阅读说明：本技术 光学成像镜头 (Optical imaging lens ) 是由 谢典良 于 2018-09-14 设计创作，主要内容包括：本发明公开了一种光学成像镜头,从物侧至像侧沿一光轴依序包括一光圈、一第一透镜、一第二透镜、一第三透镜、一第四透镜及一第五透镜。光学成像镜头中具有屈光度的透镜只有上述五片透镜。第一透镜至第五透镜的屈光度依序为正、负、负、负、正。第一透镜的物侧面为凸面。第二透镜的物侧面为凸面,且第二透镜的像侧面为凹面。第三透镜的像侧面为凹面。第四透镜的物侧面为凹面。(The invention discloses an optical imaging lens which sequentially comprises an aperture, a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side along an optical axis. The optical imaging lens has only the five lenses with diopter. Diopters of the first lens to the fifth lens are positive, negative and positive in sequence. The object side surface of the first lens is a convex surface. The object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface. The image side surface of the third lens is a concave surface. The object side surface of the fourth lens is a concave surface.)

1. An optical imaging lens includes, in order from an object side to an image side along an optical axis, an aperture stop, a first lens element, a second lens element, a third lens element, a fourth lens element, and a fifth lens element, wherein the first lens element to the fifth lens element each include an object side surface facing the object side and allowing passage of imaging light rays, and an image side surface facing the image side and allowing passage of imaging light rays, and the lens elements having diopter only include the five lens elements;

the first lens has positive diopter, and the object side surface of the first lens is a convex surface;

the second lens has negative diopter, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface;

the third lens has negative diopter, and the image side surface of the third lens is a concave surface;

the fourth lens has negative diopter, and the object side surface of the fourth lens is a concave surface; and

the fifth lens has positive diopter.

2. The optical imaging lens of claim 1, wherein the optical imaging lens conforms to: 2.1 ≦ EFL/f1 ≦ 2.4, where EFL is an effective focal length of the optical imaging lens, f1 is a focal length of the first lens, and | EFL/f1| is an absolute value of EFL/f 1.

3. The optical imaging lens of claim 1, wherein the optical imaging lens conforms to: 30-60 of V3, wherein V3 is the Abbe number of the third lens.

4. The optical imaging lens of claim 1, wherein the optical imaging lens conforms to: 1.0 ≦ (R3+ R4)/(R3-R4) ≦ 1.7, where R3 is the radius of curvature of the object-side surface of the second lens and R4 is the radius of curvature of the image-side surface of the second lens.

5. The optical imaging lens of claim 1, wherein the field angle of the optical imaging lens falls within a range of 40 degrees to 50 degrees.

6. The optical imaging lens of claim 1,

the image side surface of the first lens is provided with a convex surface part positioned in an area near an optical axis and a concave surface part positioned in an area near the circumference,

the object side surface of the third lens is a concave surface,

the image side surface of the fourth lens is provided with a concave surface part positioned in an area near an optical axis and a convex surface part positioned in an area near the circumference,

the object-side surface of the fifth lens element is convex, and the image-side surface of the fifth lens element has a concave portion located in an area near an optical axis and a convex portion located in an area near a circumference.

7. The optical imaging lens of claim 1,

the image side surface of the first lens is a concave surface,

the object side surface of the third lens is convex,

the image side surface of the fourth lens is provided with a concave surface part positioned in an area near an optical axis and a convex surface part positioned in an area near the circumference,

the object-side surface of the fifth lens element is convex, and the image-side surface of the fifth lens element is convex.

8. The optical imaging lens of claim 1,

the image side surface of the first lens is a concave surface,

the object side surface of the third lens is convex,

the image side surface of the fourth lens is provided with a concave surface part positioned in an area near an optical axis and a convex surface part positioned in an area near the circumference,

the object-side surface of the fifth lens element is concave, and the image-side surface of the fifth lens element is convex.

9. The optical imaging lens of claim 1,

the image side surface of the first lens is provided with a convex surface part positioned in an area near an optical axis and a concave surface part positioned in an area near the circumference,

the object side surface of the third lens is provided with a concave surface part positioned in an area near an optical axis and a convex surface part positioned in an area near the circumference,

the image side surface of the fourth lens element is convex,

the object-side surface of the fifth lens element is convex, and the image-side surface of the fifth lens element has a concave portion located in an area near an optical axis and a convex portion located in an area near a circumference.

Technical Field

The present invention relates to an optical element, and more particularly, to an optical imaging lens.

Background

In recent years, a camera module has been developed due to popularization of a mobile phone and a digital camera, but a telephoto lens system (tele lens system) generally has a long lens length (TTL) due to a long effective focal length (effective focal length), which is not favorable for thinning of a lens and is difficult to be applied to wearable electronic products. In view of the above problems, it has been an endeavor of those skilled in the art to design an optical imaging lens having a good imaging quality, a short lens length, and a telephoto capability.

Disclosure of Invention

The invention provides an optical imaging lens which has a narrow field angle, a short lens length, good optical quality and long-distance image pickup capability.

An optical imaging lens system according to an embodiment of the present invention includes, in order from an object side to an image side along an optical axis, an aperture stop, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element to the fifth lens element each include an object-side surface facing the object side and passing the imaging light and an image-side surface facing the image side and passing the imaging light, and the lens elements having refractive power are only the five lens elements. The first lens has positive diopter, and the object side surface of the first lens is a convex surface. The second lens has negative diopter, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface. The third lens has negative diopter, and the image side surface of the third lens is a concave surface. The fourth lens has negative diopter, and the object side surface of the fourth lens is a concave surface. And a fifth lens having a positive refractive power.

In an embodiment of the present invention, the optical imaging lens includes: 2.1 ≦ EFL/f1 ≦ 2.4, where EFL is an effective focal length of the optical imaging lens, f1 is a focal length of the first lens, and | EFL/f1| is an absolute value of EFL/f 1.

In an embodiment of the present invention, the optical imaging lens includes: 30-60 of V3, wherein V3 is the Abbe number of the third lens.

In an embodiment of the present invention, the optical imaging lens includes: 1.0 ≦ (R3+ R4)/(R3-R4) ≦ 1.7, where R3 is the radius of curvature of the object-side surface of the second lens, and R4 is the radius of curvature of the image-side surface of the second lens.

In an embodiment of the present invention, the optical imaging lens includes: the field angle of the optical imaging lens falls within a range of 40 degrees to 50 degrees.

In an embodiment of the invention, the image-side surface of the first lens element has a convex surface located in a region near an optical axis and a concave surface located in a region near a circumference. The object side surface of the third lens is a concave surface. The image side surface of the fourth lens is provided with a concave surface part positioned in an area nearby an optical axis and a convex surface part positioned in an area nearby the circumference. The object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is provided with a concave surface part positioned in an area near an optical axis and a convex surface part positioned in an area near the circumference.

In an embodiment of the invention, an image-side surface of the first lens element is concave. The object side surface of the third lens is a convex surface. The image side surface of the fourth lens is provided with a concave surface part positioned in an area nearby an optical axis and a convex surface part positioned in an area nearby the circumference. The object-side surface of the fifth lens element is convex, and the image-side surface of the fifth lens element is convex.

In an embodiment of the invention, an image-side surface of the first lens element is concave. The object side surface of the third lens is a convex surface. The image side surface of the fourth lens is provided with a concave surface part positioned in an area nearby an optical axis and a convex surface part positioned in an area nearby the circumference. The object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface.

In an embodiment of the invention, the image-side surface of the first lens element has a convex surface located in a region near an optical axis and a concave surface located in a region near a circumference. The object side surface of the third lens is provided with a concave surface part positioned in an area near an optical axis and a convex surface part positioned in an area near the circumference. The image side surface of the fourth lens is convex. The object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is provided with a concave surface part positioned in an area near an optical axis and a convex surface part positioned in an area near the circumference.

Based on the above, the optical imaging lens according to the embodiment of the present invention has the following beneficial effects: by the concave-convex shape design and arrangement of the object side surface or the image side surface of the lens and the diopter combination of the lens, the optical imaging lens can achieve the effect of narrow field angle and shorter lens length, and has the advantages of good imaging quality and long-distance shooting.

In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

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

Fig. 2A to 2D are longitudinal spherical aberration diagrams and various aberration diagrams of the first embodiment.

Fig. 3 is a schematic diagram of an optical imaging lens according to a second embodiment of the invention.

Fig. 4A to 4D are longitudinal spherical aberration diagrams and various aberration diagrams of the second embodiment.

Fig. 5 is a schematic diagram of an optical imaging lens according to a third embodiment of the invention.

Fig. 6A to 6D are longitudinal spherical aberration diagrams and various aberration diagrams of the third embodiment.

Fig. 7 is a schematic diagram of an optical imaging lens according to a fourth embodiment of the invention.

Fig. 8A to 8D are longitudinal spherical aberration diagrams and various aberration diagrams of the fourth embodiment.

Wherein, the reference numbers:

0: aperture

1: first lens

2: second lens

3: third lens

4: fourth lens

5: fifth lens element

9: optical filter

11. 21, 31, 41, 51, 91: side of the object

12. 22, 32, 42, 52, 92: image side

122. 124, 222, 224, 312, 314, 322, 324, 412, 414, 422, 512, 514, 522: concave part

111. 113, 121, 211, 213, 311, 313, 421, 423, 511, 513, 521, 523: convex surface part

10: optical imaging lens

100: image plane

I: optical axis

Detailed Description

In the present specification, "a lens has a positive refractive power (or a negative refractive power)" means that the refractive power on the optical axis of the lens calculated by the gaussian optical theory is positive (or negative). In the imaging lens group, each lens is radially symmetrical with each other by taking the optical axis as a symmetry axis. Each lens has an object side surface and an image side surface opposite to the object side surface. The object-side surface and the image-side surface define surfaces of the lens through which imaging light rays pass, wherein the imaging light rays include a chief ray (Chief ray) and a marginal ray (marginalray). The object side surface (or image side surface) has an optical axis vicinity region and a circumference vicinity region connected to and surrounding the optical axis vicinity region. The region near the optical axis is a region on the optical axis through which the imaging light passes. The peripheral vicinity is a region through which the marginal ray passes.

"a region of a surface (an object-side surface or an image-side surface) of the lens near the optical axis (or a region near the circumference thereof) is a convex surface or a concave surface" may be determined on the image side or the object side by an intersection point of a ray (or a ray extension line) passing through the region in parallel with the optical axis (a ray focus determination method). For example, when the light passes through the region, the light is focused toward the image side, and the focal point of the optical axis is located at the image side, the region is a convex surface portion. On the contrary, if the light passes through the certain region, the light diverges, and the extension line and the focal point of the optical axis are on the object side. The determination of the surface shape of the surface in the region near the optical axis can be made according to the determination manner of a person skilled in the art, that is, the determination of the unevenness is made by the positive or negative of the R value (referring to the curvature radius of the paraxial region). Regarding the object side, when the R value is positive, it is determined that the object side is convex in the area near the optical axis, that is, the object side has a convex portion in the area near the optical axis; when the value of R is negative, it is determined that the object side surface has a concave surface in the region near the optical axis, that is, the object side surface has a concave surface portion in the region near the optical axis. Regarding the image side surface, when the R value is positive, it is determined that the image side surface is concave in the region near the optical axis, that is, the image side surface has a concave portion in the region near the optical axis; when the R value is negative, it is determined that the image side surface is convex in the region near the optical axis, that is, the image side surface has a convex portion in the region near the optical axis.

A surface (object side or image side) of the lens may have more than one convex portion, more than one concave portion, or a combination of both. When the surface has a convex surface portion and a concave surface portion, the surface has an inflection point. The inflection point is the transition point between the convex surface portion and the concave surface portion. That is, the surface is concave by convex, or convex by concave at points of reverse curvature. On the other hand, when the surface has only a convex surface portion or only a concave surface portion, the surface does not have an inflection point.

Referring to fig. 1, an optical imaging lens 10 according to the first embodiment of the present invention includes, in order from an object side to an image side along an optical axis I, an aperture stop 0, a first lens element 1, a second lens element 2, a third lens element 3, a fourth lens element 4, a fifth lens element 5 and a filter 9. The object side is a side facing an object to be photographed, and the Image side is a side facing an Image Plane (Image Plane) 100. After entering the optical imaging lens 10, light emitted from an object to be photographed passes through the aperture 0, the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5 and the optical filter 9 in sequence, and then forms an image on the imaging surface 100. The filter 9 is, for example, an infrared cut filter (ir filter) for preventing infrared rays in a partial band of light from being transmitted to the image plane 100 to affect the image quality, but the invention is not limited thereto.

The first lens element 1, the second lens element 2, the third lens element 3, the fourth lens element 4, the fifth lens element 5, and the filter 9 each include an object- side surface 11, 21, 31, 41, 51, 91 facing the object side and through which the imaging light passes, and an image- side surface 12, 22, 32, 42, 52, 92 facing the image side and through which the imaging light passes.

The aperture 0 is placed in front of the first lens 1.

The first lens 1 has a positive refractive power. The object-side surface 11 of the first lens element 1 is convex, and has a convex portion 111 located in the vicinity of the optical axis and a convex portion 113 located in the vicinity of the circumference. The image-side surface 12 of the first lens element 1 has a convex portion 121 located in the vicinity of the optical axis and a concave portion 124 located in the vicinity of the circumference.

The second lens 2 has a negative refractive power. The object-side surface 21 of the second lens element 2 is convex, and has a convex surface 211 located in the vicinity of the optical axis and a convex surface 213 located in the vicinity of the circumference. The image-side surface 22 of the second lens element 2 is concave and has a concave portion 222 located in the vicinity of the optical axis and a concave portion 224 located in the vicinity of the circumference.

The third lens 3 has a negative refractive power. The object-side surface 31 of the third lens element 3 is concave, and has a concave portion 312 located in the vicinity of the optical axis and a convex portion 314 located in the vicinity of the circumference. The image-side surface 32 of the third lens element 3 is concave, and has a concave portion 322 located in the vicinity of the optical axis and a concave portion 324 located in the vicinity of the circumference.

The fourth lens 4 has a negative refractive power. The object side surface 41 of the fourth lens element 4 is concave, and has a concave portion 412 located in the vicinity of the optical axis and a concave portion 414 located in the vicinity of the circumference. The image-side surface 42 of the fourth lens element 4 has a concave portion 422 located in the vicinity of the optical axis and a convex portion 423 located in the vicinity of the circumference.

The fifth lens 5 has a positive refractive power. The object-side surface 51 of the fifth lens element 5 is convex, and has a convex portion 511 located in the vicinity of the optical axis and a convex portion 513 located in the vicinity of the circumference. The image-side surface 52 of the fifth lens element 5 has a concave portion 522 located in the vicinity of the optical axis and a convex portion 523 located in the vicinity of the circumference.

In the optical imaging lens 10 of the present embodiment, only the above five lenses having refractive powers are provided. In addition, in the embodiment, the first lens element 1 to the fifth lens element 5 may be made of plastic material to satisfy the requirement of light weight, but not limited thereto. In another example, the first lens element 1 to the fifth lens element 5 may be made of glass. In another example, at least one of the first lens 1 to the fifth lens 5 may be made of a glass material, and the remaining lenses may be made of a plastic material.

Other detailed optical data for the first embodiment are shown in table one. In table I, the aperture stop 0 corresponds to a distance (mm) of-0.5485 mm, where 0.5485 indicates that the distance between the object-side surface 11 of the first lens element and the intersection point of the plane where the aperture stop 0 is located and the optical axis I is 0.5485mm, and the minus sign represents the direction from the image side to the object side. A distance (mm) between the object-side surface 11 of the first lens element 1 and the image-side surface 12 of the first lens element 1 is 0.881mm, which means that the distance between the object-side surface 11 of the first lens element 1 and the image-side surface 12 of the first lens element 1 on the optical axis I (i.e. the thickness of the first lens element 1 on the optical axis I) is 0.881 mm. A distance (mm) between the image-side surface 12 of the first lens element 1 and the object-side surface 21 of the second lens element 2 of 0.109mm represents a distance between the image-side surface 12 of the first lens element 1 and the object-side surface 21 of the second lens element 1 of 0.109mm on the optical axis I. The other fields of the pitch (mm) can be analogized and will not be repeated below.

Watch 1

In the present embodiment, the object- side surfaces 11, 21, 31, 41, 51 and the image- side surfaces 12, 22, 32, 42, 52 of the first lens element 1, the second lens element 2, the third lens element 3, the fourth lens element 4 and the fifth lens element 5 are all aspheric surfaces, and these aspheric surfaces are defined by the following formula (1):

in the formula (1), Y is a distance between a point on the aspherical surface curve and the optical axis I. Z is the depth of the aspheric surface. R is the radius of curvature of the lens surface near the optical axis I. K is the cone constant (conc constant). A. the_iAre the i-th order aspheric coefficients.

The aspheric coefficients of the object-side surface 11 of the first lens 1 to the image-side surface 52 of the fifth lens 5 in formula (1) are shown in table two. In the second table, the column number 11 indicates that it is the aspheric coefficient of the object-side surface 11 of the first lens element 1, and so on.

Surface of	K	A4	A6	A8
					11	8.5843E-02	-9.9038E-03	5.1635E-03	-2.3862E-02
12	9.5220E+01	-2.8757E-02	1.0624E-01	-1.0462E-01
					21	-9.8989E+01	-8.9577E-02	2.8914E-01	-3.4007E-01
22	7.3280E+00	-8.8900E-02	2.3791E-01	-2.3545E-01
					31	6.0092E+01	-1.4365E-01	5.2390E-02	4.7025E-01
32	9.8963E+01	-1.0149E-01	8.8417E-02	2.7817E-01
					41	3.3401E+01	-3.0390E-02	-3.6578E-01	3.5036E-01
42	-8.6240E-01	-9.4141E-02	-1.6662E-01	1.8043E-01
					51	-5.0652E+01	-2.4523E-01	2.6567E-01	-1.2469E-01
52	-8.3709E+01	-2.2158E-01	1.5859E-01	-4.5159E-02
					Noodle	A10	A12	A14	A16
11	2.2098E-02	-1.1020E-02	0.0000E+00	0.0000E+00
					12	5.6575E-02	-1.0202E-02	0.0000E+00	0.0000E+00
21	2.4693E-01	-8.0924E-02	0.0000E+00	0.0000E+00
					22	1.6830E-01	-1.9189E-02	0.0000E+00	0.0000E+00
31	-8.0872E-01	4.1220E-01	0.0000E+00	0.0000E+00
					32	-3.5107E-01	1.0569E-01	0.0000E+00	0.0000E+00
41	-8.5553E-02	-1.4521E-02	0.0000E+00	0.0000E+00
					42	-7.3075E-02	8.8984E-03	0.0000E+00	0.0000E+00
51	2.7927E-02	-2.3991E-03	0.0000E+00	0.0000E+00
					52	4.9002E-03	-5.1578E-05	0.0000E+00	0.0000E+00

Watch two

The relationship between the important parameters in the optical imaging lens 10 of the first embodiment is shown in table three.

Effective Focal Length (EFL)	5.44 mm (mm)
		Half field angle (HFOV)	20.5 degree
Lens full length (TTL)	4.882 mm (mm)
		Aperture value (f-number)	2.54
|EFL/f1|	2.30
		V3	30.76
(R3+R4)/(R3-R4)	1.03

Watch III

The optical imaging lens 10 of the first embodiment has an Effective Focal Length (EFL) of 5.44 mm. The Half field Angle (HFOV) is 20.5 degrees. Total Track Length (TTL) is a distance on the optical axis I from the object side surface 11 of the first lens element 1 to the image forming surface 100, and is 4.882 mm. The aperture value (f-number) was 2.54. I EFL/f1| is 0.88, where f1 is the focal length of the first lens 1, | EFL/f1| is the absolute value of EFL/f 1. V3 is 30.76, which is the abbe number of the third lens 3. (R3+ R4)/(R3-R4) is 1.03, where R3 is the radius of curvature of the object-side surface 21 of the second lens 2 and R4 is the radius of curvature of the image-side surface 22 of the second lens 2.

Referring to fig. 2A to 2D, the diagram of fig. 2A illustrates the Longitudinal Spherical Aberration (Longitudinal Spherical Aberration) of the first embodiment at the imaging plane 100 when the wavelengths 656 nm, 587 nm and 486 nm. Fig. 2B and fig. 2C are diagrams illustrating Field Curvature (Field Curvature) aberration in Sagittal (Sagittal) direction and Field Curvature aberration in Tangential (Tangential) direction of the first embodiment at a wavelength of 587 nm on the imaging plane 100, respectively. The diagram of fig. 2D illustrates the Distortion Aberration (Aberration) on the imaging plane 100 when the wavelength is 587 nm in the first embodiment.

Referring to fig. 2A again, the curves formed by each wavelength are very close and close to the middle, which shows that the off-axis light beams with different heights of each wavelength are all concentrated near the imaging point, and the deviation of the imaging point of the off-axis light beams with different heights is controlled within the range of ± 0.025 mm as can be seen from the deviation of the curve of each wavelength, so that the spherical aberration of the same wavelength is obviously improved in the first embodiment.

In the two field curvature aberration diagrams of fig. 2B and fig. 2C, the variation of the focal length of 587 nm wavelength over the entire field of view is within ± 0.025 mm, which illustrates that the first embodiment can effectively eliminate the aberration. The distortion aberration diagram of fig. 2D shows that the distortion aberration of the first embodiment is maintained within a range of ± 3.0%, which indicates that the distortion aberration of the first embodiment meets the requirement of the optical system for image quality, and thus the first embodiment can provide good image quality under the condition that the total lens length is shortened to about 4.882 mm compared with the conventional optical lens.

Fig. 3 is a schematic diagram of an optical imaging lens according to a second embodiment of the invention. Fig. 4A to 4D are longitudinal spherical aberration diagrams and various aberration diagrams of the second embodiment. Referring to fig. 2, a second embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the difference between the two embodiments is as follows: the optical data, aspherical coefficients and parameters between these lenses 1, 2, 3, 4 and 5 are more or less different. The image-side surface 12 of the first lens element 1 is concave, and has a concave portion 122 located in the vicinity of the optical axis and a concave portion 124 located in the vicinity of the circumference. The object-side surface 31 of the third lens element 3 is convex, and has a convex portion 311 located in the vicinity of the optical axis and a convex portion 313 located in the vicinity of the circumference. The image-side surface 52 of the fifth lens element 5 is convex, and has a convex portion 521 located in the vicinity of the optical axis and a convex portion 523 located in the vicinity of the circumference. Note here that, in order to clearly show the drawing, reference numerals of the optical axis vicinity region and the circumference vicinity region, which are similar to the irregularities of the first embodiment, are omitted in fig. 3.

Other detailed optical data for the second embodiment are shown in table four below. The aspheric coefficients of the terms in equation (1) for the object-side surface 11 of the first lens 1 to the image-side surface 52 of the fifth lens 5 of the second embodiment are shown in table five:

watch four

Surface of	K	A4	A6	A8
					11	8.6773E-02	-1.1489E-02	4.6750E-05	-1.8247E-02
12	9.9000E+01	-8.7576E-02	1.8484E-01	-1.6654E-01
					21	3.4761E+01	-1.6817E-01	5.2234E-01	-6.1924E-01
22	6.5584E+00	-1.1148E-01	5.7409E-01	-5.1204E-01
					31	9.9000E+01	5.5267E-02	2.2327E-01	1.0688E-01
32	7.6236E+01	9.4978E-02	6.7110E-02	3.8247E-02
					41	3.8327E+00	-2.3337E-02	-4.8727E-01	7.0390E-01
42	6.8017E+00	-1.3013E-01	-1.8050E-01	2.7788E-01
					51	-9.9000E+01	-2.4634E-01	3.2926E-01	-2.0598E-01
52	-7.8057E+01	-1.8472E-01	1.9052E-01	-9.8002E-02
					Noodle	A10	A12	A14	A16
11	1.5568E-02	-9.2011E-03	0.0000E+00	0.0000E+00
					12	7.6978E-02	-1.1080E-02	0.0000E+00	0.0000E+00
21	4.0503E-01	-1.2393E-01	0.0000E+00	0.0000E+00
					22	4.4488E-01	1.2714E-02	0.0000E+00	0.0000E+00
31	-4.2923E-01	4.7986E-01	0.0000E+00	0.0000E+00
					32	-2.3492E-01	1.6053E-01	0.0000E+00	0.0000E+00
41	-7.0561E-01	4.4638E-01	-1.2582E-01	0.0000E+00
					42	-1.8785E-01	6.6257E-02	-1.0452E-02	0.0000E+00
51	7.3148E-02	-1.4256E-02	1.1691E-03	0.0000E+00
					52	3.0353E-02	-5.3926E-03	4.0621E-04	0.0000E+00

Watch five

The relationship between the important parameters in the optical imaging lens 10 of the second embodiment is shown in table six.

Effective Focal Length (EFL)	5.43 mm (mm)
		Half field angle (HFOV)	23.0 degree
Lens full length (TTL)	4.884 mm (mm)
		Aperture value (f-number)	2.57
|EFL/f1|	2.13
		V3	56.09
(R3+R4)/(R3-R4)	1.58

Watch six

In the diagram of fig. 4A, the deviation of the imaging points of the off-axis light rays with different heights is controlled within ± 0.05 mm. In the two graphs of field curvature aberration of fig. 4B and 4C, the variation of focal length of three representative wavelengths in the entire field of view is within ± 0.025 mm. The distortion aberration diagram of FIG. 4D shows that the distortion aberration of the second embodiment is maintained within a range of + -3.0%. Accordingly, the optical imaging lens 10 of the second embodiment has good optical imaging quality under the condition that the total lens length is shortened to about 4.884 mm.

Fig. 5 is a schematic diagram of an optical imaging lens according to a third embodiment of the invention. Fig. 6A to 6D are longitudinal spherical aberration diagrams and various aberration diagrams of the third embodiment. Referring to fig. 5, a third embodiment of the optical imaging lens system 10 of the present invention is substantially similar to the first embodiment, and the difference between the two embodiments is as follows: the optical data, aspherical coefficients and parameters between these lenses 1, 2, 3, 4 and 5 are more or less different. The image-side surface 12 of the first lens element 1 is concave, and has a concave portion 122 located in the vicinity of the optical axis and a concave portion 124 located in the vicinity of the circumference. The object-side surface 31 of the third lens element 3 is convex, and has a convex portion 311 located in the vicinity of the optical axis and a convex portion 313 located in the vicinity of the circumference. The object side surface 51 of the fifth lens element 5 is concave, and has a concave portion 512 located in the vicinity of the optical axis and a concave portion 514 located in the vicinity of the circumference. The image-side surface 52 of the fifth lens element 5 is convex, and has a convex portion 521 located in the vicinity of the optical axis and a convex portion 523 located in the vicinity of the circumference. Note here that, in order to clearly show the drawing, reference numerals of the optical axis vicinity region and the circumference vicinity region, which are similar to the irregularities of the first embodiment, are omitted in fig. 5.

Other detailed optical data of the third embodiment are shown in table seven below. Each aspheric coefficient of the object side surface 11 of the first lens 1 to the image side surface 52 of the fifth lens 5 in the formula (1) of the third embodiment is as shown in table eight.

Watch seven

Table eight

The relationship between the important parameters in the optical imaging lens 10 of the third embodiment is shown in table nine.

Effective Focal Length (EFL)	5.50 mm (mm)
		Half field angle (HFOV)	21.5 degree
Lens full length (TTL)	4.900 mm (mm)
		Aperture value (f-number)	2.28
|EFL/f1|	2.20
		V3	55.99
(R3+R4)/(R3-R4)	1.67

Watch nine

In the diagram of fig. 6A, the deviation of the imaging points of the off-axis light rays with different heights is controlled within ± 0.04 mm. In the two graphs of field curvature aberration of fig. 6B and 6C, the variation of focal length of three representative wavelengths in the entire field of view is within ± 0.025 mm. The distortion aberration diagram of FIG. 6D shows that the distortion aberration of the third embodiment is maintained within a range of + -3.0%. Accordingly, the optical imaging lens 10 of the third embodiment has good optical imaging quality under the condition that the total lens length is shortened to about 4.900 mm.

Fig. 7 is a schematic diagram of an optical imaging lens according to a fourth embodiment of the invention. Fig. 8A to 8D are longitudinal spherical aberration diagrams and various aberration diagrams of the fourth embodiment. Referring to fig. 7, a fourth embodiment of an optical imaging lens system 10 according to the present invention is substantially similar to the first embodiment, and the difference between the two embodiments is as follows: the optical data, aspherical coefficients and parameters between these lenses 1, 2, 3, 4 and 5 are more or less different. In addition, the object side surface 31 of the third lens element 3 has a convex surface portion 313 located in a circumferential vicinity. The image-side surface 42 of the fourth lens element 4 is convex, and has a convex portion 421 located in the vicinity of the optical axis and a convex portion 423 located in the vicinity of the circumference. Note here that, in order to clearly show the drawing, reference numerals of the optical axis vicinity region and the circumference vicinity region, which are similar to the irregularities of the first embodiment, are omitted in fig. 7.

Other detailed optical data of the fourth embodiment are shown in the following table ten. The aspheric coefficients of the terms in equation (1) for the object-side surface 11 of the first lens 1 to the image-side surface 52 of the fifth lens 5 of the fourth embodiment are shown in table eleven.

Watch ten

Watch eleven

The relationship between the important parameters in the optical imaging lens 10 of the fourth embodiment is shown in table twelve.

Effective Focal Length (EFL)	5.47 mm (mm)
		Half field angle (HFOV)	20.0 degree
Lens full length (TTL)	4.900 mm (mm)
		Aperture value (f-number)	2.78
|EFL/f1|	2.35
		V3	55.99
(R3+R4)/(R3-R4)	1.20

Watch twelve

In the diagram of fig. 8A, the deviation of the imaging points of the off-axis light rays with different heights is controlled within ± 0.025 mm. In the two graphs of field curvature aberration of fig. 8B and 8C, the variation of focal length of the three representative wavelengths in the entire field of view is within ± 0.025 mm. The distortion aberration diagram of FIG. 8D shows that the distortion aberration of the fourth embodiment is maintained within a range of + -3.0%. Accordingly, the optical imaging lens 10 of the fourth embodiment has good optical imaging quality under the condition that the total lens length is shortened to about 4.900 mm.

In addition, in view of the unpredictability of the optical system design, under the framework of the present invention, at least one of the following conditional expressions is satisfied to preferably improve the imaging quality of the system and to improve the drawbacks of the prior art.

In the above-described embodiment, the optical imaging lens 10 satisfies the following conditions: the absolute value of EFL/f1 is EFL/f1, and the absolute value of EFL/f1 is more than or equal to 2.1 and less than or equal to 2.4. If the | EFL/f1| is lower than the lower limit of 2.1, the influence of the refractive power of the first lens element 1 on the whole optical imaging lens system 10 is small, which is not favorable for shortening the lens length. If the EFL/f1 is higher than the upper limit of 2.4, the effect of the refractive power of the first lens element 1 on the whole optical imaging lens system 10 is increased, which leads to the problem of tolerance sensitivity. If the | EFL/f1| is within the above range, the optical imaging lens 10 can avoid the above problem.

In the above-described embodiment, the optical imaging lens 10 satisfies the following conditions: v3 is more than or equal to 30 and less than or equal to 60. Within this range, the third lens 3 can effectively reduce chromatic aberration.

In the above-described embodiment, the optical imaging lens 10 satisfies the following conditions: 1.0-1.7 of (R3+ R4)/(R3-R4). Within this range, the lens length can be effectively shortened and the optical resolution performance can be maintained.

In the above-described embodiment, the optical imaging lens 10 satisfies the following conditions: the optical imaging lens 10 has a field angle ranging from 40 degrees to 50 degrees, which has advantages of a narrow field angle and telephoto imaging.

In summary, the optical imaging lens according to the embodiment of the present invention has the following beneficial effects: by the concave-convex shape design and arrangement of the object side surface or the image side surface of the lens and the diopter combination of the lens, the optical imaging lens can achieve the effect of narrow field angle and shorter lens length, and has the advantages of good imaging quality and long-distance shooting.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.