CN202615024U - Double-wave band ultra-wide-angle zoom lens - Google Patents
Double-wave band ultra-wide-angle zoom lens Download PDFInfo
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- CN202615024U CN202615024U CN 201220025861 CN201220025861U CN202615024U CN 202615024 U CN202615024 U CN 202615024U CN 201220025861 CN201220025861 CN 201220025861 CN 201220025861 U CN201220025861 U CN 201220025861U CN 202615024 U CN202615024 U CN 202615024U
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Abstract
The utility model discloses a double-wave band ultra-wide-angle zoom lens, comprising, orderly from an object side to an image side, a first lens group which can move along an optical axis, possesses a negative refraction power, and at least comprises a front lens set close to the object side and possessing a negative focal power and a back lens set close to the image side and possessing a positive focal power; and a second lens group which can move along the optical axis, possesses a positive refraction power, and comprises, orderly from the object side to the image side, a first positive lens, a balsaming lens, a second positive lens and a third positive lens. The double-wave band ultra-wide-angle zoom lens of the utility model reaches a more than 120-degree field angle and a more than three times zoom ratio at a wide-angle end, enables a F1.6 clear aperture to be realized and various aberrations to be corrected, and is very suitable for being used in various monitoring cameras, other video recording cameras or cameras.
Description
Technical field
The utility model relates to a kind of zoom lens, relates in particular to a kind of ultra wide-angle, dual-waveband imaging and the high miniature zoom lens of sharpness.
Background technology
Along with the development of the monitoring technique that improves constantly, the high definition camera lens is one of main direction of monitoring technique development.
In CCTV monitoring cameras such as (Closed Circuit Television), utilize visible light daytime, therefore utilize near infrared night, as the camera lens of the monitoring camera miniature zoom lens clearly that need from the visible light to the near infrared light, can both form images.
Similar therewith camera lens is described in patent CN101609206A to some extent, 2w=110 °-36 ° of its field angle of the confocal zoom lens of its two waveband; In open patent 2006-91643, also describe to some extent in addition, zoom ratio only reaches 2.5 times; Describe to some extent among the patent US20030179466A1: a field angle is greater than 100 ° wide-angle zoom lens, and the F number is greater than 2.0, and its zoom ratio only reaches 2 times.The field angle of above-mentioned zoom lens is big not enough, and it is less to become multiple proportions.
The utility model content
The utility model is little for the field angle that solves camera lens and exist, become the little and dual-waveband imaging of multiple proportions clearly problem a kind of ultra wide-angle is provided, become that multiple proportions is big, imaging definition good, the zoom lens of miniaturization.
For reaching above performance, the utility model provides a kind of two waveband ultra wide-angle zoom lens, comprises successively from the object side to image side:
First lens group, having negative refraction power (scattering) and position can move along optical axis;
Second lens group, having positive refracting power (optically focused) and position can move along optical axis;
First lens group comprise at least one near the preceding lens set with negative power and of thing side near back lens set with positive light coke as side; The second lens group thing side is to comprise first positive lens, balsaming lens, second positive lens and the 3rd positive lens successively as side.
The focal length value of said first lens group and second lens group satisfies following relational expression:
0.8＜|f1/f2|＜1.0
Wherein: f1 represents the first lens group focal length value, and f2 represents the second lens group focal length value.If do not satisfy the minimum value in the relational expression, the distance that can cause first lens group in the process of zoom, to move is long, and the length of camera lens is increased.If do not satisfy the maximal value in the relational expression, can cause the focal power of second lens group excessive, make aberration correction become difficult, and can't reach enough field angle.
The preceding lens set of said first lens group comprises two pieces of meniscus shaped lenses with negative refraction power successively from object space to picture side, one has the biconcave lens of negative refraction power.
The focal length value of lens set satisfies following relational expression before said:
0.5＜fl1/f1＜0.8
Wherein, fl representes the first lens group focal length value, the focal length value of lens set before fl1 representes in first lens group.The corresponding relation of the lens set and the first lens group focal power before this relational expression has been represented in first lens group.If do not satisfy the minimum value in the relational expression, the optical distortion meeting becomes very big and is difficult to correct.If do not satisfy the maximal value in the relational expression, the focal power of preceding lens set too a little less than, can cause before the lens set external diameter excessive, be unfavorable for the miniaturization of camera lens.
Said back lens set comprises 1 positive lens at least.
Second positive lens in said second lens group is a non-spherical lens.Can reach higher imaging requirements.
Said first lens group and second lens group be suitable for along optical axis towards each other near or each other away from direction move.
During said zoom lens zoom, first lens group and second lens group move along optical axis towards approaching direction each other, and the distance that first lens group moves satisfies following relational expression:
0.3＜|Ml/0AL?|＜0.5
The distance that on behalf of first lens group, Ml move along optical axis, OAL represents the zoom lens length overall.
Said first lens group and said second lens group along optical axis each other away from the time, the back focal length length value of said zoom lens is BFL, the focal length value of zoom lens wide-angle side is fw, and 1.8＜BFL/fw＜2.3.During promptly from telescope end to wide-angle side for each other away from.
Between first lens group of said zoom lens and second lens group diaphragm is set.
The aberration of said zoom lens reasonable correction visible light of ability and near infrared light, it is clear to guarantee that visible light can both form images near infrared light.
The ultra wide-angle zoom lens of the two waveband of the utility model reaches field angle more than 120 ° in wide-angle side, the zoom ratio more than 3 times, and the clear aperature of realization F1.6.Also rectifiable various aberrations, the production and assembly good manufacturability.Be fit to very much be used in various rig cameras, or in other videograph video cameras and in the camera.
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.
Figure 16 is the aberration diagram of the zoom lens of the utility model at the infrared wide-angle end.
Figure 17 is the aberration diagram of the zoom lens of the utility model in infrared intermediate ends.
Figure 18 is the aberration diagram of the zoom lens of the utility model at infrared 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 ultra wide-angle zoom lens, comprises in order from the thing side:
First lens group 1, having negative refraction power and position can move along optical axis direction;
First lens group comprises the preceding lens set 11 with negative power and has the back lens set 12 of positive light coke; Preceding lens set 11 comprises first meniscus shaped lens 111 and second meniscus shaped lens 112 with negative refraction power successively from object space to picture side, biconcave lens 113, the first meniscus shaped lenses 111 and second meniscus shaped lens, 112 faces with negative refraction power bend towards picture side.At least comprise a positive lens in the back lens set 12.
The second lens group thing side to comprise first positive lens 21 successively as side, by 1 positive lens and 1 balsaming lens 22, the second positive lenss 23 and the 3rd positive lens 24 that the negative lens gummed forms, and cover glass; Second positive lens 23 is non-spherical lenses.
The focal length value of first lens group 1 and second lens group 2 satisfies following relational expression:
0.8＜|f1/f2|＜1.0
0.5＜fl1/f1＜0.8
Wherein: fl represents first lens group, 1 focal length value, and f2 represents second lens group, 2 focal length values, the focal length value of lens set 11 before fl1 representes in first lens group 1.
First lens group 1 and second lens group 2 be suitable for along optical axis towards each other near or each other away from direction move.Fig. 1 shown first lens group 1 and second lens group 2 each other away from state, this state is the situation that zoom lens is in wide-angle side.
Fig. 2 has shown that first lens group 1 and second lens group 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 first lens group 1 and second lens group approaching state each other, and promptly zoom lens is in the situation of telescope end.
During the zoom lens zoom, first lens group 1 and second lens group 2 move towards mutual approaching direction along optical axis, and the distance that first lens group moves satisfies following relational expression:
0.3＜|Ml/0AL?|＜0.5
The distance that on behalf of first lens group, Ml move along optical axis, OAL represents the zoom lens length overall.
First lens group 1 is with said second lens group 2 during from telescope end to wide-angle side, promptly each other away from direction when moving, the back focal length length value of said zoom lens is BFL, the focal length value of zoom lens wide-angle side is fw, and 1.8＜BFL/fw＜2.3.
Between first lens group of said zoom lens and second lens group diaphragm is set.
In the zoom process, from the wide-angle side to the telescope end, the interval between first lens group 1 and second lens group 2 reduces gradually, and promptly first lens group 1 moves to picture side, and second lens group 2 moves to object space.
The two waveband of the utility model ultra wide-angle zoom lens practical implementation data such as following table 1-2 and Fig. 4-18:
Table 1:
| Face | Curvature | Thickness | Glass |
| 1 | 21.375 | 1.5 | 804200.465 |
| 2 | 8.221 | 2.67 | ? |
| 3 | 19.499 | 0.8 | 804200.465 |
| 4 | 9 | 2.95 | ? |
| 5 | -26.669 | 0.7 | 526192.7431 |
| 6 | 16.016 | 1.33 | ? |
| 7 | 16.236 | 3.06 | 742935.2648 |
| 8 | -3872.983 | 22.93 | ? |
| 9 | 6.942 | 2.77 | 496997.8161 |
| 10 | 189.641 | 0.33 | ? |
| 11 | 6.424 | 3.67 | 496997.8161 |
| 12 | -12.599 | 0.7 | 890957.3401 |
| 13 | 6.500 | 0.1 | ? |
| 14 | 5.621 | 1.50 | 589130.6118 |
| 15 | 9.153 | 0.77 | ? |
| 16 | 17.394 | 1.89 | 804200.465 |
| 17 | -44.745 | 1 | ? |
| 18 | |
2 | 516374.6412 |
| 19 | INFINITY | 3.28 | ? |
| IMG： | INFINITY | ? | ? |
[0067] The 14th aspherical surface data:
K ：-0.619303
A ：-.608698E-03B ：-.119083E-03C ：0.210400E-05D ：-.439597E-06S16
The 15th aspherical surface data:
K ：4.855155
A ：0.402489E-03B ：-.125470E-03C ：-.122631E-05D ：-.262202E-06
Table 2:
| ? | Wide-angle side | Intermediate ends | Telescope end |
| The 8th interval | 22.93 | 8.12 | 3.16 |
| The 17th interval | 1 | 4.23 | 7.35 |
| Focal length | 3.1 | 6 | 8.75 |
| Aperture | 1.6 | 2.1 | 2.9 |
| Field angle | 120 | 62 | 43 |
The utility model realize ultra wide-angle more than 120 °, 3x zoom ratio, greatly clear aperature F1.6, imaging definition is good in whole zooming range.
Claims (9)
1. the ultra wide-angle zoom lens of two waveband is characterized in that, comprises successively from the object side to image side:
First lens group that can move along optical axis has negative refraction power, comprise at least one near the preceding lens set with negative power and of thing side near back lens set with positive light coke as side; With
Second lens group that can move along optical axis has positive refracting power, and the second lens group thing side is to comprise first positive lens, balsaming lens, second positive lens and the 3rd positive lens successively as side.
2. the ultra wide-angle zoom lens of two waveband according to claim 1 is characterized in that, the focal length value of said first lens group and second lens group satisfies following relational expression:
0.8＜|f1/f2|＜1.0
Wherein: fl represents the first lens group focal length value, and f2 represents the second lens group focal length value.
3. the ultra wide-angle zoom lens of two waveband according to claim 1 is characterized in that, the focal length value of said preceding lens set satisfies following relational expression:
0.5＜fl1/f1＜0.8
Wherein, fl representes the first lens group focal length value, the focal length value of lens set before fl1 representes in first lens group.
4. according to the ultra wide-angle zoom lens of each described two waveband of claim 1-3; It is characterized in that; The preceding lens set of said first lens group comprises two pieces of meniscus shaped lenses with negative refraction power successively from object space to picture side, one has the biconcave lens of negative refraction power.
5. the ultra wide-angle zoom lens of two waveband according to claim 1 is characterized in that, said back lens set comprises 1 positive lens at least.
6. the ultra wide-angle zoom lens of two waveband according to claim 1 is characterized in that second positive lens in said second lens group is a non-spherical lens.
7. the ultra wide-angle zoom lens of two waveband according to claim 1 is characterized in that, first lens group and second lens group move towards mutual approaching direction along optical axis, and the distance that first lens group moves satisfies following relational expression:
0.3＜|Ml/OAL|＜0.5
The distance that on behalf of first lens group, Ml move along optical axis, OAL represents the zoom lens length overall.
8. the ultra wide-angle zoom lens of two waveband according to claim 1; It is characterized in that; Said first lens group and said second lens group along optical axis each other away from the time; The back focal length length value of said zoom lens is BFL, and the focal length value of zoom lens wide-angle side is fw, and 1.8＜BFL/fw＜2.3.
9. the ultra wide-angle zoom lens of two waveband according to claim 1 is characterized in that, between said first lens group and second lens group diaphragm is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220025861 CN202615024U (en) | 2012-01-20 | 2012-01-20 | Double-wave band ultra-wide-angle zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220025861 CN202615024U (en) | 2012-01-20 | 2012-01-20 | Double-wave band ultra-wide-angle zoom lens |
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| Publication Number | Publication Date |
|---|---|
| CN202615024U true CN202615024U (en) | 2012-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220025861 Expired - Fee Related CN202615024U (en) | 2012-01-20 | 2012-01-20 | Double-wave band ultra-wide-angle zoom lens |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103813139A (en) * | 2013-12-31 | 2014-05-21 | 南宁市公安局 | Vehicle-mounted monitoring device |
| CN105607234A (en) * | 2016-01-07 | 2016-05-25 | 东莞市宇瞳光学科技股份有限公司 | Super-high-definition fish-eye camera lens |
| CN114690388A (en) * | 2022-06-01 | 2022-07-01 | 江西联益光学有限公司 | Zoom lens |
-
2012
- 2012-01-20 CN CN 201220025861 patent/CN202615024U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103813139A (en) * | 2013-12-31 | 2014-05-21 | 南宁市公安局 | Vehicle-mounted monitoring device |
| CN105607234A (en) * | 2016-01-07 | 2016-05-25 | 东莞市宇瞳光学科技股份有限公司 | Super-high-definition fish-eye camera lens |
| CN114690388A (en) * | 2022-06-01 | 2022-07-01 | 江西联益光学有限公司 | Zoom lens |
| CN114690388B (en) * | 2022-06-01 | 2022-10-21 | 江西联益光学有限公司 | Zoom lens |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121219 Termination date: 20140120 |