CN108845403A - A kind of wide angle optical plastic cement system - Google Patents
A kind of wide angle optical plastic cement system Download PDFInfo
- Publication number
- CN108845403A CN108845403A CN201810734211.6A CN201810734211A CN108845403A CN 108845403 A CN108845403 A CN 108845403A CN 201810734211 A CN201810734211 A CN 201810734211A CN 108845403 A CN108845403 A CN 108845403A
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- China
- Prior art keywords
- lens
- convex surface
- focal length
- plastic cement
- wide angle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 52
- 239000004568 cement Substances 0.000 title claims abstract description 24
- 230000004313 glare Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000010959 steel Substances 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
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
-
- 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
- G02B13/004—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 four lenses
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention discloses a kind of wide angle optical plastic cement systems, are successively arranged from object side to image side：First lens, the first lens are plastic aspheric lenes, are on one side convex surface towards object side, are on one side concave surface towards image side；Diaphragm；Second lens are the plastic aspheric lenes of positive focal length；It is convex surface towards object side on one side, is on one side convex surface towards image side；The third lens are the plastic aspheric lenes of positive focal length；It is convex surface towards object side on one side, is on one side convex surface towards image side；4th lens, the 4th lens are the plastic aspheric lenes of negative focal length；It is concave surface towards object side on one side, is on one side convex surface towards image side；Optical filter；Sensitive film；F is the focal length of optical system, and IMH is the image height of optical system, and system meets following relationship：2.4<IMH/f<3.Present invention employs plastic cement non-spherical structure, therefore the image quality of optical system arrives large increase, and the product can be made to have preferable resolution ratio, transmitance, color reducibility to be significantly improved.
Description
【Technical field】
The present invention relates to technical field of optical, especially a kind of wide angle optical plastic cement system.
【Background technique】
Wide-angle optical lens compare more on the market at present, and the FOV of Vehicle-carrying type steel and flake class camera lens is enough, and camera lens overall length exists
10mm or more, or formed using glass modeling lens Hybrid assembling, not only volume is larger and at high cost for this camera lens, is not suitable for application
In the requirement of the installation monitoring camera lens of small instruments and tools.
Therefore, the present invention is based on above deficiency and generates.
【Summary of the invention】
The technical problem to be solved in the present invention is to provide a kind of wide angle optical plastic cement systems.
In order to solve the above technical problems, present invention employs following technical proposals：A kind of wide angle optical plastic cement system, it is special
Sign is, is successively arranged from object side to image side：
First lens, the first lens are plastic aspheric lenes, and the one side towards object side is convex surface, towards the one of image side
Face is concave surface；
Diaphragm；
Second lens, the second lens are the plastic aspheric lenes of positive focal length；Its one side towards object side is convex surface, direction
The one side of image side is convex surface；
The third lens, the third lens are the plastic aspheric lenes of positive focal length；Its one side towards object side is convex surface, direction
The one side of image side is convex surface；
4th lens, the 4th lens are the plastic aspheric lenes of negative focal length；Its one side towards object side is concave surface, direction
The one side of image side is convex surface；
Optical filter；
Sensitive film；
F is the focal length of optical system, and IMH is the image height of optical system, and system meets following relationship：
2.4<IMH/f<3。
A kind of wide angle optical plastic cement system as described above, which is characterized in that the focal length f of the first lens1It is negative, meets：
-3.0<f1<-1.8。
A kind of wide angle optical plastic cement system as described above, which is characterized in that the focal length f and total length of light path of optical system
TTL meets following relationship：
2.6<TTL/f<3.6。
A kind of wide angle optical plastic cement system as described above, which is characterized in that optical system meets following relationship：
vdlens1< 31, vdlens2> 50, vdlens3> 50, vdlens4< 31；
vdlens3-vdlens1<30；
Wherein, vdlens1For the abbe number of the first lens, vdlens2For the abbe number of the second lens, vdlens3For third
The abbe number of lens, vdlens4For the abbe number of the 4th lens.
A kind of wide angle optical plastic cement system as described above, which is characterized in that optical system meets following relationship：
sag1/IMH<0.36；
Wherein, sag1For the rise magnitude of the first lens, IMH is the image height of optical system.
A kind of wide angle optical plastic cement system as described above, which is characterized in that the refractive index of the non-spherical lens is greater than
Or it is equal to 1.5.
A kind of wide angle optical plastic cement system as described above, which is characterized in that first lens, the second lens, the
The aspherical surface shape of three lens meets following equation：
In formula, parameter c is curvature corresponding to radius, and y is that its unit of radial coordinate is identical with length of lens unit,
K is circular cone whose conic coefficient；When k-factor is less than -1, the face shape curve of lens is hyperbola, when k-factor is equal to -1, thoroughly
The face shape curve of mirror is parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, when k-factor is equal to 0
When, the face shape curve of lens is circle, and when k-factor is greater than 0, the face shape curve of lens is oblateness；a1To a8It respectively indicates each
Coefficient corresponding to radial coordinate.
Compared with prior art, a kind of wide angle optical plastic cement system of the invention, has reached following effect：
1, the angle of view of the invention can coverage can reach 160 °.
2, camera lens overall length of the invention is less than 4.3mm.
3, present invention employs plastic cement non-spherical structure, therefore the image quality of optical system arrives large increase, can be with
The product is set to have preferable resolution ratio, transmitance, color reducibility to be significantly improved.
【Detailed description of the invention】
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing, wherein：
Fig. 1 is schematic diagram of the present invention；
Fig. 2 is that MTF of the invention schemes；
【Specific embodiment】
It elaborates with reference to the accompanying drawing to embodiments of the present invention.
As depicted in figs. 1 and 2, a kind of wide angle optical plastic cement system, is successively arranged from object side to image side：
First lens 1, the first lens 1 are plastic aspheric lenes, and the one side towards object side is convex surface, towards image side
It is on one side concave surface；
Diaphragm 2；
Second lens 3, the second lens 3 are the plastic aspheric lenes of positive focal length；Its one side towards object side is convex surface, court
It is convex surface to the one side of image side；
The third lens 4, the third lens 4 are the plastic aspheric lenes of positive focal length；Its one side towards object side is convex surface, court
It is convex surface to the one side of image side；
4th lens 5, the 4th lens 5 are the plastic aspheric lenes of negative focal length；Its one side towards object side is concave surface, court
It is convex surface to the one side of image side；
Optical filter 6
Sensitive film 7；Light enters from optical filter 6, and optical filter 6 has certain protective effect, while also mistake to sensitive film 7
A part of light is filtered, veiling glare and hot spot etc. are reduced, while improving the beautiful degree of image color and sharpness, makes image color
With good color reducibility.
F is the focal length of optical system, and IMH is the image height of optical system, and system meets following relationship：
2.4<IMH/f<3。
As depicted in figs. 1 and 2, in the present embodiment, the focal length f of the first lens 11It is negative, meets：
-3.0<f1<-1.8；
Effectively the big incident ray of object space angle is converged.
As depicted in figs. 1 and 2, in the present embodiment, the focal length f and total length of light path TTL of optical system, meets following relationship
Formula：
2.6<TTL/f<3.6。
As depicted in figs. 1 and 2, in the present embodiment, optical system meets following relationship：
vdlens1< 31, vdlens2> 50, vdlens3> 50, vdlens4< 31；
vdlens3-vdlens1<30；
Wherein, vdlens1For the abbe number of the first lens 1, vdlens2For the abbe number of the second lens 3, vdlens3It is
The abbe number of three lens 4, vdlens4For the abbe number of the 4th lens 5；Balance light sets color difference, guarantees that camera lens real scene shooting will not go out
The phenomenon that existing monochromatic offset, avoid the appearance of coloured veiling glare.
As depicted in figs. 1 and 2, in the present embodiment, optical system meets following relationship：
sag1/IMH<0.36；
Wherein, sag1 is the rise magnitude of the first lens 1, and IMH is the image height of optical system；sag1<0.58mm guarantees saturating
Mirror is plastic, moreover it is possible to satisfaction group reload request.
As depicted in figs. 1 and 2, in the present embodiment, the refractive index of the non-spherical lens is all larger than or is equal to 1.5.It adopts
Optical extent of refraction can be increased with the non-spherical lens of high index, so that the length of whole system shortens
To 4.3mm or less.
As depicted in figs. 1 and 2, in the present embodiment, first lens 1, the second lens 3, the third lens 4 aspheric
The surface shape in face meets following equation：
In formula, parameter c is curvature corresponding to radius, and y is that its unit of radial coordinate is identical with length of lens unit,
K is circular cone whose conic coefficient；When k-factor is less than -1, the face shape curve of lens is hyperbola, when k-factor is equal to -1, thoroughly
The face shape curve of mirror is parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, when k-factor is equal to 0
When, the face shape curve of lens is circle, and when k-factor is greater than 0, the face shape curve of lens is oblateness；a1To a8It respectively indicates each
Coefficient corresponding to radial coordinate.
Present invention employs plastic cement non-spherical structures, greatly improve the image quality of camera lens, so that the camera lens has
Good resolution ratio, transmitance, imaged color reproducibility are significantly improved；As shown in Fig. 2, for system in the present embodiment
MTF (Modulation Transfer Function) curve graph.
The specific design parameter of camera lens is as shown in the table in one embodiment of the invention：
As shown in Fig. 2, for MTF (Modulation Transfer Function) curve graph of system in the present embodiment.
Claims (7)
1. a kind of wide angle optical plastic cement system, which is characterized in that be successively arranged from object side to image side：
First lens (1), the first lens (1) are plastic aspheric lenes, and the one side towards object side is convex surface, towards image side
It is on one side concave surface；
Diaphragm (2)；
Second lens (3), the second lens (3) are the plastic aspheric lenes of positive focal length；Its one side towards object side is convex surface, court
It is convex surface to the one side of image side；
The third lens (4), the third lens (4) are the plastic aspheric lenes of positive focal length；Its one side towards object side is convex surface, court
It is convex surface to the one side of image side；
4th lens (5), the 4th lens (5) are the plastic aspheric lenes of negative focal length；Its one side towards object side is concave surface, court
It is convex surface to the one side of image side；
Optical filter (6)；
Sensitive film (7)；
F is the focal length of optical system, and IMH is the image height of optical system, and system meets following relationship：
2.4<IMH/f<3。
2. a kind of wide angle optical plastic cement system according to claim 1, which is characterized in that the focal length f of the first lens (1)1For
It is negative, meet：
-3.0<f1<-1.8。
3. a kind of wide angle optical plastic cement system according to claim 1, which is characterized in that the focal length f and light of optical system
Lu overall length TTL, meets following relationship：
2.6<TTL/f<3.6。
4. a kind of wide angle optical plastic cement system according to claim 1, which is characterized in that optical system meets following relationship
Formula：
vdlens1< 31, vdlens2> 50, vdlens3> 50, vdlens4< 31；
vdlens3-vdlens1<30；
Wherein, vdlens1For the abbe number of the first lens (1), vdlens2For the abbe number of the second lens (3), vdlens3It is
The abbe number of three lens (4), vdlens4For the abbe number of the 4th lens (5).
5. a kind of wide angle optical plastic cement system according to claim 1, which is characterized in that optical system meets following relationship
Formula：
sag1/IMH<0.36；
Wherein, sag1For the rise magnitude of the first lens (1), IMH is the image height of optical system.
6. a kind of wide angle optical plastic cement system according to claim 1, which is characterized in that the refraction of the non-spherical lens
Rate is greater than or equal to 1.5.
7. a kind of wide angle optical plastic cement system according to claim 1, which is characterized in that first lens (1),
Two lens (3), the third lens (4) aspherical surface shape meet following equation：
In formula, parameter c is curvature corresponding to radius, and y is that its unit of radial coordinate is identical with length of lens unit, and k is
Circular cone whose conic coefficient；When k-factor is less than -1, the face shape curve of lens is hyperbola, when k-factor is equal to -1, lens
Face shape curve be parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, when k-factor is equal to 0
When, the face shape curve of lens is circle, and when k-factor is greater than 0, the face shape curve of lens is oblateness；a1To a8It respectively indicates each
Coefficient corresponding to radial coordinate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810734211.6A CN108845403A (en) | 2018-07-06 | 2018-07-06 | A kind of wide angle optical plastic cement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810734211.6A CN108845403A (en) | 2018-07-06 | 2018-07-06 | A kind of wide angle optical plastic cement system |
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| Publication Number | Publication Date |
|---|---|
| CN108845403A true CN108845403A (en) | 2018-11-20 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810734211.6A Pending CN108845403A (en) | 2018-07-06 | 2018-07-06 | A kind of wide angle optical plastic cement system |
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| CN (1) | CN108845403A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112799217A (en) * | 2021-02-05 | 2021-05-14 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
-
2018
- 2018-07-06 CN CN201810734211.6A patent/CN108845403A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112799217A (en) * | 2021-02-05 | 2021-05-14 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
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Application publication date: 20181120 |
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