TWI634363B - Five-piece optical lens system - Google Patents

Abstract

The invention is a five-piece imaging lens set comprising: an aperture from the object side to the image side; a first lens having a positive refractive power; a second lens having a negative refractive power; and a third lens having a third lens Negative refractive power; a fourth lens having a negative refractive power; and a fifth lens having a positive refractive power. Accordingly, the present invention provides a five-piece imaging lens set that can be applied to a portable electronic product without making the total length of the lens too long, while having a long focal length, a high pixel, and a low lens height.

Description

Five-piece imaging lens set

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

The high-quality small photographic lens is the standard equipment of various mobile devices. With the advancement of semiconductor manufacturing, the pixel area on the electronic photosensitive element is getting smaller and smaller, which makes the camera lens need more detailed analysis. Force, in order to present a more detailed picture quality.

Miniaturized photographic lenses mounted on portable electronic products are mainly made up of four-piece lens structures. However, due to the trend of thinner, higher-performance, high-definition electronic products such as mobile phone cameras, photosensitive elements The area of the pixels is gradually reduced, and the conventional four-piece lens set will not be able to meet the higher-order photographic lens module in the case of increasing system imaging quality requirements.

Therefore, how to develop an imaging lens set that can solve the above drawbacks is the motivation for the development of the present invention.

The object of the present invention is to provide a five-piece imaging lens set, in particular to a portable electronic product, which does not have a long total lens length, and has a long focal length, a high pixel and a low lens height. Five-piece imaging lens set.

In order to achieve the foregoing objective, a five-piece imaging lens set according to the present invention includes, 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 convex, 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 convex at the near optical axis, and the image side surface is near the optical axis a concave surface, at least one surface of the object side surface and the image side surface is aspherical; a third lens having a negative refractive power, the object side surface being convex at the near optical axis, and the image side surface being concave at the near optical axis, 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 surface is concave at the near optical axis, and the object side thereof At least one surface of the surface and the image side surface is aspherical; and a fifth lens having a positive refractive power, the image side surface having a convex surface at a near optical axis, and at least one surface of the object side surface and the image side surface being aspherical, At least one surface of the object side surface and the image side surface 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: -0.8 < f1/f2 < -0.5. Thereby, the refractive power arrangement of the first lens and the second lens is suitable, which can be beneficial to reduce 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: 0.005 < f2 / f3 < 0.35. Thereby, the arrangement of the refractive power of the second lens and the third lens is balanced, which contributes to the correction of the aberration and the reduction of the sensitivity.

Preferably, wherein the third lens has a focal length of f3, the fourth lens has a focal length of f4, and satisfies the following condition: 2.5 < f3/f4 < 43. Thereby, the total optical length of the system is effectively reduced.

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: -0.7 < f4/f5 < -0.2. Thereby, the refractive power arrangement of the rear group lens system can be balanced, which is beneficial to the reduction of system sensitivity and the correction of high-order 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: -0.25 < f1/f3 < -0.005. Thereby, the refractive power of the first lens is effectively distributed, and the sensitivity of the five-piece imaging lens group is reduced.

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: 0.5 < f2/f4 < 1.0. Therefore, the system's negative refractive power distribution is more suitable, which is beneficial to correct system aberrations to improve the imaging quality of the system.

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: -23 < f3 / f5 < -1.4. Thereby, it is helpful to shorten the total length of the five-piece imaging lens group and maintain its miniaturization.

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: -0.95 < f1/f23 < -0.55. Thereby, when f1/f23 satisfies the above conditions, the resolution capability of the five-piece imaging lens group can be significantly improved.

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: 0.15 <f23/f45 < 0.65. When f23/f45 satisfies the foregoing relationship, the five-piece imaging lens group can have a high pixel and a low lens height, and the resolution capability is remarkably improved. Otherwise, if the optical data value range is exceeded, This leads to problems such as low performance, low resolution, and insufficient yield of the five-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: -1.5 < f12/f34 < -0.7. Thereby, the curvature of field can be effectively corrected.

Preferably, wherein the third lens and the fourth lens have a combined focal length of f34, the fifth lens has a focal length of f5, and satisfies the following condition: -0.65 < f34/f5 < -0.15. When f34/f5 satisfies the foregoing relationship, the five-piece imaging lens group can have high pixel and low lens height, and the resolution capability is significantly improved. On the contrary, if the optical data value range is exceeded, This leads to problems such as low performance, low resolution, and insufficient yield of the five-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: -1.8 < f1/f234 < -1.3. 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: -0.3 < f234/f5 < -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: -1.2 < f123/f4 < -0.75. 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 and the fifth lens have a combined focal length of f45, and satisfy the following condition: -0.8< f123/f45 < - 0.25. By proper configuration of the refractive power, it helps to reduce the occurrence of spherical aberration and astigmatism.

Preferably, wherein the second lens has a dispersion coefficient of V2, the third lens has a dispersion coefficient of V3, and satisfies the following condition: 30 < V3-V2 < 42. Thereby, the chromatic aberration of the five-piece imaging lens group is effectively reduced.

Preferably, wherein the fourth lens has a dispersion coefficient of V4, the fifth lens has a dispersion coefficient of V5, and satisfies the following condition: 30 < V4-V5<42. Thereby, the chromatic aberration of the five-piece imaging lens group is effectively reduced.

Preferably, wherein the overall focal length of the five-piece imaging lens group is f, the distance from the object side surface of the first lens to the imaging plane on the optical axis is TL, and the following condition is satisfied: 0.95 < f / TL < 1.3 . Thereby, it is advantageous to maintain the miniaturization of the five-piece imaging lens group to be mounted on a thin and light electronic product.

Preferably, wherein the focal length of the first lens is f1, the combined focal length of the second lens, the third lens, the fourth lens and the fifth lens is f2345, and the following condition is satisfied: -1.5 < f1/f2345 < -0.75 . Therefore, when f1/f2345 satisfies the foregoing relationship, the resolution capability of the five-piece imaging lens group can be significantly improved. Conversely, if the optical data value range is exceeded, the five-piece imaging lens group is caused. Performance, low resolution, and insufficient yield.

With regard to the techniques, means, and other effects of the present invention in order to achieve the above objects, three preferred embodiments are described in detail with reference to the drawings.

<First Embodiment>

1A and FIG. 1B, FIG. 1A is a schematic diagram of a five-piece imaging lens set according to a first embodiment of the present invention, and FIG. 1B is a left-to-right sequential five-piece imaging lens set of the first embodiment. Image curvature and distortion curve. As can be seen from FIG. 1A, the five-piece imaging lens assembly includes an aperture 100 and an optical group including the first lens 110, the second lens 120, the third lens 130, and the fourth from the object side to the image side. The lens 140, the fifth lens 150, the infrared filter element 170, and the imaging surface 180, wherein the five-piece imaging lens group has five refractive lenses. The aperture 100 is disposed between the object side surface 111 and the image side surface 112 of the first lens 110.

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 convex 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 negative 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 concave 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 concave 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 convex at the near optical axis 190, and the object side surface 151 and the image side are The surface 152 is aspherical, and at least one surface of the object side surface 151 and the image side surface 152 has at least one inflection point.

The infrared filter element 170 is made of glass and disposed between the fifth lens 150 and the imaging surface 180 without affecting the focal length of the five-piece imaging lens set.

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

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td width="122" height="3"></td></tr><tr> <td></td><td><img wi="485" he="48" 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 five-piece imaging lens group of the first embodiment, the focal length of the five-piece imaging lens group is f, the aperture value (f-number) of the five-piece imaging lens group is Fno, and the maximum magnification of the five-piece imaging lens group. The field angle (arrow angle) is FOV and its values are as follows: f = 6.180 (mm); Fno = 2.4; and FOV = 47.4 (degrees).

In the five-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 = -0.606.

In the five-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 = 0.278.

In the five-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 = 3.115.

In the five-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 = -0.552.

In the five-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 = -0.168.

In the five-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 = 0.866.

In the five-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 = -1.718.

In the five-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 = -0.796 .

In the five-piece imaging lens set of the first embodiment, the combined 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 = 0.277.

In the five-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 = -1.255.

In the five-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 focal length of the fifth lens 150 is f5, and the following conditions are satisfied: f34/f5 = -0.390 .

In the five-piece imaging lens set of the first embodiment, the focal length of the first lens 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 satisfied: f1/ F234 = -1.623.

In the five-piece imaging lens set of the first embodiment, the combined 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 = -0.178.

In the five-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 = -1.051.

In the five-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 the following conditions are met: f123/f45 = -0.442.

In the five-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 first lens 110, the second lens 120, the third lens 130, and the fourth lens 140 is f1234, and The following conditions are met: f1/f2345 = -1.121.

In the five-piece imaging lens group of the first embodiment, the second lens 120 has a dispersion coefficient of V2, and the third lens 130 has a dispersion coefficient of V3 and satisfies the following condition: V3-V2 = 34.60.

In the five-piece imaging lens group of the first embodiment, the fourth lens 140 has a dispersion coefficient of V4, and the fifth lens 150 has a dispersion coefficient of V5 and satisfies the following condition: V4-V5 = 34.60.

In the five-piece imaging lens group of the first embodiment, the overall focal length of the five-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 = 1.120.

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) =6.180 mm (mm), Fno (aperture value) = 2.4, FOV (arrow angle) = 47.4 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> 0.561 </td> <td> </td><td> </td><td> </td><td> </td></tr><tr><td> 2 </td><td> aperture</td ><td> Unlimited</td><td> </td><td> -0.561 </td><td> </td><td> </td><td> </td><td> < /td></tr><tr><td> 3 </td><td> First lens</td><td> 1.484 </td><td> (ASP) </td><td> 0.939 </td><td> Plastic</td><td> 1.544 </td><td> 56.0 </td><td> 2.63 </td></tr><tr><td> 4 </td ><td> </td><td> -36.699 </td><td> (ASP) </td><td> 0.050 </td><td> </ Td><td> </td><td> </td><td> </td></tr><tr><td> 5 </td><td> second lens</td><td > 6.689 </td><td> (ASP) </td><td> 0.250 </td><td> Plastic </td><td> 1.650 </td><td> 21.4 </td><td > -4.34 </td></tr><tr><td> 6 </td><td> </td><td> 1.972 </td><td> (ASP) </td><td> 0.385 </td><td> </td><td> </td><td> </td><td> </td></tr><tr><td> 7 </td><td > Third lens</td><td> 16.817 </td><td> (ASP) </td><td> 0.250 </td><td> Plastic </td><td> 1.544 </td> <td> 56.0 </td><td> -15.63 </td></tr><tr><td> 8 </td><td> </td><td> 5.634 </td><td> (ASP) </td><td> 1.441 </td><td> </td><td> </td><td> </td><td> </td></tr><tr> <td> 9 </td><td> Fourth lens</td><td> -6.643 </td><td> (ASP) </td><td> 0.300 </td><td> Plastic< /td><td> 1.544 </td><td> 56.0 </td><td> -5.02 </td></tr><tr><td> 10 </td><td> </td> <td> 4.743 </td><td> (ASP) </td><td> 0.043 </td><td> </td><td> </td><td> </td><td> </td></tr><tr><td> 11 </td><td> Fifth lens</td><td> 9.583 </td><td> (ASP) </td><td> 0.574 </td><td> plastic </td><td> 1.650 </td><td> 21.4 </td><td> 9.10 </td></tr><tr><td> 12 </td><td> </td> <td> -15.534 </td><td> (ASP) </td><td> 0.969 </td><td> </td><td> </td><td> </td><td > </td></tr><tr><td> 13 </td><td> Infrared Filter Filter </td><td> Unlimited</td><td> 0.210 </td>< Td> glass</td><td> 1.517 </td><td> 64.2 </td><td> </td></tr><tr><td> 14 </td><td> </ Td><td> infinity</td><td> 0.110 </td><td> </td><td> </td><td> </td><td> </td></tr> <tr><td> 15 </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> plane</td><td> 3 </td><td> 4 </td><td> 5 </td><td > 6 </td><td> 7 </td></tr><tr><td> K: </td><td> -2.7258E-01 </td><td> -1.2181E+02 </td><td> 3.2653E+01 </td><td> 4.1323E-01 </td><td> 5.8732E+01 </td></tr><tr><td> A: < /td><td> 9.6900E-03 </td><td> 2.5479E-02 </td><td> -3.4632E-02 </td><td> -1.7749E-02 </td>< Td> 6.2262E-02 </td></tr><tr><td> B: </td><td> -1.9630E-03 </td><td> 2.6095E-02 </td>< Td> 1.1854E-01 </td><td> 2.0564E-01 </td><td> 1.0002E-01 </td></tr><tr><td> C: </td><td > 1.1662E-02 </td><td> -4.8901E-02 </td><td> -1.1997E-01 </td><td> -1.1342E-01 </td><td> 5.0712E -02 </td></tr><tr><td> D: </td><td> -1.0429E-02 </td><td> 4.3057E-02 </td><td> 1.0446E -01 </td><td> 3.0625E-01 </td><td> 1.6840E-02 </td></tr><tr><td> E: </td><td> 3.9140E- 03 </td><td> -1.4179E-02 </td><td> -5.0818E-02 </td><td> -1.0679E-01 </td><td> -1.7920E-02 < /td></tr><tr><td> plane </td><td> 8 </td><td> 9 </td><td> 10 </td><td> 11 </td><td> 12 </td></tr><tr ><td> K: </td><td> -1.9267E+02 </td><td> 5.5088E+00 </td><td> -2.6042E+01 </td><td> 1.3440E +01 </td><td> -2.0000E+02 </td></tr><tr><td> A: </td><td> 2.2381E-01 </td><td> -1.3701 E-01 </td><td> -1.0567E-01 </td><td> -5.7050E-02 </td><td> -6.1690E-02 </td></tr><tr> <td> B: </td><td> -1.9331E-01 </td><td> 1.6850E-03 </td><td> 5.8640E-03 </td><td> 3.6755E-02 </td><td> 3.9578E-02 </td></tr><tr><td> C: </td><td> 4.9217E-01 </td><td> 1.4601E-02 < /td><td> 7.1010E-03 </td><td> -1.2057E-02 </td><td> -1.1358E-02 </td></tr><tr><td> D: </td><td> -5.0784E-01 </td><td> -8.8490E-03 </td><td> -3.1030E-03 </td><td> 1.8290E-03 </td ><td> 1.4870E-03 </td></tr><tr><td> E: </td><td> 2.6197E-01 </td><td> 2.9910E-03 </td> <td> 3.0500E-04 </td><td> -1.2100E-04 </td><td> -8.2000E-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 0-15 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, G, ... are high-order aspheric coefficients. In addition, the tables in the following embodiments correspond to the schematic diagrams of the respective embodiments and the curvature of field and the distortion diagram of the distortion, and the definitions of the data in the table are the same as those of Tables 1 and 2 of the first embodiment, and Add a statement.

<Second embodiment>

2A and 2B, wherein FIG. 2A is a schematic diagram of a five-piece imaging lens set according to a second embodiment of the present invention, and FIG. 2B is a five-piece imaging lens set of the second embodiment from left to right. Image curvature and distortion curve. As can be seen from FIG. 2A, the five-piece imaging lens assembly includes an aperture 200 and an optical group including the first lens 210, the second lens 220, the third lens 230, and the fourth from the object side to the image side. The lens 240, the fifth lens 250, the infrared filter element 270, and the imaging surface 280, wherein the five-piece imaging lens group has five lenses with refractive power. The aperture 200 is disposed between the object side surface 211 and the image side surface 212 of the first lens 210.

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 convex 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 negative 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 concave 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 concave 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 convex at the near optical axis 290, and the object side surface 251 and the image side are The surface 252 is aspherical, and at least one surface of the object side surface 251 and the image side surface 252 has 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 five-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(uu)<fo>focal length=6.540 mm (mm), Fno (aperture value) = 2.6, FOV (painting angle) = 48 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> 0.611 </td> <td> </td><td> </td><td> </td><td> </td></tr><tr><td> 2 </td><td> aperture</td ><td> Unlimited</td><td> </td><td> -0.611 </td><td> </td><td> </td><td> </td><td> < /td></tr><tr><td> 3 </td><td> First lens</td><td> 1.567 </td><td> (ASP) </td><td> 1.001 </td><td> Plastic</td><td> 1.544 </td><td> 56.0 </td><td> 2.85 </td></tr><tr><td> 4 </td ><td> </td><td> -229.413 </td><td> (ASP) </td><td> 0.055 </td><td> </t d><td> </td><td> </td><td> </td></tr><tr><td> 5 </td><td> second lens</td><td > 7.291 </td><td> (ASP) </td><td> 0.273 </td><td> Plastic</td><td> 1.650 </td><td> 21.4 </td><td > -4.60 </td></tr><tr><td> 6 </td><td> </td><td> 2.106 </td><td> (ASP) </td><td> 0.412 </td><td> </td><td> </td><td> </td><td> </td></tr><tr><td> 7 </td><td > Third lens</td><td> 17.396 </td><td> (ASP) </td><td> 0.273 </td><td> Plastic </td><td> 1.544 </td> <td> 56.0 </td><td> -21.79 </td></tr><tr><td> 8 </td><td> </td><td> 7.030 </td><td> (ASP) </td><td> 1.520 </td><td> </td><td> </td><td> </td><td> </td></tr><tr> <td> 9 </td><td> Fourth lens</td><td> -7.614 </td><td> (ASP) </td><td> 0.327 </td><td> Plastic< /td><td> 1.544 </td><td> 56.0 </td><td> -5.48 </td></tr><tr><td> 10 </td><td> </td> <td> 5.003 </td><td> (ASP) </td><td> 0.049 </td><td> </td><td> </td><td> </td><td> </td></tr><tr><td> 11 </td><td> Fifth lens</td><td> 10.837 </td><td> (ASP) </td><td> 0.640 </td><td> plastic </td><td> 1.650 </td><td> 21.4 </td><td> 10.43 </td></tr><tr><td> 12 </td><td> </td> <td> -18.250 </td><td> (ASP) </td><td> 0.988 </td><td> </td><td> </td><td> </td><td > </td></tr><tr><td> 13 </td><td> Infrared Filter Filter </td><td> Unlimited</td><td> 0.210 </td>< Td> glass</td><td> 1.517 </td><td> 64.2 </td><td> </td></tr><tr><td> 14 </td><td> </ Td><td> infinity</td><td> 0.130 </td><td> </td><td> </td><td> </td><td> </td></tr> <tr><td> 15 </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> plane</td><td> 3 </td><td> 4 </td><td> 5 </td><td > 6 </td><td> 7 </td></tr><tr><td> K: </td><td> -2.4773E-01 </td><td> -1.2181E+02 </td><td> 3.1644E+01 </td><td> 4.7509E-01 </td><td> 5.8732E+01 </td></tr><tr><td> A: < /td><td> 7.7600E-03 </td><td> 1.8827E-02 </td><td> -3.0864E-02 </td><td> -1.9836E-02 </td>< Td> 3.1381E-02 </td></tr><tr><td> B: </td><td> -1.3920E-03 </td><td> 3.5652E-02 </td>< Td> 1.0720E-01 </td><td> 1.5060E-01 </td><td> 7.9920E-02 </td></tr><tr><td> C: </td><td > 8.4330E-03 </td><td> -6.5454E-02 </td><td> -1.3589E-01 </td><td> -9.2884E-02 </td><td> -1.2464 E-02 </td></tr><tr><td> D: </td><td> -6.5180E-03 </td><td> 5.2708E-02 </td><td> 1.1564 E-01 </td><td> 1.4844E-01 </td><td> 5.2166E-02 </td></tr><tr><td> E: </td><td> 2.1810E -03 </td><td> -1.5311E-02 </td><td> -4.2084E-02 </td><td> -6.6510E-03 </td><td> -2.0777E-02 </td></tr><tr><td> flat </td><td> 8 </td><td> 9 </td><td> 10 </td><td> 11 </td><td> 12 </td></tr><tr ><td> K: </td><td> -1.9267E+02 </td><td> 5.5088E+00 </td><td> -1.6540E+01 </td><td> 1.3440E +01 </td><td> -2.0000E+02 </td></tr><tr><td> A: </td><td> 1.3525E-01 </td><td> -1.0722 E-01 </td><td> -8.5724E-02 </td><td> -4.6930E-02 </td><td> -5.3278E-02 </td></tr><tr> <td> B: </td><td> -4.8212E-02 </td><td> 7.5210E-03 </td><td> 2.1880E-03 </td><td> 2.7003E-02 </td><td> 3.0552E-02 </td></tr><tr><td> C: </td><td> 1.4924E-01 </td><td> -4.6470E-03 </td><td> 4.2170E-03 </td><td> -7.3300E-03 </td><td> -7.2850E-03 </td></tr><tr><td> D : </td><td> -1.3116E-01 </td><td> 3.7870E-03 </td><td> -1.3260E-03 </td><td> 9.0800E-04 </td ><td> 7.7800E-04 </td></tr><tr><td> E: </td><td> 6.2980E-02 </td><td> -3.0900E-04 </td ><td> 1.0000E-04 </td><td> -4.7000E-05 </td><td> -3.3000E-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> 6.540 </td><td> f23/f45 </td><td> 0.304 </td></tr><tr><td> Fno </td><td> 2.6 </td><td> f12/f34 </td><td> -1.181 </td></tr><tr><td> FOV[deg.] </td><td> 48 </td> <td> f34/f5 </td><td> -0.397 </td></tr><tr><td> f1/f2 </td><td> -0.620 </td><td> f1/ F234 </td><td> -1.577 </td></tr><tr><td> f2/f3 </td><td> 0.211 </td><td> f234/f5 </td>< Td> -0.173 </td></tr><tr><td> f3/f4 </td><td> 3.980 </td><td> f123/f4 </td><td> -1.017 </ Td></tr><tr><td> f4/f5 </td><td> -0.525 </td><td> f123/f45 </td><td> -0.456 </td></tr ><tr><td> f1/f3 </td><td> -0.131 </td><td> f1/f2345 </td><td> -1.111 </td></tr><tr>< Td> f2/f4 </td><td> 0.840 </td><td> V3-V2 </td><td> 34.600 </td></tr><tr><td> f3/f5 </ Td><td> -2.089 </td><td> V4-V5 </td><td> 34.600 </td></tr><tr><td> f1/f23 </td><td> - 0.769 </td><td> f/TL </td><td> 1.113 </td></tr></TBODY></TABLE>

<Third embodiment>

Please refer to FIG. 3A and FIG. 3B , wherein FIG. 3A is a schematic diagram of a five-piece imaging lens set according to a third embodiment of the present invention, and FIG. 3B is a five-piece imaging lens set of the third embodiment from left to right. Image curvature and distortion curve. As can be seen from FIG. 3A, the five-piece imaging lens assembly includes an aperture 300 and an optical group including the first lens 310, the second lens 320, the third lens 330, and the fourth from the object side to the image side. The lens 340, the fifth lens 350, the infrared filter element 370, and the imaging surface 380, wherein the five-piece imaging lens group has five refractive lenses. The aperture 300 is disposed between the object side surface 311 and the image side surface 312 of the first lens 310.

The first lens 310 has a positive refractive power and is made of a plastic material. The object side surface 311 is convex at the near optical axis 390, and the image side surface 312 is concave at the near optical axis 390, and the object side surface 311 and the image side are Surfaces 312 are all aspherical.

The second lens 320 has a negative refractive power and is made of a plastic material. The object side surface 321 is convex at the near optical axis 390, and the image side surface 322 is concave at the near optical axis 390, and the object side surface 321 and the image side are Surfaces 322 are all aspherical.

The third lens 330 has a negative refractive power and is made of a plastic material. The object side surface 331 is convex at the near optical axis 390, and the image side surface 332 is concave at the near optical axis 390, and the object side surface 331 and the image side are Surface 332 is aspherical.

The fourth lens 340 has a negative refractive power and is made of a plastic material. The object side surface 341 is concave at the near optical axis 390, and the image side surface 342 is concave at the near optical axis 390, and the object side surface 341 and the image side are Surfaces 342 are all aspherical.

The fifth lens 350 has a positive refractive power and is made of a plastic material. The object side surface 351 is convex at the near optical axis 390, and the image side surface 352 is concave at the near optical axis 390, and the object side surface 351 and the image side are The surface 352 is aspherical, and at least one surface of the object side surface 351 and the image side surface 352 has at least one inflection point.

Refer to Table 5 and Table 6 below for reference.

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td><b>Table 5</b></td></tr><tr>< Td> Third embodiment </td></tr><tr><td><u>f(uu)<5.9> focal length) = 5.970 mm (mm), Fno (aperture value) = 2.6, FOV (painting angle) = 49 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> 0.500 </td> <td> </td><td> </td><td> </td><td> </td></tr><tr><td> 2 </td><td> aperture</td ><td> Unlimited</td><td> </td><td> -0.500 </td><td> </td><td> </td><td> </td><td> < /td></tr><tr><td> 3 </td><td> First lens</td><td> 1.477 </td><td> (ASP) </td><td> 0.808 </td><td> Plastic</td><td> 1.544 </td><td> 56.0 </td><td> 2.74 </td></tr><tr><td> 4 </td ><td> </td><td> 89.481 </td><td> (ASP) </td><td> 0.115 </td><td> </td> <td> </td><td> </td><td> </td></tr><tr><td> 5 </td><td> second lens</td><td> 4.377 </td><td> (ASP) </td><td> 0.250 </td><td> Plastic</td><td> 1.651 </td><td> 21.5 </td><td> - 4.22 </td></tr><tr><td> 6 </td><td> </td><td> 1.657 </td><td> (ASP) </td><td> 0.396 < /td><td> </td><td> </td><td> </td><td> </td></tr><tr><td> 7 </td><td> Three lenses</td><td> 6.254 </td><td> (ASP) </td><td> 0.256 </td><td> plastic</td><td> 1.544 </td><td > 56.0 </td><td> -52.01 </td></tr><tr><td> 8 </td><td> </td><td> 5.051 </td><td> (ASP ) </td><td> 1.569 </td><td> </td><td> </td><td> </td><td> </td></tr><tr><td > 9 </td><td> Fourth lens</td><td> -14.630 </td><td> (ASP) </td><td> 0.250 </td><td> Plastic </td ><td> 1.544 </td><td> 56.0 </td><td> -5.17 </td></tr><tr><td> 10 </td><td> </td><td > 3.513 </td><td> (ASP) </td><td> 0.100 </td><td> </td><td> </td><td> </td><td> </ Td></tr><tr><td> 11 </td><td> Fifth lens</td><td> 6.937 </td><td> (ASP) </td><td> 0.672 < /td><td> plastic </td><td> 1.651 </td><td> 21.5 </td><td> 14.96 </td></tr><tr><td> 12 </td><td> </td> <td> -22.727 </td><td> (ASP) </td><td> 0.224 </td><td> </td><td> </td><td> </td><td > </td></tr><tr><td> 13 </td><td> Infrared Filter Filter </td><td> Unlimited</td><td> 0.210 </td>< Td> glass</td><td> 1.517 </td><td> 64.2 </td><td> </td></tr><tr><td> 14 </td><td> </ Td><td> infinity</td><td> 0.500 </td><td> </td><td> </td><td> </td><td> </td></tr> <tr><td> 15 </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 6</b></td></tr><tr>< Td> aspherical coefficient </td></tr><tr><td> plane</td><td> 3 </td><td> 4 </td><td> 5 </td><td > 6 </td><td> 7 </td></tr><tr><td> K: </td><td> 2.9475E-02 </td><td> 4.1916E+01 </ Td><td> 2.4307E+00 </td><td> 1.8319E+00 </td><td> 2.8587E+01 </td></tr><tr><td> A: </td ><td> 1.3660E-03 </td><td> -7.7880E-03 </td><td> -1.5334E-01 </td><td> -1.9948E-01 </td><td > 4.7284E-02 </td></tr><tr><td> B: </td><td> -5.0460E-03 </td><td> 8.1971E-02 </td><td > 3.1971E-01 </td><td> 3.5833E-01 </td><td> 1.2885E-01 </td></tr><tr><td> C: </td><td> 8.7280E-03 </td><td> -9.8522E-02 </td><td> -2.9521E-01 </td><td> -2.7244E-01 </td><td> 3.4842E- 02 </td></tr><tr><td> D: </td><td> -9.1530E-03 </td><td> 6.5827E-02 </td><td> 1.7219E- 01 </td><td> 2.3811E-01 </td><td> -8.4043E-02 </td></tr><tr><td> E: </td><td> 3.5320E- 03 </td><td> -1.8093E-02 </td><td> -5.2703E-02 </td><td> -1.1140E-01 </td><td> 3.3460E-02 </ Td></tr><tr><td> plane </td><td> 8 </td><td> 9 </td><td> 10 </td><td> 11 </td><td> 12 </td></tr><tr ><td> K: </td><td> 5.4576E+00 </td><td> 1.5460E+01 </td><td> -9.5468E+00 </td><td> -1.7856E +02 </td><td> 1.0581E+02 </td></tr><tr><td> A: </td><td> 1.1927E-01 </td><td> -3.1969E -02 </td><td> 1.2095E-02 </td><td> -4.1540E-03 </td><td> -9.7071E-02 </td></tr><tr><td > B: </td><td> 9.4441E-02 </td><td> -9.4155E-02 </td><td> -1.0433E-01 </td><td> -3.1511E-02 </td><td> 3.7355E-02 </td></tr><tr><td> C: </td><td> 4.3197E-02 </td><td> 9.5110E-02 < /td><td> 9.3156E-02 </td><td> 3.6520E-02 </td><td> -9.7740E-03 </td></tr><tr><td> D: < /td><td> -9.3626E-02 </td><td> -4.2540E-02 </td><td> -4.2887E-02 </td><td> -1.8154E-02 </td ><td> 2.9100E-03 </td></tr><tr><td> E: </td><td> 5.7974E-02 </td><td> 1.1256E-02 </td> <td> 1.0781E-02 </td><td> 4.3950E-03 </td><td> -8.9700E-04 </td></tr><tr><td> F </td>< Td> </td><td> -1.6820E-03 </td><td> -1.4000E-03 </td><td> -5.1700E-04 </td><td> 1.4300E-04 < /td></tr><tr><td> G </td><td> </td><td > 1.0753E-04 </td><td> 7.3062E-05 </td><td> 2.3718E-05 </td><td> -8.0463E-06 </td></tr></TBODY ></TABLE>

In the third 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 5 and Table 6, the following data can be derived:

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> Third Embodiment</td></tr><tr><td> f[mm ] </td><td> 5.970 </td><td> f23/f45 </td><td> 0.486 </td></tr><tr><td> Fno </td><td> 2.6 </td><td> f12/f34 </td><td> -1.056 </td></tr><tr><td> FOV[deg.] </td><td> 49 </td> <td> f34/f5 </td><td> -0.309 </td></tr><tr><td> f1/f2 </td><td> -0.651 </td><td> f1/ F234 </td><td> -1.537 </td></tr><tr><td> f2/f3 </td><td> 0.081 </td><td> f234/f5 </td>< Td> -0.119 </td></tr><tr><td> f3/f4 </td><td> 10.068 </td><td> f123/f4 </td><td> -0.984 </ Td></tr><tr><td> f4/f5 </td><td> -0.345 </td><td> f123/f45 </td><td> -0.647 </td></tr ><tr><td> f1/f3 </td><td> -0.053 </td><td> f1/f2345 </td><td> -1.259 </td></tr><tr>< Td> f2/f4 </td><td> 0.816 </td><td> V3-V2 </td><td> 34.600 </td></tr><tr><td> f3/f5 </ Td><td> -3.478 </td><td> V4-V5 </td><td> 34.600 </td></tr><tr><td> f1/f23 </td><td> - 0.719 </td><td> f/TL </td><td> 1.116 </td></tr></TBODY></TABLE>

<Fourth embodiment>

4A and 4B, wherein FIG. 4A is a schematic diagram of a five-piece imaging lens set according to a fourth embodiment of the present invention, and FIG. 4B is a five-piece imaging lens set of the fourth embodiment from left to right. Image curvature and distortion curve. As can be seen from FIG. 4A, the five-piece imaging lens assembly includes an aperture 400 and an optical group. The optical group includes a first lens 410, a second lens 420, a third lens 430, and a fourth from the object side to the image side. The lens 440, the fifth lens 450, the infrared filter element 470, and the imaging surface 480, wherein the five-piece imaging lens group has five lenses with refractive power. The aperture 400 is disposed between the object side surface 411 and the image side surface 412 of the first lens 410.

The first lens 410 has a positive refractive power and is made of a plastic material. The object side surface 411 is convex at the near optical axis 490, and the image side surface 412 is concave at the near optical axis 490, and the object side surface 411 and the image side are Surface 412 is aspherical.

The second lens 420 has a negative refractive power and is made of a plastic material. The object side surface 421 is convex at the near optical axis 490, and the image side surface 422 is concave at the near optical axis 490, and the object side surface 421 and the image side are Surface 422 is aspherical.

The third lens 430 has a negative refractive power and is made of a plastic material. The object side surface 431 is convex at the near optical axis 490, and the image side surface 432 is concave at the near optical axis 490, and the object side surface 431 and the image side are Surface 432 is aspherical.

The fourth lens 440 has a negative refractive power and is made of a plastic material. The object side surface 441 is concave at the near optical axis 490, and the image side surface 442 is concave at the near optical axis 490, and the object side surface 441 and the image side are Surface 442 is aspherical.

The fifth lens 450 has a positive refractive power and is made of a plastic material. The object side surface 451 is convex at the near optical axis 490, and the image side surface 452 is convex at the near optical axis 490, and the object side surface 451 and the image side are The surface 452 is aspherical, and at least one surface of the object side surface 451 and the image side surface 452 has at least one inflection point.

The infrared filter element 470 is made of glass and disposed between the fifth lens 450 and the imaging surface 480 without affecting the focal length of the five-piece imaging lens set.

Refer to Table 7 and Table 8 below for reference.

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td><b>Table 7</b></td></tr><tr>< Td> Fourth embodiment </td></tr><tr><td><u>f(uu><u>focal length)=5.970 mm (mm), Fno (aperture value) = 2.4, FOV (painting angle) = 49 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> 0.500 </td> <td> </td><td> </td><td> </td><td> </td></tr><tr><td> 2 </td><td> aperture</td ><td> Unlimited</td><td> </td><td> -0.500 </td><td> </td><td> </td><td> </td><td> < /td></tr><tr><td> 3 </td><td> First lens</td><td> 1.477 </td><td> (ASP) </td><td> 0.837 </td><td> Plastic</td><td> 1.544 </td><td> 56.0 </td><td> 2.72 </td></tr><tr><td> 4 </td ><td> </td><td> 172.777 </td><td> (ASP) </td><td> 0.143 </td><td> </td ><td> </td><td> </td><td> </td></tr><tr><td> 5 </td><td> second lens</td><td> 4.545 </td><td> (ASP) </td><td> 0.248 </td><td> Plastic</td><td> 1.661 </td><td> 20.4 </td><td> -3.88 </td></tr><tr><td> 6 </td><td> </td><td> 1.614 </td><td> (ASP) </td><td> 0.294 </td><td> </td><td> </td><td> </td><td> </td></tr><tr><td> 7 </td><td> Third lens</td><td> 5.545 </td><td> (ASP) </td><td> 0.247 </td><td> plastic </td><td> 1.544 </td>< Td> 56.0 </td><td> -217.67 </td></tr><tr><td> 8 </td><td> </td><td> 5.214 </td><td> ( ASP) </td><td> 1.472 </td><td> </td><td> </td><td> </td><td> </td></tr><tr>< Td> 9 </td><td> Fourth lens</td><td> -7.791 </td><td> (ASP) </td><td> 0.253 </td><td> Plastic </ Td><td> 1.544 </td><td> 56.0 </td><td> -5.41 </td></tr><tr><td> 10 </td><td> </td>< Td> 4.813 </td><td> (ASP) </td><td> 0.106 </td><td> </td><td> </td><td> </td><td> < /td></tr><tr><td> 11 </td><td> Fifth lens</td><td> 13.365 </td><td> (ASP) </td><td> 0.585 </td><td> plastic </td><td> 1.661 </td><td> 20.4 </td><td> 11.33 </td></tr><tr><td> 12 </td><td> </td> <td> -17.110 </td><td> (ASP) </td><td> 0.438 </td><td> </td><td> </td><td> </td><td > </td></tr><tr><td> 13 </td><td> Infrared Filter Filter </td><td> Unlimited</td><td> 0.210 </td>< Td> glass</td><td> 1.517 </td><td> 64.2 </td><td> </td></tr><tr><td> 14 </td><td> </ Td><td> infinity</td><td> 0.500 </td><td> </td><td> </td><td> </td><td> </td></tr> <tr><td> 15 </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 8</b></td></tr><tr>< Td> aspherical coefficient </td></tr><tr><td> plane</td><td> 3 </td><td> 4 </td><td> 5 </td><td > 6 </td><td> 7 </td></tr><tr><td> K: </td><td> -5.7530E-03 </td><td> -1.4962E+02 </td><td> 4.8205E+00 </td><td> 1.5579E+00 </td><td> 2.3100E+01 </td></tr><tr><td> A: < /td><td> -1.7880E-03 </td><td> -8.1690E-03 </td><td> -1.7094E-01 </td><td> -2.5417E-01 </td ><td> 1.5879E-02 </td></tr><tr><td> B: </td><td> -6.2500E-03 </td><td> 8.0859E-02 </td ><td> 3.8572E-01 </td><td> 4.5904E-01 </td><td> 1.1718E-01 </td></tr><tr><td> C: </td> <td> 7.7240E-03 </td><td> -8.9687E-02 </td><td> -3.5619E-01 </td><td> -3.5195E-01 </td><td> 7.9936E-02 </td></tr><tr><td> D: </td><td> -7.9500E-03 </td><td> 5.9735E-02 </td><td> 2.1956E-01 </td><td> 3.3991E-01 </td><td> -5.3080E-02 </td></tr><tr><td> E: </td><td> 2.5740E-03 </td><td> -1.6614E-02 </td><td> -6.9147E-02 </td><td> -1.2373E-01 </td><td> -4.0770E -03 </td></tr><tr><td> flat Face </td><td> 8 </td><td> 9 </td><td> 10 </td><td> 11 </td><td> 12 </td></tr>< Tr><td> K: </td><td> 1.2588E+01 </td><td> 1.5686E+01 </td><td> -1.8927E+01 </td><td> -1.7634 E+02 </td><td> -1.9061E+02 </td></tr><tr><td> A: </td><td> 1.0833E-01 </td><td> - 6.3739E-02 </td><td> -3.1251E-02 </td><td> -3.2403E-02 </td><td> -6.2172E-02 </td></tr><tr ><td> B: </td><td> 1.0373E-01 </td><td> -2.6400E-02 </td><td> -4.2372E-02 </td><td> -1.5351 E-02 </td><td> 1.4130E-03 </td></tr><tr><td> C: </td><td> 4.8232E-02 </td><td> 4.6439E -02 </td><td> 4.6470E-02 </td><td> 3.1279E-02 </td><td> 1.7958E-02 </td></tr><tr><td> D : </td><td> -1.3046E-01 </td><td> -2.6487E-02 </td><td> -2.8116E-02 </td><td> -2.6683E-02 < /td><td> -1.3940E-02 </td></tr><tr><td> E: </td><td> 8.6110E-02 </td><td> 8.8230E-03 < /td><td> 9.0950E-03 </td><td> 1.1141E-02 </td><td> 4.9870E-03 </td></tr><tr><td> F </td ><td> </td><td> -1.3080E-03 </td><td> -1.4160E-03 </td><td> -2.2290E-03 </td><td> -8.7800E -04 </td></tr><tr><td> G </td><td> </ Td><td> 3.7905E-05 </td><td> 8.1002E-05 </td><td> 1.7269E-04 </td><td> 6.1637E-05 </td></tr> </TBODY></TABLE>

In the fourth 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.

The following data can be derived from Table 7 and Table 8:

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> Fourth Embodiment</td></tr><tr><td> f[mm ] </td><td> 5.970 </td><td> f23/f45 </td><td> 0.342 </td></tr><tr><td> Fno </td><td> 2.4 </td><td> f12/f34 </td><td> -0.953 </td></tr><tr><td> FOV[deg.] </td><td> 49 </td> <td> f34/f5 </td><td> -0.470 </td></tr><tr><td> f1/f2 </td><td> -0.702 </td><td> f1/ F234 </td><td> -1.481 </td></tr><tr><td> f2/f3 </td><td> 0.018 </td><td> f234/f5 </td>< Td> -0.162 </td></tr><tr><td> f3/f4 </td><td> 40.214 </td><td> f123/f4 </td><td> -0.935 </ Td></tr><tr><td> f4/f5 </td><td> -0.478 </td><td> f123/f45 </td><td> -0.462 </td></tr ><tr><td> f1/f3 </td><td> -0.013 </td><td> f1/f2345 </td><td> -1.078 </td></tr><tr>< Td> f2/f4 </td><td> 0.717 </td><td> V3-V2 </td><td> 35.600 </td></tr><tr><td> f3/f5 </ Td><td> -19.205 </td><td> V4-V5 </td><td> 35.600 </td></tr><tr><td> f1/f23 </td><td> - 0.727 </td><td> f/TL </td><td> 1.120 </td></tr></TBODY></TABLE>

<Fifth Embodiment>

5A and 5B, wherein FIG. 5A is a schematic diagram of a five-piece imaging lens set according to a fifth embodiment of the present invention, and FIG. 5B is a five-piece imaging lens group of the fifth embodiment from left to right. Image curvature and distortion curve. As can be seen from FIG. 5A, the five-piece imaging lens assembly includes an aperture 500 and an optical group. The optical group includes a first lens 510, a second lens 520, a third lens 530, and a fourth from the object side to the image side. The lens 540, the fifth lens 550, the infrared filter element 570, and the imaging surface 580, wherein the five-piece imaging lens group has five refractive lenses. The aperture 500 is disposed between the object side surface 511 and the image side surface 512 of the first lens 510.

The first lens 510 has a positive refractive power and is made of a plastic material. The object side surface 511 is convex at the near optical axis 590, and the image side surface 512 is concave at the near optical axis 590, and the object side surface 511 and the image side are Surface 512 is aspherical.

The second lens 520 has a negative refractive power and is made of a plastic material. The object side surface 521 is convex at the near optical axis 590, and the image side surface 522 is concave at the near optical axis 590, and the object side surface 521 and the image side are Surface 522 is aspherical.

The third lens 530 has a negative refractive power and is made of a plastic material. The object side surface 531 is convex at the near optical axis 590, and the image side surface 532 is concave at the near optical axis 590, and the object side surface 531 and the image side are Surface 532 is aspherical.

The fourth lens 540 has a negative refractive power and is made of a plastic material. The object side surface 541 is concave at the near optical axis 590, and the image side surface 542 is concave at the near optical axis 590, and the object side surface 541 and the image side are Surface 542 is aspherical.

The fifth lens 550 has a positive refractive power and is made of a plastic material. The object side surface 551 is convex at the near optical axis 590, and the image side surface 552 is concave at the near optical axis 590, and the object side surface 551 and the image side are The surface 552 is aspherical, and the object side surface 551 and the image side surface 552 have at least one surface having at least one inflection point.

Refer to Table 9 and Table 10 below.

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td><b>Table 9</b></td></tr><tr>< Td> Fifth embodiment </td></tr><tr><td><u>f(uu)<5.9> focal length) = 5.980 mm (mm), Fno (aperture value) = 2.4, FOV (painting angle) = 49.2 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> 0.500 </td> <td> </td><td> </td><td> </td><td> </td></tr><tr><td> 2 </td><td> aperture</td ><td> Unlimited</td><td> </td><td> -0.500 </td><td> </td><td> </td><td> </td><td> < /td></tr><tr><td> 3 </td><td> First lens</td><td> 1.461 </td><td> (ASP) </td><td> 0.830 </td><td> Plastic</td><td> 1.544 </td><td> 56.0 </td><td> 2.72 </td></tr><tr><td> 4 </td ><td> </td><td> 84.339 </td><td> (ASP) </td><td> 0.168 </td><td> </t d><td> </td><td> </td><td> </td></tr><tr><td> 5 </td><td> second lens</td><td > 4.420 </td><td> (ASP) </td><td> 0.249 </td><td> Plastic</td><td> 1.661 </td><td> 20.4 </td><td > -3.93 </td></tr><tr><td> 6 </td><td> </td><td> 1.608 </td><td> (ASP) </td><td> 0.314 </td><td> </td><td> </td><td> </td><td> </td></tr><tr><td> 7 </td><td > Third lens</td><td> 7.396 </td><td> (ASP) </td><td> 0.252 </td><td> Plastic </td><td> 1.544 </td> <td> 56.0 </td><td> -52.27 </td></tr><tr><td> 8 </td><td> </td><td> 5.802 </td><td> (ASP) </td><td> 1.488 </td><td> </td><td> </td><td> </td><td> </td></tr><tr> <td> 9 </td><td> Fourth lens</td><td> -9.675 </td><td> (ASP) </td><td> 0.241 </td><td> Plastic< /td><td> 1.544 </td><td> 56.0 </td><td> -5.75 </td></tr><tr><td> 10 </td><td> </td> <td> 4.681 </td><td> (ASP) </td><td> 0.160 </td><td> </td><td> </td><td> </td><td> </td></tr><tr><td> 11 </td><td> Fifth lens</td><td> 26.634 </td><td> (ASP) </td><td> 0.600 </td><td> plastic </td><td> 1.661 </td><td> 20.4 </td><td> 11.25 </td></tr><tr><td> 12 </td><td> </td> <td> -10.352 </td><td> (ASP) </td><td> 0.316 </td><td> </td><td> </td><td> </td><td > </td></tr><tr><td> 13 </td><td> Infrared Filter Filter </td><td> Unlimited</td><td> 0.210 </td>< Td> glass</td><td> 1.517 </td><td> 64.2 </td><td> </td></tr><tr><td> 14 </td><td> </ Td><td> infinity</td><td> 0.500 </td><td> </td><td> </td><td> </td><td> </td></tr> <tr><td> 15 </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 10</b></td></tr><tr>< Td> aspherical coefficient </td></tr><tr><td> plane</td><td> 3 </td><td> 4 </td><td> 5 </td><td > 6 </td><td> 7 </td></tr><tr><td> K: </td><td> 1.8580E-03 </td><td> 5.0008E+02 </ Td><td> 4.2526E+00 </td><td> 1.4899E+00 </td><td> 1.8213E+01 </td></tr><tr><td> A: </td ><td> -1.3310E-03 </td><td> -6.1010E-03 </td><td> -1.7171E-01 </td><td> -2.5573E-01 </td>< Td> 1.4364E-02 </td></tr><tr><td> B: </td><td> -5.7690E-03 </td><td> 8.0491E-02 </td>< Td> 3.8483E-01 </td><td> 4.6402E-01 </td><td> 1.2826E-01 </td></tr><tr><td> C: </td><td > 8.1970E-03 </td><td> -8.9645E-02 </td><td> -3.5714E-01 </td><td> -3.5028E-01 </td><td> 8.1915E -02 </td></tr><tr><td> D: </td><td> -7.6230E-03 </td><td> 6.0099E-02 </td><td> 2.1918E -01 </td><td> 3.3500E-01 </td><td> -7.5391E-02 </td></tr><tr><td> E: </td><td> 2.8050E -03 </td><td> -1.7149E-02 </td><td> -7.3542E-02 </td><td> -1.0121E-01 </td><td> 2.6810E-03 < /td></tr><tr><td> flat </td><td> 8 </td><td> 9 </td><td> 10 </td><td> 11 </td><td> 12 </td></tr><tr ><td> K: </td><td> 1.4638E+01 </td><td> 1.1292E+01 </td><td> -1.9333E+00 </td><td> 4.8034E+ 01 </td><td> -3.8795E+00 </td></tr><tr><td> A: </td><td> 1.1306E-01 </td><td> -6.4796E -02 </td><td> -4.2477E-02 </td><td> -3.5267E-02 </td><td> -6.3822E-02 </td></tr><tr>< Td> B: </td><td> 9.6590E-02 </td><td> -2.3054E-02 </td><td> -3.9546E-02 </td><td> -1.4751E- 02 </td><td> 1.2480E-03 </td></tr><tr><td> C: </td><td> 4.3155E-02 </td><td> 4.5840E-02 </td><td> 4.6449E-02 </td><td> 3.0997E-02 </td><td> 1.8122E-02 </td></tr><tr><td> D: < /td><td> -1.0218E-01 </td><td> -2.6924E-02 </td><td> -2.8182E-02 </td><td> -2.6700E-02 </td ><td> -1.3917E-02 </td></tr><tr><td> E: </td><td> 2.7090E-02 </td><td> 8.6830E-03 </td ><td> 9.0500E-03 </td><td> 1.1150E-02 </td><td> 4.9870E-03 </td></tr><tr><td> F </td>< Td> </td><td> -1.3300E-03 </td><td> -1.4250E-03 </td><td> -2.2270E-03 </td><td> -8.7900E-04 </td></tr><tr><td> G </td><td> </td> <td> 6.0546E-05 </td><td> 8.4030E-05 </td><td> 1.7219E-04 </td><td> 6.1644E-05 </td></tr></ TBODY></TABLE>

In the fifth 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.

The following data can be derived from Table 9 and Table 10:

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> Fifth Embodiment</td></tr><tr><td> f[mm ] </td><td> 5.983 </td><td> f23/f45 </td><td> 0.279 </td></tr><tr><td> Fno </td><td> 2.4 </td><td> f12/f34 </td><td> -0.966 </td></tr><tr><td> FOV[deg.] </td><td> 49.2 </td> <td> f34/f5 </td><td> -0.453 </td></tr><tr><td> f1/f2 </td><td> -0.692 </td><td> f1/ F234 </td><td> -1.480 </td></tr><tr><td> f2/f3 </td><td> 0.075 </td><td> f234/f5 </td>< Td> -0.163 </td></tr><tr><td> f3/f4 </td><td> 9.097 </td><td> f123/f4 </td><td> -0.893 </ Td></tr><tr><td> f4/f5 </td><td> -0.511 </td><td> f123/f45 </td><td> -0.399 </td></tr ><tr><td> f1/f3 </td><td> -0.052 </td><td> f1/f2345 </td><td> -1.049 </td></tr><tr>< Td> f2/f4 </td><td> 0.683 </td><td> V3-V2 </td><td> 35.600 </td></tr><tr><td> f3/f5 </ Td><td> -4.647 </td><td> V4-V5 </td><td> 35.600 </td></tr><tr><td> f1/f23 </td><td> - 0.757 </td><td> f/TL </td><td> 1.123 </td></tr></TBODY></TABLE>

The five-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 five-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 five-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 five-piece imaging lens set of the present invention.

In the five-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 five-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 many 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, 400, 500‧ ‧ aperture

110, 210, 310, 410, 510‧‧‧ first lens

111, 211, 311, 411, 511 ‧ ‧ ‧ side surface

112, 212, 312, 412, 512‧‧‧ image side surface

120, 220, 320, 420, 520‧‧‧ second lens

121, 221, 321, 421, 521‧‧‧ ‧ side surface

122, 222, 322, 422, 522‧‧‧ image side surface

130, 230, 330, 430, 530‧‧‧ third lens

131, 231, 331, 431, 531‧‧‧ ‧ side surface

132, 232, 332, 432, 532‧‧‧ image side surface

140, 240, 340, 440, 540 ‧ ‧ fourth lens

141, 241, 341, 441, 541 ‧ ‧ ‧ side surface

142, 242, 342, 442, 542‧‧‧ side surface

150, 250, 350, 450, 550 ‧ ‧ fifth lens

151, 251, 351, 451, 551 ‧ ‧ ‧ side surface

152, 252, 352, 452, 552‧‧‧ side surface

170, 270, 370, 470, 570‧‧‧ Infrared filtering filter elements

180, 280, 380, 480, 580‧‧ ‧ imaging surface

190, 290, 390, 490, 590‧‧ ‧ optical axis

f‧‧‧Focus of the five-piece imaging lens set

Aperture value of Fno‧‧‧ five-piece imaging lens set

Maximum field of view in the FOV‧‧‧ five-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

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

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

F2345‧‧‧Combined focal length of the second lens, the third lens, the fourth lens and the fifth lens

V2‧‧‧Dispersion coefficient of the second lens

V3‧‧‧Dispersion coefficient of the third lens

V4‧‧‧Dispersion coefficient of the fourth lens

Dispersion coefficient of V5‧‧‧ fifth lens

TL‧‧‧The distance from the object side surface of the first lens to the imaging surface on the optical axis

Figure 1A is a schematic illustration of a five-piece imaging lens set in accordance with a first embodiment of the present invention. Fig. 1B is a graph showing the curvature of field and the distortion of the five-piece imaging lens group of the first embodiment from left to right. 2A is a schematic view of a five-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 five-piece imaging lens group of the second embodiment from left to right. Figure 3A is a schematic illustration of a five-piece imaging lens set in accordance with a third embodiment of the present invention. Fig. 3B is a graph showing the curvature of field and the distortion of the five-piece imaging lens group of the third embodiment, from left to right. 4A is a schematic view of a five-piece imaging lens set of a fourth embodiment of the present invention. 4B is a graph showing the curvature of field and the distortion of the five-piece imaging lens group of the fourth embodiment from left to right. Figure 5A is a schematic illustration of a five-piece imaging lens set in accordance with a fifth embodiment of the present invention. Fig. 5B is a graph showing the curvature of field and the distortion of the five-piece imaging lens group of the fifth embodiment, from left to right.

Claims (19)

A five-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 object side surface and the image side surface At least one surface is aspherical; a second lens has a negative 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 at least one surface of the object side surface and the image side surface a third lens having a negative refractive power, the object side surface being convex at the near optical axis, the image side surface being concave at the near optical axis, and at least one surface of the object side surface and the image side surface being aspherical a fourth lens having a negative refractive power, wherein the object side surface is concave at a near optical axis, the image side surface is concave at a near optical axis, and at least one surface of the object side surface and the image side surface is aspherical; and The fifth lens has a positive refractive power, 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 opposite a curved point; wherein the focal length of the third lens is f3 Focal length of the fourth lens element is f4, and the following conditions: 2.5 <f3 / f4 <43. The five-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: -0.8 < f1/f2 < -0.5. The five-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: 0.005 < f2 / f3 < 0.35. The five-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: -0.7 < f4 / f5 < -0.2. The five-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: -0.25 < f1/f3 < -0.005. The five-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: 0.5 < f2 / f4 < 1.0. The five-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: -23 < f3 / f5 < -1.4. The five-piece imaging lens set according to claim 1, 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: -0.95<f1/f23< -0.55. The five-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: 0.15< F23/f45<0.65. The five-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: -1.5 <f12/f34<-0.7. The five-piece imaging lens set according to claim 1, wherein the combined focal length of the third lens and the fourth lens is f34, the focal length of the fifth lens is f5, and the following condition is satisfied: -0.65<f34/f5< -0.15. The five-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: -1.8< F1/f234<-1.3. The five-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: -0.3< F234/f5<-0.05. The five-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: -1.2< F123/f4<-0.75. The five-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: -0.8 < f123 / f45 < - 0.25. The five-piece imaging lens set according to claim 1, wherein the second lens has a dispersion coefficient of V2, the third lens has a dispersion coefficient of V3, and satisfies the following condition: 30<V3-V2<42. The five-piece imaging lens set according to claim 1, wherein the fourth lens has a dispersion coefficient of V4, the fifth lens has a dispersion coefficient of V5, and satisfies the following condition: 30 < V4 - V5 < 42. The five-piece imaging lens set according to claim 1, wherein the overall focal length of the five-piece imaging lens group is f, and 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: 0.95 < f / TL < 1.3. The five-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, the fourth lens, and the fifth lens is f2345, and the following conditions are met. :-1.5<f1/f2345<-0.75.