TWI480621B - 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.

In recent years, with the rise of mobile phone cameras, the demand for miniaturized photographic lenses has been increasing, and the photosensitive elements of general photographic lenses are nothing more than a Charge Coupled Device (CCD) or a Complementary Metallic Semiconductor (Complementary Metal). -Oxide Semiconductor (CMOS), due to the advancement of semiconductor process technology, the pixel area of the photosensitive element is reduced, and the miniaturized photographic lens is gradually developing into the high-pixel field. Therefore, the requirements for image quality are increasing.

The miniaturized photographic lens that is traditionally used in portable electronic products mainly uses a four-piece lens structure, but since the pixel of the mobile phone camera climbs very rapidly, the pixel area of the photosensitive element is gradually reduced, and the system is imaged. In the case of ever-increasing quality requirements, the conventional four-piece lens unit will not be able to meet higher-order photographic lens modules, and the trend of electronic products will continue to be thinner and lighter.

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, comprising: a light barrier from the object side to the image side; a first lens having a positive refractive power, the object side surface being convex And at least one side of the object side surface and the image side surface of the first lens is aspherical; a second lens having a negative refractive power, the image side surface is concave, and the object side surface and the image side surface of the second lens At least one side is aspherical; a third lens having a negative refractive power has a convex side, and at least one side of the object side surface and the image side surface of the third lens is aspherical; a fourth lens having a positive refractive power The image side surface is convex, and at least one side of the object side surface and the image side surface of the fourth lens is aspherical; a fifth lens having a negative refractive power, the image side surface is concave, and the fifth lens At least one side of the object side surface and the image side surface is aspherical; a sixth lens having a negative refractive power, the object side surface is a concave surface, and at least one side of the object side surface and the image side surface of the sixth lens is aspherical.

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 second lens is f2, and both satisfy the following relationship: 0.25 <|f1|/|f2|<0.75. When |f1|/|f2| 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 second lens is f2, and the focal length of the third lens is f3, and both satisfy the following relationship: |f2|/|f3|<0.25. When |f2|/|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. At the same time, the resolution ability is significantly improved. On the contrary, if the above optical data value range is exceeded, the performance, the resolution of the six-piece imaging lens group, and the insufficient yield are caused.

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: 0.6<|f4|/|f5|<1.3. 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 focal length of the fifth lens is f5, and the focal length of the sixth lens is f6, and both satisfy the following relationship: |f5|/|f6|<0.25. When |f5|/|f6| 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 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: 0.7<|f123|/|f|<2. 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<|f456|/|f|<5. 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 image resolution capability. Significantly improved, on the contrary, if the above optical data value range is exceeded, the performance, low resolution, and insufficient yield of the six-piece imaging lens group may be caused.

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: 0.3<|f1|/|f23| 0.8. 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 third lens and the fourth lens is f34, and the combined focal length of the fifth lens and the sixth lens is f56, and the two satisfy the following relationship: 0.7<|f34 |/|f56|<1.3. When |f34|/|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: 0.5< |f/TL|<1. 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 image side surface of the first lens is convex, and the object side surface and the image side surface of the first lens are aspherical, the second The material of the 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, and the third lens is made of plastic. The object side surface of the third lens is a convex surface, and the image side surface is a convex surface. The object side surface and the image side surface of the third lens are both aspherical surfaces, and the fourth lens is made of plastic, and the fourth lens is made of plastic. The image side surface and the image side surface of the fourth lens are both aspherical, the fifth lens is made of plastic, and the object side surface of the fifth lens is concave, and the fifth lens is The side surface and the image side surface are both aspherical, the sixth lens is made of plastic, and the object side surface of the sixth lens is concave, and the object side surface and the image side surface of the sixth lens are aspherical.

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

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

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

100, 200, 300‧‧‧ ray

110, 210, 310‧‧‧ first lens

111, 211, 311‧‧‧ object side surface of the first lens

112, 212, 312‧‧‧ image side surface of the first lens

120, 220, 320‧‧‧ second lens

121, 221, 321‧‧‧ the side surface of the second lens

122, 222, 322‧‧‧ image side surface of the second lens

130, 230, 330‧‧‧ third lens

131, 231, 331‧‧‧ the side surface of the third lens

132, 232, 332‧‧‧ image side surface of the third lens

140, 240, 340‧‧‧ fourth lens

141, 241, 341 ‧ ‧ the object side surface of the fourth lens

142, 242, 342‧‧‧ image side surface of the fourth lens

150, 250, 350‧‧‧ fifth lens

151, 251, 351 ‧ ‧ the object side surface of the fifth lens

152, 252, 352‧‧‧ image side surface of the fifth lens

160, 260, 360‧‧‧ sixth lens

161, 261, 361‧ ‧ the object side surface of the sixth lens

162, 262, 362‧‧‧ image side surface of the sixth lens

170, 270, 370‧‧‧ Infrared filter (IR Filter)

180, 280, 380‧‧ ‧ imaging surface

190, 290, 390‧‧‧ optical axis

F‧‧‧ is the overall synthetic focal length

Fno‧‧‧ is the overall aperture value

2 ω‧‧‧ as the corner

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

F2‧‧‧ is the focal length of the second 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

F6‧‧‧ is the focal length of the sixth 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

F34‧‧‧ is the composite focal length of the third lens and the fourth 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.

Fig. 3A is an optical schematic view of a third embodiment of the present invention.

Fig. 3B is a diagram showing the spherical, non-dot and distortion line of the third embodiment of the present invention.

Figure 3C is a fifth embodiment of the optical data of the third embodiment.

The 3D chart is Table 6 and is the aspherical data of the third embodiment.

Figure 4 is a table VII, which is a numerical data of the correlation of the present invention.

For a six-piece imaging lens set provided by the first embodiment of the present invention, please refer to FIGS. 1A and 1B. FIG. 1A is a schematic view showing the configuration of a six-piece imaging lens unit according to the first embodiment of the present invention, and FIG. In the aberration diagram of the first embodiment of the present invention, the first embodiment sequentially includes from the object side A to the image side B:

A light bar 100.

A first lens 110 having a 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 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 negative 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 concave 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 third lens 130 having a negative 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 concave 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 positive 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 convex 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 negative refractive power is made of plastic, the object side surface 151 of the fifth lens 150 is a convex surface, the image side surface 152 is a concave surface, and the object side surface 151 and the image side of the fifth lens 150 are The surface 152 is set to be aspherical.

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 concave surface, and the image side surface 162 is a convex surface. Both the side surface 161 and the image side surface 162 are set to be aspherical.

An infrared filter (IR-filter) 170 is disposed between the image side surface 162 of the sixth lens 160 and an imaging surface 180. The infrared filter filter 170 is made of glass and does not affect the image. 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 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, ... It 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=3.61.

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

In the first embodiment, the six-piece imaging lens group has an angle of 2 ω and a relationship of 2 ω = 77°.

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|=0.519.

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|=0.0667.

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|=0.9170.

In the first embodiment, the focal length of the fifth lens 150 is f5, and the sixth lens 160 The focal length is f6, and the relationship is: |f5|/|f6|=0.0548.

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|=1.3333.

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|=3.4561.

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|=0.562.

In the first embodiment, the combined focal length of the third lens 130 and the fourth lens 140 is f34, and the combined focal length of the fifth lens 150 and the sixth lens 160 is f56, and the relationship is: |f34|/|f56| =0.999.

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 |=0.7644.

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 2 and 3 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 4 and 5 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 objects of the fourth lens 140, the image side surfaces 141, 142, respectively, and the surfaces 10, 11 are respectively The object of the five lenses 150, the image side surfaces 151, 152, and the surfaces 12, 13 are the sixth lens 160, respectively. Objects, image side surfaces 161, 162.

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 A to the image side B:

A light bar 200.

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

A second lens 220 having a negative 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 concave 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 negative refractive power is made of plastic. The object side surface 231 of the third lens 230 is a convex surface, the image side surface 232 is a concave surface, and the object side surface 231 and the image side of the third lens 230 are The surface 232 is set to be aspherical.

A fourth lens 240 having a positive 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 convex 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 negative 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 concave 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, which is made of plastic, the sixth lens The object side surface 261 of the 260 is a concave surface, and the image side surface 262 is a convex surface. The object side surface 261 and the image side surface 262 of the sixth lens 260 are both 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, ... It 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=3.61.

In the second embodiment, the overall aperture value (f-number) of the six-piece imaging lens group is Fno, and the relationship is Fno=2.2.

In the second embodiment, the six-piece imaging lens group has an angle of 2 ω, and the relationship is: 2 ω = 78°.

In the second embodiment, the focal length of the first lens 210 is f1, and the focal length of the second lens 220 is f2, and the relationship is: |f1|/|f2|=0.531.

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|=0.0421.

In the second embodiment, the focal length of the fourth lens 240 is f4, and the focal length of the fifth lens 250 is f5, and the relationship is: |f4|/|f5|=0.9205.

In the second embodiment, the focal length of the fifth lens 250 is f5, and the focal length of the sixth lens 260 is f6, and the relationship is: |f5|/|f6|=0.0531.

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|=1.3399.

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|=3.4447.

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|=0.561.

In the second embodiment, the combined focal length of the third lens 230 and the fourth lens 240 is f34, and the combined focal length of the fifth lens 250 and the sixth lens 260 is f56, and the relationship is: |f34|/|f56| =0.993.

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 |=0.7677.

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 The surfaces 2 and 3 shown in Tables 3 and 4 are respectively the object of the first lens 210 and the image side surfaces 211 and 212, and the surfaces 4 and 5 are the objects of the second lens 220 and the image side surfaces 221 and 222, respectively. The surfaces 6, 7 are respectively the object of the third lens 230, the image side surfaces 231, 232, and the surfaces 8, 9 are the objects of the fourth lens 240, the image side surfaces 241, 242, respectively, and the surfaces 10, 11 are The object, the image side surfaces 251, 252, and the surfaces 12, 13 of the fifth lens 250 are the object, image side surfaces 261, 262 of the sixth lens 260, respectively.

A three-piece imaging lens set according to a third embodiment of the present invention, please refer to FIGS. 3A and 3B. FIG. 3A is a schematic view showing a configuration of a six-piece imaging lens unit according to a third embodiment of the present invention, and FIG. According to a third embodiment of the present invention, the third embodiment sequentially includes from the object side A to the image side B:

A light bar 300.

A first lens 310 having a positive refractive power is made of plastic. The object side surface 311 of the first lens 310 is a convex surface, and the image side surface 312 is a convex surface. The object side surface 311 and the image side of the first lens 310 are The surface 312 is set to be aspherical.

A second lens 320 having a negative refractive power is made of plastic. The object side surface 321 of the second lens 320 is a convex surface, the image side surface 322 is a concave surface, and the object side surface 321 and the image side of the second lens 320 are The surface 322 is set to be aspherical.

A third lens 330 having a negative refractive power is made of plastic. The object side surface 331 of the third lens 330 is a convex surface, the image side surface 332 is a concave surface, and the object side surface 231 and the image side of the third lens 330 are The surface 332 is set to be aspherical.

A fourth lens 340 having a positive refractive power is made of plastic. The object side surface 341 of the fourth lens 340 is a concave surface, the image side surface 342 is a convex surface, and the object side surface 341 and the image side of the fourth lens 340 are The surface 342 is set to be aspherical.

A fifth lens 350 having a negative refractive power is made of plastic, the object side surface 351 of the fifth lens 350 is a convex surface, the image side surface 352 is a concave surface, and the object side surface 351 and the image side of the fifth lens 350 are The surface 352 is set to be aspherical.

A sixth lens 360 having a negative refractive power is made of plastic, the object side surface 361 of the sixth lens 360 is a concave surface, the image side surface 362 is a concave surface, and the object side surface 361 and the image side of the sixth lens 360 are The surface 362 is set to be aspherical.

An infrared filter (IR-filter) 370 is disposed between the image side surface 362 of the sixth lens 360 and an imaging surface 380. The infrared filter filter 370 is made of glass and does not affect the image. 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 390 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, ... It is a high-order aspheric coefficient.

In the third embodiment, the overall composite focal length of the six-piece imaging lens group is f, and the relationship is: f=3.61.

In the third embodiment, the overall aperture value (f-number) of the six-piece imaging lens group is Fno, and the relationship is Fno=2.2.

In the third embodiment, the six-piece imaging lens group has an angle of 2 ω, and the relationship is: 2 ω = 78°.

In the third embodiment, the focal length of the first lens 310 is f1, and the focal length of the second lens 320 is f2, and the relationship is: |f1|/|f2|=0.509.

In the third embodiment, the focal length of the second lens 320 is f2, and the focal length of the third lens 330 is f3, and the relationship is: |f2|/|f3|=0.0702.

In the third embodiment, the fourth lens 340 has a focal length of f4, and the fifth lens 350 The focal length is f5, and the relationship is: |f4|/|f5|=0.8966.

In the third embodiment, the focal length of the fifth lens 350 is f5, and the focal length of the sixth lens 360 is f6, and the relationship is: |f5|/|f6|=0.0874.

In the third embodiment, the composite focal length of the first lens 310, the second lens 320, and the third lens 330 is f123, and the overall composite focal length of the six-piece imaging lens group is f, and the relationship is: |f123 |/|f|=1.318.

In the third embodiment, the composite focal length of the fourth lens 340, the fifth lens 350, and the sixth lens 360 is f456, and the overall composite focal length of the six-piece imaging lens group is f, and the relationship is: |f456 |/|f|=3.6606.

In the third embodiment, the focal length of the first lens 310 is f1, and the combined focal length of the second lens 320 and the third lens 330 is f23, and the relationship is: |f1|/|f23|=0.554.

In the third embodiment, the combined focal length of the third lens 330 and the fourth lens 340 is f34, and the combined focal length of the fifth lens 350 and the sixth lens 360 is f56, and the relationship is: |f34|/|f56| =1.012.

In the third embodiment, the overall composite focal length of the six-piece imaging lens group is f, and the distance between the object side surface 311 of the first lens 310 and the imaging surface 380 is TL, and the relationship is: |f/TL |=0.7578.

The detailed structural data of the third embodiment is as shown in Table 5 of FIG. 3C, and the aspherical data is as shown in Table 6 of FIG. 3D, wherein the unit of curvature radius, thickness and focal length is in mm (mm), and The surfaces 2 and 3 shown in Tables 5 and 6 are respectively the object of the first lens 310, the image side surfaces 311, 312, and the surfaces 4, 5 are the objects of the second lens 320, the image side surfaces 321, 322, respectively. The surfaces 6, 7 are respectively the object of the third lens 330, the image side surfaces 331, 332, the surface 8, 9 is the object of the fourth lens 340, the image side surfaces 341, 342, respectively, the surfaces 10, 11 are the object of the fifth lens 350, the image side surfaces 351, 352, respectively, the surfaces 12, 13 are the sixth lens 360 Objects, image side surfaces 361, 362.

It should be noted that Table 1 in Figure 1C, Table 2 in Figure 1D, Table 3 in Figure 2C, Table 4 in Figure 2D, Table 5 in Table 3C, and Table 3D in Figure 3C Table 6 is a different numerical value change table of each embodiment of the six-piece imaging lens group of the present invention, but the numerical changes of the embodiments of the present invention are experimentally obtained, and even if different values are used, the products of the same structure still belong to the present invention. Protection category. Table 7 in Fig. 4 is a correspondence table of the respective relational expressions in the respective embodiments.

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

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‧‧‧ 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 (12)

A six-piece imaging lens set comprising: a light barrier from the object side to the image side; a first lens having a positive refractive power, the object side surface is a convex surface, and the object side surface and the image of the first lens At least one side of the side surface is aspherical; a second lens having a negative refractive power, the image side surface is concave, and the object side surface and the image side surface of the second lens are at least one side aspherical; a negative refractive power a third lens, the object side surface is a convex surface, the object side surface and the image side surface of the third lens are at least one aspherical surface; a fourth lens having a positive refractive power, the image side surface is a convex surface, and the fourth At least one side of the object side surface and the image side surface of the lens is aspherical; a fifth lens having a negative refractive power, the image side surface is concave, and the object side surface and the image side surface of the fifth lens are at least one side aspherical a sixth lens having a negative refractive power, wherein the object side surface is a concave surface, and at least one side of the object side surface and the image side surface of the sixth lens is aspherical; wherein the focal length of the first lens is f1, the second The combined focal length of the lens and the third lens is f23, Shall satisfy the following relation: 0.3 <| f1 | / | f23 | <0.8. The six-piece imaging lens set according to claim 1, wherein the first lens has a focal length of f1 and the second lens has a focal length of f2, and the two satisfy the following relationship: 0.25<|f1|/| F2|<0.75. The six-piece imaging lens set according to claim 1, wherein the second lens has a focal length of f2 and the third lens has a focal length of f3, and the two satisfy the following relationship: |f2|/|f3| <0.25. 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: 0.6<|f4|/| F5|<1.3. The six-piece imaging lens set according to claim 1, wherein the fifth lens has a focal length of f5 and the sixth lens has a focal length of f6, and the two satisfy the following relationship: |f5|/|f6| <0.25. 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: 0.7<|f123|/|f1<2. 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<|f456|/|f|<5. The six-piece imaging lens set according to claim 1, wherein the third lens and the fourth lens have a combined focal length of f34, and the fifth lens and the sixth lens have a combined focal length of f56. The following relationship is satisfied: 0.7<|f34|/|f56|<1.3. 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: 0.5<|f/TL|<1. The six-piece imaging lens set according to claim 1, wherein the first lens is made of plastic, and the image 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 concave, and the object side surface and the image side surface of the second lens are aspherical, and the material of the third lens is The plastic material, and the object side surface of the third lens is a convex surface, and the image side surface is a convex surface, and the object side surface and the image side surface of the third lens are aspherical surfaces, and the material of the fourth lens The image is a plastic surface, and the image side surface of the fourth lens is a convex surface, and the object side surface and the image side surface of the fourth lens are aspherical surfaces, the fifth lens is made of plastic, and the object side of the fifth lens The surface of the fifth lens is aspherical, the object surface of the fifth lens is aspherical, the material of the sixth lens is plastic, and the object side surface of the sixth lens is concave, and the object side surface of the sixth lens Both the image side surface and the image side surface are aspherical. The six-piece imaging lens set according to claim 1, wherein the first lens is made of plastic, and the image 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 The plastic material, and the object side surface of the third lens is a convex surface, and the image side surface is a concave surface. The object side surface and the image side surface of the third lens are both aspherical surfaces, and the fourth lens is made of plastic, and the first lens is made of plastic. The image side surface of the fourth lens is a convex surface, 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 object side surface of the fifth lens is concave, the fifth The object side surface and the image side surface of the lens are aspherical, the sixth lens is made of plastic, and the object side surface of the sixth lens is concave, and the object side surface and the image side surface of the sixth lens are both non-spherical. Spherical. The six-piece imaging lens set according to claim 1, wherein the first lens is made of plastic, and the image 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 The plastic material, and the object side surface of the third lens is a convex surface, and the image side surface is a convex surface, and the object side surface and the image side surface of the third lens are aspherical surfaces, and the material of the fourth lens The image is a plastic surface, and the image side surface of the fourth lens is a convex surface, and the object side surface and the image side surface of the fourth lens are aspherical surfaces, the fifth lens is made of plastic, and the object side of the fifth lens The surface of the fifth lens is aspherical, the object surface of the fifth lens is aspherical, the material of the sixth lens is plastic, and the object side surface of the sixth lens is concave, and the object side surface of the sixth lens Both the image side surface and the image side surface are aspherical.