TW202234118A

TW202234118A - Lens assembly

Info

Publication number: TW202234118A
Application number: TW110107018A
Authority: TW
Inventors: 張安凱
Original assignee: 大陸商信泰光學（深圳）有限公司; 亞洲光學股份有限公司
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2022-09-01
Also published as: TWI792202B

Abstract

A lens assembly includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens is a meniscus lens with negative refractive power. The second lens is a meniscus lens with positive refractive power and includes a concave surface facing an object side and a convex surface facing an image side. The third lens is a meniscus lens with positive refractive power. The fourth lens is with positive refractive power and includes a convex surface facing the object side. The fifth lens is with positive refractive power. The first lens, the second lens, the third lens, the fourth lens, and the fifth lens are arranged in order from the object side to the image side along an optical axis.

Description

成像鏡頭(五十六) Imaging Lens(56)

本發明係有關於一種成像鏡頭。 The present invention relates to an imaging lens.

現今的成像鏡頭之發展趨勢，除了不斷朝向小型化及高解析度發展外，隨著不同的應用需求，還需具備抗環境溫度變化的能力，習知的成像鏡頭已經無法滿足現今的需求，需要有另一種新架構的成像鏡頭，才能同時滿足小型化、高解析度及抗環境溫度變化的需求。 The development trend of today's imaging lenses, in addition to the continuous development of miniaturization and high resolution, with different application requirements, it is also necessary to have the ability to resist environmental temperature changes. The conventional imaging lenses can no longer meet the current needs. There is another imaging lens with a new architecture to meet the requirements of miniaturization, high resolution and resistance to environmental temperature changes at the same time.

有鑑於此，本發明之主要目的在於提供一種成像鏡頭，其鏡頭總長度較短、光圈值較小、解析度較高、抗環境溫度變化，但是仍具有良好的光學性能。 In view of this, the main purpose of the present invention is to provide an imaging lens, which has a short overall lens length, a small aperture value, a high resolution, and is resistant to changes in ambient temperature, but still has good optical performance.

本發明提供一種成像鏡頭包括一第一透鏡、一第二透鏡、一第三透鏡、一第四透鏡及一第五透鏡。第一透鏡為彎月型透鏡具有負屈光力。第二透鏡為彎月型透鏡具有正屈光力，且包括一凹面朝向一物側及一凸面朝向一像側。第三透鏡為彎月型透鏡具有正屈光力。第四透鏡具有正屈光力，且包括一凸面朝向物側。第五透鏡具有正屈光力。第一透鏡、第二透鏡、第三透鏡、第四透鏡及第五透鏡沿著一光軸從物側至像側依序排列。 The invention provides an imaging lens including a first lens, a second lens, a third lens, a fourth lens and a fifth lens. The first lens is a meniscus lens with negative refractive power. The second lens is a meniscus lens with positive refractive power, and includes a concave surface facing an object side and a convex surface facing an image side. The third lens is a meniscus lens with positive refractive power. The fourth lens has positive refractive power and includes a convex surface facing the object side. The fifth lens has positive refractive power. The first lens, the second lens, the third lens, the fourth lens and the fifth lens are sequentially arranged along an optical axis from the object side to the image side.

其中第一透鏡包括一凸面朝向物側及一凹面朝向像側，第三透鏡包括一凹面朝向物側及一凸面朝向像側。 The first lens includes a convex surface facing the object side and a concave surface facing the image side, and the third lens includes a concave surface facing the object side and a convex surface facing the image side.

其中第四透鏡為彎月型透鏡，且可更包括一凹面朝向像側，第五透鏡為雙凸透鏡，且包括一凸面朝向物側及另一凸面朝向像側。 The fourth lens is a meniscus lens and may further include a concave surface facing the image side, and the fifth lens is a biconvex lens and includes a convex surface facing the object side and another convex surface facing the image side.

其中第四透鏡為雙凸透鏡，且可更包括另一凸面朝向像側，第五透鏡為彎月型透鏡，且包括一凹面朝向物側。 The fourth lens is a biconvex lens and may further include another convex surface facing the image side, and the fifth lens is a meniscus lens and includes a concave surface facing the object side.

其中第二透鏡包括一非球面表面，第五透鏡包括一非球面表面。 The second lens includes an aspheric surface, and the fifth lens includes an aspheric surface.

本發明之成像鏡頭可更包括一光圈，設置於第二透鏡與第三透鏡之間。 The imaging lens of the present invention may further include a diaphragm disposed between the second lens and the third lens.

其中成像鏡頭滿足以下條件：0.1<ψST/TTL<0.5；其中，ψST為光圈之一孔徑，TTL為第一透鏡之一物側面至一成像面於光軸上之一間距。 The imaging lens satisfies the following conditions: 0.1<ψST/TTL<0.5; wherein, ψST is an aperture of the aperture, and TTL is the distance between the object side of the first lens and an imaging surface on the optical axis.

本發明提供另一種成像鏡頭包括一第一透鏡、一第二透鏡、一第三透鏡、一第四透鏡及一第五透鏡。第一透鏡為彎月型透鏡具有負屈光力。第二透鏡為彎月型透鏡具有正屈光力。第三透鏡為彎月型透鏡具有正屈光力。第四透鏡具有正屈光力。第五透鏡具有屈光力為單一透鏡，第五透鏡與第四透鏡之間包括一空氣間隔。第一透鏡、第二透鏡、第三透鏡、第四透鏡及第五透鏡沿著一光軸從一物側至像側依序排列。 The present invention provides another imaging lens including a first lens, a second lens, a third lens, a fourth lens and a fifth lens. The first lens is a meniscus lens with negative refractive power. The second lens is a meniscus lens with positive refractive power. The third lens is a meniscus lens with positive refractive power. The fourth lens has positive refractive power. The fifth lens has a single lens with refractive power, and an air space is included between the fifth lens and the fourth lens. The first lens, the second lens, the third lens, the fourth lens and the fifth lens are sequentially arranged along an optical axis from an object side to an image side.

其中成像鏡頭滿足以下條件：-3<f₁/f<-1.5；其中，f₁為第一透鏡之一有效焦距，f為成像鏡頭之一有效焦距。 The imaging lens satisfies the following conditions: -3<f ₁ /f<-1.5; wherein, f ₁ is an effective focal length of one of the first lenses, and f is an effective focal length of one of the imaging lenses.

其中成像鏡頭滿足以下條件：0.5<ET₅/T₅<1.5；其中，ET₅ 為第五透鏡之一邊緣厚度，T₅為第五透鏡於該光軸上之一厚度。 The imaging lens satisfies the following conditions: 0.5<ET ₅ /T ₅ <1.5; wherein, ET ₅ is an edge thickness of the fifth lens, and T ₅ is a thickness of the fifth lens on the optical axis.

其中成像鏡頭滿足以下條件：0.3<ψ2/ψ3<0.8；其中，ψ2為第二透鏡之一最大光學有效直徑，ψ3為第三透鏡之一最大光學有效直徑。 The imaging lens satisfies the following conditions: 0.3<ψ2/ψ3<0.8; wherein, ψ2 is the largest optical effective diameter of one of the second lenses, and ψ3 is the largest optical effective diameter of one of the third lenses.

為使本發明之上述目的、特徵、和優點能更明顯易懂，下文特舉較佳實施例並配合所附圖式做詳細說明。 In order to make the above objects, features, and advantages of the present invention more clearly understood, preferred embodiments are hereinafter described in detail with the accompanying drawings.

1、2、3:成像鏡頭 1, 2, 3: Imaging lens

L11、L21、L31:第一透鏡 L11, L21, L31: The first lens

L12、L22、L32:第二透鏡 L12, L22, L32: Second lens

ST1、ST2、ST3:光圈 ST1, ST2, ST3: Aperture

L13、L23、L33:第三透鏡 L13, L23, L33: Third lens

L14、L24、L34:第四透鏡 L14, L24, L34: Fourth lens

L15、L25、L35:第五透鏡 L15, L25, L35: Fifth lens

OF1、OF2、OF3:濾光片 OF1, OF2, OF3: Filters

CG1、CG2、CG3:保護玻璃 CG1, CG2, CG3: Protective glass

IMA1、IMA2、IMA3:成像面 IMA1, IMA2, IMA3: Imaging plane

OA1、OA2、OA3:光軸 OA1, OA2, OA3: Optical axis

S11、S21、S31:第一透鏡物側面 S11, S21, S31: the object side of the first lens

S12、S22、S32:第一透鏡像側面 S12, S22, S32: the image side of the first lens

S13、S23、S33:第二透鏡物側面 S13, S23, S33: the object side of the second lens

S14、S24、S34:第二透鏡像側面 S14, S24, S34: second lens image side

S15、S25、S35:光圈面 S15, S25, S35: Aperture surface

S16、S26、S36:第三透鏡物側面 S16, S26, S36: the object side of the third lens

S17、S27、S37:第三透鏡像側面 S17, S27, S37: third lens image side

S18、S28、S38:第四透鏡物側面 S18, S28, S38: the object side of the fourth lens

S19、S29、S39:第四透鏡像側面 S19, S29, S39: image side of the fourth lens

S110、S210、S310:第五透鏡物側面 S110, S210, S310: the object side of the fifth lens

S111、S211、S311:第五透鏡像側面 S111, S211, S311: Image side of the fifth lens

S112、S212、S312:濾光片物側面 S112, S212, S312: side of filter object

S113、S213、S313:濾光片像側面 S113, S213, S313: Filter image side

S114、S214、S314:保護玻璃物側面 S114, S214, S314: Protect the side of the glass object

S115、S215、S315:保護玻璃像側面 S115, S215, S315: Protective glass image side

第1圖係依據本發明之成像鏡頭之第一實施例的透鏡配置示意圖。 FIG. 1 is a schematic diagram of a lens configuration of a first embodiment of an imaging lens according to the present invention.

第2A圖係依據本發明之成像鏡頭之第一實施例的縱向像差(Longitudinal Aberration)圖。 FIG. 2A is a longitudinal aberration (Longitudinal Aberration) diagram of the first embodiment of the imaging lens according to the present invention.

第2B圖係依據本發明之成像鏡頭之第一實施例的場曲(Field Curvature)圖。 FIG. 2B is a field curvature diagram of the first embodiment of the imaging lens according to the present invention.

第2C圖係依據本發明之成像鏡頭之第一實施例的畸變(Distortion)圖。 FIG. 2C is a distortion diagram of the first embodiment of the imaging lens according to the present invention.

第3圖係依據本發明之成像鏡頭之第二實施例的透鏡配置示意圖。 FIG. 3 is a schematic diagram of the lens configuration of the second embodiment of the imaging lens according to the present invention.

第4A圖係依據本發明之成像鏡頭之第二實施例的縱向像差圖。 FIG. 4A is a longitudinal aberration diagram of the second embodiment of the imaging lens according to the present invention.

第4B圖係依據本發明之成像鏡頭之第二實施例的場曲圖。 FIG. 4B is a field curvature diagram of the second embodiment of the imaging lens according to the present invention.

第4C圖係依據本發明之成像鏡頭之第二實施例的畸變圖。 FIG. 4C is a distortion diagram of the second embodiment of the imaging lens according to the present invention.

第5圖係依據本發明之成像鏡頭之第三實施例的透鏡配置示意圖。 FIG. 5 is a schematic diagram of a lens configuration of a third embodiment of an imaging lens according to the present invention.

第6A圖係依據本發明之成像鏡頭之第三實施例的縱向像差圖。 FIG. 6A is a longitudinal aberration diagram of a third embodiment of the imaging lens according to the present invention.

第6B圖係依據本發明之成像鏡頭之第三實施例的場曲圖。 FIG. 6B is a field curvature diagram of the third embodiment of the imaging lens according to the present invention.

第6C圖係依據本發明之成像鏡頭之第三實施例的畸變圖。 FIG. 6C is a distortion diagram of a third embodiment of the imaging lens according to the present invention.

本發明提供一種成像鏡頭，包括：一第一透鏡、一第二透鏡、一第三透鏡、一第四透鏡及一第五透鏡；其中第一透鏡為彎月型透鏡具有負屈光力；其中第二透鏡為彎月型透鏡具有正屈光力，且包括一凹面朝向一物側及一凸面朝向一像側；其中第三透鏡為彎月型透鏡具有正屈光力；其中第四透鏡具有正屈光力，且包括一凸面朝向物側；其中第五透鏡具有正屈光力；其中第一透鏡、第二透鏡、第三透鏡、第四透鏡及第五透鏡沿著一光軸從物側至像側依序排列。 The invention provides an imaging lens, comprising: a first lens, a second lens, a third lens, a fourth lens and a fifth lens; wherein the first lens is a meniscus lens with negative refractive power; wherein the second lens The lens is a meniscus lens with positive refractive power, and includes a concave surface facing an object side and a convex surface facing an image side; the third lens is a meniscus lens with positive refractive power; the fourth lens has positive refractive power, and includes a The convex surface faces the object side; wherein the fifth lens has positive refractive power; wherein the first lens, the second lens, the third lens, the fourth lens and the fifth lens are sequentially arranged along an optical axis from the object side to the image side.

本發明提供另一種成像鏡頭，包括：一第一透鏡、一第二透鏡、一第三透鏡、一第四透鏡及一第五透鏡；其中第一透鏡為彎月型透鏡具有負屈光力；其中第二透鏡為彎月型透鏡具有正屈光力；其中第三透鏡為彎月型透鏡具有正屈光力；其中第四透鏡具有正屈光力；其中第五透鏡具有屈光力為單一透鏡，第五透鏡與第四透鏡之間包括一空氣間隔；其中第一透鏡、第二透鏡、第三透鏡、第四透鏡及第五透鏡沿著一光軸從一物側至像側依序排列。 The present invention provides another imaging lens, comprising: a first lens, a second lens, a third lens, a fourth lens and a fifth lens; wherein the first lens is a meniscus lens with negative refractive power; wherein the first lens The second lens is a meniscus lens with positive refractive power; the third lens is a meniscus lens with positive refractive power; the fourth lens has positive refractive power; the fifth lens has a single lens with refractive power, and the difference between the fifth lens and the fourth lens The space includes an air space; wherein the first lens, the second lens, the third lens, the fourth lens and the fifth lens are sequentially arranged along an optical axis from an object side to an image side.

請參閱底下表一、表二、表四、表五、表七及表八，其中表一、表四及表七分别為依據本發明之成像鏡頭之第一實施例至第三實施例的各透鏡之相關參數表，表二、表五及表八分别為表一、表四及表七中非球面透鏡之非球面表面之相關參數表。 Please refer to Table 1, Table 2, Table 4, Table 5, Table 7 and Table 8 below, where Table 1, Table 4 and Table 7 are respectively the first to third embodiments of the imaging lens according to the present invention. Table 2, Table 5, and Table 8 are the relevant parameter tables of the aspheric surfaces of the aspheric lenses in Table 1, Table 4, and Table 7, respectively.

第1、3、5圖分別為本發明之成像鏡頭之第一、二、三實施例的透鏡配置示意圖，其中第一透鏡L11、L21、L31為彎月型透鏡具有負屈光力，由玻璃材質製成，其物側面S11、S21、S31為凸面，像側面S12、 S22、S32為凹面，物側面S11、S21、S31與像側面S12、S22、S32皆為球面表面。 Figures 1, 3, and 5 are schematic diagrams of lens configurations of the first, second, and third embodiments of the imaging lens of the present invention, respectively, wherein the first lenses L11, L21, and L31 are meniscus lenses with negative refractive power and are made of glass material. The object sides S11, S21, S31 are convex, like the sides S12, S22, S32 are concave surfaces, and the object side surfaces S11, S21, S31 and the image side surfaces S12, S22, S32 are all spherical surfaces.

第二透鏡L12、L22、L32為彎月型透鏡具有正屈光力，由玻璃材質製成，其物側面S13、S23、S33為凹面，像側面S14、S24、S34為凸面，物側面S13、S23、S33與像側面S14、S24、S34皆為非球面表面。 The second lenses L12, L22 and L32 are meniscus lenses with positive refractive power and are made of glass material. S33 and the image side surfaces S14, S24, and S34 are all aspherical surfaces.

第三透鏡L13、L23、L33為彎月型透鏡具有正屈光力，由玻璃材質製成，其物側面S16、S26、S36為凹面，像側面S17、S27、S37為凸面，物側面S16、S26、S36與像側面S17、S27、S37皆為球面表面。 The third lenses L13, L23 and L33 are meniscus lenses with positive refractive power and are made of glass material. S36 and the image side surfaces S17, S27 and S37 are all spherical surfaces.

第四透鏡L14、L24、L34具有正屈光力，由玻璃材質製成，其物側面S18、S28、S38為凸面，物側面S18、S28、S38與像側面S19、S29、S39皆為球面表面。 The fourth lenses L14, L24 and L34 have positive refractive power and are made of glass material. The object side surfaces S18, S28 and S38 are convex surfaces, and the object side surfaces S18, S28 and S38 and the image side surfaces S19, S29 and S39 are all spherical surfaces.

第五透鏡L15、L25、L35具有正屈光力，由玻璃材質製成，其像側面S111、S211、S311為凸面，物側面S110、S210、S310與像側面S111、S211、S311皆為非球面表面。 The fifth lenses L15, L25, and L35 have positive refractive power and are made of glass material. The image sides S111, S211, and S311 are convex, and the object sides S110, S210, and S310 and the image sides S111, S211, and S311 are all aspheric surfaces.

另外，成像鏡頭1、2、3至少滿足以下其中一條件： In addition, the imaging lenses 1, 2, and 3 satisfy at least one of the following conditions:

-3<f₁/f<-1.5；(1) -3<f ₁ /f<-1.5; (1)

0.5<ET₅/T₅<1.5；(2) 0.5<ET ₅ /T ₅ <1.5; (2)

0.3<ψ2/ψ3<0.8；(3) 0.3<ψ2/ψ3<0.8; (3)

0.1<ψST/TTL<0.5；(4) 0.1<ψST/TTL<0.5; (4)

其中，f1為第一實施例至第三實施例中，第一透鏡L11、L21、L31之一有效焦距，f為第一實施例至第三實施例中，成像鏡頭1、2、3之一有效焦距，ET5為第一實施例至第三實施例中，第五透鏡L15、L25、 L35之一邊緣厚度，T5為第一實施例至第三實施例中，第五透鏡L15、L25、L35於光軸OA1、OA2、OA3上之一厚度，ψ2為第一實施例至第三實施例中，第二透鏡L12、L22、L32之一最大光學有效直徑，ψ3為第一實施例至第三實施例中，第三透鏡L13、L23、L33之一最大光學有效直徑，ψST為第一實施例至第三實施例中，光圈ST1、ST2、ST3之一孔徑，TTL為第一實施例至第三實施例中，第一透鏡L11、L21、L31之物側面S11、S21、S31分別至成像面IMA1、IMA2、IMA3於光軸OA1、OA2、OA3上之一間距。使得成像鏡頭1、2、3能有效的縮短鏡頭總長度、有效的提升解析度、有效的抗環境溫度變化、有效的修正像差。 Among them, f1 is one of the effective focal lengths of the first lenses L11, L21, L31 in the first to third embodiments, and f is one of the imaging lenses 1, 2, and 3 in the first to third embodiments Effective focal length, ET5 is the fifth lens L15, L25, An edge thickness of L35, T5 is a thickness of the fifth lenses L15, L25, L35 on the optical axes OA1, OA2, OA3 in the first to third embodiments, ψ2 is the first to third embodiments In the example, one of the second lenses L12, L22, L32 has a maximum optically effective diameter, and ψ3 is the maximum optically effective diameter of one of the third lenses L13, L23, and L33 in the first to third embodiments, and ψST is the first In the embodiment to the third embodiment, one aperture of the apertures ST1, ST2, ST3, TTL is the first embodiment to the third embodiment, the side surfaces S11, S21, S31 of the first lenses L11, L21, L31 are respectively A distance between the imaging planes IMA1, IMA2, and IMA3 on the optical axes OA1, OA2, and OA3. The imaging lenses 1, 2, and 3 can effectively shorten the total length of the lens, effectively improve the resolution, effectively resist environmental temperature changes, and effectively correct aberrations.

當滿足條件(1)：-3<f₁/f<-1.5時，可有效增加視場。 When the condition (1) is satisfied: -3<f ₁ /f<-1.5, the field of view can be effectively increased.

當滿足條件(2)：0.5<ET₅/T₅<1.5時，可有效增強加工性。 When the condition (2) is satisfied: 0.5<ET ₅ /T ₅ <1.5, the workability can be effectively enhanced.

當滿足條件(3)：0.3<ψ2/ψ3<0.8時，可有效增大成像範圍。 When the condition (3) is satisfied: 0.3<ψ2/ψ3<0.8, the imaging range can be effectively increased.

當滿足條件(4)：0.1<ψST/TTL<0.5時，可有效縮小光圈值。 When the condition (4) is satisfied: 0.1<ψST/TTL<0.5, the aperture value can be effectively reduced.

全玻璃透鏡之設計，能有效的抗環境溫度變化，使成像鏡頭於高溫或低溫環境下仍具有良好的光學性能，長時間使用後較不易劣化仍具有良好的光學性能。 The design of the all-glass lens can effectively resist environmental temperature changes, so that the imaging lens still has good optical performance in high temperature or low temperature environment, and it is less likely to deteriorate after long-term use and still has good optical performance.

現詳細說明本發明之成像鏡頭之第一實施例。請參閱第1圖，成像鏡頭1沿著一光軸OA1從一物側至一像側依序包括一第一透鏡L11、一第二透鏡L12、一光圈ST1、一第三透鏡L13、一第四透鏡L14、一第五透鏡L15、一濾光片OF1及一保護玻璃CG1。成像時，來自物側之光線最後成像於一成像面IMA1上。根據【實施方式】第一至八段落，其中： The first embodiment of the imaging lens of the present invention will now be described in detail. Referring to FIG. 1, the imaging lens 1 includes a first lens L11, a second lens L12, an aperture ST1, a third lens L13, a first lens L11, a second lens L12, an aperture ST1, a third lens L13, and a first lens in sequence from an object side to an image side along an optical axis OA1. Four lenses L14, a fifth lens L15, a filter OF1 and a protective glass CG1. During imaging, the light from the object side is finally imaged on an imaging plane IMA1. According to the first to eighth paragraphs of [Embodiment], wherein:

第四透鏡L14為彎月型透鏡，其像側面S19為凹面；第五透鏡L15為雙凸透鏡，其物側面S110為凸面； The fourth lens L14 is a meniscus lens, and its image side S19 is concave; The lens L15 is a biconvex lens, and its object side surface S110 is a convex surface;

濾光片OF1其物側面S112與像側面S113皆為平面； The object side S112 and the image side S113 of the filter OF1 are both planes;

保護玻璃CG1其物側面S114與像側面S115皆為平面； The object side S114 and the image side S115 of the protective glass CG1 are both flat surfaces;

利用上述透鏡、光圈ST1及至少滿足條件(1)至條件(4)其中一條件之設計，使得成像鏡頭1能有效的縮短鏡頭總長度、有效的提升解析度、有效的抗環境溫度變化、有效的修正像差。 Using the above-mentioned lens, aperture ST1 and the design that satisfies at least one of the conditions (1) to (4), the imaging lens 1 can effectively shorten the total length of the lens, effectively improve the resolution, effectively resist environmental temperature changes, and effectively corrected aberrations.

表一為第1圖中成像鏡頭1之各透鏡之相關參數表。 Table 1 is a table of relevant parameters of each lens of the imaging lens 1 in the first figure.

表一中非球面透鏡之非球面表面凹陷度z由下列公式所得到： The aspheric surface concavity z of the aspheric lens in Table 1 is obtained by the following formula:

z=ch²/{1+[1-(k+1)c²h²]^1/2}+Ah⁴+Bh⁶+Ch⁸ z=ch ² /{1+[1-(k+1)c ² h ² ] ^1/2 }+Ah ⁴ +Bh ⁶ +Ch ⁸

其中： in:

c：曲率； c: curvature;

h：透鏡表面任一點至光軸之垂直距離； h: the vertical distance from any point on the lens surface to the optical axis;

k：圓錐係數； k: cone coefficient;

A~C：非球面係數。 A~C: Aspheric coefficients.

表二為表一中非球面透鏡之非球面表面之相關參數表，其中k為圓錐係數(Conic Constant)、A~C為非球面係數。 Table 2 is a table of relevant parameters of the aspheric surface of the aspheric lens in Table 1, where k is the Conic Constant, and A~C are the aspheric coefficients.

表三為第一實施例之成像鏡頭1之相關參數值及其對應條件(1)至條件(4)之計算值，由表三可知，第一實施例之成像鏡頭1皆能滿足條件(1)至條件(4)之要求。 Table 3 shows the relevant parameter values of the imaging lens 1 of the first embodiment and the calculated values of the corresponding conditions (1) to (4). It can be seen from Table 3 that the imaging lens 1 of the first embodiment can meet the conditions (1) ) to the requirements of condition (4).

另外，第一實施例之成像鏡頭1的光學性能也可達到要求，由第2A圖可看出，第一實施例之成像鏡頭1其縱向像差介於-0.001mm至0.015mm之間。由第2B圖可看出，第一實施例之成像鏡頭1其場曲介於-0.04mm至0.05mm之間。由第2C圖可看出，第一實施例之成像鏡頭1其畸變介於-70%至0%之間。 In addition, the optical performance of the imaging lens 1 of the first embodiment can also meet the requirements. It can be seen from FIG. 2A that the longitudinal aberration of the imaging lens 1 of the first embodiment is between -0.001 mm and 0.015 mm. It can be seen from FIG. 2B that the field curvature of the imaging lens 1 of the first embodiment is between -0.04mm and 0.05mm. It can be seen from FIG. 2C that the distortion of the imaging lens 1 of the first embodiment is between -70% and 0%.

顯見第一實施例之成像鏡頭1之縱向像差、場曲、畸變都能被有效修正，從而得到較佳的光學性能。 It is obvious that the longitudinal aberration, field curvature and distortion of the imaging lens 1 of the first embodiment are all can be effectively corrected to obtain better optical performance.

請參閱第3圖，成像鏡頭2沿著一光軸OA2從一物側至一像側依序包括一第一透鏡L21、一第二透鏡L22、一光圈ST2、一第三透鏡L23、一第四透鏡L24、一第五透鏡L25、一濾光片OF2及一保護玻璃CG2。成像時，來自物側之光線最後成像於一成像面IMA2上。根據【實施方式】第一至八段落，其中： Referring to FIG. 3, the imaging lens 2 includes a first lens L21, a second lens L22, an aperture ST2, a third lens L23, a first lens L21, a second lens L22, a diaphragm ST2, a third lens L23, a first lens Four lenses L24, a fifth lens L25, a filter OF2 and a protective glass CG2. During imaging, the light from the object side is finally imaged on an imaging plane IMA2. According to the first to eighth paragraphs of [Embodiment], wherein:

第四透鏡L24為彎月型透鏡，其像側面S29為凹面；第五透鏡L25為雙凸透鏡，其物側面S210為凸面； The fourth lens L24 is a meniscus lens, and its image side S29 is a concave surface; the fifth lens L25 is a biconvex lens, and its object side S210 is a convex surface;

濾光片OF2其物側面S212與像側面S213皆為平面； The object side S212 and the image side S213 of the filter OF2 are both planes;

保護玻璃CG2其物側面S214與像側面S215皆為平面； The object side S214 and the image side S215 of the protective glass CG2 are both flat surfaces;

利用上述透鏡、光圈ST2及至少滿足條件(1)至條件(4)其中一條件之設計，使得成像鏡頭2能有效的縮短鏡頭總長度、有效的提升解析度、有效的抗環境溫度變化、有效的修正像差。 Using the above-mentioned lens, aperture ST2 and the design that satisfies at least one of the conditions (1) to (4), the imaging lens 2 can effectively shorten the total length of the lens, effectively improve the resolution, effectively resist environmental temperature changes, and effectively corrected aberrations.

表四為第3圖中成像鏡頭2之各透鏡之相關參數表。 Table 4 is a table of relevant parameters of each lens of the imaging lens 2 in Fig. 3 .

表四中非球面透鏡之非球面表面凹陷度z之定義，與第一實施例中表一之非球面透鏡之非球面表面凹陷度z之定義相同，在此皆不加以贅述。 The definition of the aspherical surface concavity z of the aspherical lens in Table 4 is the same as the definition of the aspherical surface concavity z of the aspherical lens in Table 1 in the first embodiment, and will not be repeated here.

表五為表四中非球面透鏡之非球面表面之相關參數表，其中k為圓錐係數(Conic Constant)、A~C為非球面係數。 Table 5 is a table of relevant parameters of the aspheric surface of the aspheric lens in Table 4, where k is the Conic Constant, and A~C are the aspheric coefficients.

表六為第二實施例之成像鏡頭2之相關參數值及其對應條件(1)至條件(4)之計算值，由表六可知，第二實施例之成像鏡頭2皆能滿足條件(1)至條件(4)之要求。 Table 6 shows the relevant parameter values of the imaging lens 2 of the second embodiment and the calculated values of the corresponding conditions (1) to (4). It can be seen from Table 6 that the imaging lens 2 of the second embodiment can meet the conditions (1). ) to the requirements of condition (4).

另外，第二實施例之成像鏡頭2的光學性能也可達到要求，由第4A圖可看出，第二實施例之成像鏡頭2其縱向像差介於-0.01mm至0.04mm之間。由第4B圖可看出，第二實施例之成像鏡頭2其場曲介於-0.04mm至0.05mm之間。由第4C圖可看出，第二實施例之成像鏡頭2其畸變介於 -70%至0%之間。 In addition, the optical performance of the imaging lens 2 of the second embodiment can also meet the requirements. It can be seen from FIG. 4A that the longitudinal aberration of the imaging lens 2 of the second embodiment is between -0.01 mm and 0.04 mm. It can be seen from FIG. 4B that the field curvature of the imaging lens 2 of the second embodiment is between -0.04mm and 0.05mm. It can be seen from FIG. 4C that the distortion of the imaging lens 2 of the second embodiment is between -70% to 0%.

顯見第二實施例之成像鏡頭2之縱向像差、場曲、畸變都能被有效修正，從而得到較佳的光學性能。 It is obvious that the longitudinal aberration, field curvature, and distortion of the imaging lens 2 of the second embodiment can be effectively corrected, thereby obtaining better optical performance.

請參閱第5圖，成像鏡頭3沿著一光軸OA3從一物側至一像側依序包括一第一透鏡L31、一第二透鏡L32、一光圈ST3、一第三透鏡L33、一第四透鏡L34、一第五透鏡L35、一濾光片OF3及一保護玻璃CG3。成像時，來自物側之光線最後成像於一成像面IMA3上。根據【實施方式】第一至八段落，其中： Referring to FIG. 5, the imaging lens 3 includes a first lens L31, a second lens L32, an aperture ST3, a third lens L33, a first lens L31, a second lens L32, an aperture ST3, a third lens L33, a first lens Four lenses L34, a fifth lens L35, a filter OF3 and a protective glass CG3. During imaging, the light from the object side is finally imaged on an imaging plane IMA3. According to the first to eighth paragraphs of [Embodiment], wherein:

第四透鏡L34為雙凸透鏡，其像側面S39為凸面；第五透鏡L35為彎月型透鏡，其物側面S310為凹面； The fourth lens L34 is a biconvex lens, and its image side S39 is a convex surface; the fifth lens L35 is a meniscus lens, and its object side S310 is a concave surface;

濾光片OF3其物側面S312與像側面S313皆為平面； The object side S312 and the image side S313 of the filter OF3 are both planes;

保護玻璃CG3其物側面S314與像側面S315皆為平面； The object side S314 and the image side S315 of the protective glass CG3 are both flat surfaces;

利用上述透鏡、光圈ST3及至少滿足條件(1)至條件(4)其中一條件之設計，使得成像鏡頭3能有效的縮短鏡頭總長度、有效的提升解析度、有效的抗環境溫度變化、有效的修正像差。 Using the above-mentioned lens, aperture ST3 and the design that satisfies at least one of the conditions (1) to (4), the imaging lens 3 can effectively shorten the total length of the lens, effectively improve the resolution, effectively resist environmental temperature changes, and effectively corrected aberrations.

表七為第5圖中成像鏡頭3之各透鏡之相關參數表。 Table 7 is a table of relevant parameters of each lens of the imaging lens 3 in Fig. 5 .

表七中非球面透鏡之非球面表面凹陷度z之定義，與第一實施例中表一之非球面透鏡之非球面表面凹陷度z之定義相同，在此皆不加以贅述。 The definition of the aspherical surface concavity z of the aspherical lens in Table 7 is the same as the definition of the aspherical surface concavity z of the aspherical lens in Table 1 in the first embodiment, and will not be repeated here.

表八為表七中非球面透鏡之非球面表面之相關參數表，其中k為圓錐係數(Conic Constant)、A~C為非球面係數。 Table 8 is a table of relevant parameters of the aspheric surface of the aspheric lens in Table 7, where k is the Conic Constant, and A~C are the aspheric coefficients.

表九為第三實施例之成像鏡頭3之相關參數值及其對應條件(1)至條件(4)之計算值，由表九可知，第三實施例之成像鏡頭3皆能滿足條件(1)至條件(4)之要求。 Table 9 shows the relevant parameter values of the imaging lens 3 of the third embodiment and the calculated values of the corresponding conditions (1) to (4). It can be seen from Table 9 that the imaging lens 3 of the third embodiment can meet the conditions (1). ) to the requirements of condition (4).

另外，第三實施例之成像鏡頭3的光學性能也可達到要求，由第6A圖可看出，第三實施例之成像鏡頭3其縱向像差介於-0.001mm至 0.045mm之間。由第6B圖可看出，第三實施例之成像鏡頭3其場曲介於-0.03mm至0.07mm之間。由第6C圖可看出，第三實施例之成像鏡頭3其畸變介於-70%至0%之間。 In addition, the optical performance of the imaging lens 3 of the third embodiment can also meet the requirements. It can be seen from FIG. 6A that the longitudinal aberration of the imaging lens 3 of the third embodiment is between -0.001mm and between 0.045mm. It can be seen from FIG. 6B that the field curvature of the imaging lens 3 of the third embodiment is between -0.03 mm and 0.07 mm. It can be seen from FIG. 6C that the distortion of the imaging lens 3 of the third embodiment is between -70% and 0%.

顯見第三實施例之成像鏡頭3之縱向像差、場曲、畸變都能被有效修正，從而得到較佳的光學性能。 It is obvious that the longitudinal aberration, field curvature, and distortion of the imaging lens 3 of the third embodiment can be effectively corrected, thereby obtaining better optical performance.

雖然本發明已以實施方式揭露如上，然其並非用以限定本發明，任何熟悉此技藝者，在不脫離本發明的精神和範圍內，當可作各種的更動與潤飾，因此本發明的保護範圍當視後附的申請專利範圍所界定者為準。 Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone who is familiar with the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be determined by the scope of the appended patent application.

1:成像鏡頭 1: Imaging lens

L11:第一透鏡 L11: The first lens

L12:第二透鏡 L12: Second lens

ST1:光圈 ST1: Aperture

L13:第三透鏡 L13: Third lens

L14:第四透鏡 L14: Fourth lens

L15:第五透鏡 L15: Fifth lens

OF1:濾光片 OF1: filter

CG1:保護玻璃 CG1: Protective glass

IMA1:成像面 IMA1: Imaging plane

OA1:光軸 OA1: Optical axis

S11:第一透鏡物側面 S11: Object side of the first lens

S12:第一透鏡像側面 S12: The first lens image side

S13:第二透鏡物側面 S13: Object side of the second lens

S14:第二透鏡像側面 S14: The second lens is like the side

S15:光圈面 S15: Aperture Surface

S16:第三透鏡物側面 S16: Object side of the third lens

S17:第三透鏡像側面 S17: The third lens is like the side

S18:第四透鏡物側面 S18: Fourth lens object side

S19:第四透鏡像側面 S19: Fourth lens like side

S110:第五透鏡物側面 S110: Object side of fifth lens

S111:第五透鏡像側面 S111: Fifth lens image side

S112:濾光片物側面 S112: Side of filter object

S113:濾光片像側面 S113: Filter like side

S114:保護玻璃物側面 S114: Protect the side of glass

S115:保護玻璃像側面 S115: Protective glass like side

Claims

一種成像鏡頭，包括： An imaging lens, comprising:

一第一透鏡、一第二透鏡、一第三透鏡、一第四透鏡以及一第五透鏡； a first lens, a second lens, a third lens, a fourth lens and a fifth lens;

其中該第一透鏡為彎月型透鏡具有負屈光力； Wherein the first lens is a meniscus lens with negative refractive power;

其中該第二透鏡為彎月型透鏡具有正屈光力，且包括一凹面朝向一物側以及一凸面朝向一像側； Wherein the second lens is a meniscus lens with positive refractive power, and includes a concave surface facing an object side and a convex surface facing an image side;

其中該第三透鏡為彎月型透鏡具有正屈光力； Wherein the third lens is a meniscus lens with positive refractive power;

其中該第四透鏡具有正屈光力，且包括一凸面朝向該物側； Wherein the fourth lens has positive refractive power and includes a convex surface facing the object side;

其中該第五透鏡具有正屈光力； Wherein the fifth lens has positive refractive power;

其中該第一透鏡、該第二透鏡、該第三透鏡、該第四透鏡以及該第五透鏡沿著一光軸從該物側至該像側依序排列。 The first lens, the second lens, the third lens, the fourth lens and the fifth lens are sequentially arranged along an optical axis from the object side to the image side.

如申請專利範圍第1項所述之成像鏡頭，其中： The imaging lens as described in item 1 of the claimed scope, wherein:

該第一透鏡包括一凸面朝向該物側以及一凹面朝向該像側；以及 The first lens includes a convex surface facing the object side and a concave surface facing the image side; and

該第三透鏡包括一凹面朝向該物側以及一凸面朝向該像側。 The third lens includes a concave surface facing the object side and a convex surface facing the image side.

如申請專利範圍第2項所述之成像鏡頭，其中： The imaging lens as described in item 2 of the claimed scope, wherein:

該第四透鏡為彎月型透鏡，且更包括一凹面朝向該像側；以及 The fourth lens is a meniscus lens, and further includes a concave surface facing the image side; and

該第五透鏡為雙凸透鏡，且包括一凸面朝向該物側以及另一凸面朝向該像側。 The fifth lens is a biconvex lens, and includes a convex surface facing the object side and another convex surface facing the image side.

該第四透鏡為雙凸透鏡，且更包括另一凸面朝向該像側；以及 The fourth lens is a biconvex lens, and further includes another convex surface facing the image side; and

該第五透鏡為彎月型透鏡，且包括一凹面朝向該物側。 The fifth lens is a meniscus lens and includes a concave surface facing the object side.

該第二透鏡包括一非球面表面；以及 the second lens includes an aspheric surface; and

該第五透鏡包括一非球面表面。 The fifth lens includes an aspheric surface.

如申請專利範圍第1項所述之成像鏡頭，其更包括一光圈設置於該第二透鏡與該第三透鏡之間。 The imaging lens of claim 1, further comprising an aperture disposed between the second lens and the third lens.

如申請專利範圍第6項所述之成像鏡頭，其中該成像鏡頭滿足以下條件： The imaging lens as described in item 6 of the patent application scope, wherein the imaging lens satisfies the following conditions:

0.1<ψST/TTL<0.5； 0.1<ψST/TTL<0.5;

其中，ψST為該光圈之一孔徑，TTL為該第一透鏡之一物側面至一成像面於該光軸上之一間距。 Wherein, ψST is an aperture of the aperture, and TTL is a distance on the optical axis from an object side surface of the first lens to an imaging surface.

一種成像鏡頭，包括： An imaging lens, comprising:

其中該第二透鏡為彎月型透鏡具有正屈光力； Wherein the second lens is a meniscus lens with positive refractive power;

其中該第四透鏡具有正屈光力； Wherein the fourth lens has positive refractive power;

其中該第五透鏡具有屈光力為單一透鏡，該第五透鏡與該第四透鏡之間包括一空氣間隔； Wherein the fifth lens has a single lens with refractive power, and an air space is included between the fifth lens and the fourth lens;

其中該第一透鏡、該第二透鏡、該第三透鏡、該第四透鏡以及該第五透鏡沿著一光軸從一物側至該像側依序排列。 The first lens, the second lens, the third lens, the fourth lens and the fifth lens are sequentially arranged along an optical axis from an object side to the image side.

如申請專利範圍第1項至第8項中任一請求項所述之成像鏡頭，其中該成像鏡頭滿足以下條件： The imaging lens according to any one of claims 1 to 8 of the scope of the patent application, wherein the imaging lens satisfies the following conditions:

-3<f₁/f<-1.5； -3<f ₁ /f<-1.5;

其中，f₁為該第一透鏡之一有效焦距，f為該成像鏡頭之一有效焦距。 Wherein, f ₁ is an effective focal length of the first lens, and f is an effective focal length of the imaging lens.

0.5<ET₅/T₅<1.5； 0.5<ET ₅ /T ₅ <1.5;

其中，ET₅為該第五透鏡之一邊緣厚度，T₅為該第五透鏡於該光軸上之一厚度。 Wherein, ET ₅ is an edge thickness of the fifth lens, and T ₅ is a thickness of the fifth lens on the optical axis.

0.3<ψ2/ψ3<0.8； 0.3<ψ2/ψ3<0.8;

其中，ψ2為該第二透鏡之一最大光學有效直徑，ψ3為該第三透鏡之一最大光學有效直徑。 Wherein, ψ2 is a maximum optical effective diameter of the second lens, and ψ3 is a maximum optical effective diameter of the third lens.