CN110412752A - Wide-angle lens - Google Patents
Wide-angle lens Download PDFInfo
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- CN110412752A CN110412752A CN201910844407.5A CN201910844407A CN110412752A CN 110412752 A CN110412752 A CN 110412752A CN 201910844407 A CN201910844407 A CN 201910844407A CN 110412752 A CN110412752 A CN 110412752A
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- negative power
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- 239000000571 coke Substances 0.000 claims abstract description 21
- 230000003287 optical effect Effects 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 10
- 230000000694 effects Effects 0.000 abstract description 6
- 238000003384 imaging method Methods 0.000 description 5
- 238000005286 illumination Methods 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
Abstract
The present invention relates to a kind of wide-angle lens, including what is be arranged successively along optical axis from object side to image side: the first lens (L1) with negative power, the second lens (L2) with negative power, the third lens (L3) with negative power, diaphragm (STOP), the 4th lens (L4) with positive light coke, the 5th lens (L5), the 6th lens (L6) with negative power and the 7th lens (L7) with positive light coke with positive light coke；5th lens (L5) and the glued composition of the 6th lens (L6) have the balsaming lens group of negative power.Camera lens of the invention can satisfy the small in size, requirement such as not empty coke in -40 DEG C~85 DEG C temperature ranges, while the relative luminance of picture is high, high resolution, and shooting effect is good.
Description
Technical field
The present invention relates to optical imaging field more particularly to a kind of wide-angle lens.
Background technique
It is higher and higher to optical lens resolution requirement with the fast development of science and technology.Major part currently on the market is wide
Angle mirror head can not have both small size and no thermalization under the premise of meeting fine definition.Therefore, the present invention is directed to be directed to above not
Foot proposes a solution, provide it is a kind of it is small in size, in -40 DEG C~85 DEG C temperature ranges it is not empty it is burnt, clarity is reachable
Wide-angle lens more than 20000000 pixels.
Summary of the invention
The purpose of the present invention is to solve the above problem, provides a kind of wide-angle lens.
To achieve the above object, the present invention provides a kind of wide-angle lens, including is arranged successively along optical axis from object side to image side
: the first lens with negative power, the second lens with negative power, the third lens with negative power, diaphragm,
The 4th lens with positive light coke, the 5th lens with positive light coke, the 6th lens with negative power and have just
7th lens of focal power；
5th lens and the 6th lens glue are combined into the balsaming lens group with negative power.
According to an aspect of the present invention, first lens are male-female lens, and second lens are male-female lens,
The third lens are concave-convex lens, and the 4th lens are convex-convex lens, and the 5th lens are convex-convex lens, described
6th lens are concave-concave lens, and the 7th lens are convex-convex lens.
According to an aspect of the present invention, first lens, the 4th lens, the 5th lens and the described 6th
Lens are spherical lens；
Second lens, the third lens and the 7th lens are non-spherical lens.
It according to an aspect of the present invention, further include chip protection glass, the chip protection glass is located at the described 7th
Between lens and image planes.
According to an aspect of the present invention, the focal length of the balsaming lens group of the 5th lens and the 6th lens composition
The effective focal length f of fb and camera lens meets relational expression: -3.4≤fb/f≤- 2.9.
According to an aspect of the present invention, the effective focal length f of camera lens and the first lens object side to image planes distance D
Meet relational expression: f/D >=0.14.
According to an aspect of the present invention, the effective focal length f of camera lens and half image height h meet relational expression: f/h≤0.75.
According to an aspect of the present invention, rear lens focus d meets with the first lens object side to image planes distance D and closes
It is formula: d/D >=0.19.
According to an aspect of the present invention, the chief ray angle CRA of the maximum field of view of camera lens meets relational expression: CRA≤
17°。
According to an aspect of the present invention, in the 4th lens, the 5th lens and the 7th lens at least
The relative index of refraction temperature coefficient dn/dt of one piece of lens meets following relationship: dn/dt≤0.
According to an aspect of the present invention, the material of at least two pieces lens is low dispersion, and Abbe VD is full
Sufficient following relationship: VD >=60.
A scheme according to the present invention, by distribute rationally each lens concavity and convexity and positive negative power, make picture
Difference is effectively corrected.And it can be realized the wide angle picture catching at 134 ° of horizontal field of view angle.
The focal length fb and camera lens of the balsaming lens group of a scheme according to the present invention, the 5th lens and the 6th lens composition
Effective focal length f meet relational expression: -3.4≤fb/f≤- 2.9.The effective focal length f of camera lens and the first lens object side are to image planes
Distance D meet relational expression: f/D >=0.14.The effective focal length f of camera lens and half image height h meet relational expression: f/h≤0.75.Camera lens
Coke d meets relational expression to image planes distance D with the first lens object side afterwards: d/D >=0.19.The chief ray of the maximum field of view of camera lens
Angle CRA meets relational expression: CRA≤17 °.So that camera lens image planes height is up to Φ 8.0mm, and CRA≤17 °, can be adapted to a plurality of
Sensor has a extensive future, and improves the market competitiveness.
A scheme according to the present invention is arranged in pairs or groups using spherical surface and aspherical lens, and the 4th lens L4, the 5th lens
The relative index of refraction temperature coefficient dn/dt of at least one piece lens meets following relationship in L5 and the 7th lens L7: dn/dt≤
0.It may make camera lens to can be realized the not empty coke in -40 DEG C~85 DEG C temperature ranges, be applicable to varying environment.And it can realize
20000000 or more high-resolution, whole uniform-illumination, brightness height (60% or more relative illumination).And camera lens overall length is in 18.5mm
Within, the big disadvantage of existing such camera lens volume is overcome, and camera lens list component and assembling tolerance are preferable, there is good manufacture
Property.
A scheme according to the present invention, the material of at least two pieces lens is low dispersion in camera lens, and Abbe number
Value VD meets following relationship: VD >=60.Be conducive to optics correction color difference, realize high-resolution.
Detailed description of the invention
Fig. 1 is the structure chart for schematically showing the wide-angle lens of embodiment according to the present invention one；
Fig. 2 is the MTF figure for schematically showing the wide-angle lens of embodiment according to the present invention one；
Fig. 3 is to schematically show that the frequency of the wide-angle lens of embodiment according to the present invention one is 225lp/mm
Through-Focus-MTF figure；
Fig. 4 is to schematically show the wide-angle lens of embodiment according to the present invention one at 85 DEG C of high temperature, and frequency is
The Through-Focus-MTF of 225lp/mm schemes；
Fig. 5 is to schematically show the wide-angle lens of embodiment according to the present invention one at -40 DEG C of low temperature, and frequency is
The Through-Focus-MTF of 225lp/mm；
Fig. 6 is the structure chart for schematically showing the wide-angle lens of embodiment according to the present invention two；
Fig. 7 is the MTF figure for schematically showing the wide-angle lens of embodiment according to the present invention two；
Fig. 8 is to schematically show that the frequency of the wide-angle lens of embodiment according to the present invention two is 225lp/mm
Through-Focus-MTF figure；
Fig. 9 is to schematically show the wide-angle lens of embodiment according to the present invention two at 85 DEG C of high temperature, and frequency is
The Through-Focus-MTF of 225lp/mm schemes；
Figure 10 is to schematically show the wide-angle lens of embodiment according to the present invention two at -40 DEG C of low temperature, and frequency is
The Through-Focus-MTF of 225lp/mm；
Figure 11 is the structure chart for schematically showing the wide-angle lens of embodiment according to the present invention three；
Figure 12 is the MTF figure for schematically showing the wide-angle lens of embodiment according to the present invention three；
Figure 13 is to schematically show that the frequency of the wide-angle lens of embodiment according to the present invention three is 225lp/mm
Through-Focus-MTF figure；
Figure 14 is to schematically show the wide-angle lens of embodiment according to the present invention three at 85 DEG C of high temperature, and frequency is
The Through-Focus-MTF of 225lp/mm schemes；
Figure 15 is to schematically show the wide-angle lens of embodiment according to the present invention three at -40 DEG C of low temperature, and frequency is
The Through-Focus-MTF of 225lp/mm；
Figure 16 is the structure chart for schematically showing the wide-angle lens of embodiment according to the present invention four；
Figure 17 is the MTF figure for schematically showing the wide-angle lens of embodiment according to the present invention four；
Figure 18 is to schematically show that the frequency of the wide-angle lens of embodiment according to the present invention four is 225lp/mm
Through-Focus-MTF figure；
Figure 19 is to schematically show the wide-angle lens of embodiment according to the present invention four at 85 DEG C of high temperature, and frequency is
The Through-Focus-MTF of 225lp/mm schemes；
Figure 20 is to schematically show the wide-angle lens of embodiment according to the present invention four at -40 DEG C of low temperature, and frequency is
The Through-Focus-MTF of 225lp/mm；
Figure 21 is the structure chart for schematically showing the wide-angle lens of embodiment according to the present invention five；
Figure 22 is the MTF figure for schematically showing the wide-angle lens of embodiment according to the present invention five；
Figure 23 is to schematically show that the frequency of the wide-angle lens of embodiment according to the present invention five is 225lp/mm
Through-Focus-MTF figure；
Figure 24 is to schematically show the wide-angle lens of embodiment according to the present invention five at 85 DEG C of high temperature, and frequency is
The Through-Focus-MTF of 225lp/mm schemes；
Figure 25 is to schematically show the wide-angle lens of embodiment according to the present invention five at -40 DEG C of low temperature, and frequency is
The Through-Focus-MTF of 225lp/mm.
Specific embodiment
It, below will be to embodiment in order to illustrate more clearly of embodiment of the present invention or technical solution in the prior art
Needed in attached drawing be briefly described.It should be evident that the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skills without creative efforts, can also be according to these
Attached drawing obtains other attached drawings.
When being described for embodiments of the present invention, term " longitudinal direction ", " transverse direction ", "upper", "lower", " preceding ",
" rear ", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", orientation or positional relationship expressed by "outside" are based on phase
Orientation or positional relationship shown in the drawings is closed, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore above-mentioned term cannot
It is interpreted as limitation of the present invention.
The present invention is described in detail with reference to the accompanying drawings and detailed description, embodiment cannot go to live in the household of one's in-laws on getting married one by one herein
It states, but therefore embodiments of the present invention are not defined in following implementation.
Fig. 1 is the structure chart for schematically showing wide-angle lens according to an embodiment of the present invention.As shown in Figure 1, this
The wide-angle lens of invention, including what is be arranged successively along optical axis from object side to image side: there is the first lens L1 of negative power, have
The second lens L2, the third lens L3 with negative power, diaphragm STOP, the 4th lens with positive light coke of negative power
L4, the 5th lens L5, the 6th lens L6 with negative power and the 7th lens with positive light coke with positive light coke
L7.Wherein the 5th lens L5 and the 6th lens L6 gluing composition have the balsaming lens group of negative power.
In the present invention, the first lens L1 be male-female lens, the second lens L2 be male-female lens, the third lens L3 be it is recessed-
Convex lens, the 4th lens L4 be convex-convex lens, the 5th lens L5 be convex-convex lens, the 6th lens L6 be concave-concave lens, the 7th
Lens L7 is convex-convex lens.
In the present invention, the first lens L1, the 4th lens L4, the 5th lens L5 and the 6th lens L6 are spherical lens.Second
Lens L2, the third lens L3 and the 7th lens L7 are non-spherical lens.
In the present invention, further include chip (sensor) protection glass CG, chip protection glass CG be located at the 7th lens L7 and
Between image planes.
In addition, focal length fb (i.e. the 5th lens L5 and the of the balsaming lens group of the 5th lens L5 and the 6th lens L6 composition
The combined focal length of six lens L6) with the effective focal length f of camera lens meet relational expression: -3.4≤fb/f≤- 2.9.Effective coke of camera lens
Meet relational expression to image planes distance D with the first lens L1 object side away from f: f/D >=0.14.The effective focal length f and half picture of camera lens
High h meets relational expression: f/h≤0.75.Rear lens focus d (i.e. the distance of the 7th lens L7 image side surface to image planes) and the first lens L1
The distance D of object side to image planes meets relational expression: d/D >=0.19.The chief ray angle CRA of the maximum field of view of camera lens meets relationship
Formula: CRA≤17 °.
In the present invention, the relative of at least one piece lens in the 4th lens L4, the 5th lens L5 and the 7th lens L7
Rate temperature coefficient dn/dt meets following relationship: dn/dt≤0.
In the present invention, spherical lens is glass material, and non-spherical lens can may be plastic cement material for glass material
Matter, but the material of at least two pieces lens is low dispersion in camera lens, and Abbe VD meets following relationship: VD >=
60。
By above-mentioned design, camera lens of the present invention can realize 20,000,000 or more high-resolution, whole uniform-illumination, brightness height
(60% or more relative illumination).By distributing the positive negative power of each lens rationally, correct aberration effectively.And
Image planes height is up to Φ 8.0mm, and CRA≤17 °, can be adapted to a plurality of sensor, have a extensive future, improve market competition
Power.And can be realized the not empty coke in -40 DEG C~85 DEG C temperature ranges, it is applicable to varying environment.It can be realized level simultaneously
134 ° of field angle of wide angle picture catching.Also, camera lens overall length of the present invention overcomes existing such camera lens within 18.5mm
Bulky disadvantage, and camera lens list component and assembling tolerance are preferable, there is good manufacturing.
It is according to the present invention wide to illustrate to provide five groups of specific embodiments below according to above-mentioned setting of the invention
Angle mirror head.Because wide-angle lens according to the present invention shares seven lens, wherein the 5th lens L5 and the 6th lens L6 constitutes glue
Lens set is closed, so seven lens have 17 faces altogether along with diaphragm STOP, chip protection glass CG and image planes IMAGE.This 17
A face structural order according to the invention is arranged successively arrangement, and for the ease of narration explanation, 17 faces are numbered as S1 to S17,
Wherein the S7 where diaphragm face is replaced with STO, and S11 is the cemented surface of the 5th lens L5 and the 6th lens L6, and S0 is object plane, thick
Degree is object distance size.In addition, in the following embodiments, non-spherical lens face type meets following formula:
In formula, z be the height along optical axis direction, perpendicular to optical axis be at the position of h curved surface to the axial distance on vertex；c
Indicate the curvature of non-spherical surface apex；K is circular cone coefficient；A4, A6, A8, A10, A12, A14, A16 are respectively indicated
Quadravalence, six ranks, eight ranks, ten ranks, ten second orders, ten quadravalences, 16 rank asphericity coefficients.
Data in five groups of embodiment data such as the following table 1:
Table 1
Fig. 1 is the structure chart for schematically showing the wide-angle lens of embodiment according to the present invention one.One base of embodiment
It is illustrated in optical system structure shown in FIG. 1.
Embodiment one:
F number (i.e. the inverse of relative aperture) is 2.6；Camera lens overall length is 18mm；Field angle is 155 °.
Table 2 is the parameter list of embodiment one, including surface type, radius of curvature, thickness, the refractive index of material, Abbe
Number:
| Face serial number | Surface type | R value | Thickness | Refractive index | Abbe number |
| S0(OBJ) | Spherical surface | Infinity | 1200 | ||
| S1 | Spherical surface | 11.5340 | 0.6 | 1.76 | 54.7 |
| S2 | Spherical surface | 3.2841 | 1.2359 | ||
| S3 | It is aspherical | 5.1293 | 0.7 | 1.53 | 81.6 |
| S4 | It is aspherical | 3.5258 | 1.4687 | ||
| S5 | It is aspherical | -8.2887 | 0.94 | 1.75 | 45.1 |
| S6 | It is aspherical | -19.0567 | 0.9624 | ||
| STO | Spherical surface | Infinity | 0.0972 | ||
| S8 | Spherical surface | 31.4914 | 2.02 | 1.53 | 54.7 |
| S9 | Spherical surface | -3.3727 | 0.9197 | ||
| S10 | Spherical surface | 9.8426 | 2.27 | 1.46 | 80.2 |
| S11 | Spherical surface | -3.5012 | 0.5 | 1.78 | 30.1 |
| S12 | Spherical surface | 7.9529 | 0.0978 | ||
| S13 | It is aspherical | 16.8904 | 2.6121 | 1.56 | 71.6 |
| S14 | It is aspherical | -14.5389 | 2.6477 | ||
| S15 | Spherical surface | Infinity | 0.5 | 1.52 | 64.2 |
| S16 | Spherical surface | Infinity | 0.778 | ||
| S17 | Spherical surface | Infinity | - | - | - |
Table 2
In the present embodiment, aspherical surface data is as shown in table 3 below, in table K be the surface quadratic surface constant, A, B,
C, D, E, F, G be respectively quadravalence, six ranks, eight ranks, ten ranks, ten second orders, ten quadravalences, 16 ranks asphericity coefficient:
Table 3
Fig. 2 to Fig. 5 is the MTF figure for schematically showing the wide-angle lens of embodiment according to the present invention one respectively；According to
The Through-Focus-MTF that the frequency of the wide-angle lens of embodiments of the present invention one is 225lp/mm schemes；According to the present invention
Embodiment one wide-angle lens at 85 DEG C of high temperature, the Through-Focus-MTF that frequency is 225lp/mm schemes；According to this hair
For the wide-angle lens of bright embodiment one at -40 DEG C of low temperature, frequency is the Through-Focus-MTF of 225lp/mm.
By the preferred above parameter value, the camera lens of present embodiment realizes small size, high-resolution characteristic, and can
It realizes without thermalization, there is the characteristic of not empty coke within the temperature range of -40 DEG C to 85 DEG C.It can meet excellent under different temperatures environment
Imaging effect, the market competitiveness is high.
Fig. 6 is the structure chart for schematically showing the wide-angle lens of embodiment according to the present invention two.Embodiment diyl
It is illustrated in optical system structure shown in fig. 6.
Embodiment two:
F number is 2.6；Camera lens overall length is 17.5mm；Field angle is 155 °.
Table 4 is two parameter list of embodiment, including surface type, radius of curvature, thickness, the refractive index of material, Abbe number:
| Face serial number | Surface type | R value | Thickness | Refractive index | Abbe number |
| S0(OBJ) | Spherical surface | Infinity | Infinity | ||
| S1 | Spherical surface | 11.52 | 1.1899 | 1.7 | 56.2 |
| S2 | Spherical surface | 3.0957 | 1.2235 | ||
| S3 | It is aspherical | 7.4381 | 0.3838 | 1.5 | 64.8 |
| S4 | It is aspherical | 2.6448 | 1.4768 | ||
| S5 | It is aspherical | -6.3769 | 0.9724 | 1.86 | 36.6 |
| S6 | It is aspherical | -7.8151 | 0.8773 | ||
| STO | Spherical surface | Infinity | 0.0996 | ||
| S8 | Spherical surface | 20.5905 | 2.0212 | 1.73 | 54.7 |
| S9 | Spherical surface | -3.2709 | 0.6531 | ||
| S10 | Spherical surface | 9.2036 | 2.0652 | 1.46 | 90.2 |
| S11 | Spherical surface | -3.1449 | 0.5070 | 1.70 | 30.1 |
| S12 | Spherical surface | 7.777 | 0.1421 | ||
| S13 | It is aspherical | 6.6802 | 2.0486 | 1.46 | 90.2 |
| S14 | It is aspherical | -4.3224 | 2.6344 | ||
| S15 | Spherical surface | Infinity | 0.5 | 1.52 | 64.2 |
| S16 | Spherical surface | Infinity | 0.878 | ||
| S17 | Spherical surface | Infinity | - | - | - |
Table 4
In the present embodiment, aspherical surface data is as shown in table 5 below, in table K be the surface quadratic surface constant, A, B,
C, D, E, F, G be respectively quadravalence, six ranks, eight ranks, ten ranks, ten second orders, ten quadravalences, 16 ranks asphericity coefficient:
Table 5
Fig. 7 to Figure 10 is the MTF figure for schematically showing the wide-angle lens of embodiment according to the present invention two respectively；According to
The Through-Focus-MTF that the frequency of the wide-angle lens of embodiments of the present invention two is 225lp/mm schemes；According to the present invention
Embodiment two wide-angle lens at 85 DEG C of high temperature, the Through-Focus-MTF that frequency is 225lp/mm schemes；According to this hair
For the wide-angle lens of bright embodiment two at -40 DEG C of low temperature, frequency is the Through-Focus-MTF of 225lp/mm.
By the preferred above parameter value, the camera lens of present embodiment realizes small size, high-resolution characteristic, and can
It realizes without thermalization, there is the characteristic of not empty coke within the temperature range of -40 DEG C to 85 DEG C.It can meet excellent under different temperatures environment
Imaging effect, the market competitiveness is high.
Figure 11 is the structure chart for schematically showing the wide-angle lens of embodiment according to the present invention three.Three base of embodiment
The optical system structure shown in Figure 11 is illustrated.
Embodiment three:
F number is 2.8；Camera lens overall length is 18.34mm；Field angle is 150 °.
Table 6 is the parameter list of embodiment three, including surface type, radius of curvature, thickness, the refractive index of material, Abbe
Number:
Table 6
In the present embodiment, aspherical surface data is as shown in table 7 below, in table K be the surface quadratic surface constant, A, B,
C, D, E, F, G be respectively quadravalence, six ranks, eight ranks, ten ranks, ten second orders, ten quadravalences, 16 ranks asphericity coefficient:
Table 7
Figure 12 to Figure 15 is the MTF figure for schematically showing the wide-angle lens of embodiment according to the present invention three respectively；Root
The Through-Focus-MTF that frequency according to the wide-angle lens of embodiments of the present invention three is 225lp/mm schemes；According to this hair
At 85 DEG C of high temperature, the Through-Focus-MTF that frequency is 225lp/mm schemes the wide-angle lens of bright embodiment three；According to this
For the wide-angle lens of the embodiment three of invention at -40 DEG C of low temperature, frequency is the Through-Focus-MTF of 225lp/mm.
By the preferred above parameter value, the camera lens of present embodiment realizes small size, high-resolution characteristic, and can
It realizes without thermalization, there is the characteristic of not empty coke within the temperature range of -40 DEG C to 85 DEG C.It can meet excellent under different temperatures environment
Imaging effect, the market competitiveness is high.
Figure 16 is the structure chart for schematically showing the wide-angle lens of embodiment according to the present invention four.Four base of embodiment
The optical system structure shown in Figure 16 is illustrated.
Embodiment four:
F number is 2.4；Camera lens overall length is 18.0mm；Field angle is 130 °.
Table 8 is the parameter list of embodiment four, including surface type, radius of curvature, thickness, the refractive index of material, Abbe
Number:
| Face serial number | Surface type | R value | Thickness | Refractive index | Abbe number |
| S0(OBJ) | Spherical surface | Infinity | Infinity | ||
| S1 | Spherical surface | 9.0033 | 1.5226 | 1.68 | 54.7 |
| S2 | Spherical surface | 3.1541 | 1.3385 | ||
| S3 | It is aspherical | 6.3632 | 0.6 | 1.49 | 91.0 |
| S4 | It is aspherical | 2.4842 | 1.7232 | ||
| S5 | It is aspherical | -5.8092 | 1.1229 | 1.86 | 38.3 |
| S6 | It is aspherical | -8.3514 | 1.1106 | ||
| STO | Spherical surface | Infinity | 0.6194 | ||
| S8 | Spherical surface | 21.0573 | 1.2930 | 1.73 | 54.7 |
| S9 | Spherical surface | -3.6117 | 0.1537 | ||
| S10 | Spherical surface | 9.1881 | 2.0590 | 1.46 | 90.2 |
| S11 | Spherical surface | -3.0700 | 0.6011 | 1.70 | 30.1 |
| S12 | Spherical surface | 7.9661 | 0.1531 | ||
| S13 | It is aspherical | 7.4825 | 1.9994 | 1.50 | 81.6 |
| S14 | It is aspherical | -4.7257 | 2.8259 | ||
| S15 | Spherical surface | Infinity | 0.5 | 1.52 | 64.2 |
| S16 | Spherical surface | Infinity | 0.3780 | ||
| S17 | Spherical surface | Infinity | - | - | - |
Table 8
In the present embodiment, aspherical surface data is as shown in table 9 below, in table K be the surface quadratic surface constant, A, B,
C, D, E, F, G be respectively quadravalence, six ranks, eight ranks, ten ranks, ten second orders, ten quadravalences, 16 ranks asphericity coefficient:
Table 9
Figure 17 to Figure 20 is the MTF figure for schematically showing the wide-angle lens of embodiment according to the present invention four respectively；Root
The Through-Focus-MTF that frequency according to the wide-angle lens of embodiments of the present invention four is 225lp/mm schemes；According to this hair
At 85 DEG C of high temperature, the Through-Focus-MTF that frequency is 225lp/mm schemes the wide-angle lens of bright embodiment four；According to this
For the wide-angle lens of the embodiment four of invention at -40 DEG C of low temperature, frequency is the Through-Focus-MTF of 225lp/mm.
By the preferred above parameter value, the camera lens of present embodiment realizes small size, high-resolution characteristic, and can
It realizes without thermalization, there is the characteristic of not empty coke within the temperature range of -40 DEG C to 85 DEG C.It can meet excellent under different temperatures environment
Imaging effect, the market competitiveness is high.
Figure 21 is the structure chart for schematically showing the wide-angle lens of embodiment according to the present invention five.Five base of embodiment
The optical system structure shown in Figure 21 is illustrated.
Embodiment five:
F number is 2.6；Camera lens overall length is 18.2mm；Field angle is 170 °.
Table 10 is the parameter list of embodiment five, including surface type, radius of curvature, thickness, the refractive index of material, Abbe
Number:
Table 10
In the present embodiment, aspherical surface data is as shown in table 11 below, in table K be the surface quadratic surface constant, A,
B, C, D, E, F, G be respectively quadravalence, six ranks, eight ranks, ten ranks, ten second orders, ten quadravalences, 16 ranks asphericity coefficient:
Table 11
Figure 22 to Figure 25 is the MTF figure for schematically showing the wide-angle lens of embodiment according to the present invention five respectively；Root
The Through-Focus-MTF that frequency according to the wide-angle lens of embodiments of the present invention five is 225lp/mm schemes；According to this hair
At 85 DEG C of high temperature, the Through-Focus-MTF that frequency is 225lp/mm schemes the wide-angle lens of bright embodiment five；According to this
For the wide-angle lens of the embodiment five of invention at -40 DEG C of low temperature, frequency is the Through-Focus-MTF of 225lp/mm.
By the preferred above parameter value, the camera lens of present embodiment realizes small size, high-resolution characteristic, and can
It realizes without thermalization, there is the characteristic of not empty coke within the temperature range of -40 DEG C to 85 DEG C.It can meet excellent under different temperatures environment
Imaging effect, the market competitiveness is high.
The foregoing is merely an embodiment of the invention, are not intended to restrict the invention, for this field
For technical staff, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (11)
1. a kind of wide-angle lens, which is characterized in that including what is be arranged successively along optical axis from object side to image side: with negative power
First lens (L1), the second lens (L2) with negative power, the third lens (L3) with negative power, diaphragm
(STOP), the 4th lens (L4) with positive light coke, the 5th lens (L5) with positive light coke, with negative power
Six lens (L6) and the 7th lens (L7) with positive light coke；
5th lens (L5) and the glued composition of the 6th lens (L6) have the balsaming lens group of negative power.
2. wide-angle lens according to claim 1, which is characterized in that first lens (L1) are male-female lens, described
Second lens (L2) are male-female lens, and the third lens (L3) are concave-convex lens, and the 4th lens (L4) are convex-convex lens
Mirror, the 5th lens (L5) are convex-convex lens, and the 6th lens (L6) are concave-concave lens, and the 7th lens (L7) are
Convex-convex lens.
3. wide-angle lens according to claim 2, which is characterized in that first lens (L1), the 4th lens
(L4), the 5th lens (L5) and the 6th lens (L6) are spherical lens；
Second lens (L2), the third lens (L3) and the 7th lens (L7) are non-spherical lens.
4. wide-angle lens according to claim 3, which is characterized in that further include chip protection glass (CG), the chip
Protect glass (CG) between the 7th lens (L7) and image planes.
5. according to claim 1 to wide-angle lens described in one of 4, which is characterized in that the 5th lens (L5) and described the
The focal length fb of balsaming lens group and the effective focal length f of camera lens of six lens (L6) composition meet relational expression: -3.4≤fb/f≤-
2.9。
6. according to claim 1 to wide-angle lens described in one of 4, which is characterized in that the effective focal length f of camera lens and described first
The distance D of lens (L1) object side to image planes meets relational expression: f/D >=0.14.
7. according to claim 1 to wide-angle lens described in one of 4, which is characterized in that the effective focal length f of camera lens and half image height h
Meet relational expression: f/h≤0.75.
8. according to claim 1 to wide-angle lens described in one of 4, which is characterized in that rear lens focus d and first lens
(L1) the distance D of object side to image planes meets relational expression: d/D >=0.19.
9. according to claim 1 to wide-angle lens described in one of 4, which is characterized in that the chief ray angle of the maximum field of view of camera lens
Degree CRA meets relational expression: CRA≤17 °.
10. according to claim 1 to wide-angle lens described in one of 4, which is characterized in that the 4th lens (L4), described
The relative index of refraction temperature coefficient dn/dt of at least one piece lens meets following in five lens (L5) and the 7th lens (L7)
Relational expression: dn/dt≤0.
11. according to claim 1 to wide-angle lens described in one of 4, which is characterized in that the material of at least two pieces lens is low
Dispersive glass, and Abbe VD meets following relationship: VD >=60.
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| CN201910844407.5A CN110412752A (en) | 2019-09-06 | 2019-09-06 | Wide-angle lens |
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| CN201910844407.5A CN110412752A (en) | 2019-09-06 | 2019-09-06 | Wide-angle lens |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112987246A (en) * | 2019-12-17 | 2021-06-18 | 三星电机株式会社 | Imaging lens system |
| WO2021121004A1 (en) * | 2019-12-18 | 2021-06-24 | 江西联创电子有限公司 | Wide-angle lens and imaging device |
| WO2023001017A1 (en) * | 2021-07-21 | 2023-01-26 | 东莞市宇瞳光学科技股份有限公司 | Fixed-focus lens |
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| WO2023001017A1 (en) * | 2021-07-21 | 2023-01-26 | 东莞市宇瞳光学科技股份有限公司 | Fixed-focus lens |
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