CN105467560A - Lens and imaging device - Google Patents
Lens and imaging device Download PDFInfo
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- CN105467560A CN105467560A CN201610038972.9A CN201610038972A CN105467560A CN 105467560 A CN105467560 A CN 105467560A CN 201610038972 A CN201610038972 A CN 201610038972A CN 105467560 A CN105467560 A CN 105467560A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention relates to a lens and an imaging device. The lens comprises a front lens group close to an object side, a rear lens group close to an image side, a reflection element and a diaphragm, wherein the front lens group comprises a first lens and a second lens; the rear lens group comprises a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens; the front lens group is a negative refractive index lens group, and the rear lens group is a positive refractive index lens group; the reflection element is arranged between the second lens and the third lens; the diaphragm is arranged between the third lens and the fourth lens. According to the invention, through the reflection element, the dimension of front and rear lens groups in a direction is reduced.
Description
Technical field
The present invention relates to optical lens technical field, particularly relate to a kind of camera lens and imaging device.
Background technology
Total space information to be obtained at present, can adopt two toward each other or be staggered place imaging optical system, each optical system comprises a wide-angle lens being greater than 180 degree of field angle and the imaging sensing device matched with wide-angle lens.Obtained the image information of all directions by these two imaging optical systems simultaneously, be spliced to form 4 π solid angle total space image informations by the expansion of overlapping region.
But the wide-angle lens using two to be greater than 180 degree of field angle inevitably there will be the problem that photocentre is separated, point defection of photocentre makes the image deterioration of image overlapping region.And distance is far away in the direction of the optical axis for two wide-angle lens, and the deterioration of lap image is more obvious.
In addition, the present inventor finds in the process implementing this invention: the existing wide-angle lens structure more than 180 degree of field angle often has vignetting at Large visual angle place, makes field rays can not be full of whole visual field.
Summary of the invention
The object of this invention is to provide a kind of camera lens and imaging device, the reflecting element comprised by this camera lens, reduce former and later two lens group size in one direction, make imaging effect better.
A kind of camera lens provided by the invention, comprising: front lens group, and described front lens group is near object space; Rear lens group, described rear lens group is near image space; Reflecting element; Diaphragm, wherein,
Described front lens group comprises: the first lens and the second lens; Described rear lens group comprises: the 4th lens, the 5th lens, the 6th lens, the 7th lens and the 8th lens; Described front lens group is negative refractive rate lens group, and described rear lens group is refractive positive lens group; Described reflecting element is arranged between described second lens and described 3rd lens; Described diaphragm is arranged between described 3rd lens and described four-barrel.
Alternatively, described first lens and described second lens are negative meniscus, described 3rd lens are double concave negative lens, described 4th lens are negative lens, described 5th lens and described 6th lens are lenticular positive lens, described 7th lens are double concave negative lens, and described 8th lens are positive lens.
Alternatively, described reflecting element is plane of reflection mirror or right-angle reflecting prism.
Alternatively, the surface of described first lens, described second lens, described 4th lens, described 5th lens, described 6th lens, described 7th lens and described 8th lens is sphere.
Alternatively, described camera lens meets the following conditions: 1.5≤| f12/f|≤3, and 3.5≤| f38/f|≤4.5, wherein, f is the focal length of described camera lens, and f12 is the focal length of described front lens group, and f38 is the focal length of described rear lens group.
Alternatively, glue together between described 4th lens and described 5th lens, glue together between described 6th lens and described 7th lens, and the Abbe number of described 5th lens and described 6th lens is greater than 50, the Abbe number of described 4th lens and described 7th lens is less than 40.
Alternatively, described camera lens meets the following conditions:
8≤| f1/f|≤10,3≤| f2/f|≤4,20≤| f45/f|≤30,8≤| f67/f|≤10 and 4≤| f8/f|≤5,
Wherein, f is the focal length of described camera lens, and f1 is the focal length of described first lens, f2 is the focal length of described second lens, f45 is the combined focal length of described 4th lens and described 5th lens, and f67 is the combined focal length of described 6th lens and described 7th lens, and f8 is the focal length of described 8th lens.
The present invention also provides a kind of imaging device, comprises the camera lens described in two above-mentioned any embodiment, and two described camera lenses are staggered relatively, and the optical axis of two described camera lenses is parallel to each other, the field angle of two described camera lenses is all greater than 180 degree.
Alternatively, first summit of the first lens of the front lens group that a described camera lens in two described camera lenses comprises is d1 to the distance on the second summit, first summit of the first lens of the front lens group that camera lens comprises described in another in two described camera lenses is d2 to the distance on the second summit, two described camera lenses meet the following conditions: d1=d2, and 8≤d1/f≤16
Wherein, described first summit is the intersection point of the object side surface of described optical axis and described first lens, and described second summit is the intersection point of the reflecting surface of described optical axis and described first lens, and f is the focal length of described camera lens.
A kind of camera lens provided based on technique scheme and imaging device, the reflecting element that can be comprised by this camera lens, is reduced former and later two lens group size in one direction, makes imaging effect better.
Accompanying drawing explanation
Accompanying drawing of the present invention is the technical scheme conveniently understanding the embodiment of the present invention further.
A kind of structural representation of camera lens of Fig. 1 for providing according to one embodiment of the invention;
A kind of optical property figure of camera lens of Fig. 2 for providing according to one embodiment of the invention;
A kind of structural representation of imaging device of Fig. 3 for providing according to one embodiment of the invention.
Description of reference numerals:
1 first lens
2 second lens
3 reflecting elements
4 the 3rd lens
5 diaphragms
6 the 4th lens
7 the 5th lens
8 the 6th lens
9 the 7th lens
10 the 8th lens
Embodiment
Clearer for what make the technical scheme of the embodiment of the present invention and advantage express, below by drawings and Examples, be described in further detail technical scheme of the present invention, following examples for illustration of the application, but are not used for limiting the scope of the application.
Fig. 1 is the structural representation of a kind of camera lens provided according to the embodiment of the present invention.This camera lens comprises: front lens group, rear lens group, reflecting element and diaphragm.As shown in Figure 1, this camera lens comprises from the object side to the image side successively: the first lens 1, second lens 2, reflecting element 3, the 3rd lens 4, diaphragm 5, the 4th lens 6, the 5th lens 7, the 6th lens 8, the 7th lens 9 and the 8th lens 10.
Wherein, front lens group comprises: the first lens 1 and the second lens 2, and rear lens group comprises: the 3rd lens 4, the 4th lens 6, the 5th lens 7, the 6th lens 8, the 7th lens 9 and the 8th lens 10.Further, front lens group is negative refractive rate lens group, and rear lens group is refractive positive lens group.
In this embodiment, because lens group before camera lens adopts negative refractive rate lens group, rear lens group adopts refractive positive lens group, so camera lens have employed the structure that positive and negative refraction rate lens group is separated on the whole, and like this can the aberration introduced due to large wide-angle of correction system to greatest extent.
A kind of camera lens that the present embodiment provides, the reflecting element that can be comprised by this camera lens, is reduced former and later two lens group size in one direction, makes imaging effect better.
In addition, a kind of camera lens visual field that the embodiment of the present invention provides can not produce vignetting, make the imaging illumination of visual field consistent, scene light intensity energy can be absorbed to greatest extent, so this camera lens can be widely used in large wide-angle scene and pan-shot, such as, shooting monitoring can be applied to, in the industries such as entertainment, educational training, display and demonstration.
Alternatively, in one embodiment, first lens 1 and the second lens 2 can be negative meniscus, 3rd lens 4 can be double concave negative lens, 4th lens 6 can be negative lens, 5th lens 7 and the 6th lens 8 can be lenticular positive lens, and the 7th lens 9 are double concave negative lens, and the 8th lens 10 are positive lens.
Alternatively, reflecting element 5 can be plane of reflection mirror, also can be right-angle reflecting prism.When reflecting element 5 is right-angle reflecting prism, be then be coated with reflectance coating at the hypotenuse surface of right-angle prism.
Alternatively, the surface of the first lens, the second lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens and the 8th lens can be sphere, also can be plane.Adopt the camera lens of lens arrangement in this, can significantly cut down finished cost.
Alternatively, a kind of camera lens provided by the invention meets the following conditions: 1.5≤| f12/f|≤3, and 3.5≤| f38/f|≤4.5, wherein, f is the focal length of described camera lens, and f12 is the focal length of described front lens group, and f38 is the focal length of described rear lens group.That is, f12 is the combined focal length of the first lens 1 of comprising of front lens group and the second lens 2, and f59 is the combined focal length of the 3rd lens 4, the 4th lens 6, the 5th lens 7, the 6th lens 8, the 7th lens 9 and the 8th lens 10 that rear lens group comprises.
Particularly, glue together between the 4th lens 6 and the 5th lens 7, that is, between the 4th lens 6 and the 5th lens 7, there is no clearance.Glue together between 6th lens 8 and the 7th lens 9, that is, between the 6th lens 8 and the 7th lens 9, there is no clearance.And the 5th the Abbe number of lens 7 and the 6th lens 8 be greater than 50, the Abbe number of the 4th lens 6 and the 7th lens 9 is less than 40.
Alternatively, a kind of camera lens provided by the invention also meets the following conditions: 8≤| f1/f|≤10,3≤| f2/f|≤4,20≤| f45/f|≤30,8≤| f67/f|≤10 and 4≤| f8/f|≤5, wherein, f is the focal length of camera lens, and f1 is the focal length of the first lens, f2 is the focal length of the second lens, f45 is the combined focal length of the 4th lens and the 5th lens, and f67 is the combined focal length of the 6th lens and the 7th lens, and f8 is the focal length of the 8th lens.
As one embodiment of the present of invention, the parameter of camera lens be as shown in Figure 1 normalized, the effective focal length that can obtain this camera lens is f=1mm, F number F#=2, and field angle is 2 ω=190 °.From the object side to the image side successively through the first lens, the second lens, reflecting element, the 3rd lens, diaphragm, the 4th lens, the 5th lens, the 6th lens, the 7th lens and the 8th lens.With the object side surface sequence number of the first lens for 1; the like; reflecting element object space transmission surface sequence number is 5; reflecting surface sequence number is 6; reflecting element image space transmission surface sequence number is 7; the cover glass object space image interface sequence number of display device is 19,20, and image planes sequence number is 21, and in this embodiment, the design data of each optical element is as shown in table 1.
Table 1
It should be noted that, the front surface of the second lens, the front and rear surfaces of the 3rd lens are non-spherical surface, aspheric shape uses height H and the asphericity coefficient of paraxial curvature C (inverse of the radius in table 1 shown in correspondence position), distance optical axis and limits as the equation of the aspheric surface amount on optical axis direction with X, and equation is as follows:
Wherein, K, A4, A6, A8, A10 are asphericity coefficient, and the aspherical surface data in above-described embodiment is as follows:
3rd surface: K=0; A4=0.0008912; A6=2.0828 × 10-5; A8=-3.9314 × 10-6; A10=1.3588 × 10-7.
8th surface: K=0; A4=-0.008369; A6=-0.001183; A8=0.0007880; A10=-0.0001567.
9th surface: K=0; A4=0.0007151; A6=-0.0005692; A8=0.0004861; A10=-0.0001043.
Should be understood that in this embodiment, carry out two lens glued together, phase cemented surface is a surface.
Optical property figure is as shown in Figure 2 the optical property figure according to the camera lens in above-described embodiment.As can be seen from Figure 2: the optical property MTF of this camera lens can reach more than 0.2 when 400 lines are right.
Composition graphs 1 and Fig. 2 describe a kind of camera lens that the embodiment of the present invention provides in detail above, describe below in conjunction with Fig. 3 a kind of imaging device that the embodiment of the present invention provides in detail.
Fig. 3 is the structural representation of a kind of imaging device provided according to the embodiment of the present invention.Imaging device as shown in Figure 3 comprises two as the camera lens in above-mentioned any embodiment.In two camera lenses, the structure lens construction all as shown in Figure 1 of each camera lens is identical, and two camera lenses are staggered relatively, and the optical axis of two camera lenses is parallel to each other, the field angle of two camera lenses is all greater than 180 degree.
Concrete, first summit of the first lens of the front lens group that a camera lens in two camera lenses comprises is d1 to the distance on the second summit, first summit of the first lens of the front lens group that another camera lens in two camera lenses comprises is d2 to the distance on the second summit, two camera lenses meet the following conditions: d1=d2, and 8≤d1/f≤16, wherein, first summit is the intersection point of the object side surface of optical axis and the first lens, second summit is the intersection point of the reflecting surface of optical axis and the first lens, and f is the focal length of camera lens.
A kind of imaging device that the present embodiment provides, is greater than two camera lenses of 180 degree by field angle staggered relatively, can obtain π radian solid angle total space visual field, space 4.Meanwhile, because each camera lens comprises reflecting element, former and later two lens group size in one direction that camera lens comprises can be reduced, significantly reduce the processing cost of wide-angle lens.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only the specific embodiment of the present invention; the protection domain be not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a camera lens, is characterized in that, comprising:
Front lens group, described front lens group is near object space;
Rear lens group, described rear lens group is near image space;
Reflecting element;
Diaphragm, wherein,
Described front lens group comprises: the first lens and the second lens;
Described rear lens group comprises: the 4th lens, the 5th lens, the 6th lens, the 7th lens and the 8th lens;
Described front lens group is negative refractive rate lens group, and described rear lens group is refractive positive lens group;
Described reflecting element is arranged between described second lens and described 3rd lens;
Described diaphragm is arranged between described 3rd lens and described four-barrel.
2. camera lens according to claim 1, it is characterized in that, described first lens and described second lens are negative meniscus, described 3rd lens are double concave negative lens, described 4th lens are negative lens, described 5th lens and described 6th lens are lenticular positive lens, and described 7th lens are double concave negative lens, and described 8th lens are positive lens.
3. camera lens according to claim 1, is characterized in that, described reflecting element is plane of reflection mirror or right-angle reflecting prism.
4. camera lens according to any one of claim 1 to 3, it is characterized in that, the surface of described first lens, described second lens, described 4th lens, described 5th lens, described 6th lens, described 7th lens and described 8th lens is sphere.
5. camera lens according to any one of claim 1 to 3, is characterized in that, described camera lens meets the following conditions:
1.5≤| f12/f|≤3, and 3.5≤| f38/f|≤4.5,
Wherein, f is the focal length of described camera lens, and f12 is the focal length of described front lens group, and f38 is the focal length of described rear lens group.
6. camera lens according to any one of claim 1 to 3, it is characterized in that, glue together between described 4th lens and described 5th lens, glue together between described 6th lens and described 7th lens, and the Abbe number of described 5th lens and described 6th lens is greater than 50, the Abbe number of described 4th lens and described 7th lens is less than 40.
7. camera lens according to any one of claim 1 to 3, is characterized in that, described camera lens meets the following conditions:
8≤| f1/f|≤10,3≤| f2/f|≤4,20≤| f45/f|≤30,8≤| f67/f|≤10 and 4≤| f8/f|≤5,
Wherein, f is the focal length of described camera lens, and f1 is the focal length of described first lens, f2 is the focal length of described second lens, f45 is the combined focal length of described 4th lens and described 5th lens, and f67 is the combined focal length of described 6th lens and described 7th lens, and f8 is the focal length of described 8th lens.
8. an imaging device, is characterized in that: comprise two camera lenses according to any one of claim 1-7, and two described camera lenses are staggered relatively, and the optical axis of two described camera lenses is parallel to each other, and the field angle of two described camera lenses is all greater than 180 degree.
9. imaging device according to claim 8, it is characterized in that: the first summit of the first lens of the front lens group that a described camera lens in two described camera lenses comprises is d1 to the distance on the second summit, first summit of the first lens of the front lens group that camera lens comprises described in another in two described camera lenses is d2 to the distance on the second summit, two d2, described camera lens meets the following conditions:
D1=d2, and 8≤d1/f≤16,
Wherein, described first summit is the intersection point of the object side surface of described optical axis and described first lens, and described second summit is the intersection point of the reflecting surface of described optical axis and described first lens, and f is the focal length of described camera lens.
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| CN201610038972.9A CN105467560B (en) | 2016-01-20 | 2016-01-20 | A kind of camera lens and imaging device |
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| CN201610038972.9A CN105467560B (en) | 2016-01-20 | 2016-01-20 | A kind of camera lens and imaging device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105759404A (en) * | 2016-05-04 | 2016-07-13 | 北京疯景科技有限公司 | Lens and imaging device |
| CN105892022A (en) * | 2016-06-24 | 2016-08-24 | 乐视控股（北京）有限公司 | Image acquisition device and panorama camera |
| CN106168707A (en) * | 2016-06-28 | 2016-11-30 | 嘉兴中润光学科技有限公司 | A kind of imaging device |
| CN107346058A (en) * | 2016-05-06 | 2017-11-14 | 信泰光学(深圳)有限公司 | Panorama camera lens |
| CN107918198A (en) * | 2016-10-10 | 2018-04-17 | 广州长步道光电科技有限公司 | A kind of super clear lens system of 360 ° of panoramas of twin-lens composition |
| WO2019024205A1 (en) * | 2017-07-31 | 2019-02-07 | 武汉赫天光电股份有限公司 | Panoramic optical system and electronic device |
| CN110161663A (en) * | 2019-04-22 | 2019-08-23 | 中国科学院西安光学精密机械研究所 | A kind of refrigeration mode is without the infrared fish eye optical systems of thermalization |
| CN110328445A (en) * | 2019-07-12 | 2019-10-15 | 卡门哈斯激光科技（苏州）有限公司 | A kind of near-infrared monochromatie objective |
| CN110488457A (en) * | 2019-07-17 | 2019-11-22 | 福州腾景光电科技有限公司 | A kind of periscope type lens |
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| CN109164557B (en) * | 2018-09-30 | 2020-01-21 | 江西联创电子有限公司 | Wide-angle lens and panoramic camera system |
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| US11137671B2 (en) * | 2016-05-04 | 2021-10-05 | Beijing Madv Technology Co., Ltd. | Camera lens and imaging device |
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| CN110161663B (en) * | 2019-04-22 | 2020-04-03 | 中国科学院西安光学精密机械研究所 | Refrigeration type athermal infrared fisheye optical system |
| CN110161663A (en) * | 2019-04-22 | 2019-08-23 | 中国科学院西安光学精密机械研究所 | A kind of refrigeration mode is without the infrared fish eye optical systems of thermalization |
| CN110328445B (en) * | 2019-07-12 | 2020-12-22 | 卡门哈斯激光科技（苏州）有限公司 | Near-infrared monochromatic objective lens |
| CN110328445A (en) * | 2019-07-12 | 2019-10-15 | 卡门哈斯激光科技（苏州）有限公司 | A kind of near-infrared monochromatie objective |
| CN110488457A (en) * | 2019-07-17 | 2019-11-22 | 福州腾景光电科技有限公司 | A kind of periscope type lens |
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