CN106990507B - High-definition wide-angle optical system and camera module applying same - Google Patents
High-definition wide-angle optical system and camera module applying same Download PDFInfo
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- CN106990507B CN106990507B CN201710371784.2A CN201710371784A CN106990507B CN 106990507 B CN106990507 B CN 106990507B CN 201710371784 A CN201710371784 A CN 201710371784A CN 106990507 B CN106990507 B CN 106990507B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
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Abstract
The embodiment of the invention discloses a high-definition wide-angle optical system, which is sequentially provided with the following components from an object plane to an image plane along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; the fifth lens and the sixth lens are mutually glued to form a combined lens, and TTL/f is less than or equal to 7.5, wherein TTL is the distance between the vertex of the object plane side of the first lens of the optical system and the imaging surface, and f is the focal length of the whole optical system. On the other hand, the embodiment of the invention also provides a camera module. The embodiment of the invention mainly comprises six lenses, the number of the lenses is small, and the structure is simple; different lenses are combined with each other to enable the focal power distribution to be reasonable, and the fifth lens and the sixth lens are cemented lenses, so that the optical lens system has optical performances of large aperture, high pixel, low distortion, good heat difference elimination and the like.
Description
The technical field is as follows:
the invention relates to an optical system and a camera module applied by the same, in particular to a high-definition wide-angle optical system consisting of six lenses and a vehicle-mounted camera module applied by the same.
Background art:
along with the application and popularization of the automobile safe driving system, the vehicle-mounted camera module is also commonly applied. The camera module applied to safety monitoring in the vehicle is required to be capable of clearly imaging in both daytime and night environments, so that day and night infrared confocal of the camera module is required to be considered; simultaneously, in order to satisfy passenger's in the car detail and discern, consequently the module of making a video recording need possess higher definition. The defects of too many lenses and complex structure generally exist in the conventional optical system or camera module for meeting the requirements.
The invention content is as follows:
in order to solve the problems of excessive lenses and complex structure of the existing optical system or camera module, the embodiment of the invention provides a high-definition wide-angle optical system on the one hand.
High definition wide angle optical system is equipped with from the object plane to image plane along the optical axis in proper order: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth 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 convex surface, the image surface side of the third lens is a concave surface, and the focal power of the third lens is negative;
the object surface side of the fourth lens is a convex surface, the image surface side of the fourth lens is a convex surface, and the focal power of the fourth lens is positive;
the object surface side of the fifth lens is a convex surface, 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 concave surface, the image plane side of the sixth lens is a convex surface, and the focal power of the sixth lens is negative;
the fifth lens and the sixth lens are mutually glued to form a combined lens, and TTL/f is less than or equal to 7.5, wherein TTL is the distance between the vertex of the object plane side of the first lens of the optical system and the imaging plane, and f is the focal length of the whole optical system;
the optical system satisfies the following conditions:
(1)5mm<f56<15mm；
where f56 is the focal length of the fifth lens element combined with the sixth lens element.
On the other hand, the embodiment of the invention also provides a camera module.
The camera module at least comprises an optical lens, and the high-definition wide-angle optical system is installed in the optical lens.
The embodiment of the invention mainly comprises six lenses, the number of the lenses is small, and the structure is simple; different lenses are combined with each other to enable the focal power to be distributed reasonably, and the fifth lens and the sixth lens are cemented lenses, so that the optical lens system has the optical performances of large aperture, high pixel, low distortion, good athermal performance and the like.
Description of the drawings:
in order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an optical system or a camera module according to the present invention;
FIG. 2 is a distortion curve of the optical system or camera module of the present invention at +25 ℃;
FIG. 3 is a graph of MTF at +25 ℃ for an optical system or camera module of the present invention;
FIG. 4 is a diagram of the relative illumination of the optical system or camera module of the present invention at +25 ℃;
FIG. 5 is a graph of MTF at-40 ℃ for an optical system or camera module of the present invention;
FIG. 6 is a MTF curve of the optical system or camera module of the present invention at +85 ℃.
The specific implementation mode is as follows:
in order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, a high-definition wide-angle optical system 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, and a sixth lens 6.
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 object surface side of the second lens 2 is a convex surface, the image surface side is a concave surface, and the focal power is negative;
the object plane side of the third lens 3 is a convex surface, the image plane side is a concave surface, and the focal power is negative;
the object surface side of the fourth lens element 4 is a convex surface, the image surface side is a convex surface, and the focal power thereof is positive;
the fifth lens element 5 has a convex object surface side and a convex image surface side, and has positive focal power;
the object surface side of the sixth lens element 6 is a concave surface, the image surface side is a convex surface, and the focal power thereof is negative;
the fifth lens 5 and the sixth lens 6 are mutually glued to form a combined lens, and TTL/f is less than or equal to 7.5, wherein TTL is the distance between the object plane side vertex of the first lens of the optical system and the imaging surface, and f is the focal length of the whole optical system.
The embodiment of the invention mainly comprises six lenses, the number of the lenses is small, and the structure is simple; different lenses are combined with each other to enable the focal power distribution to be reasonable, and the fifth lens and the sixth lens are cemented lenses, so that the optical lens system has optical performances of large aperture, high pixel, low distortion, good heat difference elimination and the like.
Further, the optical system satisfies the following condition: (1)5mm < f56<15 mm; wherein f56 is the focal length of the fifth lens element 5 combined with the sixth lens element 6, and f is the focal length of the entire optical system, which is EFL. The structure is simple and compact, and good optical performance can be ensured.
Still further, each lens of the optical system satisfies the following condition: (1) -10mm < f1< -2 mm; (2) -10mm < f2< -2 mm; (3) -60mm < f3< -20 mm; (4)2mm < f4<5 mm; (5)2mm < f5<5 mm; (6) -5mm < f6< -2 mm; where 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, and f6 is the focal length of the sixth lens 6. The optical performances of large aperture, high pixel, low distortion, good athermal difference and the like are realized by adopting the mutual combination of different lenses and reasonably distributing the focal power.
Further, each lens of the optical system satisfies the following condition: (1) -5.0< f1/f < -1.5; (2) -5.0< f2/f < -1.5; (3) -30< f3/f < -10; (4)0.8< f4/f < 1.7; (5)0.8< f5/f < 1.7. The optical performances of large aperture, high pixel, low distortion, good athermal difference and the like are realized by adopting the mutual combination of different lenses and reasonably distributing the focal power.
Specifically, the refractive index Nd1 of the material and the abbe constant Vd1 of the first lens 1 satisfy: 1.74< Nd1<1.90, 37< Vd1< 55. Good optical performance can be ensured.
More specifically, the refractive index Nd2 of the material and the abbe constant Vd2 of the second lens 2 satisfy: 1.74< Nd2<1.90, 37< Vd2< 55. Good optical performance can be ensured.
Further, the refractive index Nd3 of the material and the abbe constant Vd3 of the third lens 3 satisfy: 1.75< Nd3<1.95, 17< Vd3< 40. Good optical performance can be ensured.
Still further, the refractive index Nd4 of the material and the abbe constant Vd4 of the fourth lens 4 satisfy: 1.64< Nd4<1.90, 37< Vd4< 60. Good optical performance can be ensured.
Still further, the refractive index Nd5 of the material and the abbe constant Vd5 of the fifth lens 5 satisfy: 1.60< Nd5<1.85, 40< Vd5< 60; good optical performance can be ensured.
Further, the refractive index Nd6 of the material and the abbe constant Vd6 of the sixth lens 6 satisfy: 1.75< Nd6<1.95, 17< Vd6< 40. Good optical performance can be ensured.
Still further, a diaphragm 7 of the optical system is disposed between the third lens 3 and the fourth lens 4. Simple structure and is used for adjusting the intensity of the light beam.
Specifically, in the present embodiment, the focal length f of the present optical system is 1.97mm, the diaphragm index fno is 2.0, and the field angle 2 ω is 150 °, which is suitable for 1/4 "high definition Sensor. The basic parameters of the optical system are shown in the following table:
| surface of | Radius of curvature R (mm) | Thickness D (mm) | Refractive index Nd | Dispersion value Vd |
| S1 | 17.00 | 0.70 | 1.80 | 46.56 |
| S2 | 3.05 | 1.00 | ||
| S3 | 5.00 | 0.89 | 1.77 | 49.61 |
| S4 | 2.05 | 0.80 | ||
| S5 | 3.55 | 2.15 | 1.92 | 20.88 |
| S6 | 2.35 | 0.50 | ||
| S7 | INFINITY | 0.00 | ||
| S8 | 3.20 | 2.50 | 1.67 | 55.55 |
| S9 | -3.20 | 0.10 | ||
| S10 | 7.00 | 1.90 | 1.80 | 46.56 |
| S11 | -2.00 | 0.40 | 1.92 | 20.88 |
| S12 | -15.00 | 2.00 | ||
| S13 | INFINITY | 0.40 | 1.51 | 64.21 |
| S14 | INFINITY | 1.117 | ||
| S15 | INFINITY | - |
In the above table, 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 both surfaces of the second lens 2; s5, S6 correspond to both surfaces of the third lens 3; s7 corresponds to the position of system aperture stop STO; s8, S9 correspond to both surfaces of the fourth lens 4; s10, S11 correspond to both surfaces of the fifth lens 5; s11, S12 correspond to both surfaces of the sixth lens 6; s13, S14 correspond to both surfaces of the protective glass located between the sixth lens 6 and the image plane 8; s15 corresponds to the Sensor image plane 8.
As can be seen from fig. 2 to 6, the optical system in the present embodiment, which uses different lenses to combine with each other and reasonably distributes optical power, achieves optical performance of large aperture, high pixel, low distortion, and good thermal difference elimination.
The utility model provides a module of making a video recording, includes optical lens at least, installs the aforesaid in the optical lens high definition wide angle optical system.
The camera module of the embodiment of the invention adopts different lens combinations and reasonably distributes focal power to realize optical performances of large aperture, high pixel, low distortion, good athermal difference and the like.
The foregoing is illustrative of one or more embodiments provided in connection with the detailed description and is not intended to limit the practice of the invention to the particular forms disclosed. Similar or identical methods, structures and the like as those of the present invention or several technical deductions or substitutions made on the premise of the conception of the present invention should be considered as the protection scope of the present invention.
Claims (9)
1. High definition wide angle optical system follows the optical axis and includes following six lenses that set gradually from the object plane to the image plane: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; it is characterized in that the preparation method is characterized in that,
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 convex surface, the image surface side of the third lens is a concave surface, and the focal power of the third lens is negative;
the object surface side of the fourth lens is a convex surface, the image surface side of the fourth lens is a convex surface, and the focal power of the fourth lens is positive;
the object surface side of the fifth lens is a convex surface, 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 concave surface, the image plane side of the sixth lens is a convex surface, and the focal power of the sixth lens is negative;
the fifth lens and the sixth lens are mutually glued to form a combined lens, and the TTL/f is less than or equal to 7.5, wherein the TTL is the distance between the vertex of the object plane side of the first lens of the optical system and the imaging surface, and f is the focal length of the whole optical system;
the optical system satisfies the following conditions:
(1)5mm<f56<15mm；
where f56 is the focal length of the fifth lens element combined with the sixth lens element.
2. The high definition wide angle optical system of claim 1, wherein each lens of the optical system satisfies the following condition:
(1)-10mm<f1<-2mm；
(2)-10mm<f2<-2mm；
(3)-60mm<f3<-20mm；
(4)2mm<f4<5mm；
(5)2mm<f5<5mm；
(6)-5mm<f6<-2mm；
wherein f1 is the focal length of the first lens element, f2 is the focal length of the second lens element, f3 is the focal length of the third lens element, f4 is the focal length of the fourth lens element, f5 is the focal length of the fifth lens element, and f6 is the focal length of the sixth lens element.
3. A high definition wide angle optical system as claimed in claim 1 or 2, wherein each lens of the optical system satisfies the following condition:
(1)-5.0<f1/f<-1.5；
(2)-5.0<f2/f<-1.5；
(3)-30<f3/f<-10；
(4)0.8<f4/f<1.7；
(5)0.8<f5/f<1.7；
wherein f1 is the focal length of the first lens element, f2 is the focal length of the second lens element, f3 is the focal length of the third lens element, f4 is the focal length of the fourth lens element, f5 is the focal length of the fifth lens element, and f is the focal length of the entire optical system.
4. The high-definition wide-angle optical system as claimed in claim 1 or 2, wherein the refractive index Nd1 of the material and the abbe constant Vd1 of the material of the first lens satisfy: 1.74< Nd1<1.90, 37< Vd1< 55.
5. The high-definition wide-angle optical system as claimed in claim 1 or 2, wherein the refractive index Nd2 of the material and the abbe constant Vd2 of the material of the second lens satisfy: 1.74< Nd2<1.90, 37< Vd2< 55.
6. The high-definition wide-angle optical system as claimed in claim 1 or 2, wherein the refractive index Nd3 of the material and the abbe constant Vd3 of the material of the third lens satisfy: 1.75< Nd3<1.95, 17< Vd3< 40.
7. The high-definition wide-angle optical system as claimed in claim 1 or 2, wherein the refractive index Nd4 of the material and the abbe constant Vd4 of the material of the fourth lens satisfy: 1.64< Nd4<1.90, 37< Vd4< 60.
8. The high-definition wide-angle optical system as claimed in claim 1 or 2, wherein the refractive index Nd5 of the material and the abbe constant Vd5 of the material of the fifth lens satisfy: 1.60< Nd5<1.85, 40< Vd5< 60; and/or the refractive index Nd6 of the material of the sixth lens and the Abbe constant Vd6 of the material satisfy the following conditions: 1.75< Nd6<1.95, 17< Vd6< 40.
9. The camera module at least comprises an optical lens, and is characterized in that the high-definition wide-angle optical system as claimed in any one of claims 1 to 8 is installed in the optical lens.
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| CN108363161A (en) * | 2018-01-05 | 2018-08-03 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN110109233A (en) * | 2019-05-28 | 2019-08-09 | 广东弘景光电科技股份有限公司 | Large aperture optical system and its camera module of application |
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|---|---|---|---|---|
| CN102455488A (en) * | 2010-10-29 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Ultra wide-angle lens |
| KR101429887B1 (en) * | 2013-03-22 | 2014-08-13 | 주식회사 세코닉스 | Compact type wide angle lens system |
| CN205720848U (en) * | 2016-04-25 | 2016-11-23 | 今国光学工业股份有限公司 | Six chip wide-angle lens |
| CN206920685U (en) * | 2017-05-24 | 2018-01-23 | 广东弘景光电科技股份有限公司 | High definition wide-angle optics and its camera module of application |
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| JP3833218B2 (en) * | 2004-02-13 | 2006-10-11 | 株式会社長野光学研究所 | 2 group zoom lens |
| JP6517621B2 (en) * | 2015-07-27 | 2019-05-22 | 京セラ株式会社 | Imaging lens and imaging apparatus |
| JP6591826B2 (en) * | 2015-08-07 | 2019-10-16 | マクセル株式会社 | Wide-angle imaging lens system and imaging apparatus |
| CN106443976B (en) * | 2016-12-24 | 2019-09-17 | 广东弘景光电科技股份有限公司 | Large aperture high definition optical system and its camera lens of application |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102455488A (en) * | 2010-10-29 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Ultra wide-angle lens |
| JP2012098724A (en) * | 2010-10-29 | 2012-05-24 | Kofukin Seimitsu Kogyo (Shenzhen) Yugenkoshi | Super wide angle lens |
| KR101429887B1 (en) * | 2013-03-22 | 2014-08-13 | 주식회사 세코닉스 | Compact type wide angle lens system |
| CN205720848U (en) * | 2016-04-25 | 2016-11-23 | 今国光学工业股份有限公司 | Six chip wide-angle lens |
| CN206920685U (en) * | 2017-05-24 | 2018-01-23 | 广东弘景光电科技股份有限公司 | High definition wide-angle optics and its camera module of application |
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| CN114815175B (en) | 2024-04-05 |
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