TWI677731B - Lens assembly - Google Patents

Abstract

An imaging lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens is a meniscus lens having positive refractive power and includes a convex surface facing an object side and a concave surface facing an image side. The second lens has refractive power. The third lens has refractive power. The fourth lens has refractive power. The fifth lens has positive refractive power and includes a convex surface facing the image side. The sixth lens has negative refractive power and includes a concave surface facing the image side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are sequentially arranged from the object side to the image side along an optical axis. The imaging lens satisfies the following conditions: 3 <D ₁ / T ₆ <9; wherein D ₁ is an optical effective diameter of one object side of the first lens, and T ₆ is a thickness of the sixth lens on the optical axis.

Description

Imaging lens (26)

The invention relates to an imaging lens.

The current development trend of imaging lenses, in addition to the continuous development of large apertures, also needs to have both miniaturization and high-resolution capabilities with different application requirements. Another new type of imaging lens can meet the characteristics of large aperture, miniaturization and high resolution at the same time.

In view of this, the main object of the present invention is to provide an imaging lens which has characteristics of large aperture, miniaturization and high resolution, but still has good optical performance.

The imaging lens of the present invention includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens is a meniscus lens having positive refractive power and includes a convex surface facing an object side and a concave surface facing an image side. The second lens has refractive power. The third lens has refractive power. The fourth lens has refractive power. The fifth lens has positive refractive power and includes a convex surface facing the image side. The sixth lens has negative refractive power and includes a concave surface facing the image side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are sequentially arranged from the object side to the image side along an optical axis. The imaging lens satisfies the following conditions: 3 <D ₁ / T ₆ <9; wherein D ₁ is an optical effective diameter of one object side of the first lens, and T ₆ is a thickness of the sixth lens on the optical axis.

The imaging lens of the present invention may further include a seventh lens disposed between the fourth lens and the fifth lens. The seventh lens has negative refractive power. The fourth lens includes a convex surface facing the object side, and the fifth lens may further include a concave surface. On the object side, the sixth lens may further include a convex surface facing the object side.

Another imaging lens of the present invention includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens is a meniscus lens having positive refractive power and includes a convex surface facing an object side and a concave surface facing an image side. The second lens has refractive power. The third lens has refractive power. The fourth lens has refractive power. The fifth lens has positive refractive power and includes a convex surface facing the image side. The sixth lens has negative refractive power and includes a concave surface facing the image side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are sequentially arranged from the object side to the image side along an optical axis. The imaging lens meets the following conditions: -20mm <f × ((f ₁ -f ₆ ) / (T ₅ + T ₆ -R ₆₂ + R ₅₂ )) <-5mm; where f is one of the effective focal lengths of the imaging lens, f ₁ is an effective focal length of the first lens, f ₆ is an effective focal length of the sixth lens, T ₅ is a thickness of the fifth lens on the optical axis, T ₆ is a thickness of the sixth lens on the optical axis, R ₅₂ is a radius of curvature of one image side of the fifth lens, and R ₆₂ is a radius of curvature of one image side of the sixth lens.

Another imaging lens of the present invention may further include a seventh lens disposed between the fourth lens and the fifth lens. The seventh lens has negative refractive power, the fourth lens includes a convex surface facing the object side, and the fifth lens may further include a The concave surface faces the object side, and the sixth lens may further include a convex surface facing the object side.

The second lens is a meniscus lens and includes a convex surface facing the object side and a concave surface facing the image side. The third lens has a positive refractive power and includes a convex surface facing the object side.

The second lens has a negative refractive power.

The imaging lens meets the following conditions: 37mm <| f × (R ₂₁ + R ₂₂ ) / (R ₂₁ -R ₂₂ ) | <55mm; where f is one of the effective focal lengths of the imaging lens and R ₂₁ is one of the second lenses One curvature radius of the object side, R ₂₂ is one curvature radius of one image side of the second lens.

The imaging lens satisfies the following conditions: 10mm <| AAG × (R ₂₁ + R ₂₂ ) / (R ₂₁ -R ₂₂ ) | <20mm; where AAG is a lens from one image side of the first lens to a lens closest to the image side The sum of one air distance of one object side on the optical axis, R ₂₁ is a curvature radius of one object side of the second lens, and R ₂₂ is one curvature radius of one image side of the second lens.

The imaging lens satisfies the following conditions: 16 <| F × (R ₂₁ + R ₂₂ ) / (R ₂₁ -R ₂₂ ) | <25; where F is the aperture value of one of the imaging lenses (F-number) and R ₂₁ is A curvature radius of one object side of the second lens, and R ₂₂ is a curvature radius of one image side of the second lens.

The imaging lens satisfies the following conditions: -1.8mm <(R ₅₂ + R ₆₂ ) × (R ₃₁ / f ₁ ) <0mm; where R ₃₁ is a radius of curvature of one object side of the third lens, and R ₅₂ is the first One of the five lenses has a radius of curvature of one image side, R ₆₂ is one of the curvatures of one image side of the sixth lens, and f ₁ is one of the effective focal lengths of the first lens.

The imaging lens satisfies the following conditions: 0mm <| f ₂₃₄ | <50mm; wherein f ₂₃₄ is an effective focal length of a combination of the second lens, the third lens, and the fourth lens.

The imaging lens satisfies the following conditions: 1.2 <f / D ₁ <2.5; where f is an effective focal length of the imaging lens and D ₁ is an optical effective diameter of an object side of the first lens.

The imaging lens meets the following conditions: -35mm <(f ₁ × f ₆ ) / (T ₁ + T ₂ + T ₆ ) <-6mm; where f ₁ is one of the effective focal lengths of the first lens and f ₆ is the sixth An effective focal length of a lens, T ₁ is a thickness of the first lens on the optical axis, T ₂ is a thickness of the second lens on the optical axis, and T ₆ is a thickness of the sixth lens on the optical axis.

The imaging lens meets the following conditions: 1.3mm <(f ₁ -f ₆ ) / ((T ₅ + T ₆ ) / G ₅ ) <5mm; where f ₁ is the effective focal length of one of the first lenses and f ₆ is the first The effective focal length of one of the six lenses, T ₅ is the thickness of the fifth lens on the optical axis, T ₆ is the thickness of the sixth lens on the optical axis, and G ₅ is the distance from the image side of the fifth lens to the sixth lens. An object side is an air gap on the optical axis.

The imaging lens satisfies the following conditions: 10mm <(R ₁₁ + R ₁₂ + R ₅₂ + R ₆₂ ) × ((T ₅ + T ₆ ) / G ₅ ) <29mm; where R ₁₁ is an object side of the first lens One curvature radius, R ₁₂ is one curvature radius of one image side of the first lens, R ₅₂ is one curvature radius of one image side of the fifth lens, R ₆₂ is one curvature radius of one image side of the sixth lens, T ₅ is a thickness of the fifth lens on the optical axis, T ₆ is a thickness of the sixth lens on the optical axis, and G ₅ is an image side of the fifth lens to an object side of the sixth lens on the optical axis One air gap.

The imaging lens satisfies the following conditions: -3.5 <(R ₁₁ + R ₁₂ ) / (R ₅₂ -R ₆₂ ) <-1; where R ₁₁ is a radius of curvature of one object side of the first lens, and R ₁₂ is the first A radius of curvature of one image side of one lens, R ₅₂ is a radius of curvature of one image side of the fifth lens, and R ₆₂ is a radius of curvature of one image side of the sixth lens.

The imaging lens satisfies the following conditions: 0.5 <TTL / (R ₆₂ -R ₅₂ ) <1.9; where TTL is a distance from the object side of the first lens to an imaging surface on the optical axis, and R ₅₂ is the fifth lens One radius of curvature of one image side, and R ₆₂ is one radius of curvature of one image side of the sixth lens.

The imaging lens satisfies the following conditions: -3.5 <(f ₁ + f ₅ + f ₆ ) / (T ₅ + T ₆ -R ₆₂ + R ₅₂ ) <-1.5; where f ₁ is one of the effective focal lengths of the first lens , F ₅ is an effective focal length of the fifth lens, f ₆ is an effective focal length of the sixth lens, T ₅ is a thickness of the fifth lens on the optical axis, and T ₆ is a thickness of the sixth lens on the optical axis. R ₅₂ is a radius of curvature of one image side of the fifth lens, and R ₆₂ is a radius of curvature of one image side of the sixth lens.

The imaging lens satisfies the following conditions: -5 <(f ₁ -f ₆ ) / (T ₅ + T ₆ -R ₆₂ + R ₅₂ ) <-1; where f ₁ is an effective focal length of one of the first lenses, and f ₆ Is an effective focal length of the sixth lens, T ₅ is a thickness of the fifth lens on the optical axis, T ₆ is a thickness of the sixth lens on the optical axis, and R ₅₂ is a curvature of an image side of the fifth lens Radius, R ₆₂ is a radius of curvature of one image side of the sixth lens.

The imaging lens meets the following conditions: -10 <F × ((f ₁ -f ₆ ) / (T ₅ + T ₆ -R ₆₂ + R ₅₂ )) <-3; where F is the aperture value of one of the imaging lenses ( F-number), f ₁ is an effective focal length of the first lens, f ₆ is an effective focal length of the sixth lens, T ₅ is a thickness of the fifth lens on the optical axis, and T ₆ is a sixth lens of the optical axis. In the previous thickness, R ₅₂ is a radius of curvature of one image side of the fifth lens, and R ₆₂ is a radius of curvature of one image side of the sixth lens.

In order to make the above-mentioned objects, features, and advantages of the present invention more comprehensible, preferred embodiments are described in detail below in conjunction with the accompanying drawings.

1, 2, 3, 4, 5, 6, 7, 8‧‧‧ imaging lenses

L11, L21, L31, L41, L51, L61‧‧‧ First lens

L71, L811‧‧‧First lens

L12, L22, L32, L42, L52, L62‧‧‧Second lens

L72, L82‧‧‧Second lens

L13, L23, L33, L43, L53, L63‧‧‧ Third lens

L73, L83‧‧‧ Third lens

L14, L24, L34, L44, L54, L64‧‧‧ Fourth lens

L74, L84‧‧‧ Fourth lens

L15, L25, L35, L45, L55, L65‧‧‧ fifth lens

L75, L85‧‧‧ fifth lens

L16, L26, L36, L46, L56, L66 ‧‧‧ Sixth lens

L76, L86 ‧‧‧ Sixth lens

L37, L47‧‧‧ Seventh lens

ST1, ST2, ST3, ST4, ST5, ST6, ST7

ST8‧‧‧ aperture

OF1, OF2, OF3, OF4, OF5, OF6‧‧‧ filters

OF7, OF8‧‧‧ filters

OA1, OA2, OA3, OA4, OA5, OA6‧‧‧ Optical axis

OA7, OA8 ‧‧‧ Optical axis

IMA1, IMA2, IMA3, IMA4, IMA5‧‧‧ imaging surface

IMA6, IMA7, IMA8‧‧‧ imaging surface

S11, S12, S13, S14, S15‧‧‧ faces

S16, S17, S18, S19, S110‧‧‧ faces

S111, S112, S113, S114, S115‧‧‧ faces

S21, S22, S23, S24, S25

S26, S27, S28, S29, S210

S211, S212, S213, S214, S215

S31, S32, S33, S34, S35, S36‧‧‧ faces

S37, S38, S39, S310, S311, S312‧‧‧ faces

S313, S314, S315, S316, S317 ‧‧‧ faces

S41, S42, S43, S44, S45, S46‧‧‧ faces

S47, S48, S49, S410, S411, S412‧‧‧ faces

S413, S414, S415, S416, S417‧‧‧ faces

S51, S52, S53, S54, S55‧‧‧ faces

S56, S57, S58, S59, S510 ‧‧‧ faces

S511, S512, S513, S514, S515‧‧‧ faces

S61, S62, S63, S64, S65‧‧‧ faces

S66, S67, S68, S69, S610 ‧‧‧ faces

S611, S612, S613, S614, S615‧‧‧ faces

S71, S72, S73, S74, S75‧‧‧ faces

S76, S77, S78, S79, S710 ‧‧‧ faces

S711, S712, S713, S714, S715‧‧‧ faces

S81, S82, S83, S84, S85‧‧‧ faces

S86, S87, S88, S89, S810 ‧‧‧ faces

S811, S812, S813, S814, S815‧‧‧ faces

FIG. 1 is a schematic diagram of a lens configuration of a first embodiment of an imaging lens according to the present invention.

FIG. 2A is a Field Curvature diagram of the first embodiment of the imaging lens according to the present invention.

FIG. 2B is a distortion diagram of the first embodiment of the imaging lens according to the present invention.

FIG. 2C is a Modulation Transfer Function diagram of the first embodiment of the imaging lens according to the present invention.

FIG. 3 is a schematic diagram of a lens configuration of a second embodiment of an imaging lens according to the present invention.

FIG. 4A is a Field Curvature diagram of a second embodiment of an imaging lens according to the present invention.

FIG. 4B is a distortion diagram of a second embodiment of the imaging lens according to the present invention.

FIG. 4C is a Modulation Transfer Function diagram of the second embodiment of the imaging lens according to the present invention.

FIG. 5 is a schematic diagram of a lens configuration of a third embodiment of an imaging lens according to the present invention.

FIG. 6A is a Field Curvature diagram of a third embodiment of an imaging lens according to the present invention.

FIG. 6B is a distortion diagram of a third embodiment of the imaging lens according to the present invention.

FIG. 6C is a Modulation Transfer Function diagram of a third embodiment of an imaging lens according to the present invention.

FIG. 7 is a lens configuration diagram of a fourth embodiment of an imaging lens according to the present invention.

FIG. 8A is a Field Curvature diagram of a fourth embodiment of an imaging lens according to the present invention.

FIG. 8B is a distortion diagram of a fourth embodiment of the imaging lens according to the present invention.

FIG. 8C is a modulation transfer function diagram of a fourth embodiment of the imaging lens according to the present invention.

FIG. 9 is a lens configuration diagram of a fifth embodiment of an imaging lens according to the present invention.

FIG. 10A is a Field Curvature diagram of a fifth embodiment of an imaging lens according to the present invention.

FIG. 10B is a distortion diagram of a fifth embodiment of the imaging lens according to the present invention.

FIG. 10C is a Modulation Transfer Function diagram of a fifth embodiment of an imaging lens according to the present invention.

FIG. 11 is a schematic diagram of a lens configuration of a sixth embodiment of an imaging lens according to the present invention.

FIG. 12A is a Field Curvature diagram of a sixth embodiment of an imaging lens according to the present invention.

FIG. 12B is a distortion diagram of a sixth embodiment of an imaging lens according to the present invention.

FIG. 12C is a Modulation Transfer Function diagram of a sixth embodiment of an imaging lens according to the present invention.

Please refer to FIG. 1, which is a schematic diagram of a lens configuration of a first embodiment of an imaging lens according to the present invention. The imaging lens 1 includes an aperture ST1, a first lens L11, a second lens L12, a third lens L13, a fourth lens L14, and a first lens along an optical axis OA1 in order from an object side to an image side. Five lenses L15, a sixth lens L16, and a filter OF1. During imaging, the light from the object side is finally imaged on an imaging surface IMA1.

The first lens L11 is a meniscus lens with positive refractive power. The object side S12 is convex, the image side S13 is concave, and both the object side S12 and the image side S13 are aspherical surfaces.

The second lens L12 is a meniscus lens with negative refractive power. The object side S14 is convex, the image side S15 is concave, and both the object side S14 and the image side S15 are aspheric surfaces.

The third lens L13 is a meniscus lens with positive refractive power, and its object side S16 It is convex, the image side S17 is concave, and both the object side S16 and the image side S17 are aspherical surfaces.

The fourth lens L14 is a meniscus lens with positive refractive power, and its object side S18 is convex, the image side S19 is concave, and both the object side S18 and the image side S19 are aspherical surfaces.

The fifth lens L15 is a meniscus lens with positive refractive power, and its object side S110 is concave, the image side S111 is convex, and both the object side S110 and the image side S111 are aspherical surfaces.

The sixth lens L16 is a meniscus lens with negative refractive power. The object side S112 is convex, the image side S113 is concave, and the object side S112 and the image side S113 are aspherical surfaces.

Both the object side S114 and the image side S115 of the filter OF1 are flat.

In addition, the imaging lens 1 in the first embodiment satisfies any one of the following sixteen conditions: 3 <D1 ₁ / T1 ₆ <9 (1)

-20mm <f1 × ((f1 ₁ -f1 ₆ ) / (T1 ₅ + T1 ₆ -R1 ₆₂ + R1 ₅₂ )) <-5mm (2)

37mm <| f1 × (R1 ₂₁ + R1 ₂₂ ) / (R1 ₂₁ -R1 ₂₂ ) | <55mm (3)

10mm <| AAG1 × (R1 ₂₁ + R1 ₂₂ ) / (R1 ₂₁ -R1 ₂₂ ) | <20mm (4)

16 <| F1 × (R1 ₂₁ + R1 ₂₂ ) / (R1 ₂₁ -R1 ₂₂ ) | <25 (5)

-1.8mm <(R1 ₅₂ + R1 ₆₂ ) × (R1 ₃₁ / f1 ₁ ) <0mm (6)

0mm <| f1 ₂₃₄ | <50mm (7)

1.2 <f1 / D1 ₁ <2.5 (8)

-35mm <(f1 ₁ × f1 ₆ ) / (T1 ₁ + T1 ₂ + T1 ₆ ) <-6mm (9)

1.3mm <(f1 ₁ -f1 ₆ ) / ((T1 ₅ + T1 ₆ ) / G1 ₅ ) <5mm (10)

10mm <(R1 ₁₁ + R1 ₁₂ + R1 ₅₂ + R1 ₆₂ ) × ((T1 ₅ + T1 ₆ ) / G1 ₅ ) <29mm (11)

-3.5 <(R1 ₁₁ + R1 ₁₂ ) / (R1 ₅₂ -R1 ₆₂ ) <-1 (12)

0.5 <TTL1 / (R1 ₆₂ -R1 ₅₂ ) <1.9 (13)

-3.5 <(f1 ₁ + f1 ₅ + f1 ₆ ) / (T1 ₅ + T1 ₆ -R1 ₆₂ + R1 ₅₂ ) <-1.5 (14)

-5 <(f1 ₁ -f1 ₆ ) / (T1 ₅ + T1 ₆ -R1 ₆₂ + R1 ₅₂ ) <-1 (15)

-10 <F1 × ((f1 ₁ -f1 ₆ ) / (T1 ₅ + T1 ₆ -R1 ₆₂ + R1 ₅₂ )) <-3 (16)

Among them, f1 ₁ is an effective focal length of the first lens L11, f1 ₅ is an effective focal length of the fifth lens L15, f1 ₆ is an effective focal length of the sixth lens L16, and f1 ₂₃₄ is the second lens L12 and the third lens L13. And the fourth lens L14 is an effective focal length, f1 is an effective focal length of the imaging lens 1, R1 ₁₁ is a curvature radius of the object side S12 of the first lens L11, and R1 ₁₂ is an image side S13 of the first lens L11. A curvature radius, R1 ₂₁ is a curvature radius of the object side S14 of the second lens L12, R1 ₂₂ is a curvature radius of the image side S15 of the second lens L12, and R1 ₃₁ is a curvature of the object side S16 of the third lens L13 Radius, R1 ₅₂ is a radius of curvature of the image side S111 of the fifth lens L15, R1 ₆₂ is a radius of curvature of the image side S113 of the sixth lens L16, and D1 ₁ is an optical effective diameter of the object side S12 of the first lens L11 , AAG1 is the total air distance of the image side S13 of the first lens L11 to the object side S112 of the lens L16 closest to the image side on the optical axis OA1, and F1 is one of the F-number of the imaging lens 1, T1 ₁ is the thickness of the first lens L11 on the optical axis OA1, and T1 ₂ is the second lens L12 on the optical axis One thickness on OA1, T1 ₅ is the thickness of the fifth lens L15 on the optical axis OA1, T1 ₆ is the thickness of the sixth lens L16 on the optical axis OA1, and G1 ₅ is the image side of the fifth lens L15 S111 to The object side S112 of the sixth lens L16 is an air gap on the optical axis OA1, and TTL1 is a distance between the object side S12 of the first lens L11 and the imaging plane IMA1 on the optical axis OA1.

Utilizing the above lens, aperture ST1 and a design that satisfies any of the conditions (1) to (16), the imaging lens 1 can effectively shorten the total length of the lens, effectively reduce the aperture value, effectively reduce the weight of the lens, and effectively Improved resolution, effective correction of chromatic aberration, effective correction of aberration.

Table 1 is a table of related parameters of each lens of imaging lens 1 in FIG. 1. The data in Table 1 shows that the effective focal length of imaging lens 1 of the first embodiment is equal to 4.2 mm, the aperture value is equal to 1.75, the total lens length is equal to 4.67 mm, The angle of view is equal to 74.55 degrees.

The aspheric surface depression z of each 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 ¹² + Eh ¹⁴ + Fh ¹⁶ + Gh ¹⁸

Where: c: curvature; h: vertical distance from any point on the lens surface to the optical axis; k: conic coefficient; A ~ G: aspheric coefficient.

Table 2 is a table of related parameters of the aspheric surface of each lens in Table 1, where k is the Conic Constant and A ~ G are aspheric coefficients.

Table 3 shows the parameter values in the conditions (1) to (16) and the calculated values of the conditions (1) to (16). As can be seen from Table 3, the imaging lens 1 of the first embodiment satisfies the conditions (1) to Requirements of Condition (16).

In addition, the optical performance of the imaging lens 1 of the first embodiment can also meet requirements, which can be seen from FIGS. 2A to 2C. FIG. 2A is a Field Curvature diagram of the imaging lens 1 of the first embodiment. FIG. 2B is a distortion diagram of the imaging lens 1 of the first embodiment. FIG. 2C shows a Modulation Transfer Function chart of the imaging lens 1 of the first embodiment.

It can be seen from FIG. 2A that the imaging lens 1 of the first embodiment has a pair of rays with a wavelength of 0.470 μm, 0.510 μm, 0.550 μm, 0.610 μm, and 0.650 μm in the direction of the Tangential and Sagittal directions. The field curvature is between -0.06mm and 0.06mm.

From Figure 2B (the five lines in the figure are almost superimposed so that only one line appears), it can be seen that the pair of imaging lenses of the first embodiment has a wavelength of 0.470 μm, 0.510 μm, 0.550 μm, 0.610 μm, 0.650 The distortion caused by the light of μm is between -1.0% and 2.5%.

As can be seen from Figure 2C, the imaging lens 1 of the first embodiment has a pair of rays with a wavelength ranging from 0.4700 μm to 0.6500 μm, respectively in the Tangential direction and the Sagittal direction, and the field heights are 0.0000 respectively. mm, 1.4208mm, 2.4864mm, 3.1968mm, the spatial frequency is between 0lp / mm and 360lp / mm, and its modulation conversion function value is between 0.07 and 1.0.

It is obvious that the field curvature and distortion of the imaging lens 1 of the first embodiment can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 3, which is a schematic diagram of a lens configuration of a second embodiment of an imaging lens according to the present invention. The imaging lens 2 includes an aperture ST2, a first lens L21, a second lens L22, a third lens L23, a fourth lens L24, and a first lens along an optical axis OA2 in order from an object side to an image side. Five lenses L25, a sixth lens L26, and a filter OF2. During imaging, the light from the object side is finally imaged on an imaging surface IMA2.

The first lens L21 is a meniscus lens with positive refractive power. The object side surface S22 is convex, the image side S23 is concave, and both the object side S22 and the image side S23 are aspherical surfaces.

The second lens L22 is a meniscus lens with negative refractive power. The object side S24 is convex, the image side S25 is concave, and both the object side S24 and the image side S25 are aspherical surfaces.

The third lens L23 is a biconvex lens with positive refractive power. The object side surface S26 is a convex surface, the image side surface S27 is a convex surface, and both the object side surface S26 and the image side surface S27 are aspherical surfaces.

The fourth lens L24 is a meniscus lens with negative refractive power. The object side surface S28 is a concave surface, the image side surface S29 is a convex surface, and the object side surface S28 and the image side surface S29 are aspherical surfaces.

The fifth lens L25 is a biconvex lens with positive refractive power. The object side S210 is convex, the image side S211 is convex, and both the object side S210 and the image side S211 are aspherical surfaces.

The sixth lens L26 is a biconcave lens with negative refractive power. The object side surface S212 is a concave surface, the image side surface S213 is a concave surface, and the object side surface S212 and the image side surface S213 are aspherical surfaces.

The object side S214 and the image side S215 of the filter OF2 are flat.

In addition, the imaging lens 2 in the second embodiment satisfies any of the following sixteen conditions: 3 <D2 ₁ / T2 ₆ <9 (17)

-20mm <f2 × ((f2 ₁ -f2 ₆ ) / (T2 ₅ + T2 ₆ -R2 ₆₂ + R2 ₅₂ )) <-5mm (18)

37mm <| f2 × (R2 ₂₁ + R2 ₂₂ ) / (R2 ₂₁ -R2 ₂₂ ) | <55mm (19)

10mm <| AAG2 × (R2 ₂₁ + R2 ₂₂ ) / (R2 ₂₁ -R2 ₂₂ ) | <20mm (20)

16 <| F2 × (R2 ₂₁ + R2 ₂₂ ) / (R2 ₂₁ -R2 ₂₂ ) | <25 (21)

-1.8mm <(R2 ₅₂ + R2 ₆₂ ) × (R2 ₃₁ / f2 ₁ ) <0mm (22)

0mm <| f2 ₂₃₄ | <50mm (23)

1.2 <f2 / D2 ₁ <2.5 (24)

-35mm <(f2 ₁ × f2 ₆ ) / (T2 ₁ + T2 ₂ + T2 ₆ ) <-6mm (25)

1.3mm <(f2 ₁ -f2 ₆ ) / ((T2 ₅ + T2 ₆ ) / G2 ₅ ) <5mm (26)

10mm <(R2 ₁₁ + R2 ₁₂ + R2 ₅₂ + R2 ₆₂ ) × ((T2 ₅ + T2 ₆ ) / G2 ₅ ) <29mm (27)

-3.5 <(R2 ₁₁ + R2 ₁₂ ) / (R2 ₅₂ -R2 ₆₂ ) <-1 (28)

0.5 <TTL2 / (R2 ₆₂ -R2 ₅₂ ) <1.9 (29)

-3.5 <(f2 ₁ + f2 ₅ + f2 ₆ ) / (T2 ₅ + T2 ₆ -R2 ₆₂ + R2 ₅₂ ) <-1.5 (30)

-5 <(f2 ₁ -f2 ₆ ) / (T2 ₅ + T2 ₆ -R2 ₆₂ + R2 ₅₂ ) <-1 (31)

-10 <F2 × ((f2 ₁ -f2 ₆ ) / (T2 ₅ + T2 ₆ -R2 ₆₂ + R2 ₅₂ )) <-3 (32)

The above f2 ₁ , f2 ₅ , f2 ₆ , f2 ₂₃₄ , f2, R2 ₁₁ , R2 ₁₂ , R2 ₂₁ , R2 ₂₂ , R2 ₃₁ , R2 ₅₂ , R2 ₆₂ , D2 ₁ , AAG2, F2, T2 ₁ , T2 ₂ , T2 The definitions of ₅ , T2 ₆ , G2 ₅ and TTL2 are the same as f1 ₁ , f1 ₅ , f1 ₆ , f1 ₂₃₄ , f1, R1 ₁₁ , R1 ₁₂ , R1 ₂₁ , R1 ₂₂ , R1 ₃₁ , R1 ₅₂ , R1 _The definitions of ₆₂ , D1 ₁ , AAG1, F1, T1 ₁ , T1 ₂ , T1 ₅ , T1 ₆ , G1 ₅ and TTL1 are the same, and will not be repeated here.

Utilizing the above lens, aperture ST2 and a design that satisfies any one of the conditions (17) to (32), the imaging lens 2 can effectively shorten the total length of the lens, effectively reduce the aperture value, effectively reduce the weight of the lens, and effectively Improved resolution, effective correction of chromatic aberration, effective correction of aberration.

Table 4 shows the relevant parameters of each lens of imaging lens 2 in Figure 3. The data in Table 4 shows that the effective focal length of imaging lens 2 of the second embodiment is equal to 3.62 mm, the aperture value is equal to 1.75, the total lens length is equal to 4.98 mm, The angle of view is equal to 83.98 degrees.

The aspheric surface depression z of each lens in Table 4 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 ¹² + Eh ¹⁴ + Fh ¹⁶ + Gh ¹⁸

Where: c: curvature; h: vertical distance from any point on the lens surface to the optical axis; k: conic coefficient; A ~ G: aspheric coefficient.

Table 5 is a table of related parameters of the aspheric surface of each lens in Table 4, where k is the Conic Constant and A ~ G are aspheric coefficients.

Table 6 shows the values of the parameters in conditions (17) to (32) and the calculated values of conditions (17) to (32). As can be seen from Table 6, the imaging lens 2 of the second embodiment all satisfies the conditions (17) to Requirement of condition (32).

In addition, the optical performance of the imaging lens 2 of the second embodiment can also meet the requirements, which can be seen from FIGS. 4A to 4C. FIG. 4A is a Field Curvature diagram of the imaging lens 2 of the second embodiment. FIG. 4B is a distortion diagram of the imaging lens 2 of the second embodiment. FIG. 4C shows a Modulation Transfer Function chart of the imaging lens 2 of the second embodiment.

It can be seen from FIG. 4A that the imaging lens 2 of the second embodiment has a pair of rays with a wavelength of 0.470 μm, 0.510 μm, 0.555 μm, 0.610 μm, and 0.650 μm in the direction of the Tangential and Sagittal directions. The field curvature is between -0.13mm and 0.06mm.

It can be seen from FIG. 4B that the distortion produced by the imaging lens 2 of the second embodiment for light having a wavelength of 0.470 μm, 0.510 μm, 0.555 μm, 0.610 μm, and 0.650 μm is between 0.0% and 2.1%.

As can be seen from Figure 4C, the imaging lens 2 of the second embodiment has a pair of rays with a wavelength ranging from 0.4700 μm to 0.6500 μm, respectively in the Tangential direction and the Sagittal direction, and the field heights are 0.0000. mm, 0.9780mm, 2.6080mm, 3.2600 mm, the spatial frequency is between 0lp / mm and 360lp / mm, and its modulation transfer function value is between 0.01 and 1.0.

It is obvious that the field curvature and distortion of the imaging lens 2 of the second embodiment can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 5, which is a schematic diagram of a lens configuration of a third embodiment of an imaging lens according to the present invention. The imaging lens 3 includes an aperture ST3, a first lens L31, a second lens L32, a third lens L33, a fourth lens L34, and a first lens, in order from an object side to an image side along an optical axis OA3. Seven lenses L37, a fifth lens L35, a sixth lens L36, and a filter OF3. During imaging, the light from the object side is finally imaged on an imaging surface IMA3.

The first lens L31 is a meniscus lens with positive refractive power. The object side surface S32 is a convex surface, the image side surface S33 is a concave surface, and both the object side surface S32 and the image side surface S33 are aspherical surfaces.

The second lens L32 is a meniscus lens with negative refractive power. The object side surface S34 is a convex surface, the image side surface S35 is a concave surface, and both the object side surface S34 and the image side surface S35 are aspherical surfaces.

The third lens L33 is a meniscus lens with positive refractive power. The object side S36 is convex, the image side S37 is concave, and both the object side S36 and the image side S37 are aspherical surfaces.

The fourth lens L34 is a biconvex lens with positive refractive power. The object side surface S38 is convex, the image side S39 is convex, and both the object side S38 and the image side S39 are aspherical surfaces.

The seventh lens L37 is a meniscus lens with negative refractive power. Its object side S310 is convex, the image side S311 is concave, and both the object side S310 and the image side S311 are aspherical surfaces.

The fifth lens L35 is a meniscus lens with positive refractive power. The object side S312 is concave, the image side S313 is convex, and the object side S312 and the image side S313 are aspherical surfaces.

The sixth lens L36 is a meniscus lens with negative refractive power, and its object side S314 It is convex, the image side S315 is concave, and the object side S314 and the image side S315 are aspherical surfaces.

The filter OF3 has a flat object side S316 and an image side S317.

In addition, the imaging lens 3 in the third embodiment satisfies any one of the following sixteen conditions: 3 <D3 ₁ / T3 ₆ <9 (33)

-20mm <f3 × ((f3 ₁ -f3 ₆ ) / (T3 ₅ + T3 ₆ -R3 ₆₂ + R3 ₅₂ )) <-5mm (34)

37mm <| f3 × (R3 ₂₁ + R3 ₂₂ ) / (R3 ₂₁ -R3 ₂₂ ) | <55mm (35)

10mm <| AAG3 × (R3 ₂₁ + R3 ₂₂ ) / (R3 ₂₁ -R3 ₂₂ ) | <20mm (36)

16 <| F3 × (R3 ₂₁ + R3 ₂₂ ) / (R3 ₂₁ -R3 ₂₂ ) | <25 (37)

-1.8mm <(R3 ₅₂ + R3 ₆₂ ) × (R3 ₃₁ / f3 ₁ ) <0mm (38)

0mm <| f3 ₂₃₄ | <50mm (39)

1.2 <f3 / D3 ₁ <2.5 (40)

-35mm <(f3 ₁ × f3 ₆ ) / (T3 ₁ + T3 ₂ + T3 ₆ ) <-6mm (41)

1.3mm <(f3 ₁ -f3 ₆ ) / ((T3 ₅ + T3 ₆ ) / G3 ₅ ) <5mm (42)

10mm <(R3 ₁₁ + R3 ₁₂ + R3 ₅₂ + R3 ₆₂ ) × ((T3 ₅ + T3 ₆ ) / G3 ₅ ) <29mm (43)

-3.5 <(R3 ₁₁ + R3 ₁₂ ) / (R3 ₅₂ -R3 ₆₂ ) <-1 (44)

0.5 <TTL3 / (R3 ₆₂ -R3 ₅₂ ) <1. (45)

-3.5 <(f3 ₁ + f3 ₅ + f3 ₆ ) / (T3 ₅ + T3 ₆ -R3 ₆₂ + R3 ₅₂ ) <-1. (46)

-5 <(f3 ₁ -f3 ₆ ) / (T3 ₅ + T3 ₆ -R3 ₆₂ + R3 ₅₂ ) <-1 (47)

-10 <F3 × ((f3 ₁ -f3 ₆ ) / (T3 ₅ + T3 ₆ -R3 ₆₂ + R3 ₅₂ )) <-3 (48)

The above f3 ₁ , f3 ₅ , f3 ₆ , f3 ₂₃₄ , f3, R3 ₁₁ , R3 ₁₂ , R3 ₂₁ , R3 ₂₂ , R3 ₃₁ , R3 ₅₂ , R3 ₆₂ , D3 ₁ , AAG3, F3, T3 ₁ , T3 ₂ , T3 ₅ , T3 ₆ , G3 ₅ and TTL3 are defined as f1 ₁ , f1 ₅ , f1 ₆ , f1 ₂₃₄ , f1, R1 ₁₁ , R1 ₁₂ , R1 ₂₁ , R1 ₂₂ , R1 ₃₁ , R1 ₅₂ , R1 _The definitions of ₆₂ , D1 ₁ , AAG1, F1, T1 ₁ , T1 ₂ , T1 ₅ , T1 ₆ , G1 ₅ and TTL1 are the same, and will not be repeated here.

Utilizing the above lens, aperture ST3 and a design that satisfies any one of conditions (33) to (48), the imaging lens 3 can effectively shorten the total lens length, effectively reduce the aperture value, effectively reduce the weight of the lens, and effectively Improved resolution, effective correction of chromatic aberration, effective correction of aberration.

Table 7 shows the relevant parameters of each lens of imaging lens 3 in Figure 5. The data in Table 7 shows that the effective focal length of imaging lens 3 of the third embodiment is equal to 4.607 mm, the aperture value is equal to 1.75, the total lens length is equal to 5.32 mm, The angle of view is equal to 79.07 degrees.

The aspheric surface depression z of each lens in Table 7 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 ¹² + Eh ¹⁴ + Fh ¹⁶ + Gh ¹⁸

Where: c: curvature; h: vertical distance from any point on the lens surface to the optical axis; k: conic coefficient; A ~ G: aspheric coefficient.

Table 8 is a table of related parameters of the aspheric surface of each lens in Table 7, where k is the Conic Constant and A ~ G are the aspheric coefficients.

Table 9 shows the parameter values in conditions (33) to (48) and the calculated values of conditions (33) to (48). As can be seen from Table 9, the imaging lens 3 of the third embodiment satisfies the conditions (33) to Requirement of condition (48).

In addition, the optical performance of the imaging lens 3 of the third embodiment can also meet the requirements, which can be seen from FIGS. 6A to 6C. FIG. 6A is a Field Curvature diagram of the imaging lens 3 of the third embodiment. FIG. 6B is a distortion diagram of the imaging lens 3 of the third embodiment. Fig. 6C shows the adjustment of the imaging lens 3 of the third embodiment. Modulation Transfer Function diagram.

It can be seen from FIG. 6A that the imaging lens 3 of the third embodiment has a pair of rays with a wavelength of 0.470 μm, 0.510 μm, 0.550 μm, 0.610 μm, and 0.650 μm in the direction of the tangential direction and the direction of the sagittal direction. The field curvature is between -0.05mm and 0.06mm.

It can be seen from FIG. 6B that the distortion produced by the imaging lens 3 of the third embodiment for light having a wavelength of 0.470 μm, 0.510 μm, 0.550 μm, 0.610 μm, 0.650 μm is between -0.1% and 1.4%.

As can be seen from Figure 6C, the imaging lens 3 of the third embodiment has a pair of rays with a wavelength ranging from 0.4700 μm to 0.6500 μm, respectively in the Tangential direction and the Sagittal direction, and the field heights are 0.0000 mm, 1.4208mm, 2.4864mm, 3.5520mm, the spatial frequency is between 0lp / mm and 360lp / mm, and its modulation transfer function value is between 0.05 and 1.0.

It is obvious that the field curvature and distortion of the imaging lens 3 of the third embodiment can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 7, which is a schematic diagram of a lens configuration of a fourth embodiment of an imaging lens according to the present invention. The imaging lens 4 includes a first lens L41, an aperture ST4, a second lens L42, a third lens L43, a fourth lens L44, and a first lens L41 in order from an object side to an image side along an optical axis OA4. Seven lenses L47, a fifth lens L45, a sixth lens L46, and a filter OF4. During imaging, the light from the object side is finally imaged on an imaging surface IMA4.

The first lens L41 is a meniscus lens with positive refractive power. The object side surface S41 is a convex surface, the image side surface S42 is a concave surface, and both the object side surface S41 and the image side surface S42 are aspherical surfaces.

The second lens L42 is a meniscus lens with positive refractive power, and its object side S44 It is convex, the image side S45 is concave, and both the object side S44 and the image side S45 are aspherical surfaces.

The third lens L43 is a biconvex lens with positive refractive power. The object side S46 is convex, the image side S47 is convex, and both the object side S46 and the image side S47 are aspherical surfaces.

The fourth lens L44 is a meniscus lens with negative refractive power. The object side S48 is convex, the image side S49 is concave, and both the object side S48 and the image side S49 are aspherical surfaces.

The seventh lens L47 is a meniscus lens with negative refractive power. The object side S410 is concave, the image side S411 is convex, and the object side S410 and the image side S411 are aspherical surfaces.

The fifth lens L45 is a meniscus lens with positive refractive power. The object side S412 is concave, the image side S413 is convex, and the object side S412 and the image side S413 are aspherical surfaces.

The sixth lens L46 is a meniscus lens with negative refractive power. The object side S414 is convex, the image side S415 is concave, and both the object side S414 and the image side S415 are aspherical surfaces.

Both the object side S416 and the image side S417 of the filter OF4 are flat.

In addition, the imaging lens 4 in the fourth embodiment satisfies any one of the following sixteen conditions: 3 <D4 ₁ / T4 ₆ <9 (49)

-20mm <f4 × ((f4 ₁ -f4 ₆ ) / (T4 ₅ + T4 ₆ -R4 ₆₂ + R4 ₅₂ )) <-5mm (50)

37mm <| f4 × (R4 ₂₁ + R4 ₂₂ ) / (R4 ₂₁ -R4 ₂₂ ) | <55mm (51)

10mm <| AAG4 × (R4 ₂₁ + R4 ₂₂ ) / (R4 ₂₁ -R4 ₂₂ ) | <20mm (52)

16 <| F4 × (R4 ₂₁ + R4 ₂₂ ) / (R4 ₂₁ -R4 ₂₂ ) | <25 (53)

-1.8mm <(R4 ₅₂ + R4 ₆₂ ) × (R4 ₃₁ / f4 ₁ ) <0mm (54)

0mm <| f4 ₂₃₄ | <50mm (55)

1.2 <f4 / D4 ₁ <2.5 (56)

-35mm <(f4 ₁ × f4 ₆ ) / (T4 ₁ + T4 ₂ + T4 ₆ ) <-6mm (57)

1.3mm <(f4 ₁ -f4 ₆ ) / ((T4 ₅ + T4 ₆ ) / G4 ₅ ) <5mm (58)

10mm <(R4 ₁₁ + R4 ₁₂ + R4 ₅₂ + R4 ₆₂ ) × ((T4 ₅ + T4 ₆ ) / G4 ₅ ) <29mm (59)

-3.5 <(R4 ₁₁ + R4 ₁₂ ) / (R4 ₅₂ -R4 ₆₂ ) <-1 (60)

0.5 <TTL4 / (R4 ₆₂ -R4 ₅₂ ) <1. (61)

-3.5 <(f4 ₁ + f4 ₅ + f4 ₆ ) / (T4 ₅ + T4 ₆ -R4 ₆₂ + R4 ₅₂ ) <-1. (62)

-5 <(f4 ₁ -f4 ₆ ) / (T4 ₅ + T4 ₆ -R4 ₆₂ + R4 ₅₂ ) <-1 (63)

-10 <F4 × ((f4 ₁ -f4 ₆ ) / (T4 ₅ + T4 ₆ -R4 ₆₂ + R4 ₅₂ )) <-3 (64)

The above f4 ₁ , f4 ₅ , f4 ₆ , f4 ₂₃₄ , f4, R4 ₁₁ , R4 ₁₂ , R4 ₂₁ , R4 ₂₂ , R4 ₃₁ , R4 ₅₂ , R4 ₆₂ , D4 ₁ , AAG4, F4, T4 ₁ , T4 ₂ , T4 The definitions of ₅ , T4 ₆ , G4 ₅ and TTL4 are the same as f1 ₁ , f1 ₅ , f1 ₆ , f1 ₂₃₄ , f1, R1 ₁₁ , R1 ₁₂ , R1 ₂₁ , R1 ₂₂ , R1 ₃₁ , R1 ₅₂ , R1 in the first embodiment. _The definitions of ₆₂ , D1 ₁ , AAG1, F1, T1 ₁ , T1 ₂ , T1 ₅ , T1 ₆ , G1 ₅ and TTL1 are the same, and will not be repeated here.

Utilizing the above lens, aperture ST4 and a design that satisfies any of the conditions (49) to (64), the imaging lens 4 can effectively shorten the total length of the lens, effectively reduce the aperture value, effectively reduce the weight of the lens, and effectively Improved resolution, effective correction of chromatic aberration, effective correction of aberration.

Table 10 is the relevant parameter table of each lens of imaging lens 4 in Figure 7. The data in Table 10 shows that the effective focal length of imaging lens 4 of the fourth embodiment is equal to 3.732mm and the aperture The value is equal to 1.9, the total lens length is equal to 5.0mm, and the angle of view is equal to 82.87 degrees.

The aspheric surface depression z of each lens in Table 10 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 ¹² + Eh ¹⁴ + Fh ¹⁶ + Gh ¹⁸

Where: c: curvature; h: vertical distance from any point on the lens surface to the optical axis; k: conic coefficient; A ~ G: aspheric coefficient.

Table 11 is a table of related parameters of the aspheric surface of each lens in Table 10, where k is Conic Constant and A ~ G are aspheric coefficients.

Table 12 shows the parameter values in conditions (49) to (64) and the calculated values of conditions (49) to (64). As can be seen from Table 12, the imaging lens 4 of the fourth embodiment all satisfies the condition (49 ) To condition (64).

In addition, the optical performance of the imaging lens 4 of the fourth embodiment can also meet the requirements, which can be seen from FIGS. 8A to 8C. FIG. 8A is a Field Curvature diagram of the imaging lens 4 of the fourth embodiment. FIG. 8B is a distortion diagram of the imaging lens 4 of the fourth embodiment. FIG. 8C is a diagram showing a Modulation Transfer Function of the imaging lens 4 of the fourth embodiment.

It can be seen from FIG. 8A that the imaging lens 4 of the fourth embodiment has a pair of rays with a wavelength of 0.460 μm, 0.510 μm, 0.555 μm, 0.610 μm, 0.650 μm in the direction of the tangential direction and the direction of the sagittal direction. The field curvature is between -0.03mm and 0.07mm.

It can be seen from FIG. 8B that the distortion produced by the imaging lens 4 of the fourth embodiment for light having a wavelength of 0.460 μm, 0.510 μm, 0.555 μm, 0.610 μm, 0.650 μm is between 0.0% and 2.1%.

As can be seen from FIG. 8C, the imaging lens 4 of the fourth embodiment has a pair of rays with a wavelength ranging from 0.4600 μm to 0.6500 μm, respectively in the Tangential direction and the Sagittal direction, and the field heights are 0.0000 respectively. mm, 1.3040mm, 2.2820mm, 3.2600 mm, the spatial frequency is between 0lp / mm and 360lp / mm, and its modulation transfer function value is between 0.01 and 1.0.

It is obvious that the field curvature and distortion of the imaging lens 4 of the fourth embodiment can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 9, which is a schematic diagram of a lens configuration of a fifth embodiment of an imaging lens according to the present invention. The imaging lens 5 includes an aperture ST5, a first lens L51, a second lens L52, a third lens L53, a fourth lens L54, and a first lens, in order from an object side to an image side along an optical axis OA5. Five lenses L55, a sixth lens L56, and a filter OF5. During imaging, the light from the object side is finally imaged on an imaging surface IMA5.

The first lens L51 is a meniscus lens with positive refractive power. The object side surface S52 is convex, the image side S53 is concave, and both the object side S52 and the image side S53 are aspherical surfaces.

The second lens L52 is a meniscus lens with negative refractive power. The object side S54 is convex, the image side S55 is concave, and both the object side S54 and the image side S55 are aspherical surfaces.

The third lens L53 is a biconvex lens with positive refractive power. The object side S56 is convex, the image side S57 is convex, and both the object side S56 and the image side S57 are aspherical surfaces.

The fourth lens L54 is a biconcave lens with negative refractive power. The object side S58 is concave, the image side S59 is concave, and both the object side S58 and the image side S59 are aspherical surfaces.

The fifth lens L55 is a meniscus lens with positive refractive power. The object side S510 is concave, the image side S511 is convex, and both the object side S510 and the image side S511 are aspherical surfaces.

The sixth lens L56 is a biconcave lens with negative refractive power. The object side S512 is concave, the image side S513 is concave, and both the object side S512 and the image side S513 are aspherical surfaces.

The object side S514 and the image side S515 of the filter OF5 are flat.

In addition, the imaging lens 5 in the fifth embodiment satisfies any of the following fifteen conditions: 3 <D5 ₁ / T5 ₆ <9 (65)

-20mm <f5 × ((f5 ₁ -f5 ₆ ) / (T5 ₅ + T5 ₆ -R5 ₆₂ + R5 ₅₂ )) <-5mm (66)

37mm <| f5 × (R5 ₂₁ + R5 ₂₂ ) / (R5 ₂₁ -R5 ₂₂ ) | <55mm (67)

10mm <| AAG5 × (R5 ₂₁ + R5 ₂₂ ) / (R5 ₂₁ -R5 ₂₂ ) | <20mm (68)

16 <| F5 × (R5 ₂₁ + R5 ₂₂ ) / (R5 ₂₁ -R5 ₂₂ ) | <25 (69)

0mm <| f5 ₂₃₄ | <50mm (70)

1.2 <f5 / D5 ₁ <2.5 (71)

-35mm <(f5 ₁ × f5 ₆ ) / (T5 ₁ + T5 ₂ + T5 ₆ ) <-6mm (72)

1.3mm <(f5 ₁ -f5 ₆ ) / ((T5 ₅ + T5 ₆ ) / G5 ₅ ) <5mm (73)

10mm <(R5 ₁₁ + R5 ₁₂ + R5 ₅₂ + R5 ₆₂ ) × ((T5 ₅ + T5 ₆ ) / G5 ₅ ) <29mm (74)

-3.5 <(R5 ₁₁ + R5 ₁₂ ) / (R5 ₅₂ -R5 ₆₂ ) <-1 (75)

0.5 <TTL5 / (R5 ₆₂ -R5 ₅₂ ) <1. (76)

-3.5 <(f5 ₁ + f5 ₅ + f5 ₆ ) / (T5 ₅ + T5 ₆ -R5 ₆₂ + R5 ₅₂ ) <-1. (77)

-5 <(f5 ₁ -f5 ₆ ) / (T5 ₅ + T5 ₆ -R5 ₆₂ + R5 ₅₂ ) <-1 (78)

-10 <F5 × ((f5 ₁ -f5 ₆ ) / (T5 ₅ + T5 ₆ -R5 ₆₂ + R5 ₅₂ )) <-3 (79)

The above f5 ₁ , f5 ₅ , f5 ₆ , f5 ₂₃₄ , f5, R5 ₁₁ , R5 ₁₂ , R5 ₂₁ , R5 ₂₂ , R5 ₅₂ , R5 ₆₂ , D5 ₁ , AAG5, F5, T5 ₁ , T5 ₂ , T5 ₅ , T5 ₆ , G5 ₅ and TTL5 are defined as f1 ₁ , f1 ₅ , f1 ₆ , f1 ₂₃₄ , f1, R1 ₁₁ , R1 ₁₂ , R1 ₂₁ , R1 ₂₂ , R1 ₅₂ , R1 ₆₂ , D1 ₁ , AAG1 The definitions of, F1, T1 ₁ , T1 ₂ , T1 ₅ , T1 ₆ , G1 ₅ and TTL1 are the same, and will not be repeated here.

Utilizing the above lens, aperture ST5 and a design that satisfies any of the conditions (65) to (79), the imaging lens 5 can effectively shorten the total length of the lens, effectively reduce the aperture value, effectively reduce the weight of the lens, and effectively Improved resolution, effective correction of chromatic aberration, effective correction of aberration.

Table 13 is the related parameter table of each lens of imaging lens 5 in Figure 9. The data in Table 13 shows that the effective focal length of imaging lens 5 of the fifth embodiment is equal to 4.23 mm, the aperture value is equal to 1.65, and the total lens length is equal to 4.99 The angle of view is 82.8 degrees.

The aspheric surface depression z of each lens in Table 13 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 ¹² + Eh ¹⁴ + Fh ¹⁶ + Gh ¹⁸ + Hh ³ + Ih ⁵ + Jh ⁷

Where: c: curvature; h: vertical distance from any point on the lens surface to the optical axis; k: conic coefficient; A ~ J: aspheric coefficient.

Table 14 is a table of related parameters of the aspheric surface of each lens in Table 13, where k is the Conic Constant and A ~ J are the aspheric coefficients.

Table 15 shows the parameter values in the conditions (65) to (79) and the calculated values of the conditions (65) to (79). As can be seen from Table 15, the imaging lens 5 of the fifth embodiment satisfies the condition (65 ) To the requirements of Condition (79).

In addition, the optical performance of the imaging lens 5 of the fifth embodiment can also meet requirements, which can be seen from FIGS. 10A to 10C. FIG. 10A is a Field Curvature diagram of the imaging lens 5 of the fifth embodiment. FIG. 10B is a distortion diagram of the imaging lens 5 of the fifth embodiment. FIG. 10C is a diagram showing a Modulation Transfer Function of the imaging lens 5 of the fifth embodiment.

It can be seen from FIG. 10A that the imaging lens 5 of the fifth embodiment has a pair of rays with a wavelength of 0.470 μm, 0.510 μm, 0.555 μm, 0.610 μm, and 0.650 μm in the direction of the Tangential and Sagittal directions The field curvature is between -0.2mm and 0..2mm.

From Figure 10B (the five lines in the figure are almost superimposed so that only one line appears), it can be seen that the imaging lens 5 of the fifth embodiment has a wavelength of 0.470 μm, 0.510 μm, 0.555 μm, 0.610 μm, 0.650 μm The distortion caused by the light is between 0.0% and 2.0%.

It can be seen from FIG. 10C that the imaging lens 5 of the fifth embodiment has a pair of rays with a wavelength range of 0.4700 μm to 0.6500 μm, respectively in the Tangential direction and the Sagittal direction, and the field heights are 0.000. mm, 0.3528mm, 0.7056mm, 1.4112mm, 1.7640mm, 2.4696mm, 2.8224mm, 3.5280mm, 3.7280mm, the spatial frequency is between 0lp / mm and 357lp / mm, and its modulation conversion function value is between 0.05 and 1.0 between.

It is obvious that the field curvature and distortion of the imaging lens 5 of the fifth embodiment can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 11, which is a sixth embodiment of the imaging lens according to the present invention The lens configuration diagram of the embodiment. The imaging lens 6 includes an aperture ST6, a first lens L61, a second lens L62, a third lens L63, a fourth lens L64, and a first lens, in order from an object side to an image side along an optical axis OA6. Five lenses L65, a sixth lens L66, and a filter OF6. During imaging, the light from the object side is finally imaged on an imaging surface IMA6.

The first lens L61 is a meniscus lens with positive refractive power. The object side surface S62 is convex, the image side S63 is concave, and both the object side S62 and the image side S63 are aspherical surfaces.

The second lens L62 is a meniscus lens with positive refractive power. The object side S64 is concave, the image side S65 is convex, and both the object side S64 and the image side S65 are aspherical surfaces.

The third lens L63 is a meniscus lens with negative refractive power. The object side S66 is concave, the image side S67 is convex, and both the object side S66 and the image side S67 are aspherical surfaces.

The fourth lens L64 is a meniscus lens with positive refractive power. The object side S68 is concave, the image side S69 is convex, and both the object side S68 and the image side S69 are aspherical surfaces.

The fifth lens L65 is a meniscus lens with positive refractive power. The object side S610 is concave, the image side S611 is convex, and the object side S610 and the image side S611 are aspherical surfaces.

The sixth lens L66 is a meniscus lens with negative refractive power. The object side S612 is convex, the image side S613 is concave, and the object side S612 and the image side S613 are aspherical surfaces.

The optical filter OF6 has a flat object side S614 and an image side S615.

In addition, the imaging lens 6 in the sixth embodiment satisfies any one of the following twelve conditions: 3 <D6 ₁ / T6 ₆ <9 (80)

-20mm <f6 × ((f6 ₁ -f6 ₆ ) / (T6 ₅ + T6 ₆ -R6 ₆₂ + R6 ₅₂ )) <-5mm (81)

0mm <| f6 ₂₃₄ | <50mm (82)

1.2 <f6 / D6 ₁ <2.5 (83)

-35mm <(f6 ₁ × f6 ₆ ) / (T6 ₁ + T6 ₂ + T6 ₆ ) <-6mm (84)

1.3mm <(f6 ₁ -f6 ₆ ) / ((T6 ₅ + T6 ₆ ) / G6 ₅ ) <5mm (85)

10mm <(R6 ₁₁ + R6 ₁₂ + R6 ₅₂ + R6 ₆₂ ) × ((T6 ₅ + T6 ₆ ) / G6 ₅ ) <29mm (86)

-3.5 <(R6 ₁₁ + R6 ₁₂ ) / (R6 ₅₂ -R6 ₆₂ ) <-1 (87)

0.5 <TTL6 / (R6 ₆₂ -R6 ₅₂ ) <1. (88)

-3.5 <(f6 ₁ + f6 ₅ + f6 ₆ ) / (T6 ₅ + T6 ₆ -R6 ₆₂ + R6 ₅₂ ) <-1. (89)

-5 <(f6 ₁ -f6 ₆ ) / (T6 ₅ + T6 ₆ -R6 ₆₂ + R6 ₅₂ ) <-1 (90)

-10 <F6 × ((f6 ₁ -f6 ₆ ) / (T6 ₅ + T6 ₆ -R6 ₆₂ + R6 ₅₂ )) <-3 (91)

The above definitions of f6 ₁ , f6 ₅ , f6 ₆ , f6 ₂₃₄ , f6, R6 ₁₁ , R6 ₁₂ , R6 ₅₂ , R6 ₆₂ , D6 ₁ , F6, T6 ₁ , T6 ₂ , T6 ₅ , T6 ₆ , G6 ₅ and TTL6 Same as f1 ₁ , f1 ₅ , f1 ₆ , f1 ₂₃₄ , f1, R1 ₁₁ , R1 ₁₂ , R1 ₅₂ , R1 ₆₂ , D1 ₁ , F1, T1 ₁ , T1 ₂ , T1 ₅ , T1 ₆ , G1 The definitions of ₅ and TTL1 are the same and will not be repeated here.

Utilizing the above lens, aperture ST6 and a design that satisfies any of the conditions (80) to (91), the imaging lens 6 can effectively shorten the total lens length, effectively reduce the aperture value, effectively reduce the weight of the lens, and effectively Improved resolution, effective correction of chromatic aberration, effective correction of aberration.

Table 16 is a table of related parameters of each lens of the imaging lens 6 in FIG. 11. The data in Table 16 shows that the effective focal length of the imaging lens 6 of the sixth embodiment is equal to 4.17 mm, the light The circle value is equal to 2.0, the total lens length is equal to 4.98mm, and the viewing angle is equal to 83.6 degrees.

The aspheric surface depression z of each lens in Table 16 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 ¹² + Eh ¹⁴ + Fh ¹⁶ + Gh ¹⁸

Where: c: curvature; h: vertical distance from any point on the lens surface to the optical axis; k: conic coefficient; A ~ G: aspheric coefficient.

Table 17 is a table of related parameters of the aspheric surface of each lens in Table 16, where k is Conic Constant and A ~ G are aspheric coefficients.

Table 18 shows the parameter values in conditions (80) to (91) and the calculated values of conditions (80) to (91). As can be seen from Table 18, the imaging lens 6 of the sixth embodiment all satisfies the condition (80 ) To the requirements of condition (91).

In addition, the optical performance of the imaging lens 6 of the sixth embodiment can also meet the requirements, which can be seen from FIGS. 12A to 12C. Figure 12A shows the imaging mirror of the sixth embodiment. Field Curvature diagram for the first 6 FIG. 12B is a distortion diagram of the imaging lens 6 of the sixth embodiment. FIG. 12C shows a Modulation Transfer Function chart of the imaging lens 6 of the sixth embodiment.

It can be seen from FIG. 12A that the imaging lens 6 of the sixth embodiment has a pair of rays with a wavelength of 0.436 μm, 0.486 μm, 0.546 μm, 0.588 μm, and 0.656 μm in the direction of the tangential direction and the direction of the sagittal direction. The field curvature is between -0.2mm and 0.2mm.

It can be seen from FIG. 12B that the distortion caused by the imaging lens 6 of the sixth embodiment for light having a wavelength of 0.436 μm, 0.486 μm, 0.546 μm, 0.588 μm, and 0.656 μm is between -0.5% and 2.0%.

It can be seen from FIG. 12C that the imaging lens 6 of the sixth embodiment has a pair of rays with a wavelength ranging from 0.4358 μm to 0.6563 μm, respectively in the Tangential direction and the Sagittal direction, and the field heights are 0.000 respectively. mm, 0.3528mm, 0.7056mm, 1.4112mm, 1.7640mm, 2.4696mm, 2.8224mm, 3.5280mm, 3.7280mm, the spatial frequency is between 0lp / mm and 357lp / mm, and its modulation conversion function value is between 0.0 and 1.0 between.

It is obvious that the field curvature and distortion of the imaging lens 6 of the sixth embodiment can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Please refer to Table 19 and Table 20. Table 19 is a table of related parameters of each lens of the seventh embodiment of the imaging lens according to the present invention, and Table 20 is a table of related parameters of the aspheric surface of each lens in Table 19.

The lens configuration diagram of the seventh embodiment of the imaging lens described above is similar to the lens configuration diagram of the fifth embodiment of the imaging lens, so the legend is omitted.

Table 19 shows the effective focal length of the imaging lens 7 of the seventh embodiment. It is equal to 4.236mm, the aperture value is equal to 1.65, the total lens length is equal to 4.99mm, and the viewing angle is equal to 78.3 degrees.

The aspheric surface depression z of each lens in Table 19 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 ¹² + Eh ¹⁴ + Fh ¹⁶ + Gh ¹⁸ + Hh ³ + Ih ⁵ + Jh ⁷ + Kh ⁹

Where: c: curvature; h: vertical distance from any point on the lens surface to the optical axis; k: conic coefficient; A ~ K: aspheric coefficient.

Table 20 is a table of related parameters of the aspheric surface of each lens in Table 19, where k is the Conic Constant and A ~ K are aspheric coefficients.

In addition, the imaging lens 7 in the seventh embodiment satisfies any one of the following fifteen conditions: 3 <D7 ₁ / T7 ₆ <9 (92)

-20mm <f7 × ((f7 ₁ -f7 ₆ ) / (T7 ₅ + T7 ₆ -R7 ₆₂ + R7 ₅₂ )) <-5mm (93)

37mm <| f7 × (R7 ₂₁ + R7 ₂₂ ) / (R7 ₂₁ -R7 ₂₂ ) | <55mm (94)

10mm <| AAG7 × (R7 ₂₁ + R7 ₂₂ ) / (R7 ₂₁ -R7 ₂₂ ) | <20mm (95)

16 <| F7 × (R7 ₂₁ + R7 ₂₂ ) / (R7 ₂₁ -R7 ₂₂ ) | <25 (96)

0mm <| f7 ₂₃₄ | <50mm (97)

1.2 <f7 / D7 ₁ <2. (98)

-35mm <(f7 ₁ × f7 ₆ ) / (T7 ₁ + T7 ₂ + T7 ₆ ) <-6mm (99)

1.3mm <(f7 ₁ -f7 ₆ ) / ((T7 ₅ + T7 ₆ ) / G7 ₅ ) <5mm (100)

10mm <(R7 ₁₁ + R7 ₁₂ + R7 ₅₂ + R7 ₆₂ ) × ((T7 ₅ + T7 ₆ ) / G7 ₅ ) <29mm (101)

-3.5 <(R7 ₁₁ + R7 ₁₂ ) / (R7 ₅₂ -R7 ₆₂ ) <-1 (102)

0.5 <TTL7 / (R7 ₆₂ -R7 ₅₂ ) <1. (103)

-3.5 <(f7 ₁ + f7 ₅ + f7 ₆ ) / (T7 ₅ + T7 ₆ -R7 ₆₂ + R7 ₅₂ ) <-1. (104)

-5 <(f7 ₁ -f7 ₆ ) / (T7 ₅ + T7 ₆ -R7 ₆₂ + R7 ₅₂ ) <-1 (105)

-10 <F7 × ((f7 ₁ -f7 ₆ ) / (T7 ₅ + T7 ₆ -R7 ₆₂ + R7 ₅₂ )) <-3 (106)

F7 ₁ , f7 ₅ , f7 ₆ , f7 ₂₃₄ , f7, R7 ₁₁ , R7 ₁₂ , R7 ₂₁ , R7 ₂₂ , R7 ₅₂ , R7 ₆₂ , D7 ₁ , AAG7, F7, T7 ₁ , T7 ₂ , T7 ₅ , T7 ₆ , G7 ₅ and TTL7 are defined as f1 ₁ , f1 ₅ , f1 ₆ , f1 ₂₃₄ , f1, R1 ₁₁ , R1 ₁₂ , R1 ₂₁ , R1 ₂₂ , R1 ₅₂ , R1 ₆₂ , D1 ₁ , AAG1 The definitions of, F1, T1 ₁ , T1 ₂ , T1 ₅ , T1 ₆ , G1 ₅ and TTL1 are the same, and will not be repeated here.

Utilizing the above lens, aperture ST7 and a design that satisfies any one of the conditions (92) to (106), the imaging lens 7 can effectively shorten the total length of the lens, effectively reduce the aperture value, effectively reduce the weight of the lens, and effectively Improved resolution, effective correction of chromatic aberration, effective correction of aberration.

Table 21 shows the values of the parameters in conditions (92) to (106) and the calculated values of conditions (92) to (106). As can be seen from Table 21, the imaging lens 7 of the seventh embodiment all meets the conditions. Requirements (92) to conditions (106).

The field curvature (omitting the legend) and distortion (omitting the legend) of the imaging lens of the aforementioned seventh embodiment can also be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Please refer to Table 22 and Table 23. Table 22 is a table of related parameters of each lens of the eighth embodiment of the imaging lens according to the present invention, and Table 23 is a table of related parameters of the aspheric surface of each lens in Table 22.

The refractive power of each lens in the eighth embodiment of the imaging lens is the same as the refractive power of each lens in the first embodiment of the imaging lens, and its illustration is omitted here. In the eighth embodiment, the image side of the third lens is convex, and the object side of the sixth lens is concave, but in the first embodiment, the image side of the third lens is concave, and the object side of the sixth lens is convex .

Table 22 shows that the effective focal length of the imaging lens 8 of the eighth embodiment is 4.234 mm, the aperture value is 1.65, the total lens length is 5.03 mm, and the viewing angle is 78.2 degrees.

The aspheric surface depression z of each lens in Table 22 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 ¹² + Eh ¹⁴ + Fh ¹⁶ + Gh ¹⁸ + Hh ³ + Ih ⁵

Where: c: curvature; h: vertical distance from any point on the lens surface to the optical axis; k: conic coefficient; A ~ I: aspheric coefficient.

Table 23 is a table of related parameters of the aspheric surface of each lens in Table 22, where k is the Conic Constant and A ~ I are aspheric coefficients.

In addition, the imaging lens 8 in the eighth embodiment satisfies any one of the following twelve conditions: 3 <D8 ₁ / T8 ₆ <9 (107)

-20mm <18 × ((f8 ₁ -f8 ₆ ) / (T8 ₅ + T8 ₆ -R8 ₆₂ + R8 ₅₂ )) <-5mm (108)

0mm <| f8 ₂₃₄ | <50mm (109)

1.2 <f8 / D8 ₁ <2.5 (110)

-35mm <(f8 ₁ × f8 ₆ ) / (T8 ₁ + T8 ₂ + T8 ₆ ) <-6mm (111)

1.3mm <(f8 ₁ -f8 ₆ ) / ((T8 ₅ + T8 ₆ ) / G8 ₅ ) <5mm (112)

10mm <(R8 ₁₁ + R8 ₁₂ + R8 ₅₂ + R8 ₆₂ ) × ((T8 ₅ + T8 ₆ ) / G8 ₅ ) <29mm (113)

-3.5 <(R8 ₁₁ + R8 ₁₂ ) / (R8 ₅₂ -R8 ₆₂ ) <-1 (114)

0.5 <TTL8 / (R8 ₆₂ -R8 ₅₂ ) <1. (115)

-3.5 <(f8 ₁ + f8 ₅ + f8 ₆ ) / (T8 ₅ + T8 ₆ -R8 ₆₂ + R8 ₅₂ ) <-1. (116)

-5 <(f8 ₁ -f8 ₆ ) / (T8 ₅ + T8 ₆ -R8 ₆₂ + R8 ₅₂ ) <-1 (117)

-10 <F8 × ((f8 ₁ -f8 ₆ ) / (T8 ₅ + T8 ₆ -R8 ₆₂ + R8 ₅₂ )) <-3 (118)

The above definitions of f8 ₁ , f8 ₅ , f8 ₆ , f8 ₂₃₄ , f8, R8 ₁₁ , R8 ₁₂ , R8 ₅₂ , R8 ₆₂ , D8 ₁ , F8, T8 ₁ , T8 ₂ , T8 ₅ , T8 ₆ , G8 ₅ and TTL8 Same as f1 ₁ , f1 ₅ , f1 ₆ , f1 ₂₃₄ , f1, R1 ₁₁ , R1 ₁₂ , R1 ₅₂ , R1 ₆₂ , D1 ₁ , F1, T1 ₁ , T1 ₂ , T1 ₅ , T1 ₆ , G1 The definitions of ₅ and TTL1 are the same and will not be repeated here.

Utilizing the above lens, aperture ST8, and designs that meet any of the conditions (107) to (118), the imaging lens 8 can effectively shorten the total lens length, effectively reduce the aperture value, effectively reduce the weight of the lens, and effectively Improved resolution, effective correction of chromatic aberration, effective correction of aberration.

Table 24 shows the parameter values in the conditions (107) to (118) and the calculated values of the conditions (107) to (118). As can be seen from Table 24, the imaging lens 8 of the eighth embodiment meets the conditions. (107) to condition (118).

The field curvature (omitting the legend) and distortion (omitting the legend) of the imaging lens of the above eighth embodiment can also be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various modifications and retouches without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be determined by the scope of the attached patent application.

Claims (17)

An imaging lens basically consists of an aperture, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; the first lens is a meniscus lens The first lens has a positive refractive power, and the first lens includes a convex surface facing an object side and a concave surface facing an image side; the second lens has a refractive power; the third lens has a refractive power; the fourth lens has a refractive power; and the fifth lens has a positive power The fifth lens includes a convex surface facing the image side; the sixth lens has a negative refractive power; the sixth lens includes a concave surface facing the image side; wherein the aperture, the first lens, the second lens, the first lens The three lenses, the fourth lens, the fifth lens, and the sixth lens are sequentially arranged along the optical axis from the object side to the image side; the imaging lens satisfies the following conditions: 3 <D ₁ / T ₆ <9 ; Wherein D ₁ is an optical effective diameter of an object side of the first lens, and T ₆ is a thickness of the sixth lens on the optical axis. An imaging lens basically consists of an aperture, a first lens, a second lens, a third lens, a fourth lens, a seventh lens, a fifth lens, and a sixth lens; the first lens The meniscus lens has positive refractive power, the first lens includes a convex surface facing an object side and a concave surface facing an image side; the second lens has refractive power; the third lens has refractive power; the fourth lens has refractive power; The seventh lens has a negative refractive power; the fifth lens has a positive refractive power, the fifth lens includes a convex surface toward the image side; the sixth lens has a negative refractive power, and the sixth lens includes a concave surface toward the image side; A lens, the second lens, the third lens, the fourth lens, the seventh lens, the fifth lens, and the sixth lens are sequentially arranged along the optical axis from the object side to the image side; the The aperture is set between the object side and the second lens; the imaging lens meets the following conditions: 1.2 <f / D ₁ <2.5; where f is one of the effective focal lengths of the imaging lens and D _{1 is the one of} the first lens One side of a thing Learn effective diameter. The imaging lens according to item 2 of the scope of patent application, wherein the fourth lens includes a convex surface facing the object side, the fifth lens further includes a concave surface toward the object side, and the sixth lens further includes a convex surface toward the object. side. The imaging lens according to any one of claims 1 to 2 of the scope of patent application, further comprising a filter disposed between the sixth lens and the image side, wherein: the second lens is curved A moon lens, the second lens includes a convex surface facing the object side and a concave surface toward the image side; the third lens has a positive refractive power, and the third lens includes a convex surface facing the object side. The imaging lens according to item 4 of the scope of patent application, wherein the second lens has negative refractive power. The imaging lens according to item 4 of the scope of patent application, wherein the imaging lens satisfies the following conditions: 37mm <| f × (R ₂₁ + R ₂₂ ) / (R ₂₁ -R ₂₂ ) | <55mm; where f is the An effective focal length of an imaging lens, R _{21 is a} radius of curvature of an object side of the second lens, and R _{22 is a} radius of curvature of an image side of the second lens. The imaging lens described in item 4 of the scope of patent application, wherein the imaging lens satisfies the following conditions: 10mm <| AAG × (R ₂₁ + R ₂₂ ) / (R ₂₁ -R ₂₂ ) | <20mm; where AAG is the The total air distance from one image side of the first lens to one object side of the lens closest to the image side on the optical axis, R _{21 is a} radius of curvature of one object side of the second lens, R ₂₂ A curvature radius of one image side of the second lens. The imaging lens according to item 4 of the scope of patent application, wherein the imaging lens satisfies the following conditions: 16 <| F × (R ₂₁ + R ₂₂ ) / (R ₂₁ -R ₂₂ ) | <25; where F is the An aperture value (F-number) of an imaging lens, R _{21 is a} radius of curvature of an object side of the second lens, and R _{22 is a} radius of curvature of an image side of the second lens. The imaging lens according to item 4 of the scope of patent application, wherein the imaging lens satisfies the following conditions: -1.8mm <(R ₅₂ + R ₆₂ ) × (R ₃₁ / f ₁ ) <0mm; where R _{31 is} the first One curvature radius of one object side of three lenses, R _{52 is} one curvature radius of one image side of the fifth lens, R _{62 is} one curvature radius of one image side of the sixth lens, and f _{1 is} the first lens. One effective focal length. The imaging lens according to any one of claims 1 to 2 in the scope of patent application, wherein the imaging lens satisfies the following conditions: 0mm <| f ₂₃₄ | <50mm; -20mm <f × ((f ₁ -f ₆ ) / (T ₅ + T ₆ -R ₆₂ + R ₅₂ )) <-5mm; where f is an effective focal length of the imaging lens, f _{1 is} an effective focal length of the first lens, and f _{6 is} the first An effective focal length of one of the six lenses, T ₅ is a thickness of the fifth lens on the optical axis, T _{6 is a} thickness of the sixth lens on the optical axis, and R _{52 is an} image side of the fifth lens A curvature radius, R _{62 is a} curvature radius of an image side of the sixth lens, and f _{234 is} an effective focal length of the combination of the second lens, the third lens, and the fourth lens. The imaging lens according to any one of claims 1 to 2 in the scope of patent application, wherein the imaging lens satisfies the following conditions: -35mm <(f ₁ × f ₆ ) / (T ₁ + T ₂ + T ₆ ) <-6mm; where f _{1 is} an effective focal length of the first lens, f _{6 is} an effective focal length of the sixth lens, T ₁ is a thickness of the first lens on the optical axis, and T ₂ is A thickness of the second lens on the optical axis, and T _{6 is a} thickness of the sixth lens on the optical axis. The imaging lens according to item 11 of the scope of patent application, wherein the imaging lens satisfies the following conditions: 1.3mm <(f ₁ -f ₆ ) / ((T ₅ + T ₆ ) / G ₅ ) <5mm; wherein, f _{1 is} an effective focal length of the first lens, f _{6 is} an effective focal length of the sixth lens, T ₅ is a thickness of the fifth lens on the optical axis, and T _{6 is} the sixth lens on the optical axis. G ₅ is an air gap between one image side of the fifth lens and one object side of the sixth lens on the optical axis. The imaging lens according to item 12 of the scope of patent application, wherein the imaging lens satisfies the following conditions: 10mm <(R ₁₁ + R ₁₂ + R ₅₂ + R ₆₂ ) × ((T ₅ + T ₆ ) / G ₅ ) <29mm; wherein R ₁₁ is a curvature radius of an object side of the first lens, R _{12 is a} curvature radius of an image side of the first lens, and R _{52 is a} curvature of an image side of the fifth lens Radius, R _{62 is a} radius of curvature of one image side of the sixth lens, T ₅ is a thickness of the fifth lens on the optical axis, and T _{6 is a} thickness of the sixth lens on the optical axis, G ₅ is an air gap on the optical axis from one image side of the fifth lens to one object side of the sixth lens. The imaging lens according to item 13 of the scope of patent application, wherein the imaging lens satisfies the following conditions: -3.5 <(R ₁₁ + R ₁₂ ) / (R ₅₂ -R ₆₂ ) <-1; wherein R _{11 is} the first A curvature radius of an object side of a lens, R _{12 is a} curvature radius of an image side of the first lens, R _{52 is a} curvature radius of an image side of the fifth lens, and R _{62 is} the sixth lens One looks like a radius of curvature on one side. The imaging lens described in any one of claims 1 to 2 of the scope of patent application, wherein the imaging lens satisfies the following conditions: 0.5 <TTL / (R ₆₂ -R ₅₂ ) <1.9; where TTL is the first A distance from an object side of an lens to an imaging plane on the optical axis, R _{52 is a} curvature radius of an image side of the fifth lens, and R _{62 is a} curvature radius of an image side of the sixth lens . The imaging lens according to item 15 of the scope of patent application, wherein the imaging lens satisfies the following conditions: -3.5 <(f ₁ + f ₅ + f ₆ ) / (T ₅ + T ₆ -R ₆₂ + R ₅₂ ) <- 1.5; where f _{1 is} an effective focal length of the first lens, f _{5 is} an effective focal length of the fifth lens, f _{6 is} an effective focal length of the sixth lens, and T _{5 is} the fifth lens in the light A thickness on the axis, T ₆ is a thickness of the sixth lens on the optical axis, R _{52 is a} radius of curvature of an image side of the fifth lens, and R _{62 is a} radius of one image of the sixth lens. A radius of curvature. The imaging lens according to any one of claims 1 to 2 of the scope of patent application, wherein the imaging lens satisfies the following conditions: -5 <(f ₁ -f ₆ ) / (T ₅ + T ₆ -R ₆₂ + R ₅₂ ) <-1; -10 <F × ((f ₁ -f ₆ ) / (T ₅ + T ₆ -R ₆₂ + R ₅₂ )) <-3; where F is one aperture of the imaging lens Value (F-number), f _{1 is} an effective focal length of the first lens, f _{6 is} an effective focal length of the sixth lens, T ₅ is a thickness of the fifth lens on the optical axis, and T ₆ is A thickness of the sixth lens on the optical axis, R _{52 is a} radius of curvature of one image side of the fifth lens, and R _{62 is a} radius of curvature of one image side of the sixth lens.