CN206193326U - Photographic optical imaging system of special use under water - Google Patents
Photographic optical imaging system of special use under water Download PDFInfo
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- CN206193326U CN206193326U CN201621298061.1U CN201621298061U CN206193326U CN 206193326 U CN206193326 U CN 206193326U CN 201621298061 U CN201621298061 U CN 201621298061U CN 206193326 U CN206193326 U CN 206193326U
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Abstract
The utility model discloses a photographic optical imaging system of special use under water, accessory things incline for instance the side is equipped with in proper order: first lens, second lens, third lens, fourth lens, diaphragm, the 5th lens, VI lenses, the 7th lens, the 8th lens, first lens and VI lenses's focal power is the negative value, the focal power of fourth lens, the 5th lens and the 8th lens is the positive value, photographic optical imaging system of special use under water satisfies following expression formula: 0.05< | f1f2|< 0.5, 4< | f3f4|< 5.5, 1< | f5f6|< 2.5, 0.02< | f7f8|< 1, wherein f1, f2, f3, f4, f5, f6, f7 and f8 are the focuses of first lens, second lens, third lens, fourth lens, the 5th lens, VI lenses, the 7th lens and the 8th lens. The utility model aims to provide a pair of small, light in weight, the visual field is big, the depth of field is big, high like matter, high -resolution photographic optical imaging system of special use under water.
Description
【Technical field】
The utility model is related to a kind of special-purpose photography optical imaging system under water, it is adaptable to optical imaging field.
【Background technology】
Because the influence of photographic field lens object space aqueous medium causes the optical system used on ground by simple waterproof sealing
Many problems can be run into for Underwater Imaging afterwards, such as matter deterioration, visual field loss etc..And, common underwater photography mirror
Head substantially adds bucker to constitute using land phtographic lens.The drawbacks of this kind of camera lens is the angle of visual field smaller than the angle of visual field in land,
And image quality is poor, fuzzy pictures.And it is current, the underwater photography camera lens announced both at home and abroad does not have big visual field, big relative opening
The advantage in footpath, full filed angle is less than 86 ° under water, and structure is more complicated, in addition to it cannot make full use of luminous energy under water, also limit into
As the size of scope.
The utility model is to research and propose in view of the shortcomings of the prior art.
【Utility model content】
The utility model purpose is to overcome the deficiencies in the prior art, there is provided a kind of small volume, lightweight, visual field are big, scape
Deep big, height is as matter, high-resolution special-purpose photography optical imaging system under water.
The utility model is achieved through the following technical solutions：
A kind of special-purpose photography optical imaging system under water, is sequentially provided with from the object side to image side：First lens, the second lens,
3rd lens, the 4th lens, diaphragm, the 5th lens, the 6th lens, the 7th lens, the 8th lens；
First lens and the 6th power of lens are negative value, the 4th lens, the 5th lens and the 8th lens
Focal power be on the occasion of；
The optical imaging system of special-purpose photography under water meets following expression：
0.05<|f1/f2|<0.5,4<|f3/f4|<5.5,1<|f5/f6|<2.5,0.02<|f7/f8|<1；
Wherein f1, f2, f3, f4, f5, f6, f7 and f8 are the first lens, the second lens, the 3rd lens, the 4th lens,
The focal length of five lens, the 6th lens, the 7th lens and the 8th lens.
Special-purpose photography optical imaging system under water as described above, it is characterised in that second lens, the 4th lens, the
Front and rear two minute surface of seven lens and the 8th lens is at least simultaneously aspherical.
Special-purpose photography optical imaging system under water as described above, it is characterised in that the 5th lens and the 6th lens glue
It is combined to form lens group.
Special-purpose photography optical imaging system under water as described above, it is characterised in that the special-purpose photography optical imagery under water
System meets following expression：
(vd2, vd5, vd7, vd8) ＞ 40；
0<(vd1, vd3, vd4, vd6) ＜ 45；
Wherein vd1、vd2、vd3、vd4、vd5、vd6、vd7And vd8It is the first lens, the second lens, the 3rd lens, the 4th saturating
The abbe number of mirror, the 5th lens, the 6th lens, the 7th lens and the 8th lens.
Special-purpose photography optical imaging system under water as described above, it is characterised in that the special-purpose photography optical imagery under water
System meets following expression：
30<vd1<45,45<vd2<60,20<vd3<40,30<vd4<45,45<vd5<65,
20<vd6<30,40<vd7<50 and 65<vd8<80。
Special-purpose photography optical imaging system under water as described above, it is characterised in that the 5th lens and the 6th lens
Abbe number meets：15<vd5-vd6<45。
Special-purpose photography optical imaging system under water as described above, it is characterised in that the special-purpose photography optical imagery under water
System meets following expression：
1.7<nd1<2.2,1.4<nd2<2,1.6<nd3<2,1.6<nd4<2,1.55<nd5<1.85,
1.7<nd6<2,1.7<nd7<1.9 and 1.45<nd8<1.7；
Wherein nd1、nd2、nd3、nd4、nd5、nd6、nd7And nd8It is the first lens, the second lens, the 3rd lens, the 4th saturating
The material refractive index of mirror, the 5th lens, the 6th lens, the 7th lens and the 8th lens.
Special-purpose photography optical imaging system under water as described above, it is characterised in that the special-purpose photography optical imagery under water
System meets following expression：
The ＜ BFL/TL ＜ 0.25 of 0.1 ＜ EFL/TL ＜ 0.25,0.1；
The ＜ (T1+T2) of 0.01 ＜ T2/TL ＜, 0.06,0.01 ＜ T3/TL ＜ 0.24,0.5/T5 ＜ 1.5；
T3/T2>The ＜ T7/T8 ＜ 0.5 of 0.15,0.3 ＜ T4/T3 ＜, 1,1.2 ＜ T5/T6 ＜ 2.5,0.4；
The ＜ A4/A6 ＜ 1.5 of 2 ＜ A1/A7 ＜ 4,0.5；
Wherein EFL is the effective focal length of the optical imaging system of special-purpose photography under water, and BFL is the special-purpose photography under water
Rear Jiao of optical imaging system, TL is distance of first lens 1 to image planes, and T1 to T8 is the first lens, the second lens, the 3rd saturating
The lens center thickness of mirror, the 4th lens, the 5th lens, the 6th lens, the 7th lens and the 8th lens, A1 be the first lens with
The spacing of the second lens, A4 is the spacing of the 4th lens and the 5th lens, and A6 is the spacing of the 6th lens and the 7th lens, and A7 is
The spacing of the 7th lens and the 8th lens.
Compared with prior art, the utility model has the following advantages：
1. the optical imaging system compact conformation of special-purpose photography under water described in the utility model, is avoided using aspheric design
Spherical aberration that whole spheric glasses are produced and distortion etc., realize big visual field, the big depth of field, height as matter, high-resolution, macropore
Footpath is imaged, it is adaptable to shooting of the underwater camera to the object such as portrait, seabed landscape and seabed phytoplankton and animal；
2. the structure and eyeglass arrangement mode of the optical imaging system of special-purpose photography under water described in the utility model can be effective
Microscope group volume is reduced, solves the problems, such as to be distorted when the big angle of visual field, picture high big, can effectively reduce high angle scattered light in imaging surface
Incident angle, and the susceptibility of optical system is reduced, obtain resolving power higher；
3. the optical imaging system of special-purpose photography under water imagewise uniform described in the utility model, brightness is high, the big (aperture in aperture
Number reaches F2.8), the efficiency of light energy utilization is high；
4. the optical imaging system of special-purpose photography under water described in the utility model causes the system using double agglutination lens group
Imaging color is clearly demarcated, and color is Well-recovered with image planes；
5. the non-spherical lens that the optical imaging system of special-purpose photography under water described in the utility model is used is conducive to aberration
Correction, reduce aberration and the distortion of system, the picture matter of whole visual field is improved, so that the resolution of the optical imaging system
Rate, transmitance, color reducibility are significantly improved；
6. the optical imaging system of special-purpose photography under water described in the utility model can realize the effective control to off-axis aberration,
Solve and be difficult to the problem of high-resolution and low distortion under big visual field, picture high, while having miniaturization and lightness
Structure and profile, and full filed can realize the image height more than φ 16mm in the case where overall length is less than 37mm；
7. the optical imaging system of special-purpose photography under water described in the utility model can be reached higher than 20M (20,000,000 pixel)
Resolution ratio, it is ensured that high-resolution be imaged；
8. the optical lens diagonal angles of visual field degree of the optical imaging system of special-purpose photography under water described in the utility model is big
In 90 °, its temperature drift scope in -40 DEG C~80 DEG C, stable performance and substantially without focusing again；
9. the TV of the optical imaging system of special-purpose photography under water described in the utility model distorts and 9% is less than under full filed,
Aberration control meets requirement of the underwater photography camera to distorting in smaller scope；
10. the optical imaging system of special-purpose photography under water described in the utility model can realize 0.2m to 20m different object distances
Shoot, coverage is larger, and imaging clearly, selectable leeway is big.
【Brief description of the drawings】
Fig. 1 is the schematic diagram of the optical imaging system of special-purpose photography under water described in the utility model
【Specific embodiment】
Implementation method of the present utility model is elaborated below in conjunction with the accompanying drawings：
It is a kind of special under water to take the photograph as shown in figure 1, a kind of special-purpose photography optical imaging system under water that the utility model is related to
Shadow optical imaging system, it is characterised in that：It is sequentially provided with from the object side to image side：First lens 1, the second lens 2, the 3rd lens 3,
4th lens 4, diaphragm 9, the 5th lens 5, the 6th lens 6, the 7th lens 7, the 8th lens 8；
First lens 1 and the focal power of the 6th lens 6 are negative value, and the 4th lens 4, the 5th lens 5 and the 8th are saturating
The focal power of mirror 8 be on the occasion of；
The optical imaging system of special-purpose photography under water meets following expression：
0.05<|f1/f2|<0.5,4<|f3/f4|<5.5,1<|f5/f6|<2.5,0.02<|f7/f8|<1；
Wherein f1, f2, f3, f4, f5, f6, f7 and f8 are the first lens 1, the second lens 2, the 3rd lens 3, the 4th lens
4th, the focal length of the 5th lens 5, the 6th lens 6, the 7th lens 7 and the 8th lens 8.5th lens 5 and the 6th lens 6 are glued
Lens group is formed together so that the system imaging color is clearly demarcated, and color is Well-recovered with image planes.
Front and rear two minute surface of second lens 2, the 4th lens 4, the 7th lens 7 and the 8th lens 8 is at least simultaneously
It is aspherical.
Described special-purpose photography optical imaging system under water, it is characterised in that the special-purpose photography optical imaging system under water
Meet following expression：
(vd2, vd5, vd7, vd8) ＞ 40；
0<(vd1, vd3, vd4, vd6) ＜ 45；
Wherein vd1、vd2、vd3、vd4、vd5、vd6、vd7And vd8It is the first lens 1, the second lens 2, the 3rd lens the 3, the 4th
The abbe number of lens 4, the 5th lens 5, the 6th lens 6, the 7th lens 7 and the 8th lens 8.
In addition, the material refractive index nd of first lens 11Meet：1.7<nd1<2.2, abbe number is vd1, meet：
30<vd1<45；For controlling thing side angle of incidence of light and reducing image deformation.
Minute surface at least one side is that oval hyperbola is aspherical before and after second lens 2, its material refractive index nd2It is full
Foot：1.4<nd2<2, abbe number is vd2, meet：45<vd2<60；So can well reduce distortion and increasing light is in image planes
On height of incidence, improve peripheral field illumination, improve system optical transfer function, so as to be lifted as matter.
The material refractive index nd of 3rd lens 33Meet：1.6<nd3<2, abbe number is vd3, meet：20<vd3<40；
Change in refraction angle of the light between each lens can so be controlled.
Minute surface at least one side is oblate aspherical before and after 4th lens 4, and its material uses refractive index nd4It is full
Foot：1.6<nd4<2, abbe number is vd4, meet：30<vd4<45；So can well reduce distortion and increasing light is in image planes
On height of incidence, improve peripheral field illumination, improve system optical transfer function, so as to be lifted as matter.
5th lens 5 and the 6th lens 6 are double glued constructions, the refractive index nd of the 5th lens 55Meet：
1.55<nd5<1.85, abbe number is vd5, meet：45<vd5<65；The refractive index nd of the 6th lens 66Meet：1.7<nd6
<2, abbe number is vd6, meet：20<vd6<30；The abbe number of the 5th lens 5 and the 6th lens 6 also meets：15<vd5-
vd6<45；Axial chromatic aberration can so be compensated.
Minute surface at least one side is that hyperbola is aspherical before and after 7th lens 7, its material refractive index nd7Meet：1.7
<nd7<1.9, abbe number vd7Meet：40<vd7<50；So can well reduce distortion and increasing light entering in image planes
Height is penetrated, the illumination of peripheral field is improved, the optical transfer function of system is improved, so as to be lifted as matter.
Minute surface at least one side is that hyperbola is aspherical before and after 8th lens 8, its material refractive index nd8Meet：
1.45<nd8<1.7, abbe number vd8Meet：65<vd8<80；Image planes chief ray incidence angles can so be reduced, reduce imaging picture
Difference.
Diaphragm 9 is provided between 4th lens 4 and the 5th lens 5, directly can be controlled using the perforate size of aperture
Light-inletting quantity so that the overall uniform, brightness of imaging picture is high.
The aspherical surface shape meets following expression：
In formula, parameter c is the curvature corresponding to radius, and its unit is identical with length of lens unit for radial coordinate for y,
K is circular cone whose conic coefficient；Work as k<When -1, the face shape curve of lens is hyperbola, as k=-1, the face shape curve of lens
It is parabola；When -1<k<When 0, the face shape curve of lens is ellipse, and as k=0, the face shape curve of lens is circle, works as k>0
When, the face shape curve of lens is oblateness；α1To α8The coefficient corresponding to each radial coordinate is represented respectively, is so conducive to aberration
Correction, reduce aberration and the distortion of system, the picture matter of whole visual field is improved, so that the resolution of the optical imaging system
Rate, transmitance, color reducibility are significantly improved.
The optical imaging system of special-purpose photography under water meets following expression：
The ＜ BFL/TL ＜ 0.25 of 0.1 ＜ EFL/TL ＜ 0.25,0.1；
The ＜ (T1+T2) of 0.01 ＜ T2/TL ＜, 0.06,0.01 ＜ T3/TL ＜ 0.24,0.5/T5 ＜ 1.5；
T3/T2>The ＜ T7/T8 ＜ 0.5 of 0.15,0.3 ＜ T4/T3 ＜, 1,1.2 ＜ T5/T6 ＜ 2.5,0.4；
The ＜ A4/A6 ＜ 1.5 of 2 ＜ A1/A7 ＜ 4,0.5；
Wherein EFL is the effective focal length of the optical imaging system of special-purpose photography under water, and BFL is the special-purpose photography under water
Rear Jiao of optical imaging system, TL is distance of first lens 1 to image planes, and T1 to T8 is the first lens 1, the second lens the 2, the 3rd
The lens center thickness of lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6, the 7th lens 7 and the 8th lens 8, A1 is
The spacing of one lens 1 and the second lens 2, A4 is the spacing of the 4th lens 4 and the 5th lens 5, and A6 is that the 6th lens 6 are saturating with the 7th
The spacing of mirror 7, A7 is the spacing of the 7th lens 7 and the 8th lens 8.
The optical imaging system of special-purpose photography under water described in the utility model uses sphere and aspherical combination so that system
Compact conformation, it is to avoid spherical aberration that whole spheric glasses are produced and distortion etc., realize big visual field, the big depth of field, it is high as matter,
High-resolution, large aperture imaging, it is adaptable to which underwater camera is to the object such as portrait, seabed landscape and seabed phytoplankton and animal
Shoot；And the eyeglass arrangement mode can effectively reduce microscope group volume, big, the energy that distorted when the big angle of visual field, picture high is solved the problems, such as
Effective incident angle for reducing high angle scattered light in imaging surface, and the susceptibility of optical system is reduced, obtain resolving power higher；
Imagewise uniform, brightness are high, aperture is big (F-number reaches F2.8), and the efficiency of light energy utilization is high；Can also realize to the effective of off-axis aberration
Control, to solve and be difficult to the problem of high-resolution and low distortion under big visual field, picture high, while having miniaturization and light-duty
The structure and profile of change, and full filed can realize the image height more than φ 16mm in the case where overall length is less than 37mm；
Optical imaging system described in the utility model can reach higher than 20M's (20,000,000 pixel) when actually used
Resolution ratio, it is ensured that high-resolution is imaged；Optical lens diagonal angles of visual field degree is more than 90 °, and its temperature drift scope is -40 DEG C~80
In DEG C, stable performance and substantially without focusing again；TV distorts and 9% is less than under full filed, and aberration control is in smaller model
In enclosing, requirement of the underwater photography camera to distorting is met；Can also realize the shooting of 0.2m to 20m different object distances, coverage compared with
Greatly, imaging clearly, selectable leeway is big.
Claims (8)
1. one kind special-purpose photography optical imaging system under water, it is characterised in that：It is sequentially provided with from the object side to image side：First lens
(1), the second lens (2), the 3rd lens (3), the 4th lens (4), diaphragm (9), the 5th lens (5), the 6th lens (6), the 7th
Lens (7), the 8th lens (8)；
The focal power of first lens (1) and the 6th lens (6) be negative value, the 4th lens (4), the 5th lens (5) and
The focal power of the 8th lens (8) be on the occasion of；
The optical imaging system of special-purpose photography under water meets following expression：
0.05<|f1/f2|<0.5,4<|f3/f4|<5.5,1<|f5/f6|<2.5,0.02<|f7/f8|<1；
Wherein f1, f2, f3, f4, f5, f6, f7 and f8 are the first lens (1), the second lens (2), the 3rd lens (3), the 4th saturating
The focal length of mirror (4), the 5th lens (5), the 6th lens (6), the 7th lens (7) and the 8th lens (8).
2. special-purpose photography optical imaging system under water according to claim 1, it is characterised in that second lens (2),
Front and rear two minute surface of the 4th lens (4), the 7th lens (7) and the 8th lens (8) is at least simultaneously aspherical.
3. special-purpose photography optical imaging system under water according to claim 1, it is characterised in that the 5th lens (5) and
6th lens (6) formation lens group glued together.
4. special-purpose photography optical imaging system under water according to claim 1, it is characterised in that the special-purpose photography under water
Optical imaging system meets following expression：
(vd2, vd5, vd7, vd8) ＞ 40；
0<(vd1, vd3, vd4, vd6) ＜ 45；
Wherein vd1、vd2、vd3、vd4、vd5、vd6、vd7And vd8It is the first lens (1), the second lens (2), the 3rd lens (3),
The abbe number of four lens (4), the 5th lens (5), the 6th lens (6), the 7th lens (7) and the 8th lens (8).
5. special-purpose photography optical imaging system under water according to claim 3, it is characterised in that the special-purpose photography under water
Optical imaging system meets following expression：
30<vd1<45,45<vd2<60,20<vd3<40,30<vd4<45,45<vd5<65,20<vd6<30,40<vd7<50 and 65<
vd8<80。
6. special-purpose photography optical imaging system under water according to claim 4, it is characterised in that the 5th lens (5) and
The abbe number of the 6th lens (6) meets：15<vd5-vd6<45。
7. the special-purpose photography optical imaging system under water according to claim 5 or 6, it is characterised in that described special under water to take the photograph
Shadow optical imaging system meets following expression：
1.7<nd1<2.2,1.4<nd2<2,1.6<nd3<2,1.6<nd4<2,1.55<nd5<1.85,1.7<nd6<2,1.7<nd7<
1.9 and 1.45<nd8<1.7；
Wherein nd1、nd2、nd3、nd4、nd5、nd6、nd7And nd8It is the first lens (1), the second lens (2), the 3rd lens (3),
The material refractive index of four lens (4), the 5th lens (5), the 6th lens (6), the 7th lens (7) and the 8th lens (8).
8. special-purpose photography optical imaging system under water according to claim 1, it is characterised in that the special-purpose photography under water
Optical imaging system meets following expression：
The ＜ BFL/TL ＜ 0.25 of 0.1 ＜ EFL/TL ＜ 0.25,0.1；
The ＜ (T1+T2) of 0.01 ＜ T2/TL ＜, 0.06,0.01 ＜ T3/TL ＜ 0.24,0.5/T5 ＜ 1.5；
T3/T2>The ＜ T7/T8 ＜ 0.5 of 0.15,0.3 ＜ T4/T3 ＜, 1,1.2 ＜ T5/T6 ＜ 2.5,0.4；
The ＜ A4/A6 ＜ 1.5 of 2 ＜ A1/A7 ＜ 4,0.5；
Wherein EFL is the effective focal length of the optical imaging system of special-purpose photography under water, and BFL is the special-purpose photography optics under water
Rear Jiao of imaging system, TL is distance of the first lens (1) to image planes, and T1 to T8 is the first lens (1), the second lens (2),
The eyeglass of three lens (3), the 4th lens (4), the 5th lens (5), the 6th lens (6), the 7th lens (7) and the 8th lens (8)
Center thickness, A1 is the spacing of the first lens (1) and the second lens (2), between the lens (4) of A4 the 4th and the 5th lens (5)
Away from A6 is the spacing of the 6th lens (6) and the 7th lens (7), and A7 is the spacing of the 7th lens (7) and the 8th lens (8).
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| CN201621298061.1U CN206193326U (en) | 2016-11-29 | 2016-11-29 | Photographic optical imaging system of special use under water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106383400A (en) * | 2016-11-29 | 2017-02-08 | 中山联合光电科技股份有限公司 | Underwater special photography optical imaging system |
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2016
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106383400A (en) * | 2016-11-29 | 2017-02-08 | 中山联合光电科技股份有限公司 | Underwater special photography optical imaging system |
| CN106383400B (en) * | 2016-11-29 | 2019-01-18 | 中山联合光电科技股份有限公司 | A kind of underwater special-purpose photography optical imaging system |
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