CN214504007U - Ultrathin lens - Google Patents
Ultrathin lens Download PDFInfo
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- CN214504007U CN214504007U CN202121064965.9U CN202121064965U CN214504007U CN 214504007 U CN214504007 U CN 214504007U CN 202121064965 U CN202121064965 U CN 202121064965U CN 214504007 U CN214504007 U CN 214504007U
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Abstract
The utility model relates to the technical field of imaging, in particular to an ultrathin lens, which comprises a diaphragm, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, an optical filter and an image plane, wherein the diaphragm, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the optical filter and the image plane are sequentially distributed from an object side to an image side along an optical axis; the first lens has positive refractive power, and the object side surface is a convex surface; the second lens has negative refractive power, and the image side surface is a concave surface; the third lens has refractive power; the fourth lens has positive refractive power; the fifth lens element has a negative refractive power and has at least one convex surface on an off-axis image-side surface thereof. The utility model discloses an ultra-thin camera lens has adopted five lens to through the cooperation such as the focal power of each lens, face type, the center thickness of each lens and the interaxis between each lens, let above-mentioned optical lens have advantages such as miniaturization and higher one-tenth quality. The method is suitable for small portable electronic mobile equipment.
Description
Technical Field
The utility model relates to the field of imaging technology, especially, relate to ultra-thin camera lens.
Background
With the development trend of electronic products in a form of being thin, light, thin, short, and small, the small-sized photographing lens with good imaging quality is becoming the mainstream in the market at present.
However, it is difficult for the current downsized photographing lens to satisfy both high pixel and short overall length.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an ultra-thin camera lens, it can be on the basis of the big image height greatly restrict shortened the camera lens overall length.
The utility model discloses an ultra-thin camera lens has less volume to imaging quality is good.
In order to achieve the above object, the utility model discloses a main technical scheme include:
the utility model provides an ultrathin lens, which comprises a diaphragm, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, an optical filter and an image plane, wherein the diaphragm, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the optical filter and the image plane are sequentially distributed from an object side to an image side along an optical axis; the first lens has positive refractive power, and the object side surface is a convex surface; the second lens has negative refractive power, and the image side surface is a concave surface; the third lens has refractive power; the fourth lens has positive refractive power; the fifth lens element has a negative refractive power and has at least one convex surface on an off-axis image-side surface thereof.
Further, the ultra-thin lens satisfies the following conditional expression:
TTL/IH<0.6
0.3<(R3+R4)/(R3-R4)<3
wherein, TTL is the total lens length, and IH is the lens image height; r3 and R4 are radii of curvature of the object-side surface and the image-side surface of the second lens, respectively.
Further, the ultra-thin lens satisfies the following conditional expression:
HFOV>85°
the HFOV is a field angle of the lens.
Further, the ultra-thin lens satisfies the following conditional expression:
2<|F2|/F<5
wherein F2 is the second lens focal length, and F is the lens focal length.
Further, the ultra-thin lens also satisfies the following relation:
1.5<(R7+R8)/(R7-R8)<2.5
wherein R7 and R8 are radii of curvature of the object-side surface and the image-side surface of the fourth lens element, respectively.
Further, the object side and image side surfaces of the first to fifth lenses are aspheric, wherein aspheric coefficients satisfy the following equation:
Z＝cy2/[1+{1－(1+k)c2y2}+1/2]+A4y4+A6y6+A8y8+A10y10+A12y12+A14y14+A16y16
wherein Z is aspheric sagittal height, c is aspheric paraxial curvature, y is lens caliber, k is cone coefficient, A4Is a 4-order aspheric coefficient, A6Is a 6-degree aspheric surface coefficient, A8Is an 8 th order aspheric surface coefficient, A10Is a 10 th order aspheric surface coefficient, A12Is a 12 th order aspheric surface coefficient, A14Is a 14 th order aspheric coefficient, A16Is a 16-degree aspheric coefficient.
The utility model has the advantages that: the utility model provides an ultra-thin camera lens, it has adopted five lens to through the cooperation such as the focal power of each lens, the central thickness of face type, each lens and the interaxial distance between each lens, let above-mentioned optical lens have advantages such as miniaturization and higher one-tenth quality. The method is suitable for small portable electronic mobile equipment.
Drawings
Fig. 1 shows a schematic structural diagram of an ultra-thin lens of the present invention;
fig. 2 is a schematic structural diagram of an ultrathin lens according to embodiment 1 of the present invention;
fig. 3 shows an astigmatic field curvature diagram of an ultrathin lens according to embodiment 1 of the present invention;
fig. 4 shows a distortion curve diagram of the ultra-thin lens according to embodiment 1 of the present invention;
fig. 5 is a graph showing a relative illuminance curve of the ultra-thin lens according to embodiment 1 of the present invention;
fig. 6 is a schematic structural diagram of an ultrathin lens according to embodiment 2 of the present invention;
fig. 7 shows an astigmatic field curvature diagram of an ultra-thin lens according to embodiment 2 of the present invention;
fig. 8 shows a distortion curve diagram of an ultra-thin lens according to embodiment 2 of the present invention;
fig. 9 is a graph showing a relative illuminance curve of an ultrathin lens according to embodiment 2 of the present invention;
fig. 10 is a schematic structural diagram of an ultrathin lens according to embodiment 2 of the present invention;
fig. 11 shows an astigmatic field curvature diagram of an ultrathin lens according to embodiment 3 of the present invention;
fig. 12 is a distortion curve diagram of an ultrathin lens according to embodiment 3 of the present invention;
fig. 13 shows a relative illuminance curve of the ultra-thin lens according to embodiment 3 of the present invention.
In the figure: p1: a first lens; p2: a second lens; p3: a third lens; p4: a fourth lens; p5: a fifth lens; stop: a diaphragm; IR-CUT: an optical filter; IMA: and (4) an image plane.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.
As shown in fig. 1, the present invention provides an ultra-thin lens. The ultrathin lens sequentially comprises from an object side to an image side along an optical axis: the lens comprises a diaphragm, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, an optical filter and an image plane. The first lens has positive refractive power, and the object side surface is a convex surface. The second lens has negative refractive power, and the image side surface is a concave surface. The third lens has refractive power. The fourth lens has a positive refractive power. The fifth lens has a negative refractive power and has at least one convex surface on an off-axis image-side surface thereof.
Example 1
Fig. 2 shows an optical arrangement schematic diagram of an ultra-thin lens according to embodiment 1 of the present invention. As shown in fig. 2, the ultra-thin lens according to the exemplary embodiment of the present invention sequentially includes, from an object side to an image side along an optical axis: a STOP; a first lens P1, a second lens P2, a third lens P3, a fourth lens P4, a fifth lens P5, a filter IR-CUT, and an image plane IMA.
The ultrathin lens meets the following conditional expression:
TTL/IH<0.6
wherein, TTL is the total lens length, and IH is the lens image height. The conditional expression controls the total length of the fixed image height lens to be shorter (even if the fixed image height lens is suitable for ultra-thinning), so that the fixed image height lens is used for ultra-thinned small mobile equipment such as a mobile phone.
0.3<(R3+R4)/(R3-R4)<3
Wherein R3 and R4 are radii of curvature of the object-side surface and the image-side surface of the second lens, respectively. By reasonably distributing the curvature radius of the object side and the image side of the second lens, the light deflection angle can be reduced, and the sensitivity of the lens is reduced.
HFOV>85°
The HFOV is a field angle of the lens. The ultrathin lens meeting the conditional expression has a wide-angle effect and is suitable for common front-mounted and rear-mounted lenses.
2<|F2|/F<5
Wherein F2 is the second lens focal length, and F is the lens focal length. The ultrathin lens meeting the conditional expression is beneficial to reducing aberration and improving resolving power.
1.5<(R7+R8)/(R7-R8)<2.5
Wherein R7 and R8 are radii of curvature of the object-side surface and the image-side surface of the fourth lens element, respectively. The ultrathin lens meeting the conditional expression is beneficial to reducing aberration and improving resolving power.
The design parameters of the ultrathin lens of the embodiment refer to the following table:
watch 1 (a)
Watch 1 (b)
In this embodiment, the lens meets the requirements of the above claims, and the specific parameters thereof are shown in the following table:
watch 1 (c)
Table one (a) shows the surface type, radius of curvature, thickness, and material of each lens of the optical lens of example 1. Wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table one (b) shows surface aspherical coefficients of the respective lenses of the optical lens of example 1.
According to the table one (a) and the table one (b), the lens shape and the lens attributes of the current embodiment are clearly shown.
Referring to fig. 2, which is an optical layout diagram of the ultra-thin lens of embodiment 1, it can be seen that the close arrangement of the lenses of the lens can realize the smaller structural feature of the lens.
From the astigmatic field curves in fig. 3, it is shown more clearly that: the maximum difference value of the astigmatism S line and the T line of the lens is less than 0.1mm, and the maximum value of the field curvature is less than 0.1mm, which shows that the lens has better capability of improving the astigmatism and the field curvature.
From the distortion curve in fig. 4, it is shown more clearly that: after the lens meets the requirements of the claims, the maximum distortion value of the lens is about 2%, which shows that the lens has good capability of improving the distortion.
According to the relative illuminance curve in fig. 5, it is clearly shown that: the relative illumination of the marginal field of view of the lens is more than 25%, which indicates that the lens has better brightness ratio.
Example 2
Fig. 6 shows an optical arrangement schematic diagram of an ultra-thin lens according to embodiment 2 of the present invention. As shown in fig. 6, the ultra-thin lens according to the exemplary embodiment of the present invention sequentially includes, from an object side to an image side along an optical axis: a STOP; a first lens P1, a second lens P2, a third lens P3, a fourth lens P4, a fifth lens P5, a filter IR-CUT, and an image plane IMA.
The design parameters of the ultrathin lens of the embodiment refer to the following table:
watch two (a)
Watch two (b)
| Flour mark | K | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| 1 | -5.70E-01 | -2.28E-02 | 2.56E+00 | -4.97E+01 | 5.45E+02 | -3.67E+03 | 1.53E+04 | -3.84E+04 |
| 2 | -1.94E+00 | -4.02E-01 | 9.05E-01 | -1.59E+01 | 1.74E+02 | -1.08E+03 | 4.28E+03 | -1.10E+04 |
| 3 | -1.30E+01 | -1.92E-01 | 8.61E-01 | 6.58E+00 | -7.36E+01 | 5.53E+02 | -2.53E+03 | 6.36E+03 |
| 4 | 3.72E+01 | 8.37E-03 | 2.93E+00 | -3.50E+01 | 4.48E+02 | -3.42E+03 | 1.58E+04 | -4.32E+04 |
| 5 | 1.49E+00 | -6.12E-01 | 2.50E+00 | -2.86E+01 | 2.21E+02 | -1.13E+03 | 3.75E+03 | -7.74E+03 |
| 6 | -9.18E+01 | 1.86E-01 | -2.39E+00 | 1.12E+01 | -4.08E+01 | 1.06E+02 | -1.88E+02 | 2.12E+02 |
| 7 | -2.25E+01 | -3.13E-01 | -6.56E-02 | -9.40E-01 | 1.05E+01 | -3.35E+01 | 5.41E+01 | -4.75E+01 |
| 8 | -1.31E+00 | 9.40E-02 | -9.73E-01 | 3.19E+00 | -6.75E+00 | 1.01E+01 | -9.42E+00 | 5.14E+00 |
| 9 | -8.15E+01 | -6.36E-01 | 8.64E-01 | -6.36E-01 | 3.02E-01 | -9.67E-02 | 2.08E-02 | -2.88E-03 |
| 10 | -1.35E+01 | -2.34E-01 | 2.18E-01 | -1.39E-01 | 5.47E-02 | -1.18E-02 | 7.61E-04 | 2.11E-04 |
In this embodiment, the lens meets the requirements of the above claims, and the specific parameters are shown in the following table:
watch two (c)
Table two (a) shows the surface type, radius of curvature, thickness, and material of each lens of the optical lens of example 2. Wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table two (b) shows surface aspherical coefficients of the respective lenses of the optical lens of example 2.
According to the second table (a) and the second table (b), the lens shape and the attributes of the lens of the current embodiment are clearly shown.
Referring to fig. 6, which is an optical arrangement diagram of the ultra-thin lens of embodiment 2, it can be seen that the close arrangement of the lenses of the lens can realize the smaller structural features of the lens.
According to the astigmatic field curvature curve in fig. 7, it is clearly shown that the maximum difference between the astigmatic S line and the T line of the lens is below 0.1mm, and the maximum field curvature is below about 0.1mm, indicating that the lens has better capability of improving astigmatism and field curvature.
According to the distortion curve in fig. 8, it is clearly shown that after the lens meets the requirements of the claims, the maximum distortion value of the lens is about 2%, which indicates that the lens has a good capability of improving distortion.
According to the relative illumination curve in fig. 9, it is clearly shown that the relative illumination of the peripheral field of view of the lens is greater than 25%, indicating that the lens has a better brightness ratio.
Example 3
Fig. 10 is a schematic view showing an optical arrangement of an ultra-thin lens according to embodiment 3 of the present invention. As shown in fig. 10, the ultra-thin lens according to the exemplary embodiment of the present invention includes, in order from an object side to an image side along an optical axis: a STOP; a first lens P1, a second lens P2, a third lens P3, a fourth lens P4, a fifth lens P5, a filter IR-CUT, and an image plane IMA.
The design parameters of the ultrathin lens of the embodiment refer to the following table:
watch III (a)
Watch III (b)
| Flour mark | K | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| 1 | -5.15E-01 | -8.04E-02 | 4.34E+00 | -8.82E+01 | 1.03E+03 | -7.37E+03 | 3.25E+04 | -8.60E+04 |
| 2 | -1.92E+00 | -3.79E-01 | 1.79E+00 | -1.34E+01 | 1.01E+02 | -6.03E+02 | 2.43E+03 | -6.80E+03 |
| 3 | -1.30E+01 | -3.34E-01 | 2.77E+00 | -2.04E+01 | 1.91E+02 | -1.32E+03 | 5.72E+03 | -1.54E+04 |
| 4 | 1.49E+01 | -1.39E-01 | 7.91E-01 | -1.51E+00 | 8.34E+01 | -1.07E+03 | 6.36E+03 | -2.04E+04 |
| 5 | 1.73E+00 | -6.29E-01 | 6.26E-01 | 3.12E+00 | -4.39E+01 | 2.02E+02 | -4.64E+02 | 4.71E+02 |
| 6 | -9.17E+01 | -9.63E-02 | -8.36E-01 | 4.92E+00 | -2.59E+01 | 9.21E+01 | -2.10E+02 | 2.95E+02 |
| 7 | -2.26E+01 | -8.60E-02 | -9.33E-01 | 4.12E+00 | -9.27E+00 | 1.29E+01 | -1.19E+01 | 7.18E+00 |
| 8 | -1.94E+00 | 5.43E-02 | -8.40E-01 | 2.30E+00 | -3.73E+00 | 4.97E+00 | -4.75E+00 | 2.76E+00 |
| 9 | -4.75E+01 | -6.05E-01 | 7.64E-01 | -5.22E-01 | 2.33E-01 | -7.01E-02 | 1.41E-02 | -1.79E-03 |
| 10 | -1.39E+01 | -2.67E-01 | 2.99E-01 | -2.34E-01 | 1.17E-01 | -3.65E-02 | 6.85E-03 | -6.95E-04 |
In this embodiment, the lens meets the requirements of the above claims, and the specific parameters are shown in the following table:
watch III (c)
Table three (a) shows the surface type, radius of curvature, thickness, and material of each lens of the optical lens of example 3. Wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table three (b) shows surface aspherical coefficients of the respective lenses of the optical lens of example 3.
According to table three (a) and table three (b), the lens shape and various attributes of the lens of the current embodiment are clearly shown.
Referring to fig. 10, which is an optical arrangement diagram of the ultra-thin lens of embodiment 3, it can be seen that the close arrangement of the lenses of the lens can realize the smaller structural features of the lens.
According to the astigmatic field curvature curve in fig. 11, it is clearly shown that the maximum difference between the astigmatic S line and the T line of the lens is below 0.1mm, and the maximum value of the field curvature is below about 0.1mm, which indicates that the lens has better capability of improving astigmatism and field curvature.
According to the distortion curve in fig. 12, it is clearly shown that after the lens meets the requirements of the claims, the maximum distortion value of the lens is about 2%, which indicates that the lens has a good capability of improving distortion.
According to the relative illumination curve in fig. 13, it is clearly shown that the relative illumination of the peripheral field of view of the lens is greater than 25%, indicating that the lens has a better brightness ratio.
While embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that modifications, alterations, substitutions and variations may be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (6)
1. The ultrathin lens is characterized by comprising a diaphragm, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, an optical filter and an image plane which are sequentially distributed from an object side to an image side along an optical axis;
the first lens has positive refractive power, and the object side surface is a convex surface;
the second lens has negative refractive power, and the image side surface is a concave surface;
the third lens has refractive power;
the fourth lens has positive refractive power;
the fifth lens element has a negative refractive power and has at least one convex surface on an off-axis image-side surface thereof.
2. The ultra-thin lens of claim 1, wherein the ultra-thin lens satisfies the following conditional expression:
TTL/IH<0.6
0.3<(R3+R4)/(R3-R4)<3
wherein, TTL is the total lens length, and IH is the lens image height; r3 and R4 are radii of curvature of the object-side surface and the image-side surface of the second lens, respectively.
3. The ultra-thin lens of claim 1, wherein the ultra-thin lens satisfies the following conditional expression:
HFOV>85°
the HFOV is a field angle of the lens.
4. The ultra-thin lens of claim 1, wherein the ultra-thin lens satisfies the following conditional expression:
2<|F2|/F<5
wherein F2 is the second lens focal length, and F is the lens focal length.
5. The ultra-thin lens of claim 1, further satisfying the following relationship:
1.5<(R7+R8)/(R7-R8)<2.5
wherein R7 and R8 are radii of curvature of the object-side surface and the image-side surface of the fourth lens element, respectively.
6. The ultra-thin lens system of claim 1, wherein the object-side and image-side surfaces of the first to fifth lenses are aspheric, and the aspheric coefficients satisfy the following equation:
Z＝cy2/[1+{1－(1+k)c2y2}+1/2]+A4y4+A6y6+A8y8+A10y10+A12y12+A14y14+A16y16
wherein Z is aspheric sagittal height, c is aspheric paraxial curvature, y is lens caliber, k is cone coefficient, A4Is a 4-order aspheric coefficient, A6Is a 6-degree aspheric surface coefficient, A8Is 8 timesAspherical coefficient, A10Is a 10 th order aspheric surface coefficient, A12Is a 12 th order aspheric surface coefficient, A14Is a 14 th order aspheric coefficient, A16Is a 16-degree aspheric coefficient.
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| CN202121064965.9U CN214504007U (en) | 2021-05-18 | 2021-05-18 | Ultrathin lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113126263A (en) * | 2021-05-18 | 2021-07-16 | 辽宁中蓝光电科技有限公司 | Ultrathin lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113126263A (en) * | 2021-05-18 | 2021-07-16 | 辽宁中蓝光电科技有限公司 | Ultrathin lens |
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Denomination of utility model: Ultrathin lens Effective date of registration: 20220929 Granted publication date: 20211026 Pledgee: China Construction Bank Corporation Panjin branch Pledgor: Liaoning Zhonglan Photoelectric Technology Co.,Ltd. Registration number: Y2022210000157 |