TWI451121B - Six-piece optical lens system - Google Patents

Description

Six-piece imaging lens set

The present invention relates to optical lenses, and more particularly to a six-piece imaging lens set.

Nowadays, the mainstream design of consumer electronic products will be equipped with a lens group on the carrier. The function of photography, photography or video will not only increase the added value of the product itself, but also attract the young people to seek new and changing preferences. The development of habits has caused the trend of the stock to gradually blow to other electronic carrier products, so now the public can see the lens group on each portable product, such as: digital camera, mobile phone, NB, game console or Webcam, etc. A large limitation of such an optical application product is that the electronic carrier is gradually miniaturized due to its appearance, resulting in a large compression of its internal space, and the length of the lens group mounted on the carrier is relatively limited.

Furthermore, with the fierce competition in the industry, the product gross profit is declining day by day. In order to create product segmentation, manufacturers continue to use electronic carriers with high-end lenses as the main demand for marketing, which means that it is not only necessary to reduce the manufacturing and material costs for the lens group. More needs to provide wide-angle and large aperture performance.

However, in the existing wide-angle imaging lens group, five optical lens lens groups are still the mainstream, and five optical lenses still include a glue lens. However, such a design obviously contradicts the light, thin, short, and small demands of the current optical lens group, and since the above wide-angle lens group includes five optical lenses, the cost, weight, and Volume, thickness, etc. can not be effectively reduced, and can not fully meet the needs of consumers.

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

The object of the present invention is to provide a six-piece imaging lens set which can be applied to a high-resolution mobile phone camera without causing the total length of the lens to be too long, and at the same time having a large picture angle, a large aperture, a high number of pictures, and a high resolution. A six-piece imaging lens set with the ability and low lens height.

Therefore, in order to achieve the foregoing object, a six-piece imaging lens set is provided according to the present invention, and includes a first lens having a negative refractive power, the image side surface being concave, and the first surface from the object side to the image side. At least one side of the object side surface and the image side surface of the lens is aspherical; a second lens having a positive refractive power, the image side surface is convex, and the object side surface and the image side surface of the second lens are at least one side non-spherical a spherical surface; a third lens having a positive refractive power, the object side surface being a convex surface; and a fourth lens having a negative refractive power, the image side surface is a concave surface, and the object side surface and the image side surface of the fourth lens are at least One side is aspherical; a fifth lens with positive refractive power, the object side surface is convex; a sixth lens with negative refractive power, the image side surface is concave, and the object side surface and image of the sixth lens At least one side of the side surface is aspherical; one of the third lens and the fifth lens is made of glass.

The six-piece imaging lens set of the present invention further includes a light barrier disposed between the first lens and the second lens.

The six-piece imaging lens set of the present invention further comprises a second lens disposed on the second lens A light barrier between the third lens.

In the six-piece imaging lens set of the present invention, the focal length of the first lens is f1, and the focal length of the third lens is f3, and both satisfy the following relationship: 0.6 <|f1|/|f3|<2.0. When |f1|/|f3| satisfies the foregoing relationship, the imaging lens group can have a large picture angle, a large aperture, a high number of pictures, and a low lens height, and the resolution capability is remarkably improved, and vice versa. The range of data values results in problems with the performance, low resolution, and insufficient yield of the six-piece imaging lens set.

In the six-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, and both satisfy the following relationship: 0.5<|f3|/|f4|<1.8. When |f3|/|f4| satisfies the foregoing relationship, the imaging lens group can have a large picture angle, a large aperture, a high number of pictures, and a low lens height, and the resolution capability is remarkably improved. The range of data values results in problems with the performance, low resolution, and insufficient yield of the six-piece imaging lens set.

In the six-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, and both satisfy the following relationship: 0.4<|f4|/|f5|<1.2. When |f4|/|f5| satisfies the foregoing relationship, the imaging lens group can have a large picture angle, a large aperture, a high number of pictures, and a low lens height, and the resolution capability is remarkably improved. The range of data values results in problems with the performance, low resolution, and insufficient yield of the six-piece imaging lens set.

In the six-piece imaging lens set of the present invention, the composite focal length of the first lens, the second lens and the third lens is f123, and the overall composite focal length of the six-piece imaging lens group is f, and the two satisfy the following relationship: 0.5<|f123|/|f|< 1.0. When |f123|/|f| satisfies the foregoing relationship, the imaging lens group can have a large picture angle, a large aperture, a high number of pictures, and a low lens height, and the resolution capability is remarkably improved. The range of data values results in problems with the performance, low resolution, and insufficient yield of the six-piece imaging lens set.

In the six-piece imaging lens set of the present invention, the composite focal length of the fourth lens, the fifth lens and the sixth lens is f456, and the overall composite focal length of the six-piece imaging lens group is f, and the two satisfy the following relationship: 2.5<|f456|/|f|<4.8. When |f456|/|f| satisfies the foregoing relationship, the imaging lens group can have a large picture angle, a large aperture, a high number of pictures, and a low lens height, and the resolution capability is remarkably improved. The range of data values results in problems with the performance, low resolution, and insufficient yield of the six-piece imaging lens set.

In the six-piece imaging lens set of the present invention, the focal length of the first lens is f1, and the combined focal length of the second lens and the third lens is f23, and the two satisfy the following relationship: 1.4<|f1|/|f23| 2.1. When |f1|/|f23| satisfies the foregoing relationship, the imaging lens group can have a large picture angle, a large aperture, a high number of pictures, and a low lens height, and the resolution capability is remarkably improved. The range of data values results in problems with the performance, low resolution, and insufficient yield of the six-piece imaging lens set.

In the six-piece imaging lens set of the present invention, the combined focal length of the second lens and the third lens is f23, and the combined focal length of the fourth lens and the fifth lens is f45, and the two satisfy the following relationship: |f23|/ |f45|<0.3. When |f23|/|f45| satisfies the foregoing relationship, the imaging lens group can have a large picture angle and a large light. Circle, high number of pictures and low lens height, while the resolution ability is significantly improved. Conversely, if the above optical data value range is exceeded, the performance, low resolution, and insufficient yield of the six-piece imaging lens group will be caused. .

In the six-piece imaging lens set of the present invention, the composite focal length of the second lens and the third lens is f23, and the combined focal length of the fifth lens and the sixth lens is f56, and the two satisfy the following relationship: 0.3<|f23 |/|f56|<0.8. When |f23|/|f56| satisfies the foregoing relationship, the imaging lens group can have a large picture angle, a large aperture, a high number of pictures, and a low lens height, and the resolution capability is remarkably improved. The range of data values results in problems with the performance, low resolution, and insufficient yield of the six-piece imaging lens set.

In the six-piece imaging lens set of the present invention, the overall composite focal length of the six-piece imaging lens set is f, and the distance between the object side surface of the first lens and the imaging surface is TL, and the two satisfy the following relationship: |f /TL|<0.5. When |f/TL| satisfies the foregoing relationship, it can have a shorter optical total length and is smaller and lighter.

In the six-piece imaging lens set of the present invention, the first lens is made of plastic, and the object side surface of the first lens is a convex surface, and the object side surface and the image side surface of the first lens are both aspherical, the second The material of the lens is plastic, and the object side surface of the second lens is a convex surface, the object side surface and the image side surface of the second lens are aspherical, the third lens is made of plastic, and the third lens is The image side surface and the image side surface are both aspherical, the fourth lens is made of plastic, and the object side surface of the fourth lens is concave, and the fourth lens is Both the side surface and the image side surface are aspherical, the fifth The material of the lens is glass, and the image side surface of the fifth lens is a convex surface, and the object side surface and the image side surface of the fifth lens are both spherical surfaces, and the sixth lens is made of plastic, and the sixth lens is made of a plastic material. The side surface is a convex surface, and both the object side surface and the image side surface of the sixth lens are aspherical.

In the six-piece imaging lens set of the present invention, the first lens is made of plastic, and the object side surface of the first lens is a convex surface, and the object side surface and the image side surface of the first lens are both aspherical, the second The material of the lens is plastic, and the object side surface of the second lens is a convex surface, the object side surface and the image side surface of the second lens are aspherical, the third lens is made of glass, and the third lens is The image side surface and the image side surface are both spherical surfaces, the fourth lens is made of plastic, and the object side surface of the fourth lens is concave. The object side surface and the image side surface of the fourth lens are both aspherical, the fifth lens is made of plastic, and the image side surface of the fifth lens is convex, and the object side surface and the image side surface of the fifth lens are both The material of the sixth lens is plastic, and the object side surface of the sixth lens is a convex surface, and the object side surface and the image side surface of the sixth lens are aspherical.

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

"First Embodiment"

For a six-piece imaging lens set provided by the first embodiment of the present invention, please refer to FIGS. 1A and 1B, which is a six-piece embodiment of the first embodiment of the present invention. FIG. 1B is a diagram showing aberrations of the first embodiment of the present invention. The first embodiment sequentially includes from the object side to the image side:

A first lens 110 having a negative 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 concave surface. The object side surface 111 and the image side of the first lens 110 are The surface 112 is set to be aspherical.

A second lens 120 having a positive refractive power is made of plastic. The object side surface 121 of the second lens 120 is a convex surface, the image side surface 122 is a convex surface, and the object side surface 121 and the image side of the second lens 120 are The surface 122 is set to be aspherical.

A light bar 100.

A third lens 130 having a positive refractive power is made of plastic. The object side surface 131 of the third lens 130 is a convex surface, and the image side surface 132 is a convex surface. The object side surface 131 and the image side of the third lens 130 are The surface 132 is set to be aspherical.

A fourth lens 140 having a negative refractive power is made of plastic, the object side surface 141 of the fourth lens 140 is a concave surface, the image side surface 142 is a concave surface, and the object side surface 141 and the image side of the fourth lens 140 are The surface 142 is set to be aspherical.

A fifth lens 150 having a positive refractive power is made of glass. The object side surface 151 of the fifth lens 150 is a convex surface, and the image side surface 152 is a convex surface. The object side surface 151 and the image side of the fifth lens 150 are The surface 152 is set to be a spherical surface.

A sixth lens 160 having a negative refractive power is made of plastic, the object side surface 161 of the sixth lens 160 is a convex surface, the image side surface 162 is a concave surface, and the object side surface 161 and the image side of the sixth lens 160 are The surface 162 is set to be aspherical.

An infrared filter (IR-filter) 170, which is disposed on the sixth mirror The sheet 160 is between the image side surface 162 and an image forming surface 180. The material of the infrared filter filter 170 is glass and does not affect the focal length of the six-piece imaging lens group.

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

Where z is the position value at the height h of the position along the optical axis 190 with reference to the surface apex; k is the cone constant metric; c is the reciprocal of the radius of curvature; A, B, C, D, E, G, .. .... is a high order aspheric coefficient.

In the first embodiment, the overall composite focal length of the six-piece imaging lens group is f, and the relationship is: f=4.27.

In the first embodiment, the overall aperture value (f-number) of the six-piece imaging lens group is Fno, and the relationship is Fno=2.6.

In the first embodiment, the six-piece imaging lens group has an angle of 2ω, and the relationship is: 2ω=70°.

In the first embodiment, the focal length of the first lens 110 is f1, and the focal length of the third lens 130 is f3, and the relationship is: |f1|/|f3|=1.656.

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|=0.774.

In 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 relationship is: |f4|/|f5|=0.923.

In the first embodiment, the composite focal length of the first lens 110, the second lens 120, and the third lens 130 is f123, and the overall composite focal length of the six-piece imaging lens group is f, and the relationship is: |f123 |/|f|=0.769.

In the first embodiment, the composite focal length of the fourth lens 140, the fifth lens 150, and the sixth lens 160 is f456, and the overall composite focal length of the six-piece imaging lens group is f, and the relationship is: |f456 |/|f|=2.974.

In the first embodiment, the focal length of the first lens 110 is f1, and the combined focal length of the second lens 120 and the third lens 130 is f23, and the relationship is: |f1|/|f23|=1.807.

In the first embodiment, the combined focal length of the second lens 120 and the third lens 130 is f23, and the combined focal length of the fourth lens 140 and the fifth lens 150 is f45, and the relationship is: |f23|/|f45| =0.138.

In the first embodiment, the combined focal length of the second lens 120 and the third lens 130 is f23, and the combined focal length of the fifth lens 150 and the sixth lens 160 is f56, and the relationship is: |f23|/|f56| =0.489.

In the first embodiment, the overall composite focal length of the six-piece imaging lens group is f, and the distance between the object side surface 111 of the first lens 110 and the imaging surface 180 is TL, and the relationship is: |f/TL |=0.266.

The detailed structural data of the first embodiment is as shown in Table 1 of FIG. 1C, and the aspherical data is as shown in Table 2 of FIG. 1D, wherein the unit of curvature radius, thickness and focal length is in mm (mm), and The surfaces 1 and 2 shown in Tables 1 and 2 are respectively the object of the first lens 110, the image side surfaces 111 and 112, and the surfaces 3 and 4 are the objects of the second lens 120 and the image side surfaces 121 and 122, respectively. The surfaces 6, 7 are respectively the object of the third lens 130, the image side surfaces 131, 132, and the surfaces 8, 9 are the object of the fourth lens 140, the image side surfaces 141, 142, the surface 12, 13 is the object of the sixth lens 160, and the image side surfaces 161 and 162, respectively.

Second Embodiment

For a six-piece imaging lens set provided by the second embodiment of the present invention, please refer to FIGS. 2A and 2B. FIG. 2A is a schematic view showing the configuration of a six-piece imaging lens set according to a second embodiment of the present invention, and FIG. In the second embodiment of the present invention, the second embodiment is sequentially included from the object side to the image side:

A first lens 210 having a negative 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 concave surface. The object side surface 211 and the image side of the first lens 210 are The surface 212 is set to be aspherical.

A light bar 200.

A second lens 220 having a positive refractive power is made of plastic. The object side surface 221 of the second lens 220 is a convex surface, the image side surface 222 is a convex surface, and the object side surface 221 and the image side of the second lens 220 are The surface 222 is set to be aspherical.

A third lens 230 having a positive refractive power is made of glass. The object side surface 231 of the third lens 230 is a convex surface, the image side surface 232 is a convex surface, and the object side surface 231 and the image side of the third lens 230 are formed. The surface 232 is set to be spherical.

A fourth lens 240 having a negative refractive power is made of plastic, the object side surface 241 of the fourth lens 240 is a concave surface, the image side surface 242 is a concave surface, and the object side surface 241 and the image side of the fourth lens 240 are The surface 242 is set to be aspherical.

A fifth lens 250 having a positive refractive power is made of plastic. The object side surface 251 of the fifth lens 250 is a convex surface, the image side surface 252 is a convex surface, and the object side surface 251 and the image side of the fifth lens 250 are The surface 252 is set to be aspherical.

A sixth lens 260 having a negative refractive power is made of plastic. The object side surface 261 of the sixth lens 260 is a convex surface, the image side surface 262 is a concave surface, and the object side surface 261 and the image side of the sixth lens 260 are The surface 262 is set to be aspherical.

An infrared filter (IR-filter) 270 is disposed between the image side surface 262 of the sixth lens 260 and an imaging surface 280. The material of the infrared filter filter 270 is glass and does not affect the The focal length of the six-piece imaging lens set.

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

Where z is the position value at the height h of the position along the optical axis 290 with reference to the surface apex; k is the cone constant metric; c is the reciprocal of the radius of curvature; A, B, C, D, E, G, .. .... is a high order aspheric coefficient.

In the second embodiment, the overall composite focal length of the six-piece imaging lens group is f, and the relationship is: f=3.9.

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

In the second embodiment, the six-piece imaging lens group has an angle of 2ω, and the relationship is: 2ω=74°.

In the second embodiment, the focal length of the first lens 210 is f1, and the focal length of the third lens 230 is f3, and the relationship is: |f1|/|f3|=0.977.

In the second embodiment, the focal length of the third lens 230 is f3, and the focal length of the fourth lens 240 is f4, and the relationship is: |f3|/|f4|=1.545.

In the second embodiment, the fourth lens 240 has a focal length of f4, and the fifth mirror The focal length of the slice 250 is f5, and the relationship is: |f4|/|f5|=0.668.

In the second embodiment, the composite focal length of the first lens 210, the second lens 220, and the third lens 230 is f123, and the overall composite focal length of the six-piece imaging lens group is f, and the relationship is: |f123 |/|f|=0.719.

In the second embodiment, the composite focal length of the fourth lens 240, the fifth lens 250, and the sixth lens 260 is f456, and the overall composite focal length of the six-piece imaging lens group is f, and the relationship is: |f456 |/|f|=4.353.

In the second embodiment, the focal length of the first lens 210 is f1, and the combined focal length of the second lens 220 and the third lens 230 is f23, and the relationship is: |f1|/|f23|=1.703.

In the second embodiment, the combined focal length of the second lens 220 and the third lens 230 is f23, and the combined focal length of the fourth lens 240 and the fifth lens 250 is f45, and the relationship is: |f23|/|f45| =0.079.

In the second embodiment, the combined focal length of the second lens 220 and the third lens 230 is f23, and the combined focal length of the fifth lens 250 and the sixth lens 260 is f56, and the relationship is: |f23|/|f56| =0.604.

In the second embodiment, the overall composite focal length of the six-piece imaging lens group is f, and the distance between the object-side surface 211 of the first lens 210 and the imaging surface 280 is TL, and the relationship is: |f/TL |=0.266.

The detailed structural data of the second embodiment is as shown in Table 3 of FIG. 2C, and the aspherical data is as shown in Table 4 of FIG. 2D, wherein the unit of curvature radius, thickness and focal length is in mm (mm), and Surfaces 1 and 2 as contained in Tables 3 and 4. The objects, the image side surfaces 211, 212 of the first lens 210, the surfaces 4, 5 are respectively the object of the second lens 220, the image side surfaces 221, 222, and the surfaces 8, 9 are respectively the fourth lens 230. The object, the image side surfaces 231, 232, the surfaces 10, 11 are the objects of the fifth lens 250, the image side surfaces 251, 252, respectively, and the surfaces 12, 13 are the objects of the sixth lens 260, the image side surfaces 261, 262, respectively. .

It should be noted that Table 1 in FIG. 1C, Table 2 in FIG. 1D, Table 3 in FIG. 2C, and Table 4 in FIG. 2D are the embodiments of the six-piece imaging lens group of the present invention. The numerical values of the various embodiments of the present invention are experimentally obtained, and even if different values are used, the products of the same structure are still within the protection scope of the present invention. Table 5 in Fig. 3 is a correspondence table of the respective relational expressions in the respective embodiments.

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

100, 200‧‧‧ ray

110, 210‧‧‧ first lens

111, 211‧‧‧ object side surface of the first lens

112, 212‧‧‧ image side surface of the first lens

120, 220‧‧‧ second lens

121, 221‧‧‧ object side surface of the second lens

122, 222‧‧‧ image side surface of the second lens

130, 230‧‧‧ third lens

131, 231‧‧‧ object side surface of the third lens

132, 232‧‧‧ image side surface of the third lens

140, 240‧‧‧ fourth lens

141, 241‧‧‧ object side surface of the fourth lens

142, 242‧‧‧ image side surface of the fourth lens

150, 250‧‧‧ fifth lens

151, 251‧‧‧ object side surface of the fifth lens

152, 252‧‧‧ image side surface of the fifth lens

160, 260‧‧‧ sixth lens

161, ‧ ‧ ‧ the object side surface of the sixth lens

162, 262‧‧‧ image side surface of the sixth lens

170, 270‧‧‧ Infrared filter (IR Filter)

180, 280‧‧ ‧ imaging surface

190, 290‧‧‧ optical axis

F‧‧‧ is the overall synthetic focal length

Fno‧‧‧ is the overall aperture value

2ω‧‧‧ as the corner

F1‧‧‧ is the focal length of the first lens

F3‧‧‧ is the focal length of the third lens

F4‧‧‧ is the focal length of the fourth lens

F5‧‧‧ is the focal length of the fifth lens

F123‧‧‧ is the composite focal length of the first lens, the second lens and the third lens

F456‧‧‧ is the composite focal length of the fourth, fifth and sixth lenses

F23‧‧‧ is the composite focal length of the second lens and the third lens

F45‧‧‧ is the composite focal length of the fourth lens and the fifth lens

F56‧‧‧ is the composite focal length of the fifth and sixth lenses

TL‧‧‧ is the distance from the object side surface of the first lens to the imaging surface

Fig. 1A is an optical schematic view of a first embodiment of the present invention.

Fig. 1B is a diagram showing the spherical, non-dot and distortion line of the first embodiment of the present invention.

Figure 1C is a first embodiment of the optical data of the first embodiment.

The first 1D diagram is Table 2, which is the aspherical data of the first embodiment.

Fig. 2A is an optical schematic view of a second embodiment of the present invention.

Fig. 2B is a diagram showing the spherical, non-dot and distortion line of the second embodiment of the present invention.

Figure 2C is a third embodiment of the optical data of the second embodiment.

The second chart is Table 4, which is the aspherical data of the second embodiment.

Figure 3 is a table showing the numerical data of the correlation equation of the present invention.

100‧‧‧ ray

110‧‧‧ first lens

111‧‧‧ object side surface of the first lens

112‧‧‧Image side surface of the first lens

120‧‧‧second lens

121‧‧‧ object side surface of the second lens

122‧‧‧Image side surface of the second lens

130‧‧‧ third lens

131‧‧‧ object side surface of the third lens

132‧‧‧Image side surface of the third lens

140‧‧‧Fourth lens

141‧‧‧ object side surface of the fourth lens

142‧‧‧ Image side surface of the fourth lens

150‧‧‧ fifth lens

151‧‧‧ object side surface of the fifth lens

152‧‧‧ Image side surface of the fifth lens

160‧‧‧ sixth lens

161‧‧‧ object side surface of the sixth lens

162‧‧‧ image side surface of the sixth lens

170‧‧‧Infrared filter (IR Filter)

180‧‧‧ imaging surface

190‧‧‧ optical axis

Claims (14)

A six-piece imaging lens set comprising, from the object side to the image side, a first lens having a negative refractive power, the image side surface being concave, and the object side surface and the image side surface of the first lens at least one side a non-spherical surface; a second lens having a positive refractive power, the image side surface is convex, and the object side surface and the image side surface of the second lens are at least one aspherical surface; a third lens having a positive refractive power, The object side surface is a convex surface; a fourth lens having a negative refractive power, the image side surface is a concave surface, and the object side surface and the image side surface of the fourth lens are at least one side aspherical; a positive refractive power a fifth lens having a convex side on the object side surface; a sixth lens having a negative refractive power, the image side surface being a concave surface, and the object side surface and the image side surface of the sixth lens being at least one side aspherical; the third lens One of the fifth lenses and the fifth lens is made of glass. The six-piece imaging lens set of claim 1, further comprising a light barrier disposed between the first lens and the second lens. The six-piece imaging lens set of claim 1, further comprising a light barrier disposed between the second lens and the third lens. The six-piece imaging lens set according to claim 1, wherein the first lens has a focal length of f1 and the third lens has a focal length of f3, and the two satisfy the following relationship: 0.6<|f1|/| F3|<2.0. The six-piece imaging lens set according to claim 1, wherein the third lens has a focal length of f3 and the fourth lens has a focal length of f4. Column relationship: 0.5<|f3|/|f4|<1.8. The six-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 the two satisfy the following relationship: 0.4<|f4|/| F5|<1.2. The six-piece imaging lens set according to claim 1, wherein the first lens, the second lens and the third lens have a combined focal length of f123, and the overall composite focal length of the six-piece imaging lens group is f, both satisfy the following relationship: 0.5<|f123|/|f|<1.0. The six-piece imaging lens set according to claim 1, wherein the fourth lens, the fifth lens and the sixth lens have a combined focal length of f456, and the overall composite focal length of the six-piece imaging lens group is f, both satisfy the following relationship: 2.5<|f456|/|f|<4.8. The six-piece imaging lens set according to claim 1, wherein the first lens has a focal length of f1, and the second lens and the third lens have a combined focal length of f23, and the two satisfy the following relationship: 1.4 <|f1|/|f23|<2.1. The six-piece imaging lens set according to claim 1, wherein the second lens and the third lens have a combined focal length of f23, and the fourth lens and the fifth lens have a combined focal length of f45. The following relationship is satisfied: |f23|/|f45|<0.3. The six-piece imaging lens set according to claim 1, wherein the second lens and the third lens have a combined focal length of f23, and the fifth lens and the sixth lens have a combined focal length of f56. Meet the following relationship: 0.3< |f23|/|f56|<0.8. The six-piece imaging lens set according to claim 1, wherein the overall synthetic focal length of the six-piece imaging lens group 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: |f/TL|<0.5. The six-piece imaging lens set according to claim 1, wherein the first lens is made of plastic, and the object side surface of the first lens is a convex surface, and the object side surface and the image side of the first lens The surface of the second lens is made of plastic, and the object side surface of the second lens is a convex surface, and the object side surface and the image side surface of the second lens are aspherical surfaces, and the material of the third lens is In the plastic, and the image side surface of the third lens is a convex surface, the object side surface and the image side surface of the third lens are both aspherical, the fourth lens is made of plastic, and the object side surface of the fourth lens The concave side, the object side surface and the image side surface of the fourth lens are all aspherical, the fifth lens is made of glass, and the image side surface of the fifth lens is convex, and the object side surface of the fifth lens is The image side surface is a spherical surface, the sixth lens is made of a plastic material, and the object side surface of the sixth lens is a convex surface, and the object side surface and the image side surface of the sixth lens are both aspherical. The six-piece imaging lens set according to claim 1, wherein the first lens is made of plastic, and the object side surface of the first lens is a convex surface, and the object side surface and the image side of the first lens The surface of the second lens is made of 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 third lens is made of glass, and the image side surface of the third lens is convex, the image side surface is concave, and the object side of the third lens The surface of the surface of the fourth lens is a plastic surface, and the object surface of the fourth lens is a concave surface, and the object side surface and the image side surface of the fourth lens are aspherical surfaces. The material of the lens is plastic, and the image side surface of the fifth lens is a convex surface, and the object side surface and the image side surface of the fifth lens are both aspherical, the sixth lens is made of plastic, and the sixth lens is The object side surface is a convex surface, and the object side surface and the image side surface of the sixth lens are both aspherical.