TWI825679B - Lens assembly - Google Patents
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- TWI825679B TWI825679B TW111114668A TW111114668A TWI825679B TW I825679 B TWI825679 B TW I825679B TW 111114668 A TW111114668 A TW 111114668A TW 111114668 A TW111114668 A TW 111114668A TW I825679 B TWI825679 B TW I825679B
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- 230000003287 optical effect Effects 0.000 claims abstract description 72
- 238000003384 imaging method Methods 0.000 claims description 135
- 230000005499 meniscus Effects 0.000 claims description 38
- 230000008859 change Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 32
- 239000011521 glass Substances 0.000 description 29
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- 230000001681 protective effect Effects 0.000 description 14
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- 101100233058 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) IMA2 gene Proteins 0.000 description 3
- 101100075908 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) IMA3 gene Proteins 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
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Abstract
Description
本發明係有關於一種成像鏡頭。 The invention relates to an imaging lens.
習知的監控攝影機大都不具備變焦功能,但隨著工業自動化、物聯網的發展,使得人們對監控攝影機的要求越來越多,尤其是針對小型化、高解析度、低成本及高變焦倍率的要求越來越高,習知的成像鏡頭已經無法滿足現今監控攝影機要求,需要有另一種新架構的成像鏡頭,才能同時滿足小型化、高解析度、低成本及高變焦倍率以符合監控攝影機的需求。 Most of the conventional surveillance cameras do not have zoom function, but with the development of industrial automation and the Internet of Things, people have more and more requirements for surveillance cameras, especially for miniaturization, high resolution, low cost and high zoom ratio. The requirements are getting higher and higher. The conventional imaging lens can no longer meet the requirements of today's surveillance cameras. An imaging lens with another new architecture is needed to meet the requirements of miniaturization, high resolution, low cost and high zoom magnification at the same time to meet the requirements of surveillance cameras. needs.
有鑑於此,本發明之主要目的在於提供一種成像鏡頭,其鏡頭總長度較短、解析度較高、成本較低及具備較高變焦倍率,但是仍具有良好的光學性能。 In view of this, the main purpose of the present invention is to provide an imaging lens with a shorter overall length, higher resolution, lower cost, and higher zoom magnification, but still has good optical performance.
本發明之成像鏡頭包括一第一透鏡群、一第二透鏡群、一第三透鏡群及一第四透鏡群。第一透鏡群具有正屈光力。第二透鏡群具有負屈光力,此第二透鏡群至少包括二具負屈光力透鏡。第三透鏡群具有正屈光力,此第三透鏡群包括一3-1透鏡、一3-2透鏡及一3-3透鏡,此3-1透鏡具有正屈光力,此3-3透鏡包括一凹面朝向一物側。第四透鏡群具有正 屈光力。第一透鏡群、第二透鏡群、第三透鏡群及第四透鏡群沿著一光軸從物側至一像側依序排列。3-1透鏡、3-2透鏡及3-3透鏡沿著光軸從物側至像側依序排列,且此等透鏡間彼此相鄰。當本發明之成像鏡頭滿足上述特徵且不需其他額外的特徵或條件,即可達成本發明之成像鏡頭之基本功能。 The imaging lens of the present invention includes a first lens group, a second lens group, a third lens group and a fourth lens group. The first lens group has positive refractive power. The second lens group has negative refractive power, and the second lens group includes at least two lenses with negative refractive power. The third lens group has positive refractive power. The third lens group includes a 3-1 lens, a 3-2 lens and a 3-3 lens. The 3-1 lens has positive refractive power. The 3-3 lens includes a concave surface facing One thing side. The fourth lens group has positive Refractive power. The first lens group, the second lens group, the third lens group and the fourth lens group are arranged in sequence from the object side to an image side along an optical axis. The 3-1 lens, the 3-2 lens and the 3-3 lens are arranged in sequence from the object side to the image side along the optical axis, and these lenses are adjacent to each other. When the imaging lens of the present invention meets the above characteristics and does not require other additional features or conditions, the basic functions of the imaging lens of the present invention can be achieved.
其中第一透鏡群包括一1-1透鏡及一1-2透鏡,1-1透鏡為雙凸透鏡具有正屈光力,且包括一凸面朝向物側及另一凸面朝向像側,1-2透鏡具有正屈光力,且包括一凸面朝向物側。第二透鏡群包括一2-1透鏡及一2-2透鏡,2-1透鏡具有負屈光力且包括一凹面朝向像側,2-2透鏡具有負屈光力且包括一凹面朝向物側。第三透鏡群可更包括一3-4透鏡設置於3-3透鏡與第四透鏡群之間,3-1透鏡為雙凸透鏡,且包括一凸面朝向物側及另一凸面朝向像側,3-2透鏡具有正屈光力且包括一凸面朝向物側,3-3透鏡為雙凹透鏡具有負屈光力,且可更包括另一凹面朝向像側,3-4透鏡為彎月型透鏡具有負屈光力,且包括一凸面朝向物側及一凹面朝向像側。第四透鏡群包括一4-1透鏡,4-1透鏡具有正屈光力且包括一凸面朝向物側。1-1透鏡及1-2透鏡沿著光軸從物側至像側依序排列。2-1透鏡及2-2透鏡沿著光軸從物側至像側依序排列。 The first lens group includes a 1-1 lens and a 1-2 lens. The 1-1 lens is a biconvex lens with positive refractive power and includes a convex surface facing the object side and another convex surface facing the image side. The 1-2 lens has a positive refractive power. refractive power, and includes a convex surface facing the object side. The second lens group includes a 2-1 lens and a 2-2 lens. The 2-1 lens has negative refractive power and includes a concave surface facing the image side. The 2-2 lens has negative refractive power and includes a concave surface facing the object side. The third lens group may further include a 3-4 lens disposed between the 3-3 lens and the fourth lens group. The 3-1 lens is a biconvex lens and includes a convex surface facing the object side and another convex surface facing the image side. 3 -2 lens has positive refractive power and includes a convex surface facing the object side, 3-3 lens is a biconcave lens with negative refractive power, and may further include another concave surface facing the image side, 3-4 lens is a meniscus lens with negative refractive power, and It includes a convex surface facing the object side and a concave surface facing the image side. The fourth lens group includes a 4-1 lens. The 4-1 lens has positive refractive power and includes a convex surface facing the object side. The 1-1 lens and the 1-2 lens are arranged in sequence from the object side to the image side along the optical axis. The 2-1 lens and the 2-2 lens are arranged in sequence from the object side to the image side along the optical axis.
其中第四透鏡群可更包括一4-2透鏡設置於第三透鏡群與4-1透鏡之間,其中1-2透鏡為彎月型透鏡,且可更包括一凹面朝向像側。2-1透鏡為彎月型透鏡,且可更包括一凸面朝向物側。2-2透鏡為彎月型透鏡,且可更包括一凸面朝向像側。3-2透鏡為彎月型透鏡,且可更包括一凹面朝向像側。4-1透鏡為雙凸透鏡,且可更包括另一凸面朝向像側。4-2透鏡為彎月型透鏡具有負屈光力,且包括一凹面朝向物側及一凸面朝向像側。 The fourth lens group may further include a 4-2 lens disposed between the third lens group and the 4-1 lens, wherein the 1-2 lens is a meniscus lens and may further include a concave surface facing the image side. The 2-1 lens is a meniscus lens and may further include a convex surface facing the object side. The 2-2 lens is a meniscus lens and may further include a convex surface facing the image side. The 3-2 lens is a meniscus lens and may further include a concave surface facing the image side. The 4-1 lens is a biconvex lens and may further include another convex surface facing the image side. The 4-2 lens is a meniscus lens with negative refractive power and includes a concave surface facing the object side and a convex surface facing the image side.
其中第一透鏡群可更包括一1-3透鏡設置於物側與1-1透鏡之間,其中3-2透鏡為雙凸透鏡,且可更包括另一凸面朝向像側。4-1透鏡為彎月型透鏡,且可更包括一凹面朝向像側。1-3透鏡為彎月型透鏡具有負屈光力,且包括一凸面朝向物側及一凹面朝向該像側。 The first lens group may further include a 1-3 lens disposed between the object side and the 1-1 lens, wherein the 3-2 lens is a biconvex lens, and may further include another convex surface facing the image side. The 4-1 lens is a meniscus lens and may further include a concave surface facing the image side. Lens 1-3 is a meniscus lens with negative refractive power, and includes a convex surface facing the object side and a concave surface facing the image side.
其中1-2透鏡為雙凸透鏡且可更包括另一凸面朝向像側。2-1透鏡為雙凹透鏡且可更包括另一凹面朝向物側。2-2透鏡為雙凹透鏡且可更包括另一凹面朝向像側。 The 1-2 lens is a biconvex lens and may further include another convex surface facing the image side. The 2-1 lens is a biconcave lens and may further include another concave surface facing the object side. The 2-2 lens is a biconcave lens and may further include another concave surface facing the image side.
其中第二透鏡群可更包括一2-3透鏡設置於2-2透鏡與第三透鏡群之間,其中1-2透鏡為彎月型透鏡且可更包括一凹面朝向像側。2-1透鏡為彎月型透鏡且可更包括一凸面朝向物側。2-2透鏡為彎月型透鏡且可更包括一凸面朝向像側。2-3透鏡為彎月型透鏡具有正屈光力,且包括一凸面朝向物側及一凹面朝向像側。 The second lens group may further include a 2-3 lens disposed between the 2-2 lens and the third lens group, wherein the 1-2 lens is a meniscus lens and may further include a concave surface facing the image side. The 2-1 lens is a meniscus lens and may further include a convex surface facing the object side. The 2-2 lens is a meniscus lens and may further include a convex surface facing the image side. The 2-3 lens is a meniscus lens with positive refractive power and includes a convex surface facing the object side and a concave surface facing the image side.
其中第三透鏡群可更包括一光圈設置於第二透鏡群與3-1透鏡之間。 The third lens group may further include an aperture disposed between the second lens group and the 3-1 lens.
其中此等透鏡群間距可沿著光軸改變,以使成像鏡頭由一廣角端變焦至一中間端再變焦至一望遠端以改變焦距,第四透鏡群可沿著光軸移動以進行對焦。 The distance between these lens groups can be changed along the optical axis, so that the imaging lens can zoom from a wide-angle end to an intermediate end and then to a telephoto end to change the focal length. The fourth lens group can move along the optical axis to focus.
其中成像鏡頭至少滿足以下其中一條件:-0.34度/mmFOV/f10.49度/mm;-0.36fG1/f10.68;-0.13fG2/fG230.55;18TTL/TG3474;其中,FOV為成像鏡頭之一最大視場,f1為最靠近物側之一透鏡之一有效焦距,fG1為第一透鏡群之一有效焦距,fG2為第二透鏡群之一有效焦距,fG23為第二透鏡群中最靠近像側之一透鏡之一有效焦距, TTL為第一透鏡群中最靠近物側之一透鏡之一物側面至一成像面沿著光軸之一間距,TG34為第三透鏡群中最靠近像側之一透鏡沿著光軸之一厚度。 The imaging lens meets at least one of the following conditions: -0.34 degrees/mm FOV/f1 0.49 degrees/mm; -0.36 fG1/f1 0.68;-0.13 fG2/fG23 0.55;18 TTL/TG34 74; Among them, FOV is the maximum field of view of one of the imaging lenses, f1 is the effective focal length of one of the lenses closest to the object side, fG1 is the effective focal length of one of the first lens group, fG2 is the effective focal length of one of the second lens group, fG23 is the effective focal length of the lens closest to the image side in the second lens group, TTL is the distance along the optical axis from the object side of the lens closest to the object side in the first lens group to an imaging surface, TG34 It is the thickness of the lens closest to the image side in the third lens group along the optical axis.
其中成像鏡頭至少滿足以下其中一條件:90VdG1+VdG3107;-3.9(L1R1×L1R2)/(L2R1×L2R2)-0.05;65VdG31+VdG34100;其中,VdG1為第一透鏡群之全部透鏡之一平均阿貝係數,VdG3為第三透鏡群之全部透鏡之一平均阿貝係數,L1R1為最靠近物側之一透鏡之一物側面之一曲率半徑,L1R2為最靠近物側之透鏡之一像側面之一曲率半徑,L2R1為第二靠近物側之一透鏡之一物側面之一曲率半徑,L2R2為第二靠近物側之透鏡之一像側面之一曲率半徑,VdG31為第三透鏡群中最靠近物側之一透鏡之一阿貝係數,VdG34為第三透鏡群中最靠近像側之一透鏡之一阿貝係數。 The imaging lens meets at least one of the following conditions: 90 VdG1+VdG3 107;-3.9 (L1R1×L1R2)/(L2R1×L2R2) -0.05;65 VdG31+VdG34 100; where VdG1 is the average Abbe coefficient of all the lenses in the first lens group, VdG3 is the average Abbe coefficient of all the lenses in the third lens group, and L1R1 is the object side of the lens closest to the object side. A radius of curvature, L1R2 is the radius of curvature of the image side of the lens closest to the object side, L2R1 is the radius of curvature of the object side of the lens closest to the object side, L2R2 is the radius of curvature of the image side of the lens closest to the object side The radius of curvature of an image side, VdG31 is the Abbe coefficient of one of the lenses closest to the object side in the third lens group, and VdG34 is the Abbe coefficient of one of the lenses closest to the image side in the third lens group.
為使本發明之上述目的、特徵、和優點能更明顯易懂,下文特舉較佳實施例並配合所附圖式做詳細說明。 In order to make the above-mentioned objects, features, and advantages of the present invention more clearly understood, preferred embodiments are described in detail below along with the accompanying drawings.
1、2、3:成像鏡頭 1, 2, 3: Imaging lens
LG11、LG21、LG31:第一透鏡群 LG11, LG21, LG31: First lens group
LG12、LG22、LG32:第二透鏡群 LG12, LG22, LG32: Second lens group
LG13、LG23、LG33:第三透鏡群 LG13, LG23, LG33: Third lens group
LG14、LG24、LG34:第四透鏡群 LG14, LG24, LG34: Fourth lens group
OF1、OF2、OF3:濾光片 OF1, OF2, OF3: optical filter
CG1、CG2、CG3:保護玻璃 CG1, CG2, CG3: Protective glass
IMA1、IMA2、IMA3:成像面 IMA1, IMA2, IMA3: imaging surface
L11、L21、L31 1-1:透鏡 L11, L21, L31 1-1: Lens
L12、L22、L32 1-2:透鏡 L12, L22, L32 1-2: Lens
L13、L23、L33 2-1:透鏡 L13, L23, L33 2-1: Lens
L14、L24、L34 2-2:透鏡 L14, L24, L34 2-2: Lens
L15、L25、L35 3-1:透鏡 L15, L25, L35 3-1: Lens
L16、L26、L36 3-2:透鏡 L16, L26, L36 3-2: Lens
L17、L27、L37 3-3:透鏡 L17, L27, L37 3-3: Lens
L18、L28、L38 3-4:透鏡 L18, L28, L38 3-4: Lens
L19、L29、L39 4-1:透鏡 L19, L29, L39 4-1: Lens
L110、L310 1-3:透鏡 L110, L310 1-3: Lens
L210 4-2:透鏡 L210 4-2: Lens
L111 2-3:透鏡 L111 2-3: Lens
ST1、ST2、ST3:光圈 ST1, ST2, ST3: Aperture
OA1、OA2、OA3:光軸 OA1, OA2, OA3: optical axis
S13、S21、S33 1-1:透鏡物側面 S13, S21, S33 1-1: Lens object side
S14、S22、S34 1-1:透鏡像側面 S14, S22, S34 1-1: Lens image side
S15、S23、S35 1-2:透鏡物側面 S15, S23, S35 1-2: Lens object side
S16、S24、S36 1-2:透鏡像側面 S16, S24, S36 1-2: Lens image side
S17、S25、S37 2-1:透鏡物側面 S17, S25, S37 2-1: Lens object side
S18、S26、S38 2-1:透鏡像側面 S18, S26, S38 2-1: Lens image side
S19、S27、S39 2-2:透鏡物側面 S19, S27, S39 2-2: Lens object side
S110、S28、S310 2-2:透鏡像側面 S110, S28, S310 2-2: Lens image side
S113、S29、S311:光圈面 S113, S29, S311: Aperture surface
S114、S210、S312:3-1透鏡物側面 S114, S210, S312:3-1 lens object side
S115、S211、S313:3-1透鏡像側面 S115, S211, S313:3-1 lens image side
S116、S212、S314:3-2透鏡物側面 S116, S212, S314: 3-2 lens object side
S117、S213、S315:3-2透鏡像側面 S117, S213, S315: 3-2 lens image side
S118、S214、S316:3-3透鏡物側面 S118, S214, S316: 3-3 lens object side
S119、S215、S317:3-3透鏡像側面 S119, S215, S317: 3-3 lens image side
S120、S216、S318:3-4透鏡物側面 S120, S216, S318: 3-4 lens object side
S121、S217、S319:3-4透鏡像側面 S121, S217, S319: 3-4 lens image side
S122、S220、S320:4-1透鏡物側面 S122, S220, S320: 4-1 lens object side
S123、S221、S321:4-1透鏡像側面 S123, S221, S321: 4-1 lens image side
S11、S31:1-3透鏡物側面 S11, S31:1-3 lens object side
S12、S32:1-3透鏡像側面 S12, S32:1-3 lens image side
S218:4-2透鏡物側面 S218:4-2 lens object side
S219:4-2透鏡像側面 S219:4-2 lens image side
S111:2-3透鏡物側面 S111:2-3 lens object side
S112:2-3透鏡像側面 S112:2-3 lens image side
S124、S222、S322:濾光片物側面 S124, S222, S322: filter side
S125、S223、S323:濾光片像側面 S125, S223, S323: filter image side
S126、S224、S324:保護玻璃物側面 S126, S224, S324: Protect the sides of glass objects
S127、S225、S325:保護玻璃像側面 S127, S225, S325: Protective glass like side
第1A、1B、1C圖係依據本發明之成像鏡頭之第一實施例處於一廣角端、一中間端及、一望遠端的透鏡配置與光路示意圖。 Figures 1A, 1B, and 1C are schematic diagrams of the lens configuration and optical path of the first embodiment of the imaging lens according to the present invention at a wide-angle end, an intermediate end, and a telephoto end.
第2A、2B、2C圖係依據本發明之成像鏡頭之第一實施例處於廣角端的縱向像差圖(Longitudinal Aberration)、場曲(Field Curvature)圖、畸變(Distortion)圖。 Figures 2A, 2B, and 2C are longitudinal aberration (Longitudinal Aberration), field curvature (Field Curvature), and distortion (Distortion) diagrams at the wide-angle end of the first embodiment of the imaging lens according to the present invention.
第3A、3B、3C圖係依據本發明之成像鏡頭之第一實施例處於中間端的縱向像差圖、場曲圖、畸變圖。 Figures 3A, 3B, and 3C are longitudinal aberration diagrams, field curvature diagrams, and distortion diagrams at the intermediate end of the first embodiment of the imaging lens according to the present invention.
第4A、4B、4C圖係依據本發明之成像鏡頭之第一實施例處於望遠端的縱向像差圖、場曲圖、畸變圖。 Figures 4A, 4B, and 4C are longitudinal aberration diagrams, field curvature diagrams, and distortion diagrams at the telephoto end of the first embodiment of the imaging lens according to the present invention.
第5A、5B、5C圖係依據本發明之成像鏡頭之第二實施例處於一廣角端、一中間端及、一望遠端的透鏡配置與光路示意圖。 Figures 5A, 5B, and 5C are schematic diagrams of the lens configuration and optical path at a wide-angle end, an intermediate end, and a telephoto end of the second embodiment of the imaging lens according to the present invention.
第6A、6B、6C圖係依據本發明之成像鏡頭之第二實施例處於廣角端的縱向像差圖、場曲圖、畸變圖。 Figures 6A, 6B, and 6C are longitudinal aberration diagrams, field curvature diagrams, and distortion diagrams at the wide-angle end of the imaging lens according to the second embodiment of the present invention.
第7A、7B、7C圖係依據本發明之成像鏡頭之第二實施例處於中間端的縱向像差圖、場曲圖、畸變圖。 Figures 7A, 7B, and 7C are longitudinal aberration diagrams, field curvature diagrams, and distortion diagrams at the intermediate end of the imaging lens according to the second embodiment of the present invention.
第8A、8B、8C圖係依據本發明之成像鏡頭之第二實施例處於望遠端的縱向像差圖、場曲圖、畸變圖。 Figures 8A, 8B, and 8C are longitudinal aberration diagrams, field curvature diagrams, and distortion diagrams at the telephoto end of the imaging lens according to the second embodiment of the present invention.
第9A、9B、9C圖係依據本發明之成像鏡頭之第三實施例處於一廣角端、一中間端及、一望遠端的透鏡配置與光路示意圖。 Figures 9A, 9B, and 9C are schematic diagrams of the lens configuration and optical path at a wide-angle end, an intermediate end, and a telephoto end of the third embodiment of the imaging lens according to the present invention.
第10A、10B、10C圖係依據本發明之成像鏡頭之第三實施例處於廣角端的縱向像差圖、場曲圖、畸變圖。 Figures 10A, 10B, and 10C are longitudinal aberration diagrams, field curvature diagrams, and distortion diagrams at the wide-angle end of the imaging lens according to the third embodiment of the present invention.
第11A、11B、11C圖係依據本發明之成像鏡頭之第三實施例處於中間端的縱向像差圖、場曲圖、畸變圖。 Figures 11A, 11B, and 11C are longitudinal aberration diagrams, field curvature diagrams, and distortion diagrams at the intermediate end of the third embodiment of the imaging lens according to the present invention.
第12A、12B、12C圖係依據本發明之成像鏡頭之第三實施例處於望遠端的縱向像差圖、場曲圖、畸變圖。 Figures 12A, 12B, and 12C are longitudinal aberration diagrams, field curvature diagrams, and distortion diagrams at the telephoto end of the imaging lens according to the third embodiment of the present invention.
本發明提供一種成像鏡頭,包括:一第一透鏡群,此第一透鏡群具有正屈光力;一第二透鏡群,此第二透鏡群具有負屈光力,此第二透鏡群至少包括二具有負屈光力透鏡;一第三透鏡群,此第三透鏡群具 有正屈光力,此第三透鏡群包括一3-1透鏡、一3-2透鏡及一3-3透鏡,此3-1透鏡具有正屈光力,此3-3透鏡包括一凹面朝向一物側;及一第四透鏡群,此第四透鏡群具有正屈光力;其中第一透鏡群、第二透鏡群、第三透鏡群及第四透鏡群沿著一光軸從物側至一像側依序排列;其中3-1透鏡、3-2透鏡及3-3透鏡沿著光軸從物側至像側依序排列,且此等透鏡間彼此相鄰。當本發明之成像鏡頭滿足上述特徵,為本發明之一較佳實施例。 The invention provides an imaging lens, including: a first lens group with positive refractive power; a second lens group with negative refractive power; the second lens group includes at least two lenses with negative refractive power. Lens; a third lens group, this third lens group has With positive refractive power, the third lens group includes a 3-1 lens, a 3-2 lens and a 3-3 lens, the 3-1 lens has positive refractive power, and the 3-3 lens includes a concave surface facing an object side; And a fourth lens group, this fourth lens group has positive refractive power; wherein the first lens group, the second lens group, the third lens group and the fourth lens group are sequentially along an optical axis from the object side to an image side. Arranged; the 3-1 lens, 3-2 lens and 3-3 lens are arranged in sequence from the object side to the image side along the optical axis, and these lenses are adjacent to each other. When the imaging lens of the present invention meets the above characteristics, it is a preferred embodiment of the present invention.
本發明之成像鏡頭為可變焦距鏡頭,其第一透鏡群固定不動,第二透鏡群、第三透鏡群及第四透鏡可沿著光軸移動以改變各透鏡群之間距,使得成像鏡頭由一廣角端變焦至一中間端再變焦至一望遠端。成像鏡頭之各實施例由廣角端變焦至望遠端其變焦倍率大約為3倍。 The imaging lens of the present invention is a variable focal length lens. The first lens group is fixed, and the second lens group, the third lens group and the fourth lens can move along the optical axis to change the distance between each lens group, so that the imaging lens can be changed from Zoom from a wide-angle end to a mid-range end and then zoom to a telephoto end. The zoom magnification of each embodiment of the imaging lens from the wide-angle end to the telephoto end is approximately 3 times.
請參閱底下表一、表三及表五,其中表一、表三及表五分别為依據本發明之成像鏡頭之第一實施例至第三實施例的各透鏡之相關參數表。 Please refer to Table 1, Table 3 and Table 5 below. Table 1, Table 3 and Table 5 are respectively the relevant parameter tables of each lens of the first to third embodiments of the imaging lens according to the present invention.
第1A、1B、1C圖係依據本發明之成像鏡頭之第一實施例處於一廣角端、一中間端、一望遠端的透鏡配置與光路示意圖,第5A、5B、5C圖係依據本發明之成像鏡頭之第二實施例處於一廣角端、一中間端、一望遠端的透鏡配置與光路示意圖,第9A、9B、9C圖係依據本發明之成像鏡頭之第三實施例處於一廣角端、一中間端、一望遠端的透鏡配置與光路示意圖。其中成像鏡頭1包括一第一透鏡群LG11、一第二透鏡群LG12、一第三透鏡群LG13及一第四透鏡群LG14,第一透鏡群LG11具有正屈光力且包括一1-3透鏡L110、一1-1透鏡L11及一1-2透鏡L12,第二透鏡群LG12具有負屈光力且包括一2-1透鏡L13、一2-2透鏡L14及一2-3透鏡L111,
第三透鏡群LG13具有正屈光力且包括一光圈ST1、一3-1透鏡L15、一3-2透鏡L16、一3-3透鏡L17及一3-4透鏡L18,第四透鏡群LG14具有正屈光力且包括一4-1透鏡L19。成像鏡頭2包括一第一透鏡群LG21、一第二透鏡群LG22、一第三透鏡群LG23及一第四透鏡群LG24,第一透鏡群LG21具有正屈光力且包括一1-1透鏡L21及一1-2透鏡L22,第二透鏡群LG22具有負屈光力且包括一2-1透鏡L23及一2-2透鏡L24,第三透鏡群LG23具有正屈光力且包括一光圈ST2、一3-1透鏡L25、一3-2透鏡L26、一3-3透鏡L27及一3-4透鏡L28,第四透鏡群LG24具有正屈光力且包括一4-2透鏡L210及一4-1透鏡L29。成像鏡頭3包括一第一透鏡群LG31、一第二透鏡群LG32、一第三透鏡群LG33及一第四透鏡群LG34,第一透鏡群LG31具有正屈光力且包括一1-3透鏡L310、一1-1透鏡L31及一1-2透鏡L32,第二透鏡群LG32具有負屈光力且包括一2-1透鏡L33及一2-2透鏡L34,第三透鏡群LG33具有正屈光力且包括一光圈ST3、一3-1透鏡L35、一3-2透鏡L36、一3-3透鏡L37及一3-4透鏡L38,第四透鏡群LG34具有正屈光力且包括一4-1透鏡L39。
Figures 1A, 1B, and 1C are schematic diagrams of the lens configuration and optical path of the first embodiment of the imaging lens according to the present invention at a wide-angle end, an intermediate end, and a telephoto end. Figures 5A, 5B, and 5C are schematic diagrams of the imaging lens according to the present invention. A schematic diagram of the lens configuration and optical path of the second embodiment of the imaging lens at a wide-angle end, an intermediate end, and a telephoto end. Figures 9A, 9B, and 9C show the third embodiment of the imaging lens according to the present invention at a wide-angle end, Schematic diagram of the lens configuration and optical path of one intermediate end and one telephoto end. The
1-1透鏡L11、L21、L31為雙凸透鏡具有正屈光力,由玻璃材質製成,其物側面S13、S21、S33為凸面,像側面S14、S22、S34為凸面,物側面S13、S21、S33與像側面S14、S22、S34皆為球面表面。1-2透鏡L12、L22、L32具有正屈光力,由玻璃材質製成,其物側面S15、S23、S35為凸面,物側面S15、S23、S35與像側面S16、S24、S36皆為球面表面。2-1透鏡L13、L23、L33具有負屈光力,由玻璃材質製成,其像側面S18、S26、S38為凹面,物側面S17、S25、S37與像側面S18、S26、S38皆為球面表面。 2-2透鏡L14、L24、L34具有負屈光力,由玻璃材質製成,其物側面S19、S27、S39為凹面,物側面S19、S27、S39與像側面S110、S28、S310皆為球面表面。3-1透鏡L15、L25、L35為雙凸透鏡具有正屈光力,由玻璃材質製成,其物側面S114、S210、S312為凸面,像側面S115、S211、S313為凸面,物側面S114、S210、S312與像側面S115、S211、S313皆為球面表面。3-2透鏡L16、L26、L36具有正屈光力,由玻璃材質製成,其物側面S116、S212、S314為凸面,物側面S116、S212、S314與像側面S117、S213、S315皆為球面表面。3-3透鏡L17、L27、L37為雙凹透鏡具有負屈光力,由玻璃材質製成,其物側面S118、S214、S316為凹面,像側面S119、S215、S317為凹面,物側面S118、S214、S316與像側面S119、S215、S317皆為球面表面。3-4透鏡L18、L28、L38為彎月型透鏡具有負屈光力,由玻璃材質製成,其物側面S120、S216、S318為凸面,像側面S121、S217、S319為凹面,物側面S120、S216、S318與像側面S121、S217、S319皆為球面表面。4-1透鏡L19、L29、L39具有正屈光力,由玻璃材質製成,其物側面S122、S220、S320為凸面,物側面S122、S220、S320與像側面S123、S221、S321皆為球面表面。 1-1 lenses L11, L21, and L31 are biconvex lenses with positive refractive power and are made of glass. The object side surfaces S13, S21, and S33 are convex surfaces, the image side surfaces S14, S22, and S34 are convex surfaces, and the object side surfaces S13, S21, and S33 are convex surfaces. The image side surfaces S14, S22 and S34 are all spherical surfaces. 1-2 lenses L12, L22, and L32 have positive refractive power and are made of glass. The object side surfaces S15, S23, and S35 are convex surfaces, and the object side surfaces S15, S23, and S35 and the image side surfaces S16, S24, and S36 are all spherical surfaces. 2-1 lenses L13, L23, and L33 have negative refractive power and are made of glass. The image side surfaces S18, S26, and S38 are concave surfaces, and the object side surfaces S17, S25, and S37 and the image side surfaces S18, S26, and S38 are all spherical surfaces. 2-2 lenses L14, L24, and L34 have negative refractive power and are made of glass. The object side surfaces S19, S27, and S39 are concave surfaces, and the object side surfaces S19, S27, and S39 and the image side surfaces S110, S28, and S310 are all spherical surfaces. 3-1 Lenses L15, L25, and L35 are biconvex lenses with positive refractive power and are made of glass. The object side surfaces S114, S210, and S312 are convex surfaces, the image side surfaces S115, S211, and S313 are convex surfaces, and the object side surfaces S114, S210, and S312 are convex surfaces. The image side surfaces S115, S211 and S313 are all spherical surfaces. 3-2 lenses L16, L26, and L36 have positive refractive power and are made of glass. The object side surfaces S116, S212, and S314 are convex surfaces, and the object side surfaces S116, S212, and S314 and the image side surfaces S117, S213, and S315 are all spherical surfaces. 3-3 Lenses L17, L27, and L37 are biconcave lenses with negative refractive power and are made of glass. The object side surfaces S118, S214, and S316 are concave surfaces, the image side surfaces S119, S215, and S317 are concave surfaces, and the object side surfaces S118, S214, and S316 are concave surfaces. The image sides S119, S215 and S317 are all spherical surfaces. 3-4 lenses L18, L28, and L38 are meniscus lenses with negative refractive power and are made of glass. The object side surfaces S120, S216, and S318 are convex surfaces, the image side surfaces S121, S217, and S319 are concave surfaces, and the object side surfaces S120 and S216 , S318 and image side surfaces S121, S217 and S319 are all spherical surfaces. 4-1 lenses L19, L29, and L39 have positive refractive power and are made of glass. The object side surfaces S122, S220, and S320 are convex surfaces. The object side surfaces S122, S220, and S320 and the image side surfaces S123, S221, and S321 are all spherical surfaces.
另外,成像鏡頭1、2、3至少滿足以下條件(1)至條件(7)其
中一條件,為本發明較佳實施例:
In addition, the
其中,FOV為第一實施例至第三實施例中,成像鏡頭1、2、3之一最大視場,f1為第一實施例至第三實施例中,最靠近物側之一透鏡L110、L21、L310之一有效焦距,fG2為第一實施例至第三實施例中,第二透鏡群LG12、LG22、LG32之一有效焦距,fG23為第一實施例至第三實施例中,第二透鏡群LG12、LG22、LG32中最靠近像側之透鏡L111、L24、L34之一有效焦距,TTL為第一實施例至第三實施例中,第一透鏡群LG11、LG21、LG31中最靠近物側之透鏡L110、L21、L310之物側面S11、S21、S31至成像面IMA1、IMA2、IMA3沿著光軸OA1、OA2、OA3之一間距,TG34為第一實施例至第三實施例中,第三透鏡群LG13、LG23、LG33中最靠近像側之透鏡L18、L28、L38沿著光軸OA1、OA2、OA3之一厚度,VdG1為第一實施例至第三實施例中,第一透鏡群LG11、LG21、LG31之全部透鏡之一平均阿貝係數,VdG3為第一實施例至第三實施例中,第三透鏡群LG13、LG23、LG33之全部透鏡之一平均阿貝係數,L1R1為第一實施例至第三實施例中,最靠近物側之透鏡L110、L21、L310之物側面S11、S21、S31之一曲率半徑,L1R2為第一實施例至第三實施例中,最靠近物側之透鏡L110、L21、L310之像側面S12、S22、S32之一曲率半徑,L2R1為第一實施例至第三實施例中,第二靠近物側之透鏡L11、L22、L31之物側面S13、S23、S33之一曲率半徑,L1R2為第一實施例至第三實施例中,第二靠近物側之透鏡L11、L22、L31之像側面S14、S24、S34之一曲率半徑,VdG31為第一實施例至第三實施例中,第三透鏡群LG13、LG23、LG33中最靠近
物側之透鏡L15、L25、L35之一阿貝係數,VdG34為第一實施例至第三實施例中,第三透鏡群LG13、LG23、LG33中最靠近像側之透鏡L18、L28、L38之一阿貝係數。使得成像鏡頭1、2、3能有效的縮短鏡頭總長度、有效的提升解析度、有效的修正像差及實現光學變焦功能。
Wherein, FOV is the maximum field of view of one of the
當滿足條件(1):-0.34度/mmFOV/f10.49度/mm時,可避免最靠近物側的透鏡屈光力過大,有利於最靠近物側的透鏡製作。當滿足條件(2):-0.36fG1/f10.68時,可有效降低製造敏感度,以提升影像品質。當滿足條件(3):-0.13fG2/fG230.55時,可提升成像鏡頭之相對照度。當滿足條件(4):18TTL/TG3474時,可有效縮短成像鏡頭總長度。當滿足條件(5):90VdG1+VdG3107時,可有效降低色差,提升影像品質。當滿足條件(6):-3.9(L1R1×L1R2)/(L2R1×L2R2)-0.05時,可有效降低製造敏感度,有利於成像鏡頭製作。當滿足條件(7):65VdG31+VdG34100時,可有效降低成像鏡頭色散值。當同時滿足條件(1)、(5)及(7):-0.34度/mmFOV/f10.49度/mm;90VdG1+VdG3107;及65VdG31+VdG34100時,可有效降低色散,提高影像品質。 When condition (1) is met: -0.34 degrees/mm FOV/f1 At 0.49 degrees/mm, it can avoid the refractive power of the lens closest to the object side being too large, which is beneficial to the production of the lens closest to the object side. When condition (2) is met: -0.36 fG1/f1 At 0.68, the manufacturing sensitivity can be effectively reduced to improve image quality. When condition (3) is met: -0.13 fG2/fG23 At 0.55, the relative illumination of the imaging lens can be increased. When condition (4) is met: 18 TTL/TG34 74 hours, which can effectively shorten the total length of the imaging lens. When condition (5) is met: 90 VdG1+VdG3 At 107, it can effectively reduce chromatic aberration and improve image quality. When condition (6) is met: -3.9 (L1R1×L1R2)/(L2R1×L2R2) When -0.05, the manufacturing sensitivity can be effectively reduced, which is beneficial to the production of imaging lenses. When condition (7) is met: 65 VdG31+VdG34 When 100, it can effectively reduce the dispersion value of the imaging lens. When conditions (1), (5) and (7) are met at the same time: -0.34 degrees/mm FOV/f1 0.49 degrees/mm; 90 VdG1+VdG3 107; and 65 VdG31+VdG34 At 100, it can effectively reduce dispersion and improve image quality.
現詳細說明本發明之成像鏡頭之第一實施例。請參閱第1A圖、第1B圖及第1C圖,成像鏡頭1包括一第一透鏡群LG11、一第二透鏡群LG12、一第三透鏡群LG13、一第四透鏡群LG14、一濾光片OF1及一保護玻璃CG1。第一透鏡群LG11、第二透鏡群LG12、第三透鏡群LG13、第四透鏡群LG14、濾光片OF1及保護玻璃CG1沿著一光軸OA1從一物側至一像側依序排列。第一透鏡群LG11包括一1-3透鏡L110、一1-1透鏡L11及一1-2透鏡L12,1-3透鏡L110、1-1透鏡L11及1-2透鏡L12沿著光軸
OA1從物側至像側依序排列。第二透鏡群LG12包括一2-1透鏡L13、一2-2透鏡L14及一2-3透鏡L111,2-1透鏡L13、2-2透鏡L14及2-3透鏡L111沿著光軸OA1從物側至像側依序排列。第三透鏡群LG13包括一光圈ST1、一3-1透鏡L15、一3-2透鏡L16、一3-3透鏡L17及一3-4透鏡L18,光圈ST1、3-1透鏡L15、3-2透鏡L16、3-3透鏡L17及3-4透鏡L18沿著光軸OA1從物側至像側依序排列。第四透鏡群LG14包括一4-1透鏡L19。成像時,來自物側之光線最後成像於一成像面IMA1上。
The first embodiment of the imaging lens of the present invention will now be described in detail. Please refer to Figure 1A, Figure 1B and Figure 1C. The
成像鏡頭1由廣角端(如第1A圖所示)變焦至中間端(如第1B圖所示)再變焦至望遠端(如第1C圖所示)時,第一透鏡群LG11固定不動,第二透鏡群LG12沿著光軸OA1往像側移動,第三透鏡群LG13沿著光軸OA1往物側移動,第四透鏡群LG14沿著光軸OA1往像側移動,使得第一透鏡群LG11與第二透鏡群LG12之間距變大、第二透鏡群LG12與第三透鏡群LG13之間距變小、第三透鏡群LG13與第四透鏡群LG14之間距變大,上述間距隨著成像鏡頭1由廣角端變焦至中間端再變焦至望遠端而變動之情形,可由第1A圖、第1B圖及第1C圖中明顯看出。第一實施例之成像鏡頭1由廣角端(如第1A圖所示)變焦至望遠端(如第1C圖所示)時,其變焦倍率約為3倍(71.95221mm/24.04484mm≒2.99)。第四透鏡群LG14可沿著光軸OA1移動,以使成像鏡頭1進行對焦。根據【實施方式】第一至五段落,其中:1-3透鏡L110為彎月型透鏡具有負屈光力,由玻璃材質製成,其物側面S11為凸面,像側面S12為凹面,物側面S11與像側面S12皆為球面表面;1-2透鏡L12為彎月型透鏡,其像側面S16為凹面;2-1透鏡L13為彎月型透鏡,其物側面S17為凸面;2-2透鏡L14為彎月型透鏡,其像側面S110
為凹面;2-3透鏡L111為彎月型透鏡具有正屈光力,由玻璃材質製成,其物側面S111為凸面,像側面S112為凹面,物側面S111與像側面S112皆為球面表面;3-2透鏡L16為雙凸透鏡,其像側面S117為凸面,4-1透鏡L19為彎月型透鏡,其像側面S123為凹面;濾光片OF1其物側面S124與像側面S125皆為平面;保護玻璃CG1其物側面S126與像側面S127皆為平面;利用上述透鏡、光圈ST1及滿足條件(1)至條件(7)其中至少一條件之設計,使得成像鏡頭1能有效的縮短鏡頭總長度、有效的提升解析度、有效的修正像差及實現光學變焦功能。
When the
表一為第1A圖、第1B圖、第1C圖中成像鏡頭1分別處於廣角端、中間端及望遠端時之各透鏡之相關參數表。
Table 1 is a table of relevant parameters of each lens when the
表二為第一實施例之成像鏡頭1之相關參數值及其對應條件(1)至條件(7)之計算值,由表二可知,第一實施例之成像鏡頭1皆能滿足條件(1)至條件(7)之要求。
Table 2 shows the relevant parameter values of the
另外,第一實施例之成像鏡頭1的光學性能也可達到要求。由第2A圖可看出,第一實施例之成像鏡頭1於廣角端,其縱向像差介於-0.005mm至0mm之間。由第2B圖可看出,第一實施例之成像鏡頭1於廣角端其場曲介於-0.04mm至0.01mm之間。由第2C圖可看出,第一實施例
之成像鏡頭1於廣角端其畸變介於-2%至0%之間。由第3A圖可看出,第一實施例之成像鏡頭1於中間端,其縱向像差介於-0.005mm至0.01mm之間。由第3B圖可看出,第一實施例之成像鏡頭1於中間端其場曲介於-0.02mm至0.01mm之間。由第3C圖可看出,第一實施例之成像鏡頭1於中間端其畸變介於0%至2%之間。由第4A圖可看出,第一實施例之成像鏡頭1於望遠端,其縱向像差介於-0.025mm至-0.005mm之間。由第4B圖可看出,第一實施例之成像鏡頭1於望遠端其場曲介於-0.01mm至0.02mm之間。由第4C圖可看出,第一實施例之成像鏡頭1於望遠端其畸變介於0%至2%0之間。顯見第一實施例之成像鏡頭1之縱向像差、場曲、畸變都能被有效修正,從而得到較佳的光學性能。
In addition, the optical performance of the
現詳細說明本發明之成像鏡頭之第二實施例。請參閱第5A圖、第5B圖及第5C圖,成像鏡頭2包括一第一透鏡群LG21、一第二透鏡群LG22、一第三透鏡群LG23、一第四透鏡群LG24、一濾光片OF2及一保護玻璃CG2。第一透鏡群LG21、第二透鏡群LG22、第三透鏡群LG23、第四透鏡群LG24、濾光片OF2及保護玻璃CG2沿著一光軸OA2從一物側至一像側依序排列。第一透鏡群LG21包括一1-1透鏡L21及一1-2透鏡L22,1-1透鏡L21及1-2透鏡L22沿著光軸OA2從物側至像側依序排列。第二透鏡群LG22包括一2-1透鏡L23及一2-2透鏡L24,2-1透鏡L23及2-2透鏡L24沿著光軸OA2從物側至像側依序排列。第三透鏡群LG23包括一光圈ST2、一3-1透鏡L25、一3-2透鏡L26、一3-3透鏡L27及一3-4透鏡L28,光圈ST2、3-1透鏡L25、3-2透鏡L26、3-3透鏡L27及3-4透鏡L28沿著光軸OA2從物側至像側依序排列。第四透鏡群LG24包括一4-2透鏡L210及
一4-1透鏡L29,4-2透鏡L210及4-1透鏡L29沿著光軸OA2從物側至像側依序排列。成像時,來自物側之光線最後成像於一成像面IMA2上。
The second embodiment of the imaging lens of the present invention will now be described in detail. Please refer to Figure 5A, Figure 5B and Figure 5C. The
成像鏡頭2由廣角端(如第5A圖所示)變焦至中間端(如第5B圖所示)再變焦至望遠端(如第5C圖所示)時,第一透鏡群LG21固定不動,第二透鏡群LG22沿著光軸OA2往像側移動,第三透鏡群LG23沿著光軸OA2往物側移動,第四透鏡群LG24沿著光軸OA2往像側移動,使得第一透鏡群LG21與第二透鏡群LG22之間距變大、第二透鏡群LG22與第三透鏡群LG23之間距變小、第三透鏡群LG23與第四透鏡群LG24之間距變大,上述間距隨著成像鏡頭2由廣角端變焦至中間端再變焦至望遠端而變動之情形,可由第5A圖、第5B圖及第5C圖中明顯看出。第二實施例之成像鏡頭2由廣角端(如第5A圖所示)變焦至望遠端(如第5C圖所示)時,其變焦倍率約為3倍(71.9346mm/24.07183mm≒2.99)。第四透鏡群LG24可沿著光軸OA2移動,以使成像鏡頭2進行對焦。根據【實施方式】第一至五段落,其中:1-2透鏡L22為彎月型透鏡,其像側面S24為凹面;2-1透鏡L23為彎月型透鏡,其物側面S25為凸面;2-2透鏡L24為彎月型透鏡,其像側面S28為凸面;3-2透鏡L26為彎月型透鏡,其像側面S213為凹面;4-2透鏡L210為彎月型透鏡具有負屈光力,由玻璃材質製成,其物側面S218為凹面,像側面S219為凸面,物側面S218與像側面S219皆為球面表面;4-1透鏡L29為雙凸透鏡,其像側面S221為凸面;濾光片OF2其物側面S222與像側面S223皆為平面;保護玻璃CG2其物側面S224與像側面S225皆為平面;利用上述透鏡、光圈ST2及滿足條件(1)至條件(7)其中至少一條件之設計,使得成像鏡頭2能有效的縮短鏡頭總長度、有效的提升解析度、有效的修
正像差及實現光學變焦功能。
When the
表三為第5A圖、第5B圖、第5C圖中成像鏡頭2分別處於廣角端、中間端及望遠端時之各透鏡之相關參數表。
Table 3 is a table of relevant parameters of each lens when the
表四為第二實施例之成像鏡頭2之相關參數值及其對應條件(1)至條件(7)之計算值,由表四可知,第二實施例之成像鏡頭2皆能滿足條件(1)至條件(7)之要求。
Table 4 shows the relevant parameter values of the
另外,第二實施例之成像鏡頭2的光學性能也可達到要求。由第6A圖可看出,第二實施例之成像鏡頭2於廣角端,其縱向像差介於-0.005mm至0.025mm之間。由第6B圖可看出,第二實施例之成像鏡頭2於廣角端其場曲介於0mm至0.02mm之間。由第6C圖可看出,第二實施例之成像鏡頭2於廣角端其畸變介於-1%至0%之間。由第7A圖可看出,第二實施例之成像鏡頭2於中間端,其縱向像差介於-0.01mm至0.015mm之間。由第7B圖可看出,第二實施例之成像鏡頭2於中間端其場曲介於-0.01mm至0.01mm之間。由第7C圖可看出,第二實施例之成像鏡頭2於中間端其畸變介於0%至1%之間。由第8A圖可看出,第二實施例之成像鏡頭2於望遠端,其縱向像差介於-0.015mm至0.03mm之間。由第8B圖可看出,第二實施例之成像鏡頭2於望遠端其場曲介於-0.02mm至0.01mm之間。由
第8C圖可看出,第二實施例之成像鏡頭2於望遠端其畸變介於0%至1%之間。顯見第二實施例之成像鏡頭2之縱向像差、場曲、畸變都能被有效修正,從而得到較佳的光學性能。
In addition, the optical performance of the
現詳細說明本發明之成像鏡頭之第三實施例。請參閱第9A圖、第9B圖及第9C圖,成像鏡頭3包括一第一透鏡群LG31、一第二透鏡群LG32、一第三透鏡群LG33、一第四透鏡群LG34、一濾光片OF3及一保護玻璃CG3。第一透鏡群LG31、第二透鏡群LG32、第三透鏡群LG33、第四透鏡群LG34、濾光片OF3及保護玻璃CG3沿著一光軸OA3從一物側至一像側依序排列。第一透鏡群LG21包括一1-3透鏡L310、一1-1透鏡L31及一1-2透鏡L32,1-3透鏡L310、1-1透鏡L31及1-2透鏡L32沿著光軸OA3從物側至像側依序排列。第二透鏡群LG32包括一2-1透鏡L33及一2-2透鏡L34,2-1透鏡L33及2-2透鏡L34沿著光軸OA3從物側至像側依序排列。第三透鏡群LG33包括一光圈ST3、一3-1透鏡L35、一3-2透鏡L36、一3-3透鏡L37及一3-4透鏡L38,光圈ST3、3-1透鏡L35、3-2透鏡L36、3-3透鏡L37及3-4透鏡L38沿著光軸OA3從物側至像側依序排列。第四透鏡群LG34包括一4-1透鏡L39。成像時,來自物側之光線最後成像於一成像面IMA3上。
The third embodiment of the imaging lens of the present invention will now be described in detail. Please refer to Figure 9A, Figure 9B and Figure 9C. The
成像鏡頭3由廣角端(如第9A圖所示)變焦至中間端(如第9B圖所示)再變焦至望遠端(如第9C圖所示)時,第一透鏡群LG31固定不動,第二透鏡群LG32沿著光軸OA3往像側移動,第三透鏡群LG33沿著光軸OA3往物側移動,第四透鏡群LG34沿著光軸OA3往像側移動,使得第一透鏡群LG31與第二透鏡群LG32之間距變大、第二透鏡群LG32與第三透
鏡群LG33之間距變小、第三透鏡群LG33與第四透鏡群LG34之間距變大,上述間距隨著成像鏡頭3由廣角端變焦至中間端再變焦至望遠端而變動之情形,可由第9A圖、第9B圖及第9C圖中明顯看出。第三實施例之成像鏡頭3由廣角端(如第9A圖所示)變焦至望遠端(如第9C圖所示)時,其變焦倍率約為3倍(71.9813mm/24.03277mm≒3.00)。第四透鏡群LG34可沿著光軸OA3移動,以使成像鏡頭3進行對焦。根據【實施方式】第一至五段落,其中:1-3透鏡L310為彎月型透鏡具有負屈光力,由玻璃材質製成,其物側面S31為凸面,像側面S32為凹面,物側面S31與像側面S32皆為球面表面;1-2透鏡L32為雙凸透鏡,其像側面S36為凸面;2-1透鏡L33為雙凹透鏡,其物側面S37為凹面;2-2透鏡L34為雙凹透鏡,其像側面S310為凹面;3-2透鏡L36為雙凸透鏡,其像側面S315為凸面;4-1透鏡L39為彎月型透鏡,其像側面S321為凹面;濾光片OF3其物側面S322與像側面S323皆為平面;保護玻璃CG3其物側面S324與像側面S325皆為平面;利用上述透鏡、光圈ST3及滿足條件(1)至條件(7)其中至少一條件之設計,使得成像鏡頭3能有效的縮短鏡頭總長度、有效的提升解析度、有效的修正像差及實現光學變焦功能。
When the
表五為第9A圖、第9B圖、第9C圖中成像鏡頭3分別處於廣角端、中間端及望遠端時之各透鏡之相關參數表。
Table 5 is a table of relevant parameters of each lens when the
表六為第三實施例之成像鏡頭3之相關參數值及其對應條件(1)至條件(7)之計算值,由表六可知,第三實施例之成像鏡頭3皆能滿足條件(1)至條件(7)之要求。
Table 6 shows the relevant parameter values of the
另外,第三實施例之成像鏡頭3的光學性能也可達到要求。由第10A圖可看出,第三實施例之成像鏡頭3於廣角端,其縱向像差介於-0.015mm至0.02mm之間。由第10B圖可看出,第三實施例之成像鏡頭3於廣角端其場曲介於-0.01mm至0.03mm之間。由第10C圖可看出,第三實施例之成像鏡頭3於廣角端其畸變介於0%至1%之間。由第11A圖可看出,第三實施例之成像鏡頭3於中間端,其縱向像差介於-0.015mm至0.02mm之間。由第11B圖可看出,第三實施例之成像鏡頭3於中間端其場曲介於-0.05mm至0.01mm之間。由第11C圖可看出,第三實施例之成像鏡頭3於中間端其畸變介於0%至2%之間。由第12A圖可看出,第三實施例之成像鏡頭3於望遠端,其縱向像差介於-0.03mm至0.01mm之間。由第12B圖可看出,第三實施例之成像鏡頭3於望遠端其場曲介於-0.03mm至-0.01mm之間。由第12C圖可看出,第三實施例之成像鏡頭3於望遠端其畸變介於0%至2%之間。顯見第三實施例之成像鏡頭3之縱向像差、場曲、畸變都能被有效修正,從而得到較佳的光學性能。
In addition, the optical performance of the
上述成像鏡頭除了用於監控攝影機外,也可以應用於汽車先進駕駛輔助系統,特別是在夜晚或下雨天視線不良的環境,仍可擷取到車外的清晰影像供駕駛人參考,以提高行車安全。此外,瞄準器一般由物鏡組、正立鏡組及目鏡組組成,上述成像鏡頭也可以直接當瞄準器使用,用以擷取遠方目標物的清晰影像,或者當成物鏡組再搭配其它的正立鏡組 及目鏡組組成瞄準器,亦應屬本發明之範疇。 In addition to being used in surveillance cameras, the above-mentioned imaging lenses can also be used in automobile advanced driving assistance systems. Especially in environments with poor visibility at night or on rainy days, clear images of the outside of the car can still be captured for driver reference to improve driving safety. . In addition, a sight is generally composed of an objective lens group, an upright lens group and an eyepiece group. The above-mentioned imaging lens can also be used directly as a sight to capture clear images of distant targets, or as an objective lens group in combination with other upright lenses. lens group and the eyepiece group forming a sight should also fall within the scope of the present invention.
雖然本發明已以實施方式揭露如上,然其並非用以限定本發明,任何熟悉此技藝者,在不脫離本發明的精神和範圍內,當可作各種的更動與潤飾,因此本發明的保護範圍當視後附的申請專利範圍所界定者為準。 Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone familiar with the art can make various modifications and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention is The scope shall be determined by the appended patent application scope.
1:成像鏡頭 1: Imaging lens
LG11:第一透鏡群 LG11: First lens group
LG12:第二透鏡群 LG12: Second lens group
LG13:第三透鏡群 LG13: Third lens group
LG14:第四透鏡群 LG14: Fourth lens group
OF1:濾光片 OF1: filter
CG1:保護玻璃 CG1: Protective glass
IMA1:成像面 IMA1: Imaging surface
OA1:光軸 OA1: optical axis
L11:1-1透鏡 L11:1-1 lens
L12:1-2透鏡 L12:1-2 lens
L13:2-1透鏡 L13:2-1 lens
L14:2-2透鏡 L14:2-2 lens
L15:3-1透鏡 L15:3-1 lens
L16:3-2透鏡 L16:3-2 lens
L17:3-3透鏡 L17:3-3 lens
L18:3-4透鏡 L18:3-4 lens
L19:4-1透鏡 L19:4-1 lens
L110:1-3透鏡 L110:1-3 lens
L111:2-3透鏡 L111:2-3 lens
ST1:光圈 ST1: Aperture
S11:1-3透鏡物側面 S11:1-3 lens object side
S12:1-3透鏡像側面 S12:1-3 lens image side
S13:1-1透鏡物側面 S13:1-1 lens object side
S14:1-1透鏡像側面 S14:1-1 lens image side
S15:1-2透鏡物側面 S15:1-2 lens object side
S16:1-2透鏡像側面 S16:1-2 lens image side
S17:2-1透鏡物側面 S17:2-1 lens object side
S18:2-1透鏡像側面 S18:2-1 lens image side
S19:2-2透鏡物側面 S19:2-2 lens object side
S110:2-2透鏡像側面 S110:2-2 lens image side
S111:2-3透鏡物側面 S111:2-3 lens object side
S112:2-3透鏡像側面 S112:2-3 lens image side
S113:光圈面 S113: Aperture surface
S114:3-1透鏡物側面 S114:3-1 lens object side
S115:3-1透鏡像側面 S115:3-1 lens image side
S116:3-2透鏡物側面 S116:3-2 lens object side
S117:3-2透鏡像側面 S117:3-2 lens image side
S118:3-3透鏡物側面 S118:3-3 lens object side
S119:3-3透鏡像側面 S119:3-3 lens image side
S120:3-4透鏡物側面 S120:3-4 lens object side
S121:3-4透鏡像側面 S121:3-4 lens image side
S122:4-1透鏡物側面 S122:4-1 lens object side
S123:4-1透鏡像側面 S123:4-1 lens image side
S124:濾光片物側面 S124: Filter object side
S125:濾光片像側面 S125: Filter image side
S126:保護玻璃物側面 S126: Protect the sides of glass objects
S127:保護玻璃像側面 S127: Protective glass side
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW111114668A TWI825679B (en) | 2022-04-18 | 2022-04-18 | Lens assembly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW111114668A TWI825679B (en) | 2022-04-18 | 2022-04-18 | Lens assembly |
Publications (2)
Publication Number | Publication Date |
---|---|
TW202343057A TW202343057A (en) | 2023-11-01 |
TWI825679B true TWI825679B (en) | 2023-12-11 |
Family
ID=89720586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW111114668A TWI825679B (en) | 2022-04-18 | 2022-04-18 | Lens assembly |
Country Status (1)
Country | Link |
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TW (1) | TWI825679B (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW200807016A (en) * | 2006-05-24 | 2008-02-01 | Casio Computer Co Ltd | Zoom lens and projection apparatus |
TW201608274A (en) * | 2014-08-22 | 2016-03-01 | 信泰光學(深圳)有限公司 | Zoom lens |
US20210364736A1 (en) * | 2017-12-28 | 2021-11-25 | Nittoh Inc. | Lens system and image pickup apparatus |
-
2022
- 2022-04-18 TW TW111114668A patent/TWI825679B/en active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW200807016A (en) * | 2006-05-24 | 2008-02-01 | Casio Computer Co Ltd | Zoom lens and projection apparatus |
TW201608274A (en) * | 2014-08-22 | 2016-03-01 | 信泰光學(深圳)有限公司 | Zoom lens |
US20210364736A1 (en) * | 2017-12-28 | 2021-11-25 | Nittoh Inc. | Lens system and image pickup apparatus |
Also Published As
Publication number | Publication date |
---|---|
TW202343057A (en) | 2023-11-01 |
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