CN207650480U - A kind of special imaging lens of muddy water - Google Patents
A kind of special imaging lens of muddy water Download PDFInfo
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- CN207650480U CN207650480U CN201721507590.2U CN201721507590U CN207650480U CN 207650480 U CN207650480 U CN 207650480U CN 201721507590 U CN201721507590 U CN 201721507590U CN 207650480 U CN207650480 U CN 207650480U
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Abstract
A kind of special imaging lens of muddy water are provided with lens barrel, external motor, the underwater optics system being sealed in lens barrel, underwater optics system relative aperture 1/1.6,71 ° of focal length f=3.5mm of underwater visual field；Underwater optics system is provided with along light path incident angle：Watertight shell window, astigmatism cross filter, preceding negative group of lens, just organize lens, sensitive chip afterwards；Preceding negative group of lens strength is 0.042；Just group lens strength is 0.072 afterwards；Preceding negative group of lens are provided with preceding group of meniscus lens, preceding group of biconcave lens and preceding group of meniscus lens；Just group lens are provided with rear group of meniscus lens, aperture diaphragm, organize biconvex lens, glued negative lens, glued positive lens and rear group meniscus lens afterwards afterwards；And each lens are coated with the wide spectrum antireflective film that single side reflectivity is less than 0.5% within the scope of 400 700nm respectively, the contrast and resolution ratio of imaging can be improved in this optics.
Description
Technical field
The utility model is related to Underwater Imaging optical fields, more particularly to a kind of special imaging lens of muddy water.
Background technology
Underwater Imaging is that the mankind carry out underwater research, exploitation and the important means explored.Relative to traditional underwater sound
It learns, optics can acquire more intuitive, image and clearly underwater picture under water, be conducive to the detection and knowledge of submarine target
Not, therefore at the beginning of Underwater Imaging is born certainly it is just widely paid close attention to and is studied.
With deep and technology the development of research, aqueous medium is also increasingly clear to the negative effect of Underwater Imaging.
Studies have shown that being on the one hand strongly absorbed when light is propagated in water, the operating distance of underwater imaging system is greatly reduced；It is another
Side is scattered by strong forward and backward, is caused largely to scatter light and is entered detector and reduce the contrast of image, shadow
The clarity of imaging is rung.Its disturbance degree is lower for clear water, but for muddy water, such as river entrance, pond, water
The underwater environments such as aquaculture net cage are produced, there are a large amount of bulky grains to hang particle and suspended matter, these particles and suspended matter to light production
Raw strong scattering process, therefore muddy Underwater Imaging problems faced is more serious, strong influence Underwater Imaging
Application of the technology under muddy water.
Therefore, in view of the shortcomings of the prior art, providing a kind of special imaging lens of muddy water to overcome the deficiencies of the prior art very
For necessity.
Invention content
The purpose of this utility model is that providing a kind of special imaging lens of muddy water in place of avoiding the deficiencies in the prior art
Head, which can reach in muddy waters ought how Gui this special characteristic frequency be 70lp/
Mtf value, which is put, when mm, on axis reaches 0.7；Meridian and the average mtf value of sagitta of arc visual field are 0.7 when 0.707 visual field；Full filed is son
The average mtf value of noon and sagitta of arc visual field is 0.44 high imaging quality.
The above-mentioned purpose of the utility model is realized by following technological means.
A kind of special imaging lens of muddy water are provided, are provided with lens barrel, external motor, and including being sealed in lens barrel
Underwater optics system, underwater optics optical system relative aperture 1/1.6,71 ° of underwater visual field, focal length f=3.5mm；Underwater optics
System is provided with along light path incident angle：Watertight shell window, astigmatism cross filter, preceding negative group of lens, just organize lens, sensitive chip afterwards.
Specifically, negative group lens strength is -0.042 before above-mentioned；Just group lens strength is 0.072 afterwards, described underwater
Optics optical system focal length f=3.5mm.
Specifically, negative group lens are provided with before above-mentioned：Preceding group of meniscus lens, preceding group of biconcave lens and preceding group of meniscus lens；
Specifically, above-mentioned, just group lens are provided with afterwards：Meniscus lens, aperture diaphragm are organized afterwards, organize biconvex lens afterwards, is glued negative
Lens, glued positive lens and rear group meniscus lens；
Specifically, above-mentioned astigmatism crosses filter and the airspace of preceding group of meniscus lens is 3-5mm, preceding group of meniscus lens is with before
The airspace of group biconcave lens is 3-5mm, and the airspace of preceding group of biconcave lens and preceding group of meniscus lens is 7-9mm, preceding group
The airspace of meniscus lens and rear group meniscus lens is 1-2mm, and the rear meniscus lens and the airspace of aperture diaphragm organized is 3-
The airspace of 5mm, aperture diaphragm and rear group biconvex lens are 0.1-1mm, the rear air for organizing biconvex lens and glued negative lens
Between be divided into 0.5-1mm, the airspace of glued negative lens and glued positive lens is 0mm, glued positive lens and rear group meniscus lens
Airspace be 0-1mm, the rear meniscus lens and the airspace of sensitive chip organized is 6-7mm.
Preferably, astigmatism crosses the airspace of filter and preceding group of meniscus lens as 4mm, preceding group of meniscus lens and preceding group of concave-concave
The airspace of lens is 4mm, and the airspace of preceding group of biconcave lens and preceding group of meniscus lens is 8.3mm, preceding group of meniscus lens
Airspace with rear group of meniscus lens is 1.51mm, and the rear meniscus lens and the airspace of aperture diaphragm organized is 4.45mm, hole
Diameter diaphragm and the airspace of rear group biconvex lens are 0.5mm, and the rear airspace for organizing biconvex lens and glued negative lens is
The airspace of 0.7mm, glued negative lens and glued positive lens is 0mm, between glued positive lens and the air of rear group meniscus lens
It is divided into 0.51mm, the rear meniscus lens and the airspace of sensitive chip organized is 6.41mm.
Specifically, above-mentioned astigmatism, which crosses filter, is set as polarizing film or polarization film, the water is tightly attached in polarizing film fixation
The inside of close shell window.
Specifically, above-mentioned polarization film is plated on the inside of the watertight shell window.
Specifically, above-mentioned sensitive chip is set as CCD sensitive chips or CMOS sensitive chips
Specifically, group meniscus lens, preceding group of biconcave lens, preceding group of meniscus lens, afterwards group meniscus lens, aperture light before above-mentioned
Door screen organizes biconvex lens, glued negative lens, glued positive lens with rear group meniscus lens integral sealing in the sub- lens barrel in lens barrel afterwards
Interior, the sub- lens barrel mobile range is 1mm.
It is saturating that watertight shell window, astigmatism cross filter, preceding group of meniscus lens, preceding group of biconcave lens, preceding group of meniscus lens, rear group bent moon
Mirror, aperture diaphragm organize biconvex lens, glued negative lens, glued positive lens with rear group meniscus lens respectively in 400-700nm models afterwards
The wide spectrum antireflective film that single side reflectivity is less than 0.5% is coated in enclosing.
A kind of special imaging lens of muddy water of the utility model, including the underwater optics system that is sealed in lens barrel, institute
Underwater optics optical system is stated to be provided with along light path incident angle：Watertight shell window, astigmatism cross filter, preceding negative group of lens, just group afterwards
Lens, sensitive chip, preceding negative group of lens strength are -0.042；Just group lens strength is 0.072 afterwards；Preceding negative group of lens setting
Have：Preceding group of meniscus lens, preceding group of biconcave lens and preceding group of meniscus lens；Just group lens are provided with afterwards：Meniscus lens, aperture are organized afterwards
Diaphragm organizes biconvex lens, glued negative lens, glued positive lens and rear group meniscus lens afterwards；Astigmatism crosses filter and is set as polarizing film
Or polarization film, the polarizing film are fixed the inside for being tightly attached to the watertight shell window, can be prevented in muddy waters ventrocephalad
Enter image device with backward stray light, improves the contrast and resolution ratio of imaging.
Description of the drawings
The utility model is further described using attached drawing, but the content in attached drawing is not constituted to the utility model
Any restrictions.
Fig. 1 is underwater optics structure chart.
Fig. 2 is optical transfer function figure.
In Fig. 1 to Fig. 2, including：
Watertight shell window 1, astigmatism cross filter 2,
Preceding group of meniscus lens 3, preceding group of biconcave lens 4, preceding group of meniscus lens 5, rear group meniscus lens 6, aperture diaphragm 7, after
Group biconvex lens 8, glued negative lens 9, glued positive lens 10, rear group meniscus lens 11, sensitive chip 12.
Specific implementation mode
The utility model is further described with the following Examples.
Embodiment 1.
As shown in Fig. 1 to 2, a kind of special imaging lens of muddy water described in the utility model are provided with lens barrel, external electricity
Machine, and the underwater optics system including being sealed in lens barrel, underwater optics system relative aperture 1/1.6,71 ° of underwater visual field,
Focal length f=3.5mm；Underwater optics optical system is provided with along light path incident direction：Watertight shell window 1, astigmatism cross filter 2, preceding negative
Group lens just organize lens, sensitive chip 12 afterwards.
By the way that underwater optics system relative aperture is set as 1/1.6,71 ° of underwater visual field, when can improve underwater camera
Wait the compensation and utilization of underwater luminous energy.
Above-mentioned, preceding negative group of lens strength is -0.042；Just group lens strength is 0.072 afterwards；
Above-mentioned, preceding negative group of lens are provided with preceding group of meniscus lens 3, preceding group of biconcave lens 4 and preceding group of meniscus lens 5；
Above-mentioned, just group lens are provided with rear group of meniscus lens 6, aperture diaphragm 7, rear group biconvex lens 8, glued negative lens afterwards
9, glued positive lens 10 and rear group meniscus lens 11.
Above-mentioned, it is double for 4mm, preceding group of meniscus lens 3 and preceding group that astigmatism crosses the airspace of filter 2 and preceding group of meniscus lens 3
The airspace of concavees lens 4 is 4mm, and the airspace of preceding group of biconcave lens 4 and preceding group of meniscus lens 5 is 8.3mm, preceding group of bent moon
Lens 5 and the airspace of rear group meniscus lens 6 are 1.51mm, organize meniscus lens 6 afterwards and the airspace of aperture diaphragm 7 is
4.45mm, aperture diaphragm 7 and the airspace of rear group biconvex lens 8 are 0.5mm, rear to organize biconvex lens 8 and glued negative lens 9
Airspace is 0.7mm, and glued negative lens 9 and the airspace of glued positive lens 10 are 0mm, and glued positive lens 10 is organized curved with after
The moon, the airspace of lens 11 was 0.51mm, and the rear meniscus lens 11 and the airspace of sensitive chip 12 organized is 6.41mm.
Above-mentioned, astigmatism crosses filter 2 and is set as polarizing film；Under water in addition to correct related spherical aberration and coma with aperture
Outside, it also to correct and the off-axis aberration such as the relevant astigmatism of visual field, coma, astigmatism, the curvature of field, distortion.In addition it is necessary to correct color
Difference, such as axial chromatic aberration and chromatic longitudiinal aberration.
Underwater forward and backward stray light when being prevented under water by the way that polarizing film is arranged enters image device, Jin Erti
The high contrast and resolution ratio of imaging.
Above-mentioned polarizing film fixes the inside for being tightly attached to watertight shell window, and polarizing film is set as circular polarizing disk.
Above-mentioned, sensitive chip 2 is set as CCD sensitive chips.
It is above-mentioned, preceding group of meniscus lens 3, preceding group of biconcave lens 4, preceding group of meniscus lens 5, rear group meniscus lens 6, aperture diaphragm
7, biconvex lens 8, glued negative lens 9, glued positive lens 10 are organized afterwards with rear 11 integral sealing of meniscus lens of organizing in the son in lens barrel
In lens barrel, sub- lens barrel mobile range is 1mm.External motor is fixed with outside lens barrel, external motor by being connect with sub- lens barrel, and
The overall movement of sub- lens barrel is controlled after being powered up, and screens is being provided at sub- lens barrel front and back position 1mm in lens barrel, from
And the overall movement of siding stopping lens barrel, the mobile range of sub- lens barrel can be kept efficient for 1mm convenient for camera lens is underwater
Clarity, the present embodiment has been for public institute about the mobile control between lens barrel, motor and the sub- lens barrel in pick-up lens
The common knowledge known, concrete structure just repeat no more.
It is above-mentioned, watertight shell window, astigmatism cross filter, preceding group of meniscus lens, preceding group of biconcave lens, preceding group of meniscus lens, rear group
Meniscus lens organizes biconvex lens, glued negative lens, glued positive lens with rear group meniscus lens respectively in 400-700nm ranges afterwards
Inside it is coated with the wide spectrum antireflective film that single side reflectivity is less than 0.5%.
By experimental data functional arrangement show when how Gui this special characteristic frequency is 70lp/mm when, point mtf value reaches on axis
0.7；Meridian and the average mtf value of sagitta of arc visual field are 0.7 when 0.707 visual field；Full filed is meridian and the average MTF of sagitta of arc visual field
Value is 0.44.Show the camera lens there is higher image quality, the maximum distortion of this optical system to be -10%.
The contrast and resolution ratio of imaging can be improved in this optics, it is therefore prevented that underwater forward and backward stray light enters imager
The contrast and resolution ratio of imaging can be improved in part.
Embodiment 2.
A kind of special imaging lens of muddy water, other structures are same as Example 1, the difference is that：Astigmatism crosses filter 2
It is set as polarization film；By the way that polarization film is affixed on watertight shell window, the transmitance of light is further improved.
Embodiment 3.
A kind of special imaging lens of muddy water, other structures are identical as embodiment 1 or 2, the difference is that：The present embodiment
It is saturating that middle watertight shell window 1, astigmatism cross filter 2, preceding group of meniscus lens 3, preceding group of biconcave lens 4, preceding group of meniscus lens 5, rear group bent moon
Mirror 6, rear group biconvex lens 8, gluing negative lens 9, glued positive lens 10 and rear group meniscus lens 11 divide within the scope of 400-700nm
It is not provided with the wide spectrum antireflective film that single side reflectivity is less than 0.5%, by plating wide spectrum antireflective film by the increasing in each lens
Add the transmitance of light so that the reflectivity of the single lens between original lens decreases below 5% range, improves this light
The image quality of system.
Finally it should be noted that above example is only to illustrate the technical solution of the utility model rather than to this practicality
The limitation of novel protected range, although being explained in detail to the utility model with reference to preferred embodiment, the common skill of this field
Art personnel, which should be appreciated that, to be modified or replaced equivalently the technical solution of the utility model, without departing from this practicality
The spirit and scope of new technique scheme.
Claims (8)
1. a kind of special imaging lens of muddy water, are provided with lens barrel, external motor, it is characterised in that：Further include being sealed in lens barrel
Interior underwater optics system, the underwater optics system relative aperture 1/1.6,71 ° of underwater visual field, focal length f=3.5mm；It is described
Underwater optics system is disposed with along light path incident direction：Watertight shell window, astigmatism are crossed filter, preceding negative group of lens, are just being organized afterwards thoroughly
Mirror and sensitive chip；Negative group lens strength is -0.042 before described；Just group lens strength is 0.072 afterwards；
Negative group lens are provided with preceding group of meniscus lens, preceding group of biconcave lens and preceding group of meniscus lens before described；
It is described that just group lens are provided with rear group of meniscus lens, aperture diaphragm, are organizing biconvex lens, glued negative lens, gluing afterwards just afterwards
Lens and rear group meniscus lens.
2. the special imaging lens of a kind of muddy water according to claim 1, it is characterised in that：Astigmatism crosses filter and preceding group curved
The airspace of month lens is 3-5mm, the airspace of preceding group of meniscus lens and preceding group of biconcave lens is 3-5mm, preceding group of concave-concave
The airspace of lens and preceding group of meniscus lens is 7-9mm, and the airspace of preceding group of meniscus lens and rear group meniscus lens is 1-
2mm, the rear meniscus lens and the airspace of aperture diaphragm organized is 3-5mm, the airspace of aperture diaphragm and rear group biconvex lens
For 0.1-1mm, the rear biconvex lens and the airspace of glued negative lens organized is 0.5-1mm, glued negative lens and glued positive lens
Airspace be 0mm, the airspace of glued positive lens and rear group meniscus lens is 0-1mm, it is rear organize meniscus lens with it is photosensitive
The airspace of chip is 6-7mm.
3. the special imaging lens of a kind of muddy water according to claim 2, it is characterised in that：Astigmatism crosses filter and preceding group curved
The airspace of month lens is 4mm, the airspace of preceding group of meniscus lens and preceding group of biconcave lens is 4mm, preceding group of biconcave lens
Airspace with preceding group of meniscus lens is 8.3mm, and the airspace of preceding group of meniscus lens and rear group meniscus lens is 1.51mm,
The airspace for organizing meniscus lens and aperture diaphragm afterwards is 4.45mm, and the airspace of aperture diaphragm and rear group biconvex lens is
0.5mm, the rear biconvex lens and the airspace of glued negative lens organized is 0.7mm, the air of glued negative lens and glued positive lens
Between be divided into 0mm, the airspace of glued positive lens and rear group meniscus lens is 0.51mm, rear meniscus lens and the sensitive chip organized
Airspace is 6.41mm.
4. the special imaging lens of a kind of muddy water according to claim 3, it is characterised in that：The astigmatism crosses filter setting
For polarizing film or polarization film；
The polarizing film fixes the inside for being tightly attached to the watertight shell window,
The polarization film is plated on the inside of the watertight shell window.
5. the special imaging lens of a kind of muddy water according to claim 4, it is characterised in that：The polarizing film is set as round
Polarizing film or linear polarizer.
6. the special imaging lens of a kind of muddy water according to claim 5, it is characterised in that：The sensitive chip is set as
CCD sensitive chips or CMOS sensitive chips.
7. the special imaging lens of a kind of muddy water according to claim 6, it is characterised in that：The preceding group meniscus lens,
Preceding group of biconcave lens, preceding group of meniscus lens organize meniscus lens, aperture diaphragm, organize biconvex lens, glued negative lens, gluing afterwards afterwards
For positive lens with rear group meniscus lens integral sealing in the sub- lens barrel in lens barrel, the sub- lens barrel mobile range is 1mm.
8. the special imaging lens of a kind of muddy water according to claim 7, it is characterised in that：Watertight shell window, astigmatism filtering
Mirror, preceding group of biconcave lens, preceding group of meniscus lens, organizes meniscus lens, organizes biconvex lens afterwards, is glued negative saturating preceding group of meniscus lens afterwards
Mirror, glued positive lens and rear group meniscus lens are coated with the wide light that single side reflectivity is less than 0.5% within the scope of 400-700nm respectively
Compose antireflective film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721507590.2U CN207650480U (en) | 2017-11-13 | 2017-11-13 | A kind of special imaging lens of muddy water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721507590.2U CN207650480U (en) | 2017-11-13 | 2017-11-13 | A kind of special imaging lens of muddy water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207650480U true CN207650480U (en) | 2018-07-24 |
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ID=62888417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721507590.2U Expired - Fee Related CN207650480U (en) | 2017-11-13 | 2017-11-13 | A kind of special imaging lens of muddy water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207650480U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113238351A (en) * | 2021-04-19 | 2021-08-10 | 影石创新科技股份有限公司 | Polarization type optical lens structure and imaging device |
| CN114035306A (en) * | 2021-11-26 | 2022-02-11 | 东莞市融光光学有限公司 | Underwater wide-angle lens imaging system |
-
2017
- 2017-11-13 CN CN201721507590.2U patent/CN207650480U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113238351A (en) * | 2021-04-19 | 2021-08-10 | 影石创新科技股份有限公司 | Polarization type optical lens structure and imaging device |
| CN114035306A (en) * | 2021-11-26 | 2022-02-11 | 东莞市融光光学有限公司 | Underwater wide-angle lens imaging system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180724 Termination date: 20211113 |
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| CF01 | Termination of patent right due to non-payment of annual fee |