CN204705759U - A kind of lens combination and camera lens - Google Patents
A kind of lens combination and camera lens Download PDFInfo
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- CN204705759U CN204705759U CN201520456636.7U CN201520456636U CN204705759U CN 204705759 U CN204705759 U CN 204705759U CN 201520456636 U CN201520456636 U CN 201520456636U CN 204705759 U CN204705759 U CN 204705759U
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Abstract
The utility model relates to optical instrument field, particularly a kind of lens combination and camera lens, cannot meet the problem of high definition picture display requirement in order to solve prior art.The utility model embodiment provides a kind of lens combination and camera lens, comprises successively from the object side to image side along optical axis: the first lens combination, the second lens combination, aperture diaphragm and the 3rd lens combination; First lens combination focal power is negative; Second lens combination focal power is just, comprising: focal power is the first positive subgroup and the first biconvex lens; 3rd lens combination focal power is just, comprises successively from the object side to image side along optical axis: the second biconvex lens, the first biconcave lens and focal power are the second positive subgroup; Second biconvex lens and the first biconcave lens glued together.This lens combination can the coma of balanced system and the curvature of field, can spherical aberration, the astigmatism of effective corrective system, reduces system chief ray emergence angle simultaneously, strengthens image illumination uniformity and color rendition degree.
Description
Technical field
The utility model relates to optical instrument field, particularly a kind of lens combination and camera lens.
Background technology
Along with high definition picture presents the development of technology, 1080P high definition picture cannot meet the demand of people, and 4K technology is arisen at the historic moment; With in recent years, the technological innovation of data transmission technology, data storage technology, image processing techniques and HDTV display technique and breakthrough, the ultra high-definition picture realizing 4K resolution is presented becomes possibility, and will become development trend from now on; This just requires that camera lens (lens combination) will have higher resolution, to meet the imaging requirements of 4K video camera.
Along with the improvement of lens processing technology and the raising of optical material performance, lens combination obtains tremendous development, but current existing lens combination and camera lens, under visible mode, level of resolution only can meet the video camera demand of below 5,000,000 pixels (great majority are all below 2,000,000 pixels); And under being switched to infrared mode night, confocal poor performance, actual imaging sharpness is poorer than visible ray effect.The main cause of this phenomenon is caused to be: existing lens combination adopts the planform of lens more single, difform lens can not well combine, the performance comparatively backwardness of optical glass material, parameters can not well be mated with image-forming condition, the spherical aberration of lens combination, coma, astigmatism, the curvature of field, ratio chromatism, chromatism of position are not well corrected, thus higher optical property cannot be realized.
In sum, there is larger aberration in existing lens combination and camera lens, imaging resolution is lower, cannot meet present high definition picture display requirement.
Utility model content
The utility model provides a kind of lens combination and camera lens, cannot meet the problem of high definition picture display requirement in order to solve prior art.
The utility model embodiment provides a kind of lens combination, comprises successively from the object side to image side along optical axis: have the first lens combination, the second lens combination, aperture diaphragm and the 3rd lens combination; Described first lens combination focal power is negative; Described second lens combination focal power is just, comprises successively from the object side to image side along optical axis: focal power is the first positive subgroup and focal power is the first positive biconvex lens; Described 3rd lens combination focal power is just, comprises successively from the object side to image side along optical axis: focal power is be the second positive subgroup for the second positive biconvex lens, focal power are the first negative biconcave lens and focal power; Described second biconvex lens and described first biconcave lens glued together.
The light of the first lens combination to the system of entering plays the effect of dispersing, and the light of Large visual angle can be made to enter system, simultaneously can the coma of balanced system and the curvature of field; In second lens combination, focal power is the first positive subgroup and focal power is the first positive biconvex lens, can spherical aberration, the astigmatism of effective corrective system, and Fast Convergent enters the light of system, make wider light beam can by optical system thereafter, the relative aperture of increase system, the second biconvex lens in 3rd lens combination and the first biconcave lens glued together, the chromatic aberration correction of system is played a crucial role; Focal power is the second positive subgroup, the spherical aberration of main corrective system, coma, astigmatism, reduces system chief ray emergence angle simultaneously, strengthens image illumination uniformity and color rendition degree.
Optionally, described first lens combination, comprises from the object side to image side successively along optical axis: focal power is the first negative meniscus lens and focal power is the second negative biconcave lens; Described first meniscus lens is convex surface facing thing side.
Focal power due to the first meniscus lens of the utility model embodiment is negative, the light of the system of entering is played to the effect of dispersing, thus makes the light of Large visual angle enter system.
Optionally, along optical axis, to comprise focal power from the object side to image side be successively the second negative meniscus lens and focal power to described first subgroup is the 3rd positive biconvex lens; Described second meniscus lens convex surface facing thing side; And described second meniscus lens and described 3rd biconvex lens glued together.
Because in the second lens combination of the utility model embodiment, the first subgroup comprises the second meniscus lens, because meniscus lens one side is convex surface, one side is the characteristic of concave surface, can reduce lens combination spherical aberration to greatest extent, thus improves image quality; 3rd biconvex lens can spherical aberration, the astigmatism of effective corrective system, and structure of the two gummed is conducive to minimizing system aberration, and shares focal power pressure, thus makes imaging system more stable.
Optionally, along optical axis, to be followed successively by focal power be from the object side to image side the first positive plano-convex lens and focal power to described second subgroup is the 4th positive biconvex lens; Described first plano-convex lens is plane towards the surface of thing side; Or described second subgroup along optical axis, to be followed successively by focal power be from the object side to image side the 5th positive biconvex lens and focal power is the 4th positive biconvex lens.
Due to the first plano-convex lens and the 4th biconvex lens of the second subgroup of the utility model embodiment, or the 5th biconvex lens and the 4th biconvex lens, the spherical aberration of main corrective system, coma, astigmatism, reduce system chief ray emergence angle simultaneously, strengthen image illumination uniformity and color rendition degree.
Optionally, described first biconvex lens is provided with vignetting stop towards the surface of image side.
Because the first biconvex lens of the utility model embodiment is provided with vignetting stop towards the surface of image side, improve the picture element level of Large visual angle, make its imaging beam selectively by system and the chief ray emergence angle CRA reducing system, prevent color offset.
Optionally, in described first meniscus lens, the optical glass material of lens meets following condition formulae relative to the refractive index of d light and Abbe number:
Nd≥1.58，Vd≥50 (1)。
Due to optical glass material Nd >=1.58 of the first meniscus lens of the utility model embodiment, Vd >=50, make the outside dimension of the first meniscus lens can not be excessive, material relative price is low, in addition compensating action is played to the coma of system, astigmatism, the curvature of field, can also effectively reduce system aberration.
Optionally, in described 4th biconvex lens, the optical glass material of lens meets following condition formulae relative to the refractive index of d light and Abbe number:
Nd≥1.8，Vd≤32 (2)。
Due to optical glass material Nd >=1.8 of the 4th biconvex lens 9 of the utility model embodiment, Vd≤32, can converge the light of being come by negative lens above efficiently, on the other hand in the corrective system curvature of field and adjustment System image planes chief ray incidence angles.
Optionally, the focal length of described first meniscus lens and the focal length of the second biconcave lens meet following condition formulae:
0.6≤f
11/f
12≤1 (3)。
Because the first meniscus lens of the utility model embodiment and the focal length of the second biconcave lens meet 0.6≤f
11/ f
12≤ 1, the focal power ratio of both reasonable distribution, can when ensureing that field angle is constant, the size of more effective control camera lens, simultaneously also can improving product stability; Such as, if f
11/ f
12<0.6, then the focal power born of the first meniscus lens is excessive, and radius-of-curvature is less, and difficulty of processing increases, and system high aberration increases; If f
11/ f
12>1, it is very little that the first meniscus lens bears pressure, and when light-inletting quantity is constant, the first meniscus lens volume increases, and is unfavorable for product miniaturization.And the utility model limits 0.6≤f
11/ f
12≤ 1, make the focal power ratio reasonable distribution of the first meniscus lens and the second biconcave lens, thus while improving product stability, make the miniaturized structure of lens combination and camera lens.
Optionally, the focal length of described second lens combination and the focal length of the 3rd lens combination meet following condition formulae:
0.55≤f
2/f
3≤0.8 (4)。
Due to the focal distance f of the second lens combination of the utility model embodiment
20.55≤f is met with the focal length of the 3rd lens combination
2/ f
3≤ 0.8, if f2/f3<0.55, then the second lens combination focal power is excessive, and system chief ray emergence angle increases, and affects relative exposure and color reducibility; If f2/f3>0.8, then the second lens combination focal power is less than normal, and the TTL optics overall length of system is difficult to do little; Meanwhile, the focal power that the 3rd lens combination is born is excessive, also can produce senior aberration.
Optionally, the described focal length of the second lens combination and the focal length of lens combination meet following condition formulae:
0.7≤f/f
2≤0.9 (5)。
Due to the focal distance f of the second lens combination of the utility model embodiment
20.7≤f/f is met with the focal distance f of lens combination
2≤ 0.9, major effect lens combination optics overall length, controls within 24.2mm by lens combination optics overall length, is also beneficial to the miniaturization of product simultaneously.
Optionally, in described lens combination, the overall length of optical system meets following condition formulae:
TTL≤24.2mm (6)。
Because the optical system overall length of the lens combination of the utility model embodiment is not more than 24.2mm, thus the miniaturization feature of outstanding lens construction, the structure of miniaturization make camera lens in use versatility and adaptability stronger.
Optionally, in described lens combination lens combination optics after overall length that is burnt and optical system meet following condition formulae:
0.25≤BFL/TTL≤0.35 (7)。
Because overall length that is burnt after the optics of the lens combination of the utility model embodiment and optical system meets this condition, thus make camera lens while ensureing shorter system overall length, also possess enough back work distances and more rational chief ray emergence angle.
The utility model embodiment provides a kind of camera lens, comprises above-mentioned lens combination.
Due to the camera lens of the utility model embodiment, adopt above-mentioned lens combination, aberration is corrected well, and imaging resolution is high, and image quality is excellent, and achieves the miniaturization of lens construction.
Accompanying drawing explanation
The structural representation (object space is in left-most position, and image space is in right-most position) that Fig. 1 (a) is the utility model embodiment lens combination;
Fig. 1 (b) is the structural representation one of the 3rd lens combination changeable type in the utility model embodiment lens combination;
Fig. 1 (c) is the structural representation two of the 3rd lens combination changeable type in the utility model embodiment lens combination;
Fig. 1 (d) is the structural representation three of the 3rd lens combination changeable type in the utility model embodiment lens combination;
Fig. 1 (e) is the structural representation four of the 3rd lens combination changeable type in the utility model embodiment lens combination;
Fig. 1 (f) is the structural representation of the second lens combination changeable type in the utility model embodiment lens combination;
Fig. 2 is the structural representation of the utility model embodiment camera lens;
Fig. 3 is optical transfer function (MTF) curve map of the utility model embodiment visible light part;
Fig. 4 is optical transfer function (MTF) curve map of the utility model embodiment infrared portions;
Fig. 5 is the curvature of field figure of the utility model embodiment visible light part;
Fig. 6 is the distortion figure of the utility model embodiment visible light part;
Fig. 7 is the axial aberration curve map of the utility model embodiment visible light part;
Fig. 8 is the chromatic longitudiinal aberration curve map of the utility model embodiment visible light part.
Embodiment
The utility model embodiment provides a kind of lens combination, comprises successively from the object side to image side along optical axis: the first lens combination, the second lens combination, aperture diaphragm and the 3rd lens combination; First lens combination focal power is negative; Second lens combination focal power is just, comprises successively from the object side to image side along optical axis: focal power is the first positive subgroup and focal power is the first positive biconvex lens; 3rd lens combination focal power is just, comprises successively from the object side to image side along optical axis: focal power is be the second positive subgroup for the second positive biconvex lens, focal power are the first negative biconcave lens and focal power; Second biconvex lens and described first biconcave lens glued together.
This lens combination, the first lens combination can make the light of Large visual angle enter system, simultaneously can the coma of balanced system and the curvature of field; First subgroup and the first biconvex lens in second lens combination, can spherical aberration, the astigmatism of effective corrective system, and Fast Convergent enters the light of system, makes wider light beam by optical system thereafter, can increase the relative aperture of system; The second biconvex lens in 3rd lens combination and the first biconcave lens glued together, the chromatic aberration correction of system is played a crucial role; Spherical aberration, coma, the astigmatism of the main corrective system of the second subgroup in the 3rd lens combination, reduce system chief ray emergence angle simultaneously, strengthen image illumination uniformity and color rendition degree.
A kind of lens combination that the utility model provides, can be applicable to safety defense monitoring system, TV, motion picture pickup, looks in the distance, the sciemtifec and technical sphere such as cinephotomicrography, and also can be applicable to cosmic space and explore, guided missile test, pursues and attacks the military fields such as observation rocket record; This lens combination can be widely used in imaging system with its high resolving power level and better infrared night vision effect.
Below in conjunction with Figure of description, the utility model embodiment is described in further detail.
As shown in Fig. 1 (a), it is the structural representation of a kind of lens combination that the utility model case study on implementation provides.This lens combination, comprises from the object side to image side successively along optical axis: the first lens combination G1, the second lens combination G2, aperture diaphragm 10 and the 3rd lens combination G3;
First lens combination G1 comprises the first meniscus lens 1 and the second biconcave lens 2;
Second lens combination G2 comprises the second meniscus lens 3, the 3rd biconvex lens 4 and the first biconvex lens 5, and the second meniscus lens 3 and the 3rd biconvex lens 4 glued together;
3rd lens combination G3 comprises the second biconvex lens 6, first biconcave lens 7, first plano-convex lens 8 and the 4th biconvex lens 9, and the second biconvex lens 6 and the first biconcave lens 7 glued together, wherein the first plano-convex lens 8 is plane towards the surface of thing side.
The first meniscus lens 1 in first lens combination G1 and the focal power of the second biconcave lens 2 are negative, the light of the system of entering is played to the effect of dispersing, the light of Large visual angle can be made to enter system, simultaneously can the coma of balanced system and the curvature of field; The 3rd biconvex lens 4 and the first biconvex lens 5 in second lens combination, can spherical aberration, the astigmatism of effective corrective system, and Fast Convergent enters the light of system, makes wider light beam by optical system thereafter, can increase the relative aperture of system; The second biconvex lens 6 in 3rd lens combination and the first biconcave lens 7 form cemented doublet, play a crucial role to the chromatic aberration correction of system; 3rd lens combination is near image side first plano-convex lens 8 and the 4th biconvex lens 9, and the spherical aberration of main corrective system, coma, astigmatism, reduce system chief ray emergence angle simultaneously, strengthen image illumination uniformity and color rendition degree.
As shown in Fig. 1 (b), in 3rd lens combination, the first plano-convex lens 8 can also be convex surface towards the surface of thing side, 3rd lens combination comprises from the object side to image side successively along optical axis: the second biconvex lens 6, first biconcave lens the 7, five biconvex lens 11 and the 4th biconvex lens 9.
As shown in Fig. 1 (c), the 3rd lens combination second subgroup can also only include the 6th biconvex lens 12 that has positive light coke.As shown in Fig. 1 (d), the 3rd lens combination second subgroup can also only include the second plano-convex lens 13 that has positive light coke.As shown in Fig. 1 (e), the 3rd lens combination second subgroup can also only include the 3rd meniscus lens 14 that has positive light coke.
In 3rd lens combination, the second subgroup adopts lens with positive light coke, while ensureing that the spherical aberration of system, coma, astigmatism are less, can also reduce optical system overall length, thus make lens system structure miniaturization more.
Optionally, the first lens combination G1, comprises from the object side to image side successively along optical axis: focal power is the first negative meniscus lens 1 and focal power is the second negative biconcave lens 2; First meniscus lens 1 is convex surface facing thing side.
In the utility model embodiment, the focal power of the first meniscus lens 1 is negative, the light of the system of entering is played to the effect of dispersing, and the light of Large visual angle can be made to enter system.
Optionally, along optical axis, to comprise focal power from the object side to image side be successively the second negative meniscus lens 3 and focal power to the first subgroup is the 3rd positive biconvex lens 4; Second meniscus lens 3 is convex surface facing thing side; And the second meniscus lens 3 and the 3rd biconvex lens 4 glued together.
In the utility model embodiment, the first subgroup comprises the second meniscus lens 3, and meniscus lens one side is convex surface, and one side is the characteristic of concave surface, can reduce lens combination spherical aberration to greatest extent, improves image quality; 3rd biconvex lens 4 can spherical aberration, the astigmatism of effective corrective system, and structure of the two gummed is conducive to minimizing system aberration, and shares focal power pressure, thus makes imaging system more stable.
It is positive lens that first subgroup can also only include a focal power, as shown in Fig. 1 (f), first subgroup can also only include the 7th biconvex lens 15, second meniscus lens 3 of gummed and the 3rd biconvex lens 4 are replaced with the 7th biconvex lens 15, the spherical aberration of effective corrective system, astigmatism can be ensured, and convergence enters the light of system, and reduce optical system overall length, thus be conducive to lens system structure miniaturization.
Optionally, along optical axis, to be followed successively by focal power be from the object side to image side the first positive plano-convex lens 8 and focal power to the second subgroup is the 4th positive biconvex lens 9; First plano-convex lens 8 is plane towards the surface of thing side; Or the second subgroup is followed successively by the 5th biconvex lens 11 and the 4th biconvex lens 9 from the object side to image side along optical axis.
In the utility model embodiment, first plano-convex lens 8 of the second subgroup and the 4th biconvex lens 9, or the 5th biconvex lens 11 and the 4th biconvex lens 9, the spherical aberration of main corrective system, coma, astigmatism, reduce system chief ray emergence angle simultaneously, strengthen image illumination uniformity and color rendition degree.
Optionally, the first biconvex lens 5 is provided with vignetting stop towards the surface of image side.
In the utility model embodiment, first biconvex lens 5 is provided with vignetting stop towards the surface of image side, in order to improve the picture element level of Large visual angle, making its imaging beam selectively by system and the chief ray emergence angle CRA reducing system, preventing color offset.
Optionally, the optical glass material of the first meniscus lens 1 meets following condition formulae relative to the refractive index Nd of d light and Abbe number Vd: Nd >=1.58, Vd >=50.
In the utility model embodiment, limit optical glass material Nd >=1.58 of the first meniscus lens 1, Vd >=50, the outside dimension that can limit the first meniscus lens 1 can not be excessive, material relative price is low, in addition compensating action is played to the coma of system, astigmatism, the curvature of field, also can effectively reduce system aberration.
Optionally, the optical glass material of the 4th biconvex lens 9 meets following condition formulae relative to the refractive index Nd of d light and Abbe number Vd: Nd >=1.8, Vd≤32.
In the utility model embodiment, optical glass material Nd >=1.8 of the 4th biconvex lens 9, Vd≤32, can converge the light of being come by negative lens above efficiently, on the other hand in the corrective system curvature of field and adjustment System image planes chief ray incidence angles.
Optionally, the focal distance f of the first meniscus lens 1
11with the focal distance f of the second biconcave lens 2
12meet following condition formulae: 0.6≤f
11/ f
12≤ 1.
In the utility model embodiment, the focal power ratio of both reasonable distribution, can when ensureing that field angle is constant, and the size of more effective control camera lens, simultaneously also can improving product stability.Such as, if f
11/ f
12<0.6, then the focal power born of the first meniscus lens 1 is excessive, and radius-of-curvature is less, and difficulty of processing increases, and system high aberration increases; If f
11/ f
12>1, it is very little that the first meniscus lens 1 bears pressure, and when light-inletting quantity is constant, the first meniscus lens 1 volume increases, and is unfavorable for product miniaturization.And the utility model limits 0.6≤f
11/ f
12≤ 1, make the focal power ratio reasonable distribution of the first meniscus lens 1 and the second biconcave lens 2, while improving product stability, make the miniaturized structure of lens combination and camera lens.
Optionally, the focal distance f of the second lens combination G2
2with the focal distance f of the 3rd lens combination G3
3meet following condition formulae: 0.55≤f
2/ f
3≤ 0.8.
In the utility model embodiment, limit the focal distance f of the second lens combination G2
20.55≤f is met with the focal length of the 3rd lens combination G3
2/ f
3≤ 0.8, if f2/f3<0.55, then the second lens combination G2 focal power is excessive, and system chief ray emergence angle increases, and affects relative exposure and color reducibility; If f2/f3>0.8, then the second lens combination G2 focal power is less than normal, and the TTL optics overall length of system is difficult to do little; Meanwhile, the focal power that the 3rd lens combination G3 bears is excessive, also can produce senior aberration.
Optionally, the focal distance f of the second lens combination G2
2following condition formulae is met: 0.7≤f/f with the focal distance f of lens combination
2≤ 0.9.
In the utility model embodiment, limit the focal distance f of the second lens combination G2
20.7≤f/f is met with the focal distance f of lens combination
2≤ 0.9, major effect lens combination optics overall length, controls within 24.2mm by lens combination optics overall length, is also beneficial to the miniaturization of product simultaneously.
Optionally, the optical system overall length of lens combination meets following condition formulae: TTL≤24.2mm.
In the utility model embodiment, the overall length limiting optical system is not more than 24.2mm, thus the miniaturization feature of outstanding lens construction, the structure of miniaturization makes camera lens convenient in use.
Optionally, after the optics of lens combination, overall length that is burnt and optical system meets following condition formulae: 0.25≤BFL/TTL≤0.35.
In the utility model embodiment, the restriction of the overall length of Jiao and optical system after the optics of duplet lens system, thus make camera lens while ensureing shorter system overall length, also possess enough back work distances and more rational chief ray emergence angle.
The utility model embodiment provides a kind of camera lens, comprises said lens system.
Due to the camera lens of the utility model embodiment, adopt above-mentioned lens combination, aberration is corrected well, and imaging resolution is high, and image quality is excellent, and achieves the miniaturization of lens construction.
In the utility model embodiment, each lens are towards the radius of curvature R on the surface of thing side
1with the radius of curvature R on the surface towards image side
2, optical glass material is relative to the refractive index N of d light
d, optical glass material is relative to the Abbe number V of d light
dand center thickness T
c, meet the condition listed by table 1 successively along light direction:
Table 1
In the utility model embodiment, nine lens that restriction adopts are towards the radius of curvature R of thing side surface
1with the radius of curvature R towards surface, image side
2, optical glass material is relative to the refractive index N of d light
d, optical glass material is relative to the Abbe number V of d light
dand center thickness T
c, make the planform of lens combination, the parameters such as Abbe number are mated with image-forming condition, and then the spherical aberration of lens combination, coma, astigmatism, the curvature of field, ratio chromatism, chromatism of position are well corrected, and reach higher resolution.
When meeting above condition, ensure that the aberration of whole lens combination is well corrected, properties meets request for utilization.
In specific implementation process, the radius of curvature R of each lens of described lens combination, center thickness T
c, refractive index N
d, and Abbe constant V
dmeet the condition listed by table 2:
Table 2
Below in conjunction with accompanying drawing and specific embodiment, the utility model is described.
In an embodiment, parameters meets table 2.
The camera lens that embodiment provides has following optical technology index:
Optics overall length TTL≤24.1mm;
The system focal distance f of camera lens is 4.5mm;
The system image planes of camera lens: 1/2.3 〞;
Aperture Range F is 2.0.
The structure of a kind of lens combination that the utility model embodiment provides can also comprise color filter GF and imaging surface IMA, comprise successively from the object side to image side along optical axis: the first lens combination G1, aperture diaphragm 10, second lens combination G2, 3rd lens combination G3, color filter GF and imaging surface IMA, as shown in Figure 2, the structural representation of this lens combination is only the structural representation of the utility model preferred embodiment, and for the lens combination of the second lens combination included as shown in Fig. 1 (f), and include as Fig. 1 (b), as Fig. 1 (c), as the lens combination of Fig. 1 (d) and the 3rd lens combination as shown in Fig. 1 (e), its structure also can also comprise color filter GF and imaging surface IMA.
Carry out detailed Optical system below by embodiment, introduce lens combination and camera lens that the present embodiment provides further.
Optical transfer function is used to more accurate, the directly perceived and common mode of the image quality of an evaluation optical system, its curve is higher, more level and smooth, show that the image quality of system is better, good correction has been carried out to various aberration (as: spherical aberration, coma, astigmatism, the curvature of field, axial chromatic aberration, chromatic longitudiinal aberration etc.).
As shown in Figure 3, Figure 4, wherein, Fig. 3 is optical transfer function (MTF) curve map of visible light part; Fig. 4 is optical transfer function (MTF) curve map of infrared portions.As can be known from Fig. 3, optical transfer function (MTF) curve map of this lens combination visible light part is comparatively level and smooth, concentrated, and full filed MTF mean value reaches more than 0.69, the lens combination that visible the present embodiment provides and camera lens, thus reach very high resolution, meet the imaging requirements of 1,200 ten thousand pixels and 4K video camera.As can be known from Fig. 4, this lens combination and camera lens infrared confocal in also there is good image quality, be much better than existing lens combination and camera lens on the market.
The curvature of field figure that lens combination visible light part is corresponding is made up of three curve T and three curve S; Wherein, article three, curve T represents the aberration of the meridional beam (Tangential Rays) that three kinds of wavelength (486nm, 587nm and 656nm) are corresponding respectively, article three, curve S represents the aberration of the sagittal beam (Sagittial Rays) that three kinds of wavelength (486nm, 587nm and 656nm) are corresponding respectively, meridianal curvature of field value and Sagittal field curvature value less, illustrate that image quality is better.As shown in Figure 5, meridianal curvature of field value controls within the scope of 0 ~ 0.04mm, and Sagittal field curvature value controls within 0 ~ 0.04mm scope.
The distortion figure that lens combination visible light part is corresponding, in figure, curve is more close to y-axis, and aberration rate is less.As shown in Figure 6, wherein aberration rate controls within-19.5% ~ 0 scope.
The axial chromatic aberration figure that lens combination visible light part is corresponding, in figure, curve changes near y-axis, the closer to y-axis, illustrates that lens combination image quality is better.As shown in Figure 7, its axial chromatic aberration controls between-0.02 ~+0.04mm.
The chromatic longitudiinal aberration figure that lens combination visible light part is corresponding, in figure, curve is more close to y-axis, illustrates that lens combination image quality is better.As shown in Figure 8, its chromatic longitudiinal aberration controls between-0.002 ~+0.002mm.
In sum, the utility model embodiment provides a kind of lens combination and camera lens, adopt the optical lens of nine ad hoc structure shapes, and be arranged in order to image side according to from thing side, and by the distribution of the focal power of each optical lens, adopt the optical glass material that adapts simultaneously, make the planform of lens combination, the parameters such as Abbe number are mated with image-forming condition, and then make the spherical aberration of lens combination, coma, astigmatism, the curvature of field, ratio chromatism, chromatism of position is well corrected, thus reach higher resolution (the highest support 1,200 ten thousand pixel camera machine) and better infrared confocal performance, and compact conformation, physical dimension is little, and all optical lenses all adopt spherical design, and cold machining process is functional, and production cost is low, can imaging device be widely applied to, realize the display of round-the-clock ultra high-definition picture.
Although described preferred embodiment of the present utility model, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the utility model scope.
Obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model is also intended to comprise these change and modification.
Claims (13)
1. a lens combination, is characterized in that, comprises successively from the object side to image side along optical axis: the first lens combination, the second lens combination, aperture diaphragm and the 3rd lens combination;
Described first lens combination focal power is negative;
Described second lens combination focal power is just, comprises successively from the object side to image side along optical axis: focal power is the first positive subgroup and focal power is the first positive biconvex lens;
Described 3rd lens combination focal power is just, comprises successively from the object side to image side along optical axis: focal power is be the second positive subgroup for the second positive biconvex lens, focal power are the first negative biconcave lens and focal power; Described second biconvex lens and described first biconcave lens glued together.
2. lens combination as claimed in claim 1, it is characterized in that, described first lens combination, comprises from the object side to image side successively along optical axis: focal power is the first negative meniscus lens and focal power is the second negative biconcave lens; Described first meniscus lens is convex surface facing thing side.
3. lens combination as claimed in claim 1, is characterized in that, along optical axis, to comprise focal power from the object side to image side be successively the second negative meniscus lens and focal power to described first subgroup is the 3rd positive biconvex lens; Described second meniscus lens convex surface facing thing side; And described second meniscus lens and described 3rd biconvex lens glued together.
4. lens combination as claimed in claim 1, it is characterized in that, along optical axis, to be followed successively by focal power be from the object side to image side the first positive plano-convex lens and focal power to described second subgroup is the 4th positive biconvex lens, and described first plano-convex lens is plane towards the surface of thing side; Or
Along optical axis, to be followed successively by focal power be from the object side to image side the 5th positive biconvex lens and focal power to described second subgroup is the 4th positive biconvex lens.
5. lens combination as claimed in claim 1, it is characterized in that, described first biconvex lens is provided with vignetting stop towards the surface of image side.
6. lens combination as claimed in claim 2, it is characterized in that, described first meniscus lens meets following condition formulae:
Nd≥1.58，Vd≥50
Wherein,
Nd is the refractive index of optical glass material relative to d light of lens;
Vd is the Abbe number of optical glass material relative to d light of lens.
7. lens combination as claimed in claim 4, it is characterized in that, described 4th biconvex lens meets following condition formulae:
Nd≥1.8，Vd≤32
Wherein,
Nd is the refractive index of optical glass material relative to d light of lens;
Vd is the Abbe number of optical glass material relative to d light of lens.
8. lens combination as claimed in claim 2, it is characterized in that, described first meniscus lens and the second biconcave lens meet following condition formulae:
0.6≤f
11/f
12≤1
Wherein,
F
11it is the focal length of the first meniscus lens;
F
12it is the focal length of the first biconcave lens.
9. lens combination as claimed in claim 1, it is characterized in that, described second lens combination and the 3rd lens combination meet following condition formulae:
0.55≤f
2/f
3≤0.8
Wherein,
F
2it is the focal length of the second lens combination;
F
3it is the focal length of the 3rd lens combination.
10. lens combination as claimed in claim 1, it is characterized in that, described second lens combination meets following condition formulae:
0.7≤f/f
2≤0.9
Wherein,
F
2it is the focal length of the second lens combination;
F is the focal length of lens combination.
11. lens combinations as claimed in claim 1, it is characterized in that, described lens combination meets following condition formulae:
TTL≤24.2mm
Wherein, TTL be the surface vertices of the first meniscus lens towards thing side to the distance of imaging surface, be the overall length of optical system.
12. lens combinations as claimed in claim 11, it is characterized in that, described lens combination meets following condition formulae:
0.25≤BFL/TTL≤0.35
Wherein,
BFL is the 4th biconvex lens towards the surface vertices of image side to the distance of imaging surface, burnt after being the optics of lens combination;
TTL be the surface vertices of the first meniscus lens towards thing side to the distance of imaging surface, be the optical system overall length of camera lens.
13. 1 kinds of camera lenses, is characterized in that, comprise the lens combination described in any one of claim 1 ~ 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520456636.7U CN204705759U (en) | 2015-06-26 | 2015-06-26 | A kind of lens combination and camera lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520456636.7U CN204705759U (en) | 2015-06-26 | 2015-06-26 | A kind of lens combination and camera lens |
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| CN204705759U true CN204705759U (en) | 2015-10-14 |
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| CN201520456636.7U Withdrawn - After Issue CN204705759U (en) | 2015-06-26 | 2015-06-26 | A kind of lens combination and camera lens |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324798A (en) * | 2015-06-26 | 2017-01-11 | 浙江大华技术股份有限公司 | Lens system and lens |
| CN108508571A (en) * | 2017-02-28 | 2018-09-07 | 宁波舜宇车载光学技术有限公司 | Imaging system lens group |
| CN113376821A (en) * | 2021-03-22 | 2021-09-10 | 季华实验室 | High-resolution microscopic imaging optical system |
| CN115047605A (en) * | 2022-07-05 | 2022-09-13 | 陈明君 | Imaging lens |
| CN117250742A (en) * | 2023-11-13 | 2023-12-19 | 荣耀终端有限公司 | Optical lens, camera module and terminal |
-
2015
- 2015-06-26 CN CN201520456636.7U patent/CN204705759U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324798A (en) * | 2015-06-26 | 2017-01-11 | 浙江大华技术股份有限公司 | Lens system and lens |
| CN106324798B (en) * | 2015-06-26 | 2019-05-21 | 浙江大华技术股份有限公司 | A kind of lens system and camera lens |
| CN108508571A (en) * | 2017-02-28 | 2018-09-07 | 宁波舜宇车载光学技术有限公司 | Imaging system lens group |
| CN113376821A (en) * | 2021-03-22 | 2021-09-10 | 季华实验室 | High-resolution microscopic imaging optical system |
| CN113376821B (en) * | 2021-03-22 | 2022-03-08 | 季华实验室 | High-resolution microscopic imaging optical system |
| CN115047605A (en) * | 2022-07-05 | 2022-09-13 | 陈明君 | Imaging lens |
| CN115047605B (en) * | 2022-07-05 | 2024-01-19 | 湖北准视光电科技有限公司 | Imaging lens |
| CN117250742A (en) * | 2023-11-13 | 2023-12-19 | 荣耀终端有限公司 | Optical lens, camera module and terminal |
| CN117250742B (en) * | 2023-11-13 | 2024-04-16 | 荣耀终端有限公司 | Optical lens, camera module and terminal |
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