the fifth lens 150 and the imaging surface 180 and does not affect the focal length of the imaging lens group.
上述各透镜的非球面的曲线方程式表示如下：The curve equations of the aspheric surfaces of the above-mentioned lenses are expressed as follows:
其中z为沿光轴190方向在高度为h的位置以表面顶点作参考的位置值；c是透镜表面靠近光轴190的曲率，并为曲率半径(R)的倒数(c＝1/R)，R为透镜表面靠近光轴190的曲率半径，h是透镜表面距离光轴190的垂直距离，k为圆锥系数(conic constant)，而A、B、C、D、E、G、……为高阶非球面系数。Where z is the position value along the optical axis 190 at the height h with the surface vertex as a reference; c is the curvature of the lens surface close to 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 close to the optical axis 190, h is the vertical distance of the lens surface from the optical axis 190, k is the conic constant, and A, B, C, D, E, G, ... are Higher order aspheric coefficients.
第一实施例的成像镜片组中，成像镜片组的焦距为f，成像镜片组的光圈值(f-number)为Fno，成像镜片组中最大视场角为FOV，其数值如下：f＝3.710(公厘)；Fno＝2.0；以及FOV＝78(度)。In the imaging lens group of the first embodiment, the focal length of the imaging lens group is f, the aperture value (f-number) of the imaging lens group is Fno, and the maximum field of view in the imaging lens group is FOV, and the values are as follows: f=3.710 (mm); Fno=2.0; and FOV=78 (degrees).
第一实施例的成像镜片组中，该第一透镜110为f1，该第二透镜120为f2，并满足下列条件：f1/f2＝-0.5210。In the imaging lens set of the first embodiment, the first lens 110 is f1, the second lens 120 is f2, and the following conditions are satisfied: f1/f2=-0.5210.
第一实施例的成像镜片组中，该第二透镜120为f2，该第四透镜140为f4，并满足下列条件：f2/f4＝-2.0249。In the imaging lens group of the first embodiment, the second lens 120 is f2, the fourth lens 140 is f4, and the following conditions are satisfied: f2/f4=-2.0249.
第一实施例的成像镜片组中，该第四透镜140为f4，该第五透镜150为f5，并满足下列条件：f4/f5＝-1.1917。In the imaging lens group of the first embodiment, the fourth lens 140 is f4, the fifth lens 150 is f5, and the following conditions are satisfied: f4/f5=-1.1917.
第一实施例的成像镜片组中，该第一透镜110为f1，该第三透镜130为f3，并满足下列条件：f1/f3＝-0.0860。In the imaging lens group of the first embodiment, the first lens 110 is f1, the third lens 130 is f3, and the following conditions are satisfied: f1/f3=-0.0860.
第一实施例的成像镜片组中，该第二透镜120为f2，该第五透镜150为f5，并满足下列条件：f2/f5＝2.4131。In the imaging lens set of the first embodiment, the second lens 120 is f2, the fifth lens 150 is f5, and the following conditions are satisfied: f2/f5=2.4131.
第一实施例的成像镜片组中，该第一透镜110为f1，该第四透镜140为f4，并满足下列条件：f1/f4＝1.0549。In the imaging lens group of the first embodiment, the first lens 110 is f1, the fourth lens 140 is f4, and the following conditions are satisfied: f1/f4=1.0549.
第一实施例的成像镜片组中，该第一透镜110为f1，该第二透镜120与第三透镜130的合成焦距为f23，并满足下列条件：f1/f23＝-0.6159。In the imaging lens set of the first embodiment, 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=-0.6159.
第一实施例的成像镜片组中，该第二透镜120与第三透镜130的合成焦距为f23，该第四透镜140与第五透镜150的合成焦距为f45，并满足下列条件：f23/f45＝-0.0622。In the imaging lens set of the first embodiment, the composite focal length of the second lens 120 and the third lens 130 is f23, the composite focal length of the fourth lens 140 and the fifth lens 150 is f45, and the following conditions are met: f23/f45 =-0.0622.
第一实施例的成像镜片组中，该第一透镜110与第二透镜120的合成焦距为f12，该第三透镜130与第四透镜140的合成焦距为f34，并满足下列条件：f12/f34＝1.6071。In the imaging lens set of the first embodiment, the composite focal length of the first lens 110 and the second lens 120 is f12, the composite focal length of the third lens 130 and the fourth lens 140 is f34, and the following conditions are met: f12/f34 =1.6071.
第一实施例的成像镜片组中，该第三透镜130与第四透镜140的合成焦距为f34，该第五透镜150的焦距为f5，并满足下列条件：f34/f5＝-1.2606。In the imaging 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 conditions are satisfied: f34/f5=-1.2606.
第一实施例的成像镜片组中，该第一透镜的焦距为f1，该第二透镜120、第三透镜130与第四透镜140的合成焦距为f234，并满足下列条件：f1/f234＝0.7515。In the imaging lens set of the first embodiment, the focal length of the first lens is f1, 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=0.7515 .
第一实施例的成像镜片组中，该第二透镜120、第三透镜130与第四透镜140的合成焦距为f234，该第五透镜150的焦距为f5，并满足下列条件：f234/f5＝-1.6727。In the imaging 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, the focal length of the fifth lens 150 is f5, and the following conditions are met: f234/f5= -1.6727.
第一实施例的成像镜片组中，该第一透镜110、第二透镜120与第三透镜130的合成焦距为f123，该第四透镜140的焦距为f4，并满足下列条件：f123/f4＝1.8554。In the imaging lens set of the first embodiment, the combined focal length of the first lens 110, the second lens 120 and the third lens 130 is f123, the focal length of the fourth lens 140 is f4, and the following conditions are satisfied: f123/f4= 1.8554.
第一实施例的成像镜片组中，该第一透镜110、第二透镜120与第三透镜130的合成焦距为f123，该第四透镜140与第五透镜150的合成焦距为f45，并满足下列条件：f123/f45＝0.0674。In the imaging 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, the composite focal length of the fourth lens 140 and the fifth lens 150 is f45, and the following are satisfied: Condition: f123/f45=0.0674.
第一实施例的成像镜片组中，该第一透镜110的色散系数为V1，该第二透镜120的色散系数为V2，并满足下列条件：V1-V2＝34.5。In the imaging lens set of the first embodiment, the dispersion coefficient of the first lens 110 is V1, and the dispersion coefficient of the second lens 120 is V2, and the following conditions are satisfied: V1-V2=34.5.
第一实施例的成像镜片组中，该第四透镜140的色散系数为V4，该第三透镜130的色散系数为V3，并满足下列条件：V4-V3＝34.5。In the imaging lens set of the first embodiment, the dispersion coefficient of the fourth lens 140 is V4, and the dispersion coefficient of the third lens 130 is V3, and the following conditions are satisfied: V4-V3=34.5.
第一实施例的成像镜片组中，该成像镜片组的整体焦距为f，该第一透镜110的物侧表面111至成像面180于光轴190上的距离为TL，并满足下列条件：f/TL＝0.8281。In the imaging lens group of the first embodiment, the overall focal length of the imaging lens group is f, the distance from the object-side surface 111 of the first lens 110 to the imaging surface 180 on the optical axis 190 is TL, and the following conditions are met: f /TL=0.8281.
再配合参照下列表1及表2。Refer to Table 1 and Table 2 below for further cooperation.
表1为图1A第一实施例详细的结构数据，其中曲率半径、厚度及焦距的单位为mm，且表面0-15依序表示由物侧至像侧的表面。表2为第一实施例中的非球面数据，其中，k表非球面曲线方程式中的锥面系数，A、B、C、D、E、F、……为高阶非球面系数。此外，以下各实施例表格乃对应各实施例的示意图与像差曲线图，表格中数据的定义皆与第一实施例的表1、及表2的定义相同，在此不加赘述。Table 1 is the detailed structural data of the first embodiment of FIG. 1A , wherein the unit of curvature radius, thickness and focal length is mm, and surfaces 0-15 represent the surfaces from the object side to the image side in order. Table 2 is the aspheric surface data in the first embodiment, wherein k represents the cone surface coefficient in the aspheric surface curve equation, and A, B, C, D, E, F, . . . are high-order aspheric surface coefficients. In addition, the following tables of the embodiments are schematic diagrams and aberration curves corresponding to each embodiment, and the definitions of the data in the tables are the same as those in Table 1 and Table 2 of the first embodiment, and will not be repeated here.
<第二实施例><Second Embodiment>
请参照图2A及图2B，其中图2A绘示依照本发明第二实施例的成像镜片组的示意图，图2B由左至右依序为第二实施例的成像镜片组的球差、像散及歪曲曲线图。由图2A可知，成像镜片组是包含有一光圈200和一光学组，该光学组由物侧至像侧依序包含第一透镜210、第二透镜220、第三透镜230、第四透镜240、第五透镜250、红外线滤除滤光组件270、以及成像面280，其中该成像镜片组中具屈折力的透镜为五片。该光圈200设置在该第一透镜210的像侧表面212与被摄物之间。Please refer to FIGS. 2A and 2B , wherein FIG. 2A is a schematic diagram of the imaging lens set according to the second embodiment of the present invention, and FIG. 2B is the spherical aberration and astigmatism of the imaging lens set of the second embodiment from left to right. and distorted graphs. It can be seen from FIG. 2A that the imaging lens group includes an aperture 200 and an optical group, and the optical group sequentially includes a first lens 210, a second lens 220, a third lens 230, a fourth lens 240, The fifth lens 250, the infrared filter element 270, and the imaging surface 280, wherein the imaging lens group has five lenses with refractive power. The aperture 200 is disposed between the image-side surface 212 of the first lens 210 and the subject.
该第一透镜210具有正屈折力，且为塑料材质，其物侧表面211近光轴290处为凸面，其像侧表面212近光轴290处为凸面，且该物侧表面211及像侧表面212皆为非球面。The first lens 210 has a positive refractive power and is made of plastic material. The object-side surface 211 is convex at the near-optical axis 290, the image-side surface 212 is convex at the near-optical axis 290, and the object-side surface 211 and the image-side surface are convex. The surfaces 212 are all aspherical.
该第二透镜220具有负屈折力，且为塑料材质，其物侧表面221近光轴290处为凸面，其像侧表面222近光轴290处为凹面，且该物侧表面221及像侧表面222皆为非球面。The second lens 220 has a negative refractive power and is made of plastic material. The object-side surface 221 is convex at the near-optical axis 290, the image-side surface 222 is concave at the near-optical axis 290, and the object-side surface 221 and the image-side surface 221 are concave. The surfaces 222 are all aspherical.
该第三透镜230具有负屈折力，且为塑料材质，其物侧表面231近光轴290处为凸面，其像侧表面232近光轴290处为凹面，且该物侧表面231及像侧表面232皆为非球面。The third lens 230 has a negative refractive power and is made of plastic material. The object-side surface 231 is convex at the near-optical axis 290, the image-side surface 232 is concave at the near-optical axis 290, and the object-side surface 231 and the image-side surface 231 are concave. The surfaces 232 are all aspherical.
该第四透镜240具有正屈折力，且为塑料材质，其物侧表面241近光轴290处为凹面，其像侧表面242近光轴290处为凸面，且该物侧表面241及像侧表面242皆为非球面。The fourth lens 240 has a positive refractive power and is made of plastic material. The object-side surface 241 is concave at the near-optical axis 290, the image-side surface 242 is convex at the near-optical axis 290, and the object-side surface 241 and the image-side surface 241 are concave. The surfaces 242 are all aspherical.
该第五透镜250具有负屈折力，且为塑料材质，其物侧表面251近光轴290处为凹面，其像侧表面252近光轴290处为凹面，且该物侧表面251及像侧表面252皆为非球面，且该物侧表面251及该像侧表面252至少一表面具有至少一反曲点。The fifth lens 250 has a negative refractive power and is made of plastic material. The object-side surface 251 is concave at the near-optical axis 290, the image-side surface 252 is concave at the near-optical axis 290, and the object-side surface 251 and the image-side surface 251 are concave. The surfaces 252 are all aspherical, and at least one surface of the object-side surface 251 and the image-side surface 252 has at least one inflection point.
该红外线滤除滤光组件270为玻璃材质，其设置于该第五透镜250及成像面280间且不影响该成像镜片组的焦距。The infrared filter element 270 is made of glass, which is disposed between the fifth lens 250 and the imaging surface 280 and does not affect the focal length of the imaging lens group.
再配合参照下列表3、以及表4。For further cooperation, refer to Table 3 and Table 4 below.
第二实施例中，非球面的曲线方程式表示如第一实施例的形式。此外，下表参数的定义皆与第一实施例相同，在此不加以赘述。In the second embodiment, the curve equation of the aspheric surface is expressed as in the form of 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 repeated here.
配合表3、以及表4可推算出下列数据：According to Table 3 and Table 4, the following data can be calculated:
<第三实施例><Third Embodiment>
请参照图3A及图3B，其中图3A绘示依照本发明第三实施例的成像镜片组的示意图，图3B由左至右依序为第三实施例的成像镜片组的球差、像散及歪曲曲线图。由图3A可知，成像镜片组是包含有一光圈300和一光学组，该光学组由物侧至像侧依序包含第一透镜310、第二透镜320、第三透镜330、第四透镜340、第五透镜350、红外线滤除滤光组件370、以及成像面380，其中该成像镜片组中具屈折力的透镜为五片。该光圈300设置在该第一透镜310的像侧表面312与被摄物之间。Please refer to FIGS. 3A and 3B , wherein FIG. 3A is a schematic diagram of an imaging lens set according to a third embodiment of the present invention, and FIG. 3B shows spherical aberration and astigmatism of the imaging lens set of the third embodiment from left to right. and distorted graphs. It can be seen from FIG. 3A that the imaging lens group includes an aperture 300 and an optical group, and the optical group sequentially includes a first lens 310, a second lens 320, a third lens 330, a fourth lens 340, The fifth lens 350, the infrared filter element 370, and the imaging surface 380, wherein the imaging lens group has five lenses with refractive power. The aperture 300 is disposed between the image-side surface 312 of the first lens 310 and the subject.
该第一透镜310具有正屈折力，且为塑料材质，其物侧表面311近光轴390处为凸面，其像侧表面312近光轴390处为凸面，且该物侧表面311及像侧表面312皆为非球面。The first lens 310 has a positive refractive power and is made of plastic material. The object-side surface 311 is convex near the optical axis 390 , the image-side surface 312 is convex near the optical axis 390 , and the object-side surface 311 and the image side are convex. The surfaces 312 are all aspherical.
该第二透镜320具有负屈折力，且为塑料材质，其物侧表面321近光轴390处为凸面，其像侧表面322近光轴390处为凹面，且该物侧表面321及像侧表面322皆为非球面。The second lens 320 has a negative refractive power and is made of plastic material. The object-side surface 321 is convex at the near-optical axis 390, the image-side surface 322 is concave at the near-optical axis 390, and the object-side surface 321 and the image-side surface are concave. The surfaces 322 are all aspherical.
该第三透镜330具有正屈折力，且为塑料材质，其物侧表面331近光轴390处为凸面，其像侧表面332近光轴390处为凹面，且该物侧表面331及像侧表面332皆为非球面。The third lens 330 has a positive refractive power and is made of plastic material. The object-side surface 331 is convex at the near-optical axis 390, the image-side surface 332 is concave at the near-optical axis 390, and the object-side surface 331 and the image-side surface are concave. The surfaces 332 are all aspherical.
该第四透镜340具有正屈折力，且为塑料材质，其物侧表面341近光轴390处为凹面，其像侧表面342近光轴390处为凸面，且该物侧表面341及像侧表面342皆为非球面。The fourth lens 340 has a positive refractive power and is made of plastic material. The object-side surface 341 is concave at the near-optical axis 390, the image-side surface 342 is convex at the near-optical axis 390, and the object-side surface 341 and the image-side surface 341 are concave. The surfaces 342 are all aspherical.
该第五透镜350具有负屈折力，且为塑料材质，其物侧表面351近光轴390处为凹面，其像侧表面352近光轴390处为凹面，且该物侧表面351及像侧表面352皆为非球面，且该物侧表面351与该像侧表面352至少一表面具有至少一反曲点。The fifth lens 350 has a negative refractive power and is made of plastic material. The object-side surface 351 is concave at the near-optical axis 390, the image-side surface 352 is concave at the near-optical axis 390, and the object-side surface 351 and the image-side surface are concave. The surfaces 352 are all aspherical, and at least one surface of the object-side surface 351 and the image-side surface 352 has at least one inflection point.
该红外线滤除滤光组件370为玻璃材质，其设置于该第五透镜350及成像面380间且不影响该成像镜片组的焦距。The infrared filter element 370 is made of glass, and is disposed between the fifth lens 350 and the imaging surface 380 and does not affect the focal length of the imaging lens group.
再配合参照下列表5、以及表6。For further cooperation, refer to Table 5 and Table 6 below.
第三实施例中，非球面的曲线方程式表示如第一实施例的形式。此外，下表参数的定义皆与第一实施例相同，在此不加以赘述。In the third embodiment, the curve equation of the aspheric surface is expressed as in the form of 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 repeated here.
配合表5、以及表6可推算出下列数据：With Table 5 and Table 6, the following data can be calculated:
本发明提供的成像镜片组，透镜的材质可为塑料或玻璃，当透镜材质为塑料，可以有效降低生产成本，另当透镜的材质为玻璃，则可以增加成像镜片组屈折力配置的自由度。此外，成像镜片组中透镜的物侧表面及像侧表面可为非球面，非球面可以容易制作成球面以外的形状，获得较多的控制变量，用以消减像差，进而缩减透镜使用的数目，因此可以有效降低本发明成像镜片组的总长度。In the imaging lens group provided by the present invention, the material of the lens can be plastic or glass. When the lens material is plastic, the production cost can be effectively reduced, and when the lens material is glass, the degree of freedom in the configuration of the refractive power of the imaging lens group can be increased. In addition, the object-side surface and the image-side surface of the lens in the imaging lens group can be aspherical, and the aspherical surface can be easily made into shapes other than spherical, so as to obtain more control variables to reduce aberrations, thereby reducing the number of lenses used , so the total length of the imaging lens group of the present invention can be effectively reduced.
本发明提供的成像镜片组中，就以具有屈折力的透镜而言，若透镜表面是为凸面且未界定该凸面位置时，则表示该透镜表面于近光轴处为凸面；若透镜表面是为凹面且未界定该凹面位置时，则表示该透镜表面于近光轴处为凹面。In the imaging lens set provided by the present invention, for a lens with refractive power, if the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at the near optical axis; if the lens surface is a convex surface When the concave surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at the near optical axis.
本发明提供的成像镜片组更可视需求应用于移动对焦的光学系统中，并兼具优良像差修正与良好成像质量的特色，可多方面应用于3D(三维)影像撷取、数字相机、行动装置、数字绘图板或车用摄影等电子影像系统中。The imaging lens set provided by the present invention can be applied to the optical system of moving focus according to the needs, and has the characteristics of excellent aberration correction and good imaging quality, and can be applied to 3D (three-dimensional) image capture, digital cameras, In electronic imaging systems such as mobile devices, digital drawing tablets or car photography.
综上所述，上述各实施例及图式仅为本发明的较佳实施例而已，当不能以之限定本发明实施的范围，即大凡依本发明申请专利范围所作的均等变化与修饰，皆应属本发明专利涵盖的范围内。To sum up, the above-mentioned embodiments and drawings are only preferred embodiments of the present invention, and should not be used to limit the scope of the present invention. It should fall within the scope covered by the patent of the present invention.