TWI518359B - Five-piece optical lens system - Google Patents

Description

Five-piece imaging lens set

The present invention relates to an imaging lens set, and more particularly to a five-piece imaging lens set.

The high-quality small photographic lens is the standard equipment of current portable electronic products, and the photosensitive element of the general photographic lens is nothing more than a charge coupled device (CCD) or a complementary metal oxide semiconductor (Complementary Metal- Oxide Semiconductor (CMOS), due to advances in semiconductor process technology, has reduced the pixel area of the photosensitive element, and the miniaturized photographic lens has gradually developed into the high-pixel field. Therefore, the requirements for image quality are increasing.

The miniaturized photographic lens that is traditionally used in portable electronic products mainly uses a four-piece lens structure. However, as electronic products such as mobile phone cameras continue to be light, thin, high-performance, and high-definition, the photosensitive element 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.

It is an object of the present invention to provide a five-piece imaging lens set that can be applied to a high-resolution mobile phone camera without causing the total length of the lens to be too long, while having a large picture angle and a large A five-piece imaging lens set with aperture, high count, high resolution and low lens height.

In order to achieve the foregoing objective, a five-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 image side surface of which is a convex surface, and at least one side of the object side surface and the image side surface of the first lens is aspherical; a second lens having a negative refractive power, the object side surface is a convex surface, and the object side surface and the image of the second lens At least one side of the side surface is aspherical; a third lens has a concave side on the image side surface, and at least one side of the object side surface and the image side surface of the third lens is aspherical; a fourth lens having positive refractive power The object side surface is a convex surface, and at least one side of the object side surface and the image side surface of the fourth lens is aspherical; a fifth lens having a negative refractive power, the object side surface is a concave surface, and the fifth lens At least one side of the object side surface and the image side surface is aspherical.

Preferably, the object side surface and the image side surface of the third lens have at least one mask having an inflection point, and the object side surface and the image side surface of the fourth lens have at least one mask having an inflection point. Thereby, the aberration of the off-axis field of view can be further corrected.

Preferably, 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 < -0.4. 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, the second lens has a focal length of f2, and the fourth lens has a focal length of f4 and satisfies the following condition: -3.3 < f2 / f4 < -2.0. 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, the fourth lens has a focal length of f4, and the fifth lens has a focal length of f5 and satisfies the following condition: -1.4 < f4 / f5 < -0.8. Thereby, the refractive power of the fourth and fifth lenses is suitable, and the system aberration can be effectively corrected.

Preferably, the focal length of the first lens is f1, and the second lens and the third lens The combined focal length is f23 and the following conditions are satisfied: -0.9 < f1/f23 < -0.3. Thereby, it is advantageous to shorten the overall optical length of the whole and contribute to the correction of the aberration, so that the configuration of the overall refractive power is advantageous in providing a good wide viewing angle characteristic and aberration correction capability.

Preferably, the combined focal length of the second lens and the third lens is f23, and the focal length of the fourth lens is f4, and the following condition is satisfied: -3.8 < f23 / f4 < 1.8. Thereby, the system aberration can be effectively corrected.

Preferably, 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: 1.0<f1/f234<2.0. Thereby, it is advantageous to shorten the overall optical length of the whole and contribute to the correction of the aberration, so that the configuration of the overall refractive power is advantageous in providing a good wide viewing angle characteristic and aberration correction capability.

Preferably, the combined focal length of the second lens, the third lens and the fourth lens is f234, and the focal length of the fifth lens is f5, and the following condition is satisfied: -1.6<f234/f5<-0.8. Thereby, it is advantageous to shorten the overall optical length of the whole and contribute to the correction of the aberration, so that the configuration of the overall refractive power is advantageous in providing a good wide viewing angle characteristic and aberration correction capability.

Preferably, the combined focal length of the first lens and the second lens is f12, and the combined focal length of the third lens and the fourth lens is f34, and the following condition is satisfied: 2.0<f12/f34<4.5. Thereby, the system aberration can be effectively corrected.

Preferably, the focal length of the second lens is f2, the combined focal length of the third lens and the fourth lens is f34, and the following condition is satisfied: -3.5 < f2 / f34 < -1.7. Thereby, it is advantageous to shorten the overall optical length of the whole and contribute to the correction of the aberration, so that the configuration of the overall refractive power is advantageous in providing a good wide viewing angle characteristic and aberration correction capability.

Preferably, the combined focal length of the third lens and the fourth lens is f34, and the focal length of the fifth lens is f5, and the following condition is satisfied: -1.4 < f34 / f5 < -0.8. Thereby, it is advantageous to shorten the overall optical total length and contribute to the correction of the aberration, so that the overall refractive power configuration is advantageous. Provides good wide viewing angle characteristics and aberration correction capabilities.

Preferably, the combined focal length of the first lens and the second lens is f12, and the combined focal length of the third lens, the fourth lens and the fifth lens is f345, and the following condition is satisfied: 0.1<f12/f345< 0.6. Thereby, it is advantageous to shorten the overall optical length of the whole and contribute to the correction of the aberration, so that the configuration of the overall refractive power is advantageous in providing a good wide viewing angle characteristic and aberration correction capability.

Preferably, the combined focal length of the first lens, the second lens and the third lens is f123, and the focal length of the fifth lens is f5, and the following condition is satisfied: -4.2 < f123 / f5 < -2.7. Thereby, it is advantageous to shorten the overall optical length of the whole and contribute to the correction of the aberration, so that the configuration of the overall refractive power is advantageous in providing a good wide viewing angle characteristic and aberration correction capability.

Preferably, 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 surface on the optical axis is TL, and the following condition is satisfied: 0.7 < f / TL < 0.9. Thereby, it is advantageous to obtain a wide picture angle (angle of view) and to facilitate the miniaturization of the five-piece imaging lens group to be mounted on a thin electronic product.

The invention has been described with reference to the preferred embodiments of the present invention in order to attain

100, 200, 300, 400, 500, 600, 700, 800, 900, 1000 ‧ ‧ aperture

110, 210, 310, 410, 510, 610, 710, 810, 910, 1010‧‧‧ first lens

111, 211, 311, 411, 511, 611, 711, 811, 911, 1011‧‧‧

112, 212, 312, 412, 512, 612, 712, 812, 912, 1012‧‧‧ image side surface

120, 220, 320, 420, 520, 620, 720, 820, 920, 1020‧‧‧ second lens

121, 221, 321, 421, 521, 621, 721, 821, 921, 1021‧‧‧

122, 222, 322, 422, 522, 622, 722, 822, 922, 1022‧‧‧ image side surface

130, 230, 330, 430, 530, 630, 730, 830, 930, 1030‧‧‧ third lens

131, 231, 331, 431, 531, 631, 731, 831, 931, 1031‧‧‧

132, 232, 332, 432, 532, 632, 732, 832, 932, 1032‧‧‧ image side surface

140, 240, 340, 440, 540, 640, 740, 840, 940, 1040‧‧‧ fourth lens

141, 241, 341, 441, 541, 641, 741, 841, 941, 1041‧‧‧

142, 242, 342, 442, 542, 642, 742, 842, 942, 1042 ‧ ‧ side surface

150, 240, 350, 450, 550, 650, 750, 850, 950, 1050‧‧‧ fifth lens

151, 251, 351, 451, 551, 651, 751, 851, 951, 1051 ‧ ‧ ‧ side surface

152, 252, 352, 452, 552, 652, 752, 852, 952, 1052‧‧‧ image side surface

160, 260, 360, 460, 560, 660, 760, 860, 960, 1060‧ ‧ infrared filter elements

170, 270, 370, 470, 570, 670, 770, 870, 970, 1070‧‧ ‧ imaging surface

180, 280, 380, 480, 580, 680, 780, 880, 980, 1080‧‧‧ optical axis

f‧‧‧Integral focal length of five-piece imaging lens set

Overall aperture value of the Fno‧‧‧ five-piece imaging lens set

2 ω‧‧‧ five-piece imaging lens set

F1‧‧‧The focal length of the first lens

F2‧‧‧The focal length of the second lens

F4‧‧‧Focus of the fourth lens

f5‧‧‧Focus of the fifth lens

F12‧‧‧ Combination focal length of the first lens and the second lens

F23‧‧‧ Combination focal length of the second lens and the third lens

F34‧‧‧ Combination focal length of the third lens and the fourth lens

f123‧‧‧The combined focal length of the first lens, the second lens and the third lens

f234‧‧‧The combined focal length of the second lens, the third lens and the fourth lens

F345‧‧‧The combined focal length of the third lens, the fourth lens and the fifth lens

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

Fig. 1A is a schematic view showing a five-piece imaging lens group of the first embodiment of the present invention.

Fig. 1B is a left-to-right sequence of spherical aberration, astigmatism, and distortion of the five-piece imaging lens group of the first embodiment.

2A is a schematic view of a five-piece imaging lens set of a second embodiment of the present invention.

Fig. 2B is a left-to-right sequence of spherical aberration, astigmatism, and distortion of the five-piece imaging lens group of the second embodiment.

Figure 3A is a schematic illustration of a five-piece imaging lens set of a third embodiment of the present invention.

Fig. 3B is a left-to-right sequence of spherical aberration, astigmatism, and distortion of the five-piece imaging lens group of the third embodiment.

Figure 4A is a schematic view of a five-piece imaging lens set of a fourth embodiment of the present invention.

4B is a spherical aberration, astigmatism, and distortion curve of the five-piece imaging lens group of the fourth embodiment, from left to right.

Fig. 5A is a schematic view showing a five-piece imaging lens group of a fifth embodiment of the present invention.

Fig. 5B is a left-to-right sequence of spherical aberration, astigmatism, and distortion of the five-piece imaging lens group of the fifth embodiment.

Figure 6A is a schematic view of a five-piece imaging lens set of a sixth embodiment of the present invention.

Fig. 6B is a spherical aberration, astigmatism, and distortion curve of the five-piece imaging lens group of the sixth embodiment, from left to right.

Fig. 7A is a schematic view showing a five-piece imaging lens unit of a seventh embodiment of the present invention.

Fig. 7B is a spherical aberration, astigmatism, and distortion curve of the five-piece imaging lens group of the seventh embodiment, from left to right.

Fig. 8A is a schematic view showing a five-piece imaging lens group of an eighth embodiment of the present invention.

Fig. 8B is a spherical aberration, astigmatism, and distortion curve of the five-piece imaging lens group of the eighth embodiment, from left to right.

Fig. 9A is a schematic view showing a five-piece imaging lens group of a ninth embodiment of the present invention.

Fig. 9B is a left-to-right sequence of spherical aberration, astigmatism, and distortion of the five-piece imaging lens group of the ninth embodiment.

Figure 10A is a schematic view of a five-piece imaging lens set of a tenth embodiment of the present invention.

Fig. 10B is a spherical aberration, astigmatism, and distortion curve of the five-piece imaging lens group of the tenth embodiment, from left to right.

<First Embodiment>

Please refer to FIG. 1A and FIG. 1B , wherein 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 sequentially divided from left to right into five pieces of the first embodiment. The spherical aberration, astigmatism and distortion curves of the imaging lens group. As can be seen from FIG. 1A, the five-piece imaging lens group includes an aperture 100, a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, and a second from the object side to the image side. The fifth lens 150, an infrared filter filter element 160, and an imaging surface 170.

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 180, and the image side surface 112 is convex at the near optical axis 180, 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 180, and the image side surface 122 is concave at the near optical axis 180, 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 180, and the image side surface 132 is concave at the near optical axis 180, and the object side surface 131 and the image side are The surface 132 is aspherical, and the object side surface 131 and the image side surface 132 have at least one mask having an inflection point.

The fourth lens 140 has a positive refractive power and is made of a plastic material. The object side surface 141 is convex at the near optical axis 180, and the image side surface 142 is convex at the near optical axis 180, and the object side surface 141 and the image side are The surface 142 is aspherical, and the object side surface 141 and the image side surface 142 have at least one mask having an inflection point.

The fifth lens 150 has a negative refractive power and is made of a plastic material. The object side surface 141 is concave at the near optical axis 180, and the image side surface 142 is concave at the near optical axis 180, and the object side surface 141 and the image side are Surfaces 142 are all aspherical.

The infrared filter element 160 is made of glass and disposed between the fifth lens 150 and the imaging surface 170 without affecting the focal length of the five-piece imaging lens group.

The equation for the above aspheric curve is expressed as follows:

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 180; c is the curvature of the lens surface near the optical axis 180, 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 180, h is the vertical distance of the lens surface from the optical axis 180, k is a conic constant, and A, B, C, D, E, F, ... are high order Aspheric coefficient.

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 overall aperture value (f-number) of the five-piece imaging lens group is Fno, a five-piece imaging lens group. The angle of drawing is 2 ω, and its value is as follows: f = 3.8094 mm (mm); Fno = 2.0; and 2 ω = 77 degrees.

In the five-piece imaging lens set 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=-0.6417.

In the five-piece imaging lens set of the first embodiment, the focal length of the second lens 120 is f2, and the focal length of the fourth lens 140 is f4, and the following condition is satisfied: f2/f4=-2.3983.

In the five-piece imaging lens set of the first embodiment, the focal length of the fourth lens 140 is f4, and the focal length of the fifth lens 150 is f5, and the following condition is satisfied: f4/f5=-1.0865.

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 condition is satisfied: f1/f23=-0.6966 .

The five-piece imaging lens set of the first embodiment, the second lens 120 and the third The combined focal length of the lens 130 is f23, and the fourth lens 140 has a focal length of f4 and satisfies the following condition: f23/f4 = -2.2094.

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 second lens 120, the third lens 130, and the fourth lens 140 is f234, and the following conditions are met: f1 /f234=1.3440.

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 condition is satisfied: f234 /f5=-1.2442.

In the five-piece imaging lens set of the first embodiment, the combined 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=2.8731.

In the five-piece imaging lens set of the first embodiment, the focal length of the second lens 120 is f2, and the combined focal length of the third lens 130 and the fourth lens 140 is f34, and the following conditions are satisfied: f2/f34=-2.2899 .

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 condition is satisfied: f34/f5=-1.1379 .

In the five-piece imaging lens set of the first embodiment, the combined focal length of the first lens 110 and the second lens 120 is f12, and the combined focal length of the third lens 130, the fourth lens 140 and the fifth lens 150 is F345, and the following conditions are met: f12/f345=0.3610.

In the five-piece imaging lens set of the first embodiment, the combined focal length of the first lens 110, the second lens 120 and the third lens 130 is f123, and the focal length of the fifth lens 150 is f5. And the following conditions are met: f123/f5=-3.2567.

In the five-piece imaging lens set 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 170 of the first lens 110 on the optical axis 180 is TL, and The following conditions are met: f/TL = 0.8012.

Refer to Table 1 and Table 2 below for reference.

Table 1 is the detailed structural data of the first embodiment of Fig. 1, in which the unit of curvature radius, thickness, and focal length is mm, and the surfaces 3-12 sequentially represent the surfaces 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 table of the following embodiments corresponds to the schematic diagram and the aberration diagram 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>

Please refer to FIG. 2A and FIG. 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 left-to-right sequence of five pieces of the second embodiment. The spherical aberration, astigmatism and distortion curves of the imaging lens group. As can be seen from FIG. 2A, the five-piece imaging lens group includes an aperture 200, a first lens 210, a second lens 220, a third lens 230, a fourth lens 240, and a second from the object side to the image side. The fifth lens 250, an infrared filter filter element 260, and an imaging surface 270.

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 280, and the image side surface 212 is convex at the near optical axis 280, 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 280, and the image side surface 222 is concave at the near optical axis 280, 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 280, and the image side surface 232 is concave at the near optical axis 280, and the object side surface 231 and the image side are The surface 232 is aspherical, and the object side surface 231 and the image side surface 232 have at least one mask. There is a recurve point.

The fourth lens 240 has a positive refractive power and is made of a plastic material. The object side surface 241 is convex at the near optical axis 280, and the image side surface 242 is convex at the near optical axis 280, and the object side surface 241 and the image side are The surface 242 is aspherical, and the object side surface 241 and the image side surface 242 have at least one mask having an inflection point.

The fifth lens 250 has a negative refractive power and is made of a plastic material. The object side surface 241 is concave at the near optical axis 280, and the image side surface 242 is concave at the near optical axis 280, and the object side surface 241 and the image side are Surface 242 is aspherical.

The infrared filter element 260 is made of glass and disposed between the fifth lens 250 and the imaging surface 270 without affecting the focal length of the five-piece imaging lens group.

The equation of the aspheric curve described above is expressed in the form of the first embodiment, and will not be described herein.

In the five-piece imaging lens set of the second embodiment, the overall focal length of the five-piece imaging lens group is f, the overall aperture value (f-number) of the five-piece imaging lens group is Fno, and the five-piece imaging lens group The angle of drawing is 2 ω, and its value is as follows: f = 3.9144 mm (mm); Fno = 2.0; and 2 ω = 77 degrees.

In the five-piece imaging lens set of the second embodiment, the focal length of the first lens 210 is f1, the focal length of the second lens 220 is f2, and the following condition is satisfied: f1/f2=-0.6210.

In the five-piece imaging lens set of the second embodiment, the focal length of the second lens 220 is f2, and the focal length of the fourth lens 240 is f4, and the following condition is satisfied: f2/f4=-2.6635.

In the five-piece imaging lens set of the second embodiment, the focal length of the fourth lens 240 is f4, and the focal length of the fifth lens 250 is f5, and the following condition is satisfied: f4/f5 = -1.0875.

The five-piece imaging lens set of the second embodiment, the focal length of the first lens 210 is F1, the combined focal length of the second lens 220 and the third lens 230 is f23, and the following condition is satisfied: f1/f23=-0.7258.

In the five-piece imaging lens set of the second embodiment, the combined focal length of the second lens 220 and the third lens 230 is f23, and the focal length of the fourth lens 240 is f4, and the following condition is satisfied: f23/f4=-2.2790.

In the five-piece imaging lens set of the second embodiment, the focal length of the first lens 210 is f1, and the combined focal length of the second lens 220, the third lens 230, and the fourth lens 240 is f234, and the following conditions are met: f1 /f234=1.5594.

In the five-piece imaging lens set of the second embodiment, the combined focal length of the second lens 220, the third lens 230 and the fourth lens 240 is f234, and the focal length of the fifth lens 250 is f5, and the following condition is satisfied: f234 /f5=-1.1536.

In the five-piece imaging lens set of the second embodiment, the combined focal length of the first lens 210 and the second lens 220 is f12, and the combined focal length of the third lens 230 and the fourth lens 240 is f34, and the following conditions are met. :f12/f34=3.0399.

In the five-piece imaging lens set of the second embodiment, the focal length of the second lens 220 is f2, and the combined focal length of the third lens 230 and the fourth lens 240 is f34, and the following conditions are satisfied: f2/f34=-2.5455 .

In the five-piece imaging lens set of the second embodiment, the combined focal length of the third lens 230 and the fourth lens 240 is f34, and the focal length of the fifth lens 250 is f5, and the following condition is satisfied: f34/f5=-1.1380 .

In the five-piece imaging lens set of the second embodiment, the combined focal length of the first lens 210 and the second lens 220 is f12, and the third lens 230, the fourth lens 240 and the fifth mirror The combined focal length of the sheet 250 is f345 and satisfies the following condition: f12/f345 = 0.3140.

In the five-piece imaging lens set of the second embodiment, the combined focal length of the first lens 210, the second lens 220 and the third lens 230 is f123, and the focal length of the fifth lens 250 is f5, and the following condition is met: f123 /f5=-3.7190.

In the five-piece imaging lens set of the second embodiment, the overall focal length of the five-piece imaging lens group is f, and the distance from the object side surface 211 of the first lens 210 to the imaging surface 270 on the optical axis 280 is TL, and The following conditions are met: f/TL = 0.8035.

Refer to Table 3 and Table 4 below. Table 3 shows the detailed structural data of the second embodiment of Fig. 2A. Table 4 shows the aspherical data in the second embodiment.

<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 third embodiment from left to right. The spherical aberration, astigmatism and distortion curves of the imaging lens group. As can be seen from FIG. 3A, the five-piece imaging lens group includes an aperture 300, a first lens 310, a second lens 320, a third lens 330, a fourth lens 340, and a second from the object side to the image side. The fifth lens 350, an infrared filter filter element 360, and an imaging surface 370.

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 380, and the image side surface 312 is convex at the near optical axis 380, 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 380, and the image side surface 322 is concave at the near optical axis 380, 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 380, and the image side surface 332 is concave at the near optical axis 380, and the object side surface 331 and the image side are The surface 332 is aspherical, and the object side surface 331 and the image side surface 332 have at least one mask having an inflection point.

The fourth lens 340 has a positive refractive power and is made of a plastic material, and the object side surface 341 The near optical axis 380 is a convex surface, and the image side surface 342 is convex at the near optical axis 380, and the object side surface 341 and the image side surface 342 are all aspherical surfaces, and the object side surface 341 and the image side surface 342 have at least One side has an inflection point.

The fifth lens 350 has a negative refractive power and is made of a plastic material. The object side surface 341 is concave at the near optical axis 380, and the image side surface 342 is concave at the near optical axis 380, and the object side surface 341 and the image side are Surfaces 342 are all aspherical.

The infrared filter element 360 is made of glass and disposed between the fifth lens 350 and the imaging surface 370 without affecting the focal length of the five-piece imaging lens set.

The equation of the aspheric curve described above is expressed in the form of the first embodiment, and will not be described herein.

In the five-piece imaging lens group of the third embodiment, the overall focal length of the five-piece imaging lens group is f, and the overall aperture value (f-number) of the five-piece imaging lens group is Fno, a five-piece imaging lens group. The angle of drawing is 2 ω, and its value is as follows: f = 3.6087 mm (mm); Fno = 2.0; and 2 ω = 80 degrees.

In the five-piece imaging lens set of the third embodiment, the focal length of the first lens 310 is f1, the focal length of the second lens 320 is f2, and the following condition is satisfied: f1/f2=-0.6057.

In the five-piece imaging lens set of the third embodiment, the focal length of the second lens 320 is f2, and the focal length of the fourth lens 340 is f4, and the following condition is satisfied: f2/f4=-2.8171.

In the five-piece imaging lens set of the third embodiment, the focal length of the fourth lens 340 is f4, and the focal length of the fifth lens 350 is f5, and the following condition is satisfied: f4/f5=-1.0535.

In the five-piece imaging lens set of the third embodiment, the focal length of the first lens 310 is f1, the combined focal length of the second lens 320 and the third lens 330 is f23, and the following conditions are satisfied: f1/f23=-0.7217 .

The five-piece imaging lens set of the third embodiment, the second lens 320 and the third mirror The combined focal length of the sheet 330 is f23, and the fourth lens 340 has a focal length of f4 and satisfies the following condition: f23/f4 = -2.3641.

In the five-piece imaging lens set of the third embodiment, the focal length of the first lens 310 is f1, and the combined focal length of the second lens 320, the third lens 330, and the fourth lens 340 is f234, and the following conditions are met: f1 /f234=1.5523.

In the five-piece imaging lens set of the third embodiment, the combined focal length of the second lens 320, the third lens 330, and the fourth lens 340 is f234, and the focal length of the fifth lens 350 is f5, and the following condition is satisfied: f234 /f5=-1.1579.

In the five-piece imaging lens set of the third embodiment, the combined focal length of the first lens 310 and the second lens 320 is f12, and the combined focal length of the third lens 330 and the fourth lens 340 is f34, and the following conditions are met. :f12/f34=3.0618.

In the five-piece imaging lens set of the third embodiment, the focal length of the second lens 320 is f2, the combined focal length of the third lens 330 and the fourth lens 340 is f34, and the following condition is satisfied: f2/f34=-2.6806 .

In the five-piece imaging lens set of the third embodiment, the combined focal length of the third lens 330 and the fourth lens 340 is f34, and the focal length of the fifth lens 350 is f5, and the following condition is satisfied: f34/f5=-1.1071 .

In the five-piece imaging lens set of the third embodiment, the combined focal length of the first lens 310 and the second lens 320 is f12, and the combined focal length of the third lens 330, the fourth lens 340 and the fifth lens 350 is F345, and the following conditions are met: f12/f345=0.4290.

In the five-piece imaging lens set of the third embodiment, the combined focal length of the first lens 310, the second lens 320 and the third lens 330 is f123, and the focal length of the fifth lens 350 is f5, and the following condition is met: f123 /f5=-3.7082.

a five-piece imaging lens set of the third embodiment, the five-piece imaging lens set The overall focal length is f, the distance from the object side surface 311 to the imaging surface 370 of the first lens 310 on the optical axis 380 is TL, and the following condition is satisfied: f/TL = 0.7869.

Refer to Table 5 and Table 6 below for reference. Table 5 is the detailed structural data of the third embodiment of Fig. 3A. Table 6 shows the aspherical data in the third embodiment.

<Fourth embodiment>

Please refer to FIG. 4A and FIG. 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 fourth embodiment from left to right. The spherical aberration, astigmatism and distortion curves of the imaging lens group. As can be seen from FIG. 4A, the five-piece imaging lens group includes an aperture 400, a first lens 410, a second lens 420, a third lens 430, a fourth lens 440, and a second from the object side to the image side. The fifth lens 450, an infrared filter filter element 460, and an imaging surface 470.

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 480, and the image side surface 412 is convex at the near optical axis 480, 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 480, and the image side surface 422 is concave at the near optical axis 480, 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 480, and the image side surface 432 is concave at the near optical axis 480, and the object side surface 431 and the image side are The surface 432 is aspherical, and the object side surface 431 and the image side surface 432 have at least one mask having an inflection point.

The fourth lens 440 has a positive refractive power and is made of a plastic material. The object side surface 441 is convex at the near optical axis 480, and the image side surface 442 is convex at the near optical axis 480, and the object side surface 441 and the image side are The surface 442 is aspherical, and the object side surface 441 and the image side surface 442 have at least one mask having an inflection point.

The fifth lens 450 has a negative refractive power and is made of a plastic material. The object side surface 441 is concave at the near optical axis 480, and the image side surface 442 is concave at the near optical axis 480, and the object side surface 441 and the image side are Surface 442 is aspherical.

The infrared filter element 460 is made of glass and disposed between the fifth lens 450 and the imaging surface 470 without affecting the focal length of the five-piece imaging lens set.

The equation of the aspheric curve described above is expressed in the form of the first embodiment, and will not be described herein.

In the five-piece imaging lens group of the fourth embodiment, the five-piece imaging lens group The overall focal length is f, the overall aperture value (f-number) of the five-piece imaging lens group is Fno, and the angle of the five-piece imaging lens group is 2 ω, and the values are as follows: f = 3.7166 mm (mm); Fno = 2.0; and 2 ω = 80 degrees.

In the five-piece imaging lens set of the fourth embodiment, the focal length of the first lens 410 is f1, the focal length of the second lens 420 is f2, and the following condition is satisfied: f1/f2=-0.6087.

In the five-piece imaging lens set of the fourth embodiment, the focal length of the second lens 420 is f2, and the focal length of the fourth lens 440 is f4, and the following condition is satisfied: f2/f4=-2.7711.

In the five-piece imaging lens set of the fourth embodiment, the focal length of the fourth lens 440 is f4, and the focal length of the fifth lens 450 is f5, and the following condition is satisfied: f4/f5=-1.0700.

In the five-piece imaging lens set of the fourth embodiment, the focal length of the first lens 410 is f1, the combined focal length of the second lens 420 and the third lens 430 is f23, and the following condition is satisfied: f1/f23=-0.7214 .

In the five-piece imaging lens set of the fourth embodiment, the combined focal length of the second lens 420 and the third lens 430 is f23, and the focal length of the fourth lens 440 is f4, and the following condition is satisfied: f23/f4=-2.3380.

In the five-piece imaging lens set of the fourth embodiment, the focal length of the first lens 410 is f1, and the combined focal length of the second lens 420, the third lens 430 and the fourth lens 440 is f234. And the following conditions are met: f1/f234=1.5521.

In the five-piece imaging lens set of the fourth embodiment, the combined focal length of the second lens 420, the third lens 430 and the fourth lens 440 is f234, and the focal length of the fifth lens 450 is f5, and the following condition is met: f234 /f5=-1.1628.

In the five-piece imaging lens set of the fourth embodiment, the combined focal length of the first lens 410 and the second lens 420 is f12, and the combined focal length of the third lens 430 and the fourth lens 440 is f34, and the following conditions are met. :f12/f34=3.0485.

In the five-piece imaging lens set of the fourth embodiment, the focal length of the second lens 420 is f2, the combined focal length of the third lens 430 and the fourth lens 440 is f34, and the following condition is satisfied: f2/f34=-2.6424 .

In the five-piece imaging lens set of the fourth embodiment, the combined focal length of the third lens 430 and the fourth lens 440 is f34, and the focal length of the fifth lens 450 is f5, and the following condition is satisfied: f34/f5=-1.1221 .

In the five-piece imaging lens set of the fourth embodiment, the combined focal length of the first lens 410 and the second lens 420 is f12, and the combined focal length of the third lens 430, the fourth lens 440 and the fifth lens 450 is F345, and meet the following conditions: f12/f345=0.3803.

In the five-piece imaging lens set of the fourth embodiment, the combined focal length of the first lens 410, the second lens 420 and the third lens 430 is f123, and the focal length of the fifth lens 450 is f5, and the following condition is met: f123 /f5=-3.7301.

The five-piece imaging lens set of the fourth embodiment, the overall focal length of the five-piece imaging lens set is f, the distance from the object side surface 411 of the first lens 410 to the imaging surface 470 on the optical axis 480 is TL, and The following conditions are met: f/TL = 0.7910.

Refer to Table 7 and Table 8 below for reference. Table 7 is the detailed structural data of the fourth embodiment of Fig. 4A. Table 8 shows the aspherical data in the fourth embodiment.

<Fifth Embodiment>

Please refer to FIG. 5A and FIG. 5B , wherein FIG. 5A illustrates the fifth embodiment according to the present invention. A schematic diagram of a five-piece imaging lens set of the embodiment, and FIG. 5B is a left-to-right sequence of spherical aberration, astigmatism, and distortion of the five-piece imaging lens set of the fifth embodiment. As can be seen from FIG. 5A, the five-piece imaging lens group includes an aperture 500, a first lens 510, a second lens 520, a third lens 530, and a fourth lens 540, one from the object side to the image side. A fifth lens 550, an infrared filter filter element 560, and an imaging surface 570.

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 580, and the image side surface 512 is convex at the near optical axis 580, 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 580, and the image side surface 522 is concave at the near optical axis 580, 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 580, and the image side surface 532 is concave at the near optical axis 580, and the object side surface 531 and the image side are The surface 532 is aspherical, and the object side surface 531 and the image side surface 532 have at least one mask having an inflection point.

The fourth lens 540 has a positive refractive power and is made of a plastic material. The object side surface 541 is convex at the near optical axis 580, and the image side surface 542 is convex at the near optical axis 580, and the object side surface 541 and the image side are The surface 542 is aspherical, and the object side surface 541 and the image side surface 542 have at least one mask having an inflection point.

The fifth lens 550 has a negative refractive power and is made of a plastic material. The object side surface 541 is concave at the near optical axis 580, and the image side surface 542 is concave at the near optical axis 580, and the object side surface 541 and the image side are Surface 542 is aspherical.

The infrared filter element 560 is made of glass and disposed between the fifth lens 550 and the imaging surface 570 without affecting the focal length of the five-piece imaging lens group.

The equation of the aspheric curve described above is expressed in the form of the first embodiment, and will not be described herein.

In the five-piece imaging lens set of the fifth embodiment, the overall focal length of the five-piece imaging lens group is f, the overall aperture value (f-number) of the five-piece imaging lens group is Fno, and the five-piece imaging lens group The angle of drawing is 2 ω, and its value is as follows: f = 4.0454 mm (mm); Fno = 2.0; and 2 ω = 75 degrees.

In the five-piece imaging lens set of the fifth embodiment, the focal length of the first lens 510 is f1, the focal length of the second lens 520 is f2, and the following condition is satisfied: f1/f2 = -0.6170.

In the five-piece imaging lens set of the fifth embodiment, the focal length of the second lens 520 is f2, and the focal length of the fourth lens 540 is f4, and the following condition is satisfied: f2/f4=-2.6123.

In the five-piece imaging lens set of the fifth embodiment, the focal length of the fourth lens 540 is f4, and the focal length of the fifth lens 550 is f5, and the following condition is satisfied: f4/f5=-1.0805.

In the five-piece imaging lens set of the fifth embodiment, the focal length of the first lens 510 is f1, the combined focal length of the second lens 520 and the third lens 530 is f23, and the following condition is satisfied: f1/f23=-0.7391 .

In the five-piece imaging lens set of the fifth embodiment, the combined focal length of the second lens 520 and the third lens 530 is f23, and the fourth lens 540 has a focal length of f4 and satisfies the following condition: f23/f4=-2.1808.

In the five-piece imaging lens set of the fifth embodiment, the focal length of the first lens 510 is f1, the combined focal length of the second lens 520, the third lens 530 and the fourth lens 540 is f234, and the following conditions are met: f1 /f234=1.5251.

The five-piece imaging lens set of the fifth embodiment, the second lens 520, the third mirror The combined focal length of the sheet 530 and the fourth lens 540 is f234, and the focal length of the fifth lens 550 is f5, and the following condition is satisfied: f234/f5=-1.1419.

In the five-piece imaging lens set of the fifth embodiment, the combined focal length of the first lens 510 and the second lens 520 is f12, and the combined focal length of the third lens 530 and the fourth lens 540 is f34, and the following conditions are met. :f12/f34=2.9181.

In the five-piece imaging lens set of the fifth embodiment, the focal length of the second lens 520 is f2, the combined focal length of the third lens 530 and the fourth lens 540 is f34, and the following condition is satisfied: f2/f34=-2.4911 .

In the five-piece imaging lens set of the fifth embodiment, the combined focal length of the third lens 530 and the fourth lens 540 is f34, and the focal length of the fifth lens 550 is f5, and the following condition is satisfied: f34/f5=-1.1331 .

In the five-piece imaging lens set of the fifth embodiment, the combined focal length of the first lens 510 and the second lens 520 is f12, and the combined focal length of the third lens 530, the fourth lens 540 and the fifth lens 550 is F345, and meet the following conditions: f12/f345=0.2430.

In the five-piece imaging lens set of the fifth embodiment, the combined focal length of the first lens 510, the second lens 520 and the third lens 530 is f123, and the combined focal length of the fifth lens 550 is f5, and the following conditions are met. :f123/f5=-3.6240.

In the five-piece imaging lens set of the fifth embodiment, the overall focal length of the five-piece imaging lens group is f, and the distance from the object side surface 511 of the first lens 510 to the imaging surface 570 on the optical axis 580 is TL, and The following conditions are met: f/TL = 0.8093.

Refer to Table 9 and Table 10 below. Table 9 is the detailed structural data of the fifth embodiment of Fig. 5A. Table 10 shows the aspherical data in the fifth embodiment.

<Sixth embodiment>

Please refer to FIG. 6A and FIG. 6B , wherein FIG. 6A is a schematic diagram of a five-piece imaging lens set according to a sixth embodiment of the present invention, and FIG. 6B is a five-piece sixth embodiment from left to right. The spherical aberration, astigmatism and distortion curves of the imaging lens group. As can be seen from Figure 6A, five-piece The imaging lens group includes an aperture 600, a first lens 610, a second lens 620, a third lens 630, a fourth lens 640, a fifth lens 650, and an infrared filter from the object side to the image side. Filter element 660 and an imaging surface 670.

The first lens 610 has a positive refractive power and is made of a plastic material. The object side surface 611 is convex at the near optical axis 680, and the image side surface 612 is convex at the near optical axis 680, and the object side surface 611 and the image side are Surface 612 is aspherical.

The second lens 620 has a negative refractive power and is made of a plastic material. The object side surface 621 is convex at the near optical axis 680, and the image side surface 622 is concave at the near optical axis 680, and the object side surface 621 and the image side are Surface 622 is aspherical.

The third lens 630 has a negative refractive power and is made of a plastic material. The object side surface 631 is convex at the near optical axis 680, and the image side surface 632 is concave at the near optical axis 680, and the object side surface 631 and the image side are The surface 632 is aspherical, and the object side surface 631 and the image side surface 632 have at least one mask having an inflection point.

The fourth lens 640 has a positive refractive power and is made of a plastic material. The object side surface 641 is convex at the near optical axis 680, and the image side surface 642 is convex at the near optical axis 680, and the object side surface 641 and the image side are The surface 642 is aspherical, and the object side surface 641 and the image side surface 642 have at least one mask having an inflection point.

The fifth lens 650 has a negative refractive power and is made of a plastic material. The object side surface 641 is concave at the near optical axis 680, and the image side surface 642 is concave at the near optical axis 680, and the object side surface 641 and the image side are Surface 642 is aspherical.

The infrared filter element 660 is made of glass and disposed between the fifth lens 650 and the imaging surface 670 without affecting the focal length of the five-piece imaging lens set.

The equation of the aspheric curve described above is expressed in the form of the first embodiment, and will not be described herein.

In the five-piece imaging lens set of the sixth embodiment, the overall focal length of the five-piece imaging lens group is f, the overall aperture value (f-number) of the five-piece imaging lens group is Fno, and the five-piece imaging lens group The angle of drawing is 2 ω, and its value is as follows: f = 3.9527 mm (mm); Fno = 2.0; and 2 ω = 75 degrees.

In the five-piece imaging lens set of the sixth embodiment, the focal length of the first lens 610 is f1, the focal length of the second lens 620 is f2, and the following condition is satisfied: f1/f2=-0.6246.

In the five-piece imaging lens set of the sixth embodiment, the focal length of the second lens 620 is f2, and the focal length of the fourth lens 640 is f4, and the following condition is satisfied: f2/f4=-2.6194.

In the five-piece imaging lens set of the sixth embodiment, the focal length of the fourth lens 640 is f4, and the focal length of the fifth lens 650 is f5, and the following condition is satisfied: f4/f5=-1.1045.

In the five-piece imaging lens set of the sixth embodiment, the focal length of the first lens 610 is f1, the combined focal length of the second lens 620 and the third lens 630 is f23, and the following condition is satisfied: f1/f23=-0.7304 .

In the five-piece imaging lens set of the sixth embodiment, the combined focal length of the second lens 620 and the third lens 630 is f23, and the focal length of the fourth lens 640 is f4, and the following condition is satisfied: f23/f4=-2.2399.

In the five-piece imaging lens set of the sixth embodiment, the focal length of the first lens 610 is f1, the combined focal length of the second lens 620, the third lens 630 and the fourth lens 640 is f234, and the following conditions are met: f1 /f234=1.5532.

In the five-piece imaging lens set of the sixth embodiment, the combined focal length of the second lens 620, the third lens 630 and the fourth lens 640 is f234, and the focal length of the fifth lens 650 is f5, and the following condition is met: f234 /f5=-1.1634.

In the five-piece imaging lens set of the sixth embodiment, the combined focal length of the first lens 610 and the second lens 620 is f12, and the combined focal length of the third lens 630 and the fourth lens 640 is f34, and the following conditions are met. :f12/f34=3.0283.

In the five-piece imaging lens set of the sixth embodiment, the focal length of the second lens 620 is f2, and the combined focal length of the third lens 630 and the fourth lens 640 is f34, and the following conditions are met: f2/f34=-2.5088 .

In the five-piece imaging lens set of the sixth embodiment, the combined focal length of the third lens 630 and the fourth lens 640 is f34, and the focal length of the fifth lens 650 is f5, and the following condition is satisfied: f34/f5=-1.1532 .

In the five-piece imaging lens set of the sixth embodiment, the combined focal length of the first lens 610 and the second lens 620 is f12, and the combined focal length of the third lens 630, the fourth lens 640 and the fifth lens 650 is F345, and meet the following conditions: f12/f345=0.2907.

In the five-piece imaging lens set of the sixth embodiment, the combined focal length of the first lens 610, the second lens 620 and the third lens 630 is f123, and the combined focal length of the fifth lens 650 is f5, and the following conditions are met. :f123/f45=-3.7748.

In the five-piece imaging lens set of the sixth embodiment, the overall focal length of the five-piece imaging lens group is f, and the distance from the object side surface 611 to the imaging surface 670 of the first lens 610 on the optical axis 680 is TL, and The following conditions are satisfied: f/TL = 0.8036.

Referring again to Table 11 and Table 12 below. Table 11 shows the detailed structural data of the sixth embodiment of Fig. 6A. Table 12 shows the aspherical data in the sixth embodiment.

<Seventh embodiment>

Please refer to FIG. 7A and FIG. 7B , wherein FIG. 7A is a schematic diagram of a five-piece imaging lens set according to a seventh embodiment of the present invention, and FIG. 7B is a fifth piece of the seventh embodiment from left to right. The spherical aberration, astigmatism and distortion curves of the imaging lens group. As can be seen from FIG. 7A, the five-piece imaging lens group includes an aperture 700, a first lens 710, a second lens 720, a third lens 730, and a fourth lens 740, one from the object side to the image side. Fifth lens 750, an infrared filter Light element 760 and an imaging surface 770.

The first lens 710 has a positive refractive power and is made of a plastic material. The object side surface 711 is convex at the near optical axis 780, and the image side surface 712 is convex at the near optical axis 780, and the object side surface 711 and the image side are Surface 712 is aspherical.

The second lens 720 has a negative refractive power and is made of a plastic material. The object side surface 721 is convex at the near optical axis 780, and the image side surface 722 is concave at the near optical axis 780, and the object side surface 721 and the image side are Surface 722 is aspherical.

The third lens 730 has a negative refractive power and is made of a plastic material. The object side surface 731 is convex at the near optical axis 780, and the image side surface 732 is concave at the near optical axis 780, and the object side surface 731 and the image side are The surface 732 is aspherical, and the object side surface 731 and the image side surface 732 have at least one mask having an inflection point.

The fourth lens 740 has a positive refractive power and is made of a plastic material. The object side surface 741 is convex at the near optical axis 780, and the image side surface 742 is convex at the near optical axis 780, and the object side surface 741 and the image side are The surface 742 is aspherical, and the object side surface 741 and the image side surface 742 have at least one mask having an inflection point.

The fifth lens 750 has a negative refractive power and is made of a plastic material. The object side surface 741 is concave at the near optical axis 780, and the image side surface 742 is concave at the near optical axis 780, and the object side surface 741 and the image side are Surface 742 is aspherical.

The infrared filter element 760 is made of glass and disposed between the fifth lens 750 and the imaging surface 770 without affecting the focal length of the five-piece imaging lens group.

The equation of the aspheric curve described above is expressed in the form of the first embodiment, and will not be described herein.

In the five-piece imaging lens set of the seventh embodiment, the overall focal length of the five-piece imaging lens group is f, and the overall aperture value (f-number) of the five-piece imaging lens group is Fno, five pieces. The imaging lens group has an angle of 2 ω and its values are as follows: f = 4.1072 mm (mm); Fno = 2.0; and 2 ω = 73 degrees.

In the five-piece imaging lens set of the seventh embodiment, the focal length of the first lens 710 is f1, the focal length of the second lens 720 is f2, and the following condition is satisfied: f1/f2=-0.6530.

In the five-piece imaging lens set of the seventh embodiment, the focal length of the second lens 720 is f2, and the focal length of the fourth lens 740 is f4, and the following condition is satisfied: f2/f4=-2.5776.

In the five-piece imaging lens set of the seventh embodiment, the focal length of the fourth lens 740 is f4, and the focal length of the fifth lens 750 is f5, and the following condition is satisfied: f4/f5=-1.0891.

In the five-piece imaging lens set of the seventh embodiment, the focal length of the first lens 710 is f1, the combined focal length of the second lens 720 and the third lens 730 is f23, and the following condition is satisfied: f1/f23=-0.7577 .

In the five-piece imaging lens set of the seventh embodiment, the combined focal length of the second lens 720 and the third lens 730 is f23, and the focal length of the fourth lens 740 is f4, and the following condition is satisfied: f23/f4=-2.2215.

In the five-piece imaging lens set of the seventh embodiment, the focal length of the first lens 710 is f1, the combined focal length of the second lens 720, the third lens 730 and the fourth lens 740 is f234, and the following conditions are met: f1 /f234=1.6445.

In the five-piece imaging lens set of the seventh embodiment, the combined focal length of the second lens 720, the third lens 730 and the fourth lens 740 is f234, and the focal length of the fifth lens 750 is f5, and the following condition is met: f234 /f5=-1.1147.

In the five-piece imaging lens set of the seventh embodiment, the combined focal length of the first lens 710 and the second lens 720 is f12, and the combined focal length of the third lens 730 and the fourth lens 740 It is f34 and satisfies the following conditions: f12/f34=3.2111.

In the five-piece imaging lens set of the seventh embodiment, the focal length of the second lens 720 is f2, and the combined focal length of the third lens 730 and the fourth lens 740 is f34, and the following condition is satisfied: f2/f34=-2.4840 .

In the five-piece imaging lens set of the seventh embodiment, the combined focal length of the third lens 730 and the fourth lens 740 is f34, and the focal length of the fifth lens 750 is f5, and the following condition is satisfied: f34/f5=-1.1301 .

In the five-piece imaging lens set of the seventh embodiment, the combined focal length of the first lens 710 and the second lens 720 is f12, and the combined focal length of the third lens 730, the fourth lens 740 and the fifth lens 750 is F345, and the following conditions are met: f12/f345=0.3635.

In the five-piece imaging lens set of the seventh embodiment, the combined focal length of the first lens 710, the second lens 720 and the third lens 730 is f123, and the combined focal length of the fifth lens 750 is f5, and the following conditions are met. :f123/f5=-3.9408.

The five-piece imaging lens set of the seventh embodiment, the overall focal length of the five-piece imaging lens set is f, the distance from the object side surface 711 of the first lens 710 to the imaging surface 770 on the optical axis 780 is TL, and The following conditions are met: f/TL = 0.7972.

Refer to Table 13 and Table 14 below. Table 13 shows the detailed structural data of the seventh embodiment of Fig. 7A. Table 14 shows the aspherical data in the seventh embodiment.

<Eighth Embodiment>

Please refer to FIG. 8A and FIG. 8B , wherein FIG. 8A is a schematic diagram of a five-piece imaging lens set according to an eighth embodiment of the present invention, and FIG. 8B is sequentially divided from left to right into five pieces of the eighth embodiment. The spherical aberration, astigmatism and distortion curves of the imaging lens group. As can be seen from FIG. 8A, the five-piece imaging lens group includes an aperture 800, a first lens 810, a second lens 820, a third lens 830, and a fourth lens 840, one from the object side to the image side. A fifth lens 850, an infrared filter filter element 860, and an imaging surface 870.

The first lens 810 has a positive refractive power and is made of a plastic material, and its object side surface 811 The near optical axis 880 is a convex surface, and the image side surface 812 is convex at the near optical axis 880, and the object side surface 811 and the image side surface 812 are all aspherical.

The second lens 820 has a negative refractive power and is made of a plastic material. The object side surface 821 is convex at the near optical axis 880, and the image side surface 822 is concave at the near optical axis 880, and the object side surface 821 and the image side are Surface 822 is aspherical.

The third lens 830 has a negative refractive power and is made of a plastic material. The object side surface 831 is convex at the near optical axis 880, and the image side surface 832 is concave at the near optical axis 880, and the object side surface 831 and the image side are The surface 832 is aspherical, and the object side surface 831 and the image side surface 832 have at least one mask having an inflection point.

The fourth lens 840 has a positive refractive power and is made of a plastic material. The object side surface 841 is convex at the near optical axis 880, and the image side surface 842 is convex at the near optical axis 880, and the object side surface 841 and the image side are The surface 842 is aspherical, and the object side surface 841 and the image side surface 842 have at least one mask having an inflection point.

The fifth lens 850 has a negative refractive power and is made of a plastic material. The object side surface 841 is concave at the near optical axis 880, and the image side surface 842 is concave at the near optical axis 880, and the object side surface 841 and the image side are Surface 842 is aspherical.

The infrared filter element 860 is made of glass and disposed between the fifth lens 850 and the imaging surface 870 without affecting the focal length of the five-piece imaging lens set.

The equation of the aspheric curve described above is expressed in the form of the first embodiment, and will not be described herein.

In the five-piece imaging lens group of the eighth embodiment, the overall focal length of the five-piece imaging lens group is f, and the overall aperture value (f-number) of the five-piece imaging lens group is Fno, a five-piece imaging lens group. The angle of drawing is 2 ω, and its value is as follows: f = 3.5615 mm (mm); Fno = 2.0; and 2 ω = 81 degrees.

In the five-piece imaging lens set of the eighth embodiment, the focal length of the first lens 810 is f1, the focal length of the second lens 820 is f2, and the following condition is satisfied: f1/f2 = -0.6100.

In the five-piece imaging lens set of the eighth embodiment, the focal length of the second lens 820 is f2, and the focal length of the fourth lens 840 is f4, and the following condition is satisfied: f2/f4=-2.7232.

In the five-piece imaging lens set of the eighth embodiment, the focal length of the fourth lens 840 is f4, and the focal length of the fifth lens 850 is f5, and the following condition is satisfied: f4/f5=-1.0728.

In the five-piece imaging lens set of the eighth embodiment, the focal length of the first lens 810 is f1, the combined focal length of the second lens 820 and the third lens 830 is f23, and the following condition is satisfied: f1/f23=-0.6758 .

In the five-piece imaging lens set of the eighth embodiment, the combined focal length of the second lens 820 and the third lens 830 is f23, and the focal length of the fourth lens 840 is f4, and the following condition is satisfied: f23/f4=-2.4582.

In the five-piece imaging lens set of the eighth embodiment, the focal length of the first lens 810 is f1, and the combined focal length of the second lens 820, the third lens 830, and the fourth lens 840 is f234, and the following conditions are met: f1 /f234=1.4815.

In the five-piece imaging lens set of the eighth embodiment, the combined focal length of the second lens 820, the third lens 830, and the fourth lens 840 is f234, and the focal length of the fifth lens 850 is f5, and the following condition is met: f234 /f5=-1.2030.

In the five-piece imaging lens set of the eighth embodiment, the combined focal length of the first lens 810 and the second lens 820 is f12, and the combined focal length of the third lens 830 and the fourth lens 840 is f34, and the following conditions are met. :f12/f34=3.0152.

The five-piece imaging lens set of the eighth embodiment, the focal length of the second lens 820 is F2, the combined focal length of the third lens 830 and the fourth lens 840 is f34, and the following condition is satisfied: f2/f34=-2.6125.

In the five-piece imaging lens set of the eighth embodiment, the combined focal length of the third lens 830 and the fourth lens 840 is f34, and the focal length of the fifth lens 850 is f5, and the following condition is satisfied: f34/f5=-1.1183 .

In the five-piece imaging lens set of the eighth embodiment, the combined focal length of the first lens 810 and the second lens 820 is f12, and the combined focal length of the third lens 830, the fourth lens 840 and the fifth lens 850 is F345, and meet the following conditions: f12/f345=0.4311.

In the five-piece imaging lens set of the eighth embodiment, the combined focal length of the first lens 810, the second lens 820 and the third lens 830 is f123, and the combined focal length of the fifth lens 850 is f5, and the following conditions are met. :f123/f5=-3.4597.

In the five-piece imaging lens set of the eighth embodiment, the overall focal length of the five-piece imaging lens group is f, and the distance from the object side surface 811 to the imaging surface 870 of the first lens 810 on the optical axis 880 is TL, and The following conditions are met: f/TL = 0.7960.

Refer to Table 15 and Table 16 below for reference. Table 15 is the detailed structural data of the eighth embodiment of Fig. 8A. Table 16 shows the aspherical data in the eighth embodiment.

<Ninth embodiment>

Please refer to FIG. 9A and FIG. 9B , wherein FIG. 9A is a schematic diagram of a five-piece imaging lens set according to a ninth embodiment of the present invention, and FIG. 9B is a five-piece ninth embodiment from left to right. The spherical aberration, astigmatism and distortion curves of the imaging lens group. As can be seen from FIG. 9A, the five-piece imaging lens group includes an aperture 900, a first lens 910, a second lens 920, a third lens 930, and a fourth lens 940, one from the object side to the image side. A fifth lens 950, an infrared filter filter element 960, and an imaging surface 970.

The first lens 910 has a positive refractive power and is made of a plastic material. The object side surface 911 is convex at the near optical axis 980, and the image side surface 912 is convex at the near optical axis 980, and the object side surface 911 and the image side are Surface 912 is aspherical.

The second lens 920 has a negative refractive power and is made of a plastic material, and its object side surface 921 The near optical axis 980 is convex, and the image side surface 922 is concave at the near optical axis 980, and the object side surface 921 and the image side surface 922 are all aspherical.

The third lens 930 has a positive refractive power and is made of a plastic material. The object side surface 931 is convex at the near optical axis 980, and the image side surface 932 is concave at the near optical axis 980, and the object side surface 931 and the image side are The surface 932 is aspherical, and the object side surface 931 and the image side surface 932 have at least one mask having an inflection point.

The fourth lens 940 has a positive refractive power and is made of a plastic material. The object side surface 941 is convex at the near optical axis 980, and the image side surface 942 is convex at the near optical axis 980, and the object side surface 941 and the image side are The surface 942 is aspherical, and the object side surface 941 and the image side surface 942 have at least one mask having an inflection point.

The fifth lens 950 has a negative refractive power and is made of a plastic material. The object side surface 941 is concave at the near optical axis 980, and the image side surface 942 is concave at the near optical axis 980, and the object side surface 941 and the image side are Surface 942 is aspherical.

The infrared filter element 960 is made of glass and disposed between the fifth lens 950 and the imaging surface 970 without affecting the focal length of the five-piece imaging lens set.

The equation of the aspheric curve described above is expressed in the form of the first embodiment, and will not be described herein.

In the five-piece imaging lens set of the ninth embodiment, the overall focal length of the five-piece imaging lens group is f, and the overall aperture value (f-number) of the five-piece imaging lens group is Fno, a five-piece imaging lens group. The angle of drawing is 2 ω, and its value is as follows: f = 3.5658 mm (mm); Fno = 2.0; and 2 ω = 81 degrees.

In the five-piece imaging lens set of the ninth embodiment, the focal length of the first lens 910 is f1, the focal length of the second lens 920 is f2, and the following condition is satisfied: f1/f2=-0.6064.

In the five-piece imaging lens set of the ninth embodiment, the focal length of the second lens 920 is f2, the focal length of the fourth lens 940 is f4, and the following condition is satisfied: f2/f4=-2.7295.

In the five-piece imaging lens set of the ninth embodiment, the focal length of the fourth lens 940 is f4, and the focal length of the fifth lens 950 is f5, and the following condition is satisfied: f4/f5=-1.1155.

In the five-piece imaging lens set of the ninth embodiment, the focal length of the first lens 910 is f1, the combined focal length of the second lens 920 and the third lens 930 is f23, and the following condition is satisfied: f1/f23=-0.6192 .

In the five-piece imaging lens set of the ninth embodiment, the combined focal length of the second lens 920 and the third lens 930 is f23, and the focal length of the fourth lens 940 is f4, and the following condition is satisfied: f23/f4=-2.6728.

In the five-piece imaging lens set of the ninth embodiment, the focal length of the first lens 910 is f1, and the combined focal length of the second lens 920, the third lens 930 and the fourth lens 940 is f234, and the following conditions are met: f1 /f234=1.5013.

In the five-piece imaging lens set of the ninth embodiment, the combined focal length of the second lens 920, the third lens 930 and the fourth lens 940 is f234, and the focal length of the fifth lens 950 is f5, and the following condition is satisfied: f234 /f5=-1.2298.

In the five-piece imaging lens set of the ninth embodiment, the combined focal length of the first lens 910 and the second lens 920 is f12, and the combined focal length of the third lens 930 and the fourth lens 940 is f34, and the following conditions are met. :f12/f34=3.0635.

In the five-piece imaging lens set of the ninth embodiment, the focal length of the second lens 920 is f2, and the combined focal length of the third lens 930 and the fourth lens 940 is f34, and the following condition is satisfied: f2/f34=-2.6577 .

The five-piece imaging lens set of the ninth embodiment, the combined focal length of the third lens 930 and the fourth lens 940 is f34, the focal length of the fifth lens 950 is f5, and the following condition is satisfied: f34/f5=-1.1456 .

In the five-piece imaging lens set of the ninth embodiment, the combined focal length of the first lens 910 and the second lens 920 is f12, and the combined focal length of the third lens 930, the fourth lens 940 and the fifth lens 950 is F345, and meet the following conditions: f12/f345=0.4026.

In the five-piece imaging lens set of the ninth embodiment, the combined focal length of the first lens 910, the second lens 920 and the third lens 930 is f123, and the focal length of the fifth lens 950 is f5, and the following condition is met: f123 /f5=-3.3972.

The five-piece imaging lens set of the ninth embodiment, the overall focal length of the five-piece imaging lens set is f, the distance from the object side surface 911 of the first lens 910 to the imaging surface 970 on the optical axis 980 is TL, and The following conditions are met: f/TL = 0.8023.

Referring again to Table 17 and Table 18 below. Table 17 shows the detailed structural data of the ninth embodiment of Fig. 9A. Table 18 is the aspherical data in the ninth embodiment.

<Tenth embodiment>

Please refer to FIG. 10A and FIG. 10B , wherein FIG. 10A is a schematic diagram of a five-piece imaging lens set according to a tenth embodiment of the present invention, and FIG. 10B is a five-piece tenth embodiment from left to right. The spherical aberration, astigmatism and distortion curves of the imaging lens group. As can be seen from FIG. 10A, the five-piece imaging lens group includes an aperture 1000, a first lens 1010, a second lens 1020, a third lens 1030, a fourth lens 1040, and a sequence from the object side to the image side. A fifth lens 1050, an infrared filter filter element 1060, and an imaging surface 1070.

The first lens 1010 has a positive refractive power and is made of a plastic material. The object side surface 1011 has a convex surface at a near optical axis 1080, and the image side surface 1012 has a convex surface at a near optical axis 1080, and the object side surface 1011 and the image side thereof. The surface 1012 is aspherical.

The second lens 1020 has a negative refractive power and is made of a plastic material. The object side surface 1021 has a convex surface at a near optical axis 1080, and the image side surface 1022 has a concave surface at a near optical axis 1080, and the object side surface Both the 1021 and the image side surface 1022 are aspherical.

The third lens 1030 has a positive refractive power and is made of a plastic material. The object side surface 1031 has a convex surface at a near optical axis 1080, and the image side surface 1032 has a concave surface at a near optical axis 1080, and the object side surface 1031 and the image side thereof. The surface 1032 is aspherical, and the object side surface 1031 and the image side surface 1032 have at least one mask having an inflection point.

The fourth lens 1040 has a positive refractive power and is made of a plastic material. The object side surface 1041 has a convex surface at a near optical axis 1080, and the image side surface 1042 has a convex surface at a near optical axis 1080, and the object side surface 1041 and the image side thereof. The surface 1042 is aspherical, and the object side surface 1041 and the image side surface 1042 have at least one mask having an inflection point.

The fifth lens 1050 has a negative refractive power and is made of a plastic material. The object side surface 1041 has a concave surface at a near optical axis 1080, and the image side surface 1042 has a concave surface at a near optical axis 1080, and the object side surface 1041 and the image side thereof. The surface 1042 is aspherical.

The infrared filter element 1060 is made of glass and disposed between the fifth lens 1050 and the imaging surface 1070 without affecting the focal length of the five-piece imaging lens group.

The equation of the aspheric curve described above is expressed in the form of the first embodiment, and will not be described herein.

In the five-piece imaging lens set of the tenth embodiment, the overall focal length of the five-piece imaging lens group is f, the overall aperture value (f-number) of the five-piece imaging lens group is Fno, and the five-piece imaging lens group The angle of drawing is 2 ω, and its value is as follows: f = 3.6490 mm (mm); Fno = 2.0; and 2 ω = 81 degrees.

In the five-piece imaging lens set of the tenth embodiment, the focal length of the first lens 1010 is f1, the focal length of the second lens 1020 is f2, and the following condition is satisfied: f1/f2=-0.6409.

The five-piece imaging lens set of the tenth embodiment, the focal length of the second lens 1020 is F2, the focal length of the fourth lens 1040 is f4, and the following condition is satisfied: f2/f4=-2.5718.

In the five-piece imaging lens set of the tenth embodiment, the focal length of the fourth lens 1040 is f4, the focal length of the fifth lens 1050 is f5, and the following condition is satisfied: f4/f5=-1.1925.

In the five-piece imaging lens set of the tenth embodiment, the focal length of the first lens 1010 is f1, the combined focal length of the second lens 1020 and the third lens 1030 is f23, and the following condition is satisfied: f1/f23=-0.5298 .

In the five-piece imaging lens set of the tenth embodiment, the combined focal length of the second lens 1020 and the third lens 1030 is f23, and the focal length of the fourth lens 1040 is f4, and the following condition is satisfied: f23/f4=-3.1109.

In the five-piece imaging lens set of the tenth embodiment, the focal length of the first lens 1010 is f1, and the combined focal length of the second lens 1020, the third lens 1030 and the fourth lens 1040 is f234, and the following conditions are met: f1 /f234=1.5748.

In the five-piece imaging lens set of the tenth embodiment, the combined focal length of the second lens 1020, the third lens 1030 and the fourth lens 1040 is f234, and the focal length of the fifth lens 1050 is f5, and the following condition is met: f234 /f5=-1.2481.

In the five-piece imaging lens set of the tenth embodiment, the combined focal length of the first lens 1010 and the second lens 1020 is f12, and the combined focal length of the third lens 1030 and the fourth lens 1040 is f34, and the following conditions are met. :f12/f34=3.7740.

In the five-piece imaging lens set of the tenth embodiment, the focal length of the second lens 1020 is f2, and the combined focal length of the third lens 1030 and the fourth lens 1040 is f34, and the following conditions are met: f2/f34=-2.9195 .

a five-piece imaging lens set of the tenth embodiment, the third lens 1030 and the fourth The combined focal length of the lens 1040 is f34, and the focal length of the fifth lens 1050 is f5, and the following condition is satisfied: f34/f5 = -1.0505.

In the five-piece imaging lens set of the tenth embodiment, the combined focal length of the first lens 1010 and the second lens 1020 is f12, and the combined focal length of the third lens 1030, the fourth lens 1040 and the fifth lens 1050 is F345, and meet the following conditions: f12/f345=0.4377.

In the five-piece imaging lens set of the tenth embodiment, the combined focal length of the first lens 1010, the second lens 1020 and the third lens 1030 is f123, and the focal length of the fifth lens 1050 is f5, and the following condition is met: f123 /f5=-3.2623.

In the five-piece imaging lens set of the tenth embodiment, the overall focal length of the five-piece imaging lens group is f, and the distance from the object side surface 1011 of the first lens 1010 to the imaging surface 1070 on the optical axis 1080 is TL, and The following conditions are satisfied: f/TL = 0.8160.

Referring again to Table 19 and Table 20 below. Table 19 shows the detailed structural data of the tenth embodiment of Fig. 10A. Table 20 shows the aspherical data in the tenth embodiment.

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, in the case of a lens having a refractive power, if the surface of the lens is convex and the position of the convex surface is not defined, it indicates that the surface of the lens is convex at the near optical axis; When the surface of the lens is concave and the concave position is not defined, it indicates that the surface of the lens is concave at the low beam axis. In addition, Table 21 is a correspondence table of each relational expression in each Example.

In the above, the above embodiments and the illustrations are only the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, that is, the equal variations and modifications made by the scope of the patent application of the present invention are It should be within the scope of the patent of the present invention.

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‧‧‧Infrared filter element

170‧‧‧ imaging surface

180‧‧‧ optical axis

Claims (14)

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 image side surface being convex, and the object side surface and the image side of the first lens At least one surface of the surface is aspherical; a second lens having a negative refractive power, the object side surface is convex, and the object side surface and the image side surface of the second lens have at least one side aspherical; a third lens, The image side surface is concave, and at least one side of the object side surface and the image side surface of the third lens is aspherical; a fourth lens having a positive refractive power, the object side surface is convex, and the fourth lens At least one side of the object side surface and the image side surface is aspherical; a fifth lens having a negative refractive power, the object side surface is a concave surface, and at least one side of the object side surface and the image side surface of the fifth lens is aspherical 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: -0.9 < f1/f23 < -0.3. The five-piece imaging lens set according to claim 1, wherein the object side surface and the image side surface of the third lens have at least one mask having an inflection point, and the object side surface and the image side of the fourth lens At least one mask on the surface has an inflection point. The five-piece imaging lens set according to claim 1, wherein the first lens has a focal length of f1, the second lens has a focal length of f2, and satisfies the following condition: -0.8<f1/f2<-0.4 . 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: -3.3<f2/f4<-2.0 . The five-piece imaging lens set according to claim 1, wherein the fourth lens has a focal length of f4, and the fifth lens has a focal length of f5 and satisfies the following condition: -1.4<f4/f5<-0.8 . 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 focal length of the fourth lens is f4, and the following condition is satisfied: -3.8<f23 /f4<-1.8. The five-piece imaging lens set according to claim 1, wherein the first lens has a focal length of f1, and the second lens, the third lens and the fourth lens have a combined focal length of f234, and the following conditions are met. :1.0<f1/f234<2.0. The five-piece imaging lens set according to claim 1, wherein the combined focal length of the second lens, the third lens and the fourth lens is f234, and the focal length of the fifth lens is f5, and the following conditions are met. :-1.6<f234/f5<-0.8. 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, and the combined focal length of the third lens and the fourth lens is f34, and satisfies The following conditions are: 2.0 < f12 / f34 < 4.5. The five-piece imaging lens set according to claim 1, wherein the second lens has a focal length of f2, and the combined focal length of the third lens and the fourth lens is f34, and the following condition is satisfied: -3.5< F2/f34<-1.7. 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, and the focal length of the fifth lens is f5, and the following condition is satisfied: -1.4< F34/f5<-0.8. 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, and the combined focal length of the third lens, the fourth lens and the fifth lens It is f345 and satisfies the following conditions: 0.1 < f12 / f345 < 0.6. 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 fifth lens has a focal length of f5 and satisfies The following conditions are: -4.2 <f123/f5 <-2.7. 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 meet the following conditions: 0.7 < f / TL < 0.9.