CN204143045U - Wide-angle lens - Google Patents
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- CN204143045U CN204143045U CN201420606974.XU CN201420606974U CN204143045U CN 204143045 U CN204143045 U CN 204143045U CN 201420606974 U CN201420606974 U CN 201420606974U CN 204143045 U CN204143045 U CN 204143045U
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Abstract
The utility model embodiment provides a kind of wide-angle lens, comprises front lens group, diaphragm and rear lens group successively from object space to image space, and front lens group comprises first lens and the second lens with negative power, and has the 3rd lens of positive light coke; Rear lens group comprises the 4th lens with negative power and the 5th lens with positive light coke, glues together between the 4th lens and the 5th lens; The material of the 3rd lens is glass; The second, the material of the 4th and the 5th lens is plastics; After the optics of wide-angle lens burnt with the side-play amount of temperature in-40 DEG C-85 DEG C in ± 0.02mm.The glass of this programme scioptics moulds combination, can reduce costs, by arranging each power of lens proportioning, can control burnt after the optics of wide-angle lens in ± 0.02mm with the side-play amount of temperature in-40 DEG C-85 DEG C, thus achieve imaging clearly in the wider temperature range of-40 DEG C-85 DEG C.
Description
Technical field
The utility model embodiment relates to optical technical field, particularly relates to a kind of wide-angle lens.
Background technology
Along with scientific-technical progress, digital camera or digital camera replace traditional mechanical camera gradually and become main flow in recent years.Except video camera and camera, the electronic installations such as some watch-dogs, drive recorder, mobile phone or game machine also can arrange in pairs or groups camera lens to provide camera function.
The volume of the electronic installations such as existing drive recorder, mobile phone or game machine is microminiaturized gradually, correspondingly, more and more higher to the requirement of the camera lens be loaded on these electronic installations, not only need the restriction meeting miniaturization and low cost, and need to keep good imaging definition in wider temperature range.
Existing wide-angle lens; generally comprise: front lens group, diaphragm and rear lens group; multi-disc plastic lens is adopted in front lens group and rear lens group; although can reduce costs; but burnt temperature variant side-play amount can exceed ± 0.05mm usually after the optics of wide-angle lens, what have even reaches ± 0.1mm, causes wide-angle lens image blur when temperature variation; more serious, also causing cannot imaging.
Therefore, how designing a kind of wide-angle lens that can provide low cost and keep good imaging definition in wider temperature range, is current industry problem demanding prompt solution.
Utility model content
The utility model embodiment provides a kind of wide-angle lens, with while reducing costs, in wider temperature range, keeps good imaging definition.
The utility model embodiment provides a kind of wide-angle lens, comprises successively along optical axis from object space to image space: front lens group, diaphragm and rear lens group;
Described front lens group comprises from object space successively to image space: first lens with negative power, second lens with negative power and have the 3rd lens of positive light coke;
Described rear lens group comprises from object space successively to image space: have the 4th lens of negative power and have the 5th lens of positive light coke, and described 4th lens and the 5th lens glue together and form the rear lens group with positive light coke;
The material of described 3rd lens is glass;
The material of described second lens, the 4th lens and the 5th lens is plastics;
After the optics of described wide-angle lens burnt with the side-play amount of temperature in-40 DEG C-85 DEG C in ± 0.02mm.
The wide-angle lens that the utility model embodiment provides, along optical axis from object space to the 3rd lens employing glass mirror of image space and the second lens, the 4th lens and the 5th lens employing glass lens, the glass of scioptics moulds combination, by the 4th lens and the 5th lens glue synthesis rear lens group, the cost of wide-angle lens can be reduced; And by rationally arranging each power of lens, can control in ± 0.02mm with the side-play amount of temperature in-40 DEG C-85 DEG C by burnt after the optics of wide-angle lens, thus side-play amount burnt after compensate for the caused machinery that expands with heat and contract with cold of physical construction in wide-angle lens, achieve imaging clearly in the wider temperature range of-40 DEG C-85 DEG C.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model, introduce doing one to the accompanying drawing used required in the utility model simply below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of a kind of wide-angle lens that Fig. 1 a provides for the utility model embodiment three;
The MTF of the wide-angle lens that Fig. 1 b provides for embodiment three separates image curve figure;
The astigmatism curve map of the wide-angle lens that Fig. 1 c provides for embodiment three;
The distortion curve figure of the wide-angle lens that Fig. 1 d provides for embodiment three;
The out of focus curve of the wide-angle lens that Fig. 1 e provides for embodiment three central vision 60lp/mm-40 DEG C time;
The out of focus curve of the wide-angle lens that Fig. 1 f provides for embodiment three central vision 60lp/mm 20 DEG C time;
The out of focus curve of the wide-angle lens that Fig. 1 g provides for embodiment three central vision 60lp/mm 85 DEG C time;
The structural representation of a kind of wide-angle lens that Fig. 2 a provides for the utility model embodiment four;
The MTF of the wide-angle lens that Fig. 2 b provides for embodiment four separates image curve figure;
The astigmatism curve map of the wide-angle lens that Fig. 2 c provides for embodiment four;
The distortion curve figure of the wide-angle lens that Fig. 2 d provides for embodiment four;
The out of focus curve of the wide-angle lens that Fig. 2 e provides for embodiment four central vision 60lp/mm-40 DEG C time;
The out of focus curve of the wide-angle lens that Fig. 2 f provides for embodiment four central vision 60lp/mm 20 DEG C time;
The out of focus curve of the wide-angle lens that Fig. 2 g provides for embodiment four central vision 60lp/mm 85 DEG C time.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the technical scheme in the utility model embodiment is described in further detail, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Be understandable that; specific embodiment described herein is only for explaining the utility model; but not to restriction of the present utility model; based on the embodiment in the utility model; those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.It also should be noted that, for convenience of description, illustrate only the part relevant to the utility model in accompanying drawing but not full content.
Embodiment one
The present embodiment provides a kind of wide-angle lens.Described wide-angle lens comprises to image space along optical axis successively from object space: the first lens, the second lens, the 3rd lens, diaphragm, the 4th lens and the 5th lens, described wide-angle lens can also comprise: color filter and imaging surface.
Wherein, the front lens group of described first lens, the second lens and the 3rd lens composition wide-angle lens, described 4th lens and the 5th lens are balsaming lens, and this balsaming lens is as the rear lens group of wide-angle lens.
Incident light by described front lens group, then enters described rear lens group through diaphragm, finally enters imaging surface.
Wherein, described first lens have negative power; Described second lens have negative power, and material is plastics; Described 3rd lens have positive light coke, and material is glass; Described 4th lens have negative power, and material is plastics; Described 5th lens have positive light coke, and material is plastics.
It should be noted that, described 3rd lens are focal powers unique in front lens group is positive lens, described 3rd power of lens varies with temperature the impact of the focal power of front lens group very large, therefore, described 3rd lens adopt glass mirror, because the refractive index of glass mirror is comparatively stable, thus the 3rd power of lens variation with temperature can be reduced, and then reduce the impact on the focal power of front lens group.
Wherein, described 4th lens and described 5th lens gummed and the described rear lens group that formed has positive light coke, after the optics of described wide-angle lens burnt with the side-play amount of temperature in-40 DEG C-85 DEG C in ± 0.02mm.
The technical scheme of the present embodiment, 3rd lens adopt glass mirror and the second lens, the 4th lens and the 5th lens to adopt glass lens, by the 4th lens and the 5th lens glue synthesis rear lens group, the glass of scioptics moulds combination, can reduce the cost of wide-angle lens; And by rationally arranging each power of lens, can control in ± 0.02mm with the side-play amount of temperature in-40 DEG C-85 DEG C by burnt after the optics of wide-angle lens, thus side-play amount burnt after compensate for the caused machinery that expands with heat and contract with cold of physical construction in wide-angle lens, achieve imaging clearly in the wider temperature range of-40 DEG C-85 DEG C.
It should be noted that, in the wide-angle lens of the present embodiment, described first lens are for exposing, such as described wide-angle lens is applied in vehicle-mounted side-looking or backsight camera lens, first lens expose in the environment usually, and therefore, the first lens preferably adopt glass mirror, thus effectively avoid wide-angle lens scraping in use, and resist rugged environment variable effect.
Embodiment two
The present embodiment provides a kind of wide-angle lens, and the present embodiment, on the basis of above-described embodiment, provides after the optics realizing wide-angle lens burnt with the preferred version of the side-play amount of temperature in-40 DEG C-85 DEG C in ± 0.02mm.
Particularly, the focal length F of the second lens
2with the combined focal length F of rear lens group
aftermeet 1.5>=| F
2/ F
after|>=0.9, with after the optics making wide-angle lens burnt with the side-play amount of temperature in-40 DEG C-85 DEG C in ± 0.02mm.
It should be noted that, because the first lens in wide-angle lens and the 3rd lens are glass lens, second lens, the 4th lens and the 5th lens are plastic lens, due to relative to glass lens, the refractive index of glass lens is comparatively stable, and therefore the focal power variation with temperature of wide-angle lens is mainly limited by the impact of described second lens, the 4th lens and the 5th lens.
The technical scheme of the present embodiment, 3rd lens adopt glass mirror and the second lens, the 4th lens and the 5th lens to adopt glass lens, by the 4th lens and the 5th lens glue synthesis rear lens group, the glass of scioptics moulds combination, can reduce the cost of wide-angle lens; By rationally arranging each power of lens, and the ratio of the focal length of conservative control second lens and the combined focal length of rear lens group, can control in ± 0.02mm with the side-play amount of temperature in-40 DEG C-85 DEG C by burnt after the optics of wide-angle lens, thus side-play amount burnt after compensate for the caused machinery that expands with heat and contract with cold of physical construction in wide-angle lens, achieve imaging clearly in the wider temperature range of-40 DEG C-85 DEG C.
Further preferably, the focal length F of the 4th lens
4, described 4th lens refractive index N
4with the rate of change dN of temperature t
4the focal length F of/dt, described 5th lens
5, and the refractive index N of described 5th lens
5with the rate of change dN of temperature t
5/ dt meets following formula:
-1.0≥(F
4/F
5)/((dN
4/dt)/(dN
5/dt))≥-1.2。
It should be noted that, if (F
4/ F
5)/((dN
4/ dt)/(dN
5/ dt)) >-1.0, namely there is the focal length F of the 4th lens of negative power
4change than the focal length F of the 5th lens with positive light coke
5change large, when the temperature increases, the combination positive focal length of rear lens group is caused to diminish, the change that can not compensate the combination negative focal length of front lens group is large, thus the focal power of wide-angle lens is changed toward negative power, after causing the optics of wide-angle lens, Jiao raises and the effect of " pyrocondensation " with temperature; Otherwise, when the temperature decreases, the effect of burnt rising with temperature after causing the optics of wide-angle lens and " cold rise ".
Similarly, if (F
4/ F
5)/((dN
4/ dt)/(dN
5/ dt)) <-1.2, namely there is the focal length F of the 4th lens of negative power
4change than the focal length F of the 5th lens with positive light coke
5change little, when the temperature is changed, the combination positive focal length variable quantity of rear lens group is large, substantially exceed the change of the combination negative focal length of front lens group, make the focal power of wide-angle lens excessive toward positive light coke change, burnt rising with temperature after the optics of also i.e. wide-angle lens and the effect of " expanding with heat and contract with cold " is too obvious.
This preferred embodiment, by the 4th lens and the 5th lens glue are synthesized rear lens group, and by rationally arranging each power of lens, and the ratio of the focal length of conservative control second lens and the combined focal length of rear lens group, and pass through the refractive index variation with temperature rate of reasonable distribution the 4th lens, and the 5th refractive index variation with temperature rate of lens, can control better in ± 0.02mm with the side-play amount of temperature in-40 DEG C-85 DEG C by burnt after the optics of wide-angle lens, thus side-play amount burnt after compensate for the caused machinery that expands with heat and contract with cold of physical construction in wide-angle lens, the imaging definition of further raising in the wider temperature range of-40 DEG C-85 DEG C.
Further, two minute surfaces that described first lens comprise along optical axis direction can be spherical mirror surface; Two minute surfaces that described second lens comprise along optical axis direction are all preferably aspherical mirror; Two minute surfaces that described 3rd lens comprise along optical axis direction can be spherical mirror surface; Two minute surfaces that described 4th lens comprise along optical axis direction are all preferably aspherical mirror; Two minute surfaces that described 5th lens comprise along optical axis direction are all preferably aspherical mirror.
By rationally arranging aspherical mirror in each lens, relative to spherical mirror surface, aspherical mirror can correct for optical aberrations better, therefore, it is possible to improve the imaging definition in the wider temperature range of-40 DEG C-85 DEG C further.
Further preferably, the d optical index Nd of the 3rd lens
3meet Nd
3>=1.7, d light Abbe constant Vd
3meet Vd
3≤ 30.
By adopting the 3rd lens of high index of refraction and high dispersion, can assemble fast, before the 3rd lens, all there is the first lens of negative power and the light of the second lens, and the value of chromatism of effective compensation wide-angle lens.
Further preferably, the d optical index Nd of the first lens
1meet Nd
1>=1.65, d light Abbe constant Vd
1meet Vd
1>=45.
By adopting the first lens of high index of refraction and low dispersion, effectively can import the light at Large visual angle angle, and reducing the bore of the first lens, with while the miniaturization of guarantee wide-angle lens, effectively improve the aberration of wide-angle lens.
Further preferably, the outermost point of described first lens object space side meets to the distance TTL of imaging surface and the focal length EFL of described wide-angle lens: 14 >=TTL/EFL >=6.5, effectively can control the distance of outermost point to imaging surface of the first lens object space side.
Further preferably, the outermost point of described 5th lens image side meets to the distance BFL of imaging surface and the focal length EFL of described wide-angle lens: BFL/EFL >=1.7, can reach the effect of long BFL, are conducive to the assembling of wide-angle lens.
Further preferably, the horizontal field of view angle HFOV of described wide-angle lens meets HFOV >=80 °.
Because the horizontal field of view angle of vehicle-mounted side-looking camera lens and backsight camera lens is usually between 80 ° to 160 °, be therefore more suitable for being applied in vehicle-mounted side-looking camera lens and backsight camera lens.
Further preferably, the f-number FNO of described wide-angle lens meets FNO≤2.2.
Usually, the logical light quantity of optical system and f-number inverse correlation, therefore, by reducing the f-number of wide-angle lens, be conducive to the logical light quantity improving wide-angle lens.
Embodiment three
Referring to Fig. 1 a, is the structural representation of a kind of wide-angle lens that the utility model embodiment three provides.The present embodiment, on the basis of above-described embodiment, provides the focal length F realizing the second lens
2with the combined focal length F of rear lens group
aftermeet 1.5>=| F
2/ F
after|>=0.9, and the focal length F realizing the 4th lens
4, described 4th lens refractive index N
4with the rate of change dN of temperature t
4the focal length F of/dt, described 5th lens
5, and the refractive index N of described 5th lens
5with the rate of change dN of temperature t
5/ dt meets-1.0>=(F
4/ F
5)/((dN
4/ dt)/(dN
5/ dt))>=preferred version of-1.2.
As shown in Figure 1a, described wide-angle lens comprises to image space along optical axis successively from object space: the first lens L1, the second lens L2, the 3rd lens L3, diaphragm L6, the 4th lens L4 and the 5th lens L5, and described wide-angle lens can also comprise: color filter L7 and imaging surface L8.
Wherein, described first lens L1, the second lens L2 and the 3rd lens L3 form the front lens group of wide-angle lens, and described 4th lens L4 and the 5th lens L5 is balsaming lens, and this balsaming lens is as the rear lens group of wide-angle lens.Incident light by described front lens group, then enters described rear lens group through diaphragm L6, finally enters imaging surface L8.
From object space, successively the face of each element is numbered, first lens L1 comprises minute surface S1 and minute surface S2, second lens L2 comprises minute surface S3 and minute surface S4,3rd lens L3 comprises minute surface S5 and minute surface S6, the diaphragm face of diaphragm L6 is S7,4th lens L4 comprises near the minute surface S8 of diaphragm L6 and the minute surface S9 away from diaphragm L6,5th lens L5 comprises minute surface S9 and minute surface S10, wherein, minute surface S9 is the composition surface that the 4th lens L4 and the 5th lens L5 glue together, and color filter L7 comprises minute surface S11 and minute surface S12.
In the present embodiment, the parameter of each element is as shown in the table respectively.
| Face sequence number | Radius-of-curvature r | Center thickness d | Refractive index Nd | Abbe constant Vd | Effective aperture D |
| 1 | 8.315 | 0.8 | 1.7292 | 54.68 | 7.14 |
| 2 | 2.505 | 0.9867 | 4.62 | ||
| *3 | 13.04 | 0.8 | 1.5346 | 56.07 | 4.56 |
| *4 | 2.0732 | 0.9041 | 3.61 | ||
| 5 | 5.1 | 1.63 | 1.8467 | 23.83 | 3.56 |
| 6 | -20.56 | 1 | 2.94 | ||
| 7 | Infinity | 0.11 | 1.68 | ||
| *8 | 3.9986 | 0.7 | 1.5855 | 29.93 | 1.94 |
| *9 | 0.9387 | 2.17 | 1.5346 | 56.07 | 2.57 |
| *10 | -2.124 | 0.2 | 3.06 | ||
| 11 | Infinity | 0.55 | 1.5168 | 64.17 | 3.28 |
| 12 | Infinity | 2.53968 | 3.38 | ||
| Imaging surface | Infinity | 4.18 |
Wherein, " * " represents aspheric surface.And the formula of aspherical mirror is:
In formula, Z is aspheric surface along optical axis direction when the position highly for h, apart from the distance rise on aspheric surface summit; C=1/r, r represent the radius-of-curvature of minute surface; K is circular cone coefficient conic; A, B, C, D and E are respectively high order aspheric surface coefficient, and the e in coefficient represents scientific notation, as e-05 represents 10-5.
Following table lists each aspheric coefficient k, A, B, C, D and E:
According to the parameter of each element in above-mentioned two tables, the parameter that can obtain described wide-angle lens is as shown in the table.
Wherein, TTL is the distance of outermost point to imaging surface L8 of the first lens L1 object space side; EFL is the focal length of wide-angle lens; DN
4/ dt is the refractive index N of the 4th lens L4
4with the rate of change of temperature t; DN
5/ dt is the refractive index N of the 5th lens L5
5with the rate of change of temperature t; F
4it is the focal length of the 4th lens L4; F
5it is the focal length of the 5th lens L5; BFL is the distance of outermost point to imaging surface L8 of the 5th lens L5 image side; F
2it is the focal length of the second lens L2; F
afterfor the combined focal length of rear lens group.
The f-number FNO of described wide-angle lens is 2.0, and horizontal field of view angle HFOV is 90 °.
According to above-mentioned concrete data, result as shown in the table can be calculated:
The wide-angle lens that the present embodiment provides is particularly useful for horizontal field of view angle at the vehicle-mounted side-looking camera lens of about 90 °.
The optical performance curve figure of wide-angle lens of Fig. 1 b-Fig. 1 g for providing corresponding to the present embodiment.
Wherein, Fig. 1 b is that MTF separates image curve figure, represents the comprehensive solution of a wide-angle lens as level.Fig. 1 c is astigmatism curve map, by F, d, C of commonly using (F=0.486um, d=0.588um, C=0.656um) three the wavelength of coloured light represent, unit is mm.Fig. 1 d is distortion curve figure, represents the distortion sizes values in different field angle situation, and unit is %.Fig. 1 e is the out of focus curve of central vision 60lp/mm-40 DEG C time.Fig. 1 f is the out of focus curve of central vision 60lp/mm 20 DEG C time.Fig. 1 g is the out of focus curve of central vision 60lp/mm 85 DEG C time.As seen from the figure, this wide-angle lens by various aberration correction to a good level, burntly after the optics of simultaneously described wide-angle lens to control in ± 0.02mm with the side-play amount of temperature in-40 DEG C-85 DEG C.
The wide-angle lens that the present embodiment provides, meets each parameter request in embodiment two, possesses corresponding beneficial effect.
Embodiment four
Referring to Fig. 2 a, is the structural representation of a kind of wide-angle lens that the utility model embodiment four provides.The present embodiment, on the basis of embodiment two, provides the focal length F realizing the second lens
2with the combined focal length F of rear lens group
aftermeet 1.5>=| F
2/ F
after|>=0.9, and the focal length F realizing the 4th lens
4, described 4th lens refractive index N
4with the rate of change dN of temperature t
4the focal length F of/dt, described 5th lens
5, and the refractive index N of described 5th lens
5with the rate of change dN of temperature t
5/ dt meets-1.0>=(F
4/ F
5)/((dN
4/ dt)/(dN
5/ dt))>=preferred version of-1.2.
In the present embodiment, the parameter of each element is as shown in the table respectively.
| Face sequence number | Radius-of-curvature r | Center thickness d | Refractive index Nd | Abbe constant Vd | Effective aperture D |
| 1 | 15.9407 | 0.8 | 1.6968 | 55.52 | 12.74 |
| 2 | 3.5631 | 2.7345 | 6.81 | ||
| *3 | -6.2548 | 0.8445 | 1.5119 | 56.29 | 6.82 |
| *4 | 2.4 | 1.4801 | 4.88 | ||
| 5 | 10 | 2.04 | 1.8467 | 23.79 | 4.84 |
| 6 | -10 | 1.7504 | 4.36 | ||
| 7 | Infinity | 0.3702 | 1.76 | ||
| *8 | 3.8611 | 0.8 | 1.5825 | 30.15 | 2.44 |
| *9 | 0.9524 | 2.2207 | 1.5346 | 56.07 | 3.06 |
| *10 | -2.2437 | 0.1 | 3.39 | ||
| 11 | Infinity | 0.55 | 1.5168 | 64.17 | 3.57 |
| 12 | Infinity | 2.6371 | 3.68 | ||
| Imaging surface | Infinity | 4.8 |
Wherein, " * " represents aspheric surface.And the formula of aspherical mirror is:
In formula, the physical significance of each symbol is identical with embodiment three, repeats no more herein.
Following table lists each aspheric coefficient k, A, B, C, D and E:
According to the parameter of each element in above-mentioned two tables, the parameter that can obtain described wide-angle lens is as shown in the table:
Wherein, in upper table, each pa-rameter symbols is identical with embodiment three, repeats no more herein.
The f-number FNO of described wide-angle lens is 2.0, and horizontal field of view angle HFOV is 150 °.
According to above-mentioned concrete data, result as shown in the table can be calculated:
The wide-angle lens that the present embodiment provides is particularly useful for horizontal field of view angle at the vehicle-mounted back vision camera lens of about 150 °.
The optical performance curve figure of wide-angle lens of Fig. 2 b-Fig. 2 g for providing corresponding to the present embodiment.
As seen from the figure, this wide-angle lens by various aberration correction to a good level, burntly after the optics of simultaneously described rear wide-angle lens to control in ± 0.02mm with the side-play amount of temperature in-40 DEG C-85 DEG C.
The wide-angle lens that the present embodiment provides, meets each parameter request in embodiment two, possesses corresponding beneficial effect.
Last it is noted that above each embodiment is only for illustration of the technical solution of the utility model, but not be limited; In embodiment preferred embodiment, be not limited, to those skilled in the art, the utility model can have various change and change.All do within spirit of the present utility model and principle any amendment, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a wide-angle lens, comprises to image space along optical axis successively from object space: front lens group, diaphragm and rear lens group, is characterized in that:
Described front lens group comprises from object space successively to image space: first lens with negative power, second lens with negative power and have the 3rd lens of positive light coke;
Described rear lens group comprises from object space successively to image space: have the 4th lens of negative power and have the 5th lens of positive light coke, and described 4th lens and the 5th lens glue together and form the rear lens group with positive light coke;
The material of described 3rd lens is glass;
The material of described second lens, the 4th lens and the 5th lens is plastics;
After the optics of described wide-angle lens burnt with the side-play amount of temperature in-40 DEG C-85 DEG C in ± 0.02mm.
2. wide-angle lens according to claim 1, is characterized in that, the focal length F of described second lens
2with the combined focal length F of described rear lens group
aftermeet 1.5>=| F
2/ F
after|>=0.9, with after the optics making described wide-angle lens burnt with the side-play amount of temperature in-40 DEG C-85 DEG C in ± 0.02mm.
3. wide-angle lens according to claim 2, is characterized in that, the focal length F of described 4th lens
4, described 4th lens refractive index N
4with the rate of change dN of temperature t
4the focal length F of/dt, described 5th lens
5, and the refractive index N of described 5th lens
5with the rate of change dN of temperature t
5/ dt meets following formula:
-1.0≥(F
4/F
5)/((dN
4/dt)/(dN
5/dt))≥-1.2。
4. according to the arbitrary described wide-angle lens of claim 1-3, it is characterized in that, two minute surfaces that described second lens comprise along optical axis direction are aspherical mirror, two minute surfaces that described 4th lens comprise along optical axis direction are aspherical mirror, and two minute surfaces that described 5th lens comprise along optical axis direction are aspherical mirror.
5. wide-angle lens according to claim 4, is characterized in that, the d optical index Nd of described 3rd lens
3meet Nd
3>=1.7, d light Abbe constant Vd
3meet Vd
3≤ 30.
6. wide-angle lens according to claim 4, is characterized in that, the d optical index Nd of described first lens
1meet Nd
1>=1.65, d light Abbe constant Vd
1meet Vd
1>=45.
7. wide-angle lens according to claim 4, is characterized in that, the outermost point of described first lens object space side meets to the distance TTL of imaging surface and the focal length EFL of described wide-angle lens: 14 >=TTL/EFL >=6.5.
8. wide-angle lens according to claim 4, is characterized in that, the outermost point of described 5th lens image side meets to the distance BFL of imaging surface and the focal length EFL of described wide-angle lens: BFL/EFL >=1.7.
9. wide-angle lens according to claim 4, is characterized in that, the horizontal field of view angle HFOV of described wide-angle lens meets HFOV >=80 °.
10. wide-angle lens according to claim 4, is characterized in that, the f-number FNO of described wide-angle lens meets FNO≤2.2.
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|---|---|---|---|
| CN201420606974.XU CN204143045U (en) | 2014-10-20 | 2014-10-20 | Wide-angle lens |
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|---|---|---|---|
| CN201420606974.XU CN204143045U (en) | 2014-10-20 | 2014-10-20 | Wide-angle lens |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360462A (en) * | 2014-10-20 | 2015-02-18 | 宁波舜宇车载光学技术有限公司 | Wide-angle lens |
| CN109597189A (en) * | 2017-09-30 | 2019-04-09 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN111323895A (en) * | 2018-12-14 | 2020-06-23 | 光芒光学股份有限公司 | Lens and manufacturing method thereof |
| CN114660762A (en) * | 2020-12-23 | 2022-06-24 | 宁波舜宇车载光学技术有限公司 | Optical lens and electronic device |
-
2014
- 2014-10-20 CN CN201420606974.XU patent/CN204143045U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360462A (en) * | 2014-10-20 | 2015-02-18 | 宁波舜宇车载光学技术有限公司 | Wide-angle lens |
| CN109597189A (en) * | 2017-09-30 | 2019-04-09 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN109597189B (en) * | 2017-09-30 | 2021-07-16 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN111323895A (en) * | 2018-12-14 | 2020-06-23 | 光芒光学股份有限公司 | Lens and manufacturing method thereof |
| CN114660762A (en) * | 2020-12-23 | 2022-06-24 | 宁波舜宇车载光学技术有限公司 | Optical lens and electronic device |
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