CN208351112U - A kind of ultra-wide angle underwater low-light-level imaging camera lens - Google Patents
A kind of ultra-wide angle underwater low-light-level imaging camera lens Download PDFInfo
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- CN208351112U CN208351112U CN201821051761.XU CN201821051761U CN208351112U CN 208351112 U CN208351112 U CN 208351112U CN 201821051761 U CN201821051761 U CN 201821051761U CN 208351112 U CN208351112 U CN 208351112U
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- 239000005304 optical glass Substances 0.000 claims abstract description 4
- 230000003287 optical effect Effects 0.000 claims description 27
- 239000011521 glass Substances 0.000 claims description 6
- 239000005308 flint glass Substances 0.000 claims description 2
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Abstract
The utility model relates to technical field of imaging more particularly to a kind of ultra-wide angle underwater low-light-level imaging camera lens, including mirror head outer shell, the optical glass being arranged successively from the object side to the image side in the mirror head outer shell includes: the first lens, the meniscus shaped lens with negative power；Second lens, the double concave type lens with negative power；The third lens, the lenticular lens with positive light coke；4th lens, the lenticular lens with positive light coke；5th lens, the meniscus shaped lens with negative power；6th lens, the lenticular lens with positive light coke；7th lens, the lenticular lens with positive light coke；8th lens, the lenticular lens with positive light coke；9th lens, the double concave type lens with negative power；5th lens are connect with the 6th lens gluing, and the 8th lens are connect with the 9th lens gluing；In addition between the 5th lens and the 6th lens and between the 8th lens and the 9th lens, using air as medium between remaining two neighboring lens.
Description
Technical field
The utility model relates to technical field of imaging more particularly to a kind of ultra-wide angle underwater low-light-level imaging camera lenses.
Background technique
Underwater Imaging technology plays an important role in the fields such as ocean development and engineering, underwater scientific investigation.Many institute's weeks
Know, the mankind normally descend water depth within 40 meters, and a small number of technology divings can reach 70 meters or more.The whole nation possesses technology diving money
The personnel of lattice are extremely rare, and the underwater operation in China at present, ocean underwater photograph technical are mainly accomplished manually by diver, under
Water depth and underwater environment all have huge limitation to diver's underwater operation quality, are unable to meet demand.Therefore underwater machine
Thus device people just arises.However, the equipment currently used for underwater photography is not the Underwater Imaging camera lens of profession, but
Imaging lens used in air.Since air and both medium characters of water are entirely different, photographic equipment is caused to be clapped under water
There is sharp fall in image quality when taking the photograph.
Wherein influence of the water to optical imagery is mainly in the following aspects: 1, transmission of the water body to the light wave of different spectral
Rate is different, the transmitance highest of bluish-green wave band in general water body；2, the illuminance in certain depth in water is extremely low；3, in water
Scattering phenomenon affect the clarity of imaging；4, the field angle of camera lens can significantly reduce in water；5, camera lens in water
The depth of field can be less than general camera lens.
Influence based on water body set forth above to lens imaging, therefore a kind of ultra-wide angle, large aperture, big target are needed at present
The underwater low-light-level imaging camera lens in face, for underwater robot use.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of ultra-wide angle, large aperture, big target surface underwater low-light
Imaging lens, for underwater robot use.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model are as follows:
A kind of ultra-wide angle underwater low-light-level imaging camera lens, including mirror head outer shell, in the mirror head outer shell from the object side to the image side according to
The optical glass of secondary arrangement includes:
First lens, the meniscus shaped lens with negative power；
Second lens, the double concave type lens with negative power；
The third lens, the lenticular lens with positive light coke；
4th lens, the lenticular lens with positive light coke；
5th lens, the meniscus shaped lens with negative power；
6th lens, the lenticular lens with positive light coke；
7th lens, the lenticular lens with positive light coke；
8th lens, the lenticular lens with positive light coke；
9th lens, the double concave type lens with negative power；
Wherein, the 5th lens are connect with the 6th lens gluing, and the 8th lens are connect with the 9th lens gluing；It removes
It is outer between 5th lens and the 6th lens and between the 8th lens and the 9th lens, remaining two neighboring lens it
Between using air as medium.
The utility model has the beneficial effects that:
A kind of ultra-wide angle underwater low-light-level imaging camera lens provided by the utility model, by selecting suitable glasses combination of materials,
Reasonable distribution optical system focal power adjusts the deflection of light of each lens surface, balances various pieces optical aberration, improves
The performance parameter of optical system.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of ultra-wide angle underwater low-light-level imaging camera lens of the utility model；
Fig. 2 is a kind of optical transfer function figure of ultra-wide angle underwater low-light-level imaging camera lens of the utility model；
Fig. 3 is the curvature of field and distortion figure of a kind of ultra-wide angle underwater low-light-level imaging camera lens of the utility model；
Fig. 4 is a kind of chromatic longitudiinal aberration figure of ultra-wide angle underwater low-light-level imaging camera lens of the utility model；
Label declaration:
1, the first lens；2, the second lens；3, the third lens；4, the 4th lens；5, the 5th lens；6, the 6th lens；7,
7th lens；8, the 8th lens；9, the 9th lens.
Specific embodiment
For technology contents, the objects and the effects that the utility model is described in detail, below in conjunction with embodiment and match
Attached drawing is closed to be explained.
The design of the utility model most critical is: by selecting suitable glasses combination of materials, reasonable distribution optical system
Focal power adjusts the deflection of light of each lens surface, balances various pieces optical aberration, improves the performance ginseng of optical system
Number.
Fig. 1-4, a kind of ultra-wide angle underwater low-light-level imaging camera lens provided by the utility model, including mirror head outer shell are please referred to,
The optical glass being arranged successively from the object side to the image side in the mirror head outer shell includes:
First lens 1, the meniscus shaped lens with negative power；
Second lens 2, the double concave type lens with negative power；
The third lens 3, the lenticular lens with positive light coke；
4th lens 4, the lenticular lens with positive light coke；
5th lens 5, the meniscus shaped lens with negative power；
6th lens 6, the lenticular lens with positive light coke；
7th lens 7, the lenticular lens with positive light coke；
8th lens 8, the lenticular lens with positive light coke；
9th lens 9, the double concave type lens with negative power；
Wherein, the 5th lens are connect with the 6th lens gluing, and the 8th lens are connect with the 9th lens gluing；It removes
It is outer between 5th lens and the 6th lens and between the 8th lens and the 9th lens, remaining two neighboring lens it
Between using air as medium.
The following are lens parameters in optical system:
| Lens serial number | Focal length | Refractive index | Abbe number |
| 1 | -10<f<-9 | 1.72<Nd1<1.83 | 42.7<Vd1<54.8 |
| 2 | -8.5<f<-7.5 | 1.67<Nd2<1.71 | 53.3<Vd2<56.2 |
| 3 | 17.8<f<18.9 | 1.62<Nd3<1.71 | 41.1<Vd3<53.2 |
| 4 | 18.9<f<20.1 | 1.85<Nd4<1.92 | 32.3<Vd4<37.1 |
| 5 | -46.2<f<-43.5 | 1.64<Nd5<1.76 | 25.2<Vd5<33.8 |
| 6 | -8.5<f<-7.5 | 1.48<Nd6<1.65 | 60.2<Vd6<81.7 |
| 7 | 18.3<f<19.5 | 1.8<Nd7<1.90 | 37.2<Vd7<46.7 |
| 8 | 28.5<f<30.8 | 1.62<Nd8<1.67 | 55.5<Vd8<63.5 |
| 9 | -33.8<f<-31.5 | 1.78<Nd9<1.87 | 20.8<Vd9<26.1 |
Table 1
F in upper table 1 indicates that focal length, Nd indicate refractive index, and Vd indicates Abbe number.First lens, 1 table of lens serial number
To show, the second lens lens serial number 2 indicates, and so on.
In the present embodiment, the refractive index of first lens be 1.72 < Nd1 < 1.83, Abbe number be 42.7 < Vd1 <
54.8, the one side of first lens towards object plane is convex lens, the one side of first lens and the second lens light connects
For concave lens；The refractive index of second lens be 1.67 < Nd2 < 1.71, Abbe number be 53.3 < Vd2 < 56.2, described second
The one side of lens and the first lens light connects is concave lens, and the one side of second lens and the third lens light connects is concave surface
Lens；
Above-mentioned the first lens and the second lens use the material of high refractive index, assume responsibility for biggish negative power, increase
The incidence angle of off-axis ray also makes the off-axis ray of big field angle after preceding group of eyeglass, and light quickly reduces with optical axis included angle,
To reduce the off-axis aberration that rear group of microscope group undertakes, be conducive to the aberration balancing of entire optical system.
In the present embodiment, the refractive index of the third lens be 1.62 < Nd3 < 1.71, Abbe number be 41.1 < Vd3 <
53.2, the one side of the third lens and the second lens light connects is convex lens, and the third lens and the 4th lens light connect
The one side connect is convex lens；The third lens are thick lens；The refractive index of 4th lens is 1.85 < Nd4 < 1.92,
Abbe number is 32.3 < Vd4 < 37.1, and the one side of the 4th lens and the third lens light connects is convex lens, and the described 4th thoroughly
The one side of mirror and the 5th lens light connects is convex lens；4th lens are thick lens；
Above-mentioned the third lens and the 4th lens are biconvex drum type thick lens, rationally assume responsibility for preceding group of biggish positive light focus
Degree, so that optical system overall structure is more compact, light will not generate biggish deflection angle on eyeglass, be conducive to reduce high
The generation of grade aberration is conducive to the relative aperture for improving optical system.
In the present embodiment, the refractive index of the 5th lens be 1.64 < Nd5 < 1.76, Abbe number be 25.2 < Vd5 <
33.8, the one side of the 5th lens and the 4th lens light connects is convex lens, the 5th lens and the 6th lens light company
The one side connect is concave lens；The refractive index of 6th lens is 1.48 < Nd6 < 1.65, and Abbe number is 60.2 < Vd6 < 81.7,
The one side of 6th lens and the 5th lens light connects be convex lens, the one of the 6th lens and the 7th lens light connects
Face is convex lens；
The 5th above-mentioned lens and the 6th lens are glued, and the 5th lens are the flint glass of high-refractivity and low-dispersion, and the 6th
Lens are ED glass, and two kinds of Refractive Index of Material high level matches with low level greatly correct the spherical aberration and color difference of the generation of front microscope group, improve
The resolution ratio of imaging.
In the present embodiment, the refractive index of the 7th lens be 1.8 < Nd7 < 1.90, Abbe number be 37.2 < Vd7 <
46.7, the one side of the 7th lens and the 6th lens light connects is convex lens, the 7th lens and the 8th lens light company
The one side connect is convex lens；
The positive curvature of field that the 7th above-mentioned lens generate balances the negative curvature of field of preceding group of generation, while lens powers are smaller,
It is remaining that too big spherical aberration will not be generated, be conducive to the correction of aberration.
In the present embodiment, the refractive index of the 8th lens be 1.62 < Nd8 < 1.67, Abbe number be 55.5 < Vd8 <
63.5, the one side of the 8th lens and the 7th lens light connects is convex lens, the 8th lens and the 9th lens light company
The one side connect is convex lens；The refractive index of 9th lens is 1.78 < Nd9 < 1.87, and Abbe number is 20.8 < Vd9 < 26.1,
The one side of 9th lens and the 8th lens light connects is concave lens, and the 9th lens are recessed with the one side towards image planes
Face lens.
The 8th above-mentioned lens and the 9th lens are glue pellet, reduce color by the combination of high low-refraction and Abbe number
Difference generates biggish negative-appearing image simultaneously and dissipates the positive astigmatism that balance front optical constituent element generates, and improves the clarity of imaging.
Entire optical system improves the wave band of work by rationally designing the reasonable combination application with glass material, meets
The use demand of ultra-wide angle and large aperture, increases the depth of field that camera lens is imaged in water, camera lens is made to can satisfy underwater photography
Needs, it is ensured that underwater image quality.
In the utility model case study on implementation, the whole focal length value of the optical lens is EFL, f-number FNO, field angle
For FOV, camera lens overall length TTL, and by object space side, by each mirror surface number consecutively, the mirror surface of the first lens 1 is r1, r2, the
The mirror surface of two lens 2 is r3, r4, and the mirror surface of the third lens 3 is r5, r6, and the mirror surface of the 4th lens 4 is r7, r8, the 5th lens 5
Mirror surface be r9, r10, the mirror surfaces of the 6th lens 6 is r10, r11, and the mirror surface of the 7th lens 7 is r12, r13, the 8th lens 8
Mirror surface is r14, r15, and the mirror surface of the 9th lens 9 is r15, r16.Wherein the cemented surface of the 5th lens 5 and the 6th lens 6 is r10,
The cemented surface of 8th lens 8 and the 9th lens 9 is r15.
The utility model preferred parameter value (table 2)
EFL=2.9mm, FNO=1.6, FOV=180 ° (in air)/137 ° (in water)；
TTL < 35mm, image planes diameter=8.5mm；
| Face serial number | Radius of curvature R | Center thickness D | Refractive index Nd | Abbe number Vd |
| r1 | 29.97 | 2.97 | 1.77 | 49.6 |
| r2 | 5.72 | 5.47 | ||
| r3 | -10.9 | 2.61 | 1.69 | 54.9 |
| r4 | 12.77 | 1.04 | ||
| r5 | 73.5 | 3.57 | 1.67 | 48.4 |
| r6 | -14.85 | 0.2 | ||
| r7 | 20.29 | 3.04 | 1.91 | 35.3 |
| r8 | -127.25 | 0.13 | ||
| r9 | 15.63 | 2.92 | 1.73 | 28.3 |
| r10 | 5.39 | 2.75 | 1.59 | 68.5 |
| r11 | -22.96 | 4.25 | ||
| r12 | 30.15 | 1.38 | 1.83 | 42.7 |
| r13 | 30.15 | 0.12 | ||
| r14 | 10.97 | 3 | 1.64 | 60.2 |
| r15 | -8.2 | 1.23 | 1.85 | 23.8 |
| r16 | -275.29 | 3.7 |
Table 2
Preferred parameter value can be obtained according to above-mentioned table 2, the refractive index of first lens is 1.77, Abbe number 49.6；Institute
The refractive index for stating the second lens is 1.69, Abbe number 54.9；The refractive index of the third lens is 1.67, and Abbe number is
48.4；The refractive index of 4th lens is 1.91, Abbe number 35.3；The refractive index of 5th lens is 1.73, Abbe
Number is 28.3；The refractive index of 6th lens is 1.59, Abbe number 68.5；The refractive index of 7th lens is 1.83,
Abbe number is 42.7；The refractive index of 8th lens is 1.64, Abbe number 60.2；The refractive index of 9th lens is
1.85, Abbe number 23.8.
Further, first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens,
Seven lens, the 8th lens and the 9th lens are coaxially disposed, convenient for the operation such as optical computing, matching.
Along optical path incident direction, the airspace between every two adjacent lens is successively are as follows: the first lens and second are thoroughly
5.47mm is divided between mirror center air；1.05mm is divided between second lens and the third lens center air；The third lens and the 4th
Lens centre airspace is 0.2mm；4th lens and the 5th lens centre airspace are 0.13mm；6th lens and the 7th
Lens centre airspace is 4.29mm；7th lens and the 8th lens centre airspace are 0.12mm.
Fig. 2 is the optical transfer function figure of ultra-wide angle underwater low-light-level imaging camera lens, can characterize the resolution ratio of camera lens；It is wherein horizontal
Reference axis representation space frequency, unit lp/mm, i.e., the every millimeter black and white strip logarithm that can be differentiated, axis of ordinates indicate to pass
Functional value, numerical value is bigger, and expression camera lens resolution capability is better.The not collinear transfer curve for indicating different field angles.
Fig. 3 is the curvature of field and distortion figure of ultra-wide angle underwater low-light-level imaging camera lens；Wherein left figure is shot field curvature figure, shows mirror
The smooth degree of different operating wavelength imaging, the image quality of reaction shot in head.Right figure is camera lens f-theta distortion figure, table
Show that the distortion percentage under camera lens difference field angle, upper figure indicate that maximum f-theta distortion is 12%.
Fig. 4 is the chromatic longitudiinal aberration figure of ultra-wide angle underwater low-light-level imaging camera lens, can characterize the colour correction ability of camera lens.In figure
For the focus point of different color light all near Airy, image quality is preferable, no obvious color difference performance.
A kind of ultra-wide angle underwater low-light-level imaging camera lens provided by the utility model is installed on underwater robot, for underwater
Detection uses.
In conclusion a kind of ultra-wide angle underwater low-light-level imaging camera lens provided by the utility model, by selecting suitable glasses
Combination of materials, reasonable distribution optical system focal power adjust the deflection of light of each lens surface, balance various pieces optics
Aberration improves the performance parameter of optical system.In optical design by the way that different weights are arranged to different-waveband, in lens materials
Have well when the high material of upper selection wide spectrum transmitance is to guarantee that optical system uses under water to the spectrum of each wave band
Transmitance.By making optical system have the characteristics that large aperture the reasonable correction that optical aberration carries out, with starlight grade
Photosensitive element is used cooperatively underwater realization blur-free imaging that can be low in illuminance.Since the influence camera lens of aqueous medium is underwater
Field angle can significantly reduce, so full filed angle is designed as 180 °, ensure that camera lens by increasing field angle in design
Can also have the characteristics that big wide-angle under water.And so that optical system is had the characteristics that the big depth of field by depth of field optimisation technique, protect
Having demonstrate,proved has good imaging effect to underwater different far and near objects.
The above description is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all
Equivalents made based on the specification and figures of the utility model are applied directly or indirectly in relevant technology neck
Domain is also included in the patent protection scope of the utility model.
Claims (6)
1. a kind of ultra-wide angle underwater low-light-level imaging camera lens, which is characterized in that including mirror head outer shell, from object space in the mirror head outer shell
Include: to the optical glass that image space is arranged successively
First lens, the meniscus shaped lens with negative power；
Second lens, the double concave type lens with negative power；
The third lens, the lenticular lens with positive light coke；
4th lens, the lenticular lens with positive light coke；
5th lens, the meniscus shaped lens with negative power；
6th lens, the lenticular lens with positive light coke；
7th lens, the lenticular lens with positive light coke；
8th lens, the lenticular lens with positive light coke；
9th lens, the double concave type lens with negative power；
Wherein, the 5th lens are connect with the 6th lens gluing, and the 8th lens are connect with the 9th lens gluing；Except described
It is outer between 5th lens and the 6th lens and between the 8th lens and the 9th lens, between remaining two neighboring lens with
Air is medium.
2. ultra-wide angle underwater low-light-level imaging camera lens according to claim 1, which is characterized in that first lens, second
Lens, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens and the 9th lens are coaxially set
It sets.
3. ultra-wide angle underwater low-light-level imaging camera lens according to claim 1, which is characterized in that the refraction of first lens
Rate is 1.72 < Nd1 < 1.83, and Abbe number is 42.7 < Vd1 < 54.8, and the one side of first lens towards object plane is convex lens,
The one side of first lens and the second lens light connects is concave lens；
The refractive index of second lens be 1.67 < Nd2 < 1.71, Abbe number be 53.3 < Vd2 < 56.2, second lens with
The one side of first lens light connects is concave lens, and the one side of second lens and the third lens light connects is concave lens；
The refractive index of the third lens be 1.62 < Nd3 < 1.71, Abbe number be 41.1 < Vd3 < 53.2, the third lens with
The one side of second lens light connects is convex lens, and the one side of the third lens and the 4th lens light connects is convex lens；
The third lens are thick lens；
The refractive index of 4th lens be 1.85 < Nd4 < 1.92, Abbe number be 32.3 < Vd4 < 37.1, the 4th lens with
The one side of the third lens light connects is convex lens, and the one side of the 4th lens and the 5th lens light connects is convex lens；
4th lens are thick lens；
The refractive index of 5th lens be 1.64 < Nd5 < 1.76, Abbe number be 25.2 < Vd5 < 33.8, the 5th lens with
The one side of 4th lens light connects is convex lens, and the one side of the 5th lens and the 6th lens light connects is concave lens；
The refractive index of 6th lens be 1.48 < Nd6 < 1.65, Abbe number be 60.2 < Vd6 < 81.7, the 6th lens with
The one side of 5th lens light connects is convex lens, and the one side of the 6th lens and the 7th lens light connects is convex lens；
The refractive index of 7th lens is 1.8 < Nd7 < 1.90, and Abbe number is 37.2 < Vd7 < 46.7, the 7th lens and the
The one side of six lens light connects is convex lens, and the one side of the 7th lens and the 8th lens light connects is convex lens；
The refractive index of 8th lens be 1.62 < Nd8 < 1.67, Abbe number be 55.5 < Vd8 < 63.5, the 8th lens with
The one side of 7th lens light connects is convex lens, and the one side of the 8th lens and the 9th lens light connects is convex lens；
The refractive index of 9th lens be 1.78 < Nd9 < 1.87, Abbe number be 20.8 < Vd9 < 26.1, the 9th lens with
The one side of 8th lens light connects is concave lens, and the 9th lens are concave lens with the one side towards image planes.
4. ultra-wide angle underwater low-light-level imaging camera lens according to claim 3, which is characterized in that the refraction of first lens
Rate is 1.77, Abbe number 49.6；
The refractive index of second lens is 1.69, Abbe number 54.9；
The refractive index of the third lens is 1.67, Abbe number 48.4；
The refractive index of 4th lens is 1.91, Abbe number 35.3；
The refractive index of 5th lens is 1.73, Abbe number 28.3；
The refractive index of 6th lens is 1.59, Abbe number 68.5；
The refractive index of 7th lens is 1.83, Abbe number 42.7；
The refractive index of 8th lens is 1.64, Abbe number 60.2；
The refractive index of 9th lens is 1.85, Abbe number 23.8.
5. ultra-wide angle underwater low-light-level imaging camera lens according to claim 3, which is characterized in that the 5th lens are flint
Glass, the 6th lens are ED glass.
6. ultra-wide angle underwater low-light-level imaging camera lens according to claim 1, which is characterized in that along optical path incident direction, often
Airspace between two adjacent lens is successively are as follows: the first lens and the second lens centre airspace are 5.47mm；The
1.05mm is divided between two lens and the third lens center air；The third lens and the 4th lens centre airspace are 0.2mm；The
Four lens and the 5th lens centre airspace are 0.13mm；6th lens and the 7th lens centre airspace are 4.29mm；
7th lens and the 8th lens centre airspace are 0.12mm.
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| CN201821051761.XU CN208351112U (en) | 2018-07-04 | 2018-07-04 | A kind of ultra-wide angle underwater low-light-level imaging camera lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113176652A (en) * | 2021-04-26 | 2021-07-27 | 嘉兴中润光学科技股份有限公司 | Large-aperture vehicle-mounted lens and image pickup device |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113176652A (en) * | 2021-04-26 | 2021-07-27 | 嘉兴中润光学科技股份有限公司 | Large-aperture vehicle-mounted lens and image pickup device |
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Effective date of registration: 20240117 Address after: No. 23 Jixing East Lane, Cangshan District, Fuzhou City, Fujian Province, 350000 Patentee after: Chart Intelligent Technology Co.,Ltd. Address before: 350000 203, floor 2, building 10, No. 7, Jinzhou North Road, Jinshan Industrial Zone, Jianxin Town, Fuzhou, Fujian Patentee before: FUJIAN HAITU INTELLIGENT CO.,LTD. |