TWI791371B - Eight-piece imaging lens - Google Patents

Eight-piece imaging lens Download PDF

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TWI791371B
TWI791371B TW111100840A TW111100840A TWI791371B TW I791371 B TWI791371 B TW I791371B TW 111100840 A TW111100840 A TW 111100840A TW 111100840 A TW111100840 A TW 111100840A TW I791371 B TWI791371 B TW I791371B
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lens
optical axis
object side
image side
focal length
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TW111100840A
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TW202328737A (en
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黃梓鈞
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今國光學工業股份有限公司
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Abstract

An eight-piece imaging lens includes eight lenses. The first lens has negative diopter, with the image side being concave near the optical axis. The second lens has negative diopter, with the object side being convex and the image side being concave. The third lens has the object side and the image side being concave. The fourth lens has the object side and the image side being convex. The fifth lens is a meniscus lens, with the image side being convex. The sixth lens has the object side and the image side being convex. The seventh lens has the object side and the image side being concave. The eighth lens has the object side and the image side being convex. Through the refraction, thickness of each lens and air gap, the present invention achieves a miniaturized structure and high yield rate.

Description

八片式成像鏡頭 Eight-element imaging lens

本發明係關於一種鏡頭，尤指一種八片式成像鏡頭。 The invention relates to a lens, especially an eight-piece imaging lens.

按，光學鏡頭被廣泛地利用於各式類的電子產品上，用來提供攝像功能。然而隨著科技的進步與發展，如何使光學鏡頭體積小及廣角化，儼然為相關業者所欲追求的目標之一。 Press, optical lenses are widely used in various types of electronic products to provide camera functions. However, with the progress and development of science and technology, how to make the optical lens smaller in size and wider in angle has become one of the goals pursued by the relevant industry.

為解決上述課題，本發明提供一種八片式成像鏡頭，各鏡片之屈光力、鏡片厚度及空氣間隔搭配，達到小型化及高製造良率之效果。 In order to solve the above problems, the present invention provides an eight-element imaging lens. The refractive power of each lens, the thickness of the lens and the air gap are matched to achieve the effect of miniaturization and high manufacturing yield.

本發明之一項實施例提供一種八片式成像鏡頭，其包括八片鏡片，八片鏡片由一物側至一像側且沿著一光軸依序包括一第一鏡片、一第二鏡片、一第三鏡片、一第四鏡片、一第五鏡片、一第六鏡片、一第七鏡片及一第八鏡片，且八片鏡片分別具有面向物側的物側面及面向像側的像側面，一光圈設於第四鏡片與第五鏡片之間，其中：第一鏡片具有負屈光力，第一鏡片的像側面近光軸處為凹面；第二鏡片具有負屈光力，第二鏡片的物側面近光軸處為凸面且其像側面近光軸處為凹面；第三鏡片的物側面近光軸處為凹面且其像側面近 光軸處為凹面；第四鏡片的物側面近光軸處為凸面且其像側面近光軸處為凸面；第五鏡片的像側面近光軸處為凸面，其中，第五鏡片為彎月形透鏡；第六鏡片的物側面近光軸處為凸面且其像側面近光軸處為凸面；第七鏡片的物側面近光軸處為凹面且其像側面近光軸處為凹面；以及第八鏡片的物側面近光軸處為凸面且其像側面近光軸處為凸面。 One embodiment of the present invention provides an eight-piece imaging lens, which includes eight lenses, and the eight lenses are from an object side to an image side and include a first lens and a second lens in sequence along an optical axis , a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, and the eight lenses respectively have an object side facing the object side and an image side facing the image side , an aperture is set between the fourth lens and the fifth lens, wherein: the first lens has negative refractive power, and the image side of the first lens near the optical axis is concave; the second lens has negative refractive power, and the object side of the second lens The near optical axis is convex and its image side is concave; the object side of the third lens is concave at the near optical axis and its image side is near The optical axis is concave; the object side of the fourth lens near the optical axis is convex and the image side near the optical axis is convex; the image side of the fifth lens is convex near the optical axis, and the fifth lens is a meniscus shaped lens; the object side near optical axis of the sixth lens is convex and the image side near optical axis is convex; the object side near optical axis of the seventh lens is concave and the image side near optical axis is concave; and The near optical axis of the object side of the eighth lens is convex and the near optical axis of the image side is convex.

於其中一項實施例中，最大視場上光線於該第一鏡片之物側面至該光軸的垂直距離為SDL1，最大視場上光線及第一鏡片之像側面交點與第一鏡片之像側面的鏡片中心於光軸上的水平距離為SAG(L1R2)，其滿足下列條件式：3<SDL1/SAG(L1R2)<5；藉此，第一鏡片之有效徑與第一鏡片之像側面SAG值得比值越大，則能改善製造性增加生產良率。 In one of the embodiments, the vertical distance of the ray on the maximum field of view from the object side of the first lens to the optical axis is SDL1, the intersection point of the ray on the maximum field of view and the image side of the first lens and the image of the first lens The horizontal distance between the center of the side lens and the optical axis is SAG(L1R2), which satisfies the following conditional formula: 3<SDL1/SAG(L1R2)<5; thus, the effective diameter of the first lens and the image side of the first lens The larger the SAG value ratio, the better the manufacturability and increase the production yield.

於其中一項實施例中，第四鏡片的鏡片芯厚為CT4，第五鏡片的鏡片芯厚為CT5，第六鏡片的鏡片芯厚為CT6，光軸空隙的距離總和(不包含第八鏡片及不包含光圈與第五鏡片間在光軸上的空隙距離)為GAA，其滿足下列條件式：1<(CT4+CT5+CT6)/GAA<4；藉此，透過第四鏡片之鏡片芯厚、第五鏡片之鏡片芯厚、第六鏡片之鏡片芯厚總和與鏡片空氣間隔總和搭配，能夠有效改善慧差。 In one of the embodiments, the lens core thickness of the fourth lens is CT4, the lens core thickness of the fifth lens is CT5, the lens core thickness of the sixth lens is CT6, and the total distance of the optical axis gap (excluding the eighth lens and not including the gap distance between the aperture and the fifth lens on the optical axis) is GAA, which satisfies the following conditional formula: 1<(CT4+CT5+CT6)/GAA<4; thereby, through the lens core of the fourth lens Thickness, the lens core thickness of the fifth lens, the lens core thickness of the sixth lens combined with the total lens air space can effectively improve coma aberration.

於其中一項實施例中，第七鏡片之焦距為f7，第八鏡片之焦距為f8，第七鏡片的物側面之曲率半徑為R13，且其像側面之曲率半徑為R14；第八鏡片的物側面之曲率半徑為R15，且其像側面之曲率半徑為R16，其滿足下列條件式：-1<(f7+f8)/[(R13*R14)+(R15*R16)]<0；藉此，透過第七鏡片、第八鏡片焦距及第七鏡片之物側面與像側面曲率半徑、第八鏡片物側面與像側面曲率半徑搭配，能夠有效改善像散。 In one of the embodiments, the focal length of the seventh lens is f7, the focal length of the eighth lens is f8, the radius of curvature of the object side of the seventh lens is R13, and the radius of curvature of the image side is R14; The radius of curvature of the side of the object is R15, and the radius of curvature of the image side is R16, which satisfies the following conditional formula: -1<(f7+f8)/[(R13*R14)+(R15*R16)]<0; Therefore, the astigmatism can be effectively improved by matching the focal lengths of the seventh lens, the eighth lens, the curvature radii of the object side and the image side of the seventh lens, and the curvature radii of the object side and the image side of the eighth lens.

於其中一項實施例中，第一鏡片之焦距為f1，第二鏡片之焦距為f2，第三鏡片之焦距為f3，第四鏡片之焦距為f4，第一鏡片之物側面曲率半徑為R1，第三鏡片之物側面曲率半徑為R5，其滿足下列條件式：-1<(f1+f2+f3+f4)/(R1+R5)<1；藉此，透過第一鏡片到第四鏡片之鏡片焦距以及第一鏡片與第三鏡片之物側面曲率半徑的搭配來改善球差。 In one of the embodiments, 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, the focal length of the fourth lens is f4, and the radius of curvature of the object side surface of the first lens is R1 , the radius of curvature of the side surface of the third lens is R5, which satisfies the following conditional formula: -1<(f1+f2+f3+f4)/(R1+R5)<1; thereby, through the first lens to the fourth lens The spherical aberration can be improved by matching the focal length of the lens and the radius of curvature of the side surfaces of the first lens and the third lens.

於其中一項實施例中，第八鏡片之像側面與成像面之間於光軸上的距離為BL，第一鏡片之物側面至第八鏡片之像側面之間於光軸的距離為TD，其滿足下列條件式：0<BL/TD<1；藉此，能夠控制鏡頭後焦，以減小鏡頭體積，達到小型化效果。 In one of the embodiments, the distance on the optical axis between the image side of the eighth lens and the imaging surface is BL, and the distance between the object side of the first lens and the image side of the eighth lens on the optical axis is TD , which satisfies the following conditional formula: 0<BL/TD<1; thereby, the back focus of the lens can be controlled to reduce the volume of the lens and achieve miniaturization.

於其中一項實施例中，第一鏡片之物側面至成像面的系統總長度為TTL，八片式成像鏡頭的有效焦距為EFL，其滿足下列條件式：8<TTL/EFL<10；藉此，控制光學系統長度總和與整體光學系統焦距的比例，此比例數值越小，則可達到小型化效果。 In one of the embodiments, the total system length from the object side of the first lens to the imaging surface is TTL, and the effective focal length of the eight-piece imaging lens is EFL, which satisfies the following conditional formula: 8<TTL/EFL<10; Therefore, the ratio of the total length of the optical system to the focal length of the overall optical system is controlled, and the smaller the value of the ratio, the miniaturization effect can be achieved.

於其中一項實施例中，第一鏡片之焦距為f1，第二鏡片之焦距為f2，第三鏡片之焦距為f3，第一鏡片之物側面至成像面的系統總長度為TTL，其滿足下列條件式：-2<(f1+f2+f3)/TTL<-1；藉此，由第一鏡片、第二鏡片、第三鏡片之焦距與光學系統長度總和搭配，達到大視角效果。 In one of the embodiments, 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 total system length from the object side of the first lens to the imaging surface is TTL, which satisfies The following conditional formula: -2<(f1+f2+f3)/TTL<-1; thereby, the focal length of the first lens, the second lens, and the third lens are combined with the total length of the optical system to achieve a large viewing angle effect.

本發明之另一項實施例提供一種八片式成像鏡頭，其包括八片鏡片，八片鏡片由一物側至一像側且沿著一光軸依序包括一第一鏡片、一第二鏡片、一第三鏡片、一第四鏡片、一第五鏡片、一第六鏡片、一第七鏡片及一第八鏡片，且八片鏡片分別具有面向物側的物側面及面向像側的像側面，其中：第一鏡片具有負屈光力，第一鏡片的物側面之曲率半徑為正值或負值且其像側 面近光軸處為凹面；第二鏡片具有負屈光力，第二鏡片的物側面之曲率半徑為正值且其像側面之曲率半徑為正值；第三鏡片具有負屈光力；第四鏡片具有正屈光力；第五鏡片的物側面之曲率半徑為負值且其像側面之曲率半徑為負值；第六鏡片具有正屈光力；第七鏡片具有負屈光力；以及第八鏡片具有正屈光力。 Another embodiment of the present invention provides an eight-piece imaging lens, which includes eight mirrors, and the eight mirrors are from an object side to an image side and include a first mirror, a second mirror and an optical axis along an optical axis. lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, and the eight lenses respectively have an object side facing the object side and an image facing the image side side, wherein: the first lens has negative refractive power, the radius of curvature of the object side of the first lens is positive or negative and its image side The surface near the optical axis is concave; the second lens has negative refractive power, the radius of curvature of the object side of the second lens is positive and the radius of curvature of the image side is positive; the third lens has negative refractive power; the fourth lens has positive Refractive power; the radius of curvature of the object side of the fifth lens is negative and the radius of curvature of the image side is negative; the sixth lens has positive refractive power; the seventh lens has negative refractive power; and the eighth lens has positive refractive power.

1:八片式成像鏡頭 1: Eight-piece imaging lens

1a:八片式成像鏡頭 1a: Eight-element imaging lens

1b:八片式成像鏡頭 1b: Eight-piece imaging lens

1c:八片式成像鏡頭 1c: Eight-element imaging lens

1d:八片式成像鏡頭 1d: Eight-piece imaging lens

10:第一鏡片 10: First lens

11:物側面 11: Object side

12:像側面 12: Like the side

20:第二鏡片 20: second lens

21:物側面 21: Object side

22:像側面 22: Like the side

30:第三鏡片 30: Third lens

31:物側面 31: Object side

32:像側面 32: Like the side

40:第四鏡片 40: Fourth lens

41:物側面 41: Object side

42:像側面 42: Like the side

50:第五鏡片 50: fifth lens

51:物側面 51: Object side

52:像側面 52: Like the side

60:第六鏡片 60: sixth lens

61:物側面 61: Object side

62:像側面 62: Like the side

70:第七鏡片 70: seventh lens

71:物側面 71: Object side

72:像側面 72: Like the side

80:第八鏡片 80: eighth lens

81:物側面 81: Object side

82:像側面 82: Like the side

90:濾光片 90: filter

91:物側面 91: Object side

92:像側面 92: Like the side

100:保護玻璃 100: protective glass

101:物側面 101: Object side

102:像側面 102: Like the side

A:物側 A: Object side

B:像側 B: image side

L:光軸 L: optical axis

S:光圈 S: Aperture

C:成像面 C: imaging surface

圖1係為本發明第一實施例示意圖。 Fig. 1 is a schematic diagram of the first embodiment of the present invention.

圖2係為本發明第一實施例橫向色差圖。 FIG. 2 is a lateral color difference diagram of the first embodiment of the present invention.

圖3A係為本發明第一實施例場曲圖。 FIG. 3A is a field curvature diagram of the first embodiment of the present invention.

圖3B係為本發明第一實施例畸變曲線圖。 FIG. 3B is a distortion curve diagram of the first embodiment of the present invention.

圖4係為本發明第二實施例示意圖。 Fig. 4 is a schematic diagram of the second embodiment of the present invention.

圖5係為本發明第二實施例橫向色差圖。 FIG. 5 is a lateral color difference diagram of the second embodiment of the present invention.

圖6A係為本發明第二實施例場曲圖。 FIG. 6A is a field curvature diagram of the second embodiment of the present invention.

圖6B係為本發明第二實施例畸變曲線圖。 FIG. 6B is a distortion curve diagram of the second embodiment of the present invention.

圖7係為本發明第三實施例示意圖。 Fig. 7 is a schematic diagram of the third embodiment of the present invention.

圖8係為本發明第三實施例橫向色差圖。 FIG. 8 is a lateral color difference diagram of the third embodiment of the present invention.

圖9A係為本發明第三實施例場曲圖。 FIG. 9A is a field curvature diagram of the third embodiment of the present invention.

圖9B係為本發明第三實施例畸變曲線圖。 FIG. 9B is a distortion curve diagram of the third embodiment of the present invention.

圖10係為本發明第四實施例示意圖。 Fig. 10 is a schematic diagram of the fourth embodiment of the present invention.

圖11係為本發明第四實施例橫向色差圖。 FIG. 11 is a lateral color difference diagram of the fourth embodiment of the present invention.

圖12A係為本發明第四實施例場曲圖。 FIG. 12A is a field curvature diagram of the fourth embodiment of the present invention.

圖12B係為本發明第四實施例畸變曲線圖。 FIG. 12B is a distortion curve diagram of the fourth embodiment of the present invention.

圖13係為本發明第五實施例示意圖。 Fig. 13 is a schematic diagram of the fifth embodiment of the present invention.

圖14係為本發明第五實施例橫向色差圖。 FIG. 14 is a lateral color difference diagram of the fifth embodiment of the present invention.

圖15A係為本發明第五實施例場曲圖。 FIG. 15A is a field curvature diagram of the fifth embodiment of the present invention.

圖15B係為本發明第五實施例畸變曲線圖。 FIG. 15B is a distortion curve diagram of the fifth embodiment of the present invention.

為便於說明本發明於上述發明內容一欄中所表示的中心思想，茲以具體實施例表達。實施例中各種不同物件係按適於說明之比例、尺寸、變形量或位移量而描繪，而非按實際元件的比例予以繪製。 In order to illustrate the central idea of the present invention expressed in the column of the above-mentioned summary of the invention, it is expressed in specific embodiments. Various objects in the embodiments are drawn according to proportions, sizes, deformations or displacements suitable for illustration, rather than drawn according to the scale of actual components.

本發明所提到的方向用語，例如「前」、「後」等，僅是圖式的方向；因此，使用的方向用語是用以說明及理解本發明，而非用以限制本發明，合先敘明。 The directional terms mentioned in the present invention, such as "front", "rear", etc., are only the directions of the drawings; therefore, the directional terms used are used to illustrate and understand the present invention, rather than to limit the present invention, and are suitable Explain first.

請參閱圖1所示，本發明提供一種八片式成像鏡頭，其包括八片鏡片，八片鏡片由一物側A至一像側B且沿著一光軸L依序包括一第一鏡片10、一第二鏡片20、一第三鏡片30、一第四鏡片40、一第五鏡片50、一第六鏡片60、一第七鏡片70及一第八鏡片80，且八片鏡片分別具有面向物側A的物側面及面向像側B的像側面，而一光圈S設於第四鏡片40與第五鏡片50之間，以區分前群及後群，其中，第八鏡片80之像側面82與像側B之間更依序設有一濾光片90、一保護玻璃100及一成像面C，第八鏡片80之像側面82與濾光片90之物側面91間隔距離，濾光片90之像側面92與保護玻璃100之物側面101間隔距離，保護玻璃100之像側面102與成像面C間隔距離。 Please refer to FIG. 1, the present invention provides an eight-piece imaging lens, which includes eight lenses, and the eight lenses are from an object side A to an image side B and include a first lens in sequence along an optical axis L 10. A second lens 20, a third lens 30, a fourth lens 40, a fifth lens 50, a sixth lens 60, a seventh lens 70 and an eighth lens 80, and the eight lenses have respectively The object side facing the object side A and the image side facing the image side B, and a diaphragm S is arranged between the fourth lens 40 and the fifth lens 50 to distinguish the front group and the rear group, wherein the image of the eighth lens 80 A filter 90, a protective glass 100, and an imaging surface C are arranged in sequence between the side 82 and the image side B. The distance between the image side 82 of the eighth lens 80 and the object side 91 of the filter 90 is separated, and the light filtering The image side 92 of the sheet 90 is separated from the object side 101 of the cover glass 100 by a distance, and the image side 102 of the cover glass 100 is separated from the imaging surface C by a distance.

第一鏡片10具有負屈光力，第一鏡片10的像側面12近光軸L處為凹面，於本發明另一項實施例中，第一鏡片10的物側面11之曲率半徑為正值或負值。再者，第一鏡片10為塑膠材質且為非球面；藉此，透過第一鏡片10之負屈光力能夠達到廣角效果。 The first lens 10 has negative refractive power, and the image side 12 of the first lens 10 near the optical axis L is a concave surface. In another embodiment of the present invention, the radius of curvature of the object side 11 of the first lens 10 is positive or negative. value. Furthermore, the first lens 10 is made of plastic material and has an aspheric surface; thereby, the negative refractive power of the first lens 10 can achieve a wide-angle effect.

第二鏡片20具有負屈光力，第二鏡片20的物側面21近光軸L處為凸面且其像側面22近光軸L處為凹面，於本發明另一項實施例中，第二鏡片20的物側面21之曲率半徑為正值且其像側面22之曲率半徑為正值。再者，第二鏡片20為塑膠材質且為非球面；藉此，將第二鏡片20與第一鏡片10相互搭配，能夠達到廣角效果，並且同時改善鏡片製造性，進而提升製造良率。 The second lens 20 has negative refractive power. The object side 21 of the second lens 20 near the optical axis L is convex and its image side 22 near the optical axis L is concave. In another embodiment of the present invention, the second lens 20 The radius of curvature of the object side 21 is positive and the radius of curvature of the image side 22 is positive. Furthermore, the second lens 20 is made of plastic material and has an aspheric surface; thereby, matching the second lens 20 with the first lens 10 can achieve a wide-angle effect, and at the same time improve the manufacturability of the lens, thereby increasing the manufacturing yield.

第三鏡片30具有負屈光力，於本發明另一實施例中，第三鏡片30的物側面31近光軸L處為凹面且其像側面32近光軸L處為凹面。再者，第三鏡片30為塑膠材質且為非球面；藉此，將第三鏡片30與第一鏡片10及第二鏡片20相互搭配，能夠提升製造良率。 The third lens 30 has negative refractive power. In another embodiment of the present invention, the object side 31 of the third lens 30 is concave near the optical axis L and the image side 32 of the third lens 30 is concave near the optical axis L. Furthermore, the third lens 30 is made of plastic material and has an aspheric surface; thereby, matching the third lens 30 with the first lens 10 and the second lens 20 can improve the manufacturing yield.

第四鏡片40具有正屈光力，於本發明另一實施例中，第四鏡片40的物側面41近光軸L處為凸面且其像側面42近光軸L處為凸面。再者，第四鏡片40為玻璃材質且為球面；藉此，將第四鏡片40與第一鏡片10、第二鏡片20及第三鏡片30相互搭配，能夠改善像散。 The fourth lens 40 has positive refractive power. In another embodiment of the present invention, the object side 41 of the fourth lens 40 near the optical axis L is convex, and the image side 42 of the fourth lens 40 near the optical axis L is convex. Furthermore, the fourth lens 40 is made of glass and is spherical; thus, astigmatism can be improved by matching the fourth lens 40 with the first lens 10 , the second lens 20 and the third lens 30 .

第五鏡片50的像側面52近光軸L處為凸面，其中，第五鏡片50為彎月形透鏡且為低折射率；於本發明另一實施例中，第五鏡片50的物側面51之曲率半徑為負值且其像側面52之曲率半徑為負值。再者，第五鏡片50為塑膠材質且為非球面；藉此，透過第五鏡片50使光路平緩，提升製造性。 The image side 52 of the fifth lens 50 is convex near the optical axis L, wherein the fifth lens 50 is a meniscus lens and has a low refractive index; in another embodiment of the present invention, the object side 51 of the fifth lens 50 The radius of curvature is negative and the radius of curvature of the image side 52 is negative. Furthermore, the fifth lens 50 is made of plastic material and has an aspheric surface; thereby, the light path is smoothed through the fifth lens 50 to improve manufacturability.

第六鏡片60具有正屈光力，且具有高色散係數，於本發明另一 實施例中，第六鏡片60的物側面61近光軸L處為凸面且其像側面62近光軸L處為凸面。再者，第六鏡片60為塑膠材質且為非球面。 The sixth lens 60 has positive refractive power and has a high dispersion coefficient, which is another aspect of the present invention In the embodiment, the object side 61 of the sixth lens 60 is convex near the optical axis L, and the image side 62 of the sixth lens 60 is convex near the optical axis L. Furthermore, the sixth lens 60 is made of plastic material and is aspherical.

第七鏡片70具有負屈光力，且具有低色散係數，於本發明另一實施例中，第七鏡片70的物側面71近光軸L處為凹面且其像側面72近光軸L處為凹面。再者，第七鏡片70為塑膠材質且為非球面。 The seventh lens 70 has negative refractive power and has a low dispersion coefficient. In another embodiment of the present invention, the object side 71 of the seventh lens 70 is concave at the near optical axis L and the image side 72 of the seventh lens 70 is concave at the near optical axis L. . Furthermore, the seventh lens 70 is made of plastic material and is aspherical.

第八鏡片80具有正屈光力，且具有高色散係數，於本發明另一實施例中，第八鏡片80的物側面81近光軸L處為凸面且其像側面82近光軸L處為凸面。再者，第八鏡片80為塑膠材質且非球面；藉此，第八鏡片80與第六鏡片60及第七鏡片70相互搭配，能有效降低色差。 The eighth lens 80 has positive refractive power and has a high dispersion coefficient. In another embodiment of the present invention, the object side 81 of the eighth lens 80 near the optical axis L is convex, and the image side 82 of the eighth lens 82 near the optical axis L is convex. . Furthermore, the eighth lens 80 is made of plastic material and has an aspherical surface; thereby, the eighth lens 80 is matched with the sixth lens 60 and the seventh lens 70 to effectively reduce chromatic aberration.

接著，請參閱表一所示，係為本實施例中的八片式成像鏡頭1之設計參數值，其中，表一的數字1至20係為依序代表各元件的表面，奇數為面向物側A的物側面，偶數為面向像側B的像側面，且所述物側面的厚度代表各鏡片的厚度，所述像側面的厚度代表各鏡片與次一個鏡片或次一個光圈S於光軸L上的間距，於後實施例亦同，而不再重覆贅述： Then, please refer to Table 1, which is the design parameter value of the eight-piece imaging lens 1 in the present embodiment, wherein, the numbers 1 to 20 in Table 1 represent the surfaces of each element in sequence, and the odd numbers are object-oriented The object side of the side A, the even number is the image side facing the image side B, and the thickness of the object side represents the thickness of each lens, and the thickness of the image side represents each lens and the next lens or the next aperture S on the optical axis The spacing on L is also the same in the following embodiments, and will not be repeated here:

Figure 111100840-A0305-02-0009-2
Figure 111100840-A0305-02-0009-2
Figure 111100840-A0305-02-0010-3
Figure 111100840-A0305-02-0010-3

而在本實施例中，第一鏡片10、第二鏡片20、第三鏡片30、第五鏡片50、第六鏡片60、第七鏡片70及第八鏡片80之各非球面參數如表二所示，其中，K為非球面曲線方程式中的錐面係數，4th至16th表示各表面第4階至第16階非球面係數，於後實施例亦同，而不再重覆贅述：

Figure 111100840-A0305-02-0010-4
Figure 111100840-A0305-02-0011-5
 In this embodiment, the aspherical parameters of the first lens 10, the second lens 20, the third lens 30, the fifth lens 50, the sixth lens 60, the seventh lens 70 and the eighth lens 80 are as shown in Table 2. Shown, wherein, K is the cone coefficient in the aspheric curve equation, and 4th to 16th represent the aspheric coefficients of the 4th to 16th order of each surface, which is also the same in the following embodiments, and will not be repeated:
Figure 111100840-A0305-02-0010-4
Figure 111100840-A0305-02-0011-5

依據前述表一及表二能夠進一步得到表三之關係式數值，其中，T1至T16代表各鏡片的厚度與各鏡片間的間距，F為系統有效焦距，f1至f8代表各鏡片的焦距，R1至R16代表各鏡片各表面的曲率半徑，TTL代表第一鏡片10之物側面11至成像面C於光軸L上的距離，ALT代表個鏡片厚度的總和，GAA代表光軸L空隙的距離總和(不包含第八鏡片80及不包含光圈S與第五鏡片50間在光軸上的空隙距離)，SDL1代表最大視場上光線於第一鏡片10之物側面11至光軸L的垂直距離，SAG(L1R2)代表最大視場上光線及第一鏡片10之像側面12交點與第一鏡片10之像側面12的鏡片中心於光軸L上的水平距離，於後實施例亦以相同方法表示，而不再重覆贅述：

Figure 111100840-A0305-02-0011-6
Figure 111100840-A0305-02-0012-7
 According to the aforementioned Table 1 and Table 2, the relational values in Table 3 can be further obtained, wherein, T1 to T16 represent the thickness of each lens and the distance between each lens, F is the effective focal length of the system, f1 to f8 represent the focal length of each lens, and R1 R16 represents the radius of curvature of each surface of each lens, TTL represents the distance from the object side 11 of the first lens 10 to the imaging surface C on the optical axis L, ALT represents the sum of the thicknesses of each lens, and GAA represents the sum of the distances between the gaps of the optical axis L (not including the eighth lens 80 and not including the gap distance between the aperture S and the fifth lens 50 on the optical axis), SDL1 represents the vertical distance of the light on the maximum field of view from the object side 11 of the first lens 10 to the optical axis L , SAG(L1R2) represents the horizontal distance on the optical axis L between the ray on the maximum field of view and the image side 12 intersection point of the first lens 10 and the lens center of the image side 12 of the first lens 10, and the same method is used in the latter embodiment express, without repeating:
Figure 111100840-A0305-02-0011-6
Figure 111100840-A0305-02-0012-7

於本發明實施例中，滿足下列條件式：3<SDL1/SAG(L1R2)<5；最大視場上光線於第一鏡片10之物側面11至光軸L的垂直距離與第一鏡片10之像側面12的SAG值得比值越大，則能改善製造性增加生產良率。 In the embodiment of the present invention, the following conditional formula is satisfied: 3<SDL1/SAG(L1R2)<5; the vertical distance between the light on the maximum field of view from the object side 11 of the first lens 10 to the optical axis L and the first lens 10 As the ratio of the SAG value of the side surface 12 is larger, the manufacturability can be improved and the production yield can be increased.

於本發明實施例中，滿足下列條件式：1<(CT4+CT5+CT6)/GAA<4，其中，第四鏡片40的鏡片芯厚為CT4，第五鏡片50的鏡片芯厚為CT5，第六鏡片60的鏡片芯厚為CT6；藉此，透過第四鏡片40之鏡片芯厚、第五鏡片50之鏡片芯厚、第六鏡片60之鏡片芯厚總和與鏡片空氣間隔總和搭配，能夠有效改善慧差。 In the embodiment of the present invention, the following conditional formula is satisfied: 1<(CT4+CT5+CT6)/GAA<4, wherein the lens core thickness of the fourth lens 40 is CT4, and the lens core thickness of the fifth lens 50 is CT5, The lens core thickness of the 6th lens 60 is CT6; By this, through the lens core thickness of the 4th lens 40, the lens core thickness of the 5th lens 50, the lens core thickness sum of the sixth lens 60 and the lens air space summation match, can Effectively improve coma.

於本發明實施例中，滿足下列條件式：-1<(f7+f8)/[(R13*R14)+(R15*R16)]<0，其中，第七鏡片70之焦距為f7，第八鏡片80之焦距為f8，第七鏡片70的物側面71之曲率半徑為R13，第七鏡片70的像側面72之曲率半徑為R14；第八鏡片80的物側面81之曲率半徑為R15，第八鏡片80的像側面82之曲率半徑為R16；藉此，透過第七鏡片70、第八鏡片80的焦距及第七鏡片70之物側面曲率半徑與像側面曲率半徑、第八鏡片80之物側面曲率半徑與像側面曲率半徑搭配，能夠有效改善像散。 In the embodiment of the present invention, the following conditional formula is satisfied: -1<(f7+f8)/[(R13*R14)+(R15*R16)]<0, wherein the focal length of the seventh lens 70 is f7, and the focal length of the eighth The focal length of the eyeglass 80 is f8, the radius of curvature of the object side 71 of the seventh eyeglass 70 is R13, the curvature radius of the image side 72 of the seventh eyeglass 70 is R14; the curvature radius of the object side 81 of the eighth eyeglass 80 is R15, the The radius of curvature of the image side 82 of the eighth lens 80 is R16; thereby, through the focal length of the seventh lens 70 and the eighth lens 80 and the radius of curvature of the object side of the seventh lens 70 and the radius of curvature of the image side, the object of the eighth lens 80 The combination of side curvature radius and image side curvature radius can effectively improve astigmatism.

於本發明實施例中，滿足下列條件式：-1<(f1+f2+f3+f4)/(R1+R5)<1，其中，第一鏡片10之焦距為f1，第二鏡片20之焦距為f2，第三鏡片30之焦距為f3，第四鏡片40之焦距為f4，第一鏡片10之物側面曲率半徑為R1，第三鏡片30之物側面曲率半徑為R5；藉此，透過第一 鏡片10到第四鏡片40之鏡片焦距以及第一鏡片10與第三鏡片30之物側面曲率半徑的搭配來改善球差。 In the embodiment of the present invention, the following conditional formula is satisfied: -1<(f1+f2+f3+f4)/(R1+R5)<1, wherein the focal length of the first lens 10 is f1, and the focal length of the second lens 20 is is f2, the focal length of the third lens 30 is f3, the focal length of the fourth lens 40 is f4, the radius of curvature of the side surface of the first lens 10 is R1, and the radius of curvature of the side surface of the third lens 30 is R5; one The coordination of the lens focal lengths from the lens 10 to the fourth lens 40 and the curvature radii of the object side surfaces of the first lens 10 and the third lens 30 can improve spherical aberration.

於本發明實施例中，滿足下列條件式：0<BL/TD<1，其中，第八鏡片80之像側面82與成像面C之間於光軸L上的距離為BL，第一鏡片10之物側面11與第八鏡片80之像側面82之間於光軸L的距離為TD；藉此，能夠控制鏡頭後焦，以減小鏡頭體積，達到小型化效果。 In the embodiment of the present invention, the following conditional formula is satisfied: 0<BL/TD<1, wherein, the distance between the image side 82 of the eighth lens 80 and the imaging surface C on the optical axis L is BL, and the first lens 10 The distance between the object side 11 and the image side 82 of the eighth lens 80 on the optical axis L is TD; thereby, the back focus of the lens can be controlled to reduce the lens volume and achieve miniaturization.

於本發明實施例中，滿足下列條件式：8<TTL/EFL<10，其中，八片式成像鏡頭1的有效焦距為EFL；藉此，控制光學系統長度總和與整體光學系統焦距的比例，此比例數值越小，則可達到小型化效果。 In the embodiment of the present invention, the following conditional formula is satisfied: 8<TTL/EFL<10, wherein the effective focal length of the eight-piece imaging lens 1 is EFL; thereby, the ratio of the total length of the optical system to the focal length of the overall optical system is controlled, The smaller the value of this ratio, the miniaturization effect can be achieved.

於本發明實施例中，滿足下列條件式：-2<(f1+f2+f3)/TTL<-1，其中，第一鏡片10之焦距為f1，第二鏡片20之焦距為f2，第三鏡片30之焦距為f3；藉此，由第一鏡片10、第二鏡片20、第三鏡片30之焦距與光學系統長度總和搭配，達到大視角效果。 In the embodiment of the present invention, the following conditional formula is satisfied: -2<(f1+f2+f3)/TTL<-1, wherein the focal length of the first lens 10 is f1, the focal length of the second lens 20 is f2, and the focal length of the third lens 20 is f2. The focal length of the lens 30 is f3; thereby, the focal length of the first lens 10, the second lens 20, and the third lens 30 are combined with the length of the optical system to achieve a large viewing angle effect.

請參閱圖2至圖3A、圖3B所示，係為第一實施例的橫向色差圖、場曲圖及畸變曲線圖，其中，在本發明第一實施例中，係以0.546μm波長光線為比較基準，其最大半視場角為68度。 Please refer to Fig. 2 to Fig. 3A and Fig. 3B, which are lateral chromatic aberration diagrams, field curvature diagrams and distortion curve diagrams of the first embodiment, wherein, in the first embodiment of the present invention, light with a wavelength of 0.546 μm is For comparison, its maximum half field of view is 68 degrees.

據此本實施例能藉由各鏡片之屈折力、鏡片厚度及空氣間隔搭配，達到小型化、高製造良率的八片式成像鏡頭1。 Accordingly, the present embodiment can realize the eight-element imaging lens 1 with miniaturization and high manufacturing yield by matching the refractive power of each lens, lens thickness and air space.

再者，本發明藉由第一鏡片10、第二鏡片20及第三鏡片30之焦距搭配，以及材料折射率搭配控制光線走向，以修正系統敏感度，進而提升製造良率。 Furthermore, the present invention controls the direction of light through the matching of the focal lengths of the first lens 10 , the second lens 20 and the third lens 30 , and the matching of the refractive index of the materials to correct the system sensitivity and improve the manufacturing yield.

請參閱圖4至圖6B，係為本發明第二實施例，圖3為八片式成像 鏡頭1a結構示意圖，圖5、圖6A、圖6B分別為橫向色差圖、場曲圖及畸變曲線圖，其中，在本發明第二實施例中，係以0.546μm波長光線為比較基準，其最大半視場角為65度。 Please refer to Fig. 4 to Fig. 6B, it is the second embodiment of the present invention, and Fig. 3 is an eight-chip imaging Schematic diagram of the structure of the lens 1a, Fig. 5, Fig. 6A, and Fig. 6B are the lateral chromatic aberration diagram, field curvature diagram and distortion curve diagram respectively, wherein, in the second embodiment of the present invention, the light with a wavelength of 0.546 μm is used as the comparison reference, and the maximum The half field of view is 65 degrees.

第二實施例與第一實施例配置大致相同，其差異點在於，八片式成像鏡頭1a的有效焦距EFL為2.49mm，入瞳孔徑EPD為1.556mm，最大視角FOV為130度，像高IMGH為3.696mm，光圈值FNO為1.6。 The configuration of the second embodiment is roughly the same as that of the first embodiment, except that the effective focal length EFL of the eight-piece imaging lens 1a is 2.49 mm, the entrance pupil diameter EPD is 1.556 mm, the maximum viewing angle FOV is 130 degrees, and the image height IMGH It is 3.696mm, and the aperture value FNO is 1.6.

接著，請參閱表四所示，係為第二實施例中的八片式成像鏡頭1a之設計參數值：

Figure 111100840-A0305-02-0014-8
Next, please refer to Table 4, which is the design parameter value of the eight-chip imaging lens 1a in the second embodiment:
Figure 111100840-A0305-02-0014-8

Figure 111100840-A0305-02-0015-9
Figure 111100840-A0305-02-0015-9

依據前述表四及表五能夠進一步得到表六之關係式數值：

Figure 111100840-A0305-02-0015-10
Figure 111100840-A0305-02-0016-11
 According to the aforementioned Table 4 and Table 5, the value of the relational expression in Table 6 can be further obtained:
Figure 111100840-A0305-02-0015-10
Figure 111100840-A0305-02-0016-11

依據前述條件，本發明第二實施例同樣具有第一實施例之功效。 According to the aforementioned conditions, the second embodiment of the present invention also has the effects of the first embodiment.

請參閱圖7至圖9B，係為本發明第三實施例，圖7為八片式成像鏡頭1b結構示意圖，圖8、圖9A、圖9B分別為橫向色差圖、場曲圖及畸變曲線圖，其中，在本發明第三實施例中，係以0.546μm波長光線為比較基準，其最大半視場角為55度。 Please refer to FIG. 7 to FIG. 9B, which are the third embodiment of the present invention. FIG. 7 is a schematic structural diagram of an eight-chip imaging lens 1b. FIG. 8, FIG. 9A, and FIG. 9B are diagrams of lateral chromatic aberration, field curvature, and distortion curves, respectively. , wherein, in the third embodiment of the present invention, the light with a wavelength of 0.546 μm is used as a comparison reference, and its maximum half-field angle is 55 degrees.

第三實施例與第一實施例配置大致相同，其差異點在於，八片式成像鏡頭1b的有效焦距EFL為2.384mm，入瞳孔徑EPD為1.49mm，最大視角FOV為110度，像高IMGH為2.742mm，光圈值FNO為1.6。 The configuration of the third embodiment is roughly the same as that of the first embodiment, except that the effective focal length EFL of the eight-piece imaging lens 1b is 2.384 mm, the entrance pupil diameter EPD is 1.49 mm, the maximum viewing angle FOV is 110 degrees, and the image height IMGH It is 2.742mm, and the aperture value FNO is 1.6.

接著，請參閱表七所示，係為第三實施例中的八片式成像鏡頭1b之設計參數值：

Figure 111100840-A0305-02-0016-12
Figure 111100840-A0305-02-0017-13
 Next, please refer to Table 7, which is the design parameter value of the eight-chip imaging lens 1b in the third embodiment:
Figure 111100840-A0305-02-0016-12
Figure 111100840-A0305-02-0017-13

Figure 111100840-A0305-02-0017-14
Figure 111100840-A0305-02-0017-14
Figure 111100840-A0305-02-0018-15
Figure 111100840-A0305-02-0018-15

依據前述表七及表八能夠進一步得到表九之關係式數值：

Figure 111100840-A0305-02-0018-16
According to the aforementioned Table 7 and Table 8, the value of the relational expression in Table 9 can be further obtained:
Figure 111100840-A0305-02-0018-16

依據前述條件，本發明第三實施例同樣具有第一實施例之功效。 According to the aforementioned conditions, the third embodiment of the present invention also has the effects of the first embodiment.

請參閱圖10至圖12B，係為本發明第四實施例，圖10為八片式成像鏡頭1c結構示意圖，圖11、圖12A、圖12B分別為橫向色差圖、場曲圖及畸變曲線圖，其中，在本發明第四實施例中，係以0.546μm波長光線為比較基準，其最大半視場角為66度。 Please refer to Fig. 10 to Fig. 12B, which are the fourth embodiment of the present invention. Fig. 10 is a schematic structural diagram of an eight-piece imaging lens 1c. Fig. 11, Fig. 12A, and Fig. 12B are diagrams of lateral chromatic aberration, field curvature and distortion curves respectively , wherein, in the fourth embodiment of the present invention, the light with a wavelength of 0.546 μm is used as a comparison reference, and its maximum half-field angle is 66 degrees.

第四實施例與第一實施例配置大致相同，其差異點在於，八片式成像鏡頭1c的有效焦距EFL為2.149mm，入瞳孔徑EPD為1.343m，最大視角FOV為132度，像高IMGH為3.306mm，光圈值FNO為1.6。 The configuration of the fourth embodiment is roughly the same as that of the first embodiment, except that the effective focal length EFL of the eight-chip imaging lens 1c is 2.149 mm, the entrance pupil diameter EPD is 1.343 m, the maximum viewing angle FOV is 132 degrees, and the image height IMGH It is 3.306mm, and the aperture value FNO is 1.6.

接著，請參閱表十所示，係為第四實施例中的八片式成像鏡頭1c之設計參數值：

Figure 111100840-A0305-02-0019-17
Next, please refer to Table 10, which is the design parameter value of the eight-chip imaging lens 1c in the fourth embodiment:
Figure 111100840-A0305-02-0019-17

Figure 111100840-A0305-02-0019-18
Figure 111100840-A0305-02-0019-18
Figure 111100840-A0305-02-0020-19
Figure 111100840-A0305-02-0020-19

依據前述表十及表十一能夠進一步得到表十二之關係式數值：

Figure 111100840-A0305-02-0020-20
Figure 111100840-A0305-02-0021-21
 According to the aforementioned Table 10 and Table 11, the value of the relational expression in Table 12 can be further obtained:
Figure 111100840-A0305-02-0020-20
Figure 111100840-A0305-02-0021-21

依據前述條件，本發明第四實施例同樣具有第一實施例之功效。 According to the aforementioned conditions, the fourth embodiment of the present invention also has the effects of the first embodiment.

請參閱圖13至圖15B，係為本發明第五實施例，圖13為八片式成像鏡頭1d結構示意圖，圖14、圖15A、圖15B分別為橫向色差圖、場曲圖及畸變曲線圖，其中，在本發明第五實施例中，係以0.546μm波長光線為比較基準，其最大半視場角為60度。 Please refer to Figure 13 to Figure 15B, which are the fifth embodiment of the present invention, Figure 13 is a schematic diagram of the structure of the eight-chip imaging lens 1d, Figure 14, Figure 15A, and Figure 15B are the lateral chromatic aberration diagram, field curvature diagram and distortion curve diagram respectively , wherein, in the fifth embodiment of the present invention, the light with a wavelength of 0.546 μm is used as a comparison reference, and its maximum half-field angle is 60 degrees.

第五實施例與第一實施例配置大致相同，其差異點在於，八片式成像鏡頭1d的有效焦距EFL為2.187mm，入瞳孔徑EPD為1.215m，最大視角FOV為120度，像高IMGH為3.072mm，光圈值FNO為1.8。 The configuration of the fifth embodiment is roughly the same as that of the first embodiment, except that the effective focal length EFL of the eight-chip imaging lens 1d is 2.187mm, the entrance pupil diameter EPD is 1.215m, the maximum viewing angle FOV is 120 degrees, and the image height IMGH It is 3.072mm, and the aperture value FNO is 1.8.

接著，請參閱表十三所示，係為第五實施例中的八片式成像鏡頭1d之設計參數值：

Figure 111100840-A0305-02-0021-22
Figure 111100840-A0305-02-0022-23
 Next, please refer to Table 13, which is the design parameter value of the eight-chip imaging lens 1d in the fifth embodiment:
Figure 111100840-A0305-02-0021-22
Figure 111100840-A0305-02-0022-23

Figure 111100840-A0305-02-0022-24
Figure 111100840-A0305-02-0022-24

依據前述表十三及表十四能夠進一步得到表十五之關係式數值：

Figure 111100840-A0305-02-0023-25
According to the aforementioned Table 13 and Table 14, the value of the relational expression in Table 15 can be further obtained:
Figure 111100840-A0305-02-0023-25

依據前述條件，本發明第五實施例同樣具有第一實施例之功效。 According to the foregoing conditions, the fifth embodiment of the present invention also has the effects of the first embodiment.

以上所舉實施例僅用以說明本發明而已，非用以限制本發明之範圍。舉凡不違本發明精神所從事的種種修改或變化，俱屬本發明意欲保護之範疇。 The above-mentioned embodiments are only used to illustrate the present invention, and are not intended to limit the scope of the present invention. All modifications or changes that do not violate the spirit of the present invention belong to the intended protection category of the present invention.

1:八片式成像鏡頭 1: Eight-piece imaging lens

10:第一鏡片 10: First lens

11:物側面 11: Object side

12:像側面 12: Like the side

20:第二鏡片 20: second lens

21:物側面 21: Object side

22:像側面 22: Like the side

30:第三鏡片 30: Third lens

31:物側面 31: Object side

32:像側面 32: Like the side

40:第四鏡片 40: Fourth lens

41:物側面 41: Object side

42:像側面 42: Like the side

50:第五鏡片 50: fifth lens

51:物側面 51: Object side

52:像側面 52: Like the side

60:第六鏡片 60: sixth lens

61:物側面 61: Object side

62:像側面 62: Like the side

70:第七鏡片 70: seventh lens

71:物側面 71: Object side

72:像側面 72: Like the side

80:第八鏡片 80: eighth lens

81:物側面 81: Object side

82:像側面 82: Like the side

90:濾光片 90: filter

91:物側面 91: Object side

92:像側面 92: Like the side

100:保護玻璃 100: protective glass

101:物側面 101: Object side

102:像側面 102: Like the side

A:物側 A: Object side

B:像側 B: image side

L:光軸 L: optical axis

S:光圈 S: Aperture

C:成像面 C: imaging surface

Claims (20)

一種八片式成像鏡頭，其包括八片鏡片，該八片鏡片由一物側至一像側且沿著一光軸依序包括一第一鏡片、一第二鏡片、一第三鏡片、一第四鏡片、一第五鏡片、一第六鏡片、一第七鏡片及一第八鏡片，且該八片鏡片分別具有面向該物側的物側面及面向該像側的像側面，一光圈設於該第四鏡片與該第五鏡片之間，其中：該第一鏡片具有負屈光力，該第一鏡片的像側面近該光軸處為凹面；該第二鏡片具有負屈光力，該第二鏡片的物側面近該光軸處為凸面且其像側面近該光軸處為凹面；該第三鏡片的物側面近該光軸處為凹面且其像側面近該光軸處為凹面；該第四鏡片的物側面近該光軸處為凸面且其像側面近該光軸處為凸面；該第五鏡片的像側面近該光軸處為凸面，其中，該第五鏡片為彎月形透鏡；該第六鏡片的物側面近該光軸處為凸面且其像側面近該光軸處為凸面；該第七鏡片的物側面近該光軸處為凹面且其像側面近該光軸處為凹面；該第八鏡片的物側面近該光軸處為凸面且其像側面近該光軸處為凸面；以及該最大視場上光線於該第一鏡片之物側面至該光軸的垂直距離為SDL1，最大視場上光線及該第一鏡片之像側面交點與該第一鏡片之像側面的鏡片中心於該光軸上的水平距離為SAG(L1R2)，其滿足下列條件式：3<SDL1/SAG(L1R2)<5。 An eight-piece imaging lens, which includes eight lenses, the eight lenses from an object side to an image side and along an optical axis sequentially include a first lens, a second lens, a third lens, a A fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, and the eight lenses respectively have an object side facing the object side and an image side facing the image side, and an aperture is set Between the fourth lens and the fifth lens, wherein: the first lens has negative refractive power, and the image side of the first lens is concave near the optical axis; the second lens has negative refractive power, and the second lens The object side of the third lens is convex near the optical axis and the image side is concave near the optical axis; the object side of the third lens is concave near the optical axis and the image side of the third lens is concave near the optical axis; The object side of the four mirrors is convex near the optical axis and the image side is convex near the optical axis; the image side of the fifth mirror is convex near the optical axis, wherein the fifth mirror is a meniscus lens The object side of the sixth eyeglass is convex near the optical axis, and its image side is convex near the optical axis; the object side of the seventh eyeglass is concave near the optical axis, and its image side is near the optical axis. It is a concave surface; the object side of the eighth lens is convex near the optical axis, and its image side is convex near the optical axis; The distance is SDL1, the horizontal distance between the intersection of the ray on the maximum field of view and the image side of the first lens and the center of the lens on the image side of the first lens on the optical axis is SAG(L1R2), which satisfies the following conditional formula: 3 <SDL1/SAG(L1R2)<5. 如請求項1所述之八片式成像鏡頭，其中，該第四鏡片的鏡片芯厚為CT4，該第五鏡片的鏡片芯厚為CT5，該第六鏡片的鏡片芯厚為CT6，該光軸空隙的距離總和(不包含該第八鏡片及不包含該光圈與該第五鏡片間在光軸上的空隙距離)為GAA，其滿足下列條件式： 1<(CT4+CT5+CT6)/GAA<4。 The eight-piece imaging lens as described in Claim 1, wherein the lens core thickness of the fourth lens is CT4, the lens core thickness of the fifth lens is CT5, and the lens core thickness of the sixth lens is CT6. The sum of the distances of the axial gap (not including the eighth lens and not including the gap distance between the aperture and the fifth lens on the optical axis) is GAA, which satisfies the following conditional formula: 1<(CT4+CT5+CT6)/GAA<4. 如請求項1所述之八片式成像鏡頭，其中，該第七鏡片之焦距為f7，該第八鏡片之焦距為f8，該第七鏡片的物側面之曲率半徑為R13，且其像側面之曲率半徑為R14；該第八鏡片的物側面之曲率半徑為R15，且其像側面之曲率半徑為R16，其滿足下列條件式：-1<(f7+f8)/[(R13*R14)+(R15*R16)]<0。 The eight-piece imaging lens as described in claim 1, wherein the focal length of the seventh lens is f7, the focal length of the eighth lens is f8, the radius of curvature of the object side of the seventh lens is R13, and the image side The radius of curvature is R14; the radius of curvature of the object side of the eighth lens is R15, and the radius of curvature of the image side is R16, which satisfies the following conditional formula: -1<(f7+f8)/[(R13*R14) +(R15*R16)]<0. 如請求項1所述之八片式成像鏡頭，其中，該第一鏡片之焦距為f1，該第二鏡片之焦距為f2，該第三鏡片之焦距為f3，該第四鏡片之焦距為f4，該第一鏡片之物側面曲率半徑為R1，該第三鏡片之物側面曲率半徑為R5，其滿足下列條件式：-1<(f1+f2+f3+f4)/(R1+R5)<1。 The eight-piece imaging lens as described in Claim 1, wherein 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 , the radius of curvature of the side surface of the first lens is R1, and the radius of curvature of the side surface of the third lens is R5, which satisfies the following conditional formula: -1<(f1+f2+f3+f4)/(R1+R5)< 1. 如請求項1所述之八片式成像鏡頭，其中，該第八鏡片之像側面與成像面之間於該光軸上的距離為BL，該第一鏡片之物側面至該第八鏡片之像側面之間於該光軸的距離為TD，其滿足下列條件式：0<BL/TD<1。 The eight-piece imaging lens as described in claim 1, wherein the distance between the image side of the eighth lens and the image surface on the optical axis is BL, and the distance between the object side of the first lens and the eighth lens is The distance between the image sides on the optical axis is TD, which satisfies the following conditional formula: 0<BL/TD<1. 如請求項1所述之八片式成像鏡頭，其中，該第一鏡片之物側面至成像面的系統總長度為TTL，該八片式成像鏡頭的有效焦距為EFL，其滿足下列條件式：8<TTL/EFL<10。 The eight-piece imaging lens as described in claim 1, wherein the total system length from the object side of the first lens to the imaging surface is TTL, and the effective focal length of the eight-piece imaging lens is EFL, which satisfies the following conditional formula: 8<TTL/EFL<10. 如請求項1所述之八片式成像鏡頭，其中，該第一鏡片之焦距為f1，該第二鏡片之焦距為f2，該第三鏡片之焦距為f3，該第一鏡片之物側面至成像面的系統總長度為TTL，其滿足下列條件式： -2<(f1+f2+f3)/TTL<-1。 The eight-piece imaging lens as described in Claim 1, wherein 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 object side of the first lens is to The total system length of the imaging surface is TTL, which satisfies the following conditional formula: -2<(f1+f2+f3)/TTL<-1. 如請求項1所述之八片式成像鏡頭，其中，該第一鏡片、該第二鏡片、該第三鏡片、該第五鏡片、該第六鏡片、該第七鏡片及該第八鏡片為塑膠材質且非球面。 The eight-element imaging lens as described in Claim 1, wherein the first lens, the second lens, the third lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are Plastic and aspherical. 如請求項1所述之八片式成像鏡頭，其中，該第四鏡片為玻璃材質且為球面。 The eight-piece imaging lens according to claim 1, wherein the fourth lens is made of glass and spherical. 一種八片式成像鏡頭，其包括八片鏡片，該八片鏡片由一物側至一像側且沿著一光軸依序包括一第一鏡片、一第二鏡片、一第三鏡片、一第四鏡片、一第五鏡片、一第六鏡片、一第七鏡片及一第八鏡片，且該八片鏡片分別具有面向該物側的物側面及面向該像側的像側面，一光圈設於該第四鏡片與該第五鏡片之間，其中：該第一鏡片具有負屈光力，該第一鏡片的物側面之曲率半徑為正值或負值且其像側面近該光軸處為凹面；該第二鏡片具有負屈光力，該第二鏡片的物側面之曲率半徑為正值且其像側面之曲率半徑為正值；該第三鏡片具有負屈光力；該第四鏡片具有正屈光力；該第五鏡片的物側面之曲率半徑為負值且其像側面之曲率半徑為負值；該第六鏡片具有正屈光力；該第七鏡片具有負屈光力；該第八鏡片具有正屈光力；以及該最大視場上光線於該第一鏡片之物側面至該光軸的垂直距離為SDL1，最 大視場上光線及該第一鏡片之像側面交點與該第一鏡片之像側面的鏡片中心於該光軸上的水平距離為SAG(L1R2)，其滿足下列條件式：3<SDL1/SAG(L1R2)<5。 An eight-piece imaging lens, which includes eight lenses, the eight lenses from an object side to an image side and along an optical axis sequentially include a first lens, a second lens, a third lens, a A fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, and the eight lenses respectively have an object side facing the object side and an image side facing the image side, and an aperture is set Between the fourth lens and the fifth lens, wherein: the first lens has negative refractive power, the radius of curvature of the object side of the first lens is positive or negative, and its image side is concave near the optical axis ; The second lens has negative refractive power, the radius of curvature of the object side of the second lens is positive and the radius of curvature of the image side is positive; the third lens has negative refractive power; the fourth lens has positive refractive power; The radius of curvature of the object side of the fifth lens is negative and the radius of curvature of the image side is negative; the sixth lens has positive refractive power; the seventh lens has negative refractive power; the eighth lens has positive refractive power; The vertical distance from the light on the field of view to the optical axis from the object side of the first lens is SDL1, and the maximum The horizontal distance between the intersection point of the ray on the large field of view and the image side of the first lens and the lens center of the image side of the first lens on the optical axis is SAG (L1R2), which satisfies the following conditional formula: 3<SDL1/SAG (L1R2)<5. 如請求項10所述之八片式成像鏡頭，其中，該第四鏡片的鏡片芯厚為CT4，該第五鏡片的鏡片芯厚為CT5，該第六鏡片的鏡片芯厚為CT6，該光軸空隙的距離總和(不包含該第八鏡片及不包含該光圈與該第五鏡片間在光軸上的空隙距離)為GAA，其滿足下列條件式：1<(CT4+CT5+CT6)/GAA<4。 The eight-piece imaging lens as described in Claim 10, wherein the lens core thickness of the fourth lens is CT4, the lens core thickness of the fifth lens is CT5, and the lens core thickness of the sixth lens is CT6. The distance summation of the axis gap (not including the 8th lens and not including the gap distance between the aperture and the 5th lens on the optical axis) is GAA, which satisfies the following conditional formula: 1<(CT4+CT5+CT6)/ GAA<4. 如請求項10所述之八片式成像鏡頭，其中，該第七鏡片之焦距為f7，該第八鏡片之焦距為f8，該第七鏡片的物側面之曲率半徑為R13，且其像側面之曲率半徑為R14；該第八鏡片的物側面之曲率半徑為R15，且其像側面之曲率半徑為R16，其滿足下列條件式：-1<(f7+f8)/[(R13*R14)+(R15*R16)]<0。 The eight-piece imaging lens as described in Claim 10, wherein the focal length of the seventh lens is f7, the focal length of the eighth lens is f8, the radius of curvature of the object side of the seventh lens is R13, and the image side The radius of curvature is R14; the radius of curvature of the object side of the eighth lens is R15, and the radius of curvature of the image side is R16, which satisfies the following conditional formula: -1<(f7+f8)/[(R13*R14) +(R15*R16)]<0. 如請求項10所述之八片式成像鏡頭，其中，該第一鏡片之焦距為f1，該第二鏡片之焦距為f2，該第三鏡片之焦距為f3，該第四鏡片之焦距為f4，該第一鏡片之物側面曲率半徑為R1，該第三鏡片之物側面曲率半徑為R5，其滿足下列條件式：-1<(f1+f2+f3+f4)/(R1+R5)<1。 The eight-piece imaging lens as described in Claim 10, wherein 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 , the radius of curvature of the side surface of the first lens is R1, and the radius of curvature of the side surface of the third lens is R5, which satisfies the following conditional formula: -1<(f1+f2+f3+f4)/(R1+R5)< 1. 如請求項10所述之八片式成像鏡頭，其中，該第八鏡片之像側面與成像面之間於該光軸上的距離為BL，該第一鏡片之物側面至該第八鏡片之像側面之間於該光軸的距離為TD，其滿足下列條件式：0<BL/TD<1。 The eight-piece imaging lens as described in Claim 10, wherein the distance between the image side of the eighth lens and the imaging surface on the optical axis is BL, and the distance between the object side of the first lens and the eighth lens is The distance between the image sides on the optical axis is TD, which satisfies the following conditional formula: 0<BL/TD<1. 如請求項10所述之八片式成像鏡頭，其中，該第一鏡片之物側 面至成像面的系統總長度為TTL，該八片式成像鏡頭的有效焦距為EFL，其滿足下列條件式：8<TTL/EFL<10。 The eight-piece imaging lens according to claim 10, wherein the object side of the first lens The total length of the system from the plane to the imaging plane is TTL, and the effective focal length of the eight-chip imaging lens is EFL, which satisfies the following conditional formula: 8<TTL/EFL<10. 如請求項10所述之八片式成像鏡頭，其中，該第一鏡片之焦距為f1，該第二鏡片之焦距為f2，該第三鏡片之焦距為f3，該第一鏡片之物側面至成像面的系統總長度為TTL，其滿足下列條件式：-2<(f1+f2+f3)/TTL<-1。 The eight-piece imaging lens as described in Claim 10, wherein 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 object side of the first lens is to The total system length of the imaging surface is TTL, which satisfies the following conditional expression: -2<(f1+f2+f3)/TTL<-1. 如請求項10所述之八片式成像鏡頭，其中，該第一鏡片、該第二鏡片、該第三鏡片、該第五鏡片、該第六鏡片、該第七鏡片及該第八鏡片為塑膠材質且非球面。 The eight-element imaging lens as described in Claim 10, wherein the first lens, the second lens, the third lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are Plastic and aspherical. 如請求項10所述之八片式成像鏡頭，其中，該第四鏡片為玻璃材質且為球面。 The eight-piece imaging lens according to claim 10, wherein the fourth lens is made of glass and spherical. 如請求項10至18任一項所述之八片式成像鏡頭，其中，該第三鏡片之物側面及像側面近該光軸處皆為凹面；該第七鏡片之物側面及像側面近該光軸處皆為凹面。 The eight-piece imaging lens as described in any one of claims 10 to 18, wherein, the object side and the image side of the third lens are concave near the optical axis; the object side and the image side of the seventh lens are near All the optical axes are concave. 如請求項10至18任一項所述之八片式成像鏡頭，其中，該第四鏡片之物側面及像側面近該光軸處皆為凸面；該第六鏡片之物側面及像側面近該光軸處皆為凸面，該第八鏡片之物側面及像側面近該光軸處皆為凸面。 The eight-piece imaging lens as described in any one of claims 10 to 18, wherein, the object side and the image side of the fourth lens are convex near the optical axis; the object side and the image side of the sixth lens are near The optical axis is convex, and the object side and the image side of the eighth lens are convex near the optical axis.
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US20120113532A1 (en) * 2010-11-04 2012-05-10 Samsung Techwin Co., Ltd. Fisheye lens sysem and photographing apparatus
US20180039049A1 (en) * 2016-08-03 2018-02-08 Samsung Electronics Co., Ltd. Optical lens assembly and electronic apparatus including the same
TW201823793A (en) * 2016-12-27 2018-07-01 信泰光學（深圳）有限公司 Lens assembly
WO2021031585A1 (en) * 2019-08-20 2021-02-25 江西联创电子有限公司 Optical imaging lens and imaging device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120113532A1 (en) * 2010-11-04 2012-05-10 Samsung Techwin Co., Ltd. Fisheye lens sysem and photographing apparatus
US20180039049A1 (en) * 2016-08-03 2018-02-08 Samsung Electronics Co., Ltd. Optical lens assembly and electronic apparatus including the same
TW201823793A (en) * 2016-12-27 2018-07-01 信泰光學（深圳）有限公司 Lens assembly
WO2021031585A1 (en) * 2019-08-20 2021-02-25 江西联创电子有限公司 Optical imaging lens and imaging device

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