CN103163630B - Five-piece imaging lens set - Google Patents

Abstract

The invention relates to a five-piece imaging lens group, which comprises the following components in order from an object side to an image side: a diaphragm; the image side surface of the first lens is a convex surface, and at least one of the object side surface and the image side surface of the first lens is an aspheric surface; a second lens with negative refractive power, wherein the surface of the image side of the second lens is a concave surface, and at least one of the object side surface and the surface of the image side of the second lens is an aspheric surface; a third lens with positive refractive power, wherein the surface of the image side of the third lens is a convex surface, and at least one of the object side surface and the surface of the image side of the third lens is aspheric; a fourth lens element, wherein an object-side surface of the fourth lens element is concave, and at least one of the object-side surface and the image-side surface of the fourth lens element is aspheric; the fifth lens with negative refractive power has a convex object-side surface, and at least one of the object-side surface and the image-side surface of the fifth lens is aspheric, so that the fifth lens can be applied to a high-pixel mobile phone camera without causing the total length of the lens to be too long.

Description

Five-piece imaging lens set

technical field

The invention relates to an optical lens, in particular to a five-piece imaging lens group.

Background technique

In recent years, with the rise of mobile phone cameras, the demand for miniaturized photographic lenses has increased day by day, and the photosensitive components of general photographic lenses are nothing more than photocoupled devices (Charge Coupled Device, CCD) or complementary metal oxide semiconductors (Complementary Metal -Oxide Semiconductor, CMOS) two types, due to the advancement of semiconductor process technology, the pixel area of the photosensitive component is reduced, and the miniaturized photographic lens is gradually developing into the high-pixel field. Therefore, the requirements for image quality are also increasing.

Traditional miniaturized photographic lenses mounted on portable electronic products mostly adopt a four-piece lens structure. However, due to the rapid increase in the pixels of mobile phone cameras, the pixel area of photosensitive components is gradually shrinking. In the case of ever-increasing requirements, the ordinary four-piece lens group will not be able to meet the higher-level photographic lens modules, and electronic products are constantly developing towards thinner, lighter and higher performance.

Contents of the invention

The object of the present invention is to provide a five-piece imaging lens set, which can be applied to high-resolution mobile phone cameras, and does not make the total length of the lens too long.

The present invention provides a five-piece imaging lens set, which comprises in sequence from the object side to the image side: a diaphragm; a first lens with positive refractive power, the image side surface of which is convex, and the object side of the first lens At least one of the side surface and the image side surface is an aspherical surface; a second lens with negative refractive power, the image side surface is concave, and at least one of the object side surface and the image side surface of the second lens is an aspheric surface; A third lens with positive refractive power, whose image-side surface is convex, and at least one of the object-side surface and the image-side surface of the third lens is aspherical; a fourth lens, whose object-side surface is concave, and the fourth lens The object-side surface and the image-side surface of the lens are at least one aspheric surface; a fifth lens with negative refractive power, the object-side surface is convex, and at least one of the object-side surface and the image-side surface of the fifth lens is aspherical .

A five-element imaging lens set, which sequentially includes from the object side to the image side:

a light bar;

A first lens with positive refractive power, the image-side surface of which is convex, and at least one of the object-side surface and the image-side surface of the first lens is aspherical;

A second lens with negative refractive power, the image-side surface of which is concave, and at least one of the object-side surface and the image-side surface of the second lens is aspherical;

A third lens with positive refractive power, the image-side surface of which is convex, and at least one of the object-side surface and the image-side surface of the third lens is aspherical;

A fourth lens, the object-side surface of which is concave, and at least one of the object-side surface and the image-side surface of the fourth lens is aspherical;

A fifth lens with negative refractive power has a convex object-side surface, and at least one of the object-side surface and the image-side surface of the fifth lens is aspherical.

In the aforementioned five-piece imaging lens set, the focal length of the first lens is f1, and the focal length of the second lens is f2, both of which satisfy the following relationship: 0.3<|f1|/|f2|<1.0.

In the five-piece imaging lens set, the focal length of the second lens is f2, and the focal length of the third lens is f3, both of which satisfy the following relationship: 0.5<|f2|/|f3|<2.2.

In the five-piece imaging lens set, the focal length of the third lens is f3, and the focal length of the fourth lens is f4, both of which satisfy the following relationship: |f3|/|f4|<1.2.

In the five-piece imaging lens set, the focal length of the fourth lens is f4, and the focal length of the fifth lens is f5, both of which satisfy the following relationship: 1.0<|f4|/|f5|<5.5.

In the five-piece imaging lens set, the refractive index of the second lens is N2, and the Abbe coefficient of the second lens is V2, which satisfies the following relationship:

N2>1.57;

V2<40.

The five-piece imaging lens set, wherein the focal length of the first lens is f1, and the composite focal length of the second lens, the third lens, the fourth lens and the fifth lens is f2345, satisfying the following relationship: |f1| /|f2345|<1.1.

The five-piece imaging lens set, 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 is f345, satisfying the following relationship: | f12|/|f345|<2.5.

The five-piece imaging lens set, wherein the combined focal length of the first lens, the second lens and the third lens is f123, and the combined focal length of the fourth lens and the fifth lens is f45, satisfying the following relationship: | f123|/|f45|<1.2.

The five-piece imaging lens group, wherein the overall synthetic focal length of the five-piece imaging lens group is f, the distance between the object-side surface of the first lens and the imaging surface is TL, and both satisfy the following relationship: 0.5<|f/TL|<0.9.

The five-piece imaging lens set, wherein the material of the first lens is plastic, and the object-side surface of the first lens is convex, the object-side surface and the image-side surface of the first lens are both aspherical, the The material of the second lens is plastic, and the object-side surface of the second lens is convex, the object-side surface and the image-side surface of the second lens are both aspherical, the material of the third lens is plastic, and the third lens The object-side surface of the lens is concave, the object-side surface and the image-side surface of the third lens are aspherical, the material of the fourth lens is plastic, and the image-side surface of the fourth lens is convex, the fourth lens Both the object-side surface and the image-side surface of the fifth lens are aspherical, the material of the fifth lens is plastic, and the image-side surface of the fifth lens is concave, and the object-side surface and the image-side surface of the fifth lens are both aspherical .

The five-piece imaging lens set, wherein the material of the first lens is plastic, and the object-side surface of the first lens is convex, the object-side surface and the image-side surface of the first lens are both aspherical, the The material of the second lens is plastic, and the object-side surface of the second lens is concave, the object-side surface and the image-side surface of the second lens are both aspherical, the material of the third lens is plastic, and the third lens The object-side surface of the lens is concave, the object-side surface and the image-side surface of the third lens are aspherical, the material of the fourth lens is plastic, and the image-side surface of the fourth lens is convex, the fourth lens Both the object-side surface and the image-side surface of the fifth lens are aspherical, the material of the fifth lens is plastic, and the image-side surface of the fifth lens is concave, and the object-side surface and the image-side surface of the fifth lens are both aspherical .

The five-piece imaging lens set, wherein the material of the first lens is plastic, and the object-side surface of the first lens is convex, the object-side surface and the image-side surface of the first lens are both aspherical, the The material of the second lens is plastic, and the object-side surface of the second lens is convex, the object-side surface and the image-side surface of the second lens are both aspherical, the material of the third lens is plastic, and the third lens The object-side surface of the lens is convex, the object-side surface and the image-side surface of the third lens are aspherical, the material of the fourth lens is plastic, and the image-side surface of the fourth lens is convex, the fourth lens Both the object-side surface and the image-side surface of the fifth lens are aspherical, the material of the fifth lens is plastic, and the image-side surface of the fifth lens is concave, and the object-side surface and the image-side surface of the fifth lens are both aspherical .

In the five-piece imaging lens set of the present invention, the focal length of the first lens is f1, and the focal length of the second lens is f2, both of which satisfy the following relationship: 0.3<|f1|/|f2|<1.0. When |f1|/|f2| satisfies the above-mentioned relational expression, the imaging lens group can have a large picture angle, and at the same time, the resolution ability is significantly improved. On the contrary, if it exceeds the above-mentioned optical data value range, it will lead to wide-angle imaging. The performance and resolution of the lens group are low, and the yield rate is insufficient.

In the five-piece imaging lens set of the present invention, the focal length of the second lens is f2, and the focal length of the third lens is f3, both of which satisfy the following relationship: 0.5<|f2|/|f3|<2.2. When |f2|/|f3| satisfies the above-mentioned relational expression, the imaging lens group can have a large picture angle, and at the same time, the resolution ability is significantly improved. On the contrary, if it exceeds the above-mentioned optical data value range, it will lead to wide-angle imaging The performance and resolution of the lens group are low, and the yield rate is insufficient.

In the five-piece imaging lens set of the present invention, the focal length of the third lens is f3, and the focal length of the fourth lens is f4, both of which satisfy the following relationship: |f3|/|f4|<1.2. When |f3|/|f4| satisfies the above-mentioned relational expression, the imaging lens group can have a large picture angle, and at the same time, the resolution ability is significantly improved. On the contrary, if it exceeds the above-mentioned optical data value range, it will lead to wide-angle imaging. The performance and resolution of the lens group are low, and the yield rate is insufficient.

In the five-piece imaging lens set of the present invention, the focal length of the fourth lens is f4, and the focal length of the fifth lens is f5, both of which satisfy the following relationship: 1.0<|f4|/|f5|<5.5. When |f4|/|f5| satisfies the above-mentioned relational expression, the imaging lens group can have a large picture angle, and at the same time, the resolution ability is significantly improved. On the contrary, if it exceeds the above-mentioned optical data value range, it will lead to wide-angle imaging The performance and resolution of the lens group are low, and the yield rate is insufficient.

In the five-piece imaging lens set of the present invention, the refractive index of the second lens is N2, and the Abbe number of the second lens is V2, which satisfy the following relational expressions: N2>1.57; V2<40. When N2 and V2 satisfy the above-mentioned relational expressions, it is possible to reduce the volume while effectively flattening the peripheral image plane of the image, so as to improve the imaging quality of the peripheral image (i.e. peripheral dimming), and the arrangement of the lenses is the same as The configuration has a shorter optical overall length, allowing enough space for the IR cut filter to be configured.

The five-piece imaging lens set of the present invention, the focal length of the first lens is f1, and the composite focal length of the second lens, the third lens, the fourth lens and the fifth lens is f2345, satisfying the following relationship: |f1|/| f2345|<1.1. When |f1|/|f2345| satisfies the above-mentioned relational expression, the imaging lens group can have a large picture angle, and at the same time, the resolution ability is significantly improved. On the contrary, if the data value range of the above optical formula is exceeded, it will lead to wide-angle imaging. The performance and resolution of the lens group are low, and the yield rate is insufficient.

The five-piece imaging lens set of the present invention, the combined focal length of the first lens and the second lens is f12, the combined focal length of the third lens, the fourth lens and the fifth lens is f345, satisfying the following relationship: |f12| /|f345|<2.5. When |f12|/|f345| satisfies the above-mentioned relational expression, the imaging lens group can have a large picture angle, and at the same time, the resolution ability is significantly improved. On the contrary, if the data value range of the above optical formula is exceeded, it will lead to wide-angle imaging. The performance and resolution of the lens group are low, and the yield rate is insufficient.

The five-piece imaging lens set of the present invention, the combined focal length of the first lens, the second lens and the third lens is f123, the combined focal length of the fourth lens and the fifth lens is f45, satisfying the following relationship: |f123| /|f45|<1.2. When |f123|/|f45| satisfies the above-mentioned relational expression, the imaging lens group can have a large picture angle, and at the same time, the resolution ability is significantly improved. On the contrary, if the data value range of the above optical formula is exceeded, it will lead to wide-angle imaging. The performance and resolution of the lens group are low, and the yield rate is insufficient.

The five-piece imaging lens set of the present invention, wherein the overall synthetic focal length of the five-piece imaging lens set is f, the distance between the object-side surface of the first lens and the imaging surface is TL, and both satisfy the following relationship: 0.5 <|f/TL|<0.9. When |f/TL| satisfies the above-mentioned relational expression, it can have the characteristics of shorter optical total length and smaller size and lighter weight.

Description of drawings

FIG. 1A is an optical schematic diagram of the first embodiment of the present invention;

Fig. 1B is a spherical, non-point and distorted line diagram of the first embodiment of the present invention;

2A is an optical schematic diagram of a second embodiment of the present invention;

Fig. 2B is a spherical, non-point and distorted line diagram of the second embodiment of the present invention;

3A is an optical schematic diagram of a third embodiment of the present invention;

Fig. 3B is a spherical, non-point and distorted line diagram of the third embodiment of the present invention;

4A is an optical schematic diagram of a fourth embodiment of the present invention;

Fig. 4B is a spherical, aspheric and distorted line diagram of the fourth embodiment of the present invention.

Schedule Notes

The optical data of the first embodiment of Table 1;

Table 2 The aspheric surface data of the first embodiment;

The optical data of the second embodiment of Table 3;

Table 4 second embodiment aspherical data;

Table five third embodiment optical data;

Table six third embodiment aspherical data;

The optical data of the fourth embodiment of Table 7;

The aspheric surface data of the fourth embodiment of Table 8;

Table 9 is the numerical data of the correlation formula of the present invention.

Explanation of reference signs

100, 200, 300, 400 are light bars

110, 210, 310, 410 are the first lens

111, 211, 311, 411 are object side surfaces of the first lens

112, 212, 312, 412 are the image side surfaces of the first eyeglass

120, 220, 320, 420 are the second lens

121, 221, 321, 421 are object side surfaces of the second lens

122, 222, 322, 422 are the image side surfaces of the second eyeglass

130, 230, 330, 430 are the third lens

131, 231, 331, 431 are object side surfaces of the third lens

132, 232, 332, 432 are the image side surfaces of the third eyeglass

140, 240, 340, 440 are the fourth lens

141, 241, 341, 441 are object side surfaces of the fourth lens

142,242,342,442 are the image side surfaces of the fourth eyeglass

150, 250, 350, 450 are the fifth lens

151, 251, 351, 451 are object side surfaces of the fifth lens

152, 252, 352, 452 are the image side surfaces of the fifth lens

160, 260, 360, 460 are infrared filter filters (IR Filter)

170, 270, 370, 470 are imaging planes

180, 280, 380, 480 are optical axes

390, 490 are protective glass (Cover Glass)

Detailed ways

In order to achieve the above object, the present invention uses techniques, means and other effects, hereby give four preferred feasible embodiments and cooperate with the drawings to describe in detail as follows:

first embodiment

A five-piece imaging lens set provided by the first embodiment of the present invention, please refer to Figures 1A and 1B, the figure 1A is a schematic configuration diagram of the five-piece imaging lens set according to the first embodiment of the present invention, and Figure 1B is the first embodiment of the present invention An embodiment of the aberration curve diagram, the first embodiment from the object side A to the image side B includes:

One light bar 100.

A first lens 110 with positive refractive power is made of plastic. The object side surface 111 of the first lens 110 is a convex surface, and the image side surface 112 is a convex surface. The surfaces 112 are all aspherical.

A second lens 120 with negative refractive power is made of plastic. The object side surface 121 of the second lens 120 is convex, and the image side surface 122 is concave. The surfaces 122 are all aspherical.

A third lens 130 with positive refractive power is made of plastic. The object side surface 131 of the third lens 130 is concave, and the image side surface 132 is convex. The surfaces 132 are all aspherical.

A fourth lens 140 with negative refractive power is made of plastic. The object side surface 141 of the fourth lens 140 is concave, and the image side surface 142 is convex. The object side surface 141 of the fourth lens 140 and the image side The surfaces 142 are all aspherical.

A fifth lens 150 with negative refractive power is made of plastic. The object side surface 151 of the fifth lens 150 is convex, and the image side surface 152 is concave. The surfaces 152 are all aspherical.

An infrared filter filter (IR-filter) 160 is located between the image side surface 152 of the fifth lens 150 and an imaging surface 170. The material of the infrared filter filter 160 is glass and does not affect the The focal length of the five-element imaging lens set.

The equation of the above-mentioned aspheric curve is expressed as follows:

$\mathrm{<span\; class="notranslate">\; z</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; ch</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>{<span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; k</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>{\mathrm{<span\; class="notranslate">\; c</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; h</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; ]</span>}^{\mathrm{<span\; class="notranslate">\; 0.5</span>}}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Ah</span>}}^{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Bh</span>}}^{\mathrm{<span\; class="notranslate">\; 6</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Ch</span>}}^{\mathrm{<span\; class="notranslate">\; 8</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Dh</span>}}^{\mathrm{<span\; class="notranslate">\; 10</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Eh</span>}}^{\mathrm{<span\; class="notranslate">\; 12</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Gh</span>}}^{\mathrm{<span\; class="notranslate">\; 14</span>}}<span\; class="notranslate">\; +</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>$

Among them, z is the position value at the position of height h along the optical axis 180, taking the surface vertex as a reference; k is the cone constant; c is the reciprocal of the radius of curvature; A, B, C, D, E, G, ... is the high-order aspheric coefficient.

In the first embodiment, the overall synthetic focal length of the five-piece imaging lens set is f, and its relationship is: f=3.69.

In the first embodiment, the overall aperture value (f-number) of the five-piece imaging lens set is Fno, and its relationship is: Fno=2.2.

In the first embodiment, the picture angle of the five-piece imaging lens group is 2ω, and its relational expression is:

In the first embodiment, the refractive index of the second lens 120 is N2, and the Abbe coefficient of the second lens 120 is V2, and the relationship is: N2=1.632; V2=23.

In the first embodiment, the focal length of the first lens 110 is f1, and the focal length of the second lens 120 is f2, and the relationship is: |f1|/|f2|=0.5141.

In the first embodiment, the focal length of the second lens 120 is f2, and the focal length of the third lens 130 is f3, and the relationship is: |f2|/|f3|=1.8163.

In the first embodiment, the focal length of the third lens 130 is f3, and the focal length of the fourth lens 140 is f4, and the relationship is: |f3|/|f4|=0.2049.

In 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 relationship is: |f4|/|f5|=3.9554.

In the first embodiment, the focal length of the first lens 110 is f1, and the composite focal length of the second lens 120, the third lens 130, the fourth lens 140, and the fifth lens 150 is f2345, and the relationship is: |f1| /|f2345|=0.5012.

In the first embodiment, the combined focal length of the first lens 110 and the second lens 120 is f12, the combined focal length of the third lens 130, the fourth lens 140 and the fifth lens 150 is f345, and the relationship is: f12|/|f345|=0.1175.

In the first embodiment, the composite focal length of the first lens 110, the second lens 120, and the third lens 130 is f123, the composite focal length of the fourth lens 140 and the fifth lens 150 is f45, and the relationship is: f123|/|f45|=0.9422.

In the first embodiment, the overall composite focal length of the five-piece imaging lens group is f, the distance between the object-side surface 111 of the first lens 110 and the imaging surface 170 is TL, and the relationship is: |f/TL |=0.7432.

The detailed structural data of the first embodiment are as shown in Table 1, and its aspheric surface data are as shown in Table 2, wherein the units of the radius of curvature, thickness and focal length are millimeters (mm), and the values contained in Tables 1 and 2 Surfaces 2 and 3 are respectively the object and image side surfaces 111 and 112 of the first lens 110, surfaces 4 and 5 are respectively the object and image side surfaces 121 and 122 of the second lens 120, and surfaces 6 and 7 are respectively the object and image side surfaces 111 and 112 of the second lens 120. The object of three mirrors 130, as side surfaces 131,132, surface 8,9 are respectively the object of this 4th eyeglass 140, as side surfaces 141,142, surface 10,11 are respectively the object of this 5th eyeglass 150, as side Surfaces 151,152.

second embodiment

A five-piece imaging lens set provided by the second embodiment of the present invention, please refer to Figure 2A, 2B, the figure 2A is a schematic configuration diagram of the five-piece imaging lens set of the second embodiment of the present invention, and Figure 2B is the first embodiment of the present invention The aberration curve diagram of the second embodiment, the second embodiment includes from the object side A to the image side B:

One light bar 200.

A first lens 210 with positive refractive power is made of plastic. The object side surface 211 of the first lens 210 is a convex surface, and the image side surface 212 is a convex surface. The surfaces 212 are all aspherical.

A second lens 220 with negative refractive power is made of plastic. The object side surface 221 of the second lens 220 is convex, and the image side surface 222 is concave. The surfaces 222 are all aspherical.

A third lens 230 with positive refractive power is made of plastic. The object side surface 231 of the third lens 230 is concave, and the image side surface 232 is convex. The object side surface 231 of the third lens 230 is connected to the image side The surfaces 232 are all aspherical.

A fourth lens 240 with negative refractive power is made of plastic. The object side surface 241 of the fourth lens 240 is concave, and the image side surface 242 is convex. The object side surface 241 of the fourth lens 240 and the image side The surfaces 242 are all aspherical.

A fifth lens 250 with negative refractive power is made of plastic. The object side surface 251 of the fifth lens 250 is convex, and the image side surface 252 is concave. The surfaces 252 are all aspherical.

An infrared filter filter (IR-filter) 260, which is located between the fifth lens 250 image side surface 252 and an imaging surface 270, the material of the infrared filter filter 260 is glass and does not affect the The focal length of the five-element imaging lens set.

The equation of the above-mentioned aspheric curve is expressed as follows:

$\mathrm{<span\; class="notranslate">\; z</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; ch</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>{<span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; k</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>{\mathrm{<span\; class="notranslate">\; c</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; h</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; ]</span>}^{\mathrm{<span\; class="notranslate">\; 0.5</span>}}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Ah</span>}}^{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Bh</span>}}^{\mathrm{<span\; class="notranslate">\; 6</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Ch</span>}}^{\mathrm{<span\; class="notranslate">\; 8</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Dh</span>}}^{\mathrm{<span\; class="notranslate">\; 10</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Eh</span>}}^{\mathrm{<span\; class="notranslate">\; 12</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Gh</span>}}^{\mathrm{<span\; class="notranslate">\; 14</span>}}<span\; class="notranslate">\; +</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>$

Among them, z is the position value at the position of height h along the optical axis 280, taking the surface vertex as a reference; k is the cone constant; c is the reciprocal of the radius of curvature; A, B, C, D, E, G, ... is the high-order aspheric coefficient.

In the second embodiment, the overall composite focal length of the five-piece imaging lens set is f, and its relationship is: f=2.86.

In the second embodiment, the overall aperture value (f-number) of the five-piece imaging lens set is Fno, and its relationship is: Fno=2.4.

In the second embodiment, the picture angle of the five-piece imaging lens group is 2ω, and its relational expression is:

In the second embodiment, the refractive index of the second lens 220 is N2, and the Abbe coefficient of the second lens 220 is V2, and the relational formula is: N2=1.632; V2=23.

In 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 relationship is: |f1|/|f2|=0.5715.

In the second embodiment, the focal length of the second lens 220 is f2, and the focal length of the third lens 230 is f3, and the relationship is: |f2|/|f3|=1.0748.

In the second embodiment, the focal length of the third lens 230 is f3, the focal length of the fourth lens 240 is f4, and the relational expression is: |f3|/|f4|=0.0627.

In the second embodiment, the focal length of the fourth lens 240 is f4, the focal length of the fifth lens 250 is f5, and the relationship is: |f4|/|f5|=5.4373.

In the second embodiment, the focal length of the first lens 210 is f1, and the composite focal length of the second lens 220, the third lens 230, the fourth lens 240, and the fifth lens 250 is f2345, and the relationship is: |f1| /|f2345|=0.0890.

In the second embodiment, the combined focal length of the first lens 210 and the second lens 220 is f12, the combined focal length of the third lens 230, the fourth lens 240 and the fifth lens 250 is f345, and the relationship is: f12|/|f345|=0.8478.

In the second embodiment, the combined focal length of the first lens 210, the second lens 220, and the third lens 230 is f123, the combined focal length of the fourth lens 240 and the fifth lens 250 is f45, and the relationship is: f123|/|f45|=0.2889.

In the second embodiment, the overall synthetic focal length of the five-piece imaging lens group is f, the distance between the object-side surface 211 of the first lens 210 and the imaging surface 270 is TL, and the relationship is: |f/TL |=0.6526.

The detailed structural data of the second embodiment is as shown in Table 3, and its aspheric surface data is as shown in Table 4, wherein the units of the radius of curvature, thickness and focal length are millimeters (mm), and the data contained in Tables 3 and 4 Surfaces 2 and 3 are respectively the object and image side surfaces 211 and 212 of the first lens 210, surfaces 4 and 5 are respectively the object and image side surfaces 221 and 222 of the second lens 220, and surfaces 6 and 7 are respectively the The object of three mirrors 230, as side surfaces 231,232, surfaces 8,9 are respectively objects of this fourth eyeglass 240, image side surfaces 241,242, and surfaces 10,11 are respectively the object of this fifth eyeglass 250, image side Surfaces 251,252.

third embodiment

A five-piece imaging lens set provided by the third embodiment of the present invention, please refer to Figure 3A, 3B, the figure 3A is a schematic configuration diagram of the five-piece imaging lens set according to the third embodiment of the present invention, and Figure 3B is a schematic diagram of the configuration of the fifth imaging lens set of the present invention The aberration curves of the three embodiments, the third embodiment includes from the object side A to the image side B:

One light bar 300.

A first lens 310 with positive refractive power is made of plastic. The object side surface 311 of the first lens 310 is convex, and the image side surface 312 is convex. The object side surface 311 of the first lens 310 is connected to the image side The surfaces 312 are all aspherical.

A second lens 320 with negative refractive power is made of plastic. The object side surface 321 of the second lens 320 is concave, and the image side surface 322 is concave. The object side surface 321 of the second lens 320 and the image side The surfaces 322 are all aspherical.

A third lens 330 with positive refractive power is made of plastic. The object side surface 331 of the third lens 330 is concave, and the image side surface 332 is convex. The object side surface 331 of the third lens 330 and the image side The surfaces 332 are all aspherical.

A fourth lens 340 with negative refractive power is made of plastic. The object side surface 341 of the fourth lens 340 is concave and the image side surface 342 is convex. The object side surface 341 of the fourth lens 340 is connected to the image side. The surfaces 342 are all aspherical.

A fifth lens 350 with negative refractive power is made of plastic. The object side surface 351 of the fifth lens 350 is convex, and the image side surface 352 is concave. The surfaces 352 are all aspherical.

An infrared filter filter (IR-filter) 360, which is located between the image side surface 352 of the fifth lens 350 and an imaging surface 370, the material of the infrared filter filter 360 is glass and does not affect the The focal length of the five-element imaging lens set.

A cover glass (Cover Glass) 390, which is located between the infrared filter 360 and the imaging surface 370, so that the material of the cover glass 390 is glass and does not affect the focal length of the five-piece imaging lens group, The protective glass 390 is used to protect the sensing components (not shown in the figure).

The equation of the above-mentioned aspheric curve is expressed as follows:

$\mathrm{<span\; class="notranslate">\; z</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; ch</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>{<span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; k</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>{\mathrm{<span\; class="notranslate">\; c</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; h</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; ]</span>}^{\mathrm{<span\; class="notranslate">\; 0.5</span>}}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Ah</span>}}^{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Bh</span>}}^{\mathrm{<span\; class="notranslate">\; 6</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Ch</span>}}^{\mathrm{<span\; class="notranslate">\; 8</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Dh</span>}}^{\mathrm{<span\; class="notranslate">\; 10</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Eh</span>}}^{\mathrm{<span\; class="notranslate">\; 12</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Gh</span>}}^{\mathrm{<span\; class="notranslate">\; 14</span>}}<span\; class="notranslate">\; +</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>$

Among them, z is the position value at the position of height h along the optical axis 380, taking the surface vertex as a reference; k is the cone constant; c is the reciprocal of the radius of curvature; A, B, C, D, E, G, ... is the high-order aspheric coefficient.

In the third embodiment, the overall composite focal length of the five-piece imaging lens set is f, and its relationship is: f=5.63.

In the third embodiment, the overall aperture value (f-number) of the five-piece imaging lens set is Fno, and its relationship is: Fno=2.8.

In the third embodiment, the picture angle of the five-piece imaging lens group is 2ω, and its relational expression is:

In the third embodiment, the refractive index of the second lens 320 is N2, and the Abbe coefficient of the second lens 320 is V2, and the relationship is: N2=1.607; V2=27.

In 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 relationship is: |f1|/|f2|=0.6079.

In the third embodiment, the focal length of the second lens 320 is f2, the focal length of the third lens 330 is f3, and the relationship is: |f2|/|f3|=0.6935.

In the third embodiment, the focal length of the third lens 330 is f3, the focal length of the fourth lens 340 is f4, and the relational expression is: |f3|/|f4|=0.2579.

In the third embodiment, the focal length of the fourth lens 340 is f4, the focal length of the fifth lens 350 is f5, and the relationship is: |f4|/|f5|=3.8177.

In the third embodiment, the focal length of the first lens 310 is f1, and the composite focal length of the second lens 320, the third lens 330, the fourth lens 340, and the fifth lens 350 is f2345, and the relationship is: |f1| /|f2345|=0.7966.

In the third embodiment, the combined focal length of the first lens 310 and the second lens 320 is f12, the combined focal length of the third lens 330, the fourth lens 340 and the fifth lens 350 is f345, and the relationship is: f12|/|f345|=0.1362.

In the third embodiment, the combined focal length of the first lens 310, the second lens 320 and the third lens 330 is f123, the combined focal length of the fourth lens 340 and the fifth lens 350 is f45, and the relationship is: | f123|/|f45|=0.7710.

In the third embodiment, the overall composite focal length of the five-piece imaging lens group is f, the distance between the object-side surface 311 of the first lens 310 and the imaging surface 370 is TL, and the relationship is: |f/TL |=0.8014.

The detailed structural data of the third embodiment is as shown in Table 5, and its aspheric surface data is as shown in Table 6, wherein the units of the radius of curvature, thickness and focal length are millimeters (mm), and the values contained in Tables 5 and 6 Surfaces 2 and 3 are respectively the object and image side surfaces 311 and 312 of the first lens 310, surfaces 4 and 5 are respectively the object and image side surfaces 321 and 322 of the second lens 320, and surfaces 6 and 7 are respectively the object and image side surfaces 311 and 322 of the second lens 320. The object of three mirrors 330, as side surfaces 331,332, surface 8,9 are respectively the object of this 4th eyeglass 340, image side surfaces 341,342, surface 10,11 are respectively the object of this 5th eyeglass 350, image side Surfaces 351,352.

Fourth embodiment

A five-piece imaging lens set provided by the fourth embodiment of the present invention, please refer to Fig. 4A, 4B, this Fig. 4A is a schematic configuration diagram of the five-piece imaging lens set according to the fourth embodiment of the present invention, and Fig. 4B is a schematic diagram of the configuration of the five-piece imaging lens set according to the fourth embodiment of the present invention. The aberration curves of the four embodiments, the fourth embodiment includes from the object side A to the image side B:

One light bar 400.

A first lens 410 with positive refractive power is made of plastic. The object side surface 411 of the first lens 410 is convex, and the image side surface 412 is convex. The object side surface 411 of the first lens 410 is connected to the image side The surfaces 412 are all aspherical.

A second lens 420 with negative refractive power is made of plastic. The object side surface 421 of the second lens 420 is convex and the image side surface 422 is concave. The object side surface 421 of the second lens 420 is connected to the image side The surfaces 422 are all aspherical.

A third lens 430 with positive refractive power is made of plastic. The object side surface 431 of the third lens 430 is convex and the image side surface 432 is concave. The object side surface 431 of the third lens 430 is connected to the image side The surfaces 432 are all aspherical.

A fourth lens 440 with positive refractive power is made of plastic. The object side surface 441 of the fourth lens 440 is concave, and the image side surface 442 is convex. The object side surface 441 of the fourth lens 440 is connected to the image side The surfaces 442 are all aspherical.

A fifth lens 450 with negative refractive power is made of plastic. The object side surface 451 of the fifth lens 450 is convex, and the image side surface 452 is concave. The surfaces 452 are all aspherical.

An infrared filter filter (IR-filter) 460 is located between the image side surface 452 of the fifth lens 450 and an imaging surface 470. The material of the infrared filter filter 460 is glass and does not affect The focal length of the five-element imaging lens set.

A cover glass (Cover Glass) 490, which is arranged between the infrared filter filter 460 and the imaging surface 470, so that the material of the cover glass 490 is glass and does not affect the focal length of the five-piece imaging lens group, The protective glass 490 is used to protect the sensing components (not shown in the figure).

The equation of the above-mentioned aspheric curve is expressed as follows:

$\mathrm{<span\; class="notranslate">\; z</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; ch</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>{<span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; k</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>{\mathrm{<span\; class="notranslate">\; c</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; h</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; ]</span>}^{\mathrm{<span\; class="notranslate">\; 0.5</span>}}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Ah</span>}}^{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Bh</span>}}^{\mathrm{<span\; class="notranslate">\; 6</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Ch</span>}}^{\mathrm{<span\; class="notranslate">\; 8</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Dh</span>}}^{\mathrm{<span\; class="notranslate">\; 10</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Eh</span>}}^{\mathrm{<span\; class="notranslate">\; 12</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Gh</span>}}^{\mathrm{<span\; class="notranslate">\; 14</span>}}<span\; class="notranslate">\; +</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>$

Among them, z is the position value at the position of height h along the optical axis 480, taking the surface vertex as a reference; k is the cone constant; c is the reciprocal of the radius of curvature; A, B, C, D, E, G, ... is the high-order aspheric coefficient.

In the fourth embodiment, the overall composite focal length of the five-piece imaging lens set is f, and its relationship is: f=5.06.

In the fourth embodiment, the overall aperture value (f-number) of the five-piece imaging lens set is Fno, and its relationship is: Fno=2.8.

In the fourth embodiment, the picture angle of the five-piece imaging lens group is 2ω, and its relational expression is:

In the fourth embodiment, the refractive index of the second lens 420 is N2, and the Abbe coefficient of the second lens 420 is V2, and the relationship is: N2=1.607; V2=27.

In 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 relationship is: |f1|/|f2|=0.8434.

In the fourth embodiment, the focal length of the second lens 420 is f2, and the focal length of the third lens 430 is f3, and the relationship is: |f2|/|f3|=0.8238.

In the fourth embodiment, the focal length of the third lens 430 is f3, and the focal length of the fourth lens 440 is f4, and the relationship is: |f3|/|f4|=1.0301.

In 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 relationship is: |f4|/|f5|=1.2249.

In the fourth embodiment, the focal length of the first lens 410 is f1, and the composite focal length of the second lens 420, the third lens 430, the fourth lens 440, and the fifth lens 450 is f2345, and the relationship is: |f1| /|f2345|=0.1992.

In the fourth embodiment, the combined focal length of the first lens 410 and the second lens 420 is f12, the combined focal length of the third lens 430, the fourth lens 440 and the fifth lens 450 is f345, and the relationship is: f12|/|f345|=2.3910.

In the fourth embodiment, the combined focal length of the first lens 410, the second lens 420, and the third lens 430 is f123, the combined focal length of the fourth lens 440 and the fifth lens 450 is f45, and the relationship is: f123|/|f45|=0.0688.

In the fourth embodiment, the overall synthetic focal length of the five-piece imaging lens group is f, the distance between the object-side surface 411 of the first lens 410 and the imaging surface 470 is TL, and the relationship is: |f/TL |=0.7617.

The detailed structural data of the fourth embodiment are shown in Table 7, and its aspheric surface data are shown in Table 8, wherein the units of the radius of curvature, thickness and focal length are millimeters (mm), and the data contained in Tables 7 and 8 Surfaces 2 and 3 are object and image side surfaces 411 and 412 of the first lens 410 respectively, surfaces 4 and 5 are object and image side surfaces 421 and 422 of the second lens 420 respectively, and surfaces 6 and 7 are respectively the object and image side surfaces 411 and 412 of the second lens 420. The object of three mirrors 430, as side surfaces 431,432, surface 8,9 are respectively the object of this 4th eyeglass 440, as side surfaces 441,442, surface 10,11 are respectively the object of this 5th eyeglass 450, image side Surfaces 451,452.

It is worth noting that Tables 1 to 8 show the different numerical changes of various embodiments of the five-piece imaging lens set of the present invention. However, the numerical changes of each embodiment of the present invention are all experimental results. Even if different numerical values are used, the same Structured products still belong to the protection category of the present invention. Table 9 is a table corresponding to each relational expression in each embodiment.

In the five-piece imaging lens set of the present invention, the material of each lens can be glass or plastic. If the material of each lens is glass, the degree of freedom in the configuration of the refractive power of the five-piece imaging lens set can be increased. If the material of each lens is Plastics can effectively reduce production costs.

In the five-piece imaging lens set of the present invention, if the lens surface is convex, it means that the lens surface is convex at the near optical axis; if the lens surface is concave, it means that the lens surface is concave at the near optical axis.

Table I

Table II

Table three

Table four

Table five

Table six

Table seven

table eight

first embodiment second embodiment third embodiment Fourth embodiment f 3.69 2.86 5.63 5.06 Fno 2.2 2.4 2.8 2.8 2ω 75 90 68 70 N2 1.632 1.632 1.607 1.607 V2 twenty three twenty three 27 27 |f1|/|f2| 0.5141 0.5715 0.6079 0.8434 |f2|/|f3| 1.8163 1.0748 0.6935 0.8238 |f3|/|f4| 0.2049 0.0627 0.2579 1.0301 |f4|/|f5| 3.9554 5.4373 3.8177 1.2249 |f1|/|f2345| 0.5012 0.0890 0.7966 0.1992 |f12|/|f345| 0.1175 0.8478 0.1362 2.3910 |f123|/|f45| 0.9422 0.2889 0.7710 0.0688 |f/TL| 0.7432 0.6526 0.8014 0.7617

Table nine

Claims (12)

1. A five-piece imaging lens group, characterized in that: it includes sequentially from the object side to the image side: a light bar; A first lens with positive refractive power, the image-side surface of which is convex, and at least one of the object-side surface and the image-side surface of the first lens is aspherical; A second lens with negative refractive power, the image-side surface of which is concave, and at least one of the object-side surface and the image-side surface of the second lens is aspherical; A third lens with positive refractive power, the image-side surface of which is convex, and at least one of the object-side surface and the image-side surface of the third lens is aspherical; A fourth lens, the object-side surface of which is concave, and at least one of the object-side surface and the image-side surface of the fourth lens is aspherical; A fifth lens with negative refractive power, the object-side surface of which is convex, and at least one of the object-side surface and the image-side surface of the fifth lens is aspherical; 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, satisfying the following relationship: |f12|/|f345|<2.5. 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 second lens is f2, and both satisfy the following relationship: 0.3<|f1| /|f2|<1.0. 3. The five-piece imaging lens set according to claim 1, wherein the focal length of the second lens is f2, the focal length of the third lens is f3, and both satisfy the following relationship: 0.5<|f2| /|f3|<2.2. 4. 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 fourth lens is f4, and both satisfy the following relationship: |f3|/| f4|<1.2. 5. The five-piece imaging lens set according to claim 1, wherein the focal length of the fourth lens is f4, and the focal length of the fifth lens is f5, both of which satisfy the following relationship: 1.0<|f4| /|f5|<5.5. 6. The five-piece imaging lens set according to claim 1, wherein the refractive index of the second lens is N2, and the Abbe coefficient of the second lens is V2, which satisfies the following relationship: N2>1.57; V2<40. 7. The five-piece imaging lens set according to claim 1, wherein the focal length of the first lens is f1, and the composite focal length of the second lens, the third lens, the fourth lens and the fifth lens is f2345 , satisfy the following relationship: |f1|/|f2345|<1.1. 8. The five-piece imaging lens set according to claim 1, wherein the combined focal length of the first lens, the second lens and the third lens is f123, and the combined focal length of the fourth lens and the fifth lens is is f45, which satisfies the following relationship: |f123|/|f45|<1.2. 9. The five-piece imaging lens set according to claim 1, wherein the overall composite focal length of the five-piece imaging lens set is f, and the distance between the object-side surface of the first lens and the imaging surface is TL, both satisfy the following relationship: 0.5<|f/TL|<0.9. 10. The five-piece imaging lens set according to claim 1, wherein the material of the first lens is plastic, and the object-side surface of the first lens is convex, and the object-side surface of the first lens is in contact with The image-side surfaces are all aspherical, the material of the second lens is plastic, and the object-side surface of the second lens is convex, the object-side surface and the image-side surface of the second lens are both aspherical, and the third lens The material of the third lens is plastic, and the object-side surface of the third lens is concave, the object-side surface and the image-side surface of the third lens are both aspherical, the material of the fourth lens is plastic, and the image of the fourth lens is The side surface is convex, the object-side surface and the image-side surface of the fourth lens are aspherical, the material of the fifth lens is plastic, and the image-side surface of the fifth lens is concave, and the object-side surface of the fifth lens is Both the surface and the image side surface are aspherical. 11. The five-piece imaging lens set according to claim 1, wherein the material of the first lens is plastic, and the object-side surface of the first lens is convex, and the object-side surface of the first lens is in contact with The surface on the image side is both aspherical, the material of the second lens is plastic, and the object-side surface of the second lens is concave, the object-side surface and the image-side surface of the second lens are aspherical, the third lens The material of the third lens is plastic, and the object-side surface of the third lens is concave, the object-side surface and the image-side surface of the third lens are both aspherical, the material of the fourth lens is plastic, and the image of the fourth lens is The side surface is convex, the object-side surface and the image-side surface of the fourth lens are aspherical, the material of the fifth lens is plastic, and the image-side surface of the fifth lens is concave, and the object-side surface of the fifth lens is Both the surface and the image side surface are aspherical. 12. The five-piece imaging lens set according to claim 1, wherein the material of the first lens is plastic, and the object-side surface of the first lens is convex, and the object-side surface of the first lens is in contact with The image-side surfaces are all aspherical, the material of the second lens is plastic, and the object-side surface of the second lens is convex, the object-side surface and the image-side surface of the second lens are both aspherical, and the third lens The material of the third lens is plastic, and the object-side surface of the third lens is convex, the object-side surface and the image-side surface of the third lens are both aspherical, the material of the fourth lens is plastic, and the image of the fourth lens is The side surface is convex, the object-side surface and the image-side surface of the fourth lens are aspherical, the material of the fifth lens is plastic, and the image-side surface of the fifth lens is concave, and the object-side surface of the fifth lens is Both the surface and the image side surface are aspherical.