TW201629569A - Optical imaging lens - Google Patents

Abstract

An optical imaging lens includes an aperture stop and an optical assembly, the optical assembly includes, in order from the object side to the image side: a first lens element with a positive refractive power; a second lens element with a negative refractive power; a third lens element with a positive refractive power; a fourth lens element with a positive refractive power; a fifth lens element with a negative refractive power; wherein a focal length of the optical imaging lens is f, a focal length of the first lens element is f1, a focal length of the second lens element is f2, a focal length of the third lens element is f3, a focal length of the fourth lens element is f4, a focal length of the fifth lens element is f5, a radius of curvature of an object-side surface of the fifth lens element is R9, a radius of curvature of an image-side surface of the fifth lens element is R10, and the following conditions are satisfied: |f5| < |fn|, n=1, 2, 3 and 4; -0.45 < f5/f < -0.2; 0 < (R9+R10)/(R9-R10) < 0.5.

Description

Optical imaging lens

The present invention relates to an optical lens, and more particularly to a miniaturized five-piece optical imaging lens for use in an electronic product.

The high-quality small photographic lens is the standard equipment of various mobile devices. With the advancement of semiconductor manufacturing, the pixel area on the electronic photosensitive element is getting smaller and smaller, which makes the camera lens need more detailed analysis. Force, in order to present a more detailed picture quality.

Conventional 3 to 4 small lenses, such as mobile phones, tablets, and other wearable electronic devices, such as US 7,564,635, US 7,920,340, can not display more detailed image quality; Small lenses may have better image quality. However, in large apertures, such as US 8,605,368, US 8,649,113, TW application numbers 102137030, 102121155, they are often accompanied by the sensitivity of manufacturing assembly, making mass production difficult and increasing. The cost of mass production. Or to reduce the assembly tolerance, the surrounding imaging quality must be sacrificed to blur or deform the surrounding image.

Therefore, the continuous development of a high-quality lens with high resolution and low manufacturing assembly tolerance is the motivation for the development of the present invention.

The object of the present invention is to provide an optical imaging lens, especially a five-piece optical imaging lens with high image count, high resolution, low distortion and low manufacturing tolerance.

In order to achieve the foregoing objective, an optical imaging lens according to the present invention comprises an aperture and an optical group, the optical group being sequentially included from the object side to the image side: a first through The mirror has a positive refractive power and is made of a plastic material. The object side surface has a convex surface at the near optical axis, and the object side surface and the image side surface are aspherical surfaces; a second lens has a negative refractive power and is made of a plastic material. The object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis, and the object side surface and the image side surface are aspherical surfaces; a third lens has positive refractive power and is made of plastic material. The object side surface has a convex surface near the optical axis, and the object side surface and the image side surface are all aspherical surfaces; a fourth lens has a positive refractive power and is made of a plastic material, and the object side surface is concave at the near optical axis. The image side surface of the image has a convex surface, and the object side surface and the image side surface are aspherical surfaces; a fifth lens has a negative refractive power and is made of a plastic material, and the object side surface is concave at the near optical axis. The image side surface has a concave surface at the near-optical axis, and the object side surface and the image side surface are all aspherical surfaces, and the object side surface and the image side surface are both provided with at least one inflection point; the aperture is disposed on the first lens Between the image side surface and a subject; wherein the optical imaging mirror The overall focal length is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, and the focal length of the fifth lens is f5. The radius of curvature of the object side surface of the fifth lens is R9, and the radius of curvature of the image side surface of the fifth lens is R10, and satisfies the following condition: |f5|<|fn|, where n=1, 2, 3, and 4 ;-0.45<f5/f<-0.2; 0<(R9+R10)/(R9-R10)<0.5.

When |f5|<|fn| satisfies the above conditions, the refractive powers of the first lens, the second lens, the third lens, and the fourth lens can be uniformly arranged, and the aberrations of the lens group can be balanced to make the lens aberration better. Imaging, and simultaneously reducing the assembly sensitivity of the first lens, the second lens, the third lens, and the fourth lens, further reducing the mass production cost.

When f5/f satisfies the above conditions, the refractive power of the fifth lens can be controlled to be in an appropriate range. Reducing the assembly sensitivity of the lens while maintaining a sufficiently long back focus to accommodate the infrared filtering filter element and providing the space required for the assembly of the electronic photosensitive element.

When (R9+R10)/(R9-R10) satisfies the above conditions, the appearance of the fifth lens can be controlled, so that when the aspherical surface shape is arranged, it is easy to control the internal reflection on each surface of the fifth lens. The ghost image is like this.

Preferably, the optical imaging lens has an overall focal length of f, and the first lens has a focal length of f1 and satisfies the following condition: 0.7 < f1/f < 0.81. Thereby, the refractive power of the first lens is maintained in an appropriate range, and the maximum angle of view (FOV) of the optical imaging lens is maintained at an appropriate angle while reducing the assembly sensitivity of the first lens.

Preferably, the optical imaging lens has an overall focal length of f, the second lens has a focal length of f2, and satisfies the following condition: -1.5 < f2 / f < -1. Thereby, the refractive power of the second lens is maintained in an appropriate range while reducing the assembly sensitivity of the second lens.

Preferably, the object side surface of the second lens has a radius of curvature R3, and the image side surface of the second lens has a radius of curvature of R4 and satisfies the following condition: 0.5<(R3-R4)/(R3+R4)<0.85 . Thereby, the spherical aberration and astigmatism of the optical imaging lens are effectively reduced.

Preferably, the distance from the aperture to the image side surface of the fifth lens on the optical axis is SD, and the distance from the object side surface of the first lens to the image side surface of the fifth lens on the optical axis is TD, and The following conditions are satisfied: 0.89 < SD / TD < 1.05. Thereby, the position of the aperture can be properly arranged, the main light entering the electronic photosensitive element can be matched with the electronic photosensitive element, the color shift phenomenon can be reduced, and the contrast of the image surface can be better, and the vignetting can be reduced.

Preferably, the thickness of the second lens on the optical axis is CT2, and the thickness of the third lens on the optical axis is CT3, and the following condition is satisfied: 2<CT3/CT2<3.5. Thereby, the molding thickness of the second lens and the third lens is effectively controlled, making injection molding easier.

Preferably, the optical imaging lens has an overall focal length of f, and the third lens has a focal length of f3 and satisfies the following condition: 4.5 < f3 / f < 12. Thereby, the refractive power of the third lens is maintained in an appropriate range while reducing the assembly sensitivity of the third lens.

Preferably, the optical imaging lens has an overall focal length of f, and the fourth lens has a focal length of f4 and satisfies the following condition: 0.25 < f4 / f < 0.6. Thereby, the refractive power of the fourth lens is maintained in an appropriate range, and the refractive power of the fifth lens is moderately dispersed to reduce the assembly sensitivity of the fourth lens and the fifth lens.

Preferably, the distance between the second lens and the third lens on the optical axis is T23, and the distance between the third lens and the fourth lens on the optical axis is T34, and the following condition is satisfied: 0.6<T23/T34 ≦1. Thereby, the total length of the optical imaging lens of the present invention is effectively reduced.

Preferably, the first lens has a dispersion coefficient of V1, the second lens has a dispersion coefficient of V2, the third lens has a dispersion coefficient of V3, the fourth lens has a dispersion coefficient of V4, and the fifth lens has a dispersion. The coefficient is V5 and satisfies the following conditions: -40 < V2-Vn < -25, where n = 1, 3, 4 and 5. Thereby, the chromatic aberration of the optical imaging lens of the present invention is effectively reduced.

In addition, in order to achieve the foregoing objective, an optical imaging lens according to the present invention includes an aperture and an optical group, and the optical group includes, in order from the object side to the image side, a first lens having a positive refractive power. The object side surface is convex at the near optical axis, and the object side surface and the image side surface are all aspherical surfaces; a second lens has a negative refractive power and is made of a plastic material, and the object side surface is convex at the near optical axis The image side surface of the image has a concave surface, and the object side surface and the image side surface are aspherical surfaces; a third lens has a positive refractive power and is made of a plastic material, and the object side surface is convex at the near optical axis. The object side surface and the image side surface are all aspherical surfaces; a fourth lens has a positive refractive power and is made of a plastic material, and the image side surface is convex at the near optical axis, and the object side surface and the image side surface are both Aspherical surface; a fifth lens, It has a negative refractive power and is made of a plastic material. The object side surface is concave at the near optical axis, and the image side surface is concave at the near optical axis, and the object side surface and the image side surface are aspherical surfaces, and the object side surface is The image side surface is provided with at least one inflection point; the aperture is disposed between the image side surface of the first lens and a subject; wherein the optical imaging lens has an overall focal length of f, and the focal length of the first lens is F1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, and the radius of curvature of the object side surface of the second lens is R3 The image side surface of the second lens has a radius of curvature of R4 and satisfies the following condition: |f5|<|f4|<|fn|, where n=1, 2, and 3; 0.5<(R3-R4)/(R3 +R4)<0.85.

When |f5|<|f4|<|fn| satisfies the above condition, the refractive powers of the first lens, the second lens, the third lens, and the fourth lens can be uniformly arranged, and the aberrations of the lens group can be balanced. The imaging is improved, and the assembly sensitivity of the first lens, the second lens, the third lens, and the fourth lens is simultaneously reduced, thereby further reducing the mass production cost.

When (R3-R4)/(R3+R4) satisfies the above conditions, the spherical aberration and astigmatism of the optical imaging lens are effectively reduced.

Preferably, the optical imaging lens has an overall focal length of f, and the first lens has a focal length of f1 and satisfies the following condition: 0.7 < f1/f < 0.81. Thereby, the refractive power of the first lens is maintained in an appropriate range, and the maximum angle of view (FOV) of the optical imaging lens is maintained at an appropriate angle while reducing the assembly sensitivity of the first lens.

Preferably, the optical imaging lens has an overall focal length of f, and the fifth lens has a focal length of f5 and satisfies the following condition: -0.45 < f5 / f < -0.2. Thereby, the refractive power of the fifth lens can be controlled to be in an appropriate range, the assembly sensitivity of the lens can be reduced, and a sufficiently long back focal length can be maintained at the same time to place the infrared filtering filter element and provide space for assembling the electronic photosensitive element. .

Preferably, the distance from the aperture to the image side surface of the fifth lens on the optical axis is SD, and the distance from the object side surface of the first lens to the image side surface of the fifth lens on the optical axis is TD, and The following conditions are satisfied: 0.89 < SD / TD < 1.05. Thereby, the position of the aperture can be properly arranged, the main light entering the electronic photosensitive element can be matched with the electronic photosensitive element, the color shift phenomenon can be reduced, and the contrast of the image surface can be better, and the vignetting can be reduced.

Preferably, the thickness of the third lens on the optical axis is CT3, and the thickness of the fourth lens on the optical axis is CT4, and the following condition is satisfied: 1<CT4/CT3<1.4. Thereby, the third lens and the fourth lens have an appropriate thickness, which makes injection molding easier.

Preferably, wherein the first lens has a dispersion coefficient of V1, the second lens has a dispersion coefficient of V2, the third lens has a dispersion coefficient of V3, and the fourth lens has a dispersion coefficient of V4, the fifth lens The dispersion coefficient is V5 and satisfies the following conditions: -40 < V2-Vn < -25, where n = 1, 3, 4, and 5. Thereby, the chromatic aberration of the optical imaging lens of the present invention is effectively reduced.

Preferably, the curvature radius of the object side surface of the fifth lens is R9, and the radius of curvature of the image side surface of the fifth lens is R10, and the following condition is satisfied: 0<(R9+R10)/(R9-R10)<0.5 . Thereby, the appearance of the fifth lens can be controlled such that when the aspherical surface shape is arranged, it is easy to control the ghost image generated by the internal reflection on each surface of the fifth lens.

Preferably, the optical imaging lens has an overall focal length of f, and the fourth lens has a focal length of f4 and satisfies the following condition: 0.25 < f4 / f < 0.6. Thereby, the refractive power of the fourth lens is maintained in an appropriate range, and the refractive power of the fifth lens is moderately dispersed to reduce the assembly sensitivity of the fourth lens and the fifth lens.

Preferably, the optical imaging lens has a maximum field of view of FOV and is full of the following conditions: 72 < FOV < 84. Thereby, the optical imaging lens can have a suitable larger angle of view.

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

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

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

111, 211, 311, 411, 511, 611, 711, 811 ‧ ‧ ‧ side surface

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

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

121, 221, 321, 421, 521, 621, 721, 821‧‧ ‧ side surfaces

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

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

131, 231, 331, 431, 531, 631, 731, 831 ‧ ‧ ‧ side surface

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

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

141, 241, 341, 441, 541, 641, 741, 841‧‧‧ ‧ side surfaces

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

150, 250, 350, 450, 550, 650, 750, 850 ‧ ‧ fifth lens

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

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

170, 270, 370, 470, 570, 670, 770, 870 ‧ ‧ infrared filter components

180, 280, 380, 480, 580, 680, 780, 880 ‧ ‧ imaging surface

190, 290, 390, 490, 590, 690, 790, 890‧‧‧ optical axis

f‧‧‧The focal length of the optical imaging lens

Aperture value of Fno‧‧‧ optical imaging lens

Half of the maximum field of view in a HFOV‧‧ optical imaging lens

Maximum field of view in FOV‧‧·optical imaging lenses

F1‧‧‧The focal length of the first lens

F2‧‧‧The focal length of the second lens

f3‧‧‧The focal length of the third lens

F4‧‧‧The focal length of the fourth lens

f5‧‧‧Focus of the fifth lens

R3‧‧‧ radius of curvature of the object side surface of the second lens

R4‧‧‧ Image side surface radius of curvature of the second lens

Radius radius of the object side surface of R9‧‧‧ fifth lens

Image side surface radius of curvature of R10‧‧‧ fifth lens

V2‧‧‧Dispersion coefficient of the second lens

CT2‧‧‧ thickness of the second lens on the optical axis

CT3‧‧‧ thickness of the third lens on the optical axis

CT4‧‧‧ thickness of the fourth lens on the optical axis

TD‧‧‧distance from the object side surface of the first lens to the image side surface of the fifth lens on the optical axis

Distance from SD‧‧‧ aperture to the image side surface of the fifth lens on the optical axis

T23‧‧‧Separation distance between the second lens and the third lens on the optical axis

T34‧‧‧The distance between the third lens and the fourth lens on the optical axis

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

1B is a spherical aberration, astigmatism, and distortion curve of the optical imaging lens of the first embodiment, from left to right.

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

2B is a spherical aberration, astigmatism, and distortion curve of the optical imaging lens of the second embodiment, from left to right.

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

3B is a spherical aberration, astigmatism, and distortion curve of the optical imaging lens of the third embodiment, from left to right.

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

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

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

Fig. 5B is a spherical aberration, astigmatism, and distortion curve of the optical imaging lens of the fifth embodiment, from left to right.

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

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

Fig. 7A is a schematic view showing an optical imaging lens of a seventh embodiment of the present invention.

7B is a spherical aberration, astigmatism, and distortion curve of the optical imaging lens of the seventh embodiment, from left to right.

Fig. 8A is a schematic view showing an optical imaging lens of an eighth embodiment of the present invention.

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

<First Embodiment>

1A and FIG. 1B, FIG. 1A is a schematic diagram of an optical imaging lens according to a first embodiment of the present invention, and FIG. 1B is a spherical aberration and astigmatism of the optical imaging lens of the first embodiment from left to right. And the distortion curve. As shown in FIG. 1A, the optical imaging lens includes an aperture 100 and an optical group. The optical group sequentially includes a first lens 110, a second lens 120, a third lens 130, and a fourth lens 140 from the object side to the image side. The fifth lens 150, the infrared filter element 170, and the imaging surface 180, wherein the optical imaging lens has five sheets of refractive power. The aperture 100 is disposed between the image side surface 112 of the first lens 110 and the subject.

The first lens 110 has a positive refractive power and is made of a plastic material. The object side surface 111 is convex at the near optical axis 190, and the image side surface 112 is concave at the near optical axis 190, and the object side surface 111 and the image side are Surface 112 is aspherical.

The second lens 120 has a negative refractive power and is made of a plastic material. The object side surface 121 is convex at the near optical axis 190, and the image side surface 122 is concave at the near optical axis 190, and the object side surface 121 and the image side are Surface 122 is aspherical.

The third lens 130 has a positive refractive power and is made of a plastic material. The object side surface 131 is convex at the near optical axis 190, and the image side surface 132 is concave at the near optical axis 190, and the object side surface 131 and the image side are The surfaces 132 are all aspherical.

The fourth lens 140 has a positive refractive power and is made of a plastic material. The object side surface 141 is concave at the near optical axis 190, and the image side surface 142 is convex at the near optical axis 190, and the object side surface 141 and the image side are Surfaces 142 are all aspherical.

The fifth lens 150 has a negative refractive power and is made of a plastic material, and the object side surface 151 is concave at the near optical axis 190, and the image side surface 152 is concave at the near optical axis 190, and the object side surface 151 and the image side are The surface 152 is aspherical, and the object side surface 151 and the image side surface 152 are each provided with at least one inflection point.

The infrared filter element 170 is made of glass and disposed between the fifth lens 150 and the imaging surface 180 without affecting the focal length of the optical imaging lens.

The aspherical curve equations of the above lenses are expressed as follows:

Where z is the position value with reference to the surface apex at a position of height h in the direction of the optical axis 190; c is the curvature of the lens surface near the optical axis 190, and is the reciprocal of the radius of curvature (R) (c = 1/R) R is the radius of curvature of the lens surface near the optical axis 190, h is the vertical distance of the lens surface from the optical axis 190, k is a conic constant, and A ₄ , A ₆ , A ₈ , A ₁₀ , A ₁₂ , A ₁₄ is an aspheric coefficient of four, six, eight, ten, twelve, and fourteenth steps, respectively.

In the optical imaging lens of the first embodiment, the focal length of the optical imaging lens is f, the aperture value (f-number) of the optical imaging lens is Fno, and the half of the maximum angle of view in the optical imaging lens is HFOV, and the values are as follows: f = 3.66 (mm); Fno = 2.1; and HFOV = 38.2 (degrees).

In the optical imaging lens of the first embodiment, the focal length of the first lens 110 is f1, the focal length of the second lens 120 is f2, the focal length of the third lens 130 is f3, and the focal length of the fourth lens 140 is f4. The focal length of the fifth lens 150 is f5, and satisfies the following condition: |f5|<|fn|, where n=1, 2, 3, and 4; |f5|<|f4|<|fn|, where n=1 2 and 3.

In the optical imaging lens of the first embodiment, the overall focal length of the optical imaging lens is f, the focal length of the fifth lens 150 is f5, and the following condition is satisfied: f5/f = -0.36.

In the optical imaging lens of the first embodiment, the object side surface 151 of the fifth lens 150 has a radius of curvature R9, and the image side surface 152 of the fifth lens 150 has a radius of curvature of R10 and satisfies the following condition: (R9+R10) /(R9-R10)=0.16.

In the optical imaging lens of the first embodiment, the overall focal length of the optical imaging lens is f, the focal length of the first lens 110 is f1, and the following condition is satisfied: f1/f=0.77.

In the optical imaging lens of the first embodiment, the overall focal length of the optical imaging lens is f, the focal length of the second lens 120 is f2, and the following condition is satisfied: f2/f = -1.34.

In the optical imaging lens of the first embodiment, the object side surface 121 of the second lens 120 has a radius of curvature R3, and the image side surface 122 of the second lens 120 has a radius of curvature of R4 and satisfies the following condition: (R3-R4) /(R3+R4)=0.62.

In the optical imaging lens of the first embodiment, the distance from the image side surface 152 of the aperture 100 to the fifth lens 150 to the optical axis 190 is SD, and the object side surface 111 of the first lens 110 to the fifth lens 150 The distance of the image side surface 152 on the optical axis 190 is TD, and the following condition is satisfied: SD/TD = 0.92.

In the optical imaging lens of the first embodiment, the thickness of the second lens 120 on the optical axis 190 is CT2, and the thickness of the third lens 130 on the optical axis 190 is CT3, and the following conditions are satisfied: CT3/CT2=2.62 .

In the optical imaging lens of the first embodiment, the overall focal length of the optical imaging lens is f, the focal length of the third lens 130 is f3, and the following condition is satisfied: f3/f = 7.00.

In the optical imaging lens of the first embodiment, the overall focal length of the optical imaging lens is f, the focal length of the fourth lens 140 is f4, and the following condition is satisfied: f4/f = 0.42.

In the optical imaging lens of the first embodiment, the distance between the second lens 120 and the third lens 130 on the optical axis 190 is T23, and the distance between the third lens 130 and the fourth lens 140 on the optical axis 190 is T34, and the following conditions are met: T23/T34=0.77.

In the optical imaging lens of the first embodiment, the maximum angle of view of the optical imaging lens is FOV, and the following condition is exceeded: FOV=76.42.

In the optical imaging lens of the first embodiment, the thickness of the third lens 130 on the optical axis 190 is CT3, and the thickness of the fourth lens 140 on the optical axis 190 is CT4, and the following conditions are satisfied: CT4/CT3=1.11 .

In the optical imaging lens of the first embodiment, the first lens 110 has a dispersion coefficient of V1, the second lens 120 has a dispersion coefficient of V2, the third lens 130 has a dispersion coefficient of V3, and the fourth lens 140 has a dispersion. The coefficient is V4, and the dispersion coefficient of the fifth lens 150 is V5, and the following condition is satisfied: V2-Vn=-33.90, where n=1, 3, 4, and 5.

Refer to Table 1 and Table 2 below for reference.

Table 1 is the detailed structural data of the first embodiment of Fig. 1A, in which the unit of curvature radius, thickness and focal length is mm, and the surface 0-14 sequentially represents the surface from the object side to the image side. Table 2 shows the aspherical data in the first embodiment, in which the taper coefficients in the equation of the aspherical curve of k, and A4-A14 represent the aspherical coefficients of the fourth to fourth orders of each surface. In addition, the table of the following embodiments corresponds to the schematic diagram and the aberration diagram of each embodiment, and the definition of the data in the table is the same as the definitions of Table 1 and Table 2 of the first embodiment, and details are not described herein.

<Second embodiment>

2A and FIG. 2B, FIG. 2A is a schematic diagram of an optical imaging lens according to a second embodiment of the present invention, and FIG. 2B is a spherical aberration and astigmatism of the optical imaging lens of the second embodiment from left to right. And the distortion curve. As can be seen from FIG. 2A, the optical imaging lens includes an aperture 200 and a light. In the optical group, the first lens 210, the second lens 220, the third lens 230, the fourth lens 240, the fifth lens 250, the infrared filter element 270, and the imaging are sequentially included from the object side to the image side. Face 280, wherein the lens of the optical imaging lens with refractive power is five pieces. The aperture 200 is disposed between the image side surface 212 of the first lens 210 and the object.

The first lens 210 has a positive refractive power and is made of a plastic material. The object side surface 211 is convex at the near optical axis 290, and the image side surface 212 is convex at the near optical axis 290, and the object side surface 211 and the image side are Surface 212 is aspherical.

The second lens 220 has a negative refractive power and is made of a plastic material. The object side surface 221 is convex at the near optical axis 290, and the image side surface 222 is concave at the near optical axis 290, and the object side surface 221 and the image side are Surfaces 222 are all aspherical.

The third lens 230 has a positive refractive power and is made of a plastic material. The object side surface 231 is convex at the near optical axis 290, and the image side surface 232 is concave at the near optical axis 290, and the object side surface 231 and the image side are Surfaces 232 are all aspherical.

The fourth lens 240 has a positive refractive power and is made of a plastic material. The object side surface 241 is concave at the near optical axis 290, and the image side surface 242 is convex at the near optical axis 290, and the object side surface 241 and the image side are Surface 242 is aspherical.

The fifth lens 250 has a negative refractive power and is made of a plastic material, and the object side surface 251 is concave at the near optical axis 290, and the image side surface 252 is concave at the near optical axis 290, and the object side surface 251 and the image side are The surface 252 is aspherical, and the object side surface 251 and the image side surface 252 are both provided with at least one inflection point.

The infrared filter element 270 is made of glass and disposed between the fifth lens 250 and the imaging surface 280 without affecting the focal length of the optical imaging lens.

Refer to Table 3 and Table 4 below.

In the second embodiment, the aspherical curve equation represents the form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and are not described herein.

With Table 3 and Table 4, the following data can be derived:

<Third embodiment>

Please refer to FIG. 3A and FIG. 3B , wherein FIG. 3A is a schematic diagram of an optical imaging lens according to a third embodiment of the present invention, and FIG. 3B is a spherical aberration and astigmatism of the optical imaging lens of the third embodiment from left to right. And the distortion curve. As shown in FIG. 3A, the optical imaging lens includes an aperture 300 and an optical group. The optical group includes a first lens 310, a second lens 320, a third lens 330, and a fourth lens 340 from the object side to the image side. The fifth lens 350, the infrared filter element 370, and the imaging surface 380, wherein the lens of the optical imaging lens has a refractive power of five. The aperture 300 is disposed between the image side surface 312 of the first lens 310 and the subject.

The first lens 310 has a positive refractive power and is made of a plastic material. The object side surface 311 is convex at the near optical axis 390, and the image side surface 312 is concave at the near optical axis 390, and the object side surface 311 and the image side are Surfaces 312 are all aspherical.

The second lens 320 has a negative refractive power and is made of a plastic material. The object side surface 321 is convex at the near optical axis 390, and the image side surface 322 is concave at the near optical axis 390, and the object side surface 321 and the image side are Surfaces 322 are all aspherical.

The third lens 330 has a positive refractive power and is made of a plastic material. The object side surface 331 is convex at the near optical axis 390, and the image side surface 332 is concave at the near optical axis 390, and the object side surface 331 and the image side are Surface 332 is aspherical.

The fourth lens 340 has a positive refractive power and is made of a plastic material. The object side surface 341 is concave at the near optical axis 390, and the image side surface 342 is convex at the near optical axis 390, and the object side surface 341 and the image side are Surfaces 342 are all aspherical.

The fifth lens 350 has a negative refractive power and is made of a plastic material. The object side surface 351 is concave at the near optical axis 390, and the image side surface 352 is concave at the near optical axis 390, and the object side surface 351 and the image side are The surface 352 is aspherical, and the object side surface 351 and the image side surface 352 are both provided with at least one inflection point.

The infrared filter element 370 is made of glass and disposed between the fifth lens 350 and the imaging surface 380 without affecting the focal length of the optical imaging lens.

Refer to Table 5 and Table 6 below for reference.

In the third embodiment, the aspherical curve equation represents the form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and are not described herein.

With Table 5 and Table 6, the following data can be derived:

<Fourth embodiment>

4A and 4B, wherein FIG. 4A is a schematic diagram of an optical imaging lens according to a fourth embodiment of the present invention, and FIG. 4B is a spherical aberration and astigmatism of the optical imaging lens of the fourth embodiment from left to right. And the distortion curve. As shown in FIG. 4A, the optical imaging lens includes an aperture 400 and an optical group. The optical group includes a first lens 410, a second lens 420, a third lens 430, and a fourth lens 440 from the object side to the image side. The fifth lens 450, the infrared filter element 470, and the imaging surface 480, wherein the optical imaging lens has five sheets of refractive power. The aperture 400 is disposed between the image side surface 412 of the first lens 410 and the object.

The first lens 410 has a positive refractive power and is made of a plastic material. The object side surface 411 is convex at the near optical axis 490, and the image side surface 412 is concave at the near optical axis 490, and the object side surface 411 and the image side are Surface 412 is aspherical.

The second lens 420 has a negative refractive power and is made of a plastic material. The object side surface 421 is convex at the near optical axis 490, and the image side surface 422 is concave at the near optical axis 490, and the object side surface 421 and the image side are Surface 422 is aspherical.

The third lens 430 has a positive refractive power and is made of a plastic material. The object side surface 431 is convex at the near optical axis 490, and the image side surface 432 is concave at the near optical axis 490, and the object side surface 431 and the image side are Surface 432 is aspherical.

The fourth lens 440 has a positive refractive power and is made of a plastic material. The object side surface 441 is concave at the near optical axis 490, and the image side surface 442 is convex at the near optical axis 490, and the object side surface 441 and the image side are Surface 442 is aspherical.

The fifth lens 450 has a negative refractive power and is made of a plastic material. The object side surface 451 is concave at the near optical axis 490, and the image side surface 452 is concave at the near optical axis 490, and the object side surface 451 and the image side are The surface 452 is aspherical, and the object side surface 451 and the image side surface 452 are both provided with at least one inflection point.

The infrared filter element 470 is made of glass and disposed between the fifth lens 450 and the imaging surface 480 without affecting the focal length of the optical imaging lens.

Refer to Table 7 and Table 8 below for reference.

In the fourth embodiment, the aspherical curve equation represents the form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and are not described herein.

The following data can be derived from Table 7 and Table 8:

<Fifth Embodiment>

5A and 5B, wherein FIG. 5A is a schematic diagram of an optical imaging lens according to a fifth embodiment of the present invention, and FIG. 5B is a spherical aberration and astigmatism of the optical imaging lens of the fifth embodiment from left to right. And the distortion curve. As shown in FIG. 5A, the optical imaging lens includes an aperture 500 and an optical group. The optical group includes a first lens 510, a second lens 520, a third lens 530, and a fourth lens 540 from the object side to the image side. The fifth lens 550, the infrared filter element 570, and the imaging surface 580, wherein the optical imaging lens has five sheets of refractive power. The aperture 500 is disposed between the image side surface 512 of the first lens 510 and the subject.

The first lens 510 has a positive refractive power and is made of a plastic material. The object side surface 511 is convex at the near optical axis 590, and the image side surface 512 is concave at the near optical axis 590, and the object side surface 511 and the image side are Surface 512 is aspherical.

The second lens 520 has a negative refractive power and is made of a plastic material. The object side surface 521 is convex at the near optical axis 590, and the image side surface 522 is concave at the near optical axis 590, and the object side surface 521 and the image side are Surface 522 is aspherical.

The third lens 530 has a positive refractive power and is made of a plastic material. The object side surface 531 is convex at the near optical axis 590, and the image side surface 532 is concave at the near optical axis 590, and the object side surface 531 and the image side are Surface 532 is aspherical.

The fourth lens 540 has a positive refractive power and is made of a plastic material. The object side surface 541 is concave at the near optical axis 590, and the image side surface 542 is convex at the near optical axis 590, and the object side surface 541 and the image side are Surface 542 is aspherical.

The fifth lens 550 has a negative refractive power and is made of a plastic material. The object side surface 551 is concave at the near optical axis 590, and the image side surface 552 is concave at the near optical axis 590, and the object side surface 551 and the image side are The surface 552 is aspherical, and the object side surface 551 and the image side surface 552 are both provided with at least one inflection point.

The infrared filter element 570 is made of glass and disposed between the fifth lens 550 and the imaging surface 580 without affecting the focal length of the optical imaging lens.

Refer to Table 9 and Table 10 below.

In the fifth embodiment, the aspherical curve equation represents the form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and are not described herein.

The following data can be derived from Table 9 and Table 10:

<Sixth embodiment>

6A and 6B, wherein FIG. 6A is a schematic diagram of an optical imaging lens according to a sixth embodiment of the present invention, and FIG. 6B is a spherical aberration and astigmatism of the optical imaging lens of the sixth embodiment from left to right. And the distortion curve. As shown in FIG. 6A, the optical imaging lens includes an aperture 600 and an optical group. The optical group sequentially includes a first lens 610, a second lens 620, a third lens 630, and a fourth lens 640 from the object side to the image side. The fifth lens 650, the infrared filter element 670, and the imaging surface 680, wherein the lens of the optical imaging lens has a refractive power of five. The aperture 600 is disposed between the image side surface 612 of the first lens 610 and the object.

The first lens 610 has a positive refractive power and is made of a plastic material. The object side surface 611 is convex at the near optical axis 690, and the image side surface 612 is concave at the near optical axis 690, and the object side surface 611 and the image side are Surface 612 is aspherical.

The second lens 620 has a negative refractive power and is made of a plastic material. The object side surface 621 is convex at the near optical axis 690, and the image side surface 622 is concave at the near optical axis 690, and the object side surface 621 and the image side are Surface 622 is aspherical.

The third lens 630 has a positive refractive power and is made of a plastic material. The object side surface 631 is convex at the near optical axis 690, and the image side surface 632 is concave at the near optical axis 690, and the object side surface 631 and the image side are Surface 632 is aspherical.

The fourth lens 640 has a positive refractive power and is made of a plastic material. The object side surface 641 is concave at the near optical axis 690, and the image side surface 642 is convex at the near optical axis 690, and the object side surface 641 and the image side are Surface 642 is aspherical.

The fifth lens 650 has a negative refractive power and is made of a plastic material. The object side surface 651 is concave at the near optical axis 690, and the image side surface 652 is concave at the near optical axis 690, and the object side surface 651 and the image side are The surface 652 is aspherical, and the object side surface 651 and the image side surface 652 are both provided with at least one inflection point.

The infrared filter element 670 is made of glass and disposed between the fifth lens 650 and the imaging surface 680 without affecting the focal length of the optical imaging lens.

Referring again to Table 11 and Table 12 below.

In the sixth embodiment, the aspherical curve equation represents the form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and are not described herein.

The following data can be derived from Table 11 and Table 12:

<Seventh embodiment>

Please refer to FIG. 7A and FIG. 7B , wherein FIG. 7A is a schematic diagram of an optical imaging lens according to a seventh embodiment of the present invention, and FIG. 7B is a spherical aberration and astigmatism of the optical imaging lens of the seventh embodiment from left to right. And the distortion curve. As shown in FIG. 7A, the optical imaging lens includes an aperture 700 and an optical group. The optical group sequentially includes a first lens 710, a second lens 720, a third lens 730, and a fourth lens 740 from the object side to the image side. a fifth lens 750, an infrared filter element 770, and an imaging surface 780, The lens of the optical imaging lens with refractive power is five pieces. The aperture 700 is disposed between the image side surface 712 of the first lens 710 and the subject.

The first lens 710 has a positive refractive power and is made of a plastic material. The object side surface 711 is convex at the near optical axis 790, and the image side surface 712 is concave at the near optical axis 790, and the object side surface 711 and the image side are Surface 712 is aspherical.

The second lens 720 has a negative refractive power and is made of a plastic material. The object side surface 721 is convex at the near optical axis 790, and the image side surface 722 is concave at the near optical axis 790, and the object side surface 721 and the image side are Surface 722 is aspherical.

The third lens 730 has a positive refractive power and is made of a plastic material. The object side surface 731 is convex at the near optical axis 790, and the image side surface 732 is concave at the near optical axis 790, and the object side surface 731 and the image side are Surface 732 is aspherical.

The fourth lens 740 has a positive refractive power and is made of a plastic material. The object side surface 741 is concave at the near optical axis 790, and the image side surface 742 is convex at the near optical axis 790, and the object side surface 741 and the image side are Surface 742 is aspherical.

The fifth lens 750 has a negative refractive power and is made of a plastic material. The object side surface 751 is concave at the near optical axis 790, and the image side surface 752 is concave at the near optical axis 790, and the object side surface 751 and the image side are The surface 752 is aspherical, and the object side surface 751 and the image side surface 752 are both provided with at least one inflection point.

The infrared filter element 770 is made of glass and disposed between the fifth lens 750 and the imaging surface 780 without affecting the focal length of the optical imaging lens.

Refer to Table 13 and Table 14 below.

In the seventh embodiment, the aspherical curve equation represents the form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and are not described herein.

The following data can be derived from Table 13 and Table 14:

<Eighth Embodiment>

8A and 8B, wherein FIG. 8A is a schematic diagram of an optical imaging lens according to an eighth embodiment of the present invention, and FIG. 8B is a spherical aberration and astigmatism of the optical imaging lens of the eighth embodiment from left to right. And the distortion curve. As shown in FIG. 8A, the optical imaging lens includes an aperture 800 and an optical group. The optical group sequentially includes a first lens 810, a second lens 820, a third lens 830, and a fourth lens 840 from the object side to the image side. The fifth lens 850, the infrared filter element 870, and the imaging surface 880, wherein the optical imaging lens has five sheets of refractive power. The aperture 800 is disposed between the image side surface 812 of the first lens 810 and the subject.

The first lens 810 has a positive refractive power and is made of a plastic material. The object side surface 811 is convex at the near optical axis 890, and the image side surface 812 is concave at the near optical axis 890, and the object side surface 811 and the image side are Surface 812 is aspherical.

The second lens 820 has a negative refractive power and is made of a plastic material. The object side surface 821 is convex at the near optical axis 890, and the image side surface 822 is concave at the near optical axis 890, and the object side surface 821 and the image side are Surface 822 is aspherical.

The third lens 830 has a positive refractive power and is made of a plastic material. The object side surface 831 is convex at the near optical axis 890, and the image side surface 832 is convex at the near optical axis 890, and the object side surface 831 and the image side are Surface 832 is aspherical.

The fourth lens 840 has a positive refractive power and is made of a plastic material. The object side surface 841 is concave at the near optical axis 890, and the image side surface 842 is convex at the near optical axis 890, and the object side surface 841 and the image side are Surface 842 is aspherical.

The fifth lens 850 has a negative refractive power and is made of a plastic material. The object side surface 851 is concave at the near optical axis 890, and the image side surface 852 is concave at the near optical axis 890, and the object side surface 851 and the image side are The surface 852 is aspherical, and the object side surface 851 and the image side surface 852 are both provided with at least one inflection point.

The infrared filter element 870 is made of glass and disposed between the fifth lens 850 and the imaging surface 880 without affecting the focal length of the optical imaging lens.

Refer to Table 15 and Table 16 below for reference.

In the eighth embodiment, the aspherical curve equation represents the form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and are not described herein.

The following data can be derived from Table 15 and Table 16:

The optical imaging lens provided by the invention can be made of plastic or glass. When the lens material is plastic, the production cost can be effectively reduced. When the lens is made of glass, the degree of freedom of the refractive power of the optical imaging lens can be increased. In addition, the object side surface of the lens in the optical imaging lens and The image side surface may be an aspherical surface, and the aspherical surface can be easily formed into a shape other than the spherical surface, and more control variables are obtained to reduce the aberration and thereby reduce the number of lenses used, thereby effectively reducing the total length of the optical imaging lens of the present invention. degree.

In the optical imaging lens provided by the present invention, in the case of a lens having a refractive power, if the surface of the lens is convex and the position of the convex surface is not defined, it indicates that the surface of the lens is convex at the near optical axis; When the concave surface is not defined and the concave position is not defined, it indicates that the lens surface is concave at the near optical axis.

The optical imaging lens provided by the invention is more suitable for the optical system of moving focus, and has the characteristics of excellent aberration correction and good imaging quality, and can be applied to 3D (3D) image capturing, digital camera, and action in various aspects. In electronic imaging systems such as devices, digital tablets or car photography.

In the above, the above embodiments and drawings are only the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, that is, the equivalent changes and modifications made by the scope of the present invention are all It should be within the scope of the patent of the present invention.

100‧‧‧ aperture

110‧‧‧first lens

111‧‧‧Side side surface

112‧‧‧ image side surface

120‧‧‧second lens

121‧‧‧Side side surface

122‧‧‧ image side surface

130‧‧‧ third lens

131‧‧‧ object side surface

132‧‧‧Image side surface

140‧‧‧Fourth lens

141‧‧‧ object side surface

142‧‧‧ image side surface

150‧‧‧ fifth lens

151‧‧‧ object side surface

152‧‧‧ image side surface

170‧‧‧Infrared filter components

180‧‧‧ imaging surface

190‧‧‧ optical axis

Claims (19)

An optical imaging lens includes an aperture and an optical group. The optical group is sequentially included from the object side to the image side: a first lens having a positive refractive power and being made of a plastic material, the object side surface being near the optical axis The convex surface, the object side surface and the image side surface are all aspherical surfaces; a second lens has a negative refractive power and is made of a plastic material, and the object side surface is convex at the near optical axis, and the image side surface is near the optical axis It is a concave surface, and both the object side surface and the image side surface are aspherical surfaces; a third lens has a positive refractive power and is made of a plastic material, and the object side surface is convex at the near optical axis, and the object side surface and the image side surface thereof are All of them are aspherical surfaces; a fourth lens has a positive refractive power and is made of a plastic material, and the object side surface is concave at the near optical axis, and the image side surface is convex at the near optical axis, and the object side surface and the image side surface thereof All of them are aspherical surfaces; a fifth lens has a negative refractive power and is made of a plastic material, and the object side surface is concave at the near optical axis, and the image side surface is concave at the near optical axis, and the object side surface and the image side surface thereof are concave surfaces. All are aspherical, and both the object side surface and the image side surface are provided. There is at least one inflection point; the aperture is disposed between the image side surface of the first lens and a subject; wherein the optical imaging lens has an overall focal length of f, the first lens has a focal length of f1, and the second The focal length of the lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, and the radius of curvature of the object side surface of the fifth lens is R9, the fifth lens The image side surface has a radius of curvature of R10 and satisfies the following condition: |f5|<|fn|, where n=1, 2, 3, and 4; -0.45<f5/f<-0.2; 0<(R9+R10) /(R9-R10)<0.5. The optical imaging lens according to claim 1, wherein an overall focal length of the optical imaging lens is f, a focal length of the first lens is f1, and the following condition is satisfied: 0.7 < f1/f < 0.81. The optical imaging lens according to claim 1, wherein the optical imaging lens has an overall focal length of f, the second lens has a focal length of f2, and satisfies the following condition: -1.5 < f2 / f < -1. The optical imaging lens according to claim 3, wherein the object side surface of the second lens has a radius of curvature R3, and the image side surface of the second lens has a radius of curvature of R4 and satisfies the following condition: 0.5 < (R3-R4) /(R3+R4)<0.85. The optical imaging lens according to claim 1, wherein the distance from the aperture to the image side surface of the fifth lens on the optical axis is SD, and the object side surface of the first lens to the image side surface of the fifth lens is light The distance on the axis is TD and the following conditions are met: 0.89<SD/TD<1.05. The optical imaging lens according to claim 5, wherein the thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, and the following condition is satisfied: 2<CT3/CT2<3.5 . The optical imaging lens according to claim 5, wherein the optical imaging lens has an overall focal length of f, the third lens has a focal length of f3, and satisfies the following condition: 4.5 < f3 / f < 12. The optical imaging lens according to claim 1, wherein the optical imaging lens has an overall focal length of f, the fourth lens has a focal length of f4, and satisfies the following condition: 0.25 < f4 / f < 0.6. The optical imaging lens of claim 5, wherein a distance between the second lens and the third lens on the optical axis is T23, and a distance between the third lens and the fourth lens on the optical axis is T34, and is satisfied. The following conditions are: 0.6 < T23 / T34 ≦ 1. The optical imaging lens of claim 5, wherein the first lens has a dispersion coefficient of V1, the second lens has a dispersion coefficient of V2, the third lens has a dispersion coefficient of V3, and the fourth lens has a dispersion coefficient of V4, the fifth lens has a dispersion coefficient of V5 and satisfies the following condition: -40 < V2-Vn < -25, wherein n = 1, 3, 4, and 5. An optical imaging lens comprising an aperture and an optical group, the optical group being sequentially included from the object side to the image side: a first lens having a positive refractive power, and an object side surface having a convex surface at a near optical axis, The side surface and the image side surface are all aspherical surfaces; a second lens has a negative refractive power and is made of a plastic material, and the object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The side surface and the image side surface are all aspherical surfaces; a third lens has a positive refractive power and is made of a plastic material, and the object side surface is convex at the near optical axis, and the object side surface and the image side surface are aspherical surfaces; a fourth lens having a positive refractive power and a plastic material, wherein the image side surface has a convex surface at a near optical axis, and the object side surface and the image side surface are aspherical surfaces; a fifth lens has a negative refractive power, and The plastic material has a concave surface at the near-optical axis of the object side surface, and the image side surface has a concave surface at the near-optical axis, and the object side surface and the image side surface are both aspherical surfaces, and the object side surface and the image side surface are both provided with At least one inflection point; the aperture is disposed on the first lens Between the image side surface and a subject; wherein the optical imaging lens has an overall focal length of f, the first lens has a focal length of f1, the second lens has a focal length of f2, and the third lens has a focal length of f3, The focal length of the fourth lens is f4, and the focal length of the fifth lens For f5, the radius of curvature of the object side surface of the second lens is R3, and the radius of curvature of the image side surface of the second lens is R4, and the following condition is satisfied: |f5|<|f4|<|fn|, where n=1 , 2 and 3; 0.5 < (R3-R4) / (R3 + R4) < 0.85. The optical imaging lens of claim 11, wherein the optical imaging lens has an overall focal length of f, the first lens has a focal length of f1, and satisfies the following condition: 0.7 < f1/f < 0.81. The optical imaging lens according to claim 11, wherein the optical imaging lens has an overall focal length of f, the fifth lens has a focal length of f5, and satisfies the following condition: - 0.45 < f5 / f < - 0.2. The optical imaging lens according to claim 11, wherein the distance from the aperture to the image side surface of the fifth lens on the optical axis is SD, and the object side surface of the first lens to the image side surface of the fifth lens is light The distance on the axis is TD and the following conditions are met: 0.89<SD/TD<1.05. The optical imaging lens according to claim 14, wherein the thickness of the third lens on the optical axis is CT3, the thickness of the fourth lens on the optical axis is CT4, and the following condition is satisfied: 1<CT4/CT3<1.4 . The optical imaging lens according to claim 15, wherein the first lens has a dispersion coefficient of V1, the second lens has a dispersion coefficient of V2, the third lens has a dispersion coefficient of V3, and the fourth lens has a dispersion coefficient of V4, the fifth lens has a dispersion coefficient of V5 and satisfies the following condition: -40 < V2-Vn < -25, wherein n = 1, 3, 4, and 5. The optical imaging lens according to claim 11, wherein the object side surface of the fifth lens has a radius of curvature R9, and the image side surface of the fifth lens has a radius of curvature of R10 and satisfies the following condition: 0<(R9+R10) /(R9-R10)<0.5. The optical imaging lens according to claim 14, wherein the optical imaging lens has an overall focal length of f, the fourth lens has a focal length of f4, and satisfies the following condition: 0.25 < f4 / f < 0.6. The optical imaging lens of claim 18, wherein the optical imaging lens has a maximum field of view of FOV and is full of the following condition: 72 < FOV < 84.