CN103777329B - Optical imaging lens and apply the electronic installation of this optical imaging lens - Google Patents
Optical imaging lens and apply the electronic installation of this optical imaging lens Download PDFInfo
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- CN103777329B CN103777329B CN201310528305.5A CN201310528305A CN103777329B CN 103777329 B CN103777329 B CN 103777329B CN 201310528305 A CN201310528305 A CN 201310528305A CN 103777329 B CN103777329 B CN 103777329B
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Abstract
The present invention relates to a kind of optical imaging lens and apply the electronic installation of this optical imaging lens. This optical imaging lens is from thing side to sequentially comprising six lens as side. The thing side of first lens has one and is positioned at the convex surface part of optical axis near zone and this and has a concave surface portion that is positioned at optical axis near zone as side; The thing side of the second lens has a convex surface part that is positioned at optical axis near zone; The thing side of the 3rd lens has a convex surface part that is positioned at optical axis near zone; The thing side of the 5th lens has a convex surface part that is positioned at circumference near zone, and has a convex surface part that is positioned at optical axis near zone as side; The 6th lens there is a concave surface portion that is positioned at optical axis near zone as side, electronic installation of the present invention, comprises a casing; And an image module, above-mentioned optical imaging lens; One lens barrel, arranges optical imaging lens to supply with; One module back seat unit; An and image sensor. The present invention can produce by described lens match and promote image quality and microminiaturized advantage.
Description
Technical Field
The present invention relates to an optical lens, and more particularly, to an optical imaging lens and an electronic device using the same.
Background
In recent years, the popularity of portable electronic products such as mobile phones and digital cameras has led to the rapid development of image module related technologies, the image module mainly includes components such as an optical imaging lens, a module backseat unit (modular) and a sensor (sensor), and the miniaturization of the image module is becoming more and more demanding due to the trend of the mobile phones and digital cameras toward being thin and light, and with the technological progress and size reduction of a photosensitive coupled device (CCD) or a complementary metal-oxide semiconductor (CMOS), the optical imaging lens loaded in the image module needs to be correspondingly shortened in length, but in order to avoid the reduction of the photographing effect and quality, good optical performance is still considered when the length of the optical imaging lens is shortened.
U.S. Pat. No. 7,580,205 discloses a wide-angle optical lens consisting of six lenses, which has a lens length as long as 2 cm, so that the lens with too large size cannot be applied to electronic devices that are required to be light, thin, small and often only 1 to 2 cm thin.
Therefore, it is an urgent issue to solve in the art how to effectively reduce the system length of the optical lens while maintaining sufficient optical performance.
Disclosure of Invention
Therefore, the present invention is directed to an optical imaging lens capable of maintaining good optical performance even when the length of the lens system is shortened.
The optical imaging lens of the present invention sequentially includes, along an optical axis from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element, where the first lens element to the sixth lens element have refractive indexes, and include an object-side surface facing the object side and allowing the imaging light to pass therethrough, and an image-side surface facing the image side and allowing the imaging light to pass therethrough.
The object side surface of the first lens is provided with a convex surface part positioned in an area near an optical axis, and the image side surface of the first lens is provided with a concave surface part positioned in an area near the optical axis; the object side surface of the second lens is provided with a convex surface part positioned in an area near an optical axis; the object side surface of the third lens is provided with a convex surface part positioned in an area near an optical axis; the object side surface of the fifth lens is provided with a convex surface part positioned in an area near the circumference, and the image side surface of the fifth lens is provided with a convex surface part positioned in an area near the optical axis; the image side surface of the sixth lens element has a concave surface portion located in a region near an optical axis, and the sixth lens element is made of plastic.
The optical imaging lens has only six lenses with refractive indexes.
The optical imaging lens has the beneficial effects that: the object side surface of the first lens is provided with a convex surface part in an area near an optical axis, and the image side surface is provided with a concave surface part in the area near the optical axis, so that the optical imaging lens is facilitated to condense light. In addition, the object side surface of the second lens has a convex surface portion located in an area near an optical axis, the object side surface of the third lens has a convex surface portion located in an area near the optical axis, the object side surface of the fifth lens has a convex surface portion located in an area near the circumference, the image side surface has a convex surface portion located in an area near the optical axis, and the image side surface of the sixth lens has a concave surface portion located in an area near the optical axis, so that aberration correction is facilitated, and imaging quality of the optical imaging lens is ensured.
Therefore, another objective of the present invention is to provide an electronic device applied to the optical imaging lens.
Therefore, the electronic device of the invention comprises a casing and an image module arranged in the casing.
The image module includes an optical imaging lens, a lens barrel for the optical imaging lens, a module rear seat unit for the lens barrel, and an image sensor disposed at an image side of the optical imaging lens.
The electronic device has the beneficial effects that: by loading the image module with the optical imaging lens in the electronic device, the imaging lens can still provide the advantage of good optical performance under the condition of shortening the system length, and a thinner and lighter electronic device can be manufactured under the condition of not sacrificing the optical performance, so that the invention has good practical performance, is beneficial to the structural design of thinning and shortening, and can meet the consumption requirement of higher quality.
Drawings
FIG. 1 is a schematic diagram illustrating a lens structure;
FIG. 2 is a schematic configuration diagram illustrating a first preferred embodiment of an optical imaging lens according to the present invention;
FIG. 3 is a diagram of longitudinal spherical aberration and various aberrations of the first preferred embodiment;
FIG. 4 is a table illustrating the optical data for each lens of the first preferred embodiment;
FIG. 5 is a table diagram illustrating aspheric coefficients of the lenses of the first preferred embodiment;
FIG. 6 is a schematic configuration diagram illustrating a second preferred embodiment of an optical imaging lens according to the invention;
FIG. 7 is a diagram of longitudinal spherical aberration and various aberrations of the second preferred embodiment;
FIG. 8 is a table illustrating the optical data for each lens of the second preferred embodiment;
FIG. 9 is a table diagram illustrating aspheric coefficients of the lenses of the second preferred embodiment;
FIG. 10 is a schematic configuration diagram illustrating a third preferred embodiment of an optical imaging lens according to the invention;
FIG. 11 is a longitudinal spherical aberration and aberration diagrams of the third preferred embodiment;
FIG. 12 is a table illustrating the optical data for each lens of the third preferred embodiment;
FIG. 13 is a table diagram illustrating aspheric coefficients of the lenses of the third preferred embodiment;
FIG. 14 is a schematic configuration diagram illustrating a fourth preferred embodiment of an optical imaging lens system according to the invention;
FIG. 15 is a longitudinal spherical aberration and aberration diagrams of the fourth preferred embodiment;
FIG. 16 is a table illustrating the optical data for each lens of the fourth preferred embodiment;
FIG. 17 is a table diagram illustrating aspheric coefficients of the lenses of the fourth preferred embodiment;
FIG. 18 is a schematic configuration diagram illustrating a fifth preferred embodiment of an optical imaging lens according to the invention;
FIG. 19 is a longitudinal spherical aberration and aberration diagrams of the fifth preferred embodiment;
FIG. 20 is a table illustrating the optical data for each lens of the fifth preferred embodiment;
FIG. 21 is a table diagram illustrating aspheric coefficients of the lenses of the fifth preferred embodiment;
FIG. 22 is a schematic configuration diagram illustrating a sixth preferred embodiment of an optical imaging lens according to the invention;
FIG. 23 is a longitudinal spherical aberration and aberration diagrams of the sixth preferred embodiment;
FIG. 24 is a table diagram illustrating the optical data for each lens of the sixth preferred embodiment;
FIG. 25 is a table diagram illustrating aspherical coefficients of the lenses of the sixth preferred embodiment;
FIG. 26 is a schematic configuration diagram illustrating a seventh preferred embodiment of an optical imaging lens system according to the invention;
FIG. 27 is a longitudinal spherical aberration and aberration diagrams of the seventh preferred embodiment;
FIG. 28 is a table illustrating the optical data for each lens of the seventh preferred embodiment;
FIG. 29 is a table diagram illustrating aspherical coefficients of the lenses of the seventh preferred embodiment;
FIG. 30 is a schematic configuration diagram illustrating an eighth preferred embodiment of an optical imaging lens system according to the invention;
FIG. 31 is a longitudinal spherical aberration and aberration diagrams of the eighth preferred embodiment;
FIG. 32 is a table illustrating the optical data for each lens of the eighth preferred embodiment;
FIG. 33 is a table diagram illustrating aspheric coefficients of the lenses of the eighth preferred embodiment;
fig. 34 is a table diagram illustrating optical parameters of the first preferred embodiment to the eighth preferred embodiment of the six-piece optical imaging lens;
FIG. 35 is a schematic cross-sectional view illustrating a first preferred embodiment of an electronic device according to the invention; and
FIG. 36 is a schematic cross-sectional view illustrating an electronic device according to a second preferred embodiment of the invention.
[ notation ] to show
10 optical imaging lens
2 aperture
3 first lens
31 side of the object
311 convex part
32 image side
321 concave part
4 second lens
41 side of the object
411 convex part 42 image side
421 concave part
422 concave part
423 convex surface part
424 convex surface part
425 convex part
5 third lens
51 side of the object
511 convex part
Side surface of 52 figure
521 convex part
522 concave part
6 fourth lens
61 side of the object
611 convex surface
612 concave part
62 image side
621 concave part
622 convex part
7 fifth lens
71 side of the object
711 convex part
72 image side
721 convex part
722 concave part
8 sixth lens
Side of 81 items
811 convex part
812 concave part
Side of 82 figure
821 concave part
822 convex part
9 optical filter
91 side of the object
Side surface 92
100 image plane
I optical axis
1 electronic device
11 casing
12 image module
120 module backseat unit
121 lens backseat
122 image sensor backseat
123 first base
124 second seat
125 coil
126 magnetic assembly
130 image sensor
21 lens barrel
II, III axes
Detailed Description
The invention will now be further described with reference to the accompanying drawings and detailed description.
Before the present invention is described in detail, it should be noted that in the following description, similar components are denoted by the same reference numerals.
In the present specification, the phrase "a lens has positive refractive index (or negative refractive index)" means that the lens has positive refractive index (or negative refractive index) in the region near the optical axis. "the object side surface (or image side surface) of a lens has a convex surface portion (or concave surface portion) in a region" means that the region is more "outwardly convex" (or "inwardly concave") in a direction parallel to the optical axis than an outer region immediately radially adjacent to the region, taking fig. 1 as an example, where I is the optical axis and such a lens is radially symmetrical to each other with the optical axis I as a symmetry axis, the object side surface of the lens has a convex surface portion in a region a, a concave surface portion in a region B and a convex surface portion in a region C, because a region a is more outwardly convex in a direction parallel to the optical axis than an outer region immediately radially adjacent to the region (i.e., region B), a region B is more inwardly concave than a region C, and a region C is also more outwardly convex than a region E. The "area around the circumference" refers to the area around the circumference of the curved surface on the lens for passing only the imaging light, i.e. the area C in the figure, wherein the imaging light includes the chief ray (chiefly) Lc and the marginal ray (marginally) Lm. The "optical axis vicinity region" refers to the optical axis vicinity region of the curved surface through which only the imaging light passes, i.e., region a in fig. 1. In addition, the lens further includes an extension portion E for assembling the lens in an optical imaging lens, and an ideal imaging light does not pass through the extension portion E, but the structure and shape of the extension portion E are not limited thereto.
Referring to fig. 2 and 4, the optical imaging lens 10 according to the first preferred embodiment of the present invention includes, in order from an object side to an image side along an optical axis I, a first lens element 3, a second lens element 4, a third lens element 5, an aperture stop 2, a fourth lens element 6, a fifth lens element 7, a sixth lens element 8, and a filter 9. When light emitted from an object enters the optical imaging lens 10 and passes through the first lens element 3, the second lens element 4, the third lens element 5, the stop 2, the fourth lens element 6, the fifth lens element 7, the sixth lens element 8, and the filter 9, an image is formed on an imaging surface 100(image plane). The filter 9 is an infrared filter (IRCutFilter) for preventing infrared rays in light from transmitting to the image plane 100 to affect the image quality. It should be noted that the object side is toward the object to be photographed, and the image side is toward the imaging plane 100.
The first lens element 3, the second lens element 4, the third lens element 5, the fourth lens element 6, the fifth lens element 7, the sixth lens element 8, and the filter 9 each have an object-side surface 31, 41, 51, 61, 71, 81, 91 facing the object side and allowing the imaging light to pass therethrough, and an image-side surface 32, 42, 52, 62, 72, 82, 92 facing the image side and allowing the imaging light to pass therethrough.
In addition, in order to satisfy the requirement of light weight of the product, the second lens element 4 to the sixth lens element 8 are made of plastic material with refractive index, but the material is not limited thereto.
The first lens element 3 has a negative refractive index and is made of glass. The object-side surface 31 of the first lens element 3 is convex and spherical, and has a convex portion 311 located in the vicinity of the optical axis I, and the image-side surface 32 of the first lens element 3 is concave and spherical, and has a concave portion 321 located in the vicinity of the optical axis I.
The second lens element 4 has a positive refractive index. The object-side surface 41 of the second lens element 4 is aspheric and convex, and the image-side surface 42 of the second lens element 4 is aspheric and has a concave portion 421 in the vicinity of the optical axis, a concave portion 422 in the vicinity of the circumference, and a convex portion 423 between the vicinity of the optical axis and the vicinity of the circumference.
The third lens element 5 with positive refractive index has a convex object-side surface 51 of the third lens element 5 being aspheric and having a convex surface 511 located near the optical axis I, and the image-side surface 52 of the third lens element 5 being convex and aspheric.
The fourth lens element 6 is a lens element with negative refractive index. The object-side surface 61 of the fourth lens element 6 is aspheric and has a convex surface 611 located in the vicinity of the optical axis I and a concave surface 612 located in the vicinity of the circumference, and the image-side surface 62 of the fourth lens element 6 is aspheric and has a concave surface 621 located in the vicinity of the optical axis I and a convex surface 622 located in the vicinity of the circumference.
The fifth lens element 7 has a positive refractive index. The object-side surface 71 of the fifth lens element 7 is convex and aspheric and has a convex portion 711 in the vicinity of the circumference, and the image-side surface 72 of the fifth lens element 7 is convex and aspheric and has a convex portion 721 in the vicinity of the optical axis I.
The sixth lens element 8 is a lens element with negative refractive index. The object-side surface 81 of the sixth lens element 8 is aspheric and has a convex portion 811 in the vicinity of the optical axis I and a concave portion 812 in the vicinity of the circumference, and the image-side surface 82 of the sixth lens element 8 is aspheric and has a concave portion 821 in the vicinity of the optical axis I and a convex portion 822 in the vicinity of the circumference.
In the first preferred embodiment, only the first lens element to the sixth lens element have refractive indexes.
Other detailed optical data of the first preferred embodiment is shown in fig. 4, and the overall system focal length (EFL) of the first preferred embodiment is 1.456mm, half view (HFOV) is 60.0 °, aperture value (Fno) is 2.60, and the system length is 12.31 mm. The system length is a distance from the object side surface 31 of the first lens element 3 to an image plane 100 on an optical axis I.
In addition, a total of ten surfaces of the object-side surface 41, 51, 61, 71, 81 and the image-side surface 42, 52, 62, 72, 82 of the second lens element 4, the third lens element 5, the fourth lens element 6, the fifth lens element 7, and the sixth lens element 8 are aspheric surfaces defined by the following formulas:
wherein:
y: the distance between a point on the aspheric curve and the optical axis I;
z: the depth of the aspheric surface (the vertical distance between the point on the aspheric surface that is Y from the optical axis I and the tangent plane tangent to the vertex on the optical axis I);
r is the curvature radius of the lens surface;
k: cone coefficient (Conicconstant);
a2i: aspheric coefficients of order 2 i.
The aspheric coefficients of the object side surface 41 of the second lens element 4 to the image side surface 82 of the sixth lens element 8 in equation (1) are shown in fig. 5.
In addition, the relationship between the important parameters in the optical imaging lens 10 of the first preferred embodiment is as follows:
G12=1.56；T2=2.14；G23=0.66；T3=2.12；
G34=0.63；T4=0.34；T5=1.94；T6=0.30；
ALT=7.54；Gaa=2.94；EFL=1.46；
ALT/T2=3.53；
Gaa/T6=9.80；
G23/T3=0.31；
Gaa/T4=8.67；
G23/T4=1.95；
Gaa/T3=1.39；
EFL/G34=2.30；
G23/G34=1.04；
ALT/G12=4.84；
ALT/G23=11.42；
T6/T2=0.14；
EFL/T4=4.29；
G23/T6=2.20；
ALT/EFL = 5.18; and
T5/T4=5.72。
wherein,
t2 is the thickness of the second lens 4 on the optical axis I;
t3 is the thickness of the third lens 5 on the optical axis I;
t4 is the thickness of the fourth lens 6 on the optical axis I;
t5 is the thickness of the fifth lens 7 on the optical axis I;
t6 is the thickness of the sixth lens 8 on the optical axis I;
g12 is an air gap on the optical axis I from the first lens 3 to the second lens 4;
g23 is an air gap on the optical axis I between the second lens 4 and the third lens 5;
g34 is an air gap on the optical axis I of the third lens 5 to the fourth lens 6;
gaa is a sum of five air gaps on the optical axis I of the first lens element 3 to the sixth lens element 8;
ALT is a sum of thicknesses of the first lens element 3, the second lens element 4, the third lens element 5, the fourth lens element 6, the fifth lens element 7, and the sixth lens element 8 on the optical axis I; and
the EFL is the effective focal length of the optical imaging lens 10.
Referring to fig. 3, the diagram of (a) illustrates the longitudinal spherical aberration of the first preferred embodiment, and the diagrams of (b) and (c) illustrate the astigmatic aberration of the first preferred embodiment with respect to the sagittal direction and the meridional direction on the image plane 100, respectively, and the diagram of (d) illustrates the distortion aberration of the first preferred embodiment on the image plane 100. In the longitudinal spherical aberration diagram of the first preferred embodiment shown in fig. 3(a), the curves formed by each wavelength are very close and close to the middle, which means that the off-axis light beams with different heights of each wavelength are all concentrated near the imaging point, and the deviation of the curve of each wavelength can be seen, and the deviation of the imaging point of the off-axis light beams with different heights is controlled within the range of ± 0.03mm, so that the embodiment can obviously improve the spherical aberration with the same wavelength.
In the two astigmatic aberration diagrams of FIGS. 3(b) and 3(c), the variation of the focal length of the three representative wavelengths over the entire field of view is within + -0.15 mm, which illustrates that the optical system of the first preferred embodiment can effectively eliminate the aberration. The distortion aberration diagram of fig. 3(d) shows that the distortion aberration of the first preferred embodiment is maintained within a range of ± 25%, which illustrates that the distortion aberration of the first preferred embodiment meets the imaging quality requirement of the optical system, and thus the first preferred embodiment can provide better imaging quality under the condition that the system length is shortened to 12.31mm compared with the conventional optical lens, so that the first preferred embodiment can shorten the lens length to realize thinner product design under the condition of maintaining good optical performance.
Referring to fig. 6, a second preferred embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first preferred embodiment, wherein the second preferred embodiment is mainly different from the first preferred embodiment in that: the second lens element 4 with negative refractive index has a concave image-side surface 42 and is aspheric; the image-side surface 62 of the fourth lens element 6 is concave and aspheric; the image-side surface 72 of the fifth lens element 7 has a convex portion 721 located in the vicinity of the optical axis I and a concave portion 722 located in the vicinity of the circumference.
The detailed optical data is shown in FIG. 8, and the overall system focal length of the second preferred embodiment is 1.417mm, half field of view (HFOV) is 60.0 °, aperture value (Fno) is 2.62, and the system length is 10.63mm
As shown in fig. 9, the aspheric coefficients of the object-side surface 41 of the second lens element 4 to the image-side surface 82 of the sixth lens element 8 in formula (1) are shown.
In addition, the relationship between the important parameters in the optical imaging lens 10 of the second embodiment is as follows:
G12=2.14；T2=0.52；G23=2.31；T3=0.91；
G34=0.89；T4=0.30；T5=1.16；T6=0.29；
ALT=3.67；Gaa=5.46；EFL=1.42；
ALT/T2=7.07；
Gaa/T6=18.96；
G23/T3=2.55；
Gaa/T4=18.26；
G23/T4=7.72；
Gaa/T3=6.03；
EFL/G34=1.60；
G23/G34=2.61；
ALT/G12=1.71；
ALT/G23=1.59；
T6/T2=0.55；
EFL/T4=4.74；
G23/T6=8.01；
ALT/EFL = 2.59; and
T5/T4=3.88。
referring to FIG. 7, it can be seen from the longitudinal spherical aberration of (a), the astigmatic aberrations of (b) and (c), and the distortion aberration diagram of (d) that the second preferred embodiment can maintain good optical performance.
Referring to fig. 10, a third preferred embodiment of an optical imaging lens 10 according to the present invention is substantially similar to the first preferred embodiment, wherein the third preferred embodiment is mainly different from the first preferred embodiment in that: the image-side surface 42 of the second lens element 4 is concave and aspheric; the image-side surface 82 of the sixth lens element 8 is aspheric and concave, and the image-side surface 82 has a concave portion 821 located in a region near the optical axis I.
The detailed optical data is shown in fig. 12, and the overall system focal length of the third preferred embodiment is 1.448mm, the half field angle (HFOV) is 60.0 °, the aperture value (Fno) is 2.60, and the system length is 10.80 mm.
As shown in fig. 13, the aspheric coefficients of the object-side surface 41 of the second lens element 4 to the image-side surface 82 of the sixth lens element 8 in the formula (1) are shown.
In addition, the relationship between the important parameters in the optical imaging lens 10 of the third preferred embodiment is as follows:
G12=0.99；T2=2.27；G23=1.80；T3=0.62；
G34=0.41；T4=0.45；T5=1.25；T6=0.82；
ALT=6.11；Gaa=3.29；EFL=1.45；
ALT/T2=2.69；
Gaa/T6=4.01；
G23/T3=2.90；
Gaa/T4=7.38；
G23/T4=4.03；
Gaa/T3=5.30；
EFL/G34=3.51；
G23/G34=4.35；
ALT/G12=6.16；
ALT/G23=3.40；
T6/T2=0.36；
EFL/T4=3.25；
G23/T6=2.19；
ALT/EFL = 4.22; and
T5/T4=2.80。
referring to fig. 11, it can be seen from the longitudinal spherical aberration of (a), the astigmatic aberrations of (b) and (c), and the distortion aberration diagram of (d) that the third preferred embodiment can maintain good optical performance.
Referring to fig. 14, a fourth preferred embodiment of the optical imaging lens system 10 of the present invention is substantially similar to the third preferred embodiment, except that the optical data, aspheric coefficients and parameters of the lenses 3, 4, 5, 6, 7, 8 are more or less different.
The detailed optical data is shown in fig. 16, and the overall system focal length of the fourth preferred embodiment is 1.447mm, the half field angle (HFOV) is 60.0 °, the aperture value (Fno) is 2.62, and the system length is 10.77 mm.
As shown in fig. 17, the aspheric coefficients of the object-side surface 41 of the second lens element 4 to the image-side surface 82 of the sixth lens element 8 in the formula (1) are shown.
In addition, the relationship between the important parameters in the optical imaging lens 10 of the fourth preferred embodiment is as follows:
G12=1.31；T2=1.53；G23=2.32；T3=0.38；
G34=0.45；T4=0.45；T5=1.29；T6=0.82；
ALT=5.17；Gaa=4.18；EFL=1.45；
ALT/T2=3.38；
Gaa/T6=5.07；
G23/T3=6.10；
Gaa/T4=9.24；
G23/T4=5.13；
Gaa/T3=10.99；
EFL/G34=3.19；
G23/G34=5.11；
ALT/G12=3.94；
ALT/G23=2.23；
T6/T2=0.54；
EFL/T4=3.20；
G23/T6=2.81；
ALT/EFL = 3.57; and
T5/T4=2.85。
referring to fig. 15, it can be seen from the longitudinal spherical aberration of (a), the astigmatic aberrations of (b) and (c), and the distortion aberration diagram of (d) that the fourth preferred embodiment can maintain good optical performance.
Fig. 18 shows a fifth preferred embodiment of the optical imaging lens system 10 according to the present invention, which is substantially similar to the first preferred embodiment. The fifth preferred embodiment is mainly different from the first preferred embodiment in that: the image-side surface 42 of the second lens element 4 has a concave portion 421 located in the vicinity of the optical axis I and a convex portion 424 located in the vicinity of the circumference; the image-side surface 52 of the third lens element 5 is concave and aspheric.
The detailed optical data is shown in fig. 20, and the overall system focal length of the fifth preferred embodiment is 1.456mm, the half field angle (HFOV) is 60.0 °, the aperture value (Fno) is 2.62, and the system length is 10.86 mm.
As shown in fig. 21, the aspheric coefficients of the object-side surface 41 of the second lens element 4 to the image-side surface 82 of the sixth lens element 8 in the formula (1) are shown.
In addition, the relationship between the important parameters in the optical imaging lens 10 of the fifth preferred embodiment is as follows:
G12=1.54；T2=0.97；G23=2.74；T3=1.09；
G34=0.46；T4=0.27；T5=1.00；T6=0.31；
ALT=4.48；Gaa=4.83；EFL=1.46；
ALT/T2=4.62；
Gaa/T6=15.84；
G23/T3=2.51；
Gaa/T4=17.83；
G23/T4=10.10；
Gaa/T3=4.44；
EFL/G34=3.14；
G23/G34=5.91；
ALT/G12=2.90；
ALT/G23=1.64；
T6/T2=0.31；
EFL/T4=5.37；
G23/T6=8.97；
ALT/EFL = 3.08; and
T5/T4=3.67。
referring to FIG. 19, it can be seen from the longitudinal spherical aberration of (a), the astigmatic aberrations of (b) and (c), and the distortion aberration diagram of (d) that the fifth preferred embodiment can maintain good optical performance.
Fig. 22 shows a sixth preferred embodiment of the optical imaging lens system 10 according to the present invention, which is substantially similar to the third preferred embodiment. The sixth preferred embodiment is mainly different from the third preferred embodiment in that: the image-side surface 42 of the second lens element 4 has a convex portion 425 located in the vicinity of the optical axis I and a concave portion 422 located in the vicinity of the circumference.
The detailed optical data is shown in fig. 24, and the overall system focal length of the sixth preferred embodiment is 1.450mm, the half field angle (HFOV) is 62.0 °, the aperture value (Fno) is 2.60, and the system length is 10.81 mm.
As shown in fig. 25, the aspheric coefficients of the object-side surface 41 of the second lens element 4 to the image-side surface 82 of the sixth lens element 8 in the formula (1) are shown.
In addition, the relationship between the important parameters in the optical imaging lens system 10 of the sixth preferred embodiment is as follows:
G12=1.65；T2=0.86；G23=2.66；T3=0.56；
G34=0.37；T4=0.62；T5=0.99；T6=0.80；
ALT=4.63；Gaa=4.77；EFL=1.45；
ALT/T2=5.36；
Gaa/T6=6.00；
G23/T3=4.73；
Gaa/T4=7.70；
G23/T4=4.29；
Gaa/T3=8.49；
EFL/G34=3.89；
G23/G34=7.13；
ALT/G12=2.81；
ALT/G23=1.74；
T6/T2=0.92；
EFL/T4=2.34；
G23/T6=3.35；
ALT/EFL = 3.19; and
T5/T4=1.60。
referring to fig. 23, it can be seen from the longitudinal spherical aberration of (a), the astigmatic aberrations of (b) and (c), and the distortion aberration diagram of (d) that the sixth preferred embodiment can maintain good optical performance.
Fig. 26 shows a seventh preferred embodiment of the optical imaging lens system 10 according to the present invention, which is substantially similar to the third preferred embodiment. The seventh preferred embodiment is mainly different from the third preferred embodiment in that: the image-side surface 42 of the fourth lens element 6 is concave and aspheric.
The detailed optical data is shown in fig. 28, and the overall system focal length of the seventh preferred embodiment is 1.454mm, the half field angle (HFOV) is 62.0 °, the aperture value (Fno) is 2.60, and the system length is 10.78 mm.
As shown in fig. 29, the aspheric coefficients of the object-side surface 41 of the second lens element 4 to the image-side surface 82 of the sixth lens element 8 in the formula (1) are shown.
In addition, the relationship between the important parameters in the optical imaging lens system 10 of the seventh preferred embodiment is as follows:
G12=1.44；T2=2.41；G23=0.76；T3=0.80；
G34=0.20；T4=0.73；T5=1.00；T6=0.35；
ALT=5.99；Gaa=2.49；EFL=1.45；
ALT/T2=2.48；
Gaa/T6=7.22；
G23/T3=0.95；
Gaa/T4=3.42；
G23/T4=1.05；
Gaa/T3=3.12；
EFL/G34=7.31；
G23/G34=3.82；
ALT/G12=4.15；
ALT/G23=7.87；
T6/T2=0.14；
EFL/T4=2.00；
G23/T6=2.21；
ALT/EFL = 4.12; and
T5/T4=1.37。
referring to fig. 27, it can be seen from the longitudinal spherical aberration of (a), the astigmatic aberrations of (b) and (c), and the distortion aberration diagram of (d) that the seventh preferred embodiment can maintain good optical performance.
Fig. 30 shows an eighth preferred embodiment of the optical imaging lens system 10 according to the present invention, which is substantially similar to the first preferred embodiment. The eighth preferred embodiment is mainly different from the first preferred embodiment in that: the second lens element 4 with negative refractive index has a concave portion 421 near the optical axis I and a convex portion 424 near the circumference of the image-side surface 42; the image-side surface 52 of the third lens element 5 has a convex surface 521 located in the vicinity of the optical axis I and a concave surface 522 located in the vicinity of the circumference; the image-side surface 72 of the fifth lens element 7 has a convex portion 721 located in the vicinity of the optical axis I and a concave portion 722 located in the vicinity of the circumference.
The detailed optical data is shown in fig. 32, and the overall system focal length of the eighth preferred embodiment is 1.432mm, the half field angle (HFOV) is 62.0 °, the aperture value (Fno) is 2.62, and the system length is 10.70 mm.
As shown in fig. 29, the aspheric coefficients of the object-side surface 41 of the second lens element 4 to the image-side surface 82 of the sixth lens element 8 in the formula (1) are shown.
In addition, the relationship between the important parameters in the optical imaging lens 10 of the eighth preferred embodiment is as follows:
G12=1.90；T2=0.50；G23=1.56；T3=1.65；
G34=0.78；T4=0.20；T5=1.26；T6=0.39；
ALT=5.00；Gaa=4.31；EFL=1.43；
ALT/T2=10.00；
Gaa/T6=11.08；
G23/T3=0.94；
Gaa/T4=21.56；
G23/T4=7.80；
Gaa/T3=2.61；
EFL/G34=1.83；
G23/G34=1.99；
ALT/G12=2.63；
ALT/G23=3.21；
T6/T2=0.78；
EFL/T4=7.16；
G23/T6=4.01；
ALT/EFL = 3.49; and
T5/T4=6.31。
referring to fig. 31, it can be seen from the longitudinal spherical aberration of (a), the astigmatic aberrations of (b) and (c), and the distortion aberration diagram of (d) that the eighth preferred embodiment can maintain good optical performance.
Referring to fig. 34, a table diagram of optical parameters of the eight preferred embodiments is shown, when the relationship between the optical parameters in the optical imaging lens 10 of the present invention satisfies the following conditional expressions, the optical performance will still be better under the condition of shortened system length, so that when the present invention is applied to a portable electronic device, a thinner product can be manufactured:
(1) ALT/T2 ≦ 10.5, in a case where the lens length is shortened, the total thickness ALT of the first lens element 3, the second lens element 4, the third lens element 5, the fourth lens element 6, the fifth lens element 7, and the sixth lens element 8 on the optical axis I should be designed in a decreasing direction, and the optical effective diameter of the second lens element 4 in the optical imaging lens 10 is larger, so that the second lens element 4 is designed thicker and better manufactured, and therefore the ratio of shortening of the thickness T2 of the second lens element 4 on the optical axis I is smaller than ALT. Preferably, 2.0 ALT/T2 ≦ 10.5.
(2) Gaa/T6 ≧ 3.5, the optical effective diameter of the sixth lens 8 in the optical imaging lens 10 is small and therefore can be made thin, so the thickness T6 of the sixth lens 8 on the optical axis I can be shortened in a large proportion, however, because the optical effective diameter of the second lens 4 of the optical imaging lens 10 of the present design is much larger than the optical effective diameter of the third lens 5, the light emitted from the second lens 4 needs a large air gap to be incident within the optical effective diameter of the third lens 5 within a proper height, so the proportion that the air gap G23 of the second lens 4 and the third lens 5 on the optical axis I can be reduced is small, while the air gaps between other lenses on the optical axis I can be further reduced, but the contribution of the fifth air gaps of the first lens 3 to the sixth lens 8 on the optical axis I to the shortening of the proportion Gaa is not large, therefore, the rate at which Gaa can be shortened is still small, and this relation is satisfied. Preferably, 3.5 ≦ Gaa/T6 ≦ 20.0.
(3)0.9 ≦ G23/T3 ≦ 6.5, 0.9 ≦ G23/T4 ≦ 30.0, and G23 is as described above, and the ratio of shortening is smaller, and the ratio of shortening the thickness T3 of the third lens 5 on the optical axis I and the thickness T4 of the fourth lens 6 on the optical axis I is larger for the third lens 5 and the fourth lens 6 because the optical effective diameters are smaller, however, considering the optical performance and the manufacturing capability, the ratio of G23/T3 should still be limited to 0.9 to 6.5, and the ratio of G23/T4 should still be limited to 0.9 to 30.0, and there is a preferable configuration in which the ratio of G23/T4 is still more preferably 0.9 to 12.0.
(4) Gaa/T4 ≧ 3.0, Gaa is smaller in the shortenable ratio as described above, and T4 is larger in the shortenable ratio as described above, so that this relation is satisfied. Preferably, 3.0 ≦ Gaa/T4 ≦ 23.0.
(5) Gaa/T3 ≧ 2.6, Gaa is smaller in the shortenable ratio as described above, and T3 is larger in the shortenable ratio as described above, so that this relation is satisfied. Preferably, 2.6 ≦ Gaa/T3 ≦ 11.5.
(6) EFL/G34 ≧ 1.6, the air gap G34 of the third lens 5 to the fourth lens 6 on the optical axis I is not limited in design by the surface type of the adjacent lens, so the ratio of shortening is large, and the effective focal length EFL of the optical imaging lens 10 is limited to be shortened in consideration of the size of the angle of view and the manufacturing capability, so this relation is satisfied. Preferably, 1.6 ≦ EFL/G34 ≦ 7.8.
(7)1.0 ≦ G23/G34, G23, as described above, can be shortened by a smaller ratio, and G34 is less restrictive, so the ratio of shortening can be larger, thus satisfying this relationship. Preferably, 1.0 ≦ G23/G34 ≦ 7.8.
(8)1.3 ≦ ALT/G12 ≦ 4.2, the total thickness of the first lens element 3, the second lens element 4, the third lens element 5, the fourth lens element 6, the fifth lens element 7, and the sixth lens element 8 on the optical axis I, as described above, should be designed in the decreasing direction, and the air gap G12 between the first lens element 3 and the second lens element 4 on the optical axis must be kept to a certain size to meet the optical performance requirement, but considering the manufacturing capability and the lens length, the ALT cannot be infinitely reduced, and G12 cannot be infinitely enlarged, so that the configuration of ALT/G12 is preferably 1.3 to 4.2.
(9) ALT/G23 ≦ 11.5, which satisfies the relationship that ALT should be designed in the decreasing direction and G23 cannot be shrunk, as described above. Preferably, 1.0 ALT/G23 < 11.5.
(10) T6/T2 ≦ 1.2, the optical effective diameter of the sixth lens 8 is small, and the optical effective diameter of the second lens 4 is large, so that the thickness T6 of the sixth lens 8 on the optical axis should be designed small and the thickness T2 of the second lens 4 on the optical axis should be maintained constant for manufacturing, and thus this relation is satisfied. Preferably, 0.05 ≦ T6/T2 ≦ 1.2.
(11) EFL/T4 ≦ 15.0, the effective focal length EFL of the optical imaging lens 10 is more limited to shorten considering the size of the field of view and the manufacturing capability, and T4 can be made thinner as described above, but has a better configuration between 2.0 and 15.0 considering the optical performance and the manufacturing capability.
(12) G23/T6 ≧ 2.15, and as described above, the ratio of G23 reduction is small and the ratio of T6 reduction is large, so this relationship is satisfied. Preferably, 2.15 ≦ G23/T6 ≦ 9.3.
(13) ALT/EFL ≦ 5.5. As noted above, ALT should be designed smaller, and EFL will have a shorter limit, thus satisfying this relationship. Preferably, 2.0 ALT/EFL is less than or equal to 5.5.
(14) T5/T4 ≧ 1.3, since the image side surface 72 of the fifth lens element 7 has the convex surface portion 521 in the vicinity of the optical axis I, the thickness T5 of the fifth lens element 7 on the optical axis I is inherently limited in the reduction ratio, and the thickness T4 of the fourth lens element 6 on the optical axis I is not limited, so that the reduction ratio can be large, and this relationship is satisfied. Preferably, 1.3 ≦ T5/T4 ≦ 6.7.
In summary, the optical imaging lens 10 of the present invention can achieve the following effects and advantages, so as to achieve the objectives of the present invention:
first, the object side surface 31 of the first lens element 3 has a convex portion 311 in the vicinity of the optical axis I, and the image side surface 32 has a concave portion 321 in the vicinity of the optical axis I, which helps the optical imaging lens 10 to focus light.
The object side surface 41 of the second lens element 4 has a convex surface 411 in the vicinity of the optical axis I; the object side 51 of the third lens element 5 has a convex surface 511 in the vicinity of the optical axis I; the object-side surface 71 of the fifth lens element 7 has a convex portion 711 in the vicinity of the circumference, and the image-side surface 72 has a convex portion 721 in the vicinity of the optical axis I; the image side 82 of the sixth lens element 8 has a concave portion 821 in the vicinity of the optical axis I and is made of plastic; the matching of the above lens conditions can make the aberration correction effect of the optical imaging lens 10 better, and is beneficial to reducing the weight of the optical imaging lens 10 and the manufacturing cost.
Third, the above description of the eight preferred embodiments shows the design of the optical imaging lens 10 of the present invention, and the system length of the preferred embodiments can be reduced to less than 13mm, compared to the conventional optical imaging lens, the lens of the present invention can be used to manufacture thinner products, so that the present invention has economic benefits meeting the market requirements.
Referring to fig. 35, in order to illustrate a first preferred embodiment of the electronic device 1 using the optical imaging lens 10, the electronic device 1 includes a housing 11 and an image module 12 installed in the housing 11. The electronic device 1 is described herein by way of example only as a mobile phone, but the type of the electronic device 1 is not limited thereto.
The image module 12 includes the optical imaging lens 10, a lens barrel 21 for accommodating the optical imaging lens 10, a module rear seat unit 120 for accommodating the lens barrel 21, and an image sensor 130 disposed on the image side of the optical imaging lens 10. The image plane 100 (see fig. 2) is formed on the image sensor 130.
The module rear seat unit 120 has a lens rear seat 121 and an image sensor rear seat 122 disposed between the lens rear seat 121 and the image sensor 130. The lens barrel 21 and the lens backseat 121 are coaxially disposed along an axis ii, and the lens barrel 21 is disposed inside the lens backseat 121.
Referring to fig. 36, a second preferred embodiment of the electronic device 1 applying the optical imaging lens 10 is shown, and the main differences between the second preferred embodiment and the electronic device 1 of the first preferred embodiment are: the module backseat unit 120 is of a Voice Coil Motor (VCM) type. The lens rear seat 121 has a first seat 123 attached to the outer side of the lens barrel 21 and disposed along an axis iii, a second seat 124 disposed along the axis iii and surrounding the outer side of the first seat 123, a coil 125 disposed between the outer side of the first seat 123 and the inner side of the second seat 124, and a magnetic component 126 disposed between the outer side of the coil 125 and the inner side of the second seat 124.
The first seat 123 of the lens rear seat 121 can carry the lens barrel 21 and the optical imaging lens 10 disposed in the lens barrel 21 to move along the axis iii. The image sensor rear base 122 is attached to the second base 124. The filter 9 is disposed on the image sensor rear seat 122. The other component structures of the second preferred embodiment of the electronic device 1 are similar to those of the electronic device 1 of the first preferred embodiment, and are not described herein again.
By installing the optical imaging lens 10, since the system length of the optical imaging lens 10 can be effectively shortened, the thicknesses of the first preferred embodiment and the second preferred embodiment of the electronic device 1 can be relatively reduced, so as to manufacture thinner products, and good optical performance and imaging quality can still be provided, so that the electronic device 1 of the present invention not only has the economic benefit of reducing the consumption of the casing raw materials, but also can meet the design trend of light, thin, short and small products and the consumption requirements.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (17)
1. An optical imaging lens characterized in that: the optical lens assembly comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an image side along an optical axis in sequence, wherein the first lens to the sixth lens have refractive indexes and comprise an object side surface facing the object side and allowing imaging light to pass and an image side surface facing the image side and allowing the imaging light to pass;
the object side surface of the first lens is provided with a convex surface part positioned in an area near an optical axis, and the image side surface of the first lens is provided with a concave surface part positioned in an area near the optical axis;
the object side surface of the second lens is provided with a convex surface part positioned in an area near an optical axis;
the object side surface of the third lens is provided with a convex surface part positioned in an area near an optical axis;
the object side surface of the fifth lens is provided with a convex surface part positioned in an area near the circumference, and the image side surface of the fifth lens is provided with a convex surface part positioned in an area near the optical axis; and
the image side surface of the sixth lens is provided with a concave surface part positioned in an area near an optical axis, and the sixth lens is made of plastic;
wherein, the optical imaging lens has only six lenses with refractive indexes;
and satisfies the conditional expression: Gaa/T6 ≧ 3.5;
the total of five air gaps of the first lens to the sixth lens on the optical axis is Gaa, and the thickness of the sixth lens on the optical axis is T6.
2. An optical imaging lens according to claim 1, characterized in that: the object-side surface of the fourth lens element has a convex surface portion located in a region near the optical axis, the total thickness of the first, second, third, fourth, fifth, and sixth lens elements on the optical axis is ALT, the thickness of the second lens element on the optical axis is T2, and the following conditional expressions are satisfied: ATL/T2 ≦ 10.5.
3. An optical imaging lens according to claim 1, characterized in that: an air gap between the second lens and the third lens on the optical axis is G23, a thickness of the third lens on the optical axis is T3, and the following conditional expressions are satisfied: 0.9 ≦ G23/T3 ≦ 6.5.
4. An optical imaging lens according to claim 2, characterized in that: the fourth lens has a thickness T4 on the optical axis, and satisfies the following conditional expression: Gaa/T4 ≧ 3.0.
5. An optical imaging lens according to claim 2, characterized in that: an air gap between the second lens and the third lens on the optical axis is G23, a thickness of the fourth lens on the optical axis is T4, and the following conditional expressions are satisfied: 0.9 ≦ G23/T4 ≦ 30.0.
6. An optical imaging lens according to claim 5, characterized in that: the third lens has a thickness T3 on the optical axis and satisfies the following conditional expression: Gaa/T3 ≧ 2.6.
7. An optical imaging lens according to claim 1, characterized in that: the object side surface of the fourth lens element has a convex surface portion located in a region near the optical axis, the effective focal length of the optical imaging lens system is EFL, an air gap between the third lens element and the fourth lens element on the optical axis is G34, and the following conditions are satisfied: EFL/G34 ≧ 1.6.
8. An optical imaging lens according to claim 7, characterized in that: an air gap between the second lens and the third lens on the optical axis is G23, and the following conditional expression is satisfied: G23/G34 ≧ 1.0.
9. An optical imaging lens according to claim 8, characterized in that: the total thickness of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, and the sixth lens element on the optical axis is ALT, the air gap between the first lens element and the second lens element on the optical axis is G12, and the following conditional expressions are satisfied: 1.3. ltoreq. ALT/G12. ltoreq.4.2.
10. An optical imaging lens according to claim 7, characterized in that: the total thickness of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, and the sixth lens element on the optical axis is ALT, the air gap between the second lens element and the third lens element on the optical axis is G23, and the following conditional expressions are satisfied: ALT/G23 ≦ 11.5.
11. An optical imaging lens according to claim 10, characterized in that: the second lens has a thickness T2 on the optical axis, and satisfies the following condition: T6/T2 ≦ 1.2.
12. An optical imaging lens according to claim 7, characterized in that: the fourth lens has a thickness T4 on the optical axis, and satisfies the following conditional expression: EFL/T4 ≦ 15.0.
13. An optical imaging lens according to claim 12, characterized in that: an air gap between the second lens and the third lens on the optical axis is G23, and the following conditional expression is satisfied: G23/T6 ≧ 2.15.
14. An optical imaging lens according to claim 1, characterized in that: the refractive index of the sixth lens element is negative, the total thickness of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, and the sixth lens element on the optical axis is ALT, the effective focal length of the optical imaging lens assembly is EFL, and the following conditional expressions are satisfied: ALT/EFL ≦ 5.5.
15. An optical imaging lens according to claim 14, characterized in that: an air gap between the second lens and the third lens on the optical axis is G23, and the following conditional expression is satisfied: 1.0 ≦ ALT/G23 ≦ 11.5.
16. An optical imaging lens according to claim 15, characterized in that: the fourth lens has a thickness T4 on the optical axis, the fifth lens has a thickness T5 on the optical axis, and the following conditional expressions are satisfied: T5/T4 ≧ 1.3.
17. An electronic device, characterized in that: comprises a casing; and an image module installed in the housing and including an optical imaging lens according to any one of claims 1 to 16, a lens barrel for the optical imaging lens, a module rear seat unit for the lens barrel, and an image sensor disposed on an image side of the optical imaging lens.
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| KR101740772B1 (en) * | 2014-11-28 | 2017-05-26 | 삼성전기주식회사 | Lens module |
| KR101719880B1 (en) | 2014-12-19 | 2017-03-24 | 삼성전기주식회사 | Lens module |
| CN105204143B (en) * | 2015-10-14 | 2017-07-07 | 浙江舜宇光学有限公司 | Bugeye lens |
| CN105204144B (en) * | 2015-10-20 | 2017-05-31 | 浙江舜宇光学有限公司 | Bugeye lens |
| CN113189743A (en) * | 2016-11-15 | 2021-07-30 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN106842511B (en) * | 2017-04-17 | 2022-04-12 | 浙江舜宇光学有限公司 | Camera lens |
| CN107450159B (en) * | 2017-06-08 | 2019-10-15 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| JP6699949B2 (en) | 2017-08-09 | 2020-05-27 | カンタツ株式会社 | Imaging lens |
| CN118330846A (en) * | 2018-03-30 | 2024-07-12 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN111708152A (en) * | 2018-07-13 | 2020-09-25 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN110297307B (en) * | 2019-06-13 | 2022-04-22 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN110955022B (en) * | 2019-12-16 | 2021-12-14 | 诚瑞光学(常州)股份有限公司 | Image pickup optical lens |
| CN111077658B (en) * | 2019-12-30 | 2022-04-29 | 诚瑞光学(常州)股份有限公司 | Image pickup optical lens |
| CN111965786B (en) * | 2020-08-25 | 2023-05-30 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN116841019B (en) * | 2023-09-01 | 2024-01-02 | 江西联创电子有限公司 | Optical lens |
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