TWI747760B - Optical imaging lens, imaging device and electronic device - Google Patents

Optical imaging lens, imaging device and electronic device Download PDF

Info

Publication number
TWI747760B
TWI747760B TW110108510A TW110108510A TWI747760B TW I747760 B TWI747760 B TW I747760B TW 110108510 A TW110108510 A TW 110108510A TW 110108510 A TW110108510 A TW 110108510A TW I747760 B TWI747760 B TW I747760B
Authority
TW
Taiwan
Prior art keywords
lens
optical imaging
lens group
image side
focal length
Prior art date
Application number
TW110108510A
Other languages
Chinese (zh)
Other versions
TW202235947A (en
Inventor
李旭昇
許智程
Original Assignee
紘立光電股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 紘立光電股份有限公司 filed Critical 紘立光電股份有限公司
Priority to TW110108510A priority Critical patent/TWI747760B/en
Application granted granted Critical
Publication of TWI747760B publication Critical patent/TWI747760B/en
Publication of TW202235947A publication Critical patent/TW202235947A/en

Links

Images

Landscapes

  • Lenses (AREA)

Abstract

An optical imaging lens including, from an object side to an image side, an aperture, a first lens, a second lens, a third lens, and a fourth lens. The first lens has negative refractive power and includes an image-side surface being concave. The second lens has positive refractive power and includes an image-side surface being convex. The third lens has positive refractive power and includes an image-side surface being convex. The fourth lens has negative refractive power and includes an object-side surface being concave and an image-side surface being concave. The optical imaging lens includes a total of four elements. Specific conditions are satisfied in order to provide a compact imaging lens having environmental temperature endurance and being capable of capturing high-quality images.

Description

光學取像透鏡組、成像裝置及電子裝置Optical imaging lens group, imaging device and electronic device

本發明係有關於一種光學取像透鏡組及成像裝置，特別是有關適用於車用攝影電子裝置或監控攝影系統之光學取像透鏡組、成像裝置及電子裝置。 The present invention relates to an optical imaging lens group and an imaging device, in particular to an optical imaging lens group, an imaging device and an electronic device suitable for an automotive photographic electronic device or a surveillance camera system.

隨著半導體製程技術的進步，使得影像感測元件的畫素可以達到更微小的尺寸，進而提升了整體影像感測元件的效能。因此，光學成像鏡頭的成像品質也必須持續地提升，以符合現今消費市場的需求。 With the advancement of semiconductor process technology, the pixels of the image sensor device can reach a smaller size, thereby improving the performance of the overall image sensor device. Therefore, the imaging quality of optical imaging lenses must also be continuously improved to meet the needs of the current consumer market.

而隨著消費性電子產品的多元化發展，例如智慧型手機、運動型攝影機、行車記錄器、倒車攝影裝置、及家用監控攝影設備等，光學成像鏡頭的設計要求也更加地多樣化。以車用攝影裝置為例，通常要求光學成像鏡頭具有較佳的環境適應性，例如從溫度較低的寒帶地區到高溫的熱帶地區，配合不同地區與季節的溫度變化，皆需維持穩定的成像品質。此外，由於消費性電子產品的規格體積亦追求輕薄短小，因此，相關零組件包含光學成像鏡頭等，在尺寸上也必須進一步地薄型化。然而，縮小光學成像鏡頭的體積，往往難以同時兼顧視角與成像品質。 With the diversified development of consumer electronic products, such as smartphones, sports cameras, driving recorders, reversing cameras, and home surveillance photography equipment, the design requirements for optical imaging lenses have become more diversified. Taking automotive photography devices as an example, optical imaging lenses are usually required to have better environmental adaptability. For example, from cold regions with low temperatures to high-temperature tropical regions, it is necessary to maintain stable imaging in accordance with temperature changes in different regions and seasons. quality. In addition, as the size and size of consumer electronic products are also pursuing lightness, thinness and shortness, related components including optical imaging lenses, etc., must be further thinned in size. However, reducing the volume of optical imaging lenses often makes it difficult to balance the viewing angle and imaging quality at the same time.

是以，如何提供一種小型化、耐環境氣候變化且具有高成像品質的光學成像鏡頭，實為此技術領域者持續努力的目標。 Therefore, how to provide an optical imaging lens that is miniaturized, resistant to environmental and climate changes, and has high imaging quality is the goal of continuous efforts by those in the technical field.

是以，為解決上述問題，本發明提供一種光學取像透鏡組，由物側至像側依序包含光圈、第一透鏡、第二透鏡、第三透鏡及第四透鏡。其中，第一透鏡具有負屈折力，其像側面為凹面，第一透鏡包含至少一非球面表面，其材質為玻璃；第二透鏡具有正屈折力，其像側面為凸面；第三透鏡具有正屈折力，其像側面為凸面；以及第四透鏡具有負屈折力，其物側面為凹面、像側面為凹面；其中，所述光學取像透鏡組之透鏡總數為四片；第一透鏡之焦距為f1，該第二透鏡之焦距為f2，該第三透鏡之焦距為f3，該第四透鏡之焦距為f4，係滿足以下關係式：1<f1/f4<4；及0.6<f2/f3<1.4。 Therefore, in order to solve the above-mentioned problems, the present invention provides an optical imaging lens assembly, which sequentially includes an aperture, a first lens, a second lens, a third lens, and a fourth lens from the object side to the image side. Wherein, the first lens has negative refractive power, and its image side surface is concave, the first lens includes at least one aspheric surface, and its material is glass; the second lens has positive refractive power, and its image side surface is convex; the third lens has positive Refractive power, the image side surface is convex; and the fourth lens has negative refractive power, the object side surface is concave, the image side surface is concave; wherein, the total number of lenses in the optical imaging lens group is four; the focal length of the first lens Is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, and the focal length of the fourth lens is f4, which satisfies the following relationship: 1<f1/f4<4; and 0.6<f2/f3 <1.4.

根據本發明之一實施例，所述第一透鏡之色散係數為Vd1，第二透鏡之色散係數為Vd2，第三透鏡之色散係數為Vd3，第四透鏡之色散係數為Vd4，係滿足以下關係式：100<Vd1+Vd4<150；及65<Vd2+Vd3<85。 According to an embodiment of the present invention, the dispersion coefficient of the first lens is Vd1, the dispersion coefficient of the second lens is Vd2, the dispersion coefficient of the third lens is Vd3, and the dispersion coefficient of the fourth lens is Vd4, which satisfy the following relationship Formula: 100<Vd1+Vd4<150; and 65<Vd2+Vd3<85.

本發明又提供一種光學取像透鏡組，由物側至像側依序包含光圈、第一透鏡、第二透鏡、第三透鏡及第四透鏡。其中，第一透鏡具有負屈折力，其像側面為凹面，第一透鏡包含至少一非球面表面，其材質為玻璃；第二透鏡具有正屈折力，其像側面為凸面；第三透鏡具有正屈折力，其像側面為凸面；以及第四透鏡具有負屈折力，其物側面為凹面、像側面為凹面；其中，所述光學取像透鏡組之透鏡總數為四片；所述光學取像透鏡組之有效焦距為EFL，所述光圈至光學取像透鏡組之成像面在光軸上之距離為TTL，該第二透鏡之焦距為f2，該第三透鏡之焦距為f3，係滿足以下關係式：0.3<EFL/TTL<0.7；及0.6<f2/f3<1.4。 The present invention also provides an optical imaging lens assembly, which includes an aperture, a first lens, a second lens, a third lens, and a fourth lens in sequence from the object side to the image side. Wherein, the first lens has negative refractive power, and its image side surface is concave, the first lens includes at least one aspheric surface, and its material is glass; the second lens has positive refractive power, and its image side surface is convex; the third lens has positive Refractive power, the image side is convex; and the fourth lens has negative refractive power, the object side is concave, the image side is concave; wherein the total number of lenses in the optical imaging lens group is four; the optical imaging The effective focal length of the lens group is EFL, the distance from the aperture to the imaging surface of the optical imaging lens group on the optical axis is TTL, the focal length of the second lens is f2, and the focal length of the third lens is f3, which satisfies the following Relational formula: 0.3<EFL/TTL<0.7; and 0.6<f2/f3<1.4.

根據本發明之一實施例，所述第一透鏡與第二透鏡之組合焦距為f12，光學取像透鏡組之有效焦距為EFL，係滿足以下關係式：0.7<f12/EFL<1.9。 According to an embodiment of the present invention, the combined focal length of the first lens and the second lens is f12, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: 0.7<f12/EFL<1.9.

根據本發明之一實施例，所述第一透鏡之焦距為f1，整體光學取像透鏡組之有效焦距為EFL，係滿足以下關係式：-2.6<f1/EFL<-1.1。 According to an embodiment of the present invention, the focal length of the first lens is f1, and the effective focal length of the overall optical imaging lens group is EFL, which satisfies the following relationship: -2.6<f1/EFL<-1.1.

根據本發明之一實施例，所述第三透鏡之焦距為f3，整體光學取像透鏡組之有效焦距為EFL，係滿足以下關係式：0.6<f3/EFL<1.2。 According to an embodiment of the present invention, the focal length of the third lens is f3, and the effective focal length of the overall optical imaging lens group is EFL, which satisfies the following relationship: 0.6<f3/EFL<1.2.

根據本發明之一實施例，所述第一透鏡物側面之曲率半徑為R1、像側面之曲率半徑為R2，係滿足以下關係式：2<R1/R2<6.5。 According to an embodiment of the present invention, the radius of curvature of the object side surface of the first lens is R1 and the radius of curvature of the image side surface is R2, which satisfies the following relationship: 2<R1/R2<6.5.

根據本發明之一實施例，所述第一透鏡、第二透鏡、第三透鏡及第四透鏡在光軸上之厚度和為ΣCT，而所述第一透鏡物側面至第四透鏡像側面在光軸上之距離為Dr1r8，係滿足以下關係式：0.65<ΣCT/Dr1r8<0.95。 According to an embodiment of the present invention, the sum of the thicknesses of the first lens, the second lens, the third lens, and the fourth lens on the optical axis is ΣCT, and the object side of the first lens to the image side of the fourth lens are at The distance on the optical axis is Dr1r8, which satisfies the following relationship: 0.65<ΣCT/Dr1r8<0.95.

根據本發明之一實施例，所述第二透鏡物側面之曲率半徑為R3、像側面之曲率半徑為R4，係滿足以下關係式：-1.3<(R3+R4)/(R4-R3)<-0.3。 According to an embodiment of the present invention, the curvature radius of the object side surface of the second lens is R3, and the curvature radius of the image side surface is R4, which satisfies the following relationship: -1.3<(R3+R4)/(R4-R3)< -0.3.

根據本發明之一實施例，所述第三透鏡物側面之曲率半徑為R5、像側面之曲率半徑為R6，係滿足以下關係式：-1.2<(R5+R6)/(R6-R5)<0。 According to an embodiment of the present invention, the curvature radius of the object side surface of the third lens is R5, and the curvature radius of the image side surface is R6, which satisfies the following relationship: -1.2<(R5+R6)/(R6-R5)< 0.

根據本發明之一實施例，所述第四透鏡像側面至光學取像透鏡組之成像面在光軸上之距離為BFL，而所述光圈至光學取像透鏡組之成像面在光軸上之距離為TTL，係滿足以下關係式：0.2<BFL/TTL<0.6。 According to an embodiment of the present invention, the distance from the image side surface of the fourth lens to the imaging surface of the optical imaging lens group on the optical axis is BFL, and the distance from the aperture to the imaging surface of the optical imaging lens group is on the optical axis The distance is TTL, which satisfies the following relationship: 0.2<BFL/TTL<0.6.

根據本發明之一實施例，所述第一透鏡在光軸上之厚度為CT1，而所述光圈至光學取像透鏡組之成像面在光軸上之距離為TTL，係滿足以下關係式：14<TTL/CT1<25。 According to an embodiment of the present invention, the thickness of the first lens on the optical axis is CT1, and the distance from the aperture to the imaging surface of the optical imaging lens group on the optical axis is TTL, which satisfies the following relationship: 14<TTL/CT1<25.

本發明更提供一種成像裝置，其包含如前述之光學取像透鏡組及一影像感測元件，其中，所述影像感測元件設置於光學取像透鏡組之成像面。 The present invention further provides an imaging device, which includes the aforementioned optical imaging lens group and an image sensing element, wherein the image sensing element is disposed on the imaging surface of the optical imaging lens group.

本發明進一步提供一種電子裝置，其包含如前述之成像裝置及一近紅外線發射元件，所述近紅外線發射元件設置於成像裝置旁，用以朝向被攝物發射近紅外線光束，使所述成像裝置得以利用被攝物表面反射之近紅外線光束擷取影像。 The present invention further provides an electronic device, which includes the aforementioned imaging device and a near-infrared emitting element. The near-infrared emitting element is arranged next to the imaging device and used to emit a near-infrared beam toward a subject to make the imaging device The near-infrared beam reflected from the surface of the subject can be used to capture images.

10、20、30、40、50、60、70、80:光學取像透鏡組 10, 20, 30, 40, 50, 60, 70, 80: optical imaging lens group

11、21、31、41、51、61、71、81:第一透鏡 11, 21, 31, 41, 51, 61, 71, 81: the first lens

12、22、32、42、52、62、72、82:第二透鏡 12, 22, 32, 42, 52, 62, 72, 82: second lens

13、23、33、43、53、63、73、83:第三透鏡 13, 23, 33, 43, 53, 63, 73, 83: third lens

14、24、34、44、54、64、74、84:第四透鏡 14, 24, 34, 44, 54, 64, 74, 84: fourth lens

15、25、35、45、55、65、75、85:濾光元件 15, 25, 35, 45, 55, 65, 75, 85: filter element

16、26、36、46、56、66、76、86:保護玻璃 16, 26, 36, 46, 56, 66, 76, 86: protective glass

17、27、37、47、57、67、77、87:成像面 17, 27, 37, 47, 57, 67, 77, 87: imaging surface

11a、21a、31a、41a、51a、61a、71a、81a:第一透鏡之物側面 11a, 21a, 31a, 41a, 51a, 61a, 71a, 81a: the object side of the first lens

11b、21b、31b、41b、51b、61b、71b、81b:第一透鏡之像側面 11b, 21b, 31b, 41b, 51b, 61b, 71b, 81b: the image side of the first lens

12a、22a、32a、42a、52a、62a、72a、82a:第二透鏡之物側面 12a, 22a, 32a, 42a, 52a, 62a, 72a, 82a: the object side of the second lens

12b、22b、32b、42b、52b、62b、72b、82b:第二透鏡之像側面 12b, 22b, 32b, 42b, 52b, 62b, 72b, 82b: the image side of the second lens

13a、23a、33a、43a、53a、63a、73a、83a:第三透鏡之物側面 13a, 23a, 33a, 43a, 53a, 63a, 73a, 83a: the object side of the third lens

13b、23b、33b、43b、53b、63b、73b、83b:第三透鏡之像側面 13b, 23b, 33b, 43b, 53b, 63b, 73b, 83b: the image side of the third lens

14a、24a、34a、44a、54a、64a、74a、84a:第四透鏡之物側面 14a, 24a, 34a, 44a, 54a, 64a, 74a, 84a: the object side of the fourth lens

14b、24b、34b、44b、54b、64b、74b、84b:第四透鏡之像側面 14b, 24b, 34b, 44b, 54b, 64b, 74b, 84b: the image side of the fourth lens

15a、15b、25a、25b、35a、35b、45a、45b、55a、55b、65a、65b、75a、75b、85a、85b:濾光元件之二表面 15a, 15b, 25a, 25b, 35a, 35b, 45a, 45b, 55a, 55b, 65a, 65b, 75a, 75b, 85a, 85b: the second surface of the filter element

16a、16b、26a、26b、36a、36b、46a、46b、56a、56b、66a、66b、76a、76b、86a、86b:保護玻璃之二表面 16a, 16b, 26a, 26b, 36a, 36b, 46a, 46b, 56a, 56b, 66a, 66b, 76a, 76b, 86a, 86b: two surfaces of protective glass

100、200、300、400、500、600、700、800:影像感測元件 100, 200, 300, 400, 500, 600, 700, 800: image sensor

1000:電子裝置 1000: Electronic device

1010:成像裝置 1010: imaging device

1020:近紅外線發射元件 1020: Near infrared emitting element

I:光軸 I: Optical axis

ST:光圈 ST: Aperture

〔圖1A〕為本發明第一實施例之光學取像透鏡組示意圖；〔圖1B〕由左至右依序為本發明第一實施例之縱向球差圖、像散場曲像差圖及畸變像差圖；〔圖2A〕為本發明第二實施例之光學取像透鏡組示意圖；〔圖2B〕由左至右依序為本發明第二實施例之縱向球差圖、像散場曲像差圖及畸變像差圖；〔圖3A〕為本發明第三實施例之光學取像透鏡組示意圖；〔圖3B〕由左至右依序為本發明第三實施例之縱向球差圖、像散場曲像差圖及畸變像差圖；〔圖4A〕為本發明第四實施例之光學取像透鏡組示意圖；〔圖4B〕由左至右依序為本發明第四實施例之縱向球差圖、像散場曲像差圖及畸變像差圖；〔圖5A〕為本發明第五實施例之光學取像透鏡組示意圖；〔圖5B〕由左至右依序為本發明第五實施例之縱向球差圖、像散場曲像差圖及畸變像差圖；〔圖6A〕為本發明第六實施例之光學取像透鏡組示意圖； 〔圖6B〕由左至右依序為本發明第六實施例之縱向球差圖、像散場曲像差圖及畸變像差圖；〔圖7A〕為本發明第七實施例之光學取像透鏡組示意圖；〔圖7B〕由左至右依序為本發明第七實施例之縱向球差圖、像散場曲像差圖及畸變像差圖；〔圖8A〕為本發明第八實施例之光學取像透鏡組示意圖；〔圖8B〕由左至右依序為本發明第八實施例之縱向球差圖、像散場曲像差圖及畸變像差圖；及〔圖9〕為本發明第十實施例之電子裝置的示意圖。 [Fig. 1A] is a schematic diagram of the optical imaging lens assembly of the first embodiment of the present invention; [Fig. 1B] is the longitudinal spherical aberration diagram, astigmatic field curvature aberration diagram and distortion of the first embodiment of the present invention in order from left to right Aberration diagram; [FIG. 2A] is a schematic diagram of the optical imaging lens group of the second embodiment of the present invention; [FIG. 2B] is the longitudinal spherical aberration diagram and astigmatic field curvature of the second embodiment of the present invention in order from left to right Aberration diagrams and distortion diagrams; [FIG. 3A] is a schematic diagram of the optical imaging lens set of the third embodiment of the present invention; [FIG. 3B] is the longitudinal spherical aberration diagrams of the third embodiment of the present invention in order from left to right, Astigmatic field curvature aberration diagram and distortion aberration diagram; [FIG. 4A] is a schematic diagram of the optical imaging lens group of the fourth embodiment of the present invention; [FIG. 4B] is the longitudinal direction of the fourth embodiment of the present invention in order from left to right Spherical aberration diagram, astigmatic field curvature aberration diagram, and distortion aberration diagram; [FIG. 5A] is a schematic diagram of the optical imaging lens set of the fifth embodiment of the present invention; [FIG. 5B] is the fifth embodiment of the present invention from left to right The longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the embodiment; [FIG. 6A] is a schematic diagram of the optical imaging lens group of the sixth embodiment of the present invention; [FIG. 6B] From left to right are longitudinal spherical aberration diagrams, astigmatic field curvature aberration diagrams, and distortion aberration diagrams of the sixth embodiment of the present invention; [FIG. 7A] is the optical image capturing diagram of the seventh embodiment of the present invention Schematic diagram of the lens group; [FIG. 7B] From left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the seventh embodiment of the present invention in order; [FIG. 8A] is the eighth embodiment of the present invention Schematic diagram of the optical imaging lens group; [Figure 8B] from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram and the distortion aberration diagram of the eighth embodiment of the present invention; and [Figure 9] is this The schematic diagram of the electronic device of the tenth embodiment of the invention.

在以下實施例中，光學取像透鏡組之各透鏡可為玻璃或塑膠材質，而不以實施例所列舉之材質為限。當透鏡材質為玻璃時，透鏡表面可透過研磨方式或模造的方式進行加工；此外，由於玻璃材質本身耐溫度變化及高硬度特性，可以減輕環境變化對光學取像透鏡組的影響，進而延長光學取像透鏡組的使用壽命。當透鏡材質為塑膠時，則有利於減輕光學取像透鏡組的重量，及降低生產成本。 In the following embodiments, each lens of the optical imaging lens group can be made of glass or plastic materials, and is not limited to the materials listed in the embodiments. When the lens material is glass, the lens surface can be processed by grinding or molding; in addition, due to the temperature change and high hardness of the glass material itself, the impact of environmental changes on the optical imaging lens group can be reduced, thereby extending the optical The service life of the imaging lens group. When the lens material is plastic, it is beneficial to reduce the weight of the optical imaging lens group and reduce the production cost.

在本發明之實施例中，每一個透鏡皆包含朝向被攝物之一物側面，及朝向成像面之一像側面。每一個透鏡的表面形狀係依據所述表面靠近光軸區域(近軸處)的形狀加以定義，例如描述一個透鏡之物側面為凸面時，係表示該透鏡在靠近光軸區域的物側面為凸面，亦即，雖然在實施例中描述該透鏡表面為凸面，而該表面在遠離光軸區域(離軸處)可能是凸面或凹面。每一個透鏡近軸處的形狀係以該面之曲率半徑為正值或負值加以判斷，例如，若一個透鏡之物 側面曲率半徑為正值時，則該物側面為凸面；反之，若其曲率半徑為負值，則該物側面為凹面。就一個透鏡之像側面而言，若其曲率半徑為正值，則該像側面為凹面；反之，若其曲率半徑為負值，則該像側面為凸面。 In the embodiment of the present invention, each lens includes an object side facing the object and an image side facing the imaging surface. The surface shape of each lens is defined according to the shape of the area near the optical axis (paraxial) of the surface. For example, when the object side of a lens is described as convex, it means that the object side of the lens near the optical axis is convex. That is, although the lens surface is described as a convex surface in the embodiment, the surface may be convex or concave in the region away from the optical axis (off-axis). The shape of each lens near the axis is judged based on the positive or negative value of the radius of curvature of the surface, for example, if the object of a lens When the radius of curvature of the side surface is positive, the side surface of the object is convex; conversely, if the radius of curvature is negative, the side surface of the object is concave. As for the image side surface of a lens, if its radius of curvature is positive, the image side surface is concave; conversely, if its radius of curvature is negative, the image side surface is convex.

在本發明之實施例中，每一透鏡的物側面及像側面可以是球面或非球面表面。在透鏡上使用非球面表面有助於修正如球面像差等光學取像透鏡組的成像像差，減少光學透鏡元件的使用數量。然而，使用非球面透鏡會使整體光學取像透鏡組的成本提高。雖然在本發明之實施例中，有些光學透鏡的表面係使用球面表面，但仍可以視需要將其設計為非球面表面；或者，有些光學透鏡的表面係使用非球面表面，但仍可以視需要將其設計為球面表面。 In the embodiment of the present invention, the object side surface and the image side surface of each lens may be spherical or aspherical surfaces. The use of an aspheric surface on the lens helps correct the imaging aberrations of the optical imaging lens group such as spherical aberration, and reduces the number of optical lens elements used. However, the use of an aspheric lens increases the cost of the overall optical imaging lens group. Although in the embodiments of the present invention, the surface of some optical lenses uses a spherical surface, it can still be designed as an aspheric surface if necessary; or, the surface of some optical lenses uses an aspheric surface, but it can still be designed as needed. Design it as a spherical surface.

在本發明之實施例中，光學取像透鏡組之總長TTL(Total Track Length)定義為此光學取像透鏡組之光圈至成像面在光軸上之距離。。此光學取像透鏡組之成像高度稱為最大像高ImgH(Image Height)；當成像面上設置一影像感測元件時，最大像高ImgH代表影像感測元件的有效感測區域對角線長度之一半。在以下實施例中，所有透鏡的曲率半徑、透鏡厚度、透鏡之間的距離、透鏡組長度TTL、最大像高ImgH和焦距(Focal Length)的單位皆以公厘(mm)加以表示。 In the embodiment of the present invention, the total track length (TTL) of the optical imaging lens group is defined as the distance from the aperture of the optical imaging lens group to the imaging surface on the optical axis. . The imaging height of this optical imaging lens group is called the maximum image height ImgH (Image Height); when an image sensor element is installed on the imaging surface, the maximum image height ImgH represents the diagonal length of the effective sensing area of the image sensor element Half. In the following embodiments, the units of curvature radius of all lenses, lens thickness, distance between lenses, lens group length TTL, maximum image height ImgH, and focal length (Focal Length) are all expressed in millimeters (mm).

本發明提供一種光學取像透鏡組，由物側至像側依序包含光圈、第一透鏡、第二透鏡、第三透鏡及第四透鏡。此光學取像透鏡組之透鏡總數為四片。 The invention provides an optical imaging lens group, which includes an aperture, a first lens, a second lens, a third lens, and a fourth lens in sequence from the object side to the image side. The total number of lenses in this optical imaging lens group is four.

第一透鏡具有負屈折力，其像側面為凹面；較佳地，第一透鏡之物側面為凸面。藉此，可提高收光範圍，擴大光學取像透鏡組之成像視角。 The first lens has negative refractive power, and its image side surface is concave; preferably, the object side surface of the first lens is convex. In this way, the light receiving range can be increased, and the imaging angle of view of the optical imaging lens group can be expanded.

第二透鏡具有正屈折力，其像側面為凸面。第二透鏡主要用以匯聚光線，調整入射光線行進的方向。第一透鏡及第二透鏡分別具有負、正屈折力，有助於修正光學取像透鏡組之場曲像差及球面像差。 The second lens has positive refractive power, and its image side surface is convex. The second lens is mainly used to converge the light and adjust the direction of the incident light. The first lens and the second lens have negative and positive refractive powers, respectively, which help correct the curvature of field aberration and spherical aberration of the optical imaging lens group.

第三透鏡具有正屈折力，其像側面為凸面。本發明將光學取像透鏡組之正屈折力適當地分配至第二透鏡及第三透鏡，可以降低使用單一透鏡的屈折力負擔，平緩每一透鏡表面的彎曲度，降低成像像差。 The third lens has positive refractive power, and its image side surface is convex. The present invention appropriately distributes the positive refractive power of the optical imaging lens group to the second lens and the third lens, which can reduce the refractive power burden of using a single lens, smooth the curvature of each lens surface, and reduce imaging aberrations.

第四透鏡具有負屈折力，其物側面為凹面、像側面為凹面。本發明之第三透鏡與第四透鏡亦分別具有正、負屈折力，且第三透鏡像側面與第四透鏡物側面為凸、凹相對，有利於進一步修正場曲像差及球面像差。 The fourth lens has negative refractive power, its object side surface is concave, and the image side surface is concave. The third lens and the fourth lens of the present invention also have positive and negative refractive powers respectively, and the image side surface of the third lens and the object side surface of the fourth lens are convex and concave opposite, which is beneficial to further correct the curvature of field and spherical aberration.

較佳地，所述光學取像透鏡組之第一透鏡具有至少一非球面表面，且其材質為玻璃，例如是由模造玻璃所構成。藉此，有助於修正光學取像透鏡組之成像像差，提高光學成像品質。 Preferably, the first lens of the optical imaging lens group has at least one aspheric surface, and its material is glass, for example, made of molded glass. Thereby, it is helpful to correct the imaging aberration of the optical imaging lens group and improve the optical imaging quality.

所述光學取像透鏡組之第一透鏡之焦距為f1，第四透鏡之焦距為f4，係滿足以下關係式：1<f1/f4<4； (1) The focal length of the first lens of the optical imaging lens group is f1, and the focal length of the fourth lens is f4, which satisfies the following relationship: 1<f1/f4<4; (1)

藉由滿足關係式(1)之條件，有助於控制第一透鏡與第四透鏡之屈折力比例，使所述光學取像透鏡組具有適當的體積大小與成像像高。 By satisfying the condition of the relational formula (1), it is helpful to control the refractive power ratio of the first lens and the fourth lens, so that the optical imaging lens group has an appropriate volume size and imaging image height.

較佳地，所述光學取像透鏡組之第一透鏡之色散係數為Vd1，第二透鏡之色散係數為Vd2，第三透鏡之色散係數為Vd3，第四透鏡之色散係數為Vd4，係滿足以下關係式：100<Vd1+Vd4<150； (2)及65<Vd2+Vd3<85； (3) Preferably, the dispersion coefficient of the first lens of the optical imaging lens group is Vd1, the dispersion coefficient of the second lens is Vd2, the dispersion coefficient of the third lens is Vd3, and the dispersion coefficient of the fourth lens is Vd4, which satisfies The following relationship: 100<Vd1+Vd4<150; (2) and 65<Vd2+Vd3<85; (3)

藉由滿足關係式(2)及(3)之條件，有助於選擇適當之透鏡材料，藉由搭配第一透鏡至第四透鏡不同之色散特性，可以有效地修正光學取像透鏡組之色像差。 By satisfying the conditions of relational expressions (2) and (3), it is helpful to select the appropriate lens material. By matching the different dispersion characteristics of the first lens to the fourth lens, the color of the optical imaging lens group can be effectively corrected Aberration.

所述光學取像透鏡組之有效焦距為EFL，光圈至光學取像透鏡組之成像面在光軸上之距離為TTL，係滿足以下關係式：0.3<EFL/TTL<0.7； (4) The effective focal length of the optical imaging lens group is EFL, and the distance from the aperture to the imaging surface of the optical imaging lens group on the optical axis is TTL, which satisfies the following relationship: 0.3<EFL/TTL<0.7; (4)

藉由滿足關係式(4)之條件，有利於縮小光學取像透鏡組的體積，同時保有良好的光學性能。 By satisfying the condition of relation (4), it is beneficial to reduce the volume of the optical imaging lens group while maintaining good optical performance.

所述光學取像透鏡組之第二透鏡之焦距為f2，第三透鏡之焦距為f3，係滿足以下關係式：0.6<f2/f3<1.4； (5) The focal length of the second lens of the optical imaging lens group is f2, and the focal length of the third lens is f3, which satisfies the following relationship: 0.6<f2/f3<1.4; (5)

藉由滿足關係式(5)之條件，有助於適當地將光學取像透鏡組之正屈折力分配至第二透鏡及第三透鏡。當f2/f3低於關係式(5)之下限值時，所形成之光學取像透鏡組的有效焦距易變短；當f2/f3高於關係式(5)之上限值時，則造成球面像差不易修正，影響成像品質。 By satisfying the condition of relational expression (5), it is helpful to appropriately distribute the positive refractive power of the optical imaging lens group to the second lens and the third lens. When f2/f3 is lower than the lower limit of relation (5), the effective focal length of the formed optical imaging lens group is easily shortened; when f2/f3 is higher than the upper limit of relation (5), then The spherical aberration is not easy to correct, which affects the imaging quality.

所述光學取像透鏡組之第一透鏡與第二透鏡之組合焦距為f12，而整體光學取像透鏡組之有效焦距為EFL，係滿足以下關係式：0.7<f12/EFL<1.9； (6) The combined focal length of the first lens and the second lens of the optical imaging lens group is f12, and the effective focal length of the overall optical imaging lens group is EFL, which satisfies the following relationship: 0.7<f12/EFL<1.9; (6) )

藉由滿足關係式(6)之條件，可以調整光學取像透鏡組前二片透鏡之組合焦距為正屈折力，有利於光學取像透鏡組體積小型化及避免後焦距過長。 By satisfying the condition of relation (6), the combined focal length of the first two lenses of the optical imaging lens group can be adjusted to a positive refractive power, which is beneficial to miniaturization of the optical imaging lens group and avoiding excessively long back focal length.

所述光學取像透鏡組之第一透鏡之焦距為f1，光學取像透鏡組之有效焦距為EFL，係滿足以下關係式：-2.6<f1/EFL<-1.1； (7) The focal length of the first lens of the optical imaging lens group is f1, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: -2.6<f1/EFL<-1.1; (7)

藉由滿足關係式(7)之條件，可以進一步控制所述第一透鏡的焦距大小，當f1/EFL低於關係式(7)之下限值時，易造成第一透鏡的負屈折力不 足，較不利於修正像差；當f1/EFL高於關係式(7)之上限值時，易使整體光學取像透鏡組的光學有效半徑加大，不利於小型化。 By satisfying the condition of relation (7), the focal length of the first lens can be further controlled. When f1/EFL is lower than the lower limit of relation (7), the negative refractive power of the first lens is likely to be insufficient. When f1/EFL is higher than the upper limit of the relationship (7), it is easy to increase the effective optical radius of the overall optical imaging lens group, which is not conducive to miniaturization.

所述光學取像透鏡組之第三透鏡的焦距為f3，光學取像透鏡組之有效焦距為EFL，係滿足以下關係式：0.6<f3/EFL<1.2； (8) The focal length of the third lens of the optical imaging lens group is f3, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: 0.6<f3/EFL<1.2; (8)

藉由滿足關係式(8)之條件，可以進一步控制所述第三透鏡的焦距大小，f3/EFL之數值高於或低於關係式(8)之上下限，皆不利於修正成像像差。 By satisfying the condition of the relation (8), the focal length of the third lens can be further controlled. The value of f3/EFL is higher or lower than the upper and lower limits of the relation (8), which is not conducive to correcting the imaging aberration.

所述光學取像透鏡組之第一透鏡物側面之曲率半徑為R1、像側面之曲率半徑為R2，係滿足以下關係式：2<R1/R2<6.5； (9) The curvature radius of the object side surface of the first lens of the optical imaging lens group is R1, and the curvature radius of the image side surface is R2, which satisfies the following relationship: 2<R1/R2<6.5; (9)

藉由滿足關係式(9)之條件，可以增加光學取像透鏡組的收光範圍，使光學取像透鏡組具有適當之成像視角。 By satisfying the condition of relational expression (9), the light collection range of the optical imaging lens group can be increased, so that the optical imaging lens group has an appropriate imaging angle of view.

所述光學取像透鏡組之第一透鏡、第二透鏡、第三透鏡及第四透鏡在光軸上之厚度和為ΣCT，而所述第一透鏡物側面至第四透鏡像側面在光軸上之距離為Dr1r8，係滿足以下關係式：0.65<ΣCT/Dr1r8<0.95； (10) The sum of the thicknesses of the first lens, second lens, third lens, and fourth lens of the optical imaging lens group on the optical axis is ΣCT, and the object side of the first lens to the image side of the fourth lens are on the optical axis The distance above is Dr1r8, which satisfies the following relationship: 0.65<ΣCT/Dr1r8<0.95; (10)

藉由滿足關係式(10)之條件，有利於控制光學取像透鏡組的總長度，使光學取像透鏡組可以符合消費型電子產品小型化之要求。 By satisfying the condition of relational expression (10), it is beneficial to control the total length of the optical imaging lens group, so that the optical imaging lens group can meet the miniaturization requirements of consumer electronic products.

所述光學取像透鏡組之第二透鏡物側面之曲率半徑為R3、像側面之曲率半徑為R4，係滿足以下關係式：-1.3<(R3+R4)/(R4-R3)<-0.3； (11) The curvature radius of the object side surface of the second lens of the optical imaging lens group is R3, and the curvature radius of the image side surface is R4, which satisfies the following relationship: -1.3<(R3+R4)/(R4-R3)<-0.3 ; (11)

藉由滿足關係式(11)之條件，可以使第二透鏡具有適當之透鏡形狀，有利於降低成像像差。 By satisfying the condition of the relational formula (11), the second lens can have an appropriate lens shape, which is beneficial to reduce imaging aberrations.

所述光學取像透鏡組之第三透鏡物側面之曲率半徑為R5、像側面之曲率半徑為R6，係滿足以下關係式：-1.2<(R5+R6)/(R6-R5)<0； (12) The curvature radius of the object side surface of the third lens of the optical imaging lens group is R5, and the curvature radius of the image side surface is R6, which satisfies the following relationship: -1.2<(R5+R6)/(R6-R5)<0; (12)

藉由滿足關係式(12)之條件，可以使第三透鏡具有適當之透鏡形狀，有利於降低成像像差。 By satisfying the condition of the relational formula (12), the third lens can have an appropriate lens shape, which is beneficial to reduce imaging aberrations.

所述光學取像透鏡組之第四透鏡像側面至光學取像透鏡組之成像面在光軸上之距離為BFL，光圈至光學取像透鏡組之成像面在光軸上之距離為TTL，係滿足以下關係式：0.2<BFL/TTL<0.6； (13) The distance from the image side surface of the fourth lens of the optical imaging lens group to the imaging surface of the optical imaging lens group on the optical axis is BFL, and the distance from the aperture to the imaging surface of the optical imaging lens group on the optical axis is TTL, The system satisfies the following relationship: 0.2<BFL/TTL<0.6; (13)

藉由滿足關係式(13)之條件，可以使光學取像透鏡組具有適當之後焦距，有利於提升成像品質。 By satisfying the condition of relation (13), the optical imaging lens group can have a proper back focal length, which is beneficial to improve the imaging quality.

所述光學取像透鏡組之第一透鏡在光軸上之厚度為CT1，光圈至光學取像透鏡組之成像面在光軸上之距離為TTL，係滿足以下關係式：14<TTL/CT1<25； (14) The thickness of the first lens of the optical imaging lens group on the optical axis is CT1, and the distance from the aperture to the imaging surface of the optical imaging lens group on the optical axis is TTL, which satisfies the following relationship: 14<TTL/CT1 <25; (14)

藉由滿足關係式(14)之條件，可以控制整體成像透鏡組的總長度與第一透鏡在光軸上之厚度的比例，有助於進一步地維持成像透鏡組的小型化。 By satisfying the condition of relation (14), the ratio of the total length of the entire imaging lens group to the thickness of the first lens on the optical axis can be controlled, which helps to further maintain the miniaturization of the imaging lens group.

第一實施例The first embodiment

參見圖1A及圖1B，圖1A為本發明第一實施例之光學取像透鏡組之示意圖。圖1B由左至右依序為本發明第一實施例之縱向球差圖 (Longitudinal Spherical Aberration)、像散場曲像差圖(Astigmatism/Field Curvature)及畸變像差圖(Distortion)。 Referring to FIGS. 1A and 1B, FIG. 1A is a schematic diagram of the optical imaging lens assembly according to the first embodiment of the present invention. Figure 1B shows the longitudinal spherical aberration diagram of the first embodiment of the present invention in order from left to right (Longitudinal Spherical Aberration), Astigmatism/Field Curvature and Distortion.

如圖1A所示，第一實施例之光學取像透鏡組10由物側至像側依序包含光圈ST、第一透鏡11、第二透鏡12、第三透鏡13及第四透鏡14。此光學取像透鏡組10更可包含濾光元件15、保護玻璃16及成像面17。在成像面17上更可設置一影像感測元件100，以構成一成像裝置(未另標號)。 As shown in FIG. 1A, the optical imaging lens group 10 of the first embodiment includes an aperture ST, a first lens 11, a second lens 12, a third lens 13 and a fourth lens 14 in sequence from the object side to the image side. The optical imaging lens group 10 can further include a filter element 15, a protective glass 16 and an imaging surface 17. An image sensing element 100 can be further provided on the imaging surface 17 to form an imaging device (not marked separately).

第一透鏡11具有負屈折力，其物側面11a為凸面、像側面11b為凹面，且其物側面11a及像側面11b皆為非球面；其中，物側面11a在近軸處為凸面、離軸處為凹面。第一透鏡11之材質為玻璃。 The first lens 11 has a negative refractive power, the object side surface 11a is convex, the image side surface 11b is concave, and the object side surface 11a and the image side surface 11b are both aspherical. Among them, the object side surface 11a is convex at the paraxial and off-axis. The place is concave. The material of the first lens 11 is glass.

第二透鏡12具有正屈折力，其物側面12a為凸面、像側面12b為凸面，且其物側面12a及像側面12b皆為球面。第二透鏡12之材質為玻璃。 The second lens 12 has a positive refractive power, the object side surface 12a is convex, the image side surface 12b is convex, and both the object side surface 12a and the image side surface 12b are spherical surfaces. The material of the second lens 12 is glass.

第三透鏡13具有正屈折力，其物側面13a為凸面，其像側面13b為凸面，且其物側面13a及像側面13b皆為球面。第三透鏡之材質為玻璃。 The third lens 13 has a positive refractive power, its object side surface 13a is convex, its image side surface 13b is convex, and its object side surface 13a and image side surface 13b are spherical surfaces. The material of the third lens is glass.

第四透鏡14具有負屈折力，其物側面14a為凹面，其像側面14b為凹面，且其物側面14a及像側面14b皆為球面。第四透鏡之材質為玻璃。 The fourth lens 14 has a negative refractive power, its object side surface 14a is concave, its image side surface 14b is concave, and its object side surface 14a and image side surface 14b are spherical surfaces. The material of the fourth lens is glass.

濾光元件15設置於第四透鏡14與成像面17之間，用以濾除特定波長區段的光線。濾光元件15之二表面15a、15b皆為平面，其材質為玻璃。 The filter element 15 is disposed between the fourth lens 14 and the imaging surface 17 to filter out light in a specific wavelength range. Both surfaces 15a and 15b of the filter element 15 are flat surfaces, and the material is glass.

保護玻璃16設置於影像感測元件100之上，其二表面16a、16b皆為平面，其材質為玻璃。 The protective glass 16 is disposed on the image sensor 100, and its two surfaces 16a, 16b are both flat surfaces, and its material is glass.

影像感測元件(Image Sensor)100例如是電荷耦合元件影像感測元件(Charge-Coupled Device(CCD)Image Sensor)或互補式金屬氧化半導體感測元件(CMOS Image Sensor)。 The image sensor 100 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a complementary metal oxide semiconductor sensor (CMOS Image Sensor).

上述各個非球面之曲線方程式表示如下：

Figure 110108510-A0305-02-0014-1
The curve equation of each aspheric surface mentioned above is expressed as follows:
Figure 110108510-A0305-02-0014-1

其中，X：非球面上距離光軸為Y的點與非球面於光軸上之切面間的距離；Y：非球面上的點與光軸間之垂直距離；R：透鏡於近光軸處的曲率半徑；K：錐面係數；以及Ai：第i階非球面係數。 Among them, X: the distance between the point Y on the aspheric surface from the optical axis and the tangent surface of the aspheric surface on the optical axis; Y: the vertical distance between the point on the aspheric surface and the optical axis; R: the lens at the near optical axis The radius of curvature of; K: the conical coefficient; and Ai: the i-th aspheric coefficient.

請參見下方表一，其為本發明第一實施例之光學取像透鏡組10的詳細光學數據。其中，第一透鏡11之物側面11a標示為表面11a、像側面11b標示為表面11b，其他各透鏡表面則依此類推。表中距離欄位的數值代表該表面至下一表面在光軸I上的距離，例如第一透鏡11之物側面11a至像側面11b之距離為0.5mm，代表第一透鏡11在光軸上之厚度為0.5mm。第一透鏡11之像側面11b至第二透鏡物側面12a之距離為0.446mm。其它可依此類推，以下不再重述。 Please refer to Table 1 below, which is the detailed optical data of the optical imaging lens group 10 according to the first embodiment of the present invention. Among them, the object side surface 11a of the first lens 11 is labeled as the surface 11a, the image side surface 11b is labeled as the surface 11b, and the other lens surfaces are deduced by analogy. The value in the distance column in the table represents the distance from the surface to the next surface on the optical axis I. For example, the distance from the object side 11a to the image side 11b of the first lens 11 is 0.5 mm, which means that the first lens 11 is on the optical axis. The thickness is 0.5mm. The distance from the image side surface 11b of the first lens 11 to the object side surface 12a of the second lens is 0.446 mm. Others can be deduced by analogy, and will not be repeated below.

第一實施例中，光學取像透鏡組10之有效焦距為EFL，光圈值(F-number)為Fno，整體光學取像透鏡組10最大視角之一半為HFOV(Half Field of View)，光圈ST至成像面18在光軸I上之距離為TTL，在成像面18上影像感測元件100有效感測區域對角線之一半為最大像高ImgH，其數值如下：EFL=4.29mm，Fno=2.09，TTL=8.52mm，HFOV=33.4度，ImgH=2.5mm。 In the first embodiment, the effective focal length of the optical imaging lens group 10 is EFL, the aperture value (F-number) is Fno, half of the maximum viewing angle of the overall optical imaging lens group 10 is HFOV (Half Field of View), and the aperture ST The distance to the imaging surface 18 on the optical axis I is TTL, and half of the diagonal of the effective sensing area of the image sensor 100 on the imaging surface 18 is the maximum image height ImgH, and its value is as follows: EFL=4.29mm, Fno= 2.09, TTL=8.52mm, HFOV=33.4 degrees, ImgH=2.5mm.

Figure 110108510-A0305-02-0014-2
Figure 110108510-A0305-02-0014-2
Figure 110108510-A0305-02-0015-3
Figure 110108510-A0305-02-0015-3

請參見下方表二，其為本發明第一實施例之第一透鏡11各表面的非球面係數。其中，K為非球面曲線方程式中的錐面係數，A4至A16則代表各表面第4階至第16階非球面係數。例如第一透鏡11之物側面11a之錐面係數K為-59.7。其它可依此類推，以下不再重述。此外，以下各實施例的表格係對應至各實施例之光學取像透鏡組，各表格的定義係與本實施例相同，故在以下實施例中不再加以贅述。 Please refer to Table 2 below, which shows the aspheric coefficients of each surface of the first lens 11 in the first embodiment of the present invention. Among them, K is the conical surface coefficient in the aspheric curve equation, and A 4 to A 16 represent the 4th to 16th order aspheric coefficients of each surface. For example, the cone coefficient K of the object side surface 11a of the first lens 11 is -59.7. Others can be deduced by analogy, and will not be repeated below. In addition, the tables of the following embodiments correspond to the optical imaging lens sets of the embodiments, and the definition of each table is the same as that of this embodiment, so it will not be repeated in the following embodiments.

Figure 110108510-A0305-02-0015-4
Figure 110108510-A0305-02-0015-4

第一實施例中，所述第一透鏡11的焦距f1與第四透鏡14的焦距f4之間的關係式為f1/f4=1.70。 In the first embodiment, the relationship between the focal length f1 of the first lens 11 and the focal length f4 of the fourth lens 14 is f1/f4=1.70.

第一實施例中，所述第一透鏡11之色散係數Vd1、第二透鏡12之色散係數Vd2、第三透鏡13之色散係數Vd3及第四透鏡14之色散係數Vd4之間的關係式為Vd1+Vd4=142.7，Vd2+Vd3=68.7。 In the first embodiment, the relationship between the dispersion coefficient Vd1 of the first lens 11, the dispersion coefficient Vd2 of the second lens 12, the dispersion coefficient Vd3 of the third lens 13, and the dispersion coefficient Vd4 of the fourth lens 14 is Vd1 +Vd4=142.7, Vd2+Vd3=68.7.

第一實施例中，所述光學取像透鏡組10之有效焦距EFL與光圈ST至光學取像透鏡組10之成像面17在光軸I上之距離TTL，二者間之關係式為EFL/TTL=0.5。 In the first embodiment, the effective focal length EFL of the optical imaging lens group 10 and the distance TTL from the aperture ST to the imaging surface 17 of the optical imaging lens group 10 on the optical axis I, the relationship between the two is EFL/ TTL=0.5.

第一實施例中，所述第二透鏡12的焦距f2與第三透鏡13的焦距f3之間的關係式為f2/f3=0.84。 In the first embodiment, the relationship between the focal length f2 of the second lens 12 and the focal length f3 of the third lens 13 is f2/f3=0.84.

第一實施例中，所述第一透鏡11與第二透鏡12之組合焦距f12，與整體光學取像透鏡組10之有效焦距間EFL之關係式為f12/EFL=1.33。 In the first embodiment, the relationship between the combined focal length f12 of the first lens 11 and the second lens 12 and the effective focal length of the overall optical imaging lens group 10 is f12/EFL=1.33.

第一實施例中，所述第一透鏡11的焦距f1，與整體光學取像透鏡組10之有效焦距間EFL之關係式為f1/EFL=-1.64。 In the first embodiment, the relationship between the focal length f1 of the first lens 11 and the effective focal length of the overall optical imaging lens group 10 is f1/EFL=-1.64.

第一實施例中，所述第三透鏡13的焦距f3，與整體光學取像透鏡組10之有效焦距間EFL之關係式為f3/EFL=1.0。 In the first embodiment, the relationship between the focal length f3 of the third lens 13 and the effective focal length of the overall optical imaging lens group 10 is f3/EFL=1.0.

第一實施例中，所述第一透鏡11物側面11a之曲率半徑R1，與其像側面11b之曲率半徑R2之間的關係式為R1/R2=2.91。 In the first embodiment, the relationship between the curvature radius R1 of the object side surface 11a of the first lens 11 and the curvature radius R2 of the image side surface 11b is R1/R2=2.91.

第一實施例中，所述第一透鏡11、第二透鏡12、第三透鏡13及第四透鏡14在光軸I上之厚度和ΣCT，與第一透鏡11之物側面11a至第四透鏡14像側面14b在光軸I上之距離Dr1r8，二者間之關係式為ΣCT/Dr1r8=0.82。 In the first embodiment, the thickness and ΣCT of the first lens 11, the second lens 12, the third lens 13, and the fourth lens 14 on the optical axis I are the same as the object side 11a to the fourth lens of the first lens 11 14 The distance Dr1r8 between the image side 14b on the optical axis I, and the relationship between the two is ΣCT/Dr1r8=0.82.

第一實施例中，所述第二透鏡12物側面12a之曲率半徑R3、像側面12b之曲率半徑R4間之關係式為(R3+R4)/(R4-R3)=-0.56。 In the first embodiment, the relationship between the curvature radius R3 of the object side surface 12a of the second lens 12 and the curvature radius R4 of the image side surface 12b is (R3+R4)/(R4-R3)=-0.56.

第一實施例中，所述第三透鏡13物側面13a之曲率半徑R5、像側面13b之曲率半徑R6間之關係式為(R5+R6)/(R6-R5)=-0.39。 In the first embodiment, the relationship between the radius of curvature R5 of the object side surface 13a of the third lens 13 and the radius of curvature R6 of the image side surface 13b is (R5+R6)/(R6-R5)=-0.39.

第一實施例中，所述第四透鏡14像側面14b至光學取像透鏡組10之成像面17在光軸I上之距離BFL，與光圈ST至光學取像透鏡組10之成像面17在光軸I上之距離TTL之關係式為BFL/TTL=0.36。 In the first embodiment, the distance BFL from the image side surface 14b of the fourth lens 14 to the imaging surface 17 of the optical imaging lens group 10 on the optical axis I is in line with the aperture ST to the imaging surface 17 of the optical imaging lens group 10 The relational expression of the distance TTL on the optical axis I is BFL/TTL=0.36.

第一實施例中，所述光圈ST至光學取像透鏡組10之成像面17在光軸I上之距離TTL，與第一透鏡11在光軸I上之厚度CT1之關係式為TTL/CT1=17.04。 In the first embodiment, the distance TTL from the aperture ST to the imaging surface 17 of the optical imaging lens group 10 on the optical axis I is TTL, and the relationship between the thickness CT1 of the first lens 11 on the optical axis I is TTL/CT1 = 17.04.

由上述的關係式數值可知，第一實施例之光學取像透鏡組10滿足關係式(1)至(14)的要求。 It can be seen from the above-mentioned relational expression values that the optical imaging lens group 10 of the first embodiment satisfies the requirements of relational expressions (1) to (14).

參見圖1B，圖中由左至右分別為光學取像透鏡組10之縱向球差圖、像散場曲像差圖及畸變像差圖。由縱向球差圖可以看出，三種近紅外線950nm、960nm、970nm波長在不同高度的離軸光線皆可集中於成像點附近，其成像點偏差可以控制在±0.02mm以內。由像散場曲像差圖(波長960nm)可以看出，弧矢方向的像差在整個視場範圍內的焦距變化量在±0.02mm以內；子午方向的像差在整個視場範圍內的焦距變化量在±0.02mm以內；而畸變像差可以控制在15%以內。如圖1B所示，本實施例之光學取像透鏡組10已良好地修正了各項像差，符合光學系統的成像品質要求。 Referring to FIG. 1B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical imaging lens group 10 from left to right. It can be seen from the longitudinal spherical aberration diagram that the three types of near-infrared 950nm, 960nm, 970nm wavelengths of off-axis light at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.02mm. From the astigmatic field curvature aberration diagram (wavelength 960nm), it can be seen that the focal length change of the sagittal aberration in the entire field of view is within ±0.02mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.02mm; and the distortion aberration can be controlled within 15%. As shown in FIG. 1B, the optical imaging lens assembly 10 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

第二實施例Second embodiment

參見圖2A及圖2B，圖2A為本發明第二實施例之光學取像透鏡組20之示意圖。圖2B由左至右依序為本發明第二實施例之縱向球差圖(Longitudinal Spherical Aberration)、像散場曲像差圖(Astigmatism/Field Curvature)及畸變像差圖(Distortion)。 2A and 2B, FIG. 2A is a schematic diagram of the optical imaging lens group 20 according to the second embodiment of the present invention. FIG. 2B shows the longitudinal spherical aberration (Longitudinal Spherical Aberration), the astigmatism/Field Curvature (Astigmatism/Field Curvature) and the distortion aberration (Distortion) of the second embodiment of the present invention in order from left to right.

如圖2A所示，第二實施例之光學取像透鏡組20由物側至像側依序包含光圈ST、第一透鏡21、第二透鏡22、第三透鏡23及第四透鏡24。此光學取像透鏡組20更可包含濾光元件25、保護玻璃26及成像面27。在成像面27上更可設置一影像感測元件200，以構成一成像裝置(未另標號)。 As shown in FIG. 2A, the optical imaging lens group 20 of the second embodiment includes an aperture ST, a first lens 21, a second lens 22, a third lens 23, and a fourth lens 24 in sequence from the object side to the image side. The optical imaging lens group 20 can further include a filter element 25, a protective glass 26 and an imaging surface 27. An image sensing element 200 can be further provided on the imaging surface 27 to form an imaging device (not marked separately).

第一透鏡21具有負屈折力，其物側面21a為凸面、像側面21b為凹面，且其物側面21a及像側面21b皆為非球面；其中，物側面21a在近軸處為凸面、離軸處為凹面。第一透鏡21之材質為玻璃。 The first lens 21 has a negative refractive power, the object side 21a is convex, the image side 21b is concave, and both the object side 21a and the image side 21b are aspherical. Among them, the object side 21a is convex at the paraxial and off-axis. The place is concave. The material of the first lens 21 is glass.

第二透鏡22具有正屈折力，其物側面22a為凸面、像側面22b為凸面，且其物側面22a及像側面22b皆為球面。第二透鏡22之材質為玻璃。 The second lens 22 has a positive refractive power, the object side 22a is convex, the image side 22b is convex, and both the object side 22a and the image side 22b are spherical. The material of the second lens 22 is glass.

第三透鏡23具有正屈折力，其物側面23a為凹面，其像側面23b為凸面，且其物側面23a及像側面23b皆為球面。第三透鏡23之材質為玻璃。 The third lens 23 has a positive refractive power, its object side surface 23a is concave, its image side surface 23b is convex, and its object side surface 23a and image side surface 23b are spherical surfaces. The material of the third lens 23 is glass.

第四透鏡24具有負屈折力，其物側面24a為凹面、像側面24b為凹面，且其物側面24a及像側面24b皆為球面。第四透鏡24之材質為玻璃。 The fourth lens 24 has a negative refractive power, the object side surface 24a is concave, the image side surface 24b is concave, and the object side surface 24a and the image side surface 24b are spherical surfaces. The material of the fourth lens 24 is glass.

濾光元件25設置於第四透鏡24與成像面27之間，用以濾除特定波長區段的光線。濾光元件25之二表面25a、25b皆為平面，其材質為玻璃。 The filter element 25 is disposed between the fourth lens 24 and the imaging surface 27 to filter out light in a specific wavelength range. The two surfaces 25a, 25b of the filter element 25 are both flat surfaces, and the material is glass.

保護玻璃26設置於影像感測元件200之上，其二表面26a、26b皆為平面，其材質為玻璃。 The protective glass 26 is disposed on the image sensing element 200, and its two surfaces 26a, 26b are both flat surfaces, and its material is glass.

影像感測元件(Image Sensor)200例如是電荷耦合元件影像感測元件(Charge-Coupled Device(CCD)Image Sensor)或互補式金屬氧化半導體影像感測元件(CMOS Image Sensor)。 The image sensor 200 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

第二實施例之光學取像透鏡組20之詳細光學數據及透鏡表面之非球面係數分別列於表三及表四。在第二實施例中，非球面之曲線方程式表示如第一實施例的形式。 The detailed optical data and the aspheric coefficient of the lens surface of the optical imaging lens group 20 of the second embodiment are listed in Table 3 and Table 4, respectively. In the second embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

Figure 110108510-A0305-02-0019-5
Figure 110108510-A0305-02-0019-5

Figure 110108510-A0305-02-0019-6
Figure 110108510-A0305-02-0019-6
Figure 110108510-A0305-02-0020-7
Figure 110108510-A0305-02-0020-7

在第二實施例中，光學取像透鏡組20之各關係式的數值列於表五。由表五可知，第二實施例之光學取像透鏡組20滿足關係式(1)至(14)的要求。 In the second embodiment, the numerical values of the relational expressions of the optical imaging lens group 20 are listed in Table 5. It can be seen from Table 5 that the optical imaging lens group 20 of the second embodiment satisfies the requirements of relational expressions (1) to (14).

Figure 110108510-A0305-02-0020-8
Figure 110108510-A0305-02-0020-8

參見圖2B，圖中由左至右分別為光學取像透鏡組20之縱向球差圖、像散場曲像差圖及畸變像差圖。由縱向球差圖可以看出，三種近紅外線950nm、960nm、970nm波長在不同高度的離軸光線皆可集中於成像點附近，其成像點偏差可以控制在±0.03mm以內。由像散場曲像差圖(波長960nm)可以看出，弧矢方向的像差在整個視場範圍內的焦距變化量在±0.03mm以內；子午方向的像差在整個視場範圍內的焦距變化量在±0.03mm以內；而畸變像差可以控制在3%以內。如圖2B所示，本實施例之光學取像透鏡組20已良好地修正了各項像差，符合光學系統的成像品質要求。 2B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical imaging lens group 20, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of near-infrared 950nm, 960nm, 970nm wavelengths of off-axis light at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.03mm. It can be seen from the astigmatic field curvature aberration diagram (wavelength 960nm) that the focal length change of the sagittal aberration in the entire field of view is within ±0.03mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.03mm; and the distortion aberration can be controlled within 3%. As shown in FIG. 2B, the optical imaging lens group 20 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

第三實施例The third embodiment

參見圖3A及圖3B，圖3A為本發明第三實施例之光學取像透鏡組30之示意圖。圖3B由左至右依序為本發明第三實施例之縱向球差圖(Longitudinal Spherical Aberration)、像散場曲像差圖(Astigmatism/Field Curvature)及畸變像差圖(Distortion)。 Referring to FIGS. 3A and 3B, FIG. 3A is a schematic diagram of an optical imaging lens group 30 according to a third embodiment of the present invention. Fig. 3B shows the longitudinal spherical aberration (Longitudinal Spherical Aberration), the astigmatism/Field Curvature (Astigmatism/Field Curvature) and the distortion aberration (Distortion) of the third embodiment of the present invention in order from left to right.

如圖3A所示，第三實施例之光學取像透鏡組30由物側至像側依序包含光圈ST、第一透鏡31、第二透鏡32、第三透鏡33及第四透鏡34。此光學取像透鏡組30更可包含濾光元件35、保護玻璃36及成像面37。在成像面37上更可設置一影像感測元件300，以構成一成像裝置(未另標號)。 As shown in FIG. 3A, the optical imaging lens group 30 of the third embodiment includes an aperture ST, a first lens 31, a second lens 32, a third lens 33, and a fourth lens 34 in sequence from the object side to the image side. The optical imaging lens group 30 can further include a filter element 35, a protective glass 36 and an imaging surface 37. An image sensing element 300 can be further provided on the imaging surface 37 to form an imaging device (not marked separately).

第一透鏡31具有負屈折力，其物側面31a為凸面、像側面31b為凹面，且其物側面31a及像側面31b皆為非球面；其中，物側面31a在近軸處為凸面、離軸處為凹面。第一透鏡31之材質為玻璃。 The first lens 31 has a negative refractive power, the object side 31a is convex, the image side 31b is concave, and both the object side 31a and the image side 31b are aspherical. Among them, the object side 31a is convex at the paraxial and off-axis. The place is concave. The material of the first lens 31 is glass.

第二透鏡32具有正屈折力，其物側面32a為凹面、像側面32b為凸面，且其物側面32a及像側面32b皆為球面。第二透鏡32之材質為玻璃。 The second lens 32 has a positive refractive power, the object side surface 32a is a concave surface, the image side surface 32b is a convex surface, and the object side surface 32a and the image side surface 32b are both spherical surfaces. The material of the second lens 32 is glass.

第三透鏡33具有正屈折力，其物側面33a為凸面，其像側面33b為凸面，且其物側面33a及像側面33b皆為球面。第三透鏡33之材質為玻璃。 The third lens 33 has a positive refractive power, its object side surface 33a is convex, its image side surface 33b is convex, and its object side surface 33a and image side surface 33b are spherical surfaces. The material of the third lens 33 is glass.

第四透鏡34具有負屈折力，其物側面34a為凹面、像側面34b為凹面，且其物側面34a及像側面34b皆為球面。第四透鏡34之材質為玻璃。 The fourth lens element 34 has a negative refractive power, the object side surface 34a is concave, the image side surface 34b is concave, and the object side surface 34a and the image side surface 34b are spherical surfaces. The material of the fourth lens 34 is glass.

濾光元件35設置於第四透鏡34與成像面37之間，用以濾除特定波長區段的光線。濾光元件35之二表面35a、35b皆為平面，其材質為玻璃。 The filter element 35 is disposed between the fourth lens 34 and the imaging surface 37 to filter out light in a specific wavelength range. Both surfaces 35a and 35b of the filter element 35 are flat surfaces, and the material is glass.

保護玻璃36設置於影像感測元件300之上，其二表面36a、36b皆為平面，其材質為玻璃。 The protective glass 36 is disposed on the image sensing element 300, and its two surfaces 36a, 36b are flat surfaces, and the material is glass.

影像感測元件(Image Sensor)300例如是電荷耦合元件影像感測元件(Charge-Coupled Device(CCD)Image Sensor)或互補式金屬氧化半導體影像感測元件(CMOS Image Sensor)。 The image sensor 300 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

第三實施例之光學取像透鏡組30之詳細光學數據及透鏡表面之非球面係數分別列於表六及表七。在第三實施例中，非球面之曲線方程式表示如第一實施例的形式。 The detailed optical data and the aspheric coefficient of the lens surface of the optical imaging lens group 30 of the third embodiment are listed in Table 6 and Table 7, respectively. In the third embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

Figure 110108510-A0305-02-0022-9
Figure 110108510-A0305-02-0022-9

Figure 110108510-A0305-02-0022-10
Figure 110108510-A0305-02-0022-10
Figure 110108510-A0305-02-0023-12
Figure 110108510-A0305-02-0023-12

在第三實施例中，光學取像透鏡組30之各關係式的數值列於表八。由表八可知，第三實施例之光學取像透鏡組30滿足關係式(1)至(14)的要求。 In the third embodiment, the numerical values of the relational expressions of the optical imaging lens group 30 are listed in Table 8. It can be seen from Table 8 that the optical imaging lens group 30 of the third embodiment satisfies the requirements of relational expressions (1) to (14).

Figure 110108510-A0305-02-0023-13
Figure 110108510-A0305-02-0023-13

參見圖3B，圖中由左至右分別為光學取像透鏡組30之縱向球差圖、像散場曲像差圖及畸變像差圖。由縱向球差圖可以看出，三種近紅外線950nm、960nm、970nm波長在不同高度的離軸光線皆可集中於成像點附近，其成像點偏差可以控制在±0.02mm以內。由像散場曲像差圖(波長960nm)可以看出，弧矢方向的像差在整個視場範圍內的焦距變化量在±0.02mm以內；子午方向的像差在整個視場範圍內的焦距變化量在±0.04mm以內；而畸變像差可以控制在10%以內。如圖3B所示，本實施例之光學取像透鏡組30已良好地修正了各項像差，符合光學系統的成像品質要求。 Referring to FIG. 3B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical imaging lens group 30, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of near-infrared 950nm, 960nm, 970nm wavelengths of off-axis light at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.02mm. From the astigmatic field curvature aberration diagram (wavelength 960nm), it can be seen that the focal length change of the sagittal aberration in the entire field of view is within ±0.02mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.04mm; and the distortion aberration can be controlled within 10%. As shown in FIG. 3B, the optical imaging lens group 30 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

第四實施例Fourth embodiment

參見圖4A及圖4B，圖4A為本發明第四實施例之光學取像透鏡組40之示意圖。圖4B由左至右依序為本發明第四實施例之縱向球差圖(Longitudinal Spherical Aberration)、像散場曲像差圖(Astigmatism/Field Curvature)及畸變像差圖(Distortion)。 Referring to FIGS. 4A and 4B, FIG. 4A is a schematic diagram of an optical imaging lens group 40 according to a fourth embodiment of the present invention. FIG. 4B shows the longitudinal spherical aberration (Longitudinal Spherical Aberration), the astigmatism/Field Curvature (Astigmatism/Field Curvature) and the distortion aberration (Distortion) of the fourth embodiment of the present invention in order from left to right.

如圖4A所示，第四實施例之光學取像透鏡組40由物側至像側依序包含光圈ST、第一透鏡41、第二透鏡42、第三透鏡43及第四透鏡44。此光學取像透鏡組40更可包含濾光元件45、保護玻璃46及成像面47。在成像面47上更可設置一影像感測元件400，以構成一成像裝置(未另標號)。 As shown in FIG. 4A, the optical imaging lens group 40 of the fourth embodiment includes an aperture ST, a first lens 41, a second lens 42, a third lens 43 and a fourth lens 44 in sequence from the object side to the image side. The optical imaging lens group 40 can further include a filter element 45, a protective glass 46 and an imaging surface 47. An image sensing element 400 can be further provided on the imaging surface 47 to form an imaging device (not marked separately).

第一透鏡41具有負屈折力，其物側面41a為凸面、像側面41b為凹面，且其物側面41a及像側面41b皆為非球面；其中，物側面41a在近軸處為凸面、離軸處為凹面。第一透鏡41之材質為玻璃。 The first lens 41 has a negative refractive power, the object side 41a is convex, the image side 41b is concave, and both the object side 41a and the image side 41b are aspherical. Among them, the object side 41a is convex at the paraxial and off-axis. The place is concave. The material of the first lens 41 is glass.

第二透鏡42具有正屈折力，其物側面42a為凸面、像側面42b為凸面，且其物側面42a及像側面42b皆為球面。第二透鏡42之材質為玻璃。 The second lens 42 has a positive refractive power, the object side 42a is convex, the image side 42b is convex, and both the object side 42a and the image side 42b are spherical. The material of the second lens 42 is glass.

第三透鏡43具有正屈折力，其物側面43a為凸面，其像側面43b為凸面，且其物側面43a及像側面43b皆為球面。第三透鏡43之材質為玻璃。 The third lens 43 has a positive refractive power, its object side surface 43a is convex, its image side surface 43b is convex, and its object side surface 43a and image side surface 43b are spherical surfaces. The material of the third lens 43 is glass.

第四透鏡44具有負屈折力，其物側面44a為凹面、像側面44b為凹面，且其物側面44a及像側面44b皆為球面。第四透鏡44之材質為玻璃。 The fourth lens 44 has a negative refractive power, the object side 44a is concave, the image side 44b is concave, and both the object side 44a and the image side 44b are spherical surfaces. The material of the fourth lens 44 is glass.

濾光元件45設置於第四透鏡44與成像面47之間，用以濾除特定波長區段的光線。濾光元件45之二表面45a、45b皆為平面，其材質為玻璃。 The filter element 45 is disposed between the fourth lens 44 and the imaging surface 47 to filter out light in a specific wavelength range. Both surfaces 45a and 45b of the filter element 45 are flat surfaces, and the material is glass.

保護玻璃46設置於影像感測元件400之上，其二表面46a、46b皆為平面，其材質為玻璃。 The protective glass 46 is disposed on the image sensing element 400, and its two surfaces 46a, 46b are flat surfaces, and the material is glass.

影像感測元件(Image Sensor)400例如是電荷耦合元件影像感測元件(Charge-Coupled Device(CCD)Image Sensor)或互補式金屬氧化半導體影像感測元件(CMOS Image Sensor)。 The image sensor 400 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

第四實施例之光學取像透鏡組40之詳細光學數據及透鏡表面之非球面係數分別列於表九及表十。在第四實施例中，非球面之曲線方程式表示如第一實施例的形式。 The detailed optical data and the aspheric coefficient of the lens surface of the optical imaging lens group 40 of the fourth embodiment are listed in Table 9 and Table 10, respectively. In the fourth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

Figure 110108510-A0305-02-0025-14
Figure 110108510-A0305-02-0025-14

Figure 110108510-A0305-02-0025-15
Figure 110108510-A0305-02-0025-15
Figure 110108510-A0305-02-0026-16
Figure 110108510-A0305-02-0026-16

在第四實施例中，光學取像透鏡組40之各關係式的數值列於表十一。由表十一可知，第四實施例之光學取像透鏡組40滿足關係式(1)至(14)的要求。 In the fourth embodiment, the numerical values of the relational expressions of the optical imaging lens group 40 are listed in Table 11. It can be seen from Table 11 that the optical imaging lens group 40 of the fourth embodiment satisfies the requirements of relational expressions (1) to (14).

Figure 110108510-A0305-02-0026-17
Figure 110108510-A0305-02-0026-17

參見圖4B，圖中由左至右分別為光學取像透鏡組40之縱向球差圖、像散場曲像差圖及畸變像差圖。由縱向球差圖可以看出，三種近紅外線950nm、960nm、970nm波長在不同高度的離軸光線皆可集中於成像點附近，其成像點偏差可以控制在±0.02mm以內。由像散場曲像差圖(波長960nm)可以看出，弧矢方向的像差在整個視場範圍內的焦距變化量在±0.02mm以內；子午方向的像差在整個視場範圍內的焦距變化量在±0.05mm以內；而畸變像差可以控制在5%以內。如圖4B所示，本實施例之光學取像透鏡組40已良好地修正了各項像差，符合光學系統的成像品質要求。 4B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical imaging lens group 40 from left to right. It can be seen from the longitudinal spherical aberration diagram that the three types of near-infrared 950nm, 960nm, 970nm wavelengths of off-axis light at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.02mm. From the astigmatic field curvature aberration diagram (wavelength 960nm), it can be seen that the focal length change of the sagittal aberration in the entire field of view is within ±0.02mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.05mm; and the distortion aberration can be controlled within 5%. As shown in FIG. 4B, the optical imaging lens assembly 40 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

第五實施例Fifth embodiment

參見圖5A及圖5B，圖5A為本發明第五實施例之光學取像透鏡組50之示意圖。圖5B由左至右依序為本發明第五實施例之縱向球差圖(Longitudinal Spherical Aberration)、像散場曲像差圖(Astigmatism/Field Curvature)及畸變像差圖(Distortion)。 Referring to FIG. 5A and FIG. 5B, FIG. 5A is a schematic diagram of an optical imaging lens assembly 50 according to a fifth embodiment of the present invention. Fig. 5B shows the longitudinal spherical aberration (Longitudinal Spherical Aberration), the astigmatism/Field Curvature (Astigmatism/Field Curvature) and the distortion aberration (Distortion) of the fifth embodiment of the present invention in order from left to right.

如圖5A所示，第五實施例之光學取像透鏡組50由物側至像側依序包含光圈ST、第一透鏡51、第二透鏡52、第三透鏡53及第四透鏡54。此光學取像透鏡組50更可包含濾光元件55、保護玻璃56及成像面57。在成像面57上更可設置一影像感測元件500，以構成一成像裝置(未另標號)。 As shown in FIG. 5A, the optical imaging lens group 50 of the fifth embodiment includes an aperture ST, a first lens 51, a second lens 52, a third lens 53 and a fourth lens 54 in sequence from the object side to the image side. The optical imaging lens group 50 can further include a filter element 55, a protective glass 56 and an imaging surface 57. An image sensing element 500 can be further provided on the imaging surface 57 to form an imaging device (not shown).

第一透鏡51具有負屈折力，其物側面51a為凸面、像側面51b為凹面，且其物側面51a及像側面51b皆為非球面；其中，物側面51a在近軸處為凸面、離軸處為凹面。第一透鏡51之材質為玻璃。 The first lens 51 has a negative refractive power. Its object side surface 51a is convex, image side surface 51b is concave surface, and its object side surface 51a and image side surface 51b are both aspherical. The place is concave. The material of the first lens 51 is glass.

第二透鏡52具有正屈折力，其物側面52a為凸面、像側面52b為凸面，且其物側面52a及像側面52b皆為球面。第二透鏡52之材質為玻璃。 The second lens 52 has a positive refractive power, the object side surface 52a is convex, the image side surface 52b is convex, and the object side surface 52a and the image side surface 52b are both spherical surfaces. The material of the second lens 52 is glass.

第三透鏡53具有正屈折力，其物側面53a為凸面，其像側面53b為凸面，且其物側面53a及像側面53b皆為球面。第三透鏡53之材質為玻璃。 The third lens 53 has a positive refractive power, its object side surface 53a is convex, its image side surface 53b is convex, and its object side surface 53a and image side surface 53b are spherical surfaces. The material of the third lens 53 is glass.

第四透鏡54具有負屈折力，其物側面54a為凹面、像側面54b為凹面，且其物側面54a及像側面54b皆為球面。第四透鏡54之材質為玻璃。 The fourth lens 54 has a negative refractive power, the object side 54a is concave, the image side 54b is concave, and both the object side 54a and the image side 54b are spherical. The material of the fourth lens 54 is glass.

濾光元件55設置於第四透鏡54與成像面57之間，用以濾除特定波長區段的光線。濾光元件55之二表面55a、55b皆為平面，其材質為玻璃。 The filter element 55 is disposed between the fourth lens 54 and the imaging surface 57 to filter out light in a specific wavelength range. Both surfaces 55a and 55b of the filter element 55 are flat surfaces, and the material is glass.

保護玻璃56設置於影像感測元件500之上，其二表面56a、56b皆為平面，其材質為玻璃。 The protective glass 56 is disposed on the image sensing element 500, and its two surfaces 56a, 56b are flat surfaces, and the material is glass.

影像感測元件(Image Sensor)500例如是電荷耦合元件影像感測元件(Charge-Coupled Device(CCD)Image Sensor)或互補式金屬氧化半導體影像感測元件(CMOS Image Sensor)。 The image sensor 500 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

第五實施例之光學取像透鏡組50之詳細光學數據及透鏡表面之非球面係數分別列於表十二及表十三。在第五實施例中，非球面之曲線方程式表示如第一實施例的形式。 The detailed optical data and the aspheric coefficient of the lens surface of the optical imaging lens group 50 of the fifth embodiment are listed in Table 12 and Table 13, respectively. In the fifth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

Figure 110108510-A0305-02-0028-18
Figure 110108510-A0305-02-0028-18

Figure 110108510-A0305-02-0028-19
Figure 110108510-A0305-02-0028-19
Figure 110108510-A0305-02-0029-21
Figure 110108510-A0305-02-0029-21

在第五實施例中，光學取像透鏡組50之各關係式的數值列於表十四。由表十四可知，第五實施例之光學取像透鏡組50滿足關係式(1)至(14)的要求。 In the fifth embodiment, the numerical values of the relational expressions of the optical imaging lens group 50 are listed in Table 14. It can be seen from Table 14 that the optical imaging lens group 50 of the fifth embodiment satisfies the requirements of relational expressions (1) to (14).

Figure 110108510-A0305-02-0029-22
Figure 110108510-A0305-02-0029-22

參見圖5B，圖中由左至右分別為光學取像透鏡組50之縱向球差圖、像散場曲像差圖及畸變像差圖。由縱向球差圖可以看出，三種近紅外線950nm、960nm、970nm波長在不同高度的離軸光線皆可集中於成像點附近，其成像點偏差可以控制在±0.02mm以內。由像散場曲像差圖(波長960nm)可以看出，弧矢方向的像差在整個視場範圍內的焦距變化量在±0.02mm以內；子午方向的像差在整個視場範圍內的焦距變化量在±0.02mm以內；而畸變像差可以控制在10%以內。如圖5B所示，本實施例之光學取像透鏡組50已良好地修正了各項像差，符合光學系統的成像品質要求。 Referring to FIG. 5B, from left to right, the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical imaging lens group 50 are respectively shown from left to right. It can be seen from the longitudinal spherical aberration diagram that the three types of near-infrared 950nm, 960nm, 970nm wavelengths of off-axis light at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.02mm. From the astigmatic field curvature aberration diagram (wavelength 960nm), it can be seen that the focal length change of the sagittal aberration in the entire field of view is within ±0.02mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.02mm; and the distortion aberration can be controlled within 10%. As shown in FIG. 5B, the optical imaging lens assembly 50 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system.

第六實施例Sixth embodiment

參見圖6A及圖6B，圖6A為本發明第六實施例之光學取像透鏡組60之示意圖。圖6B由左至右依序為本發明第六實施例之縱向球差圖(Longitudinal Spherical Aberration)、像散場曲像差圖(Astigmatism/Field Curvature)及畸變像差圖(Distortion)。 Referring to FIGS. 6A and 6B, FIG. 6A is a schematic diagram of an optical imaging lens group 60 according to a sixth embodiment of the present invention. Fig. 6B shows the longitudinal spherical aberration (Longitudinal Spherical Aberration), the astigmatism/Field Curvature (Astigmatism/Field Curvature) and the distortion aberration (Distortion) of the sixth embodiment of the present invention in order from left to right.

如圖6A所示，第六實施例之光學取像透鏡組60由物側至像側依序包含光圈ST、第一透鏡61、第二透鏡62、第三透鏡63及第四透鏡64。此光學取像透鏡組60更可包含濾光元件65、保護玻璃66及成像面67。在成像面67上更可設置一影像感測元件600，以構成一成像裝置(未另標號)。 As shown in FIG. 6A, the optical imaging lens group 60 of the sixth embodiment includes an aperture ST, a first lens 61, a second lens 62, a third lens 63 and a fourth lens 64 in sequence from the object side to the image side. The optical imaging lens group 60 can further include a filter element 65, a protective glass 66 and an imaging surface 67. An image sensing element 600 can be further provided on the imaging surface 67 to form an imaging device (not shown).

第一透鏡61具有負屈折力，其物側面61a為凸面、像側面61b為凹面，且其物側面61a及像側面61b皆為非球面；其中，物側面61a在近軸處為凸面、離軸處為凹面。第一透鏡61之材質為玻璃。 The first lens 61 has a negative refractive power, its object side 61a is convex, image side 61b is concave, and its object side 61a and image side 61b are both aspherical; wherein, the object side 61a is convex at the paraxial and off-axis The place is concave. The material of the first lens 61 is glass.

第二透鏡62具有正屈折力，其物側面62a為凸面、像側面62b為凸面，且其物側面62a及像側面62b皆為球面。第二透鏡62之材質為玻璃。 The second lens 62 has a positive refractive power, the object side 62a is convex, the image side 62b is convex, and both the object side 62a and the image side 62b are spherical. The material of the second lens 62 is glass.

第三透鏡63具有正屈折力，其物側面63a為凸面，其像側面63b為凸面，且其物側面63a及像側面63b皆為球面。第三透鏡63之材質為玻璃。 The third lens 63 has a positive refractive power, its object side surface 63a is convex, its image side surface 63b is convex, and its object side surface 63a and image side surface 63b are spherical surfaces. The material of the third lens 63 is glass.

第四透鏡64具有負屈折力，其物側面64a為凹面、像側面64b為凹面，且其物側面64a及像側面64b皆為球面。第四透鏡64之材質為玻璃。 The fourth lens 64 has a negative refractive power, the object side surface 64a is concave, the image side surface 64b is concave, and the object side surface 64a and the image side surface 64b are spherical surfaces. The material of the fourth lens 64 is glass.

濾光元件65設置於第四透鏡64與成像面67之間，用以濾除特定波長區段的光線。濾光元件65之二表面65a、65b皆為平面，其材質為玻璃。 The filter element 65 is disposed between the fourth lens 64 and the imaging surface 67 to filter out light in a specific wavelength range. Both surfaces 65a and 65b of the filter element 65 are flat surfaces, and the material is glass.

保護玻璃66設置於影像感測元件600之上，其二表面66a、66b皆為平面，其材質為玻璃。 The protective glass 66 is disposed on the image sensor element 600, and its two surfaces 66a, 66b are flat surfaces, and the material is glass.

影像感測元件(Image Sensor)600例如是電荷耦合元件影像感測元件(Charge-Coupled Device(CCD)Image Sensor)或互補式金屬氧化半導體影像感測元件(CMOS Image Sensor)。 The image sensor 600 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

第六實施例之光學取像透鏡組60之詳細光學數據及透鏡表面之非球面係數分別列於表十五及表十六。在第六實施例中，非球面之曲線方程式表示如第一實施例的形式。 The detailed optical data and the aspheric coefficient of the lens surface of the optical imaging lens group 60 of the sixth embodiment are listed in Table 15 and Table 16, respectively. In the sixth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

Figure 110108510-A0305-02-0031-23
Figure 110108510-A0305-02-0031-23

Figure 110108510-A0305-02-0031-24
Figure 110108510-A0305-02-0031-24
Figure 110108510-A0305-02-0032-25
Figure 110108510-A0305-02-0032-25

在第六實施例中，光學取像透鏡組60之各關係式的數值列於表十七。由表十七可知，第六實施例之光學取像透鏡組60滿足關係式(1)至(14)的要求。 In the sixth embodiment, the numerical values of the relational expressions of the optical imaging lens group 60 are listed in Table 17. It can be seen from Table 17 that the optical imaging lens group 60 of the sixth embodiment satisfies the requirements of relational expressions (1) to (14).

Figure 110108510-A0305-02-0032-26
Figure 110108510-A0305-02-0032-26

參見圖6B，圖中由左至右分別為光學取像透鏡組60之縱向球差圖、像散場曲像差圖及畸變像差圖。由縱向球差圖可以看出，三種近紅外線950nm、960nm、970nm波長在不同高度的離軸光線皆可集中於成像點附近，其成像點偏差可以控制在±0.02mm以內。由像散場曲像差圖(波長960nm)可以看出，弧矢方向的像差在整個視場範圍內的焦距變化量在±0.02mm以內；子午方向的像差在整個視場範圍內的焦距變化量在±0.02mm以內；而畸變像差可以控制在12%以內。如圖6B所示，本實施例之光學取像透鏡組60已良好地修正了各項像差，符合光學系統的成像品質要求。 Referring to FIG. 6B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical imaging lens group 60, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of near-infrared 950nm, 960nm, 970nm wavelengths of off-axis light at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.02mm. From the astigmatic field curvature aberration diagram (wavelength 960nm), it can be seen that the focal length change of the sagittal aberration in the entire field of view is within ±0.02mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.02mm; and the distortion aberration can be controlled within 12%. As shown in FIG. 6B, the optical imaging lens group 60 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

第七實施例Seventh embodiment

參見圖7A及圖7B，圖7A為本發明第七實施例之光學取像透鏡組70之示意圖。圖7B由左至右依序為本發明第七實施例之縱向球差圖(Longitudinal Spherical Aberration)、像散場曲像差圖(Astigmatism/Field Curvature)及畸變像差圖(Distortion)。 Referring to FIGS. 7A and 7B, FIG. 7A is a schematic diagram of an optical imaging lens group 70 according to a seventh embodiment of the present invention. FIG. 7B shows the longitudinal spherical aberration (Longitudinal Spherical Aberration), the astigmatism/Field Curvature (Astigmatism/Field Curvature) and the distortion aberration (Distortion) of the seventh embodiment of the present invention in order from left to right.

如圖7A所示，第七實施例之光學取像透鏡組70由物側至像側依序包含光圈ST、第一透鏡71、第二透鏡72、第三透鏡73及第四透鏡74。此光學取像透鏡組70更可包含濾光元件75、保護玻璃76及成像面77。在成像面77上更可設置一影像感測元件700，以構成一成像裝置(未另標號)。 As shown in FIG. 7A, the optical imaging lens group 70 of the seventh embodiment includes an aperture ST, a first lens 71, a second lens 72, a third lens 73, and a fourth lens 74 in sequence from the object side to the image side. The optical imaging lens group 70 can further include a filter element 75, a protective glass 76 and an imaging surface 77. An image sensing element 700 can be further provided on the imaging surface 77 to form an imaging device (not shown).

第一透鏡71具有負屈折力，其物側面71a為凸面、像側面71b為凹面，且其物側面71a及像側面71b皆為非球面；其中，物側面71a在近軸處為凸面、離軸處為凹面。第一透鏡71之材質為玻璃。 The first lens 71 has a negative refractive power. Its object side surface 71a is convex, image side surface 71b is concave surface, and its object side surface 71a and image side surface 71b are both aspherical. Among them, the object side surface 71a is convex at the paraxial and off-axis. The place is concave. The material of the first lens 71 is glass.

第二透鏡72具有正屈折力，其物側面72a為凸面、像側面72b為凸面，且其物側面72a及像側面72b皆為球面。第二透鏡72之材質為玻璃。 The second lens 72 has a positive refractive power, the object side 72a is convex, the image side 72b is convex, and both the object side 72a and the image side 72b are spherical. The material of the second lens 72 is glass.

第三透鏡73具有正屈折力，其物側面73a為凸面，其像側面73b為凸面，且其物側面73a及像側面73b皆為球面。第三透鏡73之材質為玻璃。 The third lens 73 has a positive refractive power, its object side surface 73a is convex, its image side surface 73b is convex, and its object side surface 73a and image side surface 73b are spherical surfaces. The material of the third lens 73 is glass.

第四透鏡74具有負屈折力，其物側面74a為凹面、像側面74b為凹面，且其物側面74a及像側面74b皆為球面。第四透鏡74之材質為玻璃。 The fourth lens 74 has a negative refractive power, the object side 74a is concave, the image side 74b is concave, and both the object side 74a and the image side 74b are spherical. The material of the fourth lens 74 is glass.

濾光元件75設置於第四透鏡74與成像面77之間，用以濾除特定波長區段的光線。濾光元件75之二表面75a、75b皆為平面，其材質為玻璃。 The filter element 75 is disposed between the fourth lens 74 and the imaging surface 77 to filter out light in a specific wavelength range. Both surfaces 75a and 75b of the filter element 75 are flat surfaces, and the material is glass.

保護玻璃76設置於影像感測元件700之上，其二表面76a、76b皆為平面，其材質為玻璃。 The protective glass 76 is disposed on the image sensing element 700, and its two surfaces 76a, 76b are both flat surfaces, and its material is glass.

影像感測元件(Image Sensor)700例如是電荷耦合元件影像感測元件(Charge-Coupled Device(CCD)Image Sensor)或互補式金屬氧化半導體影像感測元件(CMOS Image Sensor)。 The image sensor 700 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

第七實施例之光學取像透鏡組70之詳細光學數據及透鏡表面之非球面係數分別列於表十八及表十九。在第七實施例中，非球面之曲線方程式表示如第一實施例的形式。 The detailed optical data and the aspheric coefficient of the lens surface of the optical imaging lens group 70 of the seventh embodiment are listed in Table 18 and Table 19, respectively. In the seventh embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

Figure 110108510-A0305-02-0034-27
Figure 110108510-A0305-02-0034-27

Figure 110108510-A0305-02-0034-28
Figure 110108510-A0305-02-0034-28
Figure 110108510-A0305-02-0035-29
Figure 110108510-A0305-02-0035-29

在第七實施例中，光學取像透鏡組70之各關係式的數值列於表二十。由表二十可知，第七實施例之光學取像透鏡組70滿足關係式(1)至(14)的要求。 In the seventh embodiment, the numerical values of the relational expressions of the optical imaging lens group 70 are listed in Table 20. It can be seen from Table 20 that the optical imaging lens group 70 of the seventh embodiment satisfies the requirements of the relational expressions (1) to (14).

Figure 110108510-A0305-02-0035-30
Figure 110108510-A0305-02-0035-30

參見圖7B，圖中由左至右分別為光學取像透鏡組70之縱向球差圖、像散場曲像差圖及畸變像差圖。由縱向球差圖可以看出，三種近紅外線950nm、960nm、970nm波長在不同高度的離軸光線皆可集中於成像點附近，其成像點偏差可以控制在±0.02mm以內。由像散場曲像差圖(波長960nm)可以看出，弧矢方向的像差在整個視場範圍內的焦距變化量在±0.02mm以內；子午方向的像差在整個視場範圍內的焦距變化量在±0.02mm以內；而畸變像差可以控制在20%以內。如圖7B所示，本實施例之光學取像透鏡組70已良好地修正了各項像差，符合光學系統的成像品質要求。 Referring to FIG. 7B, from left to right, the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical imaging lens group 70 are respectively shown from left to right. It can be seen from the longitudinal spherical aberration diagram that the three types of near-infrared 950nm, 960nm, 970nm wavelengths of off-axis light at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.02mm. From the astigmatic field curvature aberration diagram (wavelength 960nm), it can be seen that the focal length change of the sagittal aberration in the entire field of view is within ±0.02mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.02mm; and the distortion aberration can be controlled within 20%. As shown in FIG. 7B, the optical imaging lens assembly 70 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

第八實施例Eighth embodiment

參見圖8A及圖8B，圖8A為本發明第八實施例之光學取像透鏡組80之示意圖。圖8B由左至右依序為本發明第八實施例之縱向球差圖(Longitudinal Spherical Aberration)、像散場曲像差圖(Astigmatism/Field Curvature)及畸變像差圖(Distortion)。 Referring to FIGS. 8A and 8B, FIG. 8A is a schematic diagram of an optical imaging lens group 80 according to an eighth embodiment of the present invention. FIG. 8B is a longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), an astigmatism field curvature diagram (Astigmatism/Field Curvature), and a distortion aberration diagram (Distortion) of the eighth embodiment of the present invention in order from left to right.

如圖8A所示，第八實施例之光學取像透鏡組80由物側至像側依序包含光圈ST、第一透鏡81、第二透鏡82、第三透鏡83及第四透鏡84。此光學取像透鏡組80更可包含濾光元件85、保護玻璃86及成像面87。在成像面87上更可設置一影像感測元件800，以構成一成像裝置(未另標號)。 As shown in FIG. 8A, the optical imaging lens group 80 of the eighth embodiment includes an aperture ST, a first lens 81, a second lens 82, a third lens 83, and a fourth lens 84 in sequence from the object side to the image side. The optical imaging lens group 80 can further include a filter element 85, a protective glass 86 and an imaging surface 87. An image sensing element 800 can be further provided on the imaging surface 87 to form an imaging device (not marked separately).

第一透鏡81具有負屈折力，其物側面81a為凸面、像側面81b為凹面，且其物側面81a及像側面81b皆為非球面；其中，物側面81a在近軸處為凸面、離軸處為凹面。第一透鏡81之材質為玻璃。 The first lens 81 has a negative refractive power, the object side 81a is convex, the image side 81b is concave, and both the object side 81a and the image side 81b are aspherical; the object side 81a is convex at the paraxial and off-axis The place is concave. The material of the first lens 81 is glass.

第二透鏡82具有正屈折力，其物側面82a為凸面、像側面82b為凸面，且其物側面82a及像側面82b皆為球面。第二透鏡82之材質為玻璃。 The second lens 82 has a positive refractive power, the object side surface 82a is convex, the image side surface 82b is convex, and the object side surface 82a and the image side surface 82b are spherical surfaces. The material of the second lens 82 is glass.

第三透鏡83具有正屈折力，其物側面83a為凸面，其像側面83b為凸面，且其物側面83a及像側面83b皆為球面。第三透鏡83之材質為玻璃。 The third lens 83 has a positive refractive power, its object side surface 83a is convex, its image side surface 83b is convex, and its object side surface 83a and image side surface 83b are spherical surfaces. The material of the third lens 83 is glass.

第四透鏡84具有負屈折力，其物側面84a為凹面、像側面84b為凹面，且其物側面84a及像側面84b皆為球面。第四透鏡84之材質為玻璃。 The fourth lens 84 has a negative refractive power, the object side surface 84a is concave, the image side surface 84b is concave, and the object side surface 84a and the image side surface 84b are spherical surfaces. The material of the fourth lens 84 is glass.

濾光元件85設置於第四透鏡84與成像面87之間，用以濾除特定波長區段的光線。濾光元件85之二表面85a、85b皆為平面，其材質為玻璃。 The filter element 85 is disposed between the fourth lens 84 and the imaging surface 87 to filter out light in a specific wavelength range. Both surfaces 85a and 85b of the filter element 85 are flat surfaces, and the material is glass.

保護玻璃86設置於影像感測元件800之上，其二表面86a、86b皆為平面，其材質為玻璃。 The protective glass 86 is disposed on the image sensing element 800, and its two surfaces 86a and 86b are flat surfaces, and the material is glass.

影像感測元件(Image Sensor)800例如是電荷耦合元件影像感測元件(Charge-Coupled Device(CCD)Image Sensor)或互補式金屬氧化半導體影像感測元件(CMOS Image Sensor)。 The image sensor 800 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

第八實施例之光學取像透鏡組80之詳細光學數據及透鏡表面之非球面係數分別列於表二十一及表二十二。在第八實施例中，非球面之曲線方程式表示如第一實施例的形式。 The detailed optical data and the aspheric coefficients of the lens surface of the optical imaging lens group 80 of the eighth embodiment are listed in Table 21 and Table 22, respectively. In the eighth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

Figure 110108510-A0305-02-0037-31
Figure 110108510-A0305-02-0037-31

Figure 110108510-A0305-02-0037-32
Figure 110108510-A0305-02-0037-32
Figure 110108510-A0305-02-0038-33
Figure 110108510-A0305-02-0038-33

在第八實施例中，光學取像透鏡組80之各關係式的數值列於表二十三。由表二十三可知，第八實施例之光學取像透鏡組80滿足關係式(1)至(14)的要求。 In the eighth embodiment, the values of the relational expressions of the optical imaging lens group 80 are listed in Table 23. It can be seen from Table 23 that the optical imaging lens group 80 of the eighth embodiment satisfies the requirements of relational expressions (1) to (14).

Figure 110108510-A0305-02-0038-34
Figure 110108510-A0305-02-0038-34

參見圖8B，圖中由左至右分別為光學取像透鏡組80之縱向球差圖、像散場曲像差圖及畸變像差圖。由縱向球差圖可以看出，三種近紅外線950nm、960nm、970nm波長在不同高度的離軸光線皆可集中於成像點附近，其成像點偏差可以控制在±0.02mm以內。由像散場曲像差圖(波長960nm)可以看出，弧矢方向的像差在整個視場範圍內的焦距變化量在±0.02mm以內；子午方向的像差在整個視場範圍內的焦距變化量在±0.02mm以內；而畸變像差可以控制在10%以內。如圖8B所示，本實施例之光學取像透鏡組80已良好地修正了各項像差，符合光學系統的成像品質要求。 Referring to FIG. 8B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical imaging lens group 80, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of near-infrared 950nm, 960nm, 970nm wavelengths of off-axis light at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.02mm. From the astigmatic field curvature aberration diagram (wavelength 960nm), it can be seen that the focal length change of the sagittal aberration in the entire field of view is within ±0.02mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.02mm; and the distortion aberration can be controlled within 10%. As shown in FIG. 8B, the optical imaging lens group 80 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

第九實施例Ninth embodiment

本發明第九實施例為一成像裝置，此成像裝置包含如前述第一至第八實施例之光學取像透鏡組，及一影像感測元件；其中，影像感測元件設置於光學取像透鏡組之成像面上。影像感測元件例如是電荷耦合元件(Charge-Coupled Device，CCD)或互補式金屬氧化半導體(Complementary Metal Oxide Semiconductor，CMOS)影像感測元件等。此成像裝置例如是車用攝影之相機模組、可攜式電子產品之相機模組，或監控攝影機之相機模組等。 The ninth embodiment of the present invention is an imaging device. The imaging device includes the optical imaging lens group as described in the first to eighth embodiments and an image sensing element; wherein, the image sensing element is disposed on the optical imaging lens The imaging surface of the group. The image sensor device is, for example, a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) image sensor device. This imaging device is, for example, a camera module for car photography, a camera module for portable electronic products, or a camera module for surveillance cameras.

第十實施例Tenth embodiment

請參照圖9，圖中係繪示本發明第十實施例之電子裝置1000的示意圖。如圖所示，電子裝置1000包含一成像裝置1010及一近紅外線發射元件1020，其中，近紅外線發射元件1020設置於成像裝置1010旁。成像裝置1010例如是前述第十實施例之成像裝置，可以由本發明之光學取像透鏡組及一影像感測元件所構成。近紅外線發射元件1020例如是一近紅外線燈，用以發射波長700nm至1000nm之近紅外線光束。近紅外線發射元件1020可以朝向前方被攝物照射近紅外線光束，再利用被攝物表面反射之近紅外線光束，進行影像擷取的工作。此電子裝置1000例如是駕駛監控裝置或監視攝影機等。 Please refer to FIG. 9, which is a schematic diagram of an electronic device 1000 according to a tenth embodiment of the present invention. As shown in the figure, the electronic device 1000 includes an imaging device 1010 and a near-infrared emitting element 1020, wherein the near-infrared emitting element 1020 is disposed beside the imaging device 1010. The imaging device 1010 is, for example, the imaging device of the aforementioned tenth embodiment, which can be composed of the optical imaging lens group of the present invention and an image sensing element. The near-infrared emitting element 1020 is, for example, a near-infrared lamp, which emits a near-infrared beam with a wavelength of 700 nm to 1000 nm. The near-infrared emitting element 1020 can irradiate a near-infrared beam toward a front subject, and then use the near-infrared beam reflected on the surface of the subject to perform image capture. The electronic device 1000 is, for example, a driving monitoring device or a surveillance camera.

雖然本發明使用前述數個實施例加以說明，然而該些實施例並非用以限制本發明之範圍。對任何熟知此項技藝者而言，在不脫離本發明之精神與範圍內，仍可以參照本發明所揭露的實施例內容進行形式上和細節上的多種變化。是故，此處需明白的是，本發明係以下列申請專利範圍所界定者為準，任何在申請專利範圍內或其等效的範圍內所作的各種變化，仍應落入本發明之申請專利範圍之內。 Although the present invention is described using the foregoing several embodiments, these embodiments are not intended to limit the scope of the present invention. For anyone familiar with the art, without departing from the spirit and scope of the present invention, various changes in form and details can be made with reference to the contents of the embodiments disclosed in the present invention. Therefore, it should be understood here that the present invention is subject to the scope of the following patent applications. Any changes made within the scope of the patent application or its equivalent scope shall still fall into the application of the present invention. Within the scope of the patent.

10:光學取像透鏡組 10: Optical imaging lens group

11:第一透鏡 11: The first lens

12:第二透鏡 12: second lens

13:第三透鏡 13: The third lens

14:第四透鏡 14: The fourth lens

15:濾光元件 15: filter element

16:保護玻璃 16: protective glass

17:成像面 17: imaging surface

11a:第一透鏡之物側面 11a: Object side of the first lens

11b:第一透鏡之像側面 11b: The side of the image of the first lens

12a:第二透鏡之物側面 12a: The object side of the second lens

12b:第二透鏡之像側面 12b: The side of the image of the second lens

13a:第三透鏡之物側面 13a: Object side of the third lens

13b:第三透鏡之像側面 13b: The image side of the third lens

14a:第四透鏡之物側面 14a: The object side of the fourth lens

14b:第四透鏡之像側面 14b: The image side of the fourth lens

15a、15b:濾光元件之二表面 15a, 15b: The second surface of the filter element

16a、16b:保護玻璃之二表面 16a, 16b: Protect the second surface of glass

100:影像感測元件 100: image sensor

I:光軸 I: Optical axis

ST:光圈 ST: Aperture

Claims (16)

一種光學取像透鏡組，由物側至像側依序包含：一光圈；一第一透鏡，具有負屈折力，其像側面為凹面，該第一透鏡包含至少一非球面表面，其材質為玻璃；一第二透鏡，具有正屈折力，其像側面為凸面；一第三透鏡，具有正屈折力，其像側面為凸面；以及一第四透鏡，具有負屈折力，其物側面為凹面、像側面為凹面；其中，該光學取像透鏡組之透鏡總數為四片；該第一透鏡之焦距為f1，該第二透鏡之焦距為f2，該第三透鏡之焦距為f3，該第四透鏡之焦距為f4，係滿足以下關係式：1<f1/f4<4；及0.6<f2/f3<1.4。 An optical imaging lens group, from the object side to the image side, sequentially includes: an aperture; a first lens with negative refractive power, the image side surface is concave, the first lens includes at least one aspherical surface, the material is Glass; a second lens with positive refractive power and its image side surface is convex; a third lens with positive refractive power and its image side surface is convex; and a fourth lens with negative refractive power and its object side surface is concave The image side surface is concave; the total number of lenses in the optical imaging lens group is four; the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, and the focal length of the third lens is f3. The focal length of the four lens is f4, which satisfies the following relationship: 1<f1/f4<4; and 0.6<f2/f3<1.4. 如請求項1之光學取像透鏡組，其中，該第一透鏡之色散係數為Vd1，該第二透鏡之色散係數為Vd2，該第三透鏡之色散係數為Vd3，該第四透鏡之色散係數為Vd4，係滿足以下關係式：100<Vd1+Vd4<150；及65<Vd2+Vd3<85。 Such as the optical imaging lens set of claim 1, wherein the dispersion coefficient of the first lens is Vd1, the dispersion coefficient of the second lens is Vd2, the dispersion coefficient of the third lens is Vd3, and the dispersion coefficient of the fourth lens Is Vd4, which satisfies the following relationship: 100<Vd1+Vd4<150; and 65<Vd2+Vd3<85. 一種光學取像透鏡組，由物側至像側依序包含：一光圈；一第一透鏡，具有負屈折力，其像側面為凹面；一第二透鏡，具有正屈折力，其像側面為凸面；一第三透鏡，具有正屈折力，其像側面為凸面；以及 一第四透鏡，具有負屈折力，其物側面為凹面、像側面為凹面；其中，該光學取像透鏡組之透鏡總數為四片；該光學取像透鏡組之有效焦距為EFL，該光圈至該光學取像透鏡組之成像面在光軸上之距離為TTL，該第二透鏡之焦距為f2，該第三透鏡之焦距為f3，係滿足以下關係式：0.3<EFL/TTL<0.7；及0.6<f2/f3<1.4。 An optical imaging lens group, from the object side to the image side, includes: an aperture; a first lens with negative refractive power and a concave image side surface; a second lens with positive refractive power and an image side surface Convex; a third lens with positive refractive power, and its image side surface is convex; and A fourth lens with negative refractive power, the object side is concave, and the image side is concave; among them, the total number of lenses in the optical imaging lens group is four; the effective focal length of the optical imaging lens group is EFL, and the aperture The distance on the optical axis to the imaging surface of the optical imaging lens group is TTL, the focal length of the second lens is f2, and the focal length of the third lens is f3, which satisfies the following relationship: 0.3<EFL/TTL<0.7 ; And 0.6<f2/f3<1.4. 如請求項3之光學取像透鏡組，其中，該第一透鏡之色散係數為Vd1，該第二透鏡之色散係數為Vd2，該第三透鏡之色散係數為Vd3，該第四透鏡之色散係數為Vd4，係滿足以下關係式：100<Vd1+Vd4<150；及65<Vd2+Vd3<85。 Such as the optical imaging lens set of claim 3, wherein the dispersion coefficient of the first lens is Vd1, the dispersion coefficient of the second lens is Vd2, the dispersion coefficient of the third lens is Vd3, and the dispersion coefficient of the fourth lens Is Vd4, which satisfies the following relationship: 100<Vd1+Vd4<150; and 65<Vd2+Vd3<85. 如請求項3之光學取像透鏡組，其中，該第一透鏡之焦距為f1，該第四透鏡之焦距為f4，係滿足以下關係式：1<f1/f4<4。 For example, the optical imaging lens group of claim 3, wherein the focal length of the first lens is f1, and the focal length of the fourth lens is f4, which satisfies the following relationship: 1<f1/f4<4. 如請求項1或請求項3之光學取像透鏡組，其中，該第一透鏡與該第二透鏡之組合焦距為f12，該光學取像透鏡組之有效焦距為EFL，係滿足以下關係式：0.7<f12/EFL<1.9。 For example, the optical imaging lens group of claim 1 or claim 3, wherein the combined focal length of the first lens and the second lens is f12, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: 0.7<f12/EFL<1.9. 如請求項1或請求項3之光學取像透鏡組，其中，該第一透鏡之焦距為f1，該光學取像透鏡組之有效焦距為EFL，係滿足以下關係式：-2.6<f1/EFL<-1.1。 For example, the optical imaging lens group of claim 1 or claim 3, wherein the focal length of the first lens is f1, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: -2.6<f1/EFL <-1.1. 如請求項1或請求項3之光學取像透鏡組，其中，該第三透鏡之焦距為f3，該光學取像透鏡組之有效焦距為EFL，係滿足以下關係式：0.6<f3/EFL<1.2。 For example, the optical imaging lens group of claim 1 or claim 3, wherein the focal length of the third lens is f3, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: 0.6<f3/EFL< 1.2. 如請求項1或請求項3之光學取像透鏡組，其中，該第一透鏡物側面之曲率半徑為R1、像側面之曲率半徑為R2，係滿足以下關係式：2<R1/R2<6.5。 For example, the optical imaging lens group of claim 1 or claim 3, wherein the radius of curvature of the object side of the first lens is R1, and the radius of curvature of the image side is R2, which satisfies the following relationship: 2<R1/R2<6.5 . 如請求項1或請求項3之光學取像透鏡組，其中，該第一透鏡、該第二透鏡、該第三透鏡及該第四透鏡在光軸上之厚度和為ΣCT，該第一透鏡物側面至該第四透鏡像側面在光軸上之距離為Dr1r8，係滿足以下關係式：0.65<ΣCT/Dr1r8<0.95。 For example, the optical imaging lens group of claim 1 or claim 3, wherein the sum of the thicknesses of the first lens, the second lens, the third lens, and the fourth lens on the optical axis is ΣCT, and the first lens The distance from the object side to the image side of the fourth lens on the optical axis is Dr1r8, which satisfies the following relationship: 0.65<ΣCT/Dr1r8<0.95. 如請求項1或請求項3之光學取像透鏡組，其中，該第二透鏡物側面之曲率半徑為R3、像側面之曲率半徑為R4，係滿足以下關係式：-1.3<(R3+R4)/(R4-R3)<-0.3。 For example, the optical imaging lens group of claim 1 or claim 3, wherein the curvature radius of the object side surface of the second lens is R3, and the curvature radius of the image side surface is R4, which satisfies the following relationship: -1.3<(R3+R4 )/(R4-R3)<-0.3. 如請求項1或請求項3之光學取像透鏡組，其中，該第三透鏡物側面之曲率半徑為R5、像側面之曲率半徑為R6，係滿足以下關係式：-1.2<(R5+R6)/(R6-R5)<0。 For example, the optical imaging lens group of claim 1 or claim 3, wherein the curvature radius of the object side surface of the third lens is R5, and the curvature radius of the image side surface is R6, which satisfies the following relationship: -1.2<(R5+R6 )/(R6-R5)<0. 如請求項1或請求項3之光學取像透鏡組，其中，該第四透鏡像側面至該光學取像透鏡組之成像面在光軸上之距離為BFL，該光圈至該光學取像透鏡組之成像面在光軸上之距離為TTL，係滿足以下關係式：0.2<BFL/TTL<0.6。 For example, the optical imaging lens group of claim 1 or claim 3, wherein the distance from the image side surface of the fourth lens to the imaging surface of the optical imaging lens group on the optical axis is BFL, and the aperture is to the optical imaging lens The distance of the imaging surface of the group on the optical axis is TTL, which satisfies the following relationship: 0.2<BFL/TTL<0.6. 如請求項1或請求項3之光學取像透鏡組，其中，該第一透鏡在光軸上之厚度為CT1，該光圈至該光學取像透鏡組之成像面在光軸上之距離為TTL，係滿足以下關係式：14<TTL/CT1<25。 For example, the optical imaging lens group of claim 1 or claim 3, wherein the thickness of the first lens on the optical axis is CT1, and the distance from the aperture to the imaging surface of the optical imaging lens group on the optical axis is TTL , The system satisfies the following relationship: 14<TTL/CT1<25. 一種成像裝置，其包含如請求項1或請求項3之光學取像透鏡組及一影像感測元件，該影像感測元件設置於該光學取像透鏡組之成像面。 An imaging device comprising the optical imaging lens group as claimed in claim 1 or claim 3 and an image sensing element, the image sensing element being arranged on the imaging surface of the optical capturing lens group. 一種電子裝置，其包含如請求項15之成像裝置及一近紅外線發射元件，該近紅外線發射元件設置於該成像裝置旁，用以發射近紅外線光束，其中，該近紅外線發射元件用以朝向被攝物發射近紅外線光束，使該成像裝置得以利用被攝物表面反射之近紅外線光束擷取影像。 An electronic device comprising an imaging device as claimed in claim 15 and a near-infrared emitting element, the near-infrared emitting element is arranged beside the imaging device to emit a near-infrared beam, wherein the near-infrared emitting element is used to face the The object emits a near-infrared light beam, so that the imaging device can capture images by using the near-infrared light beam reflected from the surface of the object.
TW110108510A 2021-03-10 2021-03-10 Optical imaging lens, imaging device and electronic device TWI747760B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW110108510A TWI747760B (en) 2021-03-10 2021-03-10 Optical imaging lens, imaging device and electronic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW110108510A TWI747760B (en) 2021-03-10 2021-03-10 Optical imaging lens, imaging device and electronic device

Publications (2)

Publication Number Publication Date
TWI747760B true TWI747760B (en) 2021-11-21
TW202235947A TW202235947A (en) 2022-09-16

Family

ID=79907842

Family Applications (1)

Application Number Title Priority Date Filing Date
TW110108510A TWI747760B (en) 2021-03-10 2021-03-10 Optical imaging lens, imaging device and electronic device

Country Status (1)

Country Link
TW (1) TWI747760B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160154207A1 (en) * 2014-11-28 2016-06-02 Samsung Electro-Mechanics Co., Ltd. Lens module
TW201706668A (en) * 2016-07-05 2017-02-16 玉晶光電股份有限公司 Optical imaging lens
TW201915537A (en) * 2017-09-29 2019-04-16 大立光電股份有限公司 Electronic device
TWI693428B (en) * 2020-01-20 2020-05-11 紘立光電股份有限公司 Optical imaging lens, imaging device and electronic device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160154207A1 (en) * 2014-11-28 2016-06-02 Samsung Electro-Mechanics Co., Ltd. Lens module
TW201706668A (en) * 2016-07-05 2017-02-16 玉晶光電股份有限公司 Optical imaging lens
TW201915537A (en) * 2017-09-29 2019-04-16 大立光電股份有限公司 Electronic device
TWI693428B (en) * 2020-01-20 2020-05-11 紘立光電股份有限公司 Optical imaging lens, imaging device and electronic device

Also Published As

Publication number Publication date
TW202235947A (en) 2022-09-16

Similar Documents

Publication Publication Date Title
TWI431352B (en) Optical imaging lens assembly
TWI718066B (en) Optical imaging lens, imaging device, and electronic device
TWI691734B (en) Optical imaging lens and imaging device
TWI690743B (en) Optical imaging lens, imaging device and electronic device
TWI424214B (en) Photographing optical lens assembly
TWI717285B (en) Optical imaging lens, imaging device and electronic device
US20140104705A1 (en) Photographing lens assembly
TWI792749B (en) Optical imaging lens, imaging device, and electronic device
TWI693428B (en) Optical imaging lens, imaging device and electronic device
TWI705265B (en) Imaging lens, imaging device and electronic device having the same
TWI717264B (en) Optical imaging lens, imaging device, and electronic device
TWI680306B (en) Imaging lens, imaging device and electronic device having the same
TWI688785B (en) Imaging lens, imaging device and electronic device having the same
TWI751949B (en) Optical imaging lens, imaging device, and electronic device
TWI804892B (en) Optical imaging lens, imaging device and electronic device
TWI708963B (en) Optical imaging lens, imaging device, and electronic device
TWM581700U (en) Optical imaging lens and imaging device
CN114509862B (en) Optical system, camera module and electronic equipment
TWI747760B (en) Optical imaging lens, imaging device and electronic device
TWI717301B (en) Optical imaging lens, imaging device and electronic device
CN214845997U (en) Optical system, camera module and electronic equipment
TWI442128B (en) Compact imaging lens assembly
CN114326022A (en) Optical system, camera module and electronic equipment
TWI775657B (en) Optical imaging lens, imaging device, and electronic device
TWI848754B (en) Optical imaging lens, imaging device and electronic device