CN218122347U - High-pixel day and night dual-purpose optical system and camera module applying same - Google Patents
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Abstract
The application provides a dual-purpose type optical system of high pixel day night and camera module of using thereof, optical system mainly comprises 7 lens, and the lens number is reasonable, simple structure, and is small, light in weight, with low costs, and the pixel is high, through the intercombination of different lens and rational distribution focal power, has wide angle of vision, the aperture is big, the high and fine dual-purpose performance's of pixel advantage day night, can guarantee sufficient field range, is particularly useful for in the security protection monitored control system.
Description
Technical Field
The application relates to an optical system and a camera module applied by the same, in particular to a high-pixel day and night dual-purpose optical system used in a security monitoring system and a camera module applied by the same.
Background
Along with social development, the living standard of people is continuously improved, and a security monitoring system plays an increasingly important role in daily life of people. The security lens is the key core of the security monitoring system and determines the imaging effect of the security monitoring system. However, most security lenses on the market at present have the defects of complex structure, large volume, low pixel, small aperture, poor infrared effect and small field angle.
SUMMERY OF THE UTILITY MODEL
For overcoming the problem that the existing photographing module or optical system has complex structure and large volume, the application provides a high-pixel day and night dual-purpose optical system on the one hand.
High pixel day night dual-purpose type optical system includes along the optical axis from the object plane to image plane in proper order: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens;
the object surface side of the first lens is a convex surface, the image surface side of the first lens is a concave surface, and the focal power of the first lens is negative;
the object surface side of the second lens is a convex surface, the image surface side of the second lens is a concave surface, and the focal power of the second lens is negative.
The object surface side of the third lens is a concave surface, the image surface side of the third lens is a convex surface, and the focal power of the third lens is positive;
the object surface side of the fourth lens is a concave surface, the image surface side of the fourth lens is a convex surface, and the focal power of the fourth lens is positive;
the image surface side of the fifth lens is a convex surface, and the focal power of the fifth lens is positive;
the object plane side of the sixth lens is a convex surface, and the image plane side of the sixth lens is a concave surface; the focal power is negative;
the object surface side of the seventh lens is a convex surface, and the image surface side of the seventh lens is a convex surface; the focal power is positive.
The high-pixel day-and-night type optical system as described above satisfies the following conditions:
(1)-5.85＜f1/f＜-4.5；
(2)-2.5＜f2/f＜-2.0；
(3)7.0＜f3/f＜8.5；
(4)9.0＜f4/f＜10.2；
(5)2.5＜f5/f＜3.5；
(6)-2.15＜f6/f＜-1.55；
(7)1.55＜f7/f＜2.15；
wherein f is a focal length of the entire optical system, f1 is a focal length of the first lens, f2 is a focal length of the second lens, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, f5 is a focal length of the fifth lens, f6 is a focal length of the sixth lens, and f7 is a focal length of the seventh lens.
As described above, in the high-pixel day-and-night optical system, the horizontal angle of view satisfies: HFOV is more than or equal to 105 degrees and less than or equal to 125 degrees.
In the high-pixel day and night optical system, the refractive index Nd1 of the material of the first lens and the abbe constant Vd1 of the material satisfy: nd1 is more than 1.65, and Vd1 is less than 60.
In the high-pixel day-and-night optical system, the refractive index Nd2 of the material and the abbe constant Vd2 of the material of the second lens satisfy: nd2 is less than 1.55, and Vd2 is more than 55.
In the high-pixel day-and-night optical system, the refractive index Nd3 of the material and the abbe constant Vd3 of the material of the third lens satisfy: nd3 is more than 1.65, vd3 is less than 22.
In the high-pixel day-and-night optical system, the refractive index Nd4 of the material and the abbe constant Vd4 of the material of the fourth lens satisfy: nd4 is less than 1.55, and Vd4 is more than 55.
In the high-pixel day and night optical system, the refractive index Nd5 of the material and the abbe constant Vd5 of the material of the fifth lens satisfy: nd5 is less than 1.45, vd5 is more than 92;
the refractive index Nd6 of the material of the sixth lens and the Abbe constant Vd6 of the material satisfy that: nd6 is less than 1.65, vd6 is more than 22;
the refractive index Nd7 of the material of the seventh lens and the Abbe constant Vd7 of the material satisfy the following conditions: nd7 is less than 1.55, and Vd7 is more than 55.
As described above, in the high-pixel day-and-night type optical system, the aperture stop is located between the third lens and the fourth lens.
On the other hand, this application embodiment still provides a module of making a video recording.
A camera module at least comprises an optical lens, and the high-pixel day and night dual-purpose optical system is installed in the optical lens.
Compared with the prior art, the beneficial effects of this application are as follows:
the utility model discloses optical system and camera module mainly comprise 7 pieces of lenses, and the lens number is reasonable, simple structure, and is small, light in weight, with low costs, and the pixel is high, and through the intercombination of different lenses and rational distribution focal power, has the advantage of wide, the big, the high and good day night dual-purpose performance of angle of vision of field, light ring, pixel, can guarantee sufficient field range, is particularly useful for among the security protection monitored control system.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below.
FIG. 1 is a schematic structural diagram of an optical system or a camera module according to the present application;
FIG. 2 is a graph of a visible light MTF transfer function of an optical system or a camera module according to the present application;
FIG. 3 is a graph of the 850nm MTF transfer function of the optical system or camera module of the present application;
fig. 4 is a relative illuminance diagram of the optical system or the camera module according to the present application.
Detailed Description
As shown in fig. 1, the present application provides a high-pixel day-and-night optical system, which includes, in order from an object plane to an image plane 8 along an optical axis: a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, and a seventh lens 7.
The object surface side of the first lens 1 is a convex surface, the image surface side is a concave surface, and the focal power is negative;
the second lens element 2 has a convex object surface side and a concave image surface side, and has negative refractive power.
The object surface side of the third lens 3 is a concave surface, the image surface side is a convex surface, and the focal power is positive;
the object surface side of the fourth lens 4 is a concave surface, the image surface side is a convex surface, and the focal power is positive;
the image surface side of the fifth lens 5 is a convex surface, the image surface side is a convex surface, and the focal power of the fifth lens is positive;
the object plane side of the sixth lens element 6 is a convex surface, and the image plane side is a concave surface; the focal power is negative;
the object surface side of the seventh lens element 7 is a convex surface, and the image surface side is a convex surface; the focal power is positive.
The application provides high-pixel day and night dual-purpose optical system, which mainly comprises 7 lenses, the number of the lenses is reasonable, the structure is simple, the size is small, the weight is light, the cost is low, the pixels are high, and the dual-purpose optical system has the advantages of wide field angle, large aperture, high pixels and excellent day and night dual-purpose performance through the mutual combination of different lenses and reasonable distribution of focal power, can ensure sufficient field range, and is particularly suitable for a security monitoring system.
Preferably, the optical system satisfies the following condition:
(1)-5.85＜f1/f＜-4.5；
(2)-2.5＜f2/f＜-2.0；
(3)7.0＜f3/f＜8.5；
(4)9.0＜f4/f＜10.2；
(5)2.5＜f5/f＜3.5；
(6)-2.15＜f6/f＜-1.55；
(7)1.55＜f7/f＜2.15；
wherein f is the focal length of the whole optical system, f1 is the focal length of the first lens 1, f2 is the focal length of the second lens 2, f3 is the focal length of the third lens 3, f4 is the focal length of the fourth lens 4, f5 is the focal length of the fifth lens 5, f6 is the focal length of the sixth lens 6, and f7 is the focal length of the seventh lens 7.
Preferably, the horizontal field angle satisfies: the HFOV is more than or equal to 105 degrees and less than or equal to 125 degrees, can ensure sufficient field range, and has the advantage of wide field angle.
Preferably, the refractive index Nd1 of the material and the abbe constant Vd1 of the material of the first lens 1 satisfy: nd1 is more than 1.65, vd1 is less than 60, the structure is simple, and good optical performance can be ensured.
Preferably, the refractive index Nd2 of the material of the second lens 2 and the abbe constant Vd2 of the material satisfy: nd2 is less than 1.55, vd2 is more than 55, the structure is simple, and good optical performance can be ensured.
Preferably, the refractive index Nd3 of the material and the abbe constant Vd3 of the material of the third lens 3 satisfy: nd3 is more than 1.65, vd3 is less than 22, the structure is simple, and good optical performance can be ensured.
Preferably, the refractive index Nd4 of the material and the abbe constant Vd4 of the material of the fourth lens 4 satisfy: nd4 is less than 1.55, vd4 is more than 55, the structure is simple, and good optical performance can be ensured.
Preferably, the refractive index Nd5 of the material of the fifth lens 5 and the abbe constant Vd5 of the material satisfy: nd5 is less than 1.45, vd5 is more than 92, the structure is simple, and good optical performance can be ensured.
Preferably, the refractive index Nd6 of the material and the abbe constant Vd6 of the material of the sixth lens 6 satisfy: nd6 is less than 1.65, vd6 is more than 22, the structure is simple, and good optical performance can be ensured.
Preferably, the material refractive index Nd7 and the material abbe constant Vd7 of the seventh lens 7 satisfy: nd7 is less than 1.55, vd7 is more than 55, the structure is simple, and good optical performance can be ensured.
Preferably, an aperture stop 9 is located between the third lens 3 and the fourth lens 4, near the fourth lens 4 side, for adjusting the intensity of the light beam.
A camera module at least comprises the optical lens, wherein the high-pixel day and night dual-purpose optical system is installed in the optical lens, and the optical system sequentially comprises a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6 and a seventh lens 7 from an object plane to an image plane along an optical axis.
The application provides a module of making a video recording, optical system mainly comprises 7 pieces of lens, and the lens number is reasonable, simple structure, and is small, light in weight, with low costs, and the pixel is high, and through the intercombination of different lenses and rational distribution focal power, has the advantage of wide angle of vision, big, the high and good dual-purpose performance of pixel of light ring, can guarantee sufficient field range, is particularly useful for among the security protection monitored control system.
Specifically, as a preferred embodiment of the present invention without limitation, in this embodiment, the focal length f =3.10mm, f/NO =1.6, hfov =114.46 °, TTL =22.64mm, the focal length f1= -17.21mm of the first lens 1, the focal length f2= -6.69mm of the second lens 2, the focal length f3=23.95mm of the third lens 3, the focal length f4=29.11mm of the fourth lens 4, the focal length f5=8.13mm of the fifth lens 5, the focal length f6= -5.60mm of the sixth lens 6, and the focal length f7=5.31mm of the seventh lens 7, and the basic parameters of the optical system may be as shown in table 1 below:
table 1: basic parameters of optical system
| Surface number | Radius of curvature R (mm) | Spacing D (mm) | Refractive index Nd | Dispersion Vd |
| S1 | 33.34 | 0.86 | 1.70 | 55.53 |
| S2 | 8.76 | 0.29 | ||
| S3 | 10.31 | 0.73 | 1.54 | 55.71 |
| S4 | 2.60 | 2.55 | ||
| S5 | -15.33 | 3.39 | 1.66 | 20.37 |
| S6 | -8.53 | 0.00 | ||
| STO | INFINITY | 0.53 | ||
| S8 | -4.54 | 1.48 | 1.54 | 55.71 |
| S9 | -3.92 | 0.06 | ||
| S10 | 6.49 | 3.81 | 1.44 | 94.52 |
| S11 | -6.49 | 0.10 | ||
| S12 | 52.39 | 0.69 | 1.64 | 23.55 |
| S13 | 3.36 | 0.16 | ||
| S14 | 4.28 | 2.45 | 1.54 | 55.71 |
| S15 | -6.83 | 3.43 | ||
| S16 | INFINITY | 0.72 | 1.52 | 64.20 |
| S17 | INFINITY | 1.40 | ||
| IMA | INFINITY | 0.00 |
In the above table 1, S1 and S2 correspond to two surfaces of the first lens 1 from the object plane to the image plane 8 along the optical axis; s3, S4 correspond to the two surfaces of the second lens 2; s5, S6 correspond to both surfaces of the third lens 3; STO is where stop 9 is located; s8, S9 correspond to both surfaces of the fourth lens 4; s10, S11 correspond to both surfaces of the fifth lens 5; s12, S13 correspond to both surfaces of the sixth lens 6; s14, S15 correspond to both surfaces of the seventh lens 7; s16, S17 correspond to both surfaces of the filter 10 between the seventh lens 7 and the image plane 8; IMA is the image plane 8.
Further, the surfaces of the second lens 2, the third lens 3, the fourth lens 4, the sixth lens 6, and the seventh lens 7 are all aspheric in shape, which satisfies the following equation:
wherein, the parameter c =1/R is curvature corresponding to radius, y is radial coordinate, unit of which is the same as lens length unit, k is conic coefficient, a 1 To a 8 The coefficients are respectively corresponding to the radial coordinates. Aspheric correlation values of the second lens 2, the third lens 3, the fourth lens 4, the sixth lens 6 and the seventh lens 7 can be shown in the following table 2:
table 2: aspheric correlation value of lens surface
As another preferred embodiment of the present invention, but not limited thereto, in this embodiment, the focal length f =3.24mm, f/NO =1.6, hfov =108.62 °, TTL =23.86mm, the focal length f1= -17.94mm of the first lens 1, the focal length f2= -6.92mm of the second lens 2, the focal length f3=23.60mm of the third lens 3, the focal length f4=29.37mm of the fourth lens 4, the focal length f5=8.17mm of the fifth lens 5, the focal length f6= -5.58mm of the sixth lens 6, and the focal length f7=5.34mm of the seventh lens 7, and the basic parameters of the optical system may be as shown in the following table 3:
table 3: basic parameters of optical system
| Surface number | Radius of curvature R (mm) | Spacing D (mm) | Refractive index Nd | Dispersion Vd |
| S1 | 36.60 | 1.69 | 1.70 | 55.53 |
| S2 | 9.17 | 0.29 | ||
| S3 | 10.19 | 1.00 | 1.54 | 55.71 |
| S4 | 2.63 | 2.53 | ||
| S5 | -15.35 | 3.38 | 1.66 | 20.37 |
| S6 | -8.46 | -0.04 | ||
| STO | INFINITY | 0.53 | ||
| S8 | -4.54 | 1.43 | 1.54 | 55.71 |
| S9 | -3.92 | 0.06 | ||
| S10 | 6.51 | 3.95 | 1.44 | 94.52 |
| S11 | -6.51 | 0.12 | ||
| S12 | 53.06 | 0.67 | 1.64 | 23.55 |
| S13 | 3.36 | 0.19 | ||
| S14 | 4.29 | 2.55 | 1.54 | 55.71 |
| S15 | -6.87 | 3.42 | ||
| S16 | INFINITY | 0.72 | 1.52 | 64.20 |
| S17 | INFINITY | 1.40 | ||
| IMA | INFINITY | 0.00 |
In the above table 3, S1 and S2 correspond to two surfaces of the first lens 1 from the object plane to the image plane 8 along the optical axis; s3, S4 correspond to the two surfaces of the second lens 2; s5, S6 correspond to both surfaces of the third lens 3; STO is where stop 9 is located; s8, S9 correspond to both surfaces of the fourth lens 4; s10, S11 correspond to both surfaces of the fifth lens 5; s12, S13 correspond to both surfaces of the sixth lens 6; s14, S15 correspond to both surfaces of the seventh lens 7; s16, S17 correspond to both surfaces of the filter 10 between the seventh lens 7 and the image plane 8; IMA is the image plane 8.
Further, the surfaces of the second lens 2, the third lens 3, the fourth lens 4, the sixth lens 6, and the seventh lens 7 are all aspheric in shape, which satisfies the following equation:
wherein, the parameter c =1/R is curvature corresponding to radius, y is radial coordinate with the same unit as the length unit of the lens, k is conic section coefficient, a 1 To a 8 The coefficients are respectively corresponding to the radial coordinates. Aspheric correlation values of the second lens 2, the third lens 3, the fourth lens 4, the sixth lens 6 and the seventh lens 7 can be shown in the following table 4:
table 4: aspheric correlation value of lens surface
As another preferred embodiment of the present invention, but not limited thereto, in this embodiment, the focal length f =2.96mm, f/NO =1.6, hfov =123.32 °, TTL =22.20mm, the focal length f1= -15.80mm for the first lens 1, the focal length f2= -6.68mm for the second lens 2, the focal length f3=24.18mm for the third lens 3, the focal length f4=29.81mm for the fourth lens 4, the focal length f5=7.96mm for the fifth lens 5, the focal length f6= -5.63mm for the sixth lens 6, and the focal length f7=5.28mm for the seventh lens 7, and the basic parameters of the optical system may be as shown in the following table 5:
table 5: basic parameters of optical system
| Surface of | Radius of curvature R (mm) | Spacing D (mm) | Refractive index Nd | Dispersion Vd |
| S1 | 34.88 | 0.80 | 1.70 | 55.53 |
| S2 | 8.32 | 0.29 | ||
| S3 | 10.67 | 0.70 | 1.54 | 55.71 |
| S4 | 2.63 | 2.63 | ||
| S5 | -16.24 | 3.37 | 1.66 | 20.37 |
| S6 | -8.77 | -0.07 | ||
| STO | INFINITY | 0.53 | ||
| S8 | -4.56 | 1.51 | 1.54 | 55.71 |
| S9 | -3.96 | 0.06 | ||
| S10 | 6.43 | 3.40 | 1.44 | 94.52 |
| S11 | -6.43 | 0.08 | ||
| S12 | 53.66 | 0.71 | 1.64 | 23.55 |
| S13 | 3.39 | 0.19 | ||
| S14 | 4.29 | 2.48 | 1.54 | 55.71 |
| S15 | -6.69 | 3.42 | ||
| S16 | INFINITY | 0.72 | 1.52 | 64.20 |
| S17 | INFINITY | 1.40 | ||
| IMA | INFINITY | 0.00 |
In the above table 5, S1, S2 correspond to two surfaces of the first lens 1 from the object plane to the image plane 8 along the optical axis; s3, S4 correspond to the two surfaces of the second lens 2; s5, S6 correspond to both surfaces of the third lens 3; STO is where stop 9 is located; s8, S9 correspond to both surfaces of the fourth lens 4; s10, S11 correspond to both surfaces of the fifth lens 5; s12, S13 correspond to both surfaces of the sixth lens 6; s14, S15 correspond to both surfaces of the seventh lens 7; s16, S17 correspond to both surfaces of the filter 10 between the seventh lens 7 and the image plane 8; IMA is the image plane 8.
Further, the surfaces of the second lens 2, the third lens 3, the fourth lens 4, the sixth lens 6, and the seventh lens 7 are all aspheric in shape, which satisfies the following equation:
wherein, the parameter c =1/R is curvature corresponding to radius, y is radial coordinate, unit of which is the same as lens length unit, k is conic coefficient, a 1 To a 8 The coefficients are respectively corresponding to the radial coordinates. The second lens 2, the third lens 3 and the fourth lensThe aspherical correlation values of the mirror 4, the sixth lens 6, and the seventh lens 7 may be as shown in table 6 below:
table 6: aspheric correlation value of lens surface
As can be seen from fig. 2 to 4, the optical system of the present embodiment has the advantages of wide field angle, large aperture, high pixel and excellent day and night performance, and can ensure a sufficient field of view.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.
Claims (10)
1. High pixel day night dual-purpose type optical system includes from the object plane to image plane along the optical axis in proper order: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, and a seventh lens element, wherein:
the object surface side of the first lens is a convex surface, the image surface side of the first lens is a concave surface, and the focal power of the first lens is negative;
the object surface side of the second lens is a convex surface, the image surface side of the second lens is a concave surface, and the focal power of the second lens is negative;
the object surface side of the third lens is a concave surface, the image surface side of the third lens is a convex surface, and the focal power of the third lens is positive;
the object surface side of the fourth lens is a concave surface, the image surface side of the fourth lens is a convex surface, and the focal power of the fourth lens is positive;
the image surface side of the fifth lens is a convex surface, and the focal power of the fifth lens is positive;
the object plane side of the sixth lens is a convex surface, and the image plane side of the sixth lens is a concave surface; the focal power thereof is negative;
the object surface side of the seventh lens is a convex surface, and the image surface side of the seventh lens is a convex surface; the focal power is positive.
2. The high-pixel day-and-night optical system according to claim 1, characterized in that: the optical system satisfies the following conditions:
(1)-5.85＜f1/f＜-4.5；
(2)-2.5＜f2/f＜-2.0；
(3)7.0＜f3/f＜8.5；
(4)9.0＜f4/f＜10.2；
(5)2.5＜f5/f＜3.5；
(6)-2.15＜f6/f＜-1.55；
(7)1.55＜f7/f＜2.15；
wherein f is a focal length of the entire optical system, f1 is a focal length of the first lens, f2 is a focal length of the second lens, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, f5 is a focal length of the fifth lens, f6 is a focal length of the sixth lens, and f7 is a focal length of the seventh lens.
3. The high-pixel day-and-night type optical system according to claim 1 or 2, characterized in that: the horizontal field angle satisfies: HFOV is more than or equal to 105 degrees and less than or equal to 125 degrees.
4. The high-pixel day-and-night type optical system according to claim 1 or 2, characterized in that: the refractive index Nd1 of the material of the first lens and the Abbe constant Vd1 of the material satisfy that: nd1 is more than 1.65, and Vd1 is less than 60.
5. The high-pixel day-and-night type optical system according to claim 1 or 2, characterized in that: the refractive index Nd2 of the material of the second lens and the Abbe constant Vd2 of the material satisfy that: nd2 is less than 1.55, and Vd2 is more than 55.
6. The high-pixel day-and-night type optical system according to claim 1 or 2, characterized in that: the refractive index Nd3 of the material of the third lens and the Abbe constant Vd3 of the material satisfy that: nd3 is more than 1.65, vd3 is less than 22.
7. The high-pixel day-and-night type optical system according to claim 1 or 2, characterized in that: the refractive index Nd4 of the material of the fourth lens and the Abbe constant Vd4 of the material satisfy the following conditions: nd4 is less than 1.55, and Vd4 is more than 55.
8. The high-pixel day-and-night type optical system according to claim 1 or 2, characterized in that: the refractive index Nd5 of the material of the fifth lens and the Abbe constant Vd5 of the material satisfy that: nd5 is less than 1.45, vd5 is more than 92;
the refractive index Nd6 of the material of the sixth lens and the Abbe constant Vd6 of the material satisfy the following conditions: nd6 is less than 1.65, vd6 is more than 22;
the refractive index Nd7 of the material of the seventh lens and the Abbe constant Vd7 of the material satisfy the following conditions: nd7 is less than 1.55, and Vd7 is more than 55.
9. A high-pixel day-and-night optical system according to any one of claims 1 or 2, characterized in that: the aperture stop is located between the third lens and the fourth lens.
10. A camera module comprising at least an optical lens, wherein the high-pixel day and night optical system according to any one of claims 1 to 9 is mounted in the optical lens.
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| CN115248494A (en) * | 2022-07-14 | 2022-10-28 | 广东弘景光电科技股份有限公司 | High-pixel day and night dual-purpose optical system and camera module applying same |
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| CN115248494A (en) * | 2022-07-14 | 2022-10-28 | 广东弘景光电科技股份有限公司 | High-pixel day and night dual-purpose optical system and camera module applying same |
| CN115248494B (en) * | 2022-07-14 | 2024-02-27 | 广东弘景光电科技股份有限公司 | High-pixel day-night dual-purpose optical system and camera module applying same |
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