CN203909386U - Underwater special-purpose imaging wide-angle lens - Google Patents
Underwater special-purpose imaging wide-angle lens Download PDFInfo
- Publication number
- CN203909386U CN203909386U CN201420054048.6U CN201420054048U CN203909386U CN 203909386 U CN203909386 U CN 203909386U CN 201420054048 U CN201420054048 U CN 201420054048U CN 203909386 U CN203909386 U CN 203909386U
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- lens
- angle
- negative
- imaging wide
- light path
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Abstract
The utility model brings forward an underwater special-purpose imaging wide-angle lens. The underwater special-purpose imaging wide-angle lens comprises a front concave set lens, and a rear convex set lens that is positioned on the same optical path with the front concave set lens. Each of the front concave set lens and the rear convex set lens includes at least four spherical lenses that are positioned on the same optical path. The underwater special-purpose imaging wide-angle lens is capable of monitoring and shooting in real-time, the horizontal angle of visual field being equal to or greater than 75 degrees, the vertical field of view being equal to or greater than 60 degrees, and the diagonal angle of visual field being equal to or greater than 85.3 degrees.
Description
Technical field
The utility model relates to optical field, relates in particular to the special wide-angle optical imaging system using in a kind of rugged surroundings under water.
Background technology
Along with the development of undersea detection technology, monitor in the urgent need to the process of multiple target transmittings is carried out to multi-angle, large visual field, thereby understand further the motion conditions in moving target emission process, understand moving target surrounding environment change situation.
Conventionally the Underwater Imaging camera lens adopting can only be monitored in real time the moving target within the scope of small field of view or carry out low-angle shooting, applicable occasion is limited, and need to possess for the transmitting motion state of Real-Time Monitoring underwater high-speed moving target is the special image-forming objective lens under water of a large visual field, object lens of large relative aperture.
Utility model content
In order to solve existing technical matters in background technology, the utility model proposes one special imaging wide-angle lens under water, underwater photograph technical horizontal field of view angle >=75 ° are realized, vertical field of view >=60 °, Real-Time Monitoring and the shooting of diagonal line field angle >=85.3 °.
Technical solution of the present utility model is: special imaging wide-angle lens under water, comprise front negative group of lens and be positioned at the rear lens of just organizing of same light path with front negative group of lens, it is characterized in that: described front negative group of lens and the rear lens of just organizing include at least four spherical mirrors that are positioned at same light path.
Above-mentioned front negative group of lens comprise the optical window, the first negative lens, the second negative lens, the first positive lens, the 3rd negative lens that are positioned at successively same light path; The described rear lens of just organizing comprise the second positive lens, the 4th negative lens, the 3rd positive lens, the 4th positive lens, the 5th positive lens that are positioned at successively same light path.
The maximum effective aperture 130mm of above-mentioned camera lens, F number 1.6, camera lens overall length is 198mm;
Above-mentioned optical window is the concentric circles window of adopting quartz glass.
The utility model has the advantages that: the leeway that automaticity is high, focusing speed is fast, imaging good, aperture is large, camera lens group is many, select is large etc.Not only can realize the effective control to off-axis aberration but also can meet by such topology layout and under the prerequisite of little focal length, still have larger rear cut-off distance.In addition, adopted the glass of more high index of refraction, low dispersion for proofreading and correct the spherical aberration causing due to large aperture.Camera lens of the present utility model has been realized underwater photograph technical horizontal field of view angle >=75 °, vertical field of view >=60 °, Real-Time Monitoring and the shooting of diagonal line field angle >=85.3 °.
Brief description of the drawings
Fig. 1 is principle schematic of the present utility model;
Fig. 2 is structural representation of the present utility model;
Fig. 3 is the optical transfer function figure of the utility model optical system;
Fig. 4 is 5 meters of optical transfer function figure of infinite object distance;
Fig. 5 is 0.5 meter of optical transfer function figure of infinite object distance;
Embodiment
As shown in Figure 1, the utility model under water special imaging wide-angle lens has adopted the reflective structure far away of taking the photograph, this structure is made up of front negative group of lens 1 and the rear lens 2 of just organizing, the concentric circles window that optical window 3 adopting quartz glass are material, this class window is less than the loss of plane window visual field, dependable performance, anti-pressure ability is strong.Its weak point is higher to the technological requirement of processing and assembling, and maintenance cost is higher, being widely used in relevant item in the past.Show that through practice this sealed window is reasonable.
Fig. 2 is the structural drawing of optical system, adopts 10 spherical mirrors to be positioned at same light path; Front negative group lens 1 comprise optical window 3, the first negative lens 4, the second negative lens 5, the first positive lens 6, the 3rd negative lens 7; After just organizing lens 2 and comprising the second positive lens 8, the 4th negative lens 9, the 3rd positive lens 10, the 4th positive lens 11, the 5th positive lens 12 that are positioned at successively same light path; The maximum effective aperture 130mm of camera lens, F number is 1.6; Camera lens overall length is 198mm.
Fig. 3 is the MTF figure of optical system, and MTF has represented the transmission capacity of optical system to target contrast, and its value is higher shows that aberration control is better.Because the minimum pixel of CCD is 22 μ m, its corresponding spatial frequency is 23lp/mm, for optical system is mated with CCD, must carry out actual investigation with the spatial frequency of 23lp/mm.Shown in Fig. 3, the MTF of 0.707 visual field under this spatial frequency, higher than 0.3 minimum process required value, can meet actual work requirements.
Optical system designs by infinite distance, and is limited distance when actual use.For the imaging definition camera lens that meets limited distance must be focused.Owing to having adopted spherical shell window himself to have a focal power, this window is irremovable in actual use, cannot be by mobile whole mirror group while therefore focusing.On this lens construction, adopted front and rear mirror group structure, front group of focal length be for negative, and rear group of focal length is for just.Can realize lens focusing by the distance changing between rear group and front group.Optical transfer function figure when Fig. 4,5 is respectively 5 meters of infinite object distances and 0.5 meter, now the amount of movement of group is respectively 0.092mm and 0.25mm afterwards.
In actual use, only need special imaging wide-angle lens to be under water sealed in seal casinghousing, then system is placed on to target area to be measured, can complete Real-Time Monitoring and shooting.Optical system is simple and practical, easy to operate, and can complete in real time wide-angle monitoring under water and take.
Claims (3)
1. special imaging wide-angle lens under water, comprises front negative group of lens and is positioned at the rear lens of just organizing of same light path with front negative group of lens, it is characterized in that: described front negative group of lens and the rear lens of just organizing include at least four spherical mirrors that are positioned at same light path; Described front negative group of lens comprise the optical window, the first negative lens, the second negative lens, the first positive lens, the 3rd negative lens that are positioned at successively same light path; The described rear lens of just organizing comprise the second positive lens, the 4th negative lens, the 3rd positive lens, the 4th positive lens, the 5th positive lens that are positioned at successively same light path.
2. special imaging wide-angle lens under water according to claim 1, is characterized in that: the maximum effective aperture 130mm of described camera lens, and F number 1.6, camera lens overall length is 198mm.
3. special imaging wide-angle lens under water according to claim 2, is characterized in that: described optical window is the concentric circles window of adopting quartz glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420054048.6U CN203909386U (en) | 2014-01-27 | 2014-01-27 | Underwater special-purpose imaging wide-angle lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420054048.6U CN203909386U (en) | 2014-01-27 | 2014-01-27 | Underwater special-purpose imaging wide-angle lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203909386U true CN203909386U (en) | 2014-10-29 |
Family
ID=51783647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420054048.6U Expired - Fee Related CN203909386U (en) | 2014-01-27 | 2014-01-27 | Underwater special-purpose imaging wide-angle lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203909386U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103744165A (en) * | 2014-01-27 | 2014-04-23 | 中国科学院西安光学精密机械研究所 | Special underwater imaging wide-angle lens |
| CN105974562A (en) * | 2016-07-20 | 2016-09-28 | 广东弘景光电科技股份有限公司 | Fisheye monitoring optical system and applied lens thereof |
| CN109116515A (en) * | 2018-09-18 | 2019-01-01 | 福建师范大学 | A kind of big target surface phtographic lens of underwater ultra-wide angle |
-
2014
- 2014-01-27 CN CN201420054048.6U patent/CN203909386U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103744165A (en) * | 2014-01-27 | 2014-04-23 | 中国科学院西安光学精密机械研究所 | Special underwater imaging wide-angle lens |
| CN103744165B (en) * | 2014-01-27 | 2017-02-15 | 中国科学院西安光学精密机械研究所 | special underwater imaging wide-angle lens |
| CN105974562A (en) * | 2016-07-20 | 2016-09-28 | 广东弘景光电科技股份有限公司 | Fisheye monitoring optical system and applied lens thereof |
| CN105974562B (en) * | 2016-07-20 | 2018-08-28 | 广东弘景光电科技股份有限公司 | Flake monitors the camera lens of optical system and its application |
| CN109116515A (en) * | 2018-09-18 | 2019-01-01 | 福建师范大学 | A kind of big target surface phtographic lens of underwater ultra-wide angle |
| CN109116515B (en) * | 2018-09-18 | 2021-04-27 | 福建师范大学 | Underwater ultra-wide-angle large-target-surface photographic lens |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20170127 |