TWI606260B - Six-piece optical lens system - Google Patents

Description

Six-piece imaging lens set

The present invention relates to a six-piece imaging lens set, and more particularly to a miniaturized six-piece imaging lens set for use in electronic products.

In recent years, portable electronic devices such as smart phones and tablet computers have developed rapidly. Miniaturized optical lenses for use in portable electronic devices are indispensable, and with the advancement of semiconductor process technology, smaller areas have been developed. The higher pixel image sensor leads the miniaturized optical lens into the high-resolution field, so the image quality has become the research direction of various industry players.

High-fidelity miniaturized optical lenses that are traditionally mounted on electronic devices use a five-piece lens structure, but because of high-end smart phones, wearable devices, and tablets (Tablet Personal Computer) The prevalence of portable electronic devices with high-profile specifications has driven the demand for miniaturized optical lenses in terms of pixel quality and imaging quality. The conventional five-piece optical lens will not be able to meet higher-order requirements.

At present, there are developments of conventional six-piece optical lenses to provide photographic lenses with large apertures and high image quality. However, the total optical length of an optical lens with a large aperture and high image quality tends to be too long, making it difficult for the optical lens to have both large aperture, high image quality, and miniaturization characteristics, and is not advantageous for use in portable electronic devices. on.

Therefore, the continuous development of an optical lens having both a large aperture, high image quality, and miniaturization characteristics is an incentive for the development of the present invention.

It is an object of the present invention to provide a six-piece imaging lens set, and more particularly to a six-piece imaging lens set that combines large aperture, high image quality, and miniaturization characteristics.

In order to achieve the foregoing objective, a six-piece imaging lens set according to the present invention comprises, in order from the object side to the image side, an aperture; a first lens having a positive refractive power, the object side surface being near The optical axis is a convex surface, and the image side surface is concave at the near optical axis, and at least one surface of the object side surface and the image side surface is aspherical; a second lens has a negative refractive power, and the object side surface is near the optical axis The convex surface has a concave surface at the near-optical axis of the image side surface, and at least one surface of the object side surface and the image side surface is aspherical; a third lens has a positive refractive power, and the object side surface has a convex surface at a near optical axis. The image side surface of the image has a convex surface, and at least one surface of the object side surface and the image side surface is aspherical; a fourth lens has a negative refractive power, and the object side surface is concave at the near optical axis, and the image side thereof The surface near the optical axis is convex, and at least one surface of the object side surface and the image side surface is aspherical; a fifth lens has a positive refractive power, and the object side surface is convex at the near optical axis, and the image side surface is low beam The shaft is concave, and its object side surface and image side surface are A surface is aspherical; a sixth lens has a negative refractive power, and the object side surface is concave at a near optical axis, and the image side surface is convex at a near optical axis, and at least one surface of the object side surface and the image side surface is The aspherical surface has at least one surface of the object side surface and the image side surface having at least one inflection point.

Preferably, wherein the focal length of the first lens is f1, the focal length of the second lens is f2, and the following condition is satisfied: -0.7 < f1/f2 < -0.3. Thereby, the refractive power arrangement of the first lens and the second lens is suitable, which is advantageous for obtaining a wide angle of view (angle of view) and reducing excessive increase of system aberration.

Preferably, wherein the focal length of the second lens is f2, the focal length of the third lens is f3, and the following condition is satisfied: -1.0 < f2/f3 < -0.6. Thereby, the refractive power of the third lens can be effectively distributed while ensuring that the refractive power of the third lens is not excessively large, which is advantageous in reducing system sensitivity and reducing generation of aberrations.

Preferably, wherein the focal length of the third lens is f3, the focal length of the fourth lens is f4, and the following condition is satisfied: -1.3 < f3/f4 < -0.7. Thereby, the refractive power of the fourth lens can be effectively distributed while ensuring that the refractive power of the fourth lens is not excessively large, which is advantageous for reducing system sensitivity and reducing generation of aberrations.

Preferably, wherein the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, and the following condition is satisfied: -1.9 < f4/f5 < -1.3. Thereby, the refractive power of the fifth lens can be effectively distributed while ensuring that the refractive power of the fifth lens is not excessively large, which is advantageous for reducing system sensitivity and reducing generation of aberrations.

Preferably, wherein the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, and the following condition is satisfied: -1.4 < f5/f6 < -0.7. Thereby, the refractive power of the sixth lens can be effectively distributed while ensuring that the refractive power of the sixth lens is not excessively large, which is advantageous in reducing system sensitivity and reducing generation of aberrations.

Preferably, wherein the focal length of the first lens is f1, the focal length of the third lens is f3, and the following condition is satisfied: 0.2 < f1/f3 < 0.6. Thereby, the balance of the refractive power of the six-piece imaging lens group can be maintained, thereby achieving the best imaging effect.

Preferably, wherein the second lens has a focal length of f2, the fourth lens has a focal length of f4, and satisfies the following condition: 0.6 < f2/f4 < 1.0. Thereby, it is advantageous to enhance the large viewing angle and large aperture characteristics of the six-piece imaging lens group, and the sensitivity thereof can be reduced, which is advantageous for the manufacture of each lens and the improvement of the production yield.

Preferably, wherein the focal length of the third lens is f3, the focal length of the fifth lens is f5, and the following condition is satisfied: 1.3 < f3/f5 < 2.0. Thereby, it is advantageous to enhance the large viewing angle and large aperture characteristics of the six-piece imaging lens group, and the sensitivity thereof can be reduced, which is advantageous for the manufacture of each lens and the improvement of the production yield.

Preferably, wherein the focal length of the fourth lens is f4, the focal length of the sixth lens is f6, and the following condition is satisfied: 1.3 < f4/f6 < 2.0. Thereby, it is advantageous to enhance the large viewing angle and large aperture characteristics of the six-piece imaging lens group, and the sensitivity thereof can be reduced, which is advantageous for the manufacture of each lens and the improvement of the production yield.

Preferably, wherein the focal length of the first lens is f1, the combined focal length of the second lens and the third lens is f23, and the following condition is satisfied: -0.1 < f1/f23 < -0.03. Thereby, the balance of the refractive power of the six-piece imaging lens group can be maintained, thereby achieving the best imaging effect.

Preferably, wherein the second lens and the third lens have a combined focal length of f23, the fourth lens has a focal length of f4, and satisfies the following condition: 3.0 <f23/f4 < 7.0. Thereby, it is advantageous to enhance the large viewing angle and large aperture characteristics of the six-piece imaging lens group, and the sensitivity thereof can be reduced, which is advantageous for the manufacture of each lens and the improvement of the production yield.

Preferably, wherein the combined focal length of the second lens and the third lens is f23, the combined focal length of the fourth lens and the fifth lens is f45, and the following condition is satisfied: -5.0 <f23/f45 < -3.8. When f23/f45 satisfies the foregoing relationship, the six-image imaging lens set can have a large picture angle, a high number of pictures, and a low lens height, and the image resolution capability is significantly improved. Otherwise, if the optical data value is exceeded. The range will result in problems with the performance, low resolution, and insufficient yield of the six-piece imaging lens set.

Preferably, wherein the combined focal length of the first lens and the second lens is f12, the combined focal length of the third lens and the fourth lens is f34, and the following condition is satisfied: -0.1 < f12/f34 < -0.03. When f12/f34 satisfies the foregoing relationship, the six-piece imaging lens group can have a large picture angle, a high number of pictures, and a low lens height, and the resolution capability is significantly improved. Conversely, if the optical data value is exceeded. The range will result in problems with the performance, low resolution, and insufficient yield of the six-piece imaging lens set.

Preferably, wherein the combined focal length of the third lens and the fourth lens is f34, the combined focal length of the fifth lens and the sixth lens is f56, and the following condition is satisfied: -3.5 < f34/f56 < -2.3. When f34/f56 satisfies the foregoing relationship, the six-image imaging lens group can have a large picture angle, a high number of pictures, and a low lens height, and the resolution capability is significantly improved. Conversely, if the optical data value is exceeded. The range will result in problems with the performance, low resolution, and insufficient yield of the six-piece imaging lens set.

Preferably, wherein the fourth lens and the fifth lens have a combined focal length of f45, the sixth lens has a focal length of f6, and satisfies the following condition: -2.6 < f45/f6 < -1.3. When f45/f6 satisfies the foregoing relationship, the six-piece imaging lens group can have a large picture angle, a high number of pictures, and a low lens height, and the resolution capability is remarkably improved. Otherwise, if the optical data value is exceeded. The range will result in problems with the performance, low resolution, and insufficient yield of the six-piece imaging lens set.

Preferably, wherein the focal length of the first lens is f1, the combined focal length of the second lens, the third lens and the fourth lens is f234, and the following condition is satisfied: -0.7 < f1/f234 < -0.3. By proper configuration of the refractive power, it helps to reduce the occurrence of spherical aberration and astigmatism.

Preferably, wherein the second lens, the third lens and the fourth lens have a combined focal length of f234, the fifth lens has a focal length of f5, and satisfies the following condition: -1.6 < f234/f5 < -1.0. By proper configuration of the refractive power, it helps to reduce the occurrence of spherical aberration and astigmatism.

Preferably, wherein the second lens, the third lens and the fourth lens have a combined focal length of f234, and the combined focal length of the fifth lens and the sixth lens is f56, and the following condition is satisfied: -0.35 < f234/f56 < - 0.05. By proper configuration of the refractive power, it helps to reduce the occurrence of spherical aberration and astigmatism.

Preferably, wherein the first lens, the second lens and the third lens have a combined focal length of f123, the fourth lens has a focal length of f4, and satisfies the following condition: -0.6 < f123/f4 < -0.2.

Preferably, wherein the first lens, the second lens and the third lens have a combined focal length of f123, the fourth lens and the fifth lens have a combined focal length of f45, and satisfy the following condition: 0.15 <f123/f45 < 0.5. When f123/f45 satisfies the foregoing relationship, the six-piece imaging lens set can have a large picture angle, a high number of pictures, and a low lens height, and the resolution capability is significantly improved. Conversely, if the optical data value is exceeded. The range will result in problems with the performance, low resolution, and insufficient yield of the six-piece imaging lens set.

Preferably, the composite focal length of the first lens, the second lens and the third lens is f123, and the combined focal length of the fourth lens, the fifth lens and the sixth lens is f456, and the following condition is satisfied: -0.6 <f123 /f456 < -0.2. When f123/f456 satisfies the foregoing relationship, the six-piece imaging lens set can have a large picture angle, a high number of pictures, and a low lens height, and the resolution capability is significantly improved. Conversely, if the optical data value is exceeded. The range will result in problems with the performance, low resolution, and insufficient yield of the six-piece imaging lens set.

Preferably, wherein the first lens has a dispersion coefficient of V1, the second lens has a dispersion coefficient of V2, and satisfies the following condition: 30 < V1 - V2 < 42. Thereby, the chromatic aberration of the six-piece imaging lens group can be corrected.

Preferably, wherein the third lens has a dispersion coefficient of V3, the fourth lens has a dispersion coefficient of V4, and satisfies the following condition: 30 < V3-V4<42. Thereby, the chromatic aberration of the six-piece imaging lens group can be corrected.

Preferably, wherein the overall focal length of the six-piece imaging lens group is f, the distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, and the following condition is satisfied: 0.6 < f/TL < 0.95 . Thereby, it is advantageous to obtain a wide angle of view (angle of view) and to facilitate the miniaturization of the six-piece imaging lens group to be mounted on a thin electronic product.

The present invention has been described with reference to the preferred embodiments of the present invention in accordance with the accompanying drawings.

<First Embodiment>

1A and FIG. 1B, FIG. 1A is a schematic diagram of a six-piece imaging lens set according to a first embodiment of the present invention, and FIG. 1B is a left-to-right sequential six-piece imaging lens group of the first embodiment. Image curvature and distortion curve. As can be seen from FIG. 1A, the six-piece imaging lens assembly includes an aperture 100 and an optical group. The optical group includes a first lens 110, a second lens 120, a third lens 130, and a fourth from the object side to the image side. The lens 140, the fifth lens 150, the sixth lens 160, the infrared filter element 170, and the imaging surface 180, wherein the lens of the six-piece imaging lens group has a refractive power of six. The aperture 100 is disposed between the image side surface 112 of the first lens 110 and the subject.

The first lens 110 has a positive refractive power and is made of a plastic material. The object side surface 111 is convex at the near optical axis 190, and the image side surface 112 is concave at the near optical axis 190, and the object side surface 111 and the image side are Surface 112 is aspherical.

The second lens 120 has a negative refractive power and is made of a plastic material. The object side surface 121 is convex at the near optical axis 190, and the image side surface 122 is concave at the near optical axis 190, and the object side surface 121 and the image side are Surface 122 is aspherical.

The third lens 130 has a positive refractive power and is made of a plastic material. The object side surface 131 is convex at the near optical axis 190, and the image side surface 132 is convex at the near optical axis 190, and the object side surface 131 and the image side are The surfaces 132 are all aspherical.

The fourth lens 140 has a negative refractive power and is made of a plastic material. The object side surface 141 is concave at the near optical axis 190, and the image side surface 142 is convex at the near optical axis 190, and the object side surface 141 and the image side are Surfaces 142 are all aspherical.

The fifth lens 150 has a positive refractive power and is made of a plastic material. The object side surface 151 is convex at the near optical axis 190, and the image side surface 152 is concave at the near optical axis 190, and the object side surface 151 and the image side are Surface 152 is aspherical.

The sixth lens 160 has a negative refractive power and is made of a plastic material. The object side surface 161 is concave at the near optical axis 190, and the image side surface 162 is convex at the near optical axis 190, and the object side surface 161 and the image side are The surface 162 is aspherical, and the object side surface 161 and the image side surface 162 have at least one surface having at least one inflection point.

The infrared filter element 170 is made of glass and disposed between the sixth lens 160 and the imaging surface 180 without affecting the focal length of the six-piece imaging lens group.

The aspherical curve equations of the above lenses are expressed as follows:

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td width="160" height="301"></td></tr><tr> <td></td><td><img wi="607" he="60" file="02_image001.jpg" img-format="jpg"></img></td></tr>< /TBODY></TABLE>

Where z is the position value with reference to the surface apex at a position of height h in the direction of the optical axis 190; c is the curvature of the lens surface near the optical axis 190, and is the reciprocal of the radius of curvature (R) (c = 1/R) R is the radius of curvature of the lens surface near the optical axis 190, h is the vertical distance of the lens surface from the optical axis 190, k is a conic constant, and A, B, C, D, E, G, ... are High order aspheric coefficient.

In the six-piece imaging lens group of the first embodiment, the focal length of the six-piece imaging lens group is f, the aperture value (f-number) of the six-piece imaging lens group is Fno, and the maximum magnification of the six-piece imaging lens group. The field angle is FOV and its values are as follows: f = 3.89 (mm); Fno = 2.0; and FOV = 78 (degrees).

In the six-piece imaging lens group of the first embodiment, the focal length of the first lens 110 is f1, the focal length of the second lens 120 is f2, and the following condition is satisfied: f1/f2 = -0.47.

In the six-piece imaging lens group of the first embodiment, the focal length of the second lens 120 is f2, the focal length of the third lens 130 is f3, and the following condition is satisfied: f2/f3 = -0.80.

In the six-piece imaging lens group of the first embodiment, the focal length of the third lens 130 is f3, the focal length of the fourth lens 140 is f4, and the following condition is satisfied: f3/f4 = -1.03.

In the six-piece imaging lens group of the first embodiment, the focal length of the fourth lens 140 is f4, the focal length of the fifth lens 150 is f5, and the following condition is satisfied: f4/f5 = -1.59.

In the six-piece imaging lens group of the first embodiment, the focal length of the fifth lens 150 is f5, the focal length of the sixth lens 160 is f6, and the following condition is satisfied: f5/f6 = -1.08.

In the six-piece imaging lens group of the first embodiment, the focal length of the first lens 110 is f1, the focal length of the third lens 130 is f3, and the following condition is satisfied: f1/f3 = 0.37.

In the six-piece imaging lens group of the first embodiment, the focal length of the second lens 120 is f2, the focal length of the fourth lens 140 is f4, and the following condition is satisfied: f2/f4 = 0.83.

In the six-piece imaging lens group of the first embodiment, the focal length of the third lens 130 is f3, the focal length of the fifth lens 150 is f5, and the following condition is satisfied: f3/f5 = 1.64.

In the six-piece imaging lens group of the first embodiment, the focal length of the fourth lens 140 is f4, the focal length of the sixth lens 160 is f6, and the following condition is satisfied: f4/f6 = 1.71.

In the six-piece imaging lens set of the first embodiment, the focal length of the first lens 110 is f1, the combined focal length of the second lens 120 and the third lens 130 is f23, and the following conditions are satisfied: f1/f23 = -0.06 .

In the six-piece imaging lens set of the first embodiment, the composite focal length of the second lens 120 and the third lens 130 is f23, and the focal length of the fourth lens 140 is f4, and the following condition is satisfied: f23/f4 = 6.06.

In the six-piece imaging lens set of the first embodiment, the composite focal length of the second lens 120 and the third lens 130 is f23, and the combined focal length of the fourth lens 140 and the fifth lens 150 is f45, and the following conditions are satisfied: F23/f45 = -4.58.

In the six-piece imaging lens set of the first embodiment, the composite focal length of the first lens 110 and the second lens 120 is f12, and the combined focal length of the third lens 130 and the fourth lens 140 is f34, and the following conditions are met: F12/f34 = -0.05.

In the six-piece imaging lens set of the first embodiment, the combined focal length of the third lens 130 and the fourth lens 140 is f34, and the combined focal length of the fifth lens 150 and the sixth lens 160 is f56, and the following conditions are satisfied: F34/f56 = -2.69.

In the six-piece imaging lens set of the first embodiment, the composite focal length of the fourth lens 140 and the fifth lens 150 is f45, and the focal length of the sixth lens 160 is f6, and the following conditions are satisfied: f45/f6 = -2.26 .

In the six-piece imaging lens set of the first embodiment, the focal length of the first lens 110 is f1, and the combined focal length of the second lens 120, the third lens 130, and the fourth lens 140 is f234, and the following conditions are met: f1 /f234 = -0.48.

In the six-piece imaging lens set of the first embodiment, the composite focal length of the second lens 120, the third lens 130, and the fourth lens 140 is f234, and the focal length of the fifth lens 150 is f5, and the following conditions are satisfied: f234 /f5 = -1.29.

In the six-piece imaging lens set of the first embodiment, the composite focal length of the second lens 120, the third lens 130, and the fourth lens 140 is f234, and the combined focal length of the fifth lens 150 and the sixth lens 160 is f56. And the following conditions are met: f234/f56 = -0.17.

In the six-piece imaging lens set of the first embodiment, the composite focal length of the first lens 110, the second lens 120, and the third lens 130 is f123, and the focal length of the fourth lens 140 is f4, and the following conditions are met. : f123/f4 = -0.43.

In the six-piece imaging lens set of the first embodiment, the composite focal length of the first lens 110, the second lens 120 and the third lens 130 is f123, and the combined focal length of the fourth lens 140 and the fifth lens 150 is f45. And meet the following conditions: f123/f45 = 0.33.

In the six-piece imaging lens set of the first embodiment, the first lens 110, the second lens 120 and the third lens 130 have a combined focal length f123, and the fourth lens 140, the fifth lens 150 and the sixth lens 160 The composite focal length is f456 and the following conditions are met: f123/f456 = -0.42.

In the six-piece imaging lens set of the first embodiment, the first lens 110 has a dispersion coefficient of V1, and the second lens 120 has a dispersion coefficient of V2 and satisfies the following conditions: V1-V2 = 34.5.

In the six-piece imaging lens group of the first embodiment, the third lens 130 has a dispersion coefficient of V3, and the fourth lens 140 has a dispersion coefficient of V4 and satisfies the following conditions: V3-V4 = 34.5.

In the six-piece imaging lens set of the first embodiment, the overall focal length of the six-piece imaging lens group is f, and the distance from the object-side surface 111 to the imaging surface 180 of the first lens 110 on the optical axis 190 is TL. The following conditions are met: f/TL = 0.85.

Refer to Table 1 and Table 2 below for reference.

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td><b>Table 1</b></td></tr><tr>< Td> first embodiment </td></tr><tr><td><u>f(</u><u>focal length) =3.89 mm (mm), Fno (aperture value) = 2.0, FOV (arrow angle) = 78 deg. (degrees)</u></td></tr><tr><td> surface </td><td> </td><td> radius of curvature </td ><td> Thickness</td><td> Material </td><td> Refractive Index </td><td> Dispersion Coefficient </td><td> Focal Length </td></tr><tr> <td> 0 </td><td> Subject </td><td> Unlimited</td><td> Unlimited</td><td> </td><td> </td><td > </td><td> </td></tr><tr><td> 1 </td><td> </td><td> Unlimited</td><td> 0.300 </td> <td> </td><td> </td><td> </td><td> </td></tr><tr><td> 2 </td><td> aperture</td ><td> Unlimited</td><td> -0.300 </td><td> </td><td> </td><td> </td><td> </td></tr> <tr><td> 3 </td><td> First lens</td><td> 1.421 </td><td> (ASP) </td><td> 0.629 </td><td> Plastic</td><td> 1.544 </td><td> 56.000 </td><td> 3.012 </td></tr><tr><td> 4 </td><td> </td ><td> 8.800 </td><td> (ASP) </td><td> 0.105 </td><td> </td><td> </td ><td> </td><td> </td></tr><tr><td> 5 </td><td> second lens</td><td> 13.326 </td><td > (ASP) </td><td> 0.239 </td><td> Plastic</td><td> 1.651 </td><td> 21.500 </td><td> -6.447 </td>< /tr><tr><td> 6 </td><td> </td><td> 3.196 </td><td> (ASP) </td><td> 0.324 </td><td> </td><td> </td><td> </td><td> </td></tr><tr><td> 7 </td><td> third lens</td> <td> 56.461 </td><td> (ASP) </td><td> 0.375 </td><td> Plastic</td><td> 1.544 </td><td> 56.000 </td> <td> 8.047 </td></tr><tr><td> 8 </td><td> </td><td> -4.757 </td><td> (ASP) </td>< Td> 0.342 </td><td> </td><td> </td><td> </td><td> </td></tr><tr><td> 9 </td> <td> Fourth lens</td><td> -0.933 </td><td> (ASP) </td><td> 0.302 </td><td> Plastic </td><td> 1.651 < /td><td> 21.500 </td><td> -7.790 </td></tr><tr><td> 10 </td><td> </td><td> -1.287 </td ><td> (ASP) </td><td> 0.054 </td><td> </td><td> </td><td> </td><td> </td></tr ><tr><td> 11 </td><td> Fifth lens</td><td> 1.594 </td><td> (ASP) </td><td> 0.496 </td><td > Plastic < /td><td> 1.544 </td><td> 56.000 </td><td> 4.899 </td></tr><tr><td> 12 </td><td> </td>< Td> 3.509 </td><td> (ASP) </td><td> 0.402 </td><td> </td><td> </td><td> </td><td> < /td></tr><tr><td> 13 </td><td> Sixth lens</td><td> -2.437 </td><td> (ASP) </td><td> 0.352 </td><td> Plastic</td><td> 1.535 </td><td> 56.000 </td><td> -4.556 </td></tr><tr><td> 14 < /td><td> </td><td> -531.535 </td><td> (ASP) </td><td> 0.307 </td><td> </td><td> </td ><td> </td><td> </td></tr><tr><td> 15 </td><td> Infrared Filter Filter</td><td> Unlimited</td ><td> 0.300 </td><td> Glass</td><td> 1.517 </td><td> 64.167 </td><td> - </td></tr><tr><td > 16 </td><td> </td><td> Unlimited</td><td> 0.350 </td><td> </td><td> </td><td> </td> <td> </td></tr><tr><td> 17 </td><td> Imaging Surface </td><td> Unlimited</td><td> Unlimited</td><td> </td><td> </td><td> </td><td> </td></tr></TBODY></TABLE>

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td><b>Table 2</b></td></tr><tr>< Td> aspherical coefficient </td></tr><tr><td> surface </td><td> 3 </td><td> 4 </td><td> 5 </td><td > 6 </td><td> 7 </td><td> 8 </td></tr><tr><td> K: </td><td> -2.1156E-01 </td> <td> 1.9788E+01 </td><td> 1.9960E+02 </td><td> -2.3973E+01 </td><td> -2.0005E+02 </td><td> 9.1747 E+00 </td></tr><tr><td> A: </td><td> 1.8400E-02 </td><td> -1.3383E-01 </td><td> - 1.8482E-01 </td><td> -1.0924E-02 </td><td> -1.6042E-01 </td><td> -8.4133E-02 </td></tr><tr ><td> B: </td><td> -1.0375E-01 </td><td> 3.3723E-01 </td><td> 3.5010E-01 </td><td> 3.4261E- 01 </td><td> -8.2262E-02 </td><td> 5.0657E-02 </td></tr><tr><td> C: </td><td> 4.5840E- 01 </td><td> -1.4023E+00 </td><td> -2.9659E-01 </td><td> -9.5442E-01 </td><td> 1.1973E-01 </ Td><td> -4.8933E-01 </td></tr><tr><td> D: </td><td> -1.1060E+00 </td><td> 4.3185E+00 < /td><td> 3.6527E-01 </td><td> 3.0474E+00 </td><td> -4.6005E-01 </td><td> 1.2412E+00 </td></ Tr><tr><td> E: </td><td> 1.4320E+00 </td><td> -7.9438E+00 </td><td> -1.1238E+00 </td><td> -5.9281E+00 </td><td> 1.1688E+ 00 </td><td> -1.5349E+00 </td></tr><tr><td> F: </td><td> -9.5950E-01 </td><td> 7.5364E +00 </td><td> 1.7295E+00 </td><td> 6.0047E+00 </td><td> -1.8692E+00 </td><td> 9.4097E-01 </td ></tr><tr><td> G: </td><td> 2.3674E-01 </td><td> -2.8762E+00 </td><td> -9.0914E-01 </ Td><td> -2.2048E+00 </td><td> 1.3536E+00 </td><td> -1.9431E-01 </td></tr><tr><td> Surface </ Td><td> 9 </td><td> 10 </td><td> 11 </td><td> 12 </td><td> 13 </td><td> 14 </td> </tr><tr><td> K: </td><td> -3.8672E+00 </td><td> -8.2613E-01 </td><td> -1.0420E+01 </ Td><td> -9.6324E+00 </td><td> -3.9509E-02 </td><td> -1.2936E+03 </td></tr><tr><td> A: </td><td> 5.3042E-02 </td><td> 6.7135E-02 </td><td> -8.5886E-02 </td><td> 7.3665E-03 </td>< Td> 1.0270E-01 </td><td> 2.7623E-02 </td></tr><tr><td> B: </td><td> -3.1856E-01 </td>< Td> -7.0244E-02 </td><td> -6.4647E-02 </td><td> -1.9310E-01 </td><td> -2.2580E-01 </td><td> -1.1711E-01 </td></tr><tr><td> C: </td><td> 5.5836E-01 </td><td> 1.2369E-01 </td><td> 9.1343E-02 </td><td> 1.9947E-01 </td> <td> 1.6222E-01 </td><td> 8.4440E-02 </td></tr><tr><td> D: </td><td> -2.9469E-01 </td> <td> -3.6117E-02 </td><td> -6.8859E-02 </td><td> -1.3122E-01 </td><td> -5.4691E-02 </td><td > -2.9048E-02 </td></tr><tr><td> E: </td><td> -6.1208E-02 </td><td> -1.0500E-02 </td> <td> 2.1715E-02 </td><td> 5.1044E-02 </td><td> 9.9585E-03 </td><td> 5.2326E-03 </td></tr><tr ><td> F: </td><td> 1.1252E-01 </td><td> 3.8368E-03 </td><td> -1.3719E-03 </td><td> -1.0271E -02 </td><td> -9.5224E-04 </td><td> -4.7377E-04 </td></tr><tr><td> G: </td><td> - 3.2462E-02 </td><td> 4.5103E-06 </td><td> -2.5702E-04 </td><td> 8.2595E-04 </td><td> 3.7866E-05 < /td><td> 1.7037E-05 </td></tr></TBODY></TABLE>

Table 1 is the detailed structural data of the first embodiment of Fig. 1A, in which the unit of curvature radius, thickness and focal length is mm, and the surfaces 0-17 sequentially represent the surface from the object side to the image side. Table 2 is the aspherical data in the first embodiment, wherein the cone coefficients in the a-spherical curve equation of k, A, B, C, D, E, F, ... are high-order aspheric coefficients. In addition, the following table of the embodiments corresponds to the schematic diagram and the field curvature curve of each embodiment, and the definition of the data in the table is the same as the definitions of Table 1 and Table 2 of the first embodiment, and details are not described herein.

<Second embodiment>

2A and FIG. 2B, FIG. 2A is a schematic diagram of a six-piece imaging lens set according to a second embodiment of the present invention, and FIG. 2B is a six-piece imaging lens group of the second embodiment from left to right. Image curvature and distortion curve. As can be seen from FIG. 2A, the six-piece imaging lens assembly includes an aperture 200 and an optical group. The optical group includes a first lens 210, a second lens 220, a third lens 230, and a fourth from the object side to the image side. The lens 240, the fifth lens 250, the sixth lens 260, the infrared filter element 270, and the imaging surface 280, wherein the lens of the six-piece imaging lens group has six refractive forces. The aperture 200 is disposed between the image side surface 212 of the first lens 210 and the object.

The first lens 210 has a positive refractive power and is made of a plastic material. The object side surface 211 is convex at the near optical axis 290, and the image side surface 212 is concave at the near optical axis 290, and the object side surface 211 and the image side are Surface 212 is aspherical.

The second lens 220 has a negative refractive power and is made of a plastic material. The object side surface 221 is convex at the near optical axis 290, and the image side surface 222 is concave at the near optical axis 290, and the object side surface 221 and the image side are Surfaces 222 are all aspherical.

The third lens 230 has a positive refractive power and is made of a plastic material. The object side surface 231 is convex at the near optical axis 290, and the image side surface 232 is convex at the near optical axis 290, and the object side surface 231 and the image side are Surfaces 232 are all aspherical.

The fourth lens 240 has a negative refractive power and is made of a plastic material. The object side surface 241 is concave at the near optical axis 290, and the image side surface 242 is convex at the near optical axis 290, and the object side surface 241 and the image side are Surface 242 is aspherical.

The fifth lens 250 has a positive refractive power and is made of a plastic material. The object side surface 251 is convex at the near optical axis 290, and the image side surface 252 is concave at the near optical axis 290, and the object side surface 251 and the image side are Surface 252 is aspherical.

The sixth lens 260 has a negative refractive power and is made of a plastic material. The object side surface 261 is concave at the near optical axis 290, and the image side surface 262 is convex at the near optical axis 290, and the object side surface 261 and the image side are The surface 262 is aspherical, and the object side surface 261 and the image side surface 262 have at least one surface having at least one inflection point.

The infrared filter element 270 is made of glass and disposed between the fifth lens 250 and the imaging surface 280 without affecting the focal length of the six-piece imaging lens group.

Refer to Table 3 and Table 4 below.

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td><b>Table 3</b></td></tr><tr>< Td> Second embodiment </td></tr><tr><td><u>f(</u><u>focal length) =3.88 mm (mm), Fno (aperture value) = 2.0, FOV (drawn angle) = 79 deg. (degrees)</u></td></tr><tr><td> surface </td><td> </td><td> radius of curvature </td ><td> Thickness</td><td> Material </td><td> Refractive Index </td><td> Dispersion Coefficient </td><td> Focal Length </td></tr><tr> <td> 0 </td><td> Subject </td><td> Unlimited</td><td> Unlimited</td><td> </td><td> </td><td > </td><td> </td></tr><tr><td> 1 </td><td> </td><td> Unlimited</td><td> 0.327 </td> <td> </td><td> </td><td> </td><td> </td></tr><tr><td> 2 </td><td> aperture</td ><td> Unlimited</td><td> -0.327 </td><td> </td><td> </td><td> </td><td> </td></tr> <tr><td> 3 </td><td> First lens</td><td> 1.423 </td><td> (ASP) </td><td> 0.629 </td><td> Plastic</td><td> 1.544 </td><td> 56.000 </td><td> 3.015 </td></tr><tr><td> 4 </td><td> </td ><td> 8.844 </td><td> (ASP) </td><td> 0.105 </td><td> </td><td> </td ><td> </td><td> </td></tr><tr><td> 5 </td><td> second lens</td><td> 13.342 </td><td > (ASP) </td><td> 0.240 </td><td> Plastic</td><td> 1.651 </td><td> 21.500 </td><td> -6.430 </td>< /tr><tr><td> 6 </td><td> </td><td> 3.191 </td><td> (ASP) </td><td> 0.321 </td><td> </td><td> </td><td> </td><td> </td></tr><tr><td> 7 </td><td> third lens</td> <td> 76.456 </td><td> (ASP) </td><td> 0.375 </td><td> Plastic</td><td> 1.544 </td><td> 56.000 </td> <td> 8.123 </td></tr><tr><td> 8 </td><td> </td><td> -4.704 </td><td> (ASP) </td>< Td> 0.340 </td><td> </td><td> </td><td> </td><td> </td></tr><tr><td> 9 </td> <td> Fourth lens</td><td> -0.935 </td><td> (ASP) </td><td> 0.300 </td><td> Plastic </td><td> 1.651 < /td><td> 21.500 </td><td> -7.756 </td></tr><tr><td> 10 </td><td> </td><td> -1.290 </td ><td> (ASP) </td><td> 0.054 </td><td> </td><td> </td><td> </td><td> </td></tr ><tr><td> 11 </td><td> Fifth lens</td><td> 1.598 </td><td> (ASP) </td><td> 0.505 </td><td > Plastic < /td><td> 1.544 </td><td> 56.000 </td><td> 4.890 </td></tr><tr><td> 12 </td><td> </td>< Td> 3.532 </td><td> (ASP) </td><td> 0.397 </td><td> </td><td> </td><td> </td><td> < /td></tr><tr><td> 13 </td><td> Sixth lens</td><td> -2.441 </td><td> (ASP) </td><td> 0.351 </td><td> Plastic</td><td> 1.535 </td><td> 56.000 </td><td> -4.819 </td></tr><tr><td> 14 < /td><td> </td><td> -44.788 </td><td> (ASP) </td><td> 0.350 </td><td> </td><td> </td ><td> </td><td> </td></tr><tr><td> 15 </td><td> Infrared Filter Filter</td><td> Unlimited</td ><td> 0.300 </td><td> Glass</td><td> 1.517 </td><td> 64.167 </td><td> - </td></tr><tr><td > 16 </td><td> </td><td> Unlimited</td><td> 0.314 </td><td> </td><td> </td><td> </td> <td> </td></tr><tr><td> 17 </td><td> Imaging Surface </td><td> Unlimited</td><td> Unlimited</td><td> </td><td> </td><td> </td><td> </td></tr></TBODY></TABLE>

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td><b>Table 4</b></td></tr><tr>< Td> aspherical coefficient </td></tr><tr><td> surface </td><td> 3 </td><td> 4 </td><td> 5 </td><td > 6 </td><td> 7 </td><td> 8 </td></tr><tr><td> K: </td><td> -2.1068E-01 </td> <td> 2.0422E+01 </td><td> 2.0000E+02 </td><td> -2.3869E+01 </td><td> -2.0000E+02 </td><td> 9.2746 E+00 </td></tr><tr><td> A: </td><td> 1.8456E-02 </td><td> -1.3366E-01 </td><td> - 1.8491E-01 </td><td> -1.1020E-02 </td><td> -1.6041E-01 </td><td> -8.4559E-02 </td></tr><tr ><td> B: </td><td> -1.0364E-01 </td><td> 3.3693E-01 </td><td> 3.5028E-01 </td><td> 3.4179E- 01 </td><td> -8.1879E-02 </td><td> 5.0537E-02 </td></tr><tr><td> C: </td><td> 4.5838E- 01 </td><td> -1.4034E+00 </td><td> -2.9639E-01 </td><td> -9.5536E-01 </td><td> 1.1847E-01 </ Td><td> -4.8834E-01 </td></tr><tr><td> D: </td><td> -1.1063E+00 </td><td> 4.3167E+00 < /td><td> 3.6460E-01 </td><td> 3.0478E+00 </td><td> -4.6313E-01 </td><td> 1.2425E+00 </td></ Tr><tr><td> E: </td><td> 1.4314E+00 </td><td> -7.9455E+00 </td><td> -1.1263E+00 </td><td> -5.9263E+00 </td><td> 1.1656E+ 00 </td><td> -1.5340E+00 </td></tr><tr><td> F: </td><td> -9.6001E-01 </td><td> 7.5364E +00 </td><td> 1.7259E+00 </td><td> 6.0032E+00 </td><td> -1.8689E+00 </td><td> 9.4117E-01 </td ></tr><tr><td> G: </td><td> 2.3708E-01 </td><td> -2.8720E+00 </td><td> -9.0811E-01 </ Td><td> -2.2223E+00 </td><td> 1.3601E+00 </td><td> -1.9481E-01 </td></tr><tr><td> Surface </ Td><td> 9 </td><td> 10 </td><td> 11 </td><td> 12 </td><td> 13 </td><td> 14 </td> </tr><tr><td> K: </td><td> -3.8492E+00 </td><td> -8.1860E-01 </td><td> -1.0326E+01 </ Td><td> -9.6924E+00 </td><td> -3.8076E-02 </td><td> -8.2970E+04 </td></tr><tr><td> A: </td><td> 5.3620E-02 </td><td> 6.6518E-02 </td><td> -8.5750E-02 </td><td> 6.5469E-03 </td>< Td> 1.0197E-01 </td><td> 2.9142E-02 </td></tr><tr><td> B: </td><td> -3.1810E-01 </td>< Td> -7.0297E-02 </td><td> -6.4731E-02 </td><td> -1.9336E-01 </td><td> -2.2577E-01 </td><td> -1.1730E-01 </td></tr><tr><td> C: </td><td> 5.5834E-01 </td><td> 1.2388E-01 </td><td> 9.1308E-02 </td><td> 1.9941E-01 </td> <td> 1.6223E-01 </td><td> 8.4428E-02 </td></tr><tr><td> D: </td><td> -2.9473E-01 </td> <td> -3.6020E-02 </td><td> -6.8868E-02 </td><td> -1.3123E-01 </td><td> -5.4690E-02 </td><td > -2.9048E-02 </td></tr><tr><td> E: </td><td> -6.1125E-02 </td><td> -1.0475E-02 </td> <td> 2.1713E-02 </td><td> 5.1045E-02 </td><td> 9.9586E-03 </td><td> 5.2327E-03 </td></tr><tr ><td> F: </td><td> 1.1268E-01 </td><td> 3.8370E-03 </td><td> -1.3723E-03 </td><td> -1.0270E -02 </td><td> -9.5227E-04 </td><td> -4.7375E-04 </td></tr><tr><td> G: </td><td> - 3.2276E-02 </td><td> 4.5103E-06 </td><td> -2.5691E-04 </td><td> 8.2612E-04 </td><td> 3.7854E-05 < /td><td> 1.7039E-05 </td></tr></TBODY></TABLE>

In the second embodiment, the aspherical curve equation represents the form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and are not described herein.

With Table 3 and Table 4, the following data can be derived:

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> Second embodiment</td></tr><tr><td> f[mm ] </td><td> 3.88 </td><td> f23/f45 </td><td> -4.24 </td></tr><tr><td> Fno </td><td> 2.0 </td><td> f12/f34 </td><td> -0.05 </td></tr><tr><td> FOV[deg.] </td><td> 79 </td ><td> f34/f56 </td><td> -3.15 </td></tr><tr><td> f1/f2 </td><td> -0.47 </td><td> f45 /f6 </td><td> -2.15 </td></tr><tr><td> f2/f3 </td><td> -0.79 </td><td> f1/f234 </td ><td> -0.48 </td></tr><tr><td> f3/f4 </td><td> -1.05 </td><td> f234/f5 </td><td> - 1.27 </td></tr><tr><td> f4/f5 </td><td> -1.59 </td><td> f234/f56 </td><td> -0.23 </td> </tr><tr><td> f5/f6 </td><td> -1.01 </td><td> f123/f4 </td><td> -0.44 </td></tr>< Tr><td> f1/f3 </td><td> 0.37 </td><td> f123/f45 </td><td> 0.33 </td></tr><tr><td> f2/ F4 </td><td> 0.83 </td><td> f123/f456 </td><td> -0.39 </td></tr><tr><td> f3/f5 </td>< Td> 1.66 </td><td> V1-V2 </td><td> 34.5 </td></tr><tr><td> f4/f6 </td><td> 1.61 </td> <td> V3-V4 </td><td> 34.5 </td></tr><tr><td> f1/f23 </ Td><td> -0.07 </td><td> f/TL </td><td> 0.85 </td></tr><tr><td> f23/f4 </td><td> 5.66 </td><td> </td><td> </td></tr></TBODY></TABLE>

The six-piece imaging lens set provided by the invention can be made of plastic or glass. When the lens material is plastic, the production cost can be effectively reduced. When the lens is made of glass, the six-piece imaging lens set can be increased. The freedom of force configuration. In addition, the object side surface and the image side surface of the lens in the six-piece imaging lens group may be aspherical, and the aspheric surface can be easily formed into a shape other than the spherical surface, and more control variables are obtained to reduce the aberration and thereby reduce the lens. The number used, therefore, can effectively reduce the overall length of the six-piece imaging lens set of the present invention.

In the six-piece imaging lens set provided by the present invention, if the lens surface is convex and the convex surface is not defined, the lens surface is convex at the near optical axis; When the lens surface is concave and the concave position is not defined, it indicates that the lens surface is concave at the near optical axis.

The six-piece imaging lens set provided by the invention is more suitable for the optical system of moving focus, and has the characteristics of excellent aberration correction and good imaging quality, and can be applied to 3D (three-dimensional) image capturing and digital in various aspects. In electronic imaging systems such as cameras, mobile devices, digital tablets or car photography.

In the above, the above embodiments and drawings are only the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, that is, the equivalent changes and modifications made by the scope of the present invention are all It should be within the scope of the patent of the present invention.

100, 200, 300‧ ‧ aperture
110, 210, 310‧‧‧ first lens
111, 211, 311‧‧‧ ‧ side surface
112, 212, 312‧‧‧ side surface
120, 220, 320‧‧‧ second lens
121, 221, 321‧‧‧ ‧ side surface
122, 222, 322‧‧‧ image side surface
130, 230, 330‧‧‧ third lens
131, 231, 331‧‧‧ ‧ side surface
132, 232, 332‧‧‧ image side surface
140, 240, 340‧ ‧ fourth lens
141, 241, 341‧‧‧ ‧ side surface
142, 242, 342‧‧‧ image side surface
150, 250, 350‧‧‧ fifth lens
151, 251, 351‧‧‧ ‧ side surface
152, 252, 352‧‧‧ side surface
160, 260, 360‧‧‧ sixth lens
161, 261, 361‧‧ ‧ side surface
162, 262, 362‧‧‧ side surface
170, 270, 370‧‧‧ Infrared filtering filter elements
180, 280, 380‧‧ ‧ imaging surface
190, 290, 390‧‧‧ optical axis
f‧‧‧Focus of the six-piece imaging lens set
Aperture value of Fno‧‧‧ six-piece imaging lens set
Maximum field of view in the FOV‧‧‧ six-piece imaging lens set
F1‧‧‧The focal length of the first lens
F2‧‧‧The focal length of the second lens
f3‧‧‧The focal length of the third lens
F4‧‧‧The focal length of the fourth lens
f5‧‧‧Focus of the fifth lens
F6‧‧‧The focal length of the sixth lens
F12‧‧‧Combined focal length of the first lens and the second lens
F23‧‧‧Combined focal length of the second lens and the third lens
F34‧‧‧Combined focal length of the third lens and the fourth lens
F45‧‧‧Combined focal length of the fourth lens and the fifth lens
f56‧‧‧Combined focal length of the fifth lens and the sixth lens
F123‧‧‧Combined focal length of the first lens, the second lens and the third lens
f234‧‧‧Combined focal length of the second lens, the third lens and the fourth lens
f456‧‧‧Combined focal length of the fourth lens, the fifth lens and the sixth lens
V1‧‧‧Dispersion coefficient of the first lens
V2‧‧‧Dispersion coefficient of the second lens
V3‧‧‧Dispersion coefficient of the third lens
V4‧‧‧Dispersion coefficient of the fourth lens
TL‧‧‧The distance from the object side surface of the first lens to the imaging surface on the optical axis

1A is a schematic view of a six-piece imaging lens set of a first embodiment of the present invention. Fig. 1B is a graph showing the curvature of field and the distortion of the distortion of the six-piece imaging lens group of the first embodiment from left to right. 2A is a schematic view of a six-piece imaging lens set of a second embodiment of the present invention. 2B is a graph showing the curvature of field and the distortion of the distortion of the six-piece imaging lens group of the second embodiment from left to right.

100‧‧‧ aperture

110‧‧‧first lens

111‧‧‧Side side surface

112‧‧‧ image side surface

120‧‧‧second lens

121‧‧‧Side side surface

122‧‧‧ image side surface

130‧‧‧ third lens

131‧‧‧ object side surface

132‧‧‧Image side surface

140‧‧‧Fourth lens

141‧‧‧ object side surface

142‧‧‧ image side surface

150‧‧‧ fifth lens

151‧‧‧ object side surface

152‧‧‧ image side surface

160‧‧‧ sixth lens

161‧‧‧ object side surface

162‧‧‧ image side surface

170‧‧‧Infrared filter components

180‧‧‧ imaging surface

190‧‧‧ optical axis

Claims (24)

A six-piece imaging lens set comprising: an aperture from the object side to the image side; a first lens having a positive refractive power, the object side surface being convex at the near optical axis, and the image side surface being near the optical axis a concave surface, at least one surface of the object side surface and the image side surface is aspherical; a second lens has a negative refractive power, and the object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. At least one surface of the object side surface and the image side surface is aspherical; a third lens has a positive refractive power, and the object side surface is convex at the near optical axis, and the image side surface is convex at the near optical axis, and the object side thereof At least one surface of the surface and the image side surface is aspherical; a fourth lens has a negative refractive power, and the object side surface is concave at the near optical axis, and the image side surface is convex at the near optical axis, and the object side surface and image thereof At least one surface of the side surface is aspherical; a fifth lens has a positive refractive power, and the object side surface is convex at a near optical axis, and the image side surface is concave at a near optical axis, and the object side surface and the image side surface are at least One surface is aspherical; a sixth lens has negative refractive power The object side surface has a concave surface at a near optical axis, and the image side surface has a convex surface at a near optical axis, and at least one surface of the object side surface and the image side surface is aspherical, and at least one surface of the object side surface and the image side surface has at least one surface. An inflection point; wherein the focal length of the third lens is f3, the focal length of the fourth lens is f4, and the following condition is satisfied: -1.3 < f3 / f4 < -0.7. The six-piece imaging lens set according to claim 1, wherein the focal length of the first lens is f1, the focal length of the second lens is f2, and the following condition is satisfied: -0.7 < f1/f2 < -0.3. The six-piece imaging lens set according to claim 1, wherein the second lens has a focal length of f2, the third lens has a focal length of f3, and satisfies the following condition: -1.0 < f2 / f3 < -0.6. The six-piece imaging lens set according to claim 1, wherein the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, and the following condition is satisfied: -1.9 < f4 / f5 < -1.3. The six-piece imaging lens set according to claim 1, wherein the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, and the following condition is satisfied: -1.4 < f5 / f6 < -0.7. The six-piece imaging lens set according to claim 1, wherein the focal length of the first lens is f1, the focal length of the third lens is f3, and the following condition is satisfied: 0.2 < f1/f3 < 0.6. The six-piece imaging lens set according to claim 1, wherein the second lens has a focal length of f2, the fourth lens has a focal length of f4, and satisfies the following condition: 0.6 < f2 / f4 < 1.0. The six-piece imaging lens set according to claim 1, wherein the focal length of the third lens is f3, the focal length of the fifth lens is f5, and the following condition is satisfied: 1.3 < f3 / f5 < 2.0. The six-piece imaging lens set according to claim 1, wherein the focal length of the fourth lens is f4, the focal length of the sixth lens is f6, and the following condition is satisfied: 1.3 < f4 / f6 < 2.0. The six-piece imaging lens set according to claim 1, wherein a focal length of the first lens is f1, a combined focal length of the second lens and the third lens is f23, and the following condition is satisfied: -0.1<f1/f23< -0.03. The six-piece imaging lens set according to claim 1, wherein the combined focal length of the second lens and the third lens is f23, the focal length of the fourth lens is f4, and the following condition is satisfied: 3.0<f23/f4<7.0 . The six-piece imaging lens set according to claim 1, wherein the combined focal length of the second lens and the third lens is f23, and the combined focal length of the fourth lens and the fifth lens is f45, and the following condition is satisfied: -5.0 <f23/f45<-3.8. The six-piece imaging lens set according to claim 1, wherein the combined focal length of the first lens and the second lens is f12, the combined focal length of the third lens and the fourth lens is f34, and the following condition is satisfied: -0.1 <f12/f34<-0.03. The six-piece imaging lens set according to claim 1, wherein the combined focal length of the third lens and the fourth lens is f34, and the combined focal length of the fifth lens and the sixth lens is f56, and the following conditions are satisfied: - 3.5 <f34/f56<-2.3. The six-piece imaging lens set according to claim 1, wherein the fourth lens and the fifth lens have a combined focal length of f45, the sixth lens has a focal length of f6, and satisfies the following condition: -2.6<f45/f6< -1.3. The six-piece imaging lens set according to claim 1, wherein the focal length of the first lens is f1, and the combined focal length of the second lens, the third lens and the fourth lens is f234, and the following condition is satisfied: -0.7< F1/f234<-0.3. The six-piece imaging lens set according to claim 1, wherein the second lens, the third lens and the fourth lens have a combined focal length of f234, and the fifth lens has a focal length of f5 and satisfies the following condition: -1.6< F234/f5<-1.0. The six-piece imaging lens set according to claim 1, wherein the second lens, the third lens and the fourth lens have a combined focal length of f234, and the fifth lens and the sixth lens have a combined focal length of f56, and satisfy the following Conditions: -0.35 < f234 / f56 < -0.05. The six-piece imaging lens set according to claim 1, wherein the first lens, the second lens and the third lens have a combined focal length of f123, the fourth lens has a focal length of f4, and satisfies the following condition: -0.6< F123/f4<-0.2. The six-piece imaging lens set according to claim 1, wherein the first lens, the second lens and the third lens have a combined focal length of f123, and the fourth lens and the fifth lens have a combined focal length of f45, and satisfy the following Condition: 0.15 < f123 / f45 < 0.5. The six-piece imaging lens set according to claim 1, wherein the first lens, the second lens and the third lens have a combined focal length of f123, and the fourth lens, the fifth lens and the sixth lens have a combined focal length of f456. And meet the following conditions: -0.6 <f123/f456 <-0.2. The six-piece imaging lens set according to claim 1, wherein the first lens has a dispersion coefficient of V1, the second lens has a dispersion coefficient of V2, and satisfies the following condition: 30 < V1 - V2 < 42. The six-piece imaging lens set according to claim 1, wherein the third lens has a dispersion coefficient of V3, the fourth lens has a dispersion coefficient of V4, and satisfies the following condition: 30<V3-V4<42. The six-piece imaging lens set according to claim 1, wherein the overall focal length of the six-piece imaging lens group is f, the distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, and satisfies The following conditions were: 0.6 < f / TL < 0.95.