TW201409110A - Optical lens system - Google Patents

Abstract

An optical lens system comprises, in order from the object side to the image side: a first lens element with a positive refractive power having a convex object-side surface, one of the object-side surface and an image-side surface being aspheric; a second lens element with a negative refractive power having a concave image-side surface, one of an object-side surface and the image-side surface being aspheric; a third lens element with a positive refractive power, one of an object-side surface and an image-side surface being aspheric; a fourth lens element with a positive refractive power having a concave object-side surface and a convex image-side surface, one of the object-side and image-side surfaces being aspheric; a fifth lens element with a negative refractive power having a concave image-side surface, one of an object-side surface and the image-side surface being aspheric. Thereby, the total track length of system will not be too long.

Description

Five-piece imaging lens set

The present invention relates to optical lenses, and more particularly to a five-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.

It is an object of the present invention to provide a five-piece imaging lens set that can A five-piece imaging lens set for high-resolution mobile phone cameras that does not make the total length of the lens too long, but also has a large picture angle, large aperture, high number of pictures, high resolution and low lens height.

The present invention provides a five-piece imaging lens set comprising, from the object side to the image side, a first lens having a positive refractive power, the object side surface being a convex surface, and the object side surface and the image side of the first lens At least one side of the surface is aspherical; a second lens having a negative refractive power, the image side surface is concave, and at least one side of the object side surface and the image side surface of the second lens is aspherical; a positive refractive power a three-lens having at least one side of the object side surface and the image side surface being aspherical; a fourth lens having a positive refractive power, the object side surface being a concave surface, the image side surface being a convex surface, and the object side surface of the fourth lens At least one side of the image side surface 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; and a light bar, The ray may be disposed between the first lens and the second lens, or between the first lens and the second lens; and the refractive index of the first lens N1, the inverse dispersion ratio of the first lens is V1, the first The lens is a refractive index of N2, reverse dispersion rate of the second lens V2, respectively, satisfy the following relations: N1 <1.57; V1> 40; N2> 1.57; V2 <40. When N1, V1, N2, and V2 respectively satisfy the foregoing relationship, the correction of the color difference of the five-piece imaging lens group is facilitated, and the materials of the first lens and the second lens are more suitable, which can help provide a large view. At the field angle, there is not too much system aberration.

The five-piece imaging lens set of the present invention, 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|<0.9. When |f1|/|f2| satisfies the foregoing relationship, the five-image imaging lens set can have a large picture angle, a large aperture, a high number of pictures, and a low lens height, and the resolution capability is significantly improved. The above-mentioned range of optical data values results in problems such as low performance, low resolution, and insufficient yield of the five-piece imaging lens group.

In the five-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 five-image 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 significantly improved. The above-mentioned range of optical data values results in problems such as low performance, low resolution, and insufficient yield of the five-piece imaging lens group.

In the five-piece imaging lens set of the present invention, the focal length of the second lens is f2, and the combined focal length of the third lens and the fourth lens is f34, and the two satisfy the following relationship: 0.7<|f2|/|f34| 2.7. When |f2|/|f34| satisfies the foregoing relationship, the five-image 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 significantly improved. The above-mentioned range of optical data values results in problems such as low performance, low resolution, and insufficient yield of the five-piece imaging lens group.

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, and both satisfy the following relationship: 0.7<|f4|/|f5|<1.7. When |f4|/|f5| satisfies the foregoing relationship, the five-piece imaging mirror can be made The film set has a large picture angle, a large aperture, a high number of pictures and a low lens height, and the resolution capability is significantly improved. Conversely, if the optical data value range is exceeded, the performance and resolution of the five-piece imaging lens group will be caused. Low, and insufficient yield.

In the five-piece imaging lens set of the present invention, the composite focal length of the first lens and the second lens is f12, and the overall composite focal length of the five-piece imaging lens set is f, and the two satisfy the following relationship: 0.75<|f12| /f<1.25. When |f12|/f satisfies the foregoing relationship, the five-piece 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 five-piece imaging lens set.

In the five-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 five-piece imaging lens group is f, and the two satisfy the following relationship: 0.6<|f123|/f<0.25. When |f123|/f satisfies the foregoing relationship, the five-piece 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 five-piece imaging lens set.

In the five-piece imaging lens set of the present invention, the imaging surface image radius is IH, and the distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, and the two satisfy the following relationship: 0.55<|IH/TL| <0.95. When |IH/TL| satisfies the above relationship, it has a large picture angle, a high number of pictures, and a low lens height, and the resolution capability is remarkably improved.

In the five-piece imaging lens set of the present invention, 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, and the two satisfy the following relationship: 0.75< |f/TL|<1.5. When |f/TL| satisfies the foregoing relationship, it can have a shorter optical total length and is smaller and lighter.

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

"First Embodiment"

For a five-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 five-piece imaging lens unit according to a first embodiment of the present invention, and FIG. In the aberration diagram of the first embodiment of the present invention, the first embodiment 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. Both the object side surface 131 and the image side surface 132 of the three lenses 130 are 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, and the image side surface 152 is a concave surface. The object side surface 151 and the image side surface of the fifth lens 150 are formed. 152 are all set to aspherical.

An infrared filter (IR-filter) 160 is disposed between the image side surface 152 of the fifth lens 150 and an imaging surface 170. The infrared filter filter 160 is made of glass and does not affect the image. The focal length of a five-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 180 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 five-piece imaging lens group is f, and the relationship is: f=3.65.

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

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

In the first embodiment, the focal length of the first lens 110 is f1, and the second mirror The focal length of the slice 120 is f2, and the relationship is: |f1|/|f2|=0.5230.

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|=0.5679.

In the first embodiment, the focal length of the second lens 120 is f2, and the combined focal length of the third lens 130 and the fourth lens 140 is f34, and the relationship is: |f2|/|f34|=2.2848.

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|=0.9692.

In the first embodiment, the composite focal length of the first lens 110 and the second lens 120 is f12, and the overall composite focal length of the five-piece imaging lens group is f, and the relationship is: |f12|/|f|= 1.0343.

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 five-piece imaging lens group is f, and the relationship is: |f123 |/|f|=1.0609.

In the first embodiment, the imaging surface 170 has an image radius of IH, and the distance between the object side surface 111 of the first lens 110 and the imaging surface 170 is TL, and the relationship is: |IH/TL|=0.8341.

In the first embodiment, the overall composite focal length of the five-piece imaging lens group is f, and 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 |=1.2573.

In the first embodiment, the refractive index of the first lens 110 is N1, the first The reverse dispersion ratio of the lens 110 is V1 (also referred to as Abbe number), the refractive index of the second lens 120 is N2, and the inverse dispersion ratio of the second lens 120 (also referred to as Abbe number) is V2, the relationship is: N1 = 1.544; V1 = 56.0; N2 = 1.634; V2 = 23.9.

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.

Second Embodiment

A five-piece imaging lens set according to a second embodiment of the present invention, please refer to FIGS. 2A and 2B. FIG. 2A is a schematic view showing a configuration of a five-piece imaging lens group according to a second embodiment of the present invention, and FIG. According to a second embodiment of the present invention, the second embodiment includes a first lens 210 having a positive refractive power, the material of which is plastic, and the object side surface of the first lens 210. 211 is a convex surface, and the image side surface 212 is a concave surface, and both the object side surface 211 and the image side surface 212 of the first lens 210 are aspherical.

A light bar 200.

a second lens 220 with a negative refractive power, which is made of plastic, the second mirror The object side surface 221 of the sheet 220 is a convex surface, and the image side surface 222 is a concave surface. The object side surface 221 and the image side surface 222 of the second lens 220 are both 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 surface of the fifth lens 250 are formed. 252 are all set to aspherical.

An infrared filter (IR-filter) 260 is disposed between the image side surface 252 of the fifth lens 250 and an image forming surface 270. The material of the infrared filter filter 260 is glass and does not affect the image. The focal length of a five-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 280 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 five-piece imaging lens group is f, and the relationship is: f=3.76.

In the second embodiment, the overall aperture value of the five-piece imaging lens group (f-number) is Fno, and its relational expression is: Fno=2.2.

In the second embodiment, the five-piece imaging lens group has an angle of 2ω, and the relationship is: 2ω=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|=0.4876.

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|=0.5149.

In the second embodiment, the focal length of the second lens 220 is f2, and the combined focal length of the third lens 230 and the fourth lens 240 is f34, and the relationship is: |f2|/|f34|=2.3878.

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|=0.9240.

In the second embodiment, the composite focal length of the first lens 210 and the second lens 220 is f12, and the overall composite focal length of the five-piece imaging lens group is f, and the relationship is: |f12|/|f|= 0.9676.

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 five-piece imaging lens group is f, and the relationship is: |f123 |/|f|=0.9808.

In the second embodiment, the image plane 270 has an image radius of IH, and the distance between the object side surface 211 of the first lens 210 and the image plane 270 is TL, and the relationship is: |IH/TL|=0.8108.

In the second embodiment, the overall composite focal length of the five-piece imaging lens group is f, and 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 |=1.2373.

In the second embodiment, the refractive index of the first lens 210 is N1, the inverse dispersion ratio of the first lens 210 is V1 (also referred to as Abbe number), and the refractive index of the second lens 220 is N2. The inverse dispersion ratio (also referred to as Abbe number) of the second lens 220 is V2, and the relationship is: N1=1.544; V1=56; N2=1.632; V2=23.

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 1 and 2 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 and 7 are respectively the object of the third lens 230 and the image side surfaces 231 and 232. The surfaces 8 and 9 are the objects of the fourth lens 240 and the image side surfaces 241 and 242, respectively. The surfaces 10 and 11 are respectively The object of the five lenses 250, the image side surfaces 251, 252.

Third Embodiment

A five-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 five-piece imaging lens set according to a third embodiment of the present invention, and FIG. According to a third embodiment of the present invention, the third embodiment includes: a first lens 310 having a positive refractive power, the material is plastic, and the first mirror is from the object side A to the image side B. The object side surface 311 of the sheet 310 is a convex surface, and the image side surface 312 is a convex surface. The object side surface 311 and the image side surface 312 of the first lens 310 are both aspherical.

A light bar 300.

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 concave 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 positive refractive power is made of plastic. The object side surface 331 of the third lens 330 is a concave surface, the image side surface 332 is a convex surface, and the object side surface 331 and the image side of the third lens 330 are formed. 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, and the image side surface 352 is a concave surface. The object side surface 351 and the image side surface of the fifth lens 350 are formed. 352 are all set to aspherical.

An infrared filter (IR-filter) 360 is disposed between the image side surface 352 of the fifth lens 350 and an image forming surface 370. The material of the infrared filter filter 360 is glass and does not affect the image. The focal length of a five-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 380 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, ... are high-order aspheric coefficients.

In the third embodiment, the overall composite focal length of the five-piece imaging lens group is f, and the relationship is: f=3.67.

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

In the third embodiment, the five-piece imaging lens group has an angle of 2ω, and the relationship is: 2ω=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|=0.5951.

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|=0.5628.

In the third embodiment, the focal length of the second lens 320 is f2, and the combined focal length of the third lens 330 and the fourth lens 340 is f34, and the relationship is: |f2|/|f34|=1.4379.

In the third embodiment, the focal length of the fourth lens 340 is f4, and the focal length of the fifth lens 350 is f5, and the relationship is: |f4|/|f5|=0.9599.

In the third embodiment, the composite focal length of the first lens 310 and the second lens 320 is f12, and the overall composite focal length of the five-piece imaging lens group is f, and the relationship is: |f12|/|f|= 0.9758.

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 whole of the five-piece imaging lens group The composite focal length is f, and the relationship is: |f123|/|f|=0.9480.

In the third embodiment, the image plane 370 has an image radius of IH, and the distance between the object side surface 311 of the first lens 310 and the image plane 370 is TL, and the relationship is: |IH/TL|=0.8307.

In the third embodiment, the overall composite focal length of the five-piece imaging lens group is f, and 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 |=1.2611.

In the third embodiment, the refractive index of the first lens 310 is N1, the inverse dispersion ratio of the first lens 310 is V1 (also referred to as Abbe number), and the refractive index of the second lens 320 is N2. The inverse dispersion ratio (also referred to as Abbe number) of the second lens 320 is V2, and the relationship is: N1=1.535; V1=56; N2=1.632; V2=23.

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 1 and 2 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, and the surfaces 8, 9 are the objects of the fourth lens 340, the image side surfaces 341, 342, respectively, and the surfaces 10, 11 are respectively The object of the five lenses 350, the image side surfaces 351, 352.

Fourth Embodiment

A five-piece imaging lens set according to a fourth embodiment of the present invention, please refer to 4A and 4B, FIG. 4A is a schematic view showing a configuration of a five-piece imaging lens unit according to a fourth embodiment of the present invention, and FIG. 4B is a diagram showing aberrations according to a fourth embodiment of the present invention, and the fourth embodiment is from the object side. A to the image side B includes: a first lens 410 having a positive refractive power, the material of which is plastic, the object side surface 411 of the first lens 410 is a convex surface, and the image side surface 412 is a convex surface, the first lens 410 Both the object side surface 411 and the image side surface 412 are aspherical.

A light bar 400.

A second lens 420 having a negative refractive power is made of plastic. The object side surface 421 of the second lens 420 is a concave surface, the image side surface 422 is a concave surface, and the object side surface 421 and the image side of the second lens 420 are The surface 422 is set to be aspherical.

A third lens 430 having a positive refractive power is made of plastic. The object side surface 431 of the third lens 430 is a concave surface, the image side surface 432 is a convex surface, and the object side surface 431 and the image side of the third lens 430 are The surface 432 is set to be aspherical.

A fourth lens 440 having a positive refractive power is made of plastic. The object side surface 441 of the fourth lens 440 is a concave surface, the image side surface 442 is a convex surface, and the object side surface 441 and the image side of the fourth lens 440 are The surface 442 is set to be aspherical.

A fifth lens 450 having a negative refractive power is made of plastic. The object side surface 451 of the fifth lens 450 is a convex surface, and the image side surface 452 is a concave surface. The object side surface 451 and the image side surface of the fifth lens 450 are formed. 452 are all set to aspherical.

An infrared filter (IR-filter) 460 is disposed between the image side surface 452 of the fifth lens 450 and an imaging surface 470. The infrared filter filter 460 is made of glass and does not affect the image. The focal length of a five-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 480 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 fourth embodiment, the overall composite focal length of the five-piece imaging lens group is f, and the relationship is: f=4.13.

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

In the fourth embodiment, the five-piece imaging lens group has an angle of 2ω, and the relationship is: 2ω=72°.

In the fourth embodiment, the focal length of the first lens 410 is f1, and the focal length of the second lens 420 is f2, and the relationship is: |f1|/|f2|=0.6969.

In the fourth embodiment, the focal length of the first lens 410 is f1, and the combined focal length of the second lens 420 and the third lens 430 is f23, and the relationship is: |f1|/|f23|=0.5256.

In the fourth embodiment, the focal length of the second lens 420 is f2, and the combined focal length of the third lens 430 and the fourth lens 440 is f34, and the relationship is: |f2|/|f34|=1.0029.

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|=1.0272.

In the fourth embodiment, the first lens 410 and the second lens 420 are combined The focal length is f12, and the overall composite focal length of the five-piece imaging lens group is f, and the relationship is: |f12|/|f|=0.9423.

In the fourth embodiment, the composite focal length of the first lens 410, the second lens 420, and the third lens 430 is f123, and the overall composite focal length of the five-piece imaging lens group is f, and the relationship is: |f123 |/|f|=0.9006.

In the fourth embodiment, the imaging surface 470 has an image radius of IH, and the distance between the object side surface 411 of the first lens 410 and the imaging surface 470 is TL, and the relationship is: |IH/TL|=0.7374.

In the fourth embodiment, the overall composite focal length of the five-piece imaging lens group is f, and 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 |=1.1918.

In the fourth embodiment, the refractive index of the first lens 410 is N1, the inverse dispersion ratio of the first lens 410 is V1 (also referred to as Abbe number), and the refractive index of the second lens 420 is N2. The inverse dispersion ratio (also referred to as Abbe number) of the second lens 420 is V2, and the relationship is: N1=1.535; V1=56; N2=1.632; V2=23.

The detailed structural data of the fourth embodiment is as shown in Table 7 of FIG. 4C, and the aspherical data is as shown in Table 8 of FIG. 4D, wherein the unit of curvature radius, thickness and focal length is in mm (mm), and The surfaces 1 and 2 shown in Tables 7 and 8 are respectively the object of the first lens 410, the image side surfaces 411 and 412, and the surfaces 4 and 5 are the objects of the second lens 420 and the image side surfaces 421 and 422, respectively. The surfaces 6, 7 are the objects of the third lens 430, the image side surfaces 431, 432, and the surfaces 8, 9 respectively. The objects, the image side surfaces 441 and 442 of the fourth lens 440, and the surfaces 10 and 11 are the objects of the fifth lens 450 and the image side surfaces 451 and 452, respectively.

Fifth Embodiment

A five-piece imaging lens set according to a fifth embodiment of the present invention is shown in FIGS. 5A and 5B. FIG. 5A is a schematic view showing a configuration of a five-piece imaging lens unit according to a fifth embodiment of the present invention. FIG. According to a fifth embodiment of the present invention, the fifth embodiment includes a first lens 510 having a positive refractive power, the material of which is plastic, and the object side surface of the first lens 510. 511 is a convex surface, and the image side surface 512 is a convex surface, and both the object side surface 511 and the image side surface 512 of the first lens 510 are aspherical.

A light bar 500.

A second lens 520 having a negative refractive power is made of plastic, the object side surface 521 of the second lens 520 is a concave surface, the image side surface 522 is a concave surface, and the object side surface 521 and the image side of the second lens 520 are The surface 522 is set to be aspherical.

A third lens 530 having a positive refractive power is made of plastic. The object side surface 531 of the third lens 530 is a convex surface, the image side surface 532 is a convex surface, and the object side surface 531 and the image side of the third lens 530. The surface 532 is set to be aspherical.

A fourth lens 540 having a positive refractive power is made of plastic, the object side surface 541 of the fourth lens 540 is a concave surface, the image side surface 542 is a convex surface, and the object side surface 541 and the image side of the fourth lens 540 are The surface 542 is set to be aspherical.

a fifth lens 550 having a negative refractive power, the material of which is plastic, the object side surface 551 of the fifth lens 550 is a convex surface, and the image side surface 552 is a concave surface, the fifth Both the object side surface 551 and the image side surface 552 of the lens 550 are aspherical.

An infrared filter (IR-filter) 560 is disposed between the image side surface 552 of the fifth lens 550 and an image forming surface 570. The material of the infrared filter filter 560 is glass and does not affect the The focal length of a five-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 580 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 fifth embodiment, the overall composite focal length of the five-piece imaging lens group is f, and the relationship is: f=4.10.

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

In the fifth embodiment, the five-piece imaging lens group has an angle of 2ω, and the relationship is: 2ω=71.5°.

In the fifth embodiment, the focal length of the first lens 510 is f1, and the focal length of the second lens 520 is f2, and the relationship is: |f1|/|f2|=0.52295.

In the fifth embodiment, the focal length of the first lens 510 is f1, and the combined focal length of the second lens 520 and the third lens 530 is f23, and the relationship is: |f1|/|f23|=0.58686.

In the fifth embodiment, the focal length of the second lens 520 is f2, and the combined focal length of the third lens 530 and the fourth lens 540 is f34, and the relationship is: |f2|/|f34|=1.27233.

In the fifth embodiment, the focal length of the fourth lens 540 is f4, and the focal length of the fifth lens 550 is f5, and the relationship is: |f4|/|f5|=1.54187.

In the fifth embodiment, the composite focal length of the first lens 510 and the second lens 520 is f12, and the overall composite focal length of the five-piece imaging lens group is f, and the relationship is: |f12|/|f|= 1.026441.

In the fifth embodiment, the composite focal length of the first lens 510, the second lens 520, and the third lens 530 is f123, and the overall composite focal length of the five-piece imaging lens group is f, and the relationship is: |f123 |/|f|=0.824081.

In the fifth embodiment, the imaging surface 570 has an image radius of IH, and the distance between the object side surface 511 of the first lens 510 and the imaging surface 570 is TL, and the relationship is: |IH/TL|=0.732.

In the fifth embodiment, the overall composite focal length of the five-piece imaging lens group is f, and the distance between the object side surface 511 of the first lens 510 and the imaging surface 570 is TL, and the relationship is: |f/TL |=1.125267.

In the fifth embodiment, the refractive index of the first lens 510 is N1, the inverse dispersion ratio of the first lens 510 is V1 (also referred to as Abbe number), and the refractive index of the second lens 520 is N2. The inverse dispersion ratio (also referred to as Abbe number) of the second lens 520 is V2, and the relationship is: N1=1.544; V1=56; N2=1.632; V2=23.

The detailed structural data of the fifth embodiment is as shown in Table IX of FIG. 5C, and the aspherical data is as shown in Table 10 of FIG. 5D, in which the radius of curvature and thickness are And the unit of the focal length is mm (mm), and the surfaces 1 and 2 contained in Tables 9 and 10 are respectively the object of the first lens 510, the image side surfaces 511, 512, and the surfaces 4, 5 are the second The object, the image side surfaces 521, 522, and the surfaces 6, 7 of the lens 520 are the object of the third lens 530, the image side surfaces 531, 532, respectively, and the surfaces 8, 9 are the objects and image side surfaces of the fourth lens 540, respectively. 541 and 542, the surfaces 10 and 11 are the object and image side surfaces 551 and 552 of the fifth lens 550, respectively.

Sixth Embodiment

A five-piece imaging lens set according to a sixth embodiment of the present invention, please refer to FIGS. 6A and 6B. FIG. 6A is a schematic view showing a configuration of a five-piece imaging lens unit according to a sixth embodiment of the present invention, and FIG. According to a sixth embodiment of the present invention, the sixth embodiment includes a light barrier 600 from the object side A to the image side B.

A first lens 610 having a positive refractive power is made of plastic. The object side surface 611 of the first lens 610 is a convex surface, and the image side surface 612 is a convex surface. The object side surface 611 and the image side of the first lens 610 are The surface 612 is set to be aspherical.

A second lens 620 having a negative refractive power is made of plastic, the object side surface 621 of the second lens 620 is a concave surface, the image side surface 622 is a concave surface, and the object side surface 621 and the image side of the second lens 620 are The surface 622 is set to be aspherical.

A third lens 630 having a negative refractive power is made of plastic. The object side surface 631 of the third lens 630 is a concave surface, the image side surface 632 is a convex surface, and the object side surface 631 and the image side of the third lens 630 are The surface 632 is set to be aspherical.

a fourth lens 640 with positive refractive power, which is made of plastic, the fourth mirror The object side surface 641 of the sheet 640 is a concave surface, and the image side surface 642 is a convex surface. The object side surface 641 and the image side surface 642 of the fourth lens 640 are both aspherical.

A fifth lens 650 having a negative refractive power is made of plastic. The object side surface 651 of the fifth lens 650 is a concave surface, the image side surface 652 is a concave surface, and the object side surface 651 and the image side surface of the fifth lens 650. 652 are all set to aspherical.

An infrared filter (IR-filter) 660 is disposed between the image side surface 652 of the fifth lens 650 and an image forming surface 670. The material of the infrared filter filter 660 is glass and does not affect the The focal length of a five-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 680 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 sixth embodiment, the overall composite focal length of the five-piece imaging lens group is f, and the relationship is: f=3.29.

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

In the sixth embodiment, the five-piece imaging lens group has an angle of 2ω, and the relationship is: 2ω=72°.

In the sixth embodiment, the focal length of the first lens 610 is f1, and the focal length of the second lens 120 is f2, and the relationship is: |f1|/|f2|=0.4409.

In the sixth embodiment, the focal length of the first lens 610 is f1, and the second mirror The composite focal length of the sheet 620 and the third lens 630 is f23, and the relationship is: |f1|/|f23|=0.59426.

In the sixth embodiment, the focal length of the second lens 620 is f2, and the combined focal length of the third lens 630 and the fourth lens 640 is f34, and the relationship is: |f2|/|f34|=2.38843.

In the sixth embodiment, the focal length of the fourth lens 640 is f4, and the focal length of the fifth lens 650 is f5, and the relationship is: |f4|/|f5|=1.12698.

In the sixth embodiment, the composite focal length of the first lens 610 and the second lens 620 is f12, and the overall composite focal length of the five-piece imaging lens group is f, and the relationship is: |f12|/|f|= 0.981891.

In the sixth embodiment, the composite focal length of the first lens 610, the second lens 620, and the third lens 630 is f123, and the overall composite focal length of the five-piece imaging lens group is f, and the relationship is: |f123 |/|f|=1.174148.

In the sixth embodiment, the image plane 670 has an image radius of IH, and the distance between the object side surface 611 of the first lens 610 and the image plane 670 is TL, and the relationship is: |IH/TL|=0.6283.

In the sixth embodiment, the overall composite focal length of the five-piece imaging lens group is f, and the distance between the object side surface 611 of the first lens 610 and the imaging surface 670 is TL, and the relationship is: |f/TL |=0.844369.

In the sixth embodiment, the refractive index of the first lens 610 is N1, the inverse dispersion ratio of the first lens 610 is V1 (also referred to as Abbe number), and the refractive index of the second lens 620 is N2. Inverse dispersion rate of the second lens 620 (again The Abbe number is V2, and the relationship is: N1=1.544; V1=56; N2=1.634; V2=23.9.

The detailed structural data of the sixth embodiment is as shown in Table 11 of FIG. 6C, and the aspherical data is as shown in Table 12 of FIG. 6D, wherein the unit of curvature radius, thickness and focal length is mm (mm). And the surfaces 2 and 3 included in Tables 11 and 12 are respectively the object of the first lens 610, the image side surfaces 611 and 612, and the surfaces 4 and 5 are the object and the image side surface of the second lens 620, respectively. 621, 622, the surfaces 6, 7 are the object of the third lens 630, the image side surfaces 631, 632, respectively, the surfaces 8, 9 are the object of the fourth lens 640, the image side surfaces 641, 642, the surface 10, 11 They are the object of the fifth lens 650 and the image side surfaces 651 and 652, respectively.

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 Figure 3C, and Figure 3D in Figure 3D Table 6, Table 7 in Figure 4C, Table 8 in Figure 4D, Table 9 in Figure 5C, Table 10 in Figure 5D, Table 11 in Figure 6C, Table in Figure 6D 12 is a different numerical value change table of each embodiment of the five-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 are still protected by the present invention. category. Table 13 in Fig. 7 is a correspondence table of the respective relational expressions in the respective embodiments.

In the five-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 flexural force configuration of the five-piece imaging lens group may be increased, if each lens material is Plastic Glue can effectively reduce production costs.

In the five-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, 300, 400, 500, 600‧‧‧

110, 210, 310, 410, 510, 610‧‧‧ first lens

111, 211, 311, 411, 511, 611‧‧‧ the object side surface of the first lens

112, 212, 312, 412, 512, 612‧‧‧ image side surface of the first lens

120, 220, 320, 420, 520, 620‧‧‧ second lens

121, 221, 321, 421, 521, 621‧‧‧ the side surface of the second lens

122, 222, 322, 422, 522, 622‧‧‧ image side surface of the second lens

130, 230, 330, 430, 530, 630‧‧ third lens

131, 231, 331, 431, 531, 631‧‧‧ the side surface of the third lens

132, 232, 332, 432, 532, 632‧‧‧ image side surface of the third lens

140, 240, 340, 440, 540, 640‧ ‧ fourth lens

141, 241, 341, 441, 541, 641‧ ‧ the object side surface of the fourth lens

142, 242, 342, 442, 542, 642‧‧‧ image side surface of the fourth lens

150, 250, 350, 450, 550, 650 ‧ ‧ fifth lens

151, 251, 351, 451, 551, 651‧‧ ‧ the object side surface of the fifth lens

152, 252, 352, 452, 552, 652‧‧‧ image side surface of the fifth lens

160, 260, 360, 460, 560, 660‧ ‧ infrared filter (IR Filter)

170, 270, 370, 470, 570, 670‧‧ ‧ imaging surface

180, 280, 380, 480, 580, 680‧‧‧ optical axis

f‧‧‧The overall composite focal length is

Fno‧‧‧ overall aperture value

2ω‧‧‧The corner is

f1‧‧‧The focal length of the first lens is

f2‧‧‧The focal length of the second lens is

f4‧‧‧The focal length of the fourth lens is

f5‧‧‧The focal length of the fifth lens is

f12‧‧‧The composite focal length of the first lens and the second lens is

f23‧‧‧The composite focal length of the second lens and the third lens is

F34‧‧‧The combined focal length of the third and fourth lenses is

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

TL‧‧‧The distance between the object side surface of the first lens and the imaging surface is

IH‧‧‧ imaging image image radius is

The refractive index of the first lens of N1‧‧‧ is

V1‧‧‧ inverse dispersion rate of the first lens

The refractive index of the N2‧‧‧ second lens is

The inverse dispersion rate of the second lens of V2‧‧‧

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

Fig. 1B is a view showing a spherical surface, a distortion line diagram, and an image plane curvature 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.

2B is a spherical surface, a curved line diagram, and an image curved view 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 view showing a spherical surface, a curved pay line diagram, and an image plane curved view of a 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.

Fig. 4A is an optical schematic view of a fourth embodiment of the present invention.

4B is a spherical surface, a curved line diagram, and an image plane curved surface according to a fourth embodiment of the present invention. Curved picture.

Figure 4C is a seventh embodiment of the optical data of the fourth embodiment.

The 4D figure is Table 8 and is the aspherical data of the fourth embodiment.

Fig. 5A is an optical schematic view of a fifth embodiment of the present invention.

Fig. 5B is a view showing a spherical surface, a distortion line diagram, and an image plane curvature diagram of a fifth embodiment of the present invention.

Figure 5C is a table showing the optical data of the fifth embodiment.

The fifth drawing is a tenth embodiment, which is the aspherical data of the fifth embodiment.

Fig. 6A is an optical schematic view of a sixth embodiment of the present invention.

Fig. 6B is a view showing a spherical surface, a curved pay line diagram, and an image plane curved view of a sixth embodiment of the present invention.

Fig. 6C is a chart showing the optical data of the sixth embodiment.

Fig. 6D is a table 12 showing the aspherical data of the sixth embodiment.

Figure 7 is a table 13 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‧‧‧Infrared filter (IR Filter)

170‧‧‧ imaging surface

180‧‧‧ optical axis

Claims (11)

A five-piece imaging lens set comprising, from the object side to the image side, a first lens having a positive refractive power, the object side surface being a convex surface, and at least one side of the object side surface and the image side surface of the first lens a non-spherical surface; 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 third lens having a positive refractive power, At least one side of the object side surface and the image side surface is aspherical; a fourth lens having a positive refractive power, the object side surface is a concave surface, the image side surface is a convex surface, and the object side surface and the image side surface of the fourth lens At least one side is aspherical; a fifth lens having a negative refractive power has a concave side on the image side surface, and at least one side of the object side surface and the image side surface of the fifth lens is aspherical. The refractive index of the first lens is N1, the inverse dispersion ratio of the first lens is V1, the refractive index of the second lens is N2, and the inverse dispersion ratio of the second lens is V2, which respectively satisfy the following relationship: N1 <1.57; V1>40; N2>1.57; V2<40. The five-piece imaging lens set of claim 1, further comprising a light barrier disposed between the first lens and the second lens. The five-piece imaging lens set of claim 1, further comprising a light barrier disposed before the side surface of the first lens. a five-piece imaging lens set as described in claim 1 of the patent application, wherein 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: 0.3<|f1|/|f2|<0.9. The five-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, both of which satisfy the following relationship: 0.3 <|f1|/|f23|<0.8. The five-piece imaging lens set according to claim 1, wherein the second lens has a focal length of f2, and the third lens and the fourth lens have a combined focal length of f34, and the two satisfy the following relationship: 0.7 <|f2|/|f34|<2.7. The five-piece imaging lens set according to claim 1, wherein the fourth lens has a focal length of f4 and the fifth lens has a focal length of f5, and the two satisfy the following relationship: 0.7<|f4|/| F5|<1.7. The five-piece imaging lens set according to claim 1, wherein the first lens and the second lens have a combined focal length of f12, and the overall composite focal length of the five-piece imaging lens group is f, both satisfying The following relationship: 0.75<|f12|/f<1.25. The five-piece imaging lens set according to claim 1, wherein the first lens, the second lens and the third lens have a combined focal length of f123, and the overall composite focal length of the five-piece imaging lens group is f, both satisfy the following relationship: 0.6 <| f123| / f < 0.25. The five-piece imaging lens set according to claim 1, wherein the imaging surface image radius is IH, 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: 0.55<|IH/TL|<0.95. The five-piece imaging lens set according to claim 1, wherein the overall synthetic focal length of the five-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: 0.75<|f/TL|<1.5.