TWI610091B - Six-piece wide-angle lens module - Google Patents

Abstract

A six-piece wide-angle lens includes a first lens and a second mirror sequentially from the object side to the image side A sheet, a third lens, an aperture, a fourth lens, a fifth lens and a sixth lens. The first lens has a negative refractive power and the image side is a concave surface. The second lens has a negative refractive power and the image side is concave. The object side of the third lens is convex and the image side is concave. The fourth lens has a positive refractive power, and both the object side and the image side surface are convex. The fifth lens has a positive refractive power, and both the object side and the image side surface are convex. The sixth lens has a negative refractive power, and the object side surface is concave and the image side surface is convex. Thereby, the lens is easy to achieve wide-angle and high-brightness effects.

Description

Six-piece wide-angle lens

The present invention relates to an optical system, and more particularly to a six-piece lens having miniaturization and wide-angle characteristics.

A wide-angle lens is a lens with a short focal length and a large viewing angle. It is characterized by a long depth of field, a wide range of scenery, and an increase in the spatial depth of the picture.

However, a general wide-angle lens is prone to a problem of large chromatic aberration. In order to improve the problem of large chromatic aberration, the applicant tried to improve the wide-angle lens and made it have a higher brightness.

In view of this, the main object of the present invention is to provide a six-piece lens with less chromatic aberration and high brightness performance.

In order to achieve the above and other objects, the present invention provides a six-piece wide-angle lens including a first lens, a second lens, a third lens, an aperture, a fourth lens, and a first from the object side to the image side. Five lenses and a sixth lens. The first lens has a negative refractive power with a radius of curvature of the side of the object that is greater than a radius of curvature of the side of the image. The second lens has a negative refractive power with a radius of curvature of the side of the object that is greater than a radius of curvature of the side of the image. The radius of curvature of the object side surface of the third lens is larger than the radius of curvature of the image side surface, and the radius of curvature of the side surface of the third lens object is a positive value. The fourth lens has a positive refractive power with a radius of curvature of the side of the object that is greater than a radius of curvature of the side of the image. The fifth lens has a positive refractive power, the radius of curvature of the object side surface is larger than the radius of curvature of the image side surface, and the radius of curvature of the side surface of the fifth lens object is a positive value. The sixth lens has a negative refractive power and its side curvature The radius is larger than the radius of curvature of the image side surface, and the radius of curvature of the side surface of the sixth lens object is a negative value.

In order to achieve the above and other objects, the present invention further provides a six-piece wide-angle lens, which includes a first lens, a second lens, a third lens, an aperture, a fourth lens, and a second from the object side to the image side. a fifth lens and a sixth lens. The first lens has a negative refractive power with a radius of curvature of the side of the object that is greater than a radius of curvature of the side of the image. The second lens has a negative refractive power, and the radius of curvature of the object side surface is smaller than the radius of curvature of the image side surface. The curvature radius of the object side surface of the third lens is larger than the curvature radius of the image side surface, and the radius of curvature of the side surface of the third lens image is a positive value. The fourth lens has a positive refractive power with a radius of curvature of the side of the object that is greater than a radius of curvature of the side of the image. The fifth lens has a positive refractive power, the radius of curvature of the object side surface is larger than the radius of curvature of the image side surface, and the radius of curvature of the side surface of the fifth lens object is a positive value. The sixth lens has a negative refractive power, the radius of curvature of the object side surface is larger than the radius of curvature of the side surface of the image, and the radius of curvature of the side surface of the sixth lens object is a negative value.

In order to achieve the above and other objects, the present invention further provides a six-piece wide-angle lens, which includes a first lens, a second lens, a third lens, an aperture, a fourth lens, and a second from the object side to the image side. a fifth lens and a sixth lens. The first lens has a negative refractive power and the image side is a concave surface. The second lens has a negative refractive power and the image side is concave. The object side of the third lens is convex and the image side is concave. The fourth lens has a positive refractive power, and both the object side and the image side surface are convex. The fifth lens has a positive refractive power, and both the object side and the image side surface are convex. The sixth lens has a negative refractive power, and the object side surface is concave and the image side surface is convex.

The aforementioned six-piece wide-angle lens can also satisfy the following relationship: -0.038<f/f3<-0.015; where f is the system focal length value of the six-piece wide-angle lens, and f3 is the focal length value of the third lens, whereby the first three lenses are compared Easy to manufacture and assemble, and help to improve the brightness, and take into account the correction of chromatic aberration performance.

The aforementioned six-piece wide-angle lens can also satisfy the following relationship: -1.75<f456/f123<-1.3; where f456 is the composite focal length value of the fourth to sixth lenses, and f123 is the composite focal length value of the first to third lenses, thereby enabling the system to balance the wide-angle effect with the corrected aberration performance .

The foregoing six-piece wide-angle lens can also satisfy the following relationship: 25<r1/r2<33; wherein r1 is the radius of curvature of the side of the first lens object, and r2 is the radius of curvature of the side of the first lens image, thereby making the system higher Brightness, and take into account the modified distortion performance.

The aforementioned six-piece wide-angle lens can also satisfy the following relationship: 0.47<f/f4<0.6; where f is the system focal length value of the six-piece wide-angle lens, and f4 is the focal length value of the fourth lens, thereby enabling the system to realize Miniaturization, and take into account the performance of the correction field.

The aforementioned six-piece wide-angle lens can also satisfy the following relationship: vd5-vd6>35; wherein vd5 is the dispersion coefficient of the fifth lens, and vd6 is the dispersion coefficient of the sixth lens, thereby having better chromatic aberration performance.

The aforementioned six-piece wide-angle lens can also satisfy the following relationship: 0.44<ct1/ct2<0.63; wherein ct1 is the thickness at the optical axis of the first lens, and ct2 is the thickness at the optical axis of the second lens, thereby making the system have a wide-angle effect. , manufacturing sensitivity is better and easy to make.

The aforementioned six-piece wide-angle lens can also satisfy the following relationship: 34.8<f/r1<40.4; 1.2<f/r2<1.36; 6.5<| f/r3 |<110;1.29<f/r4<3;1.6<f/ R5<3.42; 1.4<f/r6<2.8; 1.5<f/r7<2.7;-2<f/r8<-1.7;2.7<f/r9<4.2;-1.3<f/r10<-1.1;-1.3<f/r11<-1.1;-3.8<f /r12<-2.7;0.1<f/TTL<0.15; where f is the system focal length value of the six-piece wide-angle lens, r1 is the radius of curvature of the side of the first lens object, and r2 is the radius of curvature of the side of the first lens image R3 is the radius of curvature of the side surface of the second lens object, r4 is the radius of curvature of the side surface of the second lens image, r5 is the radius of curvature of the side surface of the third lens object, and r6 is the radius of curvature of the side surface of the third lens image, r7 Is the radius of curvature of the side surface of the fourth lens object, r8 is the radius of curvature of the side surface of the fourth lens image, r9 is the radius of curvature of the side surface of the fifth lens object, r10 is the radius of curvature of the side surface of the fifth lens image, r11 is the radius The radius of curvature of the side surface of the sixth lens object, r12 is the radius of curvature of the side surface of the sixth lens image, and the TTL is the full length of the system of the six-piece wide-angle lens, so that the six-piece wide-angle lens has better imaging effect and miniaturization.

In the above-described six-piece wide-angle lens, at least one of the second to fourth lenses has at least one aspherical surface.

Since the first two lenses have a negative refractive power, and the three lenses in front of the aperture also have a negative refractive power as a whole, it is easy to achieve a wide-angle and high-brightness effect, and can average the manufacturing sensitivity of the lens. In addition, the combination of three lenses behind the aperture helps to reduce the degree of chromatic aberration. Therefore, as a whole, the six-piece wide-angle lens of the present invention can combine the effects of wide angle, high brightness, and low chromatic aberration.

10‧‧‧ first lens

20‧‧‧second lens

30‧‧‧ third lens

40‧‧‧Fourth lens

50‧‧‧ fifth lens

60‧‧‧ sixth lens

70‧‧‧ flat lenses

L‧‧‧ optical axis

A‧‧‧ object side

B‧‧‧ image side

ST‧‧‧ aperture

Figure 1 is a schematic view of a first embodiment of the present invention.

Fig. 1A is a lateral chromatic aberration diagram of the first embodiment of the present invention.

Fig. 1B is a phase contrast diagram of the first embodiment of the present invention.

Figure 2 is a schematic view of a second embodiment of the present invention.

Fig. 2A is a lateral chromatic aberration diagram of the second embodiment of the present invention.

Fig. 2B is a phase contrast diagram of the second embodiment of the present invention.

Figure 3 is a schematic view of a third embodiment of the present invention.

Fig. 3A is a lateral chromatic aberration diagram of the third embodiment of the present invention.

Fig. 3B is a phase contrast diagram of the third embodiment of the present invention.

Please refer to FIG. 1 , which is a first embodiment of the present invention. The six-piece wide-angle lens (hereinafter referred to as a six-piece lens) sequentially includes an object from the object side A to the image side B on the optical axis L. a lens 10, a second lens 20, a third lens 30, a diaphragm ST, a fourth lens 40, a fifth lens 50 and a sixth lens 60 are provided with CCD, CMOS or other at the image side B. The photosensitive element (not shown) may be provided with a flat lens 70 such as a filter and/or a protective glass between the photosensitive element and the sixth lens 60. The number of the flat lenses 70 may be increased or decreased or not set as required.

In this embodiment, the first lens 10 has a negative refractive power, the object side surface is a convex surface and the image side surface is a concave surface, and the curvature radius of the object side surface is larger than the curvature radius of the image side surface. In this paper, when the center of a surface of a curved surface is closer to the image side than the surface itself, the radius of curvature of the surface is positive; otherwise, when the center of the surface of a curved surface is closer to the object side than the surface itself, the surface is The radius of curvature is negative.

The second lens 20 has a negative refractive power, the object side surface is convex and the image side surface is concave, and the curvature radius of the object side surface is larger than the curvature radius of the image side surface.

The object side surface of the third lens 30 is convex and the image side surface is concave, and the curvature radius of the object side surface is larger than the curvature radius of the image side surface, and the curvature radius of the object side surface and the image side surface are both positive values, so the third embodiment of the embodiment Lens 30 exhibits a slightly weaker negative power. Therefore, the first to third lenses of the present embodiment each have a negative refractive power, so that the six-piece lens can easily achieve a wide-angle and high-brightness effect, and can average the manufacturing sensitivity of the lens.

The fourth lens 40 has a positive refractive power, and the object side surface and the image side surface are convex surfaces and are a lenticular lens, that is, the curvature radius of the object side surface is positive and larger than the curvature radius of the image side surface.

The fifth lens 50 has a positive refractive power, and both the object side surface and the image side surface are convex surfaces and are a lenticular lens, that is, the curvature radius of the object side surface is positive and larger than the curvature radius of the image side surface.

The sixth lens 60 has a negative refractive power, the object side surface is concave and the image side surface is convex, the curvature radius of the object side surface is negative and larger than the curvature radius of the image side surface, and the fifth and sixth lenses 50, 60 are a glued lens. .

The design parameters of the six-piece lens of this embodiment are as shown in Table 1 below:

In this embodiment, the object side surface and the image side surface of the first, second, third, fifth, and sixth lenses 10, 20, 30, 50, and 60 are all spherical and are made of glass. The object side surface and the image side surface of the fourth lens 40 are aspherical and plastic materials, and the surface shape thereof satisfies the following formula:

Where c = 1 / r, r is the radius of curvature of the surface, h is the height of the light on the surface, k is the cone coefficient, A is the second order coefficient, B is the fourth order coefficient, C is the sixth order coefficient, D For the eighth-order coefficient, E is the tenth-order coefficient, F is the twelfth-order coefficient, G is the fourteenth-order coefficient, and H is the sixteenth-order coefficient. The parameters of each aspheric surface of the first embodiment are as shown in Table 2 below:

Based on the foregoing design, the system focal length value f of the present embodiment is 2.48 mm, the system length is 21.7 mm, and the combined focal length value f123 of the first to third lenses 10, 20, 30 is -2.52 mm, and the fourth to sixth lenses 40 The composite focal length value f456 of 50, 60 is 4.19 mm, the angle of view at the maximum image height is 128 degrees, and the aperture value (f-number) is 2.0.

At this time, the ratio of the focal length value f of the system to the radius of curvature r1 of the side surface of the first lens 10 is 40.395, the ratio of the focal length value f of the system to the curvature radius r2 of the image side of the first lens 10 is 1.359, and the focal length value f of the system and the second lens are The absolute value of the ratio of the radius of curvature r3 of the side surface of the object 20 is 6.565, the ratio of the focal length value f of the system to the curvature radius r4 of the image side of the second lens 20 is 1.294, and the focal length value f of the system and the radius of curvature r5 of the side surface of the third lens 30 are The ratio is 3.141, the ratio of the focal length value f of the system to the curvature radius r6 of the third lens 30 is 2.577, and the ratio of the focal length value f of the system to the radius of curvature r7 of the side of the fourth lens 40 is 1.935, and the focal length of the system is The ratio of the value f to the image side curvature radius r8 of the fourth lens 40 is -1.984, the ratio of the system focal length value f to the curvature radius r9 of the side surface of the fifth lens 50 is 3.637, the system focal length value f and the image curvature of the fifth lens 50 side. The ratio of the radius r10 is -1.254, the ratio of the system focal length value f to the radius of curvature r11 of the side surface of the sixth lens 60 is -1.254, and the ratio of the system focal length value f to the image side curvature radius r12 of the sixth lens 60 is -3.528, the system The ratio of the focal length value f to the full length TTL of the system is 0.114.

At this time, the ratio of the system focal length value f to the third lens 30 focal length value f3 is -0.022, the ratio of the system focal length value f to the fourth lens 40 focal length value f4 is 0.496, and the fourth to sixth lenses 40, 50, 60 The ratio of the composite focal length value f456 to the combined focal length value f123 of the first to third lenses 10, 20, 30 is -1.663, and the ratio of the radius of curvature r1 of the side surface of the first lens 10 to the radius of curvature r2 of the image side surface thereof is 29.727, The difference between the dispersion coefficient vd5 of the five lenses 50 and the dispersion coefficient vd6 of the sixth lens 60 is 40.78, and the ratio of the thickness ct1 at the optical axis of the first lens 10 to the thickness ct2 at the optical axis of the second lens 20 is 0.594. In this way, the six-piece lens has wide-angle, high-brightness, low chromatic aberration and distortion and field curvature. The lateral chromatic aberration diagram is as shown in Fig. 1A, and the maximum lateral chromatic aberration value does not exceed 2 μm. As shown in Figure 1B, the minimum phase contrast is still as high as 93%, and the F-theta distortion at its maximum image height is within -10.9%.

Please refer to FIG. 2 , which is a second embodiment of the present invention. The lens configuration is similar to that of the first embodiment. The design parameters of the six-piece lens of this embodiment are as shown in Table 3 below:

In this embodiment, the object side surface and the image side surface of the first, second, fourth, fifth, and sixth lenses 10, 20, 40, 50, and 60 are all spherical and are made of glass. The object side surface and the image side surface of the third lens 30 are aspherical and plastic materials, and the surface shape thereof satisfies the following formula:

Where c = 1 / r, r is the radius of curvature of the surface, h is the height of the light on the surface, k is the cone coefficient, A is the second order coefficient, B is the fourth order coefficient, C is the sixth order coefficient, D For the eighth-order coefficient, E is the tenth-order coefficient, F is the twelfth-order coefficient, G is the fourteenth-order coefficient, and H is the sixteenth-order coefficient. The parameters of each aspheric surface of the second embodiment are as shown in Table 4 below:

Based on the foregoing design, the system focal length value f of the present embodiment is 2.59 mm, the system length is 20.97 mm, and the composite focal length value f123 of the first to third lenses 10, 20, 30 is -3.19 mm, and the fourth to sixth lenses 40 The composite focal length value f456 of 50, 60 is 4.35 mm, the angle of view at the maximum image height is 125 degrees, and the aperture value (f-number) is 2.0.

At this time, the ratio of the focal length value f of the system to the radius of curvature r1 of the side surface of the first lens 10 is 38.68, the ratio of the focal length value f of the system to the curvature radius r2 of the image side of the first lens 10 is 1.201, and the focal length value f of the system and the second lens are The absolute value of the ratio of the radius of curvature r3 of the side of the object is 109.185, and the system focal length value f and The ratio of the curvature radius r4 of the two lenses 20 is 2.969, the ratio of the focal length value f of the system to the radius of curvature r5 of the side surface of the third lens 30 is 1.629, and the ratio of the focal length value f of the system to the curvature radius r6 of the image side of the third lens 30 is 1.436, the ratio of the focal length value f of the system to the radius of curvature r7 of the side of the fourth lens 40 is 2.672, the ratio of the focal length value f of the system to the curvature radius r8 of the image of the fourth lens 40 is -1.9, the focal length of the system f and the fifth lens The ratio of the radius of curvature r9 of the side of the 50 object is 4.108, the ratio of the focal length value f of the system to the radius of curvature r10 of the fifth lens 50 is -1.124, and the ratio of the focal length value f of the system to the radius of curvature r11 of the side of the sixth lens 60 is -1.124, the ratio of the system focal length value f to the image side curvature radius r12 of the sixth lens 60 is -3.718, and the ratio of the system focal length value f to the system full length TTL is 0.124.

At this time, the ratio of the system focal length value f to the third lens 30 focal length value f3 is -0.015, the ratio of the system focal length value f to the fourth lens 40 focal length value f4 is 0.493, and the fourth to sixth lenses 40, 50, 60 The ratio of the composite focal length value f456 to the combined focal length value f123 of the first to third lenses 10, 20, 30 is -1.364, and the ratio of the radius of curvature r1 of the side surface of the first lens 10 to the radius of curvature r2 of the image side thereof is 32.212, The difference between the dispersion coefficient vd5 of the five lenses 50 and the dispersion coefficient vd6 of the sixth lens 60 is 40.78, and the ratio of the thickness ct1 at the optical axis of the first lens 10 to the thickness ct2 at the optical axis of the second lens 20 is 0.484. In this way, the six-piece lens has wide-angle, high-brightness, low chromatic aberration and distortion and field curvature. The lateral chromatic aberration diagram is as shown in Fig. 2A, and the maximum lateral chromatic aberration value does not exceed 1 μm. As shown in Figure 2B, the minimum phase contrast is still up to 90%, and the F-theta distortion at its maximum image height is within -12.2%.

Please refer to FIG. 3 , which is a third embodiment of the present invention, and the lens configuration is similar to that of the first embodiment. The difference is that the object side of the second lens 20 is concave in this embodiment. The design parameters of the six-piece lens are shown in Table 5 below:

In this embodiment, the object side surface and the image side surface of the first, third, fifth, and sixth lenses 10, 30, 50, and 60 are all spherical and are made of glass. The object side surface and the image side surface of the second and fourth lenses 20 and 40 are both aspherical and plastic materials, and the surface shape thereof satisfies the following formula:

Where c = 1 / r, r is the radius of curvature of the surface, h is the height of the light on the surface, k is the cone coefficient, A is the second order coefficient, B is the fourth order coefficient, C is the sixth order coefficient, D For the eighth-order coefficient, E is the tenth-order coefficient, F is the twelfth-order coefficient, G is the fourteenth-order coefficient, and H is the sixteenth-order coefficient. The parameters of each aspheric surface of the third embodiment are as shown in Table 6 below:

Based on the foregoing design, the focal length value f of the system of the present embodiment is 2.69 mm, the system length is 19.35 mm, and the composite focal length value f123 of the first to third lenses 10, 20, 30 is -2.41 mm, the fourth to The composite focal length value f456 of the sixth lens 40, 50, 60 is 3.92 mm, the angle of view at the maximum image height is 127 degrees, and the aperture value (f-number) is 2.0.

At this time, the ratio of the focal length value f of the system to the radius of curvature r1 of the side surface of the first lens 10 is 34.848, the ratio of the focal length value f of the system to the curvature radius r2 of the image side of the first lens 10 is 1.331, and the focal length value f of the system and the second lens are The absolute value of the ratio of the radius of curvature r3 of the side surface of the object 20 is 6.955, the ratio of the focal length value f of the system to the curvature radius r4 of the image side of the second lens 20 is 1.383, and the focal length value f of the system and the radius of curvature r5 of the side surface of the third lens 30 are The ratio is 3.413, the ratio of the system focal length value f to the image side curvature radius r6 of the third lens 30 is 2.755, the ratio of the system focal length value f to the curvature radius r7 of the object side of the fourth lens 40 is 1.587, and the system focal length value f and the fourth The ratio of the lens 40 to the side curvature radius r8 is -1.766, the ratio of the system focal length value f to the curvature radius r9 of the fifth lens 50 side surface is 2.751, and the ratio of the system focal length value f to the fifth lens 50 image side curvature radius r10 is -1.119, the ratio of the system focal length value f to the curvature radius r11 of the side surface of the sixth lens 60 is -1.19, the ratio of the system focal length value f to the image side curvature radius r12 of the sixth lens 60 is - 2.732, the system focal length value f and the system Full-length TTL ratio 0.139.

At this time, the ratio of the system focal length value f to the third lens 30 focal length value f3 is -0.036, the ratio of the system focal length value f to the fourth lens 40 focal length value f4 is 0.574, and the fourth to sixth lenses 40, 50, 60 The ratio of the composite focal length value f456 to the combined focal length value f123 of the first to third lenses 10, 20, 30 is -1.627, and the ratio of the radius of curvature r1 of the side surface of the first lens 10 to the radius of curvature r2 of the image side thereof is 26.184, The difference between the dispersion coefficient vd5 of the five lenses 50 and the dispersion coefficient vd6 of the sixth lens 60 is 41.27, and the ratio of the thickness ct1 at the optical axis of the first lens 10 to the thickness ct2 at the optical axis of the second lens 20 is 0.467. In this way, the six-piece lens has wide-angle, high-brightness, low chromatic aberration and distortion and field curvature. The lateral chromatic aberration diagram is as shown in Fig. 3A, and the maximum lateral color difference does not exceed 1.3 μm. As shown in Figure 3B, the minimum phase contrast is still up to 89%, and the F-θ distortion at its maximum image height is within -17.5%.

10‧‧‧ first lens

20‧‧‧second lens

30‧‧‧ third lens

40‧‧‧Fourth lens

50‧‧‧ fifth lens

60‧‧‧ sixth lens

70‧‧‧ flat lenses

L‧‧‧ optical axis

A‧‧‧ object side

B‧‧‧ image side

ST‧‧‧ aperture

Claims (25)

A six-piece wide-angle lens comprising, in order from the object side to the image side, a first lens having a negative refractive power, a radius of curvature of the object side surface being larger than a radius of curvature of the image side surface, and a second lens having a negative refractive power and a radius of curvature of the object side surface a third lens having a curvature radius larger than a curvature radius of the image side surface, wherein a radius of curvature of a side surface of the third lens object is a positive value; an aperture; a fourth lens having a positive refractive power and a side surface thereof The radius of curvature is larger than the radius of curvature of the side surface, wherein the radius of curvature of the side surface of the fourth lens object is positive; a fifth lens has a positive refractive power, and the radius of curvature of the object side surface is larger than the radius of curvature of the side surface of the image, wherein the radius of curvature of the side surface of the fifth lens object A positive value; and a sixth lens having a negative refractive power, the radius of curvature of the object side surface being larger than the radius of curvature of the side surface of the image, wherein the radius of curvature of the side surface of the sixth lens object is a negative value. A six-piece wide-angle lens comprising, in order from the object side to the image side, a first lens having a negative refractive power, a radius of curvature of the object side surface being larger than a radius of curvature of the image side surface, and a second lens having a negative refractive power and a radius of curvature of the object side surface Less than the radius of curvature of the side surface; a third lens having a radius of curvature of the object side surface larger than the radius of curvature of the image side surface, wherein the radius of curvature of the side surface of the third lens image is positive; an aperture; a fourth lens having positive refractive power, the side of the object The radius of curvature is larger than the radius of curvature of the side surface, wherein the radius of curvature of the side of the fourth lens object is a positive value; a fifth lens having a positive refractive power, a radius of curvature of the object side surface is larger than a radius of curvature of the side surface of the image, wherein a radius of curvature of a side surface of the fifth lens object is a positive value; and a sixth lens having a negative refractive power, the radius of curvature of the object side surface being larger than the image The radius of curvature of the side surface, wherein the radius of curvature of the side of the sixth lens object is a negative value. A six-piece wide-angle lens comprising, in order from the object side to the image side, a first lens having a negative refractive power and a concave side of the image side surface; a second lens having a negative refractive power and a concave side of the image side; a third lens a side surface of the object is convex and the side surface is concave; an aperture; a fourth lens having a positive refractive power, the object side and the image side are convex; a fifth lens having a positive refractive power, the object side and the image side a convex surface; and a sixth lens having a negative refractive power, the object side surface being a concave surface and the image side surface being a convex surface. The six-piece wide-angle lens of any one of claims 1 to 3, wherein the third lens has a negative refractive power. The six-piece wide-angle lens according to any one of claims 1 to 3, wherein the object side of the first lens is convex. The six-piece wide-angle lens according to any one of claims 1 to 3, which satisfies the following relation: -0.038<f/f3<-0.015; wherein f is a system focal length value of the six-piece wide-angle lens, and f3 is the The focal length value of the third lens. The six-piece wide-angle lens according to any one of claims 1 to 3, which satisfies the following relationship: - 1.75 < f456 / f123 < - 1.3; wherein f456 is the composite focal length value of the fourth to sixth lenses, and f123 is the composite focal length value of the first to third lenses. The six-piece wide-angle lens according to any one of claims 1 to 3, which satisfies the following relationship: 25 < r1/r2<33; wherein r1 is the radius of curvature of the side of the first lens object, and r2 is the first lens image The radius of curvature of the side. The six-piece wide-angle lens according to any one of claims 1 to 3, which satisfies the following relationship: 0.47<f/f4<0.6; wherein f is a system focal length value of the six-chip wide-angle lens, and f4 is the fourth The focal length of the lens. The six-piece wide-angle lens according to any one of claims 1 to 3, which satisfies the following relationship: vd5-vd6>35; wherein vd5 is the dispersion coefficient of the fifth lens, and vd6 is the dispersion coefficient of the sixth lens. The six-piece wide-angle lens according to any one of claims 1 to 3, which satisfies the following relationship: 0.44 < ct1/ct2 < 0.63; wherein ct1 is the thickness at the optical axis of the first lens, and ct2 is the second lens light. The thickness at the shaft. The six-piece wide-angle lens of any one of claims 1 to 3, wherein the fifth and sixth lenses are a glued lens. The six-piece wide-angle lens according to any one of claims 1 to 3, which satisfies the following relationship: 34.8 <f/r1<40.4; wherein f is a system focal length value of the six-chip wide-angle lens, and r1 is the first The radius of curvature of the side of the lens. The six-piece wide-angle lens according to any one of claims 1 to 3, which satisfies the following relationship: 1.2<f/r2<1.36; wherein f is a system focal length value of the six-chip wide-angle lens, and r2 is the first The radius of curvature of the lens like the side. The six-piece wide-angle lens according to any one of claims 1 to 3, which satisfies the following relationship: 6.5<| f/r3 |<110; wherein f is a system focal length value of the six-piece wide-angle lens, and r3 is the The radius of curvature of the side of the second lens. The six-piece wide-angle lens according to any one of claims 1 to 3, which satisfies the following relationship: 1.29<f/r4<3; wherein f is a system focal length value of the six-chip wide-angle lens, and r4 is the second The radius of curvature of the lens like the side. The six-piece wide-angle lens according to any one of claims 1 to 3, which satisfies the following relationship: 1.6 < f / r 5 < 3.42; where f is the system focal length value of the six-piece wide-angle lens, and r5 is the radius of curvature of the side of the third lens. The six-piece wide-angle lens according to any one of claims 1 to 3, which satisfies the following relationship: 1.4<f/r6<2.8; wherein f is a system focal length value of the six-chip wide-angle lens, and r6 is the third The radius of curvature of the lens like the side. The six-piece wide-angle lens according to any one of claims 1 to 3, which satisfies the following relationship: 1.5<f/r7<2.7; wherein f is a system focal length value of the six-chip wide-angle lens, and r7 is the fourth The radius of curvature of the side of the lens. The six-piece wide-angle lens according to any one of claims 1 to 3, which satisfies the following relationship: -2<f/r8<-1.7; wherein f is a system focal length value of the six-chip wide-angle lens, r8 is the The radius of curvature of the side of the fourth lens image. The six-piece wide-angle lens according to any one of claims 1 to 3, which satisfies the following relationship: 2.7<f/r9<4.2; Where f is the system focal length value of the six-piece wide-angle lens, and r9 is the radius of curvature of the side of the fifth lens. The six-piece wide-angle lens according to any one of claims 1 to 3, which satisfies the following relationship: -1.3<f/r10<-1.1; wherein f is a system focal length value of the six-chip wide-angle lens, r10 is the The radius of curvature of the side of the fifth lens image. The six-piece wide-angle lens according to any one of claims 1 to 3, which satisfies the following relationship: -1.3<f/r11<-1.1; wherein f is a system focal length value of the six-piece wide-angle lens, r11 is the The radius of curvature of the side of the sixth lens. The six-piece wide-angle lens according to any one of claims 1 to 3, which satisfies the following relationship: -3.8 <f/r12<-2.7; wherein f is a system focal length value of the six-piece wide-angle lens, r12 is the The radius of curvature of the side of the sixth lens image. The six-piece wide-angle lens according to any one of claims 1 to 3, which satisfies the following relationship: 0.1 < f / TTL < 0.15; wherein f is a system focal length value of the six-chip wide-angle lens, and TTL is the six pieces The full length of the wide-angle lens system.