CN105353499B - A kind of optical lens - Google Patents
A kind of optical lens Download PDFInfo
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- CN105353499B CN105353499B CN201510737516.9A CN201510737516A CN105353499B CN 105353499 B CN105353499 B CN 105353499B CN 201510737516 A CN201510737516 A CN 201510737516A CN 105353499 B CN105353499 B CN 105353499B
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- lens
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- optical lens
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- object space
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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
-
- 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
-
- 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
-
- 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
- G02B13/005—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having spherical lenses only
Abstract
The invention discloses a kind of optical lens.The optical lens successively includes having positive light coke and convex surface is towards the first lens of object space, convex surface towards the second lens of falcate of object space, the third lens of bi-concave shape, the 4th lens, the 5th lens and the 6th lens with positive light coke from the object side to the image side.For optical lens provided by the invention while realizing high-resolution, small distortion, large aperture, miniaturization, focal length is relatively long, and field range reduces, and is conducive under identical image planes size cases, more preferable to observe object space details, meets the needs of for small field of view observation.
Description
Technical field
The present invention relates to optical image technology field more particularly to a kind of optical lens.
Background technique
With the development of auto industry active safety, the requirement to vehicle-mounted front view lens is continuously improved.One side forward sight phase
Machine is monitored for road surface, driving assistance system, while not only needing the clarity for guaranteeing observation picture compared with high-resolution, also
It needs to meet small distortion requirement, reduces distortion deformation degree.On the other hand, portion requirements such as automobile data recorder etc., mainly
For objects in front, road conditions details, have to observation visual field it is required, meanwhile, need to avoid because of excessive visual field, occur in picture
The objects such as the in-vehicle apparatus other than road conditions.Existing Chinese patent literature CN204229034U uses the optical system of 5 lens
System, though various aspects of performance is preferable, lens focus is shorter, and whole visual field is larger, for the need in terms of resolution surface conditions details
It asks and is lacking, while promoting improved space there are still further in the solution image space face of distortion, high-frequency region.
Summary of the invention
The present invention proposes a kind of optical lens, while realizing high-resolution, small distortion, large aperture, miniaturization, has length
Focal length can reduce field range, be conducive under identical image planes size cases, preferably observation object space details, meet for small
The demand of visual field observation.
To achieve this purpose, the present invention adopts the following technical scheme:
A kind of optical lens, successively include from the object side to the image side there is positive light coke and convex surface towards object space first thoroughly
Mirror, convex surface towards the second lens of falcate of object space, the third lens of bi-concave shape, the 4th lens with positive light coke,
5th lens and the 6th lens.
Wherein, first lens are meniscus shaped lens or biconvex lens of the convex surface towards object space.
Wherein, the 5th lens are the biconvex lens with positive light coke, and the 6th lens are with negative power
Biconcave lens, the 5th lens and the 6th lens group are at balsaming lens；Or
5th lens are with positive light coke and convex surface is towards the lens of object space, and the 6th lens are with negative light
The biconcave lens of focal power, the 5th lens and the 6th lens are not glued；Or
5th lens are with negative power and convex surface is towards the lens of object space, and the 6th lens are with positive light
Focal power and concave surface is towards the lens of image space, the 5th lens and the 6th lens group are at balsaming lens；Or
5th lens are with negative power and convex surface is towards the lens of object space, and the 6th lens are with positive light
Focal power and be lens of the concave surface towards image space, the 5th lens and the 6th lens are not glued.
Wherein, the optical lens further includes a diaphragm, and the diaphragm is located between two lens of arbitrary neighborhood.
Wherein, first lens meet 0.5≤F1/F≤8.0, and F1 is the focal length value of the first lens, and F is the optics
The whole group focal length value of camera lens.
Wherein, second lens meet 0.7 < r3/r4 < 1.4, and r3 is the radius value of the second lens object side direction, r4
It is the radius value in the second lens image side direction.
Wherein, second lens meet Nd >=1.7, and Nd is the refractive index of the material of the second lens.
Wherein, second lens meet | F2/F | >=4.0, F2 are the focal length values of the second lens, and F indicates the optical frames
The whole group focal length value of head.
Wherein, the optical length of the optical lens meets TTL/F≤4.5, and TTL indicates that the optics of the optical lens is long
Degree, F indicate the whole group focal length value of the optical lens.
Wherein, whole lens of the optical lens be glass spherical lens or the optical lens at least one thoroughly
Mirror is glass aspheric lenses.
A kind of optical lens provided by the invention, successively includes with positive light coke from the object side to the image side and convex surface is towards object
First lens of side, convex surface towards object space falcate the second lens, the third lens of bi-concave shape, with positive light coke
4th lens, the 5th lens and the 6th lens.Optical lens provided by the invention is realizing high-resolution, small distortion, large aperture, small
While type, focal length can be longer, and true field range is smaller, is conducive to meet under identical image planes size cases, more preferably
Object space details is observed, meets the needs of for small field of view observation.
Detailed description of the invention
Fig. 1 a is a kind of structural schematic diagram of optical lens of the embodiment of the present invention two.
Fig. 1 b is the MTF resolution curve of the optical lens of Fig. 1 a.
Fig. 1 c is the astigmatism curve graph of the camera lens of Fig. 1 a.
Fig. 1 d is the distortion curve of the optical lens of Fig. 1 a.
Fig. 2 a is a kind of structural schematic diagram of optical lens of the embodiment of the present invention three.
Fig. 2 b is the MTF resolution curve of the optical lens of Fig. 2 a.
Fig. 2 c is the astigmatism curve graph of the optical lens of Fig. 2 a.
Fig. 2 d is the distortion curve of the optical lens of Fig. 2 a.
Fig. 3 a is a kind of structural schematic diagram of optical lens of the embodiment of the present invention four.
Fig. 3 b is the MTF resolution curve of the optical lens of Fig. 3 a.
Fig. 3 c is the astigmatism curve graph of the optical lens of Fig. 3 a.
Fig. 3 d is the distortion curve of the optical lens of Fig. 3 a.
Fig. 4 a is a kind of structural schematic diagram of optical lens of the embodiment of the present invention five.
Fig. 4 b is the MTF resolution curve of the optical lens of Fig. 4 a.
Fig. 4 c is the astigmatism curve graph of the optical lens of Fig. 4 a.
Fig. 4 d is the distortion curve of the optical lens of Fig. 4 a.
Fig. 5 a is a kind of structural schematic diagram of optical lens of the embodiment of the present invention six.
Fig. 5 b is the MTF resolution curve of optical lens in Fig. 5 a.
Fig. 5 c is the astigmatism curve graph of the optical lens of Fig. 5 a.
Fig. 5 d is the distortion curve of the optical lens of Fig. 5 a.
Fig. 6 a is a kind of structural schematic diagram of optical lens of the embodiment of the present invention seven.
Fig. 6 b is the MTF resolution curve of the optical lens of Fig. 6 a.
Fig. 6 c is the astigmatism curve graph of the optical lens of Fig. 6 a.
Fig. 6 d is the distortion curve of the optical lens of Fig. 6 a.
Fig. 7 a is a kind of structural schematic diagram of optical lens of the embodiment of the present invention eight.
Fig. 7 b is the MTF resolution curve of the optical lens of Fig. 7 a.
Fig. 7 c is the astigmatism curve graph of the optical lens of Fig. 7 a.
Fig. 7 d is the distortion curve of the optical lens of Fig. 7 a.
Specific embodiment
Below in conjunction with attached drawing, pass through specific embodiment to further illustrate the technical scheme of the present invention.
Embodiment one
A kind of optical lens, successively include from the object side to the image side there is positive light coke and convex surface towards object space the first lens
L1, convex surface towards the second lens L2 of falcate of object space, the third lens L3 of bi-concave shape, the with positive light coke the 4th thoroughly
Mirror L4, the 5th lens L5 and the 6th lens L6.
5th lens L5 and the 6th lens L6 necessarily require positive light coke.
First lens L1 meets following formula:
0.5≤F1/F≤8.0
Wherein, F1 is the focal length value of the first lens L1, and F indicates the whole group focal length value of optical lens.
First lens L1 has positive light coke, can converge object space light, can effectively correct entire optical system
Aberration, realizes the high pixel and small distortion of optical lens, and has elongated the whole focal length of camera lens to a certain extent, reduces visual field model
It encloses, is conducive under identical image planes size cases, preferably observation object space details, can simultaneously be effectively correct entire optical system
Aberration, realize the high pixel and small distortion of optical lens, not only contribute to high frequency spatial solution picture rise, also help shortening
Length through camera lens entirety realizes the requirement of miniaturization, so that the aberration of whole system and size reach a preferable balance.
Second lens L2 meets following formula:
0.7 < r3/r4 < 1.4
Nd≥1.7
|F2/F|≥4.0
Wherein, r3 is the radius value of the second lens L2 object side direction, and r4 is the radius value in the second image side lens L2 direction, Nd
It is the refractive index of the material of the second lens L2, F2 is the focal length value of the second lens L2.
Second lens L2 uses the material of high refractive index, while such shape, the limitation of curvature and low light are carried out to it
The configuration of focal power, so that the collection light of angle as big as possible and converge light, so that the bore of the third lens is reduced,
And guarantee the large aperture performance of the optical lens, be conducive to light smooth transition.
The optical length of the optical lens meets TTL/F≤4.5, and TTL indicates the optical length of the optical lens, institute
The distance of imaging focal plane for stating the object space side outermost point of the first lens L1 of optical lens to the optical lens is optical frames
The optical length of head.
The optical length of optical lens and the restriction of whole group focal length value ratio can be realized wanting for optical lens miniaturization
It asks.
Whole lens of the optical lens are that at least one lens of glass spherical lens or optical lens are glass
Glass non-spherical lens.All eyeglasses are all made of glass spheric glass, are able to achieve the requirement of high-resolution, with reduce optical lens at
This；The stability of glass material is conducive to still keep solution as that clearly, can guarantee -40 in different temperatures variation range simultaneously
DEG C~+85 DEG C within the temperature range of still keep more perfect imaging definition, especially suitable for taking into account day and night or lighting condition
Poor monitoring and in-vehicle camera system.But if the quality requirements such as more high-resolution are reached, aspherical lens or part can be used
Realize that the optical properties such as solution picture are further promoted using aspherical lens；In the not high situation of operating temperature requirements, modeling can also be used
Expect that material replaces, the cost of aspherical lens is reduced, in this regard, the present invention is without limitation.
Optical lens provided in an embodiment of the present invention successively includes having positive light coke and convex surface direction from the object side to the image side
First lens L1 of object space, convex surface towards object space falcate the second lens L2, the third lens L3 of bi-concave shape, have
The 4th lens L4, the 5th lens L5 and the 6th lens L6 of positive light coke.Optical lens provided by the invention realize high-resolution,
While small distortion, large aperture, miniaturization, focal length is longer, and field range is smaller, is conducive under identical image planes size cases,
Object space details is preferably observed, meets the needs of for small field of view observation.
Following embodiment two is the preferred embodiment of the present embodiment, embodiment two to embodiment eight to embodiment eight
Not yet detailed content please refers to the present embodiment.
Embodiment two
Fig. 1 a is a kind of structural schematic diagram for optical lens that embodiment of the present invention provides.The optical lens, from object
Side successively includes: the first lens L1, the second lens L2, aperture member L7, the third lens L3, the 4th lens L4, the 5th to image space
Lens L5, the 6th lens L6, colour filter IR, sheet glass CG and imaging surface IMA.Wherein, the first lens L1 is with positive light
Towards the lens of object space, the second lens L2 is that the falcate of the convex surface with positive light coke towards object space is saturating for focal power and convex surface
Mirror, the third lens L3 are biconcave lens, and the 4th lens L4 has positive light coke, and the 5th lens L5 is with just
The biconvex lens of focal power, the 6th lens L6 are the biconcave lens with negative power, the 5th lens L5 and the 6th
Lens L6 forms a balsaming lens.
First lens L1 has positive light coke, can converge object space light, can effectively correct entire optical system
Aberration, realizes the high pixel and small distortion of optical lens, and has elongated camera lens whole focal length to a certain extent, reduces visual field model
It encloses, is conducive under identical image planes size cases, it is more preferable to observe object space details, can simultaneously be effectively correct entire optical system
Aberration realizes the high pixel and small distortion of optical lens, this solution picture for not only contributing to high frequency spatial rises, and also helps shortening
The length of camera lens entirety, realizes the requirement of miniaturization, so that the aberration of whole system and size reach a preferable balance.
Since object space, successively the face of each element is numbered, the first lens L1 includes mirror surface S1 and mirror surface S2, and
Two lens L2 include mirror surface S3 and mirror surface S4, and the face S5 of diaphragm L7, the third lens L3 include mirror surface S6 and mirror surface S7, the 4th lens
L4 includes mirror surface S8 and mirror surface S9, the 5th lens L5 include mirror surface S10 and mirror surface S11, and the 6th lens L6 includes mirror surface S11 and mirror
Face S12, colour filter IR include face S13 and face S14, the two sides S15 and S16 of sheet glass.In addition to S5, in the S1-S15 and following table
Face serial number correspond, STO indicates the face of diaphragm in following table.
As a kind of preferred embodiment of the present embodiment, diaphragm L7 can be placed between two lens of arbitrary neighborhood, this hair
The bright position to diaphragm L7 is without limitation.
Following table is the parameter of the system of the optical lens of the present embodiment:
According to above-mentioned data, the parameter values for calculating the optical lens of the present embodiment are as follows:
| F1/F | r3/r4 | F2/F | TTL/F |
| 1.85 | 1.08 | 73.18 | 1.89 |
R3 is the radius value of the second lens object L2 side direction, and r4 is the radius value in the second image side lens L2 direction, and Nd is
The refractive index of the material of two lens L2, F are the whole group focal length values of optical lens, and F1 is the focal length value of the first lens L1, and F2 is
The focal length value of two lens L2, TTL indicate the optical length of optical lens.
Second lens L2 has low power, is conducive to light from the second lens L2 smooth transition.
Second lens L2 uses the material of high refractive index, while such shape, curvature limitation are carried out to it so as to the greatest extent may be used
Can wide-angle collection light and light is converged, to reduce the bore of the third lens, be conducive to small form factor requirements, protect
Demonstrate,prove the large aperture performance of the optical lens.
Fig. 1 b-d is the optical performance curve figure of the present embodiment.Wherein Fig. 1 b is the MTF solution of the optical lens of Fig. 1 a as bent
Line；Fig. 1 c is the astigmatism curve graph of the optical lens of Fig. 1 a, is indicated by the wavelength of common three coloured light, unit mm；Fig. 1 d
It is the distortion curve of the optical lens of Fig. 1 a, indicates the distortion sizes values after normalizing in the case of different field angles, unit
For %.By Fig. 1 b it is found that solution picture frequency rate is at 60lp/mm, center MTF is still close to 0.8, and curve is relatively concentrated, and solution is as higher, figure
Three curves essentially coincide in 1d, by Fig. 1 d it is found that camera lens integrally distort it is smaller, less than 5%.Fig. 1 b-d has embodied the optics
Camera lens has preferable optical property.
The f-number of optical lens is FNO, field angle FOV, FOV=37 °, FNO=1.6, F=11.06mm, TTL=
20.91mm.The present embodiment field range is smaller, and focal length is relatively long, meets front view lens small field of view range observation object detail
Requirement.
Embodiment three
The present embodiment and the main distinction of embodiment two are that lens materials selection is different in the present embodiment, the second lens
Focal power it is different.
As shown in Figure 2 a, a kind of optical lens successively includes: the first lens L1, the second lens L2, light from the object side to the image side
Late element L7, the third lens L3, the 4th lens L4, the 5th lens L5, the 6th lens L6, colour filter IR, sheet glass CG and imaging
Face IMA.Wherein, the first lens L1 is with positive light coke and convex surface is towards the lens of object space, and the second lens L2 is
Towards the meniscus shaped lens of object space, the third lens L3 is that the concave-concave with negative power is saturating on convex surface with negative power
Mirror, the 4th lens L4 have a positive light coke, and the 5th lens L5 is the lenticular lens with positive light coke, and described the
Six lens L6 are the biconcave lens with negative power, and the 5th lens L5 and the 6th lens L6 form a balsaming lens.
Since object space, successively the face of each element is numbered, the first lens L1 includes mirror surface S1 and mirror surface S2, and
Two lens L2 include mirror surface S3 and mirror surface S4, and the face S5 of diaphragm L7, the third lens L3 include mirror surface S6 and mirror surface S7, the 4th lens
L4 includes mirror surface S8 and mirror surface S9, the 5th lens L5 include mirror surface S10 and mirror surface S11, and the 6th lens L6 includes mirror surface S11 and mirror
Face S12, colour filter IR include face S13 and face S14, the two sides S15 and S16 of sheet glass.In addition to S5, in the S1-S15 and following table
Face serial number correspond, STO indicates the face of diaphragm in following table.
Diaphragm L7 can be placed between two lens of arbitrary neighborhood, the present invention to its position without limitation.
Following table is the parameter of the system of the optical lens of the present embodiment:
According to above-mentioned data, the parameter values for calculating the optical lens of the present embodiment are as follows:
| F1/F | r3/r4 | F2/F | TTL/F |
| 2.00 | 1.16 | -19.5 | 1.82 |
R3 is the radius value of the second lens L2 object side direction, and r4 is the radius value in the second image side lens L2 direction, and Nd is
The refractive index of the material of two lens L2, F are the whole group focal length values of optical lens, and F1 is the focal length value of the first lens L1, and F2 is
The focal length value of two lens L2, TTL indicate the optical length of optical lens.
Fig. 2 b-d is the optical performance curve figure of the present embodiment.Wherein Fig. 2 b is the MTF solution of the optical lens of Fig. 2 a as bent
Line；Fig. 2 c is the astigmatism curve graph of the optical lens of Fig. 2 a, is indicated by the wavelength of common three coloured light, unit mm；Fig. 2 d
It is the distortion curve of the optical lens of Fig. 2 a, indicates the distortion sizes values after normalizing in the case of different field angles, unit
For %.By Fig. 2 b it is found that the present embodiment solution picture frequency rate is at 60lp/mm, center MTF is still close to 0.85, and curve is relatively concentrated, solution
As higher；Three curves essentially coincide in Fig. 2 d, by Fig. 2 d it is found that camera lens integrally distort it is smaller, less than 5%.Fig. 2 b-d embodies
The optical lens is gone out with preferable optical property.
The f-number of optical lens is FNO, field angle FOV, FOV=37 °, FNO=1.8, F=11.09mm, TTL=
20.22mm.The present embodiment field range is smaller, and focal length is relatively long, meets front view lens small field of view range observation object detail
Requirement.
Example IV
The present embodiment and the main distinction of embodiment two are that lens materials selection is different, and the gluing in the present embodiment is thoroughly
Mirror combined situation is different.
Fig. 3 a is a kind of structural schematic diagram for optical lens that embodiment of the present invention provides.The optical lens, from object
Side successively includes: the first lens L1, the second lens L2, aperture member L7, the third lens L3, the 4th lens L4, the 5th to image space
Lens L5, the 6th lens L6, colour filter IR, sheet glass CG and imaging surface IMA.Wherein, the first lens L1 is with positive light
Towards the lens of object space, the second lens L2 is that the falcate of the convex surface with positive light coke towards object space is saturating for focal power and convex surface
Mirror, the third lens L3 be the biconcave lens with negative power, the 4th lens L4 have positive light coke, the described 5th
Lens L5 is with negative power and convex surface is towards the lens of object space, and the 6th lens L6 is with positive light coke and concave surface court
To the lens of image space, the 5th lens L5 and the 6th lens L6 form a balsaming lens.
Since object space, successively the face of each element is numbered, the first lens L1 includes mirror surface S1 and mirror surface S2, and
Two lens L2 include mirror surface S3 and mirror surface S4, and the face S5 of diaphragm L7, the third lens L3 include mirror surface S6 and mirror surface S7, the 4th lens
L4 includes mirror surface S8 and mirror surface S9, the 5th lens L5 include mirror surface S10 and mirror surface S11, and the 6th lens L6 includes mirror surface S11 and mirror
Face S12, colour filter IR include face S13 and face S14, the two sides S15 and S16 of sheet glass.In addition to S5, in the S1-S15 and following table
Face serial number correspond, STO indicates the face of diaphragm in following table.
As a kind of preferred embodiment of the present embodiment, diaphragm L7 can be placed between two lens of arbitrary neighborhood, this hair
The bright position to diaphragm L7 is without limitation.
Following table is the parameter of the system of the optical lens of the present embodiment:
According to above-mentioned data, the numerical value for calculating formula involved in the present embodiment is as follows:
| F1/F | r3/r4 | F2/F | TTL/F |
| 1.46 | 0.97 | 11.34 | 1.58 |
R3 is the radius value of the second lens L2 object side direction, and r4 is the radius value in the second image side lens L2 direction, and Nd is
The refractive index of the material of two lens L2, F are the whole group focal length values of optical lens, and F1 is the focal length value of the first lens L1, and F2 is
The focal length value of two lens L2, TTL indicate the optical length of optical lens.
Fig. 3 b-d is the optical performance curve figure of the present embodiment.Wherein Fig. 3 b is the MTF solution of the optical lens of Fig. 3 a as bent
Line；Fig. 3 c is the astigmatism curve graph of the optical lens of Fig. 3 a, is indicated by the wavelength of common three coloured light, unit mm；Fig. 3 d
It is the distortion curve of the optical lens of Fig. 3 a, indicates the distortion sizes values after normalizing in the case of different field angles, unit
For %.By Fig. 3 b it is found that the present embodiment solution picture frequency rate is at 60lp/mm, center MTF is still close to 0.75, and curve is relatively concentrated, solution
As higher；Three curves essentially coincide in Fig. 3 d, by Fig. 3 d it is found that camera lens integrally distort it is smaller, less than 5%.Fig. 3 b-d embodies
The optical lens is gone out with preferable optical property.
The f-number of optical lens is FNO, field angle FOV, FOV=37 °, FNO=1.7, F=10.91mm, TTL=
17.19mm.The present embodiment field range is smaller, and focal length is relatively long, meets front view lens small field of view range observation object detail
Requirement.
Embodiment five
The present embodiment and the main distinction of embodiment two are that the lens materials in the present embodiment select different, optical system
The 5th lens, the 6th lens in system are not glued.
As shown in fig. 4 a, a kind of optical lens of the present invention, successively include: from the object side to the image side the first lens L1,
Second lens L2, aperture member L7, the third lens L3, the 4th lens L4, the 5th lens L5, the 6th lens L6, colour filter IR, glass
Glass piece CG and imaging surface IMA.Wherein, the first lens L1 be with positive light coke and convex surface towards object space lens, it is described
Second lens L2 is meniscus shaped lens of the convex surface with positive light coke towards object space, and the third lens L3 is with negative light focus
The biconcave lens of degree, the 4th lens L4 have positive light coke, and the 5th lens L5 is with positive light coke and convex surface court
To object space, the 6th lens L6 is with negative power and is biconcave lens, and the 5th lens L5 and the 6th lens L6 is not
It is glued.
Since object space, successively the face of each element is numbered, the first lens L1 includes mirror surface S1 and mirror surface S2, and
Two lens L2 include mirror surface S3 and mirror surface S4, and the face S5 of diaphragm L7, the third lens L3 include mirror surface S6 and mirror surface S7, the 4th lens
L4 includes mirror surface S8 and mirror surface S9, the 5th lens L5 include mirror surface S10 and mirror surface S11, and the 6th lens L6 includes mirror surface S12 and mirror
Face S13, colour filter IR include face S14 and face S15, and sheet glass includes face S16 and S17.In addition to S5, in the S1-S15 and following table
Face serial number correspond, STO indicates the face of diaphragm in following table.
As a kind of preferred embodiment of the present embodiment, diaphragm L7 can be placed between two lens of arbitrary neighborhood, this hair
The bright position to diaphragm L7 is without limitation.
Following table is the parameter of the system of the optical lens of the present embodiment:
According to above-mentioned data, the numerical value for calculating formula involved in the present embodiment is as follows:
| F1/F | r3/r4 | F2/F | TTL/F |
| 1.22 | 0.93 | 13.4 | 1.57 |
R3 is the radius value of the second lens L2 object side direction, and r4 is the radius value in the second image side lens L2 direction, and Nd is
The refractive index of the material of two lens L2, F are the whole group focal length values of optical lens, and F1 is the focal length value of the first lens L1, and F2 is
The focal length value of two lens L2, TTL indicate the optical length of optical lens.
Fig. 4 b-d is the optical performance curve figure of the present embodiment.Wherein Fig. 4 b is the MTF solution of the optical lens of Fig. 4 a as bent
Line；Fig. 4 c is the astigmatism curve graph of the optical lens of Fig. 4 a, is indicated by the wavelength of common three coloured light, unit mm；Fig. 4 d
It is the distortion curve of the optical lens of Fig. 4 a, indicates the distortion sizes values after normalizing in the case of different field angles, unit
For %.By Fig. 4 b it is found that solution picture frequency rate is at 60lp/mm, center MTF is still close to 0.9, and curve is relatively concentrated, and solution is as higher；Figure
Three curves essentially coincide in 4d, by Fig. 4 d it is found that camera lens integrally distort it is smaller, less than 5%.Fig. 4 b-d has embodied the optics
Camera lens has preferable optical property.
The f-number of optical lens is FNO, field angle FOV, FOV=39 °, FNO=1.8, F=11.51mm, TTL=
18.01mm.The present embodiment field range is smaller, and focal length is relatively long, meets front view lens small field of view range observation object detail
Requirement.
Embodiment six
The present embodiment and the main distinction of embodiment two are that the lens materials in the present embodiment select different, optical system
The 5th lens, the 6th lens in system are not glued.
Fig. 5 a is a kind of structural schematic diagram for optical lens that the specific embodiment of the invention provides.The optical lens,
Successively include: from the object side to the image side the first lens L1, the second lens L2, aperture member L7, the third lens L3, the 4th lens L4,
5th lens L5, the 6th lens L6, colour filter IR, sheet glass CG and imaging surface IMA.Wherein, the first lens L1 be with
Towards the lens of object space, the second lens L2 is bent moon of the convex surface with positive light coke towards object space for positive light coke and convex surface
Shape lens, the third lens L3 are the biconcave lens with negative power, and the 4th lens L4 has positive light coke, described
5th lens L5 is with negative power and convex surface is towards object space, and the 6th lens L6 is with positive light coke and is concave surface court
To image space, the 5th lens L5 and the 6th lens L6 is not glued.
Since object space, successively the face of each element is numbered, the first lens L1 includes mirror surface S1 and mirror surface S2, and
Two lens L2 include mirror surface S3 and mirror surface S4, and the face S5 of diaphragm L7, the third lens L3 include mirror surface S6 and mirror surface S7, the 4th lens
L4 includes mirror surface S8 and mirror surface S9, the 5th lens L5 include mirror surface S10 and mirror surface S11, and the 6th lens L6 includes mirror surface S12 and mirror
Face S13, colour filter IR include face S14 and face S15, the two sides S15 and S16 of sheet glass.In addition to S5, in the S1-S15 and following table
Face serial number correspond, STO indicates the face of diaphragm in following table.
As a kind of preferred embodiment of the present embodiment, diaphragm L7 can be placed between two lens of arbitrary neighborhood, this hair
The bright position to diaphragm L7 is without limitation.
Following table is the parameter of the system of the optical lens of the present embodiment:
According to above-mentioned data, the numerical value for calculating formula involved in the present embodiment is as follows:
| F1/F | r3/r4 | F2/F | TTL/F |
| 1.70 | 0.96 | 5.94 | 1.47 |
R3 is the radius value of the second lens L2 object side direction, and r4 is the radius value in the second image side lens L2 direction, and Nd is
The refractive index of the material of two lens L2, F are the whole group focal length values of optical lens, and F1 is the focal length value of the first lens L1, and F2 is
The focal length value of two lens L2, TTL indicate the optical length of optical lens.
Fig. 5 b-d is the optical performance curve figure of the present embodiment.Wherein Fig. 5 b is the MTF solution of the optical lens of Fig. 5 a as bent
Line；Fig. 5 c is the astigmatism curve graph of the optical lens of Fig. 5 a, is indicated by the wavelength of common three coloured light, unit mm；Fig. 5 d
It is the distortion curve of the optical lens of Fig. 5 a, indicates the distortion sizes values after normalizing in the case of different field angles, unit
For %.By Fig. 5 b it is found that solution picture frequency rate is at 60lp/mm, center MTF is still close to 0.8, and curve is relatively concentrated, and solution is as higher, figure
Three curves essentially coincide in 5d, by Fig. 5 d it is found that camera lens integrally distort it is smaller, less than 10%.Fig. 5 b-d has embodied the light
Learning camera lens has preferable optical property.
The f-number of optical lens is FNO, field angle FOV, FOV=32 °, FNO=1.8, F=10.40mm, TTL=
15.27mm.The optical lens field range of the present embodiment is smaller, and focal length is relatively long, meets the sight of front view lens small field of view range
Examine the requirement of object detail.
Embodiment seven
The present embodiment and the main distinction of embodiment two are that the lens materials in the present embodiment select different.And the reality
It is whole smaller to apply a camera lens, small chip is cooperated to use.
As shown in Figure 6 a, a kind of optical lens of the present invention, successively include: from the object side to the image side the first lens L1,
Second lens L2, aperture member L7, the third lens L3, the 4th lens L4, the 5th lens L5, the 6th lens L6, colour filter IR, glass
Glass piece CG and imaging surface IMA.Wherein, the first lens L1 be with positive light coke and convex surface towards object space lens, it is described
Second lens L2 is meniscus shaped lens of the convex surface with positive light coke towards object space, and the third lens L3 is with negative light focus
The biconcave lens of degree, the 4th lens L4 have positive light coke, and the 5th lens L5 is the biconvex mirror with positive light coke
Piece, the 6th lens L6 are the concave-concave eyeglass with negative power, and the 5th lens L5 and the 6th lens form a glue
Close lens.
Since object space, successively the face of each element is numbered, the first lens L1 includes mirror surface S1 and mirror surface S2, and
Two lens L2 include mirror surface S3 and mirror surface S4, and the face S5 of diaphragm L7, the third lens L3 include mirror surface S6 and mirror surface S7, the 4th lens
L4 includes mirror surface S8 and mirror surface S9, the 5th lens L5 include mirror surface S10 and mirror surface S11, and the 6th lens L6 includes mirror surface S11 and mirror
Face S12, colour filter IR include face S13 and face S14, the two sides S15 and S16 of sheet glass.In addition to S5, in the S1-S15 and following table
Face serial number correspond, STO indicates the face of diaphragm in following table.
As a kind of preferred embodiment of the present embodiment, diaphragm L7 can be placed between two lens of arbitrary neighborhood, this hair
The bright position to diaphragm L7 is without limitation.
Following table is the parameter of the system of the optical lens of the present embodiment:
According to above-mentioned data, the numerical value for calculating formula involved in the present embodiment is as follows:
| F1/F | r3/r4 | F2/F | TTL/F |
| 7.17 | 1.01 | 15.77 | 3.03 |
R3 is the radius value of the second lens L2 object side direction, and r4 is the radius value in the second image side lens L2 direction, and Nd is
The refractive index of the material of two lens L2, F are the whole group focal length values of optical lens, and F1 is the focal length value of the first lens L1, and F2 is
The focal length value of two lens L2, TTL indicate the optical length of optical lens.
Fig. 6 b-d is the optical performance curve figure of the present embodiment.Wherein Fig. 6 b is the MTF solution of the optical lens of Fig. 6 a as bent
Line；Fig. 6 c is the astigmatism curve graph of the optical lens of Fig. 6 a, is indicated by the wavelength of common three coloured light, unit mm；Fig. 6 d
It is the distortion curve of the optical lens of Fig. 6 a, indicates the distortion sizes values after normalizing in the case of different field angles, unit
For %, three curves are essentially coincided in Fig. 6 d.Fig. 6 b-d has embodied the optical lens with preferable optical property.
The f-number of optical lens is FNO, FNO=1.6, F=3.95mm, TTL=11.98mm.The optics of the present embodiment
Though lens focus is short, small chip is cooperated to use, whole group focal length value is still longer on the whole, can be seen that the light from Fig. 6 b
The field range for learning camera lens is smaller, can satisfy the requirement of front view lens small field of view range observation object detail.
Embodiment eight
The present embodiment and the main distinction of embodiment two are that the lens materials in the present embodiment select difference, and first thoroughly
Mirror shape is different, and the embodiment camera lens is whole smaller, and small chip is cooperated to use.
As shown in Figure 7a, a kind of optical lens of the present invention, successively include: from the object side to the image side the first lens L1,
Second lens L2, aperture member L7, the third lens L3, the 4th lens L4, the 5th lens L5, the 6th lens L6, colour filter IR, glass
Glass piece CG and imaging surface IMA.Wherein, the first lens L1 is the lens of biconvex, and the second lens L2 is with positive light focus
The convex surface of degree towards object space meniscus shaped lens, the third lens L3 be the biconcave lens with negative power, the described 4th
Lens L4 be biconvex eyeglass, the 5th lens L5 be the biconvex eyeglass with positive light coke, the 6th lens L6 be with
The concave-concave eyeglass of negative power, the 5th lens L5 and the 6th lens form a balsaming lens.
Since object space, successively the face of each element is numbered, the first lens L1 includes mirror surface S1 and mirror surface S2, and
Two lens L2 include mirror surface S3 and mirror surface S4, and the face S5 of diaphragm L7, the third lens L3 include mirror surface S6 and mirror surface S7, the 4th lens
L4 includes mirror surface S8 and mirror surface S9, the 5th lens L5 include mirror surface S10 and mirror surface S11, and the 6th lens L6 includes mirror surface S11 and mirror
Face S12, colour filter IR include face S13 and face S14, the two sides S15 and S16 of sheet glass.In addition to S5, in the S1-S15 and following table
Face serial number correspond, STO indicates the face of diaphragm in following table.
As a kind of preferred embodiment of the present embodiment, diaphragm L7 can be placed between two lens of arbitrary neighborhood, this hair
The bright position to diaphragm L7 is without limitation.
Following table is the parameter of the system of the optical lens of the present embodiment:
According to above-mentioned data, the numerical value for calculating formula involved in the present embodiment is as follows:
| F1/F | r3/r4 | F2/F | TTL/F |
| 1.80 | 0.99 | 14.92 | 2.68 |
R3 is the radius value of the second lens L2 object side direction, and r4 is the radius value in the second image side lens L2 direction, and Nd is
The refractive index of the material of two lens L2, F are the whole group focal length values of optical lens, and F1 is the focal length value of the first lens L1, and F2 is
The focal length value of two lens L2, TTL indicate the optical length of optical lens.
Fig. 7 b-d is the optical performance curve figure of the present embodiment.Wherein Fig. 7 b is the MTF solution of the optical lens of Fig. 7 a as bent
Line；Fig. 7 c is the astigmatism curve graph of the optical lens of Fig. 7 a, is indicated by the wavelength of common three coloured light, unit mm；Fig. 7 d
It is the distortion curve of the optical lens of Fig. 7 a, indicates the distortion sizes values after normalizing in the case of different field angles, unit
For %, three curves are essentially coincided in Fig. 7 d.Fig. 7 b-d has embodied the optical lens with preferable optical property.
The f-number of optical lens is FNO, FNO=1.7, F=3.93mm, TTL=10.56mm.The optics of the present embodiment
Though lens focus is short, small chip is cooperated to use, whole group focal length value is still longer on the whole, can be seen that the light from Fig. 7 b
The field range for learning camera lens is smaller, can satisfy the requirement of front view lens small field of view range observation object detail.
For optical lens provided by the invention while realizing high-resolution, small distortion, large aperture, miniaturization, focal length is more
It is long, field range can be reduced, be conducive under identical image planes size cases, preferably observation object space details.
Describe the technical principle of the embodiment of the present invention in conjunction with specific embodiments above, these descriptions are intended merely to explain this
The principle of inventive embodiments, and it cannot be construed to the limitation to protection scope of the embodiment of the present invention in any way, this field
Technical staff does not need to pay for creative labor the other specific embodiments that can associate the embodiment of the present invention, these sides
Formula is fallen within the protection scope of the embodiment of the present invention.
Claims (9)
1. a kind of optical lens, which is characterized in that from the object side to the image side successively include with positive light coke and convex surface is towards object space
The first lens, convex surface is towards the second lens of falcate of object space, the third lens of bi-concave shape, with positive light coke
Four lens, the 5th lens and the 6th lens,
And wherein,
5th lens are the biconvex lens with positive light coke, and the 6th lens are that the concave-concave with negative power is saturating
Mirror, the 5th lens and the 6th lens group are at balsaming lens；Or
5th lens are with positive light coke and convex surface is towards the lens of object space, and the 6th lens are with negative power
Biconcave lens, the 5th lens and the 6th lens are not glued；Or
5th lens are with negative power and convex surface is towards the lens of object space, and the 6th lens are with positive light coke
And concave surface, towards the lens of image space, the 5th lens and the 6th lens group are at balsaming lens；Or
5th lens are with negative power and convex surface is towards the lens of object space, and the 6th lens are with positive light coke
And be lens of the concave surface towards image space, the 5th lens and the 6th lens are not glued.
2. optical lens as described in claim 1, which is characterized in that first lens are falcate of the convex surface towards object space
Lens or biconvex lens.
3. optical lens as described in claim 1, which is characterized in that further include a diaphragm, the diaphragm is located at any phase
Between two adjacent lens.
4. optical lens as described in claim 1, which is characterized in that first lens meet 0.5≤F1/F≤8.0, F1
For the focal length value of the first lens, F is the whole group focal length value of the optical lens.
5. optical lens as described in claim 1, which is characterized in that second lens meet 0.7 < r3/r4 < 1.4, r3
It is the radius value of the second lens object side direction, r4 is the radius value in the second lens image side direction.
6. optical lens as described in claim 1, which is characterized in that second lens meet Nd >=1.7, and Nd is second saturating
The refractive index of the material of mirror.
7. optical lens as described in claim 1, which is characterized in that second lens meet | F2/F | >=4.0, F2 are the
The focal length value of two lens, F indicate the whole group focal length value of the optical lens.
8. optical lens as described in claim 1, which is characterized in that the optical length of the optical lens meet TTL/F≤
4.5, TTL indicate that the optical length of the optical lens, F indicate the whole group focal length value of the optical lens.
9. such as optical lens described in any item of the claim 1 to 8, which is characterized in that whole lens of the optical lens
At least one lens for being glass spherical lens or the optical lens are glass aspheric lenses.
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| CN108873243B (en) * | 2017-05-08 | 2021-01-08 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| JP6709564B2 (en) | 2017-11-01 | 2020-06-17 | カンタツ株式会社 | Imaging lens |
| US10564399B2 (en) * | 2017-12-29 | 2020-02-18 | AAC Technologies Pte. Ltd. | Camera optical lens |
| CN109828355B (en) * | 2018-12-27 | 2021-06-18 | 瑞声光学解决方案私人有限公司 | Image pickup optical lens |
| CN110398816B (en) * | 2019-06-29 | 2021-08-17 | 瑞声光学解决方案私人有限公司 | Image pickup optical lens |
| CN114217414B (en) * | 2021-12-20 | 2023-03-21 | 中国科学院长春光学精密机械与物理研究所 | Low-light-level objective optical system |
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|---|---|---|---|---|
| CN102707416A (en) * | 2012-06-11 | 2012-10-03 | 浙江舜宇光学有限公司 | Micro camera lens |
| CN103558677A (en) * | 2013-11-11 | 2014-02-05 | 舜宇光学(中山)有限公司 | Athermal monitoring camera lens |
| CN104280860A (en) * | 2014-09-18 | 2015-01-14 | 利达光电股份有限公司 | High-resolution camera lens |
| CN104297906A (en) * | 2014-10-20 | 2015-01-21 | 宁波舜宇车载光学技术有限公司 | Optical lens |
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| JP3478265B2 (en) * | 2000-06-12 | 2003-12-15 | ミノルタ株式会社 | Imaging lens device |
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|---|---|---|---|---|
| CN102707416A (en) * | 2012-06-11 | 2012-10-03 | 浙江舜宇光学有限公司 | Micro camera lens |
| CN103558677A (en) * | 2013-11-11 | 2014-02-05 | 舜宇光学(中山)有限公司 | Athermal monitoring camera lens |
| CN104280860A (en) * | 2014-09-18 | 2015-01-14 | 利达光电股份有限公司 | High-resolution camera lens |
| CN104297906A (en) * | 2014-10-20 | 2015-01-21 | 宁波舜宇车载光学技术有限公司 | Optical lens |
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