CN105954859A - Wide-angle optical lens - Google Patents
Wide-angle optical lens Download PDFInfo
- Publication number
- CN105954859A CN105954859A CN201610568089.0A CN201610568089A CN105954859A CN 105954859 A CN105954859 A CN 105954859A CN 201610568089 A CN201610568089 A CN 201610568089A CN 105954859 A CN105954859 A CN 105954859A
- Authority
- CN
- China
- Prior art keywords
- lens
- wide
- angle optical
- focal length
- meet
- 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
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Classifications
-
- 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
- G02B13/001—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
- G02B13/0035—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 three lenses
-
- 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
Abstract
The invention discloses a wide-angle optical lens, which comprises a first lens, a second lens and a third lens from an object side to an image side. A diaphragm is arranged between the second lens and the third lens; the first lens is a negative focal power lens; the second lens and the third lens are positive focal power lenses; the second lens and the third lens are meniscus lenses, the convex surfaces of which face to the image side; and the first lens is a meniscus lens, the convex surface of which faces to the object side, or the first lens is a biconcave lens, or the first lens is a planoconcave lens, the concave surface of which faces to the image side. The focal power of the second lens and the focal power of the third lens meet the conditions in the specification simultaneously; offset can be controlled within +/-0.01 in a temperature range of -50 DEG C-90 DEG C, and focal power offset due to heat expansion and cold contraction of each part of the lens can be compensated well, so that the lens is allowed to realize clear imaging within a range of -50 DEG C-90 DEG C, and the viewing angle is wide; and the adopted lenses are few, and thus the size of the lens can be effectively reduced.
Description
Technical field
The present invention relates to a kind of image-forming block, particularly relate to the optical lens that a kind of angular field of view is wide.
Background technology
In recent years, along with the development of automobile mounted video, people are more and more convenient when reversing, but people more like
Joyous vehicle-mounted camera can have wider visual angle, and requires that photographic head volume is more and more less, thus the volume of camera lens is the most increasingly
Little, therefore it is required that lens construction is simpler, its internal eyeglass is unsuitable too much, simultaneously need to require that camera lens has preferably
The tolerance level of environmental change, the especially change to temperature, because photographic head self operationally needs heat release, and taking the photograph of having
As head is equipped with color-changing lamp, and color-changing lamp operationally needs to discharge substantial amounts of heat, causes the temperature of camera lens to raise rapidly, passes
The lens barrel of system can be affected along with its image quality of change of temperature.The most more about the patent documentation of wide-angle lens, mesh
The Chinese invention of front Application No. 201410558001.8 is applied for a patent " wide-angle lens " and is disclosed a kind of at-40 DEG C ~ 85 DEG C models
Enclosing the camera lens of interior imaging clearly, side-play amount is at ± 0.02mm, but the design of its lens barrel is complex, and eyeglass is more, virtually increases
The length of lens barrel, next too increases the cost of camera lens.
Summary of the invention
It is an object of the invention to provide a kind of simple in construction, and the quality of image is subject in the scope that temperature span is wider
Damage less.
A kind of wide-angle optical lens, including being arranged in sequence with the first lens, the second lens, the 3rd saturating from the object side to image side
Mirror, wherein, is provided with diaphragm between the second lens and the 3rd lens, described first lens are negative-power lenses, and described second
Lens and the 3rd lens are positive power lens, and described second lens and the 3rd lens are meniscus lens, its convex surface facing
Image side.
Described first lens are meniscus lens, and it is convex surface facing thing side, or described first lens are biconcave lens, or
Described first lens are platycelous lens, and its concave surface is towards image side.
Described first lens need to meet ND<1.6, VD>50；Described second lens need to meet ND<1.58, VD>00；3rd is saturating
Mirror meets ND<1.6, VD>50, and wherein, ND is refractive index, and VD is Abbe constant.
Described wide-angle lens meet 3 < TTL/EFL < 6.5, TTL be the first lens near thing side a little to imaging picture
Distance between face, EFL is the focal length of camera lens.
The focal length of described first lens is f1, and the focal length of the second lens is f2, and the focal length of the 3rd lens is f3, Jiao of lens
Following relation: f1 < f3 is met between away from, 1 < f2/f3 < 2.5.
Second, third lens described are non-spherical lens, and described aspheric surface formula is:
Wherein, k is quadratic surface coefficient, and c=1/r, r are minute surface center curvature radius, and r is the height at minute surface center, a2, a4, a6,
a8, a10, a12, a14, a16For asphericity coefficient.
Described first lens are glass lens, and second and third lens described are plastic lens.
Compared with prior art, the beneficial effects of the present invention is: the present invention is burnt by the light of the second lens and the 3rd lens
Degree meets above-mentioned condition simultaneously, and it can be that-50 DEG C ~ 90 DEG C interior side-play amounts control ± 0.01 in temperature range, it is possible to preferably
Compensate each parts of camera lens expand with heat and contract with cold produce after the side-play amount of focal power, make camera lens imaging in the range of-50 DEG C ~ 90 DEG C clear
Clear, and angular field of view is wide；Secondly the eyeglass that the present invention uses is few, and the volume of camera lens can effectively compress.
Accompanying drawing explanation
Fig. 1: lens construction sketch shown in the present invention.
In figure: 1 first lens, 2 second lens, 3 diaphragms, 4 the 3rd lens.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further elaborated.
Embodiment 1
A kind of wide-angle optical lens, including being arranged in sequence with the first lens, the second lens, the 3rd lens from the object side to image side, its
In, it is provided with diaphragm between the second lens and the 3rd lens, it is characterised in that described first lens are negative-power lenses, institute
Stating the second lens and the 3rd lens are positive power lens, described second lens and the 3rd lens are meniscus lens, and it is convex
Facing to image side, described first lens are meniscus lens, and it is convex surface facing thing side, or described first lens are that bi-concave is saturating
Mirror, or described first lens are platycelous lens, and its concave surface is towards image side.
Described first lens need to meet ND<1.6, VD>50；Described second lens need to meet ND<1.58, VD>00；3rd is saturating
Mirror meets ND<1.6, VD>50, and wherein, ND is refractive index, and VD is Abbe constant.
Described wide-angle lens meet 3 < TTL/EFL < 6.5, TTL be the first lens near thing side a little to imaging picture
Distance between face, EFL is the focal length of camera lens.
The focal length of described first lens is f1, and the focal length of the second lens is f2, and the focal length of the 3rd lens is f3, Jiao of lens
Following relation: f1 < f3 is met between away from, 1 < f2/f3 < 2.5.
Second, third lens described are non-spherical lens, and described aspheric surface formula is:
Wherein, k is quadratic surface coefficient, and c=1/r, r are minute surface center curvature radius, and r is the height at minute surface center, a2, a4, a6,
a8, a10, a12, a14, a16For asphericity coefficient.
Wherein, as long as each eyeglass meets above-mentioned requirements, then can obtain to become the most clearly in the range of-50 DEG C ~ 90 DEG C
Picture.
Described first lens are glass lens, and second and third lens described are plastic lens.
Embodiment 2
Present invention also offers and a kind of make the method for camera lens described in embodiment 1, comprise the steps: that (1) first lens are installed:
Being placed in lens cone frame by neat for lens barrel, lens cone frame is square 25 hole supports；First lens are placed on lens support plate
On, respectively two plate lens cone frame and a lens support plate are placed on upper lens device, with ear washing bulb by lens cone frame
Lens barrel blows, and removes the dust on surface, starts upper lens device, is placed in lens barrel by the first lens；(2) second is saturating
Mirror is installed: use same method to be placed on lens support plate by the second lens, by two lens cone frame and a lens support plate
Being placed on upper lens device, the dust in lens barrel is blown down by same employing ear washing bulb, starts upper lens device, by second
Lens are placed in lens barrel；(3) diaphragm is installed: continue to use ear washing bulb to blow down the dust on lens barrel, by artificial by light
Door screen is individually positioned in each lens barrel, notices that staff needs band fingerstall, is placed on eyeglass and leaves spot, (4) the 3rd lens
Install: be individually placed to automatically go up on lens device, again by the lens barrel after step (3) processes and lens barrel support plate and the 3rd lens board
Use ear washing bulb to be blown down by the dust on lens barrel, start upper lens device, the 3rd lens will be placed in lens barrel；(4) people
For placing waterproof grommet at the 3rd edge of lenses, the lens barrel after step (4) processes and lens barrel lid are used cover locking machine to enter by (5)
Row is tightened, and makes camera lens, and (6) the 3rd lens surface in direction, lens barrel image side smears one layer of filter coating, and (7) are checked, by camera lens
Test before putting imaging hole, see and look into its imaged viewing angle.
The detailed description of the invention of present invention described above, is not intended that limiting the scope of the invention, any basis
Various other done by the technology design of the present invention change or equivalencing accordingly, should be included in the claims in the present invention
Protection domain in.
Claims (6)
1. a wide-angle optical lens, including being arranged in sequence with the first lens, the second lens, the 3rd lens from the object side to image side,
Wherein, it is provided with diaphragm between the second lens and the 3rd lens, it is characterised in that described first lens are negative-power lenses,
Described second lens and the 3rd lens are positive power lens, and described second lens and the 3rd lens are meniscus lens, its
Convex surface facing image side, described first lens are meniscus lens, and it is convex surface facing thing side, or described first lens are that bi-concave is saturating
Mirror, or described first lens are platycelous lens, and its concave surface is towards image side.
Wide-angle optical lens the most according to claim 1, it is characterised in that described first lens need to meet ND<1.6, VD>
50；Described second lens need to meet ND<1.58, VD>00；3rd lens meet ND<1.6, VD>50, and wherein, ND is refractive index,
VD is Abbe constant.
Wide-angle optical lens the most according to claim 2, it is characterised in that described wide-angle lens meet 3 < TTL/EFL <
6.5, TTL be the first lens near thing side a little to the distance between imaging image planes, EFL is the focal length of camera lens.
Wide-angle optical lens the most according to claim 3, it is characterised in that the focal length of described first lens is f1, second
The focal length of lens is f2, and the focal length of the 3rd lens is f3, meets following relation: f1 < f3 between the focal length of lens, 1 < f2/f3 <
2.5。
Wide-angle optical lens the most according to claim 4, it is characterised in that second, third lens described are aspheric surface
Lens, described aspheric surface formula is:
Wherein, k is quadratic surface coefficient, and c=1/r, r are minute surface center curvature radius, and r is the height at minute surface center, a2, a4, a6,
a8, a10, a12, a14, a16For asphericity coefficient.
6. according to the wide-angle optical lens described in any one of claim 1 ~ 5, it is characterised in that described first lens are that glass is saturating
Mirror, second and third lens described are plastic lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610568089.0A CN105954859A (en) | 2016-07-19 | 2016-07-19 | Wide-angle optical lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610568089.0A CN105954859A (en) | 2016-07-19 | 2016-07-19 | Wide-angle optical lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105954859A true CN105954859A (en) | 2016-09-21 |
Family
ID=56900879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610568089.0A Pending CN105954859A (en) | 2016-07-19 | 2016-07-19 | Wide-angle optical lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105954859A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643585A (en) * | 2016-07-22 | 2018-01-30 | 日本电产三协株式会社 | Wide-angle lens |
| CN108303782A (en) * | 2018-02-11 | 2018-07-20 | 京东方科技集团股份有限公司 | Optical system and mobile terminal |
| CN109814240A (en) * | 2018-12-28 | 2019-05-28 | 玉晶光电股份有限公司 | Optical imaging lens |
| CN112859302A (en) * | 2021-02-05 | 2021-05-28 | 常州工学院 | Optical system of super-wide-angle door sight glass |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09159913A (en) * | 1995-12-06 | 1997-06-20 | Konica Corp | Albada type finder |
| JP2007041080A (en) * | 2005-07-29 | 2007-02-15 | Hoya Corp | Imaging lens and imaging apparatus |
| CN100389337C (en) * | 2005-01-31 | 2008-05-21 | 柯尼卡美能达精密光学株式会社 | Wide-angle lens system |
| CN100419491C (en) * | 2005-10-21 | 2008-09-17 | 富士能株式会社 | Wide-angle imaging lens system |
-
2016
- 2016-07-19 CN CN201610568089.0A patent/CN105954859A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09159913A (en) * | 1995-12-06 | 1997-06-20 | Konica Corp | Albada type finder |
| CN100389337C (en) * | 2005-01-31 | 2008-05-21 | 柯尼卡美能达精密光学株式会社 | Wide-angle lens system |
| JP2007041080A (en) * | 2005-07-29 | 2007-02-15 | Hoya Corp | Imaging lens and imaging apparatus |
| CN100419491C (en) * | 2005-10-21 | 2008-09-17 | 富士能株式会社 | Wide-angle imaging lens system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643585A (en) * | 2016-07-22 | 2018-01-30 | 日本电产三协株式会社 | Wide-angle lens |
| CN108303782A (en) * | 2018-02-11 | 2018-07-20 | 京东方科技集团股份有限公司 | Optical system and mobile terminal |
| CN109814240A (en) * | 2018-12-28 | 2019-05-28 | 玉晶光电股份有限公司 | Optical imaging lens |
| CN112859302A (en) * | 2021-02-05 | 2021-05-28 | 常州工学院 | Optical system of super-wide-angle door sight glass |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160921 |
|
| RJ01 | Rejection of invention patent application after publication |