CN207281374U - New fish eye lens - Google Patents
New fish eye lens Download PDFInfo
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- CN207281374U CN207281374U CN201721190875.8U CN201721190875U CN207281374U CN 207281374 U CN207281374 U CN 207281374U CN 201721190875 U CN201721190875 U CN 201721190875U CN 207281374 U CN207281374 U CN 207281374U
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- new fish
- fish eye
- eye
- positive light
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Abstract
The utility model discloses a kind of new fish eye lens, include the first lens group with positive light coke successively from thing side to imaging surface along optical axis, diaphragm, and the second lens group with positive light coke, wherein, first lens group includes the first lens of curved month type towards imaging surface with negative power and concave surface, the second lens with negative power, the 3rd lens of biconvex with positive light coke, and the 4th lens of curved month type with positive light coke and concave surface towards imaging surface, second lens group includes the 5th lens of biconvex with positive light coke and the 6th lens of curved month type with negative power and concave surface towards thing side, 5th lens and the 6th lens glue are combined into the lens element with positive light coke, each lens are glass spheric glass, and the optical centre of each lens is located along the same line.New fish eye lens in the utility model can in 40 DEG C~+85 DEG C temperature ranges blur-free imaging, can realize miniaturization and can realize that multiplying power corrects.
Description
Technical field
Camera technical field is the utility model is related to, more particularly to a kind of new fish eye lens.
Background technology
Fish eye lens is one kind more special in all optical lens classifications, fish eye lens be a kind of front lens diameter very
Wide-angle lens that is short and being in parabolical and protruded to camera lens front portion, its focal length is extremely short and field angle is very big.Due to super large
Field angle advantage, is generally used for the shooting and projection of 120 ° to 180 ° even more large visual field environments, image-forming principle for " it is non-it is similar into
Picture ", i.e., by introducing quantitative " distortion ", produce big instead more than increase camera lens visual field.Fish eye lens is now widely used in high definition
The field of photography such as moving camera, unmanned plane camera, overall view monitoring.
At present, with the development of optical lens technology, although fish-eye structure type is constantly improved,
Basic structure does not change, main to include preceding group lens and rear group lens.And since the distortion of fish-eye aberration is difficult to correct,
Cause such lens imaging quality not ideal enough；And the mirror that usually the higher camera lens of the better resolution ratio of image quality uses
Piece quantity is more, and more eyeglass is conducive to correct aberration raising resolution ratio, but the size of camera lens and cost also rise therewith.Example
Such as, in CN200810079749 patents, although fish-eye field angle up to 240 °, as a result of ten sheet glass
Spherical lens is composed so that and optics total length L=60.84mm of whole camera lens, is unfavorable for the miniaturization of whole camera lens, and
High expensive.
In addition, in order to obtain the imaging of high pixel, big wide-angle class fish eye lens has to carry out ratio chromatism, correction, but existing
Have in technology, many fish eye lens manufacturers use the aspherical eyeglass of many plastic cement, so to reduce cost in fish eye lens
And the species of plastic cement is seldom, correction multiplying power is relatively difficult to realize, and plastic cement is more sensitive to temperature, so that fish eye lens is difficult
With the occasion suitable for high temperature or low temperature.
Utility model content
Based on this, the purpose of this utility model is to provide a kind of Novel fish glasses for minimizing, being easily achieved multiplying power correction
Head.
The utility model provides a kind of new fish eye lens, and concrete technical scheme is as follows：
A kind of new fish eye lens, includes the first lens with positive light coke successively along optical axis from thing side to imaging surface
Group, diaphragm and the second lens group with positive light coke, wherein,
First lens group is included with negative power and concave surface towards the curved of imaging surface successively from thing side to imaging surface
The first lens of month type, the second lens with negative power, the 3rd lens of biconvex with positive light coke and with positive light focus
Degree and concave surface towards imaging surface the 4th lens of curved month type；
Second lens group include successively from thing side to imaging surface the 5th lens of biconvex with positive light coke and with
Towards the 6th lens of curved month type of thing side, the 5th lens and the 6th lens glue, which are combined into, to be had for negative power and concave surface
The lens element of positive light coke；
First lens, second lens, the 3rd lens, the 4th lens, the 5th lens and institute
It is all glass spheric glass, and the optical centre of each lens is located along the same line to state the 6th lens；
The new fish eye lens meets conditional：IH/ (f*tan θ) ＜ 0.2, wherein, IH represents the Novel fish glasses
Half image height of head, f represent the whole new fish-eye effective focal length, θ represent it is described it is new it is fish-eye maximum half
Field angle.
Compared with the prior art, new fish-eye structure composition can realize miniaturization described in the utility model, this
Outside, since each lens are all glass spheric glass, institute is so as to multiplying power easy to implement corrects.
In addition, according to new fish eye lens provided by the utility model, there can also be technical characteristic additional as follows：
Further, the new fish eye lens meets conditional：Wherein,Represent institute
The combination focal power of the second lens group is stated,Represent the whole new fish-eye focal power.
Further, the new fish eye lens meets conditional：Wherein,Represent the described 4th
Power of lens,Represent the 5th power of lens.
Further, the new fish eye lens meets conditional：Wherein,Represent
Second power of lens,Represent the 3rd power of lens.
Further, the new fish eye lens meets conditional：Vd1<41, Vd2＞ 40, Vd3＜ 45, Vd4＞ 50, Vd5>
50, Vd6<25, wherein, Vd1、Vd2、Vd3、Vd4、Vd5And Vd6First lens, second lens, described are represented respectively
Three lens, the 4th lens, the Abbe number of the 5th lens and the 6th lens.
Further, the new fish eye lens meets conditional：D5<D6<D4<D3<D2<D1, wherein, D1, D2, D3,
D4, D5 and D6 represent first lens, second lens, the 3rd lens, the 4th lens, the described 5th respectively
The optic diameter of lens and the 6th lens.
Further, convex radius of the 4th lens close to thing side is less than the concave curvature half close to imaging surface
Footpath, convex radius of the 5th lens close to thing side are more than the convex radius close to imaging surface.
Further, second lens are meniscus lens of the concave surface towards imaging surface.
Further, second lens for it is two-sided be all concave surface lens.
Compared with prior art, new fish eye lens provided by the utility model also has the following advantages that：
(1) the new fish eye lens uses six sheet glass spherical lenses, can be in -40 DEG C~+85 DEG C temperature ranges
Blur-free imaging, suitable for different temperature occasions, especially suitable for the harsher extreme sport of environment, unmanned plane, vehicle-mounted
Etc. field of photography；
(2) the 4th lens use meniscus lens of the concave surface towards imaging surface, can realize chief ray incidence angles
(CRA) bigger, so as to match the CMOS chip that CRA is 30 ° or so；
(3) the new fish eye lens is combined by the focal power between reasonable disposition eyeglass so that imaging clearly, can reach
More than 8000000 pixels；
(4) the new fish-eye field angle can effectively correct f- θ distortion up to 170 °, and control f- θ distortion is less than
3%, it disclosure satisfy that the high-resolution imaging needs of ultra-large vision field angle.
Brief description of the drawings
Fig. 1 is new fish-eye cross section structure schematic diagram in the utility model first embodiment；
Fig. 2 is new fish-eye curvature of field curve synoptic diagram in the utility model first embodiment, in figure：X-axis coordinate
Unit is millimeter, is curvature of field value, y-axis coordinate unit is angle, corresponding to the field angle of system；
Fig. 3 is to put spherical aberration curve synoptic diagram in the utility model first embodiment on new fish-eye axis, in figure：x
Axial coordinate unit is millimeter, is spherical aberration value, y-axis coordinate unit is angle, corresponding to the field angle of system；
Fig. 4 is new fish-eye lateral chromatic aberration curve synoptic diagram in the utility model first embodiment, in figure：X-axis
Coordinate unit is micron, is value of chromatism, y-axis coordinate unit is angle, corresponding to the field angle of system；
Fig. 5 is new fish-eye curvature of field curve synoptic diagram in the utility model second embodiment；
Fig. 6 is to put spherical aberration curve synoptic diagram in the utility model second embodiment on new fish-eye axis；
Fig. 7 is new fish-eye lateral chromatic aberration curve synoptic diagram in the utility model second embodiment；
Fig. 8 is new fish-eye cross section structure schematic diagram in the utility model 3rd embodiment；
Fig. 9 is new fish-eye curvature of field curve synoptic diagram in the utility model 3rd embodiment；
Figure 10 is to put spherical aberration curve synoptic diagram in the utility model 3rd embodiment on new fish-eye axis；
Figure 11 is new fish-eye lateral chromatic aberration curve synoptic diagram in the utility model 3rd embodiment；
Figure 12 is new fish-eye curvature of field curve synoptic diagram in the utility model fourth embodiment；
Figure 13 is to put spherical aberration curve synoptic diagram in the utility model fourth embodiment on new fish-eye axis；
Figure 14 is new fish-eye lateral chromatic aberration curve synoptic diagram in the utility model fourth embodiment；
Figure 15 is new fish-eye curvature of field curve synoptic diagram in the 5th embodiment of the utility model；
Figure 16 is to put spherical aberration curve synoptic diagram in the 5th embodiment of the utility model on new fish-eye axis；
Figure 17 is new fish-eye lateral chromatic aberration curve synoptic diagram in the 5th embodiment of the utility model.
Essential element symbol description
| First lens group | 10 | Second lens group | 20 |
| Diaphragm | 30 | Optical filter | 40 |
| Plate glass | 50 | Imaging surface | 60 |
| First lens | 11 | Second lens | 12 |
| 3rd lens | 13 | 4th lens | 14 |
| 5th lens | 21 | 6th lens | 22 |
Following embodiment will further illustrate the utility model with reference to above-mentioned attached drawing.
Embodiment
To enable the above-mentioned purpose of the utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings to this
The embodiment of utility model is described in detail.Elaborate many details in order to abundant in the following description
Understand the utility model.But the utility model can be much to implement different from other manner described here, this area
Technical staff can do similar improvement in the case of without prejudice to the utility model connotation, therefore the utility model is from following public affairs
The limitation for the specific implementation opened.
It should be noted that when element is referred to as " being fixedly arranged on " another element, it can be directly on another element
Or there may also be element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side ", " on ", " under " and similar statement is for illustrative purposes only, rather than instruction or the device or member that imply meaning
Part must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that limitation to the utility model.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the utility model.Term as used herein " and/or " include one or more relevant Listed Items
Arbitrary and all combination.
Referring to Fig. 1, the new fish eye lens provided in an embodiment of the utility model, along optical axis from thing side into
Image planes include the first lens group 10 with positive light coke, diaphragm 30 and the second lens group 20 with positive light coke successively,
Wherein,
First lens group 10 includes the bent moon with negative power and concave surface towards imaging surface successively from thing side to imaging surface
The first lens of type 11, the second lens 12 with negative power, the 3rd lens 13 of biconvex with positive light coke and with just
The 4th lens 14 of curved month type of focal power and concave surface towards imaging surface；
Second lens group 20 include successively from thing side to imaging surface the 5th lens 21 of biconvex with positive light coke and with
Towards the 6th lens 22 of curved month type of thing side, the 5th lens 21 and the glued composition of the 6th lens 22 have just for negative power and concave surface
The lens element of focal power；
First lens 11, the second lens 12, the 3rd lens 13, the 4th lens 14, the 5th lens 21 and the 6th lens 22 are all
Optical centre for glass spheric glass, and each lens is located along the same line.
Wherein, the optic diameter D1 of the first lens 11, the optic diameter D2 of the second lens 12, the eyeglass of the 3rd lens 13 are straight
Footpath D3, the optic diameter D4 of the 4th lens 14, the optic diameter D5 of the 5th lens 15 and the 6th lens 16 optic diameter D6 it
Between relation be：D5<D6<D4<D3<D2<D1.
Further, in all embodiments of the utility model, f represents new fish-eye focal length, and F# is represented
F-number, r represent the radius of curvature on optical surface vertex, d represent optical surface spacing (two adjacent optical surface vertex it
Between distance), ndRepresent the refractive index of each lens, Vd represents the material Abbe number of each lens, TLRepresent new fish eye lens
Optics overall length.
In following different embodiment, in new fish eye lens the relevant parameter of each eyeglass referring to each embodiment ginseng
Number table.
Embodiment 1
Referring to Fig. 1, the new fish eye lens provided for the utility model first embodiment, wherein, in the utility model
In embodiment, the second lens 12 are meniscus lens of the concave surface towards imaging surface.Fig. 2 to Fig. 4 is wherein referred to, which respectively show
New fish-eye optical indicatrix in the present embodiment, wherein, the relevant parameter of each eyeglass is such as in new fish eye lens
Shown in table 1.
Table 1
Embodiment 2
The new fish-eye cross section structure schematic diagram and first embodiment provided in the utility model second embodiment
More or less the same, it will not be described here, refers to Fig. 5 to Fig. 7, and which respectively show new fish-eye optics in the present embodiment
Characteristic curve, wherein, the relevant parameter of each eyeglass is as shown in table 2 in new fish eye lens.
Table 2
Embodiment 3
Referring to Fig. 8, the new fish eye lens provided for the utility model 3rd embodiment, wherein, in the utility model
In embodiment, the second lens 12 for it is two-sided be all concave surface lens.
Fig. 9 to Figure 11 is wherein referred to, which respectively show new fish-eye optical indicatrix in the present embodiment, its
In, the relevant parameter of each eyeglass is as shown in table 3 in new fish eye lens.
Table 3
Embodiment 4
The new fish-eye cross section structure schematic diagram and 3rd embodiment provided in the utility model fourth embodiment
More or less the same, it will not be described here, please refers to Fig.1 2 to Figure 14, and which respectively show new fish-eye light in the present embodiment
Characteristic curve is learned, wherein, the relevant parameter of each eyeglass is as shown in table 4 in new fish eye lens.
Table 4
Embodiment 5
The new fish-eye cross section structure schematic diagram and 3rd embodiment provided in the 5th embodiment of the utility model
More or less the same, it will not be described here, please refers to Fig.1 5 to Figure 17, and which respectively show new fish-eye light in the present embodiment
Characteristic curve is learned, wherein, the relevant parameter of each eyeglass is as shown in table 5 in new fish eye lens.
Table 5
Summary embodiment, the Abbe number Vd of the first lens 111<41, the Abbe number Vd of the second lens 122>40, the 3rd
The Abbe number Vd of lens 133<45, the Abbe number Vd of the 4th lens 144>50, the Abbe number Vd of the 5th lens 215>50, the 6th is saturating
The Abbe number Vd of mirror 226<25。
Convex radius of 4th lens 14 close to thing side is less than the concave curvature radius close to imaging surface, the 5th lens
21 convex radius close to thing side is more than the convex radius close to imaging surface.
Since the data area of penalty kick difference chromatic curve on curvature of field curve, axis is smaller, it is better to represent lens performance, from each
Attached drawing in embodiment can show that the scope of penalty kick dyeing difference is -0.04~+0.04 in the curvature of field, axis in each embodiment
Between, illustrate that the curvature of field in each embodiment and distortion can be corrected well.
Table 6 is above-mentioned 5 embodiments and its corresponding optical characteristics, including system focal length f, F-number F#, 2 θ of field angle
With optics overall length TL, and numerical value corresponding with above each conditional.
Table 6
It can be obtained by table 6, new fish-eye optics overall length is not more than 22.5mm, and 2 θ of field angle is 170 °.New flake
Half image height IH of camera lens, the relation between maximum angle of half field-of view θ and system effective focal length f are：IH/ (f*tan θ) ＜ 0.2.
Wherein, the combination focal power of the second lens group 20With new fish-eye focal powerRatio range be：This condition, which limits the second lens group 20, has positive light coke, is mainly used for that the first lens will be passed through
The convergence of rays of piece group 10 balances new fish-eye distortion aberration on imaging surface.
Wherein, the focal power of the 4th lens 14With the focal power of the 5th lens 15Ratio range be：4th lens 14 use meniscus lens of the concave surface towards imaging surface, can realize chief ray incidence angles
(CRA) bigger, so as to match the CMOS chip that CRA is 30 ° or so.Wherein, the focal power of the second lens 12With the 3rd
The focal power of lens 13The sum of ratio range be：
To sum up, new fish eye lens described in the utility model is designed using six sheet glass spheric glasses, its lens optical is total
Length is smaller, its structure composition can realize miniaturization, further, since each lens are all glass spheric glass, institute so as to
Multiplying power easy to implement correction and suitable for different humiture occasions, can in -40 DEG C~+85 DEG C temperature ranges clearly into
Picture, wherein the first lens group can provide larger field angle, the second lens group can effectively shorten lens combination total length, and provide
Good image quality, and produced suitable for batch machining, reduce cost.
Embodiment described above only expresses the several embodiments of the utility model, its description is more specific and detailed,
But it should not be interpreted as limiting the scope of the present invention.It should be pointed out that for the common of this area
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (9)
1. a kind of new fish eye lens, include successively from thing side to imaging surface along optical axis the first lens group with positive light coke,
Diaphragm and the second lens group with positive light coke, it is characterised in that：
First lens group includes the curved month type with negative power and concave surface towards imaging surface successively from thing side to imaging surface
First lens, the second lens with negative power, the 3rd lens of biconvex with positive light coke and with positive light coke and
Curved month type fourth lens of the concave surface towards imaging surface；
Second lens group is from thing side to imaging surface successively including the 5th lens of biconvex with positive light coke and with negative light
Focal power and concave surface is towards the 6th lens of curved month type of thing side, the 5th lens and the 6th lens glue are combined into positive light
The lens element of focal power；
First lens, second lens, the 3rd lens, the 4th lens, the 5th lens and described
Six lens are all glass spheric glass, and the optical centre of each lens is located along the same line；
The new fish eye lens meets conditional：IH/ (f*tan θ) ＜ 0.2, wherein, IH represents described new fish-eye
Half image height, f represent the whole new fish-eye effective focal length, and θ represents the new fish-eye maximum half field-of-view
Angle.
2. new fish eye lens according to claim 1, it is characterised in that：The new fish eye lens meets conditional：Wherein,Represent the combination focal power of second lens group,Represent the whole Novel fish
The focal power of glasses head.
3. new fish eye lens according to claim 1, it is characterised in that：The new fish eye lens meets conditional：Wherein,Represent the 4th power of lens,Represent the 5th power of lens.
4. new fish eye lens according to claim 1, it is characterised in that：The new fish eye lens meets conditional：Wherein,Represent second power of lens,Represent the light of the 3rd lens
Focal power.
5. new fish eye lens according to claim 1, it is characterised in that：The new fish eye lens meets conditional：
Vd1<41, Vd2＞ 40, Vd3＜ 45, Vd4＞ 50, Vd5>50, Vd6<25, wherein, Vd1、Vd2、Vd3、Vd4、Vd5And Vd6Table respectively
Show first lens, second lens, the 3rd lens, the 4th lens, the 5th lens and the described 6th
The Abbe number of lens.
6. new fish eye lens according to claim 1, it is characterised in that：The new fish eye lens meets conditional：
D5<D6<D4<D3<D2<D1, wherein, D1, D2, D3, D4, D5 and D6 represent first lens, second lens, institute respectively
State the optic diameter of the 3rd lens, the 4th lens, the 5th lens and the 6th lens.
7. new fish eye lens according to claim 1, it is characterised in that：4th lens are bent close to the convex surface of thing side
Rate radius is less than the concave curvature radius close to imaging surface, and convex radius of the 5th lens close to thing side is more than close
The convex radius of imaging surface.
8. the new fish eye lens according to claim 1 to 7 any one, it is characterised in that：Second lens are recessed
Facing to the meniscus lens of imaging surface.
9. the new fish eye lens according to claim 1 to 7 any one, it is characterised in that：Second lens are double
Face is all the lens of concave surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721190875.8U CN207281374U (en) | 2017-09-15 | 2017-09-15 | New fish eye lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721190875.8U CN207281374U (en) | 2017-09-15 | 2017-09-15 | New fish eye lens |
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| Publication Number | Publication Date |
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| CN207281374U true CN207281374U (en) | 2018-04-27 |
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ID=61981185
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| CN201721190875.8U Active CN207281374U (en) | 2017-09-15 | 2017-09-15 | New fish eye lens |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107450161A (en) * | 2017-09-15 | 2017-12-08 | 江西联创电子有限公司 | New fish eye lens |
| CN110441891A (en) * | 2019-08-02 | 2019-11-12 | 佛山科学技术学院 | A kind of compact ultra-wide angle FISH EYE LENS OPTICS system |
| WO2020107934A1 (en) * | 2018-11-27 | 2020-06-04 | 浙江舜宇光学有限公司 | Optical lens group |
-
2017
- 2017-09-15 CN CN201721190875.8U patent/CN207281374U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107450161A (en) * | 2017-09-15 | 2017-12-08 | 江西联创电子有限公司 | New fish eye lens |
| WO2020107934A1 (en) * | 2018-11-27 | 2020-06-04 | 浙江舜宇光学有限公司 | Optical lens group |
| CN110441891A (en) * | 2019-08-02 | 2019-11-12 | 佛山科学技术学院 | A kind of compact ultra-wide angle FISH EYE LENS OPTICS system |
| CN110441891B (en) * | 2019-08-02 | 2024-02-13 | 佛山科学技术学院 | Compact ultra-wide angle fisheye lens optical system |
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