CN113960773B - Optical imaging lens and imaging apparatus - Google Patents
Optical imaging lens and imaging apparatus Download PDFInfo
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- CN113960773B CN113960773B CN202111581744.3A CN202111581744A CN113960773B CN 113960773 B CN113960773 B CN 113960773B CN 202111581744 A CN202111581744 A CN 202111581744A CN 113960773 B CN113960773 B CN 113960773B
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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
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
Abstract
The invention discloses an optical imaging lens and imaging equipment, the optical imaging lens comprises the following components in sequence from an object side to an imaging surface along an optical axis: a first lens having a negative optical power, both the object-side surface and the image-side surface of which are concave; a second lens with positive focal power, wherein the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; a diaphragm; a third lens having a positive refractive power, both the object-side surface and the image-side surface of the third lens being convex; a fourth lens element with negative refractive power having a convex object-side surface and a concave image-side surface; a fifth lens element having a positive refractive power, the object-side surface and the image-side surface of the fifth lens element being convex; a sixth lens element having a focal power, an object-side surface being convex at a paraxial region and an image-side surface being concave at the paraxial region; the optical imaging lens comprises at least one aspheric lens and one spherical lens. The optical imaging lens has the advantages of large aperture, high resolution, good thermal stability and small aperture.
Description
Technical Field
The present invention relates to the field of imaging lens technology, and in particular, to an optical imaging lens and an imaging device.
Background
With the development of automatic driving technology, ADAS (Advanced Driver assistance System) has become the standard of automobiles; the vehicle-mounted camera lens is used as a key device of the ADAS, can sense the surrounding road conditions of the vehicle in real time, realizes the functions of forward collision early warning, lane deviation warning, pedestrian detection and the like, and directly influences the safety coefficient of the ADAS due to the performance of the vehicle-mounted camera lens, so that the performance requirement on the vehicle-mounted camera lens is higher and higher.
The ADAS system has extremely high requirements on the carried vehicle-mounted lens, firstly requires strong light transmission capability, can adapt to the change of brightness of the external environment, simultaneously requires the lens to have higher imaging definition, can effectively distinguish the details of the road environment, and simultaneously requires the lens to have good distinguishing capability on objects (such as traffic signal lamps, road identification information and the like) which emit or reflect monochromatic light with different wavelengths so as to meet the special requirements of an intelligent driving system. However, most lenses in the existing market do not meet the above requirements well.
Disclosure of Invention
Therefore, an object of the present invention is to provide an optical imaging lens and an imaging apparatus having advantages of a large aperture, a high resolving power, a good thermal stability, and a small aperture.
The embodiment of the invention implements the above object by the following technical scheme.
In a first aspect, the present invention provides an optical imaging lens, comprising, in order from an object side to an imaging plane along an optical axis: a first lens having a negative optical power, the first lens having concave object and image side surfaces; the second lens is provided with positive focal power, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; a diaphragm; a third lens having a positive optical power, the third lens having convex object and image side surfaces; the fourth lens is provided with negative focal power, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a concave surface; the lens comprises a fifth lens with positive focal power, wherein both the object-side surface and the image-side surface of the fifth lens are convex surfaces; a sixth lens having a optical power, an object-side surface of the sixth lens being convex at a paraxial region, an image-side surface of the sixth lens being concave at a paraxial region; the optical imaging lens comprises at least one aspheric lens and at least one spherical lens.
In a second aspect, the present invention provides an imaging apparatus, including an imaging element and the optical imaging lens provided in the first aspect, wherein the imaging element is configured to convert an optical image formed by the optical imaging lens into an electrical signal.
Compared with the prior art, the optical imaging lens and the imaging device provided by the invention have the advantages that the first lens and the second lens which are arranged in front of the diaphragm are both glass aspheric lenses, so that light rays can enter the lens more slowly, the distortion of the lens is favorably improved, and the front end aperture of the lens is effectively reduced; the sixth lens adopts a glass aspheric lens, so that light rays can smoothly enter an imaging surface, the spherical aberration and astigmatism of the lens can be improved, and the imaging quality of the lens can be improved; third lens and fifth lens are biconvex lens and all adopt the glass material that refractive index temperature coefficient is less than zero, have better compensation effect to the high and low temperature focus position offset of lens, and all lens all use the glass material simultaneously, make the camera lens have good thermal stability, make to be applicable to the harsher field of environment, the demand in fields such as unmanned aerial vehicle, security protection control, on-vehicle control.
In conclusion, the optical imaging lens disclosed by the invention adopts a design of six glass spherical and aspherical lenses, and the focal power and surface type collocation of each lens are reasonably distributed, so that the lens has the advantages of small aperture, large aperture and good thermal stability while realizing good imaging quality.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an optical imaging lens according to a first embodiment of the present invention;
FIG. 2 is an MTF chart of an optical imaging lens according to a first embodiment of the present invention;
FIG. 3 is a graph illustrating axial chromatic aberration of an optical imaging lens according to a first embodiment of the present invention;
FIG. 4 is a vertical axis chromatic aberration diagram of the optical imaging lens according to the first embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an optical imaging lens according to a second embodiment of the present invention;
FIG. 6 is an MTF chart of an optical imaging lens according to a second embodiment of the present invention;
FIG. 7 is a graph of axial chromatic aberration of an optical imaging lens according to a second embodiment of the present invention;
FIG. 8 is a vertical axis chromatic aberration diagram of an optical imaging lens according to a second embodiment of the present invention;
FIG. 9 is a schematic structural diagram of an optical imaging lens system according to a third embodiment of the present invention;
FIG. 10 is an MTF chart of an optical imaging lens according to a third embodiment of the present invention;
FIG. 11 is a graph of axial chromatic aberration of an optical imaging lens according to a third embodiment of the present invention;
FIG. 12 is a vertical axis chromatic aberration diagram of an optical imaging lens according to a third embodiment of the present invention;
fig. 13 is a schematic configuration diagram of an image forming apparatus according to a fourth embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Like reference numerals refer to like elements throughout the specification.
The invention provides an optical imaging lens, which sequentially comprises the following components from an object side to an imaging surface along an optical axis: the lens comprises a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens, a sixth lens, an optical filter and protective glass.
The first lens has negative focal power, the object side surface of the first lens is a concave surface, and the image side surface of the first lens is a concave surface;
the second lens has positive focal power, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface;
the third lens has positive focal power, and both the object side surface and the image side surface of the third lens are convex surfaces;
the fourth lens has negative focal power, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a concave surface;
the fifth lens has positive focal power, and both the object side surface and the image side surface of the fifth lens are convex surfaces;
the sixth lens has positive focal power or negative focal power, the object-side surface of the sixth lens is convex at a paraxial region, and the image-side surface of the sixth lens is concave at the paraxial region;
the optical filter can be used to selectively filter portions of the light to optimize the imaging results.
In some embodiments, in order to improve the resolution of the lens and effectively reduce the vertical axis chromatic aberration of the lens, the optical imaging lens adopts a plurality of aspheric lenses, and the use of the aspheric lenses can better correct the aberration of the lens, improve the resolution of the lens and enable the imaging to be clearer. The first lens, the second lens and the sixth lens are all aspheric lenses, and the third lens, the fourth lens and the fifth lens are all spherical lenses; other combinations of spherical and aspherical surface combinations that achieve the imaging effect are also possible.
In some embodiments, the optical imaging lens satisfies the following conditional expression:
-10<R11/f<0；（1）
1<R12/f<2.5；（2）
-0.5<SAG11/SAG12<-0.1；（3）
wherein SAG11 denotes an edge rise of an object side surface of the first lens, SAG12 denotes an edge rise of an image side surface of the first lens, R11 denotes a radius of curvature of the object side surface of the first lens, R12 denotes a radius of curvature of the image side surface of the first lens, and f denotes an effective focal length of the optical imaging lens. Satisfy above-mentioned conditional expression (1) - (3), through setting up first lens and being biconcave lens, make the light distribution that gets into first lens more even, be favorable to the light deflection angle of rational distribution camera lens front end, realize the wide visual angle of camera lens.
In some embodiments, the optical imaging lens satisfies the following conditional expression:
0.1<(φ2-φ6)/φ<0.2；（4）
wherein, phi 2 represents the focal power of the second lens, phi 6 represents the focal power of the sixth lens, and phi represents the focal power of the optical imaging lens. For better correcting the aberration of the system, the second lens and the sixth lens can adopt aspheric lenses, the above conditional expression (4) is satisfied, and the spherical aberration and the coma aberration of the system can be effectively controlled and the resolving power of the lens is improved by reasonably setting the focal power distribution of the second lens and the sixth lens.
In some embodiments, the optical imaging lens satisfies the following conditional expression:
-2×10-5/℃< (dn/dt)3+(dn/dt)5<-8×10-6/℃；（5）
0.3<φ3/φ5<0.8；（6）
wherein (dn/dt)3 represents a temperature coefficient of refractive index of the third lens, (dn/dt)5 represents a temperature coefficient of refractive index of the fifth lens, [ phi ] 3 represents power of the third lens, and [ phi ] 5 represents power of the fifth lens. The third lens and the fifth lens are both double-convex lenses, and bear main positive focal power of the lens, and satisfy the conditional expressions (5) and (6), so that the third lens and the fifth lens are both made of glass materials with refractive index temperature coefficients smaller than zero, the influence of temperature change on the focal length of the lens can be effectively compensated, and the stability of the resolving power of the lens at different temperatures is improved.
In some embodiments, the optical imaging lens satisfies the following conditional expression:
f/ENPD<1.6；（7）
f/DST<0.8；（8）
wherein f represents an effective focal length of the optical imaging lens, ENPD represents an entrance pupil diameter of the optical imaging lens, DSTRepresenting the effective diameter of the diaphragm. Satisfying the above conditional expressions (7) and (8) shows that the lens has the characteristic of large aperture, so that the lens has a large light-entering amount, and can satisfy the imaging requirements in the light and dark environment.
In some embodiments, the optical imaging lens satisfies the following conditional expression:
0.05mm-1<SD11×tan(HFOV)/IH/TTL<0.08mm-1；（9）
wherein SD11 denotes an effective radius of an object-side surface of the first lens, HFOV denotes a maximum half field angle of the optical imaging lens, IH denotes a half of a diagonal length of an effective pixel region on an imaging plane of the optical imaging lens, and TTL denotes an optical total length of the optical imaging lens, that is, an on-axis distance from a center of the object-side surface of the first lens to the imaging plane. The condition (9) is satisfied, the system is ensured to have a larger imaging surface, the system structure is more compact, and the characteristic of small aperture of the system lens is realized.
In some embodiments, the optical imaging lens satisfies the following conditional expression:
-1.5<R12/R21<-0.5；（10）
-1.5<SAG12/SAG21<-1；（11）
where R12 denotes a radius of curvature of the image-side surface of the first lens, R21 denotes a radius of curvature of the object-side surface of the second lens, SAG12 denotes an edge rise of the image-side surface of the first lens, and SAG21 denotes an edge rise of the object-side surface of the second lens. The conditional expressions (10) and (11) are satisfied, so that the light deflection angle between the first lens and the second lens before the diaphragm is favorably and reasonably distributed, the contribution of the first lens and the second lens to system distortion is reasonably controlled, the spherical aberration of the system can be effectively improved, and the imaging quality of the system is improved.
In some embodiments, the fourth lens and the fifth lens form a cemented lens, and the optical imaging lens satisfies the following conditional expression:
-0.5<φ4/φ<-0.2；（12）
0.5<φ5/φ<0.8；（13）
3mm<R45<12mm；（14）
where φ 4 represents the focal power of the fourth lens, φ 5 represents the focal power of the fifth lens, φ represents the focal power of the optical imaging lens, and R45 represents the radius of curvature of the cemented surfaces of the fourth lens and the fifth lens. In order to better correct chromatic aberration of the system, the fourth lens and the fifth lens form a cemented lens, the conditional expressions (12) - (14) are satisfied, and chromatic aberration of the system can be better improved and resolving power of the lens is improved by reasonably setting power distribution of the fourth negative lens and the fifth positive lens.
In some embodiments, the optical imaging lens satisfies the following conditional expression:
0.8<ET6/CT6<0.9；（15）
0.3<SAG61/SAG62<0.6；（16）
where ET6 denotes an edge thickness of the sixth lens, CT6 denotes a center thickness of the sixth lens, SAG61 denotes an edge rise of an object side surface of the sixth lens, and SAG62 denotes an edge rise of an image side surface of the sixth lens. The conditional expressions (15) and (16) are satisfied, the smooth entering and exiting of the light rays are favorably controlled, the edge light rays are converged on the sixth lens, the incident angle of the light rays on the photosensitive chip can be reduced, the off-axis aberration is effectively corrected, and the imaging quality is improved.
In some embodiments, the sixth lens has a positive optical power, and the optical power φ 6 of the sixth lens and the optical power φ of the optical imaging lens satisfy: 0< 6/phi < 0.06.
In other embodiments, the sixth lens may also have a negative focal power, and the focal power Φ 6 of the sixth lens and the focal power Φ of the optical imaging lens satisfy: -0.5< φ 6/φ <0.
The sixth lens adopts positive focal power or negative focal power, so that the system has a good imaging effect, and is specifically determined by combining and matching with other lenses.
In some embodiments, the optical imaging lens satisfies the following conditional expression:
R31+R32=0；（17）
10mm<R31<20mm；（18）
where R31 denotes a radius of curvature of the object-side surface of the third lens, and R32 denotes a radius of curvature of the image-side surface of the third lens. The third lens element can be a biconvex lens with symmetrical double surfaces when the conditional expressions (17) and (18) are satisfied, thereby ensuring the high imaging quality of the system, reducing the difficulty of production and assembly (avoiding the problem that the assembly direction is difficult to distinguish due to the close curvature of the lens assembly), and effectively improving the production yield.
In some embodiments, at least one inflection point exists on both the object-side surface and the image-side surface of the sixth lens, and the surface inclination angle at the maximum inflection point is not more than 5 °, so that the processing difficulty of the sixth lens can be reduced to the greatest extent under the condition of ensuring the imaging quality of the lens, and the manufacturing cost can be reduced.
In some embodiments, in order to enable the lens to have stable imaging performance in high and low temperature environments, the lenses in the optical imaging lens can be made of glass; in order to reduce the production cost of the lens, part of the lenses in the optical imaging lens can also be made of plastic materials, namely, the lens can have good thermal stability by adopting a glass-plastic mixing and matching mode.
The invention is further illustrated below in the following examples. In each embodiment, the thickness, the curvature radius, and the material selection part of each lens in the optical imaging lens are different, and the specific difference can be referred to the parameter table of each embodiment. The following examples are only preferred embodiments of the present invention, but the embodiments of the present invention are not limited only by the following examples, and any other changes, substitutions, combinations or simplifications which do not depart from the innovative points of the present invention should be construed as being equivalent substitutions and shall be included within the scope of the present invention.
In the embodiments of the present invention, when the lenses in the optical imaging lens are aspheric lenses, each aspheric surface type satisfies the following equation:
wherein: z represents the distance of the curved surface from the vertex of the curved surface in the optical axis direction, c represents the curvature of the vertex of the curved surface, K represents a conic coefficient, h represents the distance from the optical axis to the curved surface, and B, C, D, E, F, G, H represents the curved surface coefficients of fourth order, sixth order, eighth order, tenth order, twelfth order, fourteenth order and sixteenth order, respectively.
First embodiment
Please refer to fig. 1, which is a schematic structural diagram of an optical imaging lens 100 according to a first embodiment of the present invention, wherein the optical imaging lens 100 sequentially includes, from an object side to an image plane along an optical axis: the lens comprises a first lens L1, a second lens L2, an aperture stop ST, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter G1 and protective glass G2.
The first lens L1 has negative focal power, the object-side surface S1 of the first lens is a concave surface, and the image-side surface S2 of the first lens is a concave surface;
the second lens L2 has positive focal power, the object-side surface S3 of the second lens is concave, and the image-side surface S4 of the second lens is convex;
the third lens L3 has positive optical power, and both the object-side surface S5 and the image-side surface S6 of the third lens are convex;
the fourth lens L4 has negative focal power, the object-side surface S7 of the fourth lens is a convex surface, and the image-side surface of the fourth lens is a concave surface;
the fifth lens L5 has positive focal power, the object-side surface and the image-side surface S9 of the fifth lens are convex surfaces, the fourth lens L4 and the fifth lens L5 form a cemented lens, and the bonding surface of the cemented lens is S8;
the sixth lens L6 has a negative power, the object-side surface S10 of the sixth lens is convex at the paraxial region, the image-side surface S11 of the sixth lens is concave at the paraxial region, and both the object-side surface S10 and the image-side surface S11 of the sixth lens have a point of inflection, and the surface inclination angle at the maximum point of inflection does not exceed 5 degrees.
The first lens L1, the second lens L2, and the sixth lens L6 are all glass aspheric lenses, and the third lens L3, the fourth lens L4, and the fifth lens L5 are all glass spherical lenses.
Table 1 shows the parameters related to each lens of the optical imaging lens 100 provided in this embodiment.
TABLE 1
The relevant parameters of the aspherical lens of the optical imaging lens 100 in the present embodiment are shown in table 2.
TABLE 2
Referring to fig. 2, which shows the MTF curve of the optical imaging lens 100 according to the first embodiment of the present invention, it can be seen that the MTF values at 119lp/mm are all greater than 0.50 in the full field of view, and when matching with a specific chip (for example, chip size 1/1.7 inch), a higher resolution can be achieved.
Referring to fig. 3 and 4, an axial chromatic aberration curve and a vertical axis chromatic aberration curve of the optical imaging lens 100 according to the first embodiment of the present invention are shown, and it can be seen from fig. 3 that the axial chromatic aberration of the optical imaging lens provided by the present embodiment is within ± 0.015 mm; as can be seen from fig. 4, the vertical chromatic aberration of the longest wavelength and the shortest wavelength in the full field of view is controlled within ± 4 microns, which indicates that the chromatic aberration of the optical imaging lens 100 is well corrected.
Second embodiment
Referring to fig. 5, a schematic structural diagram of an optical imaging lens 200 according to the present embodiment is shown, in which the optical imaging lens 200 in the present embodiment has substantially the same surface type of the lens elements of the optical imaging lens 100 in the first embodiment, but the difference is that: the radius of curvature, thickness of each lens and air space between each lens are different. The parameters of each lens of the optical imaging lens 200 in this embodiment are shown in table 3.
TABLE 3
Relevant parameters of the aspherical lens of the optical imaging lens 200 in the present embodiment are shown in table 4.
TABLE 4
Referring to fig. 6, which shows the MTF curve of the optical imaging lens 200 according to the second embodiment of the present invention, it can be seen that the MTF values at 119lp/mm are all greater than or equal to 0.5 in the full field range, which indicates that the optical imaging lens 200 has higher resolution.
Referring to fig. 7 and 8, which show an axial chromatic aberration curve and a vertical axis chromatic aberration curve of the optical imaging lens 200 according to the second embodiment of the present invention, it can be seen from fig. 7 that the axial chromatic aberration of the optical imaging lens provided in this embodiment is within ± 0.015 mm; as can be seen from fig. 8, the vertical chromatic aberration of the longest wavelength and the shortest wavelength in the full field of view is controlled within ± 3.5 microns, which indicates that the chromatic aberration of the optical imaging lens 200 is well corrected.
Third embodiment
Referring to fig. 9, a schematic structural diagram of an optical imaging lens 300 according to the present embodiment is shown, where the optical imaging lens 300 in the present embodiment is substantially the same as the optical imaging lens 100 in the first embodiment in terms of surface roughness, and the difference is that: the sixth lens L6 has positive power, and there are differences in the radius of curvature, thickness of each lens, and air space between each lens. Table 5 shows the relevant parameters of each lens of the optical imaging lens 300 in this embodiment.
TABLE 5
Relevant parameters of the aspherical lens of the optical imaging lens 300 in the present embodiment are shown in table 6.
TABLE 6
Referring to fig. 10, which shows the MTF curve of the optical imaging lens 300 according to the third embodiment of the present invention, it can be seen that the MTF values at 119lp/mm are all greater than 0.50 in the full field range, which indicates that the optical imaging lens 300 has higher resolution.
Referring to fig. 11 and 12, which show an axial chromatic aberration curve and a vertical axis chromatic aberration curve of the optical imaging lens 300 according to the third embodiment of the present invention, it can be seen from fig. 11 that the axial chromatic aberration of the optical imaging lens provided in this embodiment is within ± 0.015 mm; as can be seen from fig. 12, the vertical chromatic aberration of the longest wavelength and the shortest wavelength in the full field of view is controlled within ± 5 microns, which indicates that the chromatic aberration of the optical imaging lens 300 is well corrected.
Table 7 shows the above 3 embodiments and their corresponding optical characteristics, including the effective focal length F, the F #, the field angle FOV, half IH of the diagonal length of the effective pixel area on the imaging plane, the total optical length TTL, and the values corresponding to each of the foregoing conditional expressions.
TABLE 7
In the optical imaging lens provided by the invention, the first lens and the second lens which are arranged in front of the diaphragm are both glass aspheric lenses, so that light rays can enter the lens more slowly, the distortion of the lens is favorably improved, and the front end aperture of the lens is effectively reduced; the sixth lens of the last lens in the optical imaging lens is a glass aspheric lens, so that light can smoothly enter an imaging surface, the spherical aberration and astigmatism of the lens can be improved, and the imaging quality of the lens can be improved; third lens and fifth lens are biconvex lens and all adopt the glass material that refractive index temperature coefficient is less than zero, have better compensation effect to the high and low temperature focus position offset of lens, and all lens all use the glass material simultaneously, make the camera lens have good thermal stability, make to be applicable to the harsher field of environment, the demand in fields such as unmanned aerial vehicle, security protection control, on-vehicle control. In conclusion, the optical imaging lens disclosed by the invention adopts a design of six glass spherical and aspherical lenses, and the focal power and surface type collocation of each lens are reasonably distributed, so that the lens has the characteristics of small aperture, large aperture, good thermal stability and the like while realizing good imaging quality.
Fourth embodiment
Referring to fig. 13, an imaging device 400 according to a fourth embodiment of the present invention is shown, where the imaging device 400 may include an imaging element 410 and an optical imaging lens (e.g., the optical imaging lens 100) in any of the embodiments described above. The imaging element 410 may be a CMOS (Complementary Metal Oxide Semiconductor) image sensor, and may also be a CCD (Charge Coupled Device) image sensor.
This imaging device 400 can be the electronic equipment who has loaded above-mentioned optical imaging lens of on-vehicle supervisory equipment, security protection equipment, AR/VR equipment, unmanned aerial vehicle and any other form.
The imaging apparatus 400 provided by the present embodiment includes the optical imaging lens 100, and since the optical imaging lens 100 has advantages of a large aperture, a high resolution, good thermal stability, and a small aperture, the imaging apparatus 400 having the optical imaging lens 100 also has advantages of a large aperture, a high resolution, good thermal stability, and a small aperture.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. An optical imaging lens, comprising, in order from an object side to an imaging surface along an optical axis:
a first lens having a negative optical power, the first lens having concave object and image side surfaces;
the second lens is provided with positive focal power, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface;
a diaphragm;
a third lens having a positive optical power, the third lens having convex object and image side surfaces;
the fourth lens is provided with negative focal power, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a concave surface;
the lens comprises a fifth lens with positive focal power, wherein both the object-side surface and the image-side surface of the fifth lens are convex surfaces;
a sixth lens having a optical power, an object-side surface of the sixth lens being convex at a paraxial region, an image-side surface of the sixth lens being concave at a paraxial region;
the optical imaging lens comprises at least one aspheric lens and at least one spherical lens;
the optical imaging lens meets the following conditional expression:
0.1<(φ2-φ6)/φ<0.2；
wherein φ 2 represents the focal power of the second lens, φ 6 represents the focal power of the sixth lens, and φ represents the focal power of the optical imaging lens.
2. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following conditional expression:
-10<R11/f<0；
1<R12/f<2.5；
-0.5<SAG11/SAG12<-0.1；
wherein SAG11 represents an edge rise of an object side surface of the first lens, SAG12 represents an edge rise of an image side surface of the first lens, R11 represents a radius of curvature of the object side surface of the first lens, R12 represents a radius of curvature of the image side surface of the first lens, and f represents an effective focal length of the optical imaging lens.
3. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following conditional expression:
-2×10-5/℃< (dn/dt)3+(dn/dt)5<-8×10-6/℃；
0.3<φ3/φ5<0.8；
wherein (dn/dt)3 represents a temperature coefficient of refractive index of the third lens, (dn/dt)5 represents a temperature coefficient of refractive index of the fifth lens, [ phi ] 3 represents optical power of the third lens, and [ phi ] 5 represents optical power of the fifth lens.
4. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following conditional expression:
f/ENPD<1.6；
f/DST<0.8；
wherein f represents an effective focal length of the optical imaging lens, ENPD represents an entrance pupil diameter of the optical imaging lens, DSTRepresenting the effective diameter of the diaphragm.
5. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following conditional expression:
0.05mm-1<SD11×tan(HFOV)/IH/TTL<0.08mm-1；
wherein SD11 denotes an effective radius of an object side surface of the first lens, HFOV denotes a maximum half field angle of the optical imaging lens, IH denotes a half of a diagonal length of an effective pixel region on an imaging plane of the optical imaging lens, and TTL denotes an optical total length of the optical imaging lens.
6. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following conditional expression:
-1.5<R12/R21<-0.5；
-1.5<SAG12/SAG21<-1；
wherein R12 represents the radius of curvature of the image-side surface of the first lens, R21 represents the radius of curvature of the object-side surface of the second lens, SAG12 represents the edge rise of the image-side surface of the first lens, and SAG21 represents the edge rise of the object-side surface of the second lens.
7. The optical imaging lens according to claim 1, wherein the fourth lens and the fifth lens constitute a cemented lens, and the optical imaging lens satisfies the following conditional expression:
-0.5<φ4/φ<-0.2；
0.5<φ5/φ<0.8；
3mm<R45<12mm；
where Φ 4 denotes an optical power of the fourth lens, Φ 5 denotes an optical power of the fifth lens, Φ denotes an optical power of the optical imaging lens, and R45 denotes a radius of curvature of a cemented surface of the fourth lens and the fifth lens.
8. The optical imaging lens according to claim 1, characterized in that the optical imaging lens satisfies the following conditional expression:
0.8<ET6/CT6<0.9；
0.3<SAG61/SAG62<0.6；
where ET6 represents the edge thickness of the sixth lens, CT6 represents the center thickness of the sixth lens, SAG61 represents the edge SAGs of the object side of the sixth lens, and SAG62 represents the edge SAGs of the image side of the sixth lens.
9. The optical imaging lens of claim 1, wherein the sixth lens has a positive optical power, and the optical power φ 6 of the sixth lens and the optical power φ of the optical imaging lens satisfy: 0< 6/phi < 0.06.
10. The optical imaging lens of claim 1, wherein the sixth lens has a negative power, and the power of the sixth lens φ 6 and the power of the optical imaging lens φ satisfies: -0.5< φ 6/φ <0.
11. The optical imaging lens according to claim 1, wherein the first lens, the second lens and the sixth lens are all glass aspheric lenses, and the third lens, the fourth lens and the fifth lens are all glass spherical lenses.
12. An imaging apparatus comprising the optical imaging lens according to any one of claims 1 to 11 and an imaging element for converting an optical image formed by the optical imaging lens into an electric signal.
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| CN113960773B (en) * | 2021-12-22 | 2022-05-24 | 江西联创电子有限公司 | Optical imaging lens and imaging apparatus |
| CN114428390B (en) * | 2022-04-06 | 2022-08-26 | 江西联益光学有限公司 | Wide-angle lens and imaging apparatus |
| CN115236840B (en) * | 2022-09-22 | 2023-03-24 | 江西联创电子有限公司 | Optical lens |
| CN116577914B (en) * | 2023-07-13 | 2023-11-14 | 江西联创电子有限公司 | optical lens |
| CN116719152B (en) * | 2023-08-09 | 2023-12-05 | 江西联益光学有限公司 | optical lens |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005227569A (en) * | 2004-02-13 | 2005-08-25 | Nagano Kogaku Kenkyusho:Kk | Two-group zoom lens |
| CN101359087A (en) * | 2007-08-02 | 2009-02-04 | 鸿富锦精密工业（深圳）有限公司 | Wide-angle lens and vehicle apparatus using the wide-angle lens |
| CN107957618A (en) * | 2017-12-22 | 2018-04-24 | 江西联创电子有限公司 | On-vehicle lens |
| CN108227152A (en) * | 2018-03-20 | 2018-06-29 | 嘉兴中润光学科技有限公司 | Big field angle pin hole imaging optical system |
| JP2018136583A (en) * | 2018-06-11 | 2018-08-30 | マクセル株式会社 | Imaging lens system and imaging apparatus |
| CN108490584A (en) * | 2018-05-09 | 2018-09-04 | 江西联创电子有限公司 | Optical imaging lens |
| CN112596215A (en) * | 2021-03-02 | 2021-04-02 | 江西联益光学有限公司 | Optical lens and imaging apparatus |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002162562A (en) * | 2000-11-27 | 2002-06-07 | Casio Comput Co Ltd | Photographic lens |
| JP2007279632A (en) * | 2006-04-12 | 2007-10-25 | Matsushita Electric Ind Co Ltd | Super wide angle lens |
| JP5402015B2 (en) * | 2008-03-04 | 2014-01-29 | 株式会社ニコン | Rear focus optical system, imaging apparatus, and focusing method of rear focus optical system |
| CN101587231B (en) * | 2009-06-09 | 2011-02-02 | 宁波舜宇车载光学技术有限公司 | Megapixels large aperture vehicle front view lens |
| CN103605200B (en) * | 2013-10-30 | 2016-03-30 | 宁波舜宇车载光学技术有限公司 | A kind of optical lens |
| CN105204143B (en) * | 2015-10-14 | 2017-07-07 | 浙江舜宇光学有限公司 | Bugeye lens |
| TWI586999B (en) * | 2015-10-23 | 2017-06-11 | 大立光電股份有限公司 | Imaging lens assembly, image capturing unit and electronic device |
| CN109445067B (en) * | 2018-11-23 | 2020-05-29 | 江西联创电子有限公司 | Optical imaging lens and imaging apparatus |
| CN113391435B (en) * | 2021-08-17 | 2022-02-11 | 江西联益光学有限公司 | Optical lens |
| CN113960773B (en) * | 2021-12-22 | 2022-05-24 | 江西联创电子有限公司 | Optical imaging lens and imaging apparatus |
-
2021
- 2021-12-22 CN CN202111581744.3A patent/CN113960773B/en active Active
-
2022
- 2022-11-08 WO PCT/CN2022/130566 patent/WO2023116241A1/en unknown
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005227569A (en) * | 2004-02-13 | 2005-08-25 | Nagano Kogaku Kenkyusho:Kk | Two-group zoom lens |
| CN101359087A (en) * | 2007-08-02 | 2009-02-04 | 鸿富锦精密工业（深圳）有限公司 | Wide-angle lens and vehicle apparatus using the wide-angle lens |
| CN107957618A (en) * | 2017-12-22 | 2018-04-24 | 江西联创电子有限公司 | On-vehicle lens |
| CN108227152A (en) * | 2018-03-20 | 2018-06-29 | 嘉兴中润光学科技有限公司 | Big field angle pin hole imaging optical system |
| CN108490584A (en) * | 2018-05-09 | 2018-09-04 | 江西联创电子有限公司 | Optical imaging lens |
| JP2018136583A (en) * | 2018-06-11 | 2018-08-30 | マクセル株式会社 | Imaging lens system and imaging apparatus |
| CN112596215A (en) * | 2021-03-02 | 2021-04-02 | 江西联益光学有限公司 | Optical lens and imaging apparatus |
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