CN202453576U - Wide-angle zoom lens - Google Patents
Wide-angle zoom lens Download PDFInfo
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- CN202453576U CN202453576U CN201220025865XU CN201220025865U CN202453576U CN 202453576 U CN202453576 U CN 202453576U CN 201220025865X U CN201220025865X U CN 201220025865XU CN 201220025865 U CN201220025865 U CN 201220025865U CN 202453576 U CN202453576 U CN 202453576U
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- zoom lens
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Abstract
The utility model discloses a wide-angle zoom lens which sequentially comprises a first fixed lens group, a second lens group, a third lens group and a fourth fixed lens group from the object side to the image side, wherein the first fixed lens has a negative refraction power; the second lens group can move along an optical axis and has a positive refraction power; the third lens group can move along the optical axis and has a negative refraction power; and the fourth fixed lens group has a positive refraction power. According to the wide-angle zoom lens disclosed by the utility model, a view field angle of over 80 degrees and the zoom ratio of over 6 times reach at the wide-angle end and the clear aperture of F2.8 is realized. In addition, various aberrations are better corrected and favorable production and assembly manufacturability is obtained. The wide-angle zoom lens is especially suitable for being applied to various digital cameras, digital videos and other video recording cameras.
Description
Technical field
The utility model relates to a kind of camera lens that is applied to various solid state image sensors, particularly is used for the wide-angle zoom lens of digital camera or DV.
Background technology
CCD and CMOS are widely used in image pick-up device, the developing the camera lens that requires to match rapidly and also will constantly reach higher performance of these electron devices.Requiring wide-angleization is a new problem that recently camera lens is proposed.But reach high-resolution again owing to will satisfy ultra wide-angle simultaneously, it is very difficult that high change multiple proportions becomes.
Similar therewith camera lens is described in patent US2009/0086332A1 to some extent: a field angle is greater than 76 °-86 ° wide-angle zoom lens, and the highest of its zoom ratio reaches 4 times.Another similar camera lens is described in patent US7199943B2 to some extent, and 3 times of a kind of zoom ratios are provided, the wide-angle zoom lens that short burnt field angle is 80 °, and its F/# is 3.6.To reach high zoom ratios simultaneously, big field angle, big clear aperture is very difficult.
The utility model content
The utility model is little for the field angle that solves the existence of video camera or camera lens, the change multiple proportions is little and unsharp problem that forms images provides a kind of wide-angle zoom lens that multiple proportions is big, imaging definition good, cost is low that becomes.
For reaching above performance, the utility model provides a kind of wide-angle zoom lens, comprises from the object side to image side:
First lens group has negative refraction power and stationkeeping;
Second lens group, having positive refracting power and position can move along optical axis;
The 3rd lens group, having negative refraction power and position can move along optical axis;
The 4th lens group has positive refracting power and stationkeeping;
First lens group from the thing side to comprising at least that as side 3 have the preceding eyeglass of negative power and the back eyeglass of a positive light coke.
Second lens group from the thing side to comprise a positive lens, a balsaming lens and a positive lens successively as side.
Said balsaming lens is made up of a positive lens and negative lens gummed.
The 3rd lens group comprises a negative lens.The compensation image planes is mobile in the zoom process, and the object of different object distances is focused, and guarantees favorable imaging quality.
The 4th lens group comprises a positive lens.
The refractive index of the back eyeglass of said first lens group is very big, and satisfies condition down:
Nd＞1.90
Nd is a refractive index.
At least one positive lens is an aspherical lens in said second lens group.
The Vd value of at least one eyeglass in said second lens group is greater than 80.
Said second lens group be suitable for along optical axis towards first lens group near or away from direction move.
During said zoom lens zoom, second lens group moves towards the approaching direction of first lens group along optical axis, and the distance that first lens group moves satisfies following relational expression:
0.35＞M1/0AL＜0.4
Wherein: M1 representes the distance that second lens group moves along optical axis from the wide-angle side to the telescope end, and OAL representes said zoom lens lens optical length overall.
Said second lens group along optical axis towards first lens group away from direction move, the focal length value of said zoom lens second lens group is f2, the focal length value of zoom lens wide-angle side is fw, and 1.9＜| f2/fw|＜2.5.
Said the 3rd lens group along optical axis towards first lens group away from direction move, the focal length value of said zoom lens the 3rd lens group is f3, the focal length value of zoom lens wide-angle side is fw, and 2＜| f3/fw|＜2.3.
The positive lens of said the 4th lens group is an aspherical lens.
Between said first lens group and second lens group diaphragm is set.
A kind of wide-angle zoom lens of the utility model reaches field angle more than 80 ° in wide-angle side, the zoom ratio more than 6 times, and the clear aperature of realization F2.8.And well correct various aberrations, production and assembly good manufacturability.Be fit to very much be used in various digital cameras, in DV or other videograph video cameras.
Description of drawings
Fig. 1 is the structural representation of the zoom lens of the utility model in wide-angle side.
Fig. 2 is the structural representation of the zoom lens of the utility model in intermediate ends.
Fig. 3 is the structural representation of the zoom lens of the utility model at telescope end.
Fig. 4 is the spherical aberration figure of the zoom lens of the utility model in wide-angle side.
Fig. 5 is the diagram of the zoom lens of the utility model in wide-angle side.
Fig. 6 is the distortion figure of the zoom lens of the utility model in wide-angle side.
Fig. 7 is the spherical aberration figure of the zoom lens of the utility model in intermediate ends.
Fig. 8 is the diagram of the zoom lens of the utility model in intermediate ends.
Fig. 9 is the distortion figure of the zoom lens of the utility model in intermediate ends.
Figure 10 is the spherical aberration figure of the zoom lens of the utility model at telescope end.
Figure 11 is the diagram of the zoom lens of the utility model at telescope end.
Figure 12 is the distortion figure of the zoom lens of the utility model at telescope end.
Figure 13 is the aberration diagram of the zoom lens of the utility model in wide-angle side.
Figure 14 is the aberration diagram of the zoom lens of the utility model in intermediate ends.
Figure 15 is the aberration diagram of the zoom lens of the utility model at telescope end.
Embodiment
Pass through embodiment below, and combine accompanying drawing that the ultra wide-angle zoom lens of two waveband of the utility model is further described.
Like Fig. 1, Fig. 2, shown in Figure 3, the utility model provides a kind of wide-angle zoom lens, comprises in order from the thing side:
Between first lens group 1 and second lens group 2 diaphragm 5. is set
The 3rd lens group 3, having negative refraction power and position can move along optical axis direction, is a negative lens.The compensation image planes is mobile in the zoom process, and the object of different object distances is focused, and guarantees favorable imaging quality.
The 4th lens group 4 has positive refracting power and stationkeeping; Be a positive lens, be aspherical lens.
Fig. 1 shown second lens group 2 and the 3rd lens group 3 with on optical axis with first lens group 1 away from state, this state is the situation that zoom lens is in wide-angle side.
Fig. 2 has shown that second lens group 2 and the 3rd lens group 3 are in the state in the middle of the optical axis, i.e. the zoom lens situation of end that mediates.
Fig. 3 has shown second lens group 2 and the 3rd lens group 3 and state approaching with first lens group 1 on optical axis, and promptly zoom lens is in the situation of telescope end.
During the zoom lens zoom, second lens group 2 moves towards first lens group, 1 approaching direction along optical axis, and the distance that first lens group 1 moves satisfies following relational expression:
0.35＞M1/0AL＜0.4
Wherein: M1 representes the distance that second lens group 2 moves along optical axis from the wide-angle side to the telescope end, and OAL representes this lens optical length overall.
The 3rd lens group 3 along optical axis towards first lens group 1 away from direction move, the focal length value of said zoom lens the 3rd lens group 3 is f3, the focal length value of zoom lens wide-angle side is fw, and 2＜| f3/fw|＜2.3.
The two waveband of the utility model ultra wide-angle zoom lens practical implementation data such as following table 1-2 and Fig. 4-15:
Table 1:
| Face | Curvature | Thickness | Glass |
| OBJ： | INFINITY | INFINITY | |
| 2： | 20.59263 | 0.800000 | 487489.70441 |
| 3： | 6.50000 | 2.535894 | |
| 4： | 35.05759 | 1.155182 | 804200.46502 |
| 5： | 10.52871 | 1.692359 | |
| 6： | -26.98716 | 0.700000 | 496997.81608 |
| 7： | 9.55270 | 2.391460 | 92286.208800 |
| 8： | 35.22757 | 21.278860 | |
| STO： | INFINITY | 1.600000 | |
| 10： | 5.96146 | 2.442219 | 496997.81608 |
| 11： | -41.74575 | 0.200000 | |
| 12： | 17.33828 | 3.162819 | 496997.81608 |
| 13： | -5.64829 | 0.659477 | 785897.43934 |
| 14： | 10.87821 | 0.200000 | |
| 15： | 6.37335 | 2.672762 | 517600.63500 |
| 16： | -11.75507 | 1.304579 | |
| 17： | -14.61169 | 0.800000 | 517600.63500 |
| 18： | 6.24560 | 2.063540 | |
| 19： | 70.29485 | 2.656834 | 591700.60700 |
| 20： | -8.24333 | 3.800000 |
| 21： | INFINITY | 1.000000 | 516798.64198 |
| IMG： | INFINITY | 0.000000 |
ASP:S15 (the 15th aspherical surface data)
A：-.148205E-02 B：-.305791E-04 C：-.674991E-05 D：0.195743E-06
ASP:S16 (the 16th aspherical surface data)
A：0.395044E-03 B：-.475786E-04 C：-.223816E-05 D：0.135915E-06
ASP:S19 (the 19th aspherical surface data)
A：-.122425E-03 B：0.599373E-05 C：-.783649E-06 D：-.272124E-07
ASP:S20 (the 20th aspherical surface data)
A：0.600969E-03 B：0.885444E-05 C：-.126082E-05 D：-.414241E-08
Table 2:
| Wide-angle side W | Intermediate ends M | Telescope end T | |
| The 8th interval (D8) | 21.27 | 8.06 | 1.1 |
| The 16th interval (D16) | 1.30 | 2.44 | 6.88 |
| The 18th interval (D18) | 2.06 | 14.13 | 16.66 |
| Focal length (f) | 4.0 | 12.2 | 26 |
| Aperture (FNO) | 2.8 | 5.5 | 7.4 |
| Field angle (FOV) | 79.4 | 26.8 | 13.2 |
The wide-angle zoom lens of the utility model is realized 80 ° of ultra wide-angles, the above zoom ratio of 6x, big clear aperature F2.8, imaging definition is good in whole zooming range.
Claims (10)
1. a wide-angle zoom lens is characterized in that, comprises successively from the object side to image side:
The first fixing lens group has negative refraction power;
Second lens group that can move along optical axis has positive refracting power;
The 3rd lens group that can move along optical axis has negative refraction power; With
The 4th fixing lens group has positive refracting power.
2. wide-angle zoom lens according to claim 1 is characterized in that, first lens group from the thing side to comprising at least that as side 3 have the preceding eyeglass of negative power and the back eyeglass of a positive light coke.
3. wide-angle zoom lens according to claim 2 is characterized in that the refractive index Nd of the back eyeglass of said first lens group is greater than 1.9.
4. wide-angle zoom lens according to claim 1 is characterized in that, second lens group from the thing side to comprise a positive lens, a balsaming lens and a positive lens successively as side.
5. wide-angle zoom lens according to claim 4 is characterized in that, said balsaming lens is made up of a positive lens and negative lens gummed.
6. wide-angle zoom lens according to claim 4 is characterized in that, at least one positive lens is an aspherical lens in said second lens group; The Vd value of at least one eyeglass in said second lens group is greater than 80.
7. wide-angle zoom lens according to claim 1 is characterized in that the 3rd lens group comprises a negative lens.
8. wide-angle zoom lens according to claim 1 is characterized in that the 4th lens group comprises a positive lens.
9. wide-angle zoom lens according to claim 1 is characterized in that, during said zoom lens zoom, second lens group moves towards the approaching direction of first lens group along optical axis, and the distance that first lens group moves satisfies following relational expression:
0.35＞M1/OAL＜0.4
Wherein: M1 representes the distance that second lens group moves along optical axis from the wide-angle side to the telescope end, and OAL representes said zoom lens optics length overall.
10. wide-angle zoom lens according to claim 1; It is characterized in that, said second lens group along optical axis towards first lens group away from direction move, the focal length value of said zoom lens second lens group is f2; The focal length value of zoom lens wide-angle side is fw, and 1.9＜| f2/fw|＜2.5; Said the 3rd lens group along optical axis towards first lens group away from direction move, the focal length value of said zoom lens the 3rd lens group is f3, and 2＜| f3/fw|＜2.3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220025865XU CN202453576U (en) | 2012-01-20 | 2012-01-20 | Wide-angle zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220025865XU CN202453576U (en) | 2012-01-20 | 2012-01-20 | Wide-angle zoom lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202453576U true CN202453576U (en) | 2012-09-26 |
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ID=46869431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220025865XU Expired - Fee Related CN202453576U (en) | 2012-01-20 | 2012-01-20 | Wide-angle zoom lens |
Country Status (1)
| Country | Link |
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| CN (1) | CN202453576U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018077267A (en) * | 2016-11-07 | 2018-05-17 | キヤノン株式会社 | Zoom lens and imaging apparatus having the same |
| JP2019120821A (en) * | 2018-01-09 | 2019-07-22 | キヤノン株式会社 | Zoom lens and imaging apparatus and imaging system having the same |
| JP2019139172A (en) * | 2018-02-15 | 2019-08-22 | キヤノン株式会社 | Zoom lens and image capturing device having the same |
| JP2019174711A (en) * | 2018-03-29 | 2019-10-10 | 富士フイルム株式会社 | Zoom lens and image capturing device |
| CN111562663A (en) * | 2020-06-02 | 2020-08-21 | 东莞市宇瞳光学科技股份有限公司 | Zoom lens |
| CN111880302A (en) * | 2020-06-28 | 2020-11-03 | 浙江大学 | Medical endoscopic optical zoom lens with high magnification and wide angle |
-
2012
- 2012-01-20 CN CN201220025865XU patent/CN202453576U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018077267A (en) * | 2016-11-07 | 2018-05-17 | キヤノン株式会社 | Zoom lens and imaging apparatus having the same |
| JP2019120821A (en) * | 2018-01-09 | 2019-07-22 | キヤノン株式会社 | Zoom lens and imaging apparatus and imaging system having the same |
| JP7020925B2 (en) | 2018-01-09 | 2022-02-16 | キヤノン株式会社 | Zoom lens and image pickup device with it, image pickup system |
| JP2019139172A (en) * | 2018-02-15 | 2019-08-22 | キヤノン株式会社 | Zoom lens and image capturing device having the same |
| JP7114267B2 (en) | 2018-02-15 | 2022-08-08 | キヤノン株式会社 | ZOOM LENS AND IMAGING DEVICE HAVING THE SAME |
| US10914929B2 (en) | 2018-03-29 | 2021-02-09 | Fujifilm Corporation | Zoom lens and imaging apparatus |
| US11327282B2 (en) | 2018-03-29 | 2022-05-10 | Fujifilm Corporation | Zoom lens and imaging apparatus |
| JP2019174711A (en) * | 2018-03-29 | 2019-10-10 | 富士フイルム株式会社 | Zoom lens and image capturing device |
| US11480775B2 (en) | 2018-03-29 | 2022-10-25 | Fujifilm Corporation | Zoom lens and imaging apparatus |
| US11640049B2 (en) | 2018-03-29 | 2023-05-02 | Fujifilm Corporation | Zoom lens and imaging apparatus |
| CN111562663B (en) * | 2020-06-02 | 2021-02-23 | 东莞市宇瞳光学科技股份有限公司 | Zoom lens |
| CN111562663A (en) * | 2020-06-02 | 2020-08-21 | 东莞市宇瞳光学科技股份有限公司 | Zoom lens |
| CN111880302A (en) * | 2020-06-28 | 2020-11-03 | 浙江大学 | Medical endoscopic optical zoom lens with high magnification and wide angle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20150120 |
|
| EXPY | Termination of patent right or utility model |