Wide-angle lens

Abstract

A wide-angle lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens. The first lens is a meniscus lens and has negative refractive power. The second lens has refractive power and includes a convex surface facing the object side. The third lens has negative refractive power. The fourth lens has positive refractive power. The fifth lens element has refractive power and includes a concave surface facing the object side and a convex surface facing the image side. The sixth lens element has refractive power and includes a convex surface facing the object side. The seventh lens has positive refractive power. The eighth lens element has refractive power and includes a concave surface facing the image side. The ninth lens has positive refractive power. The tenth lens has positive refractive power and comprises a convex surface facing the object side.

Description

Technical Field

[0001] This invention relates to a wide-angle lens. Background Technology

[0002] The current trend in wide-angle lens development is not only towards a larger field of view, but also the need for high resolution to meet the diverse application requirements. Conventional wide-angle lenses can no longer meet current needs, and a new architecture is required to simultaneously satisfy the requirements of a large field of view and high resolution. Summary of the Invention

[0003] In view of this, the main objective of the present invention is to provide a wide-angle lens with a large field of view and high resolution, while still having good optical performance.

[0004] This invention provides a wide-angle lens comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens. The first lens is a meniscus lens with negative refractive power. The second lens has refractive power. The third lens has negative refractive power. The fourth lens has positive refractive power. The fifth lens has refractive power and includes a concave surface facing the object side and a convex surface facing the image side. The sixth lens has refractive power and includes a convex surface facing the object side. The seventh lens has positive refractive power. The eighth lens has refractive power and includes a concave surface facing the image side. The ninth lens has positive refractive power. The tenth lens has positive refractive power and includes a convex surface facing the object side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, and the tenth lens are arranged sequentially along the optical axis from the object side to the image side.

[0005] The fifth lens has positive refractive power and includes a fifth front lens and a fifth rear lens, with no air gap between the fifth front lens and the fifth rear lens. The fifth front lens is a biconcave lens with negative refractive power, and the fifth rear lens is a biconvex lens with positive refractive power. The fifth front lens and the fifth rear lens are arranged sequentially from the object side to the image side along the optical axis. The sixth lens includes a sixth front lens and a sixth rear lens, with no air gap between the sixth front lens and the sixth rear lens. The sixth front lens is a biconvex lens with positive refractive power, and the sixth rear lens has negative refractive power and includes a concave surface facing the object side. The sixth front lens and the sixth rear lens are arranged sequentially from the object side to the image side along the optical axis.

[0006] The first lens includes a convex surface facing the object side and a concave surface facing the image side; the second lens is a meniscus lens with negative refractive power, including a convex surface facing the object side and a concave surface facing the image side; the third lens is a biconcave lens, including a concave surface facing the object side and another concave surface facing the image side; the fourth lens is a biconvex lens, including a convex surface facing the object side and another convex surface facing the image side; the seventh lens is a biconvex lens, including a convex surface facing the object side and another convex surface facing the image side; the eighth lens has negative refractive power; and the ninth lens includes a convex surface facing the object side.

[0007] This invention provides another wide-angle lens comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens. The first lens is a meniscus lens with negative refractive power. The second lens has refractive power and includes a convex surface facing the object side. The third lens has negative refractive power. The fourth lens has positive refractive power. The fifth lens has refractive power and includes a concave surface facing the object side and a convex surface facing the image side. The sixth lens has refractive power and includes a convex surface facing the object side. The seventh lens has positive refractive power. The eighth lens has negative refractive power. The ninth lens has refractive power and includes a convex surface facing the object side. The tenth lens has positive refractive power and includes a convex surface facing the object side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, and the tenth lens are arranged sequentially along the optical axis from the object side to the image side.

[0008] The fifth lens has positive refractive power and includes a fifth front lens and a fifth rear lens. There is no air gap between the fifth front lens and the fifth rear lens. The fifth front lens is a biconcave lens with negative refractive power, and the fifth rear lens is a biconvex lens with positive refractive power. The fifth front lens and the fifth rear lens are arranged sequentially from the object side to the image side along the optical axis. The sixth lens includes a sixth front lens and a sixth rear lens. There is no air gap between the sixth front lens and the sixth rear lens. The sixth front lens is a biconvex lens with positive refractive power, and the sixth rear lens has negative refractive power and includes a concave surface facing the object side. The sixth front lens and the sixth rear lens are arranged sequentially from the object side to the image side along the optical axis.

[0009] The first lens includes a convex surface facing the object side and a concave surface facing the image side; the second lens is a meniscus lens with negative refractive power and may further include a concave surface facing the image side; the third lens is a biconcave lens and includes a concave surface facing the object side and another concave surface facing the image side; the fourth lens is a biconvex lens and includes a convex surface facing the object side and another convex surface facing the image side; the seventh lens is a biconvex lens and includes a convex surface facing the object side and another convex surface facing the image side; the eighth lens includes a concave surface facing the image side; and the ninth lens has positive refractive power.

[0010] The wide-angle lens satisfies at least one of the following conditions: 6≤TTL / BFL≤9; 6≤TTL / IH≤10; 6.5≤TTL / f≤10.5; -7≤f1 / f≤-3; 6≤f9 / f≤15; Vd10≤21; 9≤(Vd1+Vd2+Vd3) / Vd4≤11; where TTL is the distance between the object-side surface of the first lens and the imaging surface on the optical axis, BFL is the distance between the image-side surface of the tenth lens and the imaging surface on the optical axis, IH is the image height of the wide-angle lens, f is the effective focal length of the wide-angle lens, f1 is the effective focal length of the first lens, f9 is the effective focal length of the ninth lens, Vd1 is the Abbe coefficient of the first lens, Vd2 is the Abbe coefficient of the second lens, Vd3 is the Abbe coefficient of the third lens, Vd4 is the Abbe coefficient of the fourth lens, and Vd10 is the Abbe coefficient of the tenth lens.

[0011] The sixth rear lens is a meniscus lens and may further include a convex surface facing the image side; the eighth lens is a biconcave lens and may further include another concave surface facing the object side; the ninth lens is a biconvex lens and may further include another convex surface facing the image side; and the tenth lens is a biconvex lens and may further include another convex surface facing the image side.

[0012] The sixth rear lens is a biconcave lens, and may further include another concave surface facing the image side; the eighth lens is a meniscus lens, and may further include a convex surface facing the object side; the ninth lens is a meniscus lens, and may further include a concave surface facing the image side; and the tenth lens is a biconvex lens, and may further include another convex surface facing the image side.

[0013] The sixth rear lens is a biconcave lens and may further include another concave surface facing the image side; the eighth lens is a meniscus lens and may further include a convex surface facing the object side; the ninth lens is a meniscus lens and may further include a concave surface facing the image side; and the tenth lens is a meniscus lens and may further include a concave surface facing the image side.

[0014] The wide-angle lens of this invention has a large field of view and high resolution, but still has good optical performance. Attached Figure Description

[0015] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the lens configuration and optical path according to the first embodiment of the wide-angle lens of the present invention.

[0017] Figure 2 This is a schematic diagram of the lens configuration and optical path of a fourth embodiment of the wide-angle lens according to the present invention.

[0018] Figure 3 This is a field curvature diagram of the fourth embodiment of the wide-angle lens according to the present invention.

[0019] Figure 4 This is a distortion diagram of the fourth embodiment of the wide-angle lens according to the present invention.

[0020] Figure 5 This is a spot diagram of the fourth embodiment of the wide-angle lens according to the present invention.

[0021] Figure 6 This is a schematic diagram of the lens configuration and optical path of a fifth embodiment of the wide-angle lens according to the present invention.

[0022] Figure 7 This is a field curvature diagram of the fifth embodiment of the wide-angle lens according to the present invention.

[0023] Figure 8 This is a distortion diagram of the fifth embodiment of the wide-angle lens according to the present invention.

[0024] Figure 9 This is a light spot diagram of the fifth embodiment of the wide-angle lens according to the present invention.

[0025] Figure 10 This is a schematic diagram of the lens configuration and optical path of a sixth embodiment of a wide-angle lens according to the present invention.

[0026] Figure 11 This is a field curvature diagram of the sixth embodiment of the wide-angle lens according to the present invention.

[0027] Figure 12 This is a distortion diagram of the sixth embodiment of the wide-angle lens according to the present invention.

[0028] Figure 13 This is a light spot diagram of the sixth embodiment of the wide-angle lens according to the present invention. Detailed Implementation

[0029] This invention provides a wide-angle lens, comprising: a first lens having negative refractive power, the first lens being a meniscus lens; a second lens having refractive power; a third lens having negative refractive power; a fourth lens having positive refractive power; a fifth lens having refractive power, the fifth lens including a concave surface facing the object side and a convex surface facing the image side; a sixth lens having refractive power, the sixth lens including a convex surface facing the object side; a seventh lens having positive refractive power; an eighth lens having refractive power, the eighth lens including a concave surface facing the image side; a ninth lens having positive refractive power; and a tenth lens having positive refractive power, the tenth lens including a convex surface facing the object side; wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, and the tenth lens are arranged sequentially along the optical axis from the object side to the image side. Based on the above design, basic operation can be achieved without additional conditions.

[0030] This invention provides another wide-angle lens, comprising: a first lens having negative refractive power, the first lens being a meniscus lens; a second lens having refractive power, the second lens including a convex surface facing the object side; a third lens having negative refractive power; a fourth lens having positive refractive power; a fifth lens having refractive power, the fifth lens including a concave surface facing the object side and a convex surface facing the image side; a sixth lens having refractive power, the sixth lens including a convex surface facing the object side; a seventh lens having positive refractive power; an eighth lens having negative refractive power; a ninth lens having refractive power, the ninth lens including a convex surface facing the object side; and a tenth lens having positive refractive power, the tenth lens including a convex surface facing the object side; wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, and the tenth lens are arranged sequentially along the optical axis from the object side to the image side. Based on the above design, basic operation can be achieved without additional conditions.

[0031] Please refer to Tables 1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, and 17 below. Tables 1, 4, 7, 10, 13, and 16 are the relevant parameter tables for each lens in the first to sixth embodiments of the wide-angle lens according to the present invention. Tables 2, 5, 8, 11, 14, and 17 are the relevant parameter tables for the aspherical surfaces of the aspherical lenses in Tables 1, 4, 7, 10, 13, and 16.

[0032] Figure 1 , 2Figures 6, 7, and 10 are schematic diagrams of lens configuration and optical path for the first, fourth, fifth, and sixth embodiments of the wide-angle lens of the present invention, respectively. The schematic diagrams of lens configuration and optical path for the second and third embodiments of the wide-angle lens are omitted, but the component symbols of the second and third embodiments will continue to be used for ease of explanation in the following content concerning the second and third embodiments. The first lenses L11, L21, L31, L41, L51, and L61 are meniscus lenses with negative refractive power. Their object-side surfaces S11, S21, S31, S41, S51, and S61 are convex, and their image-side surfaces S12, S22, S32, S42, S52, and S62 are concave. Both the object-side surfaces S11, S21, S31, S41, S51, and S61 and the image-side surfaces S12, S22, S32, S42, S52, and S62 are spherical surfaces.

[0033] The second lenses L12, L22, L32, L42, L52, and L62 are meniscus lenses with negative refractive power. Their object-side surfaces S13, S23, S33, S43, S53, and S63 are convex, while their image-side surfaces S14, S24, S34, S44, S54, and S64 are concave. Both the object-side surfaces S13, S23, S33, S43, S53, and S63 and the image-side surfaces S14, S24, S34, S44, S54, and S64 are spherical surfaces.

[0034] The third lenses L13, L23, L33, L43, L53, and L63 are biconcave lenses with negative refractive power. Their object-side surfaces S15, S25, S35, S45, S55, and S65 are concave, and their image-side surfaces S16, S26, S36, S46, S56, and S66 are concave. Both the object-side surfaces S15, S25, S35, S45, S55, and S65 and the image-side surfaces S16, S26, S36, S46, S56, and S66 are spherical surfaces.

[0035] The fourth lenses L14, L24, L34, L44, L54, and L64 are biconvex lenses with positive refractive power. Their object-side surfaces S17, S27, S37, S47, S57, and S67 are convex surfaces, and their image-side surfaces S18, S28, S38, S48, S58, and S68 are convex surfaces. The object-side surfaces S17, S27, S37, S47, S57, and S67, as well as the image-side surfaces S18, S28, S38, S48, S58, and S68, are all spherical surfaces.

[0036] The fifth lenses L15, L25, L35, L45, L55, and L65 have positive refractive power. Their object-side surfaces S19, S29, S39, S49, S59, and S69 are concave, while their image-side surfaces S111, S211, S311, S411, S511, and S611 are convex. Both the object-side surfaces S19, S29, S39, S49, S59, and S69 and the image-side surfaces S111, S211, S311, S411, S511, and S611 are spherical surfaces. The fifth lenses L15, L25, L35, L45, L55, and L65 include the fifth front lenses L15F, L25F, L35F, L45F, L55F, and L65F, and the fifth rear lenses L15R, L25R, L35R, L45R, L55R, and L65R, with no air gap or cementing between them. The fifth front lenses L15F, L25F, L35F, L45F, L55F, and L65F are biconcave lenses with negative refractive power. Their object-side surfaces S19, S29, S39, S49, S59, and S69 are concave, and their image-side surfaces S110, S210, S310, S410, S510, and S610 are concave. The object-side surfaces S19, S29, and S39 are also concave. S49, S59, S69 and the image-side surfaces S110, S210, S310, S410, S510, S610 are all spherical surfaces. The fifth rear lens L15R, L25R, L35R, L45R, L55R, L65R are biconvex lenses with positive refractive power. Their object-side surfaces S110, S210, S310, S410, S510, S610 are convex surfaces, and their image-side surfaces S111, S211, S311, S411, S511, S611 are convex surfaces. The object-side surfaces S110, S210, S310, S410, S510, S610 and their image-side surfaces S111, S211, S311, S411, S511, S611 are all spherical surfaces.

[0037] The sixth lenses L16, L26, L36, L46, L56, and L66 have negative refractive power. Their object-side surfaces S113, S213, S313, S413, S513, and S613 are convex surfaces, while their image-side surfaces S115, S215, S315, S415, S515, and S615 are all spherical surfaces. The sixth lenses L16, L26, L36, L46, L56, and L66 include the sixth front lenses L16F, L26F, L36F, L46F, L56F, and L66F, and the sixth rear lenses L16R, L26R, L36R, L46R, L56R, and L66R, with no air gap or cementation between them. The sixth front lenses L16F, L26F, L36F, L46F, L56F, and L66F are biconvex lenses with positive refractive power. Their object-side surfaces S113, S213, S313, S413, S513, and S613 are convex, and their image-side surfaces S114, S214, S314, S414, S514, and S61 are convex. 4 is a convex surface. The object-side surfaces S113, S213, S313, S413, S513, and S613, and the image-side surfaces S114, S214, S314, S414, S514, and S614 are all spherical surfaces. The sixth rear lens L16R, L26R, L36R, L46R, L56R, and L66R have negative refractive power. Their object-side surfaces S114, S214, S314, S414, S514, and S614 are concave surfaces. The object-side surfaces S114, S214, S314, S414, S514, and S614, and the image-side surfaces S115, S215, S315, S415, S515, and S615 are all spherical surfaces.

[0038] The seventh lenses L17, L27, L37, L47, L57, and L67 are biconvex lenses with positive refractive power. Their object-side surfaces S116, S216, S316, S416, S516, and S616 are convex surfaces, and their image-side surfaces S117, S217, S317, S417, S517, and S617 are convex surfaces. Both the object-side surfaces S116, S216, S316, S416, S516, and S616 and the image-side surfaces S117, S217, S317, S417, S517, and S617 are aspherical surfaces.

[0039] The eighth lenses L18, L28, L38, L48, L58, and L68 have negative refractive power. Their image-side surfaces S119, S219, S319, S419, S519, and S619 are concave, while their object-side surfaces S118, S218, S318, S418, S518, and S618, as well as their image-side surfaces S119, S219, S319, S419, S519, and S619, are all spherical surfaces.

[0040] The ninth lenses L19, L29, L39, L49, L59, and L69 have positive refractive power. Their object-side surfaces S120, S220, S320, S420, S520, and S620 are convex surfaces, while their image-side surfaces S121, S221, S321, S421, S521, and S621 are all spherical surfaces.

[0041] The tenth lenses L110, L210, L310, L410, L510, and L610 have positive refractive power. Their object-side surfaces S122, S222, S322, S422, S522, and S622 are convex surfaces, while their image-side surfaces S123, S223, S323, S423, S523, and S623 are all spherical surfaces.

[0042] In addition, wide-angle lenses 1, 2, 3, 4, 5, and 6 satisfy at least one of the following conditions:

[0043] 6 ≤ TTL / BFL ≤ 9; (1)

[0044] 6 ≤ TTL / IH ≤ 10; (2)

[0045] 6.5 ≤ TTL / f ≤ 10.5; (3)

[0046] -7 ≤ f1 / f ≤ -3; (4)

[0047] 6 ≤ f9 / f ≤ 15; (5)

[0048] Vd10 ≤ 21; (6)

[0049] 9 ≤ (Vd1+Vd2+Vd3) / Vd4 ≤ 11; (7)

[0050] Wherein, TTL refers to the distance between the object-side surfaces S11, S21, S31, S41, S51, and S61 of the first lenses L11, L21, L31, L41, L51, and L61 and the imaging surfaces IMA1, IMA2, IMA3, IMA4, IMA5, and IMA6 on the optical axes OA1, OA2, OA3, OA4, OA5, and OA6, respectively, in the first to sixth embodiments; and BFL refers to the distance between the tenth lenses L110, L210, L310, and L41 in the first to sixth embodiments. 10. The distances from the image sides S123, S223, S323, S423, S523, and S623 of L510 and L610 to the imaging planes IMA1, IMA2, IMA3, IMA4, IMA5, and IMA6 on the optical axes OA1, OA2, OA3, OA4, OA5, and OA6, respectively; IH is the image height of wide-angle lenses 1, 2, 3, 4, 5, and 6 in the first to sixth embodiments; f is the effective height of wide-angle lenses 1, 2, 3, 4, 5, and 6 in the first to sixth embodiments. Focal length, f1 is the effective focal length of the first lenses L11, L21, L31, L41, L51, and L61 in the first to sixth embodiments; f9 is the effective focal length of the ninth lenses L19, L29, L39, L49, L59, and L69 in the first to sixth embodiments; Vd1 is the Abbe coefficient of the first lenses L11, L21, L31, L41, L51, and L61 in the first to sixth embodiments; Vd2 is the focal length of the second lenses L12 and L22 in the first to sixth embodiments. The Abbe coefficients of lenses L13, L23, L33, L43, L53, and L63 are given by Vd3 in the first to sixth embodiments. The Abbe coefficients of lenses L14, L24, L34, L44, L54, and L64 are given by Vd4 in the first to sixth embodiments. The Abbe coefficients of lenses L110, L210, L310, L410, L510, and L610 are given by Vd10 in the first to sixth embodiments. This allows wide-angle lenses 1, 2, 3, 4, 5, and 6 to effectively improve the field of view, effectively improve resolution, effectively correct aberrations, and effectively correct chromatic aberration.

[0051] When only condition (1): 6≤TTL / BFL≤9 is met, the assembly yield can be effectively improved and basic operation can be achieved; when only condition (2): 6≤TTL / IH≤10 is met, the total length of the lens can be effectively shortened to achieve the purpose of miniaturization design and basic operation can be achieved; when only condition (3): 6.5≤TTL / f≤10.5 is met, the back focal length of the lens can be effectively and reasonably shortened to achieve the purpose of better miniaturization design and basic operation can be achieved; when only condition (4): -7≤f1 / f≤-3 is met, the aberrations caused by large-angle light collection can be effectively reduced. When only condition (5) is met: 6≤f9 / f≤15, field curvature can be effectively reduced and basic operation can be achieved; when only condition (6) is met: Vd10≤21, the optical path can be effectively deflected to match the principal ray angle of the imaging plane, and the lens volume can be effectively reduced and basic operation can be achieved; when only condition (7) is met: 9≤(Vd1+Vd2+Vd3) / Vd4≤11, the optical path from the first lens to the fourth lens can be effectively adjusted to balance the deflection of different wavelengths of light, thereby reducing chromatic aberration and basic operation can be achieved.

[0052] When the first lens is a meniscus lens with negative refractive power, it can effectively improve the field of view and effectively adjust the optical path, making the optical path less prone to large aberrations. When the second lens is a meniscus lens with negative refractive power, it can effectively reduce the optical path adjustment caused by the negative refractive power of the first lens, thus correcting some aberrations. When the third lens has negative refractive power, it can effectively correct the aberrations caused by the negative refractive powers of the first and second lenses. When the fourth lens has positive refractive power, it can adjust the optical path deflection caused by the negative refractive powers of the first to third lenses. When the fifth lens is a cemented lens, it can effectively correct chromatic aberration; when the sixth lens is a cemented lens, it can further correct chromatic aberration; when the seventh lens is an aspherical lens with positive refractive power, it can effectively improve the resolution of the peripheral field of view; when the eighth lens has negative refractive power, it can effectively reduce astigmatism, and the meniscus design helps to reduce manufacturing sensitivity and has good processing characteristics; when the ninth lens has positive refractive power, it can effectively reduce field curvature; when the tenth lens has positive refractive power, it can effectively adjust the optical path to reduce the principal ray angle, so as to meet the principal ray angle requirements of the imaging plane.

[0053] The first embodiment of the wide-angle lens of the present invention will now be described in detail. Please refer to... Figure 1The wide-angle lens 1, along the optical axis OA1 from the object side to the image side, includes, in sequence, a first lens L11, a second lens L12, a third lens L13, a fourth lens L14, a fifth lens L15, an aperture ST1, a sixth lens L16, a seventh lens L17, an eighth lens L18, a ninth lens L19, a tenth lens L110, a filter OF1, and a protective glass CG1. The fifth lens L15 is formed by cementing the fifth front lens L15F and the fifth rear lens L15R. The sixth lens L16 is formed by cementing the sixth front lens L16F and the sixth rear lens L16R. During imaging, light rays from the object side are finally imaged onto the imaging plane IMA1. According to paragraphs 1 to 13 of the [Implementation Method], wherein: the sixth rear lens L16R is a meniscus lens with its image-side surface S115 being convex; the eighth lens L18 is a biconcave lens with its object-side surface S118 being concave; the ninth lens L19 is a biconvex lens with its image-side surface S121 being convex; the tenth lens L110 is a biconvex lens with its image-side surface S123 being convex; the filter OF1 has its object-side surface S124 and image-side surface S125 both being flat; the protective glass CG1 has its object-side surface S126 and image-side surface S127 both being flat; by utilizing the above-mentioned lens, aperture ST1, and design that satisfies at least one of conditions (1) to (7), the wide-angle lens 1 can effectively improve the field of view, effectively improve the resolution, effectively correct aberrations, and effectively correct chromatic aberration. Table 1 is as follows: Figure 1 Table of relevant parameters for each lens in medium wide-angle lens 1.

[0054] Table 1

[0055]

[0056]

[0057] The aspherical surface concavity z of the aspherical lens in Table 1 is obtained by the following formula: z = ch 2 / {1+[1-(k+1)c 2 h 2 ] 1 / 2}+Ah 4 +Bh 6 +Ch 8 +Dh 10 Where: c: curvature; h: perpendicular distance from any point on the lens surface to the optical axis; k: conic coefficient; A~D: aspherical coefficients.

[0058] Table 2 is a table of relevant parameters for the aspherical surface of the aspherical lens in Table 1, where k is the conic constant and A to D are the aspherical coefficients.

[0059] Table 2

[0060] Surface serial number k A B C D S116 -7.83308 0.000221 -1.7E-06 4.77E-08 -1.6E-09 S117 -1.34462 0.000131 -6.3E-07 7.5E-08 -2.5E-09

[0061] Table 3 shows the relevant parameter values ​​of the wide-angle lens 1 in the first embodiment and the calculated values ​​of the corresponding conditions (1) to (7). As can be seen from Table 3, the wide-angle lens 1 in the first embodiment can meet the requirements of conditions (1) to (7).

[0062] Table 3

[0063]

[0064] The second embodiment of the wide-angle lens of the present invention will now be described in detail. The wide-angle lens 2, along the optical axis OA2 from the object side to the image side, sequentially includes a first lens L21, a second lens L22, a third lens L23, a fourth lens L24, a fifth lens L25, an aperture ST2, a sixth lens L26, a seventh lens L27, an eighth lens L28, a ninth lens L29, a tenth lens L210, a filter OF2, and a protective glass CG2. The fifth lens L25 is formed by cementing a fifth front lens L25F and a fifth rear lens L25R. The sixth lens L26 is formed by cementing a sixth front lens L26F and a sixth rear lens L26R. During imaging, light rays from the object side are finally imaged onto the imaging plane IMA2. According to paragraphs 1 to 13 of the [Implementation Method], the sixth rear lens L26R is a meniscus lens with a convex image-side surface S215; the eighth lens L28 is a biconcave lens with a concave object-side surface S218; the ninth lens L29 is a biconvex lens with a convex image-side surface S221; the tenth lens L210 is a biconvex lens with a convex image-side surface S223; the filter OF2 has both a flat object-side surface S224 and an image-side surface S225; the protective glass CG2 has both a flat object-side surface S226 and an image-side surface S227; by utilizing the above-mentioned lenses, aperture ST2, and the design that satisfies at least one of conditions (1) to (7), the wide-angle lens 2 can effectively improve the field of view, effectively improve the resolution, effectively correct aberrations, and effectively correct chromatic aberration. Table 4 shows the relevant parameters of each lens in the wide-angle lens 2.

[0065] Table 4

[0066]

[0067]

[0068] The definition of the aspherical surface concavity z of each lens in Table 4 is the same as the definition of the aspherical surface concavity z of each lens in Table 1 of the first embodiment, and will not be repeated here. Table 5 is a table of relevant parameters of the aspherical surface of the aspherical lens in Table 4, where k is the conic constant and A to D are the aspherical coefficients.

[0069] Table 5

[0070] Surface serial number k A B C D S216 -8.38873 0.000224 -1.8E-06 2.12E-08 2.26E-10 S217 -0.98687 0.000106 8.73E-07 -1.1E-08 5.02E-10

[0071] Table 6 shows the relevant parameter values ​​of the wide-angle lens 2 in the second embodiment and the calculated values ​​of the corresponding conditions (1) to (7). As can be seen from Table 6, the wide-angle lens 2 in the second embodiment can meet the requirements of conditions (1) to (7).

[0072] Table 6

[0073]

[0074] The third embodiment of the wide-angle lens of the present invention will now be described in detail. The wide-angle lens 3, along the optical axis OA3 from the object side to the image side, sequentially includes a first lens L31, a second lens L32, a third lens L33, a fourth lens L34, a fifth lens L35, an aperture ST3, a sixth lens L36, a seventh lens L37, an eighth lens L38, a ninth lens L39, a tenth lens L310, a filter OF3, and a protective glass CG3. The fifth lens L35 is formed by cementing a fifth front lens L35F and a fifth rear lens L35R. The sixth lens L36 is formed by cementing a sixth front lens L36F and a sixth rear lens L36R. During imaging, light rays from the object side are finally imaged onto the imaging plane IMA3. According to paragraphs 1 to 13 of the [Implementation Method], the sixth rear lens L36R is a biconcave lens with its image-side surface S315 being concave; the eighth lens L38 is a meniscus lens with its object-side surface S318 being convex; the ninth lens L39 is a meniscus lens with its image-side surface S321 being concave; the tenth lens L310 is a biconvex lens with its image-side surface S323 being convex; the filter OF3 has its object-side surface S324 and image-side surface S325 both being planar; the protective glass CG3 has its object-side surface S326 and image-side surface S327 both being planar; by utilizing the above-mentioned lenses, aperture ST3, and the design that satisfies at least one of conditions (1) to (7), the wide-angle lens 3 can effectively improve the field of view, effectively improve the resolution, effectively correct aberrations, and effectively correct chromatic aberration. Table 7 is a table of relevant parameters for each lens of the wide-angle lens 3.

[0075] Table 7

[0076]

[0077]

[0078] The definition of the aspherical surface concavity z of each lens in Table 7 is the same as the definition of the aspherical surface concavity z of each lens in Table 1 of the first embodiment, and will not be repeated here. Table 8 is a table of relevant parameters of the aspherical surface of the aspherical lens in Table 7, where k is the conic constant and A to D are the aspherical coefficients.

[0079] Table 8

[0080] Surface serial number k A B C D S316 -9.85752 0.00022 -2.5E-06 4.08E-08 -1.7E-10 S317 -0.71851 6.76E-05 6.86E-07 3.68E-09 1.26E-10

[0081] Table 9 shows the relevant parameter values ​​of the wide-angle lens 3 in the third embodiment and the calculated values ​​of the corresponding conditions (1) to (7). As can be seen from Table 9, the wide-angle lens 3 in the third embodiment can meet the requirements of conditions (1) to (7).

[0082] Table 9

[0083]

[0084] The fourth embodiment of the wide-angle lens of the present invention will now be described in detail. Please refer to [link / reference]. Figure 2 The wide-angle lens 4, along the optical axis OA4 from the object side to the image side, sequentially includes a first lens L41, a second lens L42, a third lens L43, a fourth lens L44, a fifth lens L45, an aperture ST4, a sixth lens L46, a seventh lens L47, an eighth lens L48, a ninth lens L49, a tenth lens L410, a filter OF4, and a protective glass CG4. The fifth lens L45 is formed by cementing the fifth front lens L45F and the fifth rear lens L45R. The sixth lens L46 is formed by cementing the sixth front lens L46F and the sixth rear lens L46R. During imaging, light rays from the object side are finally imaged onto the imaging plane IMA4. According to paragraphs 1 to 13 of the [Implementation Method], wherein: the sixth rear lens L46R is a biconcave lens with its image-side surface S415 being concave; the eighth lens L48 is a meniscus lens with its object-side surface S418 being convex; the ninth lens L49 is a meniscus lens with its image-side surface S421 being concave; the tenth lens L410 is a meniscus lens with its image-side surface S423 being concave; the filter OF4 has its object-side surface S424 and image-side surface S425 both being planar; the protective glass CG4 has its object-side surface S426 and image-side surface S427 both being planar; by utilizing the above-mentioned lenses, aperture ST4, and the design that satisfies at least one of conditions (1) to (7), the wide-angle lens 4 can effectively improve the field of view, effectively improve the resolution, effectively correct aberrations, and effectively correct chromatic aberration. Table 10 is... Figure 2 Table of relevant parameters for each lens in the medium wide-angle lens 4.

[0085] Table 10

[0086]

[0087] The definition of the aspherical surface concavity z of each lens in Table 10 is the same as the definition of the aspherical surface concavity z of each lens in Table 1 of the first embodiment, and will not be repeated here. Table 11 is a table of relevant parameters of the aspherical surface of the aspherical lens in Table 10, where k is the conic constant and A to D are the aspherical coefficients.

[0088] Table 11

[0089] Surface serial number k A B C D S416 -9.85752 0.00022 -2.5E-06 4.08E-08 -1.7E-10 S417 -0.71851 6.76E-05 6.86E-07 3.68E-09 1.26E-10

[0090] Table 12 shows the relevant parameter values ​​of the wide-angle lens 4 in the fourth embodiment and the calculated values ​​of the corresponding conditions (1) to (7). As can be seen from Table 12, the wide-angle lens 4 in the fourth embodiment can meet the requirements of conditions (1) to (7).

[0091] Table 12

[0092]

[0093] Furthermore, the optical performance of the wide-angle lens 4 in the fourth embodiment also meets the requirements, by Figure 3 It can be seen that the field curvature of the wide-angle lens 4 in the fourth embodiment is between -0.01mm and 0.01mm. Figure 4 It can be seen that the distortion of the wide-angle lens 4 in the fourth embodiment is between -8% and 0%. Figure 5 As can be seen, in the wide-angle lens 4 of the fourth embodiment, when the image height is 0.000mm, the root mean square radius of the light spot is 1.046μm and the geometrical radius of the light spot is 2.390μm; when the image height is 1,866mm, the root mean square radius of the light spot is 1.051μm and the geometrical radius of the light spot is 2.549μm; when the image height is 3.731mm, the root mean square radius of the light spot is 1.182μm and the geometrical radius of the light spot is 4.361μm; when the image height is 5.596mm, the root mean square radius of the light spot is 1.328μm and the geometrical radius of the light spot is 4.262μm; and when the image height is 7.462mm, the root mean square radius of the light spot is 1.686μm and the geometrical radius of the light spot is 6.210μm. It is evident that the field curvature and distortion of the wide-angle lens 4 in the fourth embodiment can be effectively corrected, thereby achieving better optical performance.

[0094] The fifth embodiment of the wide-angle lens of the present invention will now be described in detail. Please refer to [link / reference]. Figure 6The wide-angle lens 5, along the optical axis OA5 from the object side to the image side, includes, in sequence, a first lens L51, a second lens L52, a third lens L53, a fourth lens L54, a fifth lens L55, an aperture ST5, a sixth lens L56, a seventh lens L57, an eighth lens L58, a ninth lens L59, a tenth lens L510, a filter OF5, and a protective glass CG5. The fifth lens L55 is formed by cementing the fifth front lens L55F and the fifth rear lens L55R together. The sixth lens L56 is formed by cementing the sixth front lens L56F and the sixth rear lens L56R together. During imaging, light rays from the object side are finally imaged onto the imaging plane IMA5. According to paragraphs 1 to 13 of the [Implementation Method], wherein: the sixth rear lens L56R is a biconcave lens with its image-side surface S515 being concave; the eighth lens L58 is a meniscus lens with its object-side surface S518 being convex; the ninth lens L59 is a meniscus lens with its image-side surface S521 being concave; the tenth lens L510 is a biconvex lens with its image-side surface S523 being convex; the filter OF5 has its object-side surface S524 and image-side surface S525 both being planar; the protective glass CG5 has its object-side surface S526 and image-side surface S527 both being planar; by utilizing the above-mentioned lenses, aperture ST5, and the design that satisfies at least one of conditions (1) to (7), the wide-angle lens 5 can effectively improve the field of view, effectively improve the resolution, effectively correct aberrations, and effectively correct chromatic aberration. Table 13 is Figure 6 A table showing the relevant parameters of each lens in the medium wide-angle lens 5.

[0095] Table Thirteen

[0096]

[0097]

[0098] The definition of the aspherical surface concavity z of each lens in Table 13 is the same as the definition of the aspherical surface concavity z of each lens in Table 1 of the first embodiment, and will not be repeated here. Table 14 is a table of relevant parameters of the aspherical surface of the aspherical lens in Table 13, where k is the conic constant and A to D are the aspherical coefficients.

[0099] Table 14

[0100] Surface serial number k A B C D S516 -12.0038 5.41E-05 -3.2E-07 2.88E-10 -9.5E-12 S517 -0.03648 2.8E-06 1.13E-07 3.89E-09 -6.9E-11

[0101] Table 15 shows the relevant parameter values ​​of the wide-angle lens 5 in the fifth embodiment and the calculated values ​​of the corresponding conditions (1) to (7). As can be seen from Table 15, the wide-angle lens 5 in the fifth embodiment can meet the requirements of conditions (1) to (7).

[0102] Table 15

[0103]

[0104] Furthermore, the optical performance of the wide-angle lens 5 in the fifth embodiment also meets the requirements, by Figure 7 It can be seen that the field curvature of the wide-angle lens 5 in the fifth embodiment is between -0.01mm and 0.01mm. Figure 8 It can be seen that the distortion of the wide-angle lens 5 in the fifth embodiment is between -8% and 0%. Figure 9 As can be seen, the wide-angle lens 5 of the fifth embodiment has the following characteristics: when the image height is 0.000mm, its root mean square radius of the light spot is 0.257μm and its geometric radius is 0.570μm; when the image height is 1,865mm, its root mean square radius of the light spot is 0.475μm and its geometric radius is 1.397μm; when the image height is 3.731mm, its root mean square radius of the light spot is 0.787μm and its geometric radius is 3.143μm; when the image height is 5.596mm, its root mean square radius of the light spot is 1.167μm and its geometric radius is 4.110μm; and when the image height is 7.462mm, its root mean square radius of the light spot is 1.854μm and its geometric radius is 6.788μm. Clearly, the field curvature and distortion of the wide-angle lens 5 of the fifth embodiment can be effectively corrected, thus achieving better optical performance.

[0105] The sixth embodiment of the wide-angle lens of the present invention will now be described in detail. Please refer to [link / reference]. Figure 10 The wide-angle lens 6, along the optical axis OA6 from the object side to the image side, sequentially includes a first lens L61, a second lens L62, a third lens L63, a fourth lens L64, a fifth lens L65, an aperture ST6, a sixth lens L66, a seventh lens L67, an eighth lens L68, a ninth lens L69, a tenth lens L610, a filter OF6, and a protective glass CG6. The fifth lens L65 is formed by cementing the fifth front lens L65F and the fifth rear lens L65R. The sixth lens L66 is formed by cementing the sixth front lens L66F and the sixth rear lens L66R. During imaging, light rays from the object side are finally imaged onto the imaging plane IMA6. According to paragraphs 1 to 13 of the [Implementation Method], wherein: the sixth rear lens L66R is a biconcave lens with its image-side surface S615 being concave; the eighth lens L68 is a meniscus lens with its object-side surface S618 being convex; the ninth lens L69 is a meniscus lens with its image-side surface S621 being concave; the tenth lens L610 is a meniscus lens with its image-side surface S623 being concave; the filter OF6 has its object-side surface S624 and image-side surface S625 both being planar; the protective glass CG6 has its object-side surface S626 and image-side surface S627 both being planar; by utilizing the above-mentioned lenses, aperture ST6, and the design that satisfies at least one of conditions (1) to (7), the wide-angle lens 6 can effectively improve the field of view, effectively improve the resolution, effectively correct aberrations, and effectively correct chromatic aberration. Table 16 is... Figure 10A table showing the relevant parameters of each lens in the medium wide-angle lens 6.

[0106] Table 16

[0107]

[0108]

[0109] The definition of the aspherical surface concavity z of each lens in Table 16 is the same as the definition of the aspherical surface concavity z of each lens in Table 1 of the first embodiment, and will not be repeated here. Table 17 is a table of relevant parameters of the aspherical surface of the aspherical lens in Table 16, where k is the conic constant and A to D are the aspherical coefficients.

[0110] Table 17

[0111] Surface serial number k A B C D S616 -10.7981 0.00016 -2.5E-06 2.78E-08 -1.7E-10 S617 0.527762 2.7E-05 3.31E-07 -2.8E-09 -1.2E-13

[0112] Table 18 shows the relevant parameter values ​​of the wide-angle lens 6 in the sixth embodiment and the calculated values ​​of the corresponding conditions (1) to (7). As can be seen from Table 18, the wide-angle lens 6 in the sixth embodiment can meet the requirements of conditions (1) to (7).

[0113] Table 18

[0114]

[0115] Furthermore, the optical performance of the wide-angle lens 6 in the sixth embodiment also meets the requirements, by Figure 11 It can be seen that the field curvature of the wide-angle lens 6 in the sixth embodiment is between -0.01mm and 0.01mm. Figure 12 It can be seen that the distortion of the wide-angle lens 6 in the sixth embodiment is between -8% and 0%. Figure 13 As can be seen, the wide-angle lens 6 of the sixth embodiment has the following characteristics: when the image height is 0.000mm, its root mean square radius of the light spot is 0.572μm and its geometric radius is 1.286μm; when the image height is 1,866mm, its root mean square radius of the light spot is 0.731μm and its geometric radius is 3.285μm; when the image height is 3.731mm, its root mean square radius of the light spot is 0.903μm and its geometric radius is 4.408μm; when the image height is 5.596mm, its root mean square radius of the light spot is 0.893μm and its geometric radius is 3.268μm; and when the image height is 7.462mm, its root mean square radius of the light spot is 1.211μm and its geometric radius is 5.068μm. Clearly, the field curvature and distortion of the wide-angle lens 6 of the sixth embodiment can be effectively corrected, thus achieving better optical performance.

[0116] Although the fifth and sixth lenses in the above embodiments are cemented lenses, they are not limited to this in other embodiments. The fifth lens can be a single positive refractive meniscus lens, and its object side can be concave and its image side can be convex, or its object side can be convex and its image side can be concave; the sixth lens can also be a single negative refractive biconvex or meniscus lens, and its object side can be convex and its image side can be concave, or its object side can be convex and its image side can be convex. In addition, the lenses in the above embodiments are all made of glass, which helps to give the lens better temperature resistance.

[0117] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A wide-angle lens, characterized in that, include: The first lens has negative refractive power and is a meniscus lens; The second lens has refractive power; The third lens has negative refractive power; The fourth lens has positive refractive power; The fifth lens is a meniscus lens with refractive power. The fifth lens includes a concave surface facing the object side and a convex surface facing the image side. The sixth lens has refractive power and includes a convex surface facing the object side; The seventh lens has positive refractive power; The eighth lens has refractive power and includes a concave surface facing the image side; The ninth lens has positive refractive power; and The tenth lens has positive refractive power and includes a convex surface facing the object side; The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, and the tenth lens are arranged sequentially along the optical axis from the object side to the image side.

2. The wide-angle lens as described in claim 1, characterized in that: The fifth lens has positive refractive power and includes a fifth front lens and a fifth rear lens, with no air gap between them. The fifth front lens is a biconcave lens with negative refractive power, and the fifth rear lens is a biconvex lens with positive refractive power. The fifth front lens and the fifth rear lens are arranged sequentially along the optical axis from the object side to the image side. The sixth lens includes a sixth front lens and a sixth rear lens, and there is no air gap between the sixth front lens and the sixth rear lens. The sixth front lens is a biconvex lens with positive refractive power, and the sixth rear lens has negative refractive power and includes a concave surface facing the object side. The sixth front lens and the sixth rear lens are arranged sequentially along the optical axis from the object side to the image side.

3. The wide-angle lens as described in claim 1, characterized in that: The first lens includes a convex surface facing the object side and a concave surface facing the image side; The second lens is a meniscus lens with negative refractive power, including a convex surface facing the object side and a concave surface facing the image side; The third lens is a biconcave lens, and includes one concave surface facing the object side and another concave surface facing the image side; The fourth lens is a biconvex lens, and includes one convex surface facing the object side and another convex surface facing the image side; The seventh lens is a biconvex lens, and includes one convex surface facing the object side and another convex surface facing the image side; The eighth lens has negative refractive power; and The ninth lens includes a convex surface facing the object side.

4. A wide-angle lens, characterized in that: The first lens has negative refractive power and is a meniscus lens; The second lens has refractive power and includes a convex surface facing the object side; The third lens has negative refractive power; The fourth lens has positive refractive power; The fifth lens is a meniscus lens with refractive power. The fifth lens includes a concave surface facing the object side and a convex surface facing the image side. The sixth lens has refractive power and includes a convex surface facing the object side; The seventh lens has positive refractive power; The eighth lens has negative refractive power; The ninth lens has refractive power and includes a convex surface facing the object side; and The tenth lens has positive refractive power and includes a convex surface facing the object side; The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, and the tenth lens are arranged sequentially along the optical axis from the object side to the image side.

5. The wide-angle lens as described in claim 4, characterized in that: The fifth lens has positive refractive power and includes a fifth front lens and a fifth rear lens. There is no air gap between the fifth front lens and the fifth rear lens. The fifth front lens is a biconcave lens with negative refractive power, and the fifth rear lens is a biconvex lens with positive refractive power. The fifth front lens and the fifth rear lens are arranged sequentially along the optical axis from the object side to the image side. The sixth lens includes a sixth front lens and a sixth rear lens, with no air gap between the sixth front lens and the sixth rear lens. The sixth front lens is a biconvex lens with positive refractive power, and the sixth rear lens has negative refractive power and includes a concave surface facing the object side. The sixth front lens and the sixth rear lens are arranged sequentially along the optical axis from the object side to the image side.

6. The wide-angle lens as described in claim 4, characterized in that: The first lens includes a convex surface facing the object side and a concave surface facing the image side; The second lens is a meniscus lens with negative refractive power, and further includes a concave surface facing the image side; The third lens is a biconcave lens, and includes one concave surface facing the object side and another concave surface facing the image side; The fourth lens is a biconvex lens, and includes one convex surface facing the object side and another convex surface facing the image side; The seventh lens is a biconvex lens, and includes one convex surface facing the object side and another convex surface facing the image side; The eighth lens includes a concave surface facing the image side; and The ninth lens has positive refractive power.

7. The wide-angle lens as described in claim 2 or 5, characterized in that: The sixth rear lens is a meniscus lens and further includes a convex surface facing the image side; The eighth lens is a biconcave lens and includes a concave surface facing the object. The ninth lens is a biconvex lens, and includes a convex surface facing the image side; and The tenth lens is a biconvex lens, and further includes another convex surface facing the image side.

8. The wide-angle lens as described in claim 2 or 5, characterized in that: The sixth rear lens is a biconcave lens and includes a concave surface facing the image side; The eighth lens is a meniscus lens and includes a convex surface facing the object. The ninth lens is a meniscus lens and includes a concave surface facing the image side; and The tenth lens is a biconvex lens, and further includes another convex surface facing the image side.

9. The wide-angle lens as described in claim 2 or 5, characterized in that: The sixth rear lens is a biconcave lens and includes a concave surface facing the image side; The eighth lens is a meniscus lens and includes a convex surface facing the object. The ninth lens is a meniscus lens and includes a concave surface facing the image side; and The tenth lens is a meniscus lens and further includes a concave surface facing the image side.

10. The wide-angle lens as described in any one of claims 1 to 6, characterized in that, The wide-angle lens meets at least one of the following conditions: 6≤TTL / BFL≤9; 6≤TTL / IH≤10; 6.5≤TTL / f≤10.5; -7≤f1 / f≤-3; 6≤f9 / f≤15; Vd10≤21; 9≤(Vd1+Vd2+Vd3) / Vd4≤11; Wherein, TTL is the distance from the object side of the first lens to the imaging plane on the optical axis, BFL is the distance from the image side of the tenth lens to the imaging plane on the optical axis, IH is the image height of the wide-angle lens, f is the effective focal length of the wide-angle lens, f1 is the effective focal length of the first lens, f9 is the effective focal length of the ninth lens, Vd1 is the Abbe coefficient of the first lens, Vd2 is the Abbe coefficient of the second lens, Vd3 is the Abbe coefficient of the third lens, Vd4 is the Abbe coefficient of the fourth lens, and Vd10 is the Abbe coefficient of the tenth lens.

Images