CN207037196U - High definition underwater video pick-up lens - Google Patents
High definition underwater video pick-up lens Download PDFInfo
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- CN207037196U CN207037196U CN201720613123.1U CN201720613123U CN207037196U CN 207037196 U CN207037196 U CN 207037196U CN 201720613123 U CN201720613123 U CN 201720613123U CN 207037196 U CN207037196 U CN 207037196U
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- eyeglass
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Abstract
It the utility model is related to a kind of high definition underwater video pick-up lens; including the first eyeglass, the second eyeglass, light bar, the 3rd eyeglass, the 4th eyeglass, the 5th eyeglass and the 6th eyeglass set gradually along light incident direction; first eyeglass is convex-concave negative lens; second eyeglass is convex-concave positive lens; 3rd eyeglass is double-concave negative lens; 4th eyeglass is concavo-convex positive lens, and the 5th eyeglass is convex-concave positive lens, and the 6th eyeglass is flat board protective glass.The camera lens is using the method for making the entrance pupil position of whole optical system and the centre of sphere in first the first face of eyeglass coincides, ensure that light beam enters hydrospace without deviation, not only adapt to different water depth, can reach the effect of high definition in different water depth, and optical texture is simple, cost-effective.
Description
Technical field
Field of optical lens is the utility model is related to, more particularly to a kind of high definition underwater video pick-up lens.
Background technology
With the technological break-through that underwater video is photographed, particularly high sensitivity, high definition pick-up device and adapt to underwater
The breakthrough of the illuminator of the high brightness of photography so that the mankind by video camera apparatus can see it is apparent, apart from farther, water
The underwater scenery active situation that bottom is deeper, observing time is longer, the mankind have been promoted to explore the underwater field such as ocean, rivers and lakes
Bigger interest.Underwater industry newly, underwater security protection, underwater scientific research, Underwater resources exploration and development, underwater amusement etc. are rapid
Rise.
Different from land atmospheric environment, its object space propagation medium is the water that refractive index is 1.334 and 1.34316
Or seawater, therefore land usable video camera optical system, not necessarily it can use under water.It is placed in underwater camera optical system
System, the scenery seen is bigger by nearly 4/3 than what is seen in an atmosphere, it can be seen that subject distance be only in air 3/4.Due to water
Absorption and scattering to visible ray is stronger, and brightness decays rapidly (every meter of decay about 4%), can under conditions of sunny
Depending on horizontal range about 30m or so, while it is difficult the scenery for seeing depth of water 20m clearly.In more serious underwater of suspension, can see clearly
Scenery is often less than 2m.Therefore, underwater photography needs special human assistance illumination, can just look far, see deep.Study table
Bright, because absorption of the water to light makes the underwater color of scenery that very big change also occur, in depth of water 5m, feux rouges disappears,
Gold-tinted disappears during 10m, the only remaining blue streak after 20m, so the spectral centroid of underwater photography is near blue green light.In a word, in water
Under contrast (contrast), color, the third dimension of scenery be much worse than in air ambient.As preferable absorber, temperature is to taking the photograph
As systematic influence is larger, it is also desirable to award consideration.In addition, being placed in underwater object still suffers from the pressure bigger than on air,
Experiment shows every sinking 1m, and the pressure being subject on object increases by 1 atmospheric pressure.Therefore, the optical system of design and shell be not only
The problem of considering watertight, it is also contemplated that resistance to compression problem.
The conventional organization plan of underwater video pick-up lens substantially has two kinds at present：(1), as shown in figure 1, using concentric
Spherical shell lens are as preposition protection window.Wherein, sequence number a is seawater, and sequence number b is concentric spherical shell protective window mouth, and sequence number c is rearmounted
Object lens, sequence number d are entrance pupil, and sequence number e is image planes, d1For concentric shell thickness, d2For concentric spherical shell to rearmounted object lens spacing, R1For
Concentric spherical shell outer radius, R2For concentric spherical shell inside radius, lpAfterwardsFor rearmounted object lens front end to the spacing at entrance pupil center, R2=d2+
lpAfterwards.It allows the exit pupil position of rearmounted optical system to be in the centre of sphere of concentric spherical shell.On the one hand light can be allowed radially to project,
Ensure that the light beam through spherical shell outgoing enters hydrospace without deviation；On the other hand certain+S3 and-S4 (primary image fields can be produced
Coefficient), the counterbalance space medium curvature of field larger as caused by air is changed to water and astigmatism.The shortcomings that this structure is concentric
Ball hardly possible is processed and processing efficiency is low.(2), as shown in Fig. 2 using adding one group before designed rearmounted camera lens in atmosphere
Inverted Galilean telescope.Wherein, sequence number f is seawater, and for sequence number g to be inverted galilean telescope system, sequence number h is rear glove
Mirror, sequence number i are entrance pupil, and sequence number j is image planes.The field expander of designed rearmounted camera lens in atmosphere to and be placed on aqueous medium
Equally.Object space medium aberration as caused by air is changed to water so can be corrected with the parameter of preposition telescope.It is this
The deficiency of structure is the increase of piece number.
In addition, at present most of underwater video pick-up lens be wide-angle (some accomplishes ultra-wide angle), especially big picture pick-up device, compared with
The camera lens of large aperture, such as United States Patent (USP)：5579169, its f '=12.3mm, 2 ω are at 170 ° -180 °, D/f=1；2.3, nine knots
Structure, optics overall length are more than 130mm；Also there are the development that unit carries out this respect camera lens, substantially medium visual field, medium hole in China
Footpath, eyeglass number is all more than seven, and optical system length is not less than 80mm, and the definition of above-mentioned camera lens is SD.
Utility model content
The purpose of this utility model is to overcome disadvantage mentioned above, there is provided a kind of high definition underwater video pick-up lens, the camera lens
The method to be coincided using the centre of sphere of the entrance pupil position for making whole optical system and first the first face of eyeglass, ensure light beam without deviation
Ground enters hydrospace, not only adapts to different water depth, can reach the effect of high definition in different water depth, and optical texture letter
It is single, cost-effective.
What the utility model was realized in：A kind of high definition underwater video pick-up lens, it is characterised in that：Including along light
The first eyeglass, the second eyeglass, light bar, the 3rd eyeglass, the 4th eyeglass, the 5th eyeglass and the 6th mirror that incident direction is set gradually
Piece, first eyeglass are convex-concave negative lens, and second eyeglass is convex-concave positive lens, and the 3rd eyeglass is that concave-concave is negative saturating
Mirror, the 4th eyeglass are concavo-convex positive lens, and the 5th eyeglass is convex-concave positive lens, and the 6th eyeglass is that flat board protects glass
Glass, following condition need to be met by forming each optical element of pick-up lens：
lp1=R1±0.2mm‥‥‥①
3<R1/R2<4.5‥‥‥②
-0.075<h1/f′Before<-0.05‥‥‥③
7.8<R10<9.5‥‥‥④
17.5<d2<18.5‥‥‥⑤
4<d1<6‥‥‥⑥
1.71<n3<1.75 50<v3<58‥‥‥⑦
1.75<n8<1.78 50<v8<57‥‥‥⑧
1.71<n6<1.76 26.5<v6<30‥‥‥⑨
Wherein, lp1For first the first face of eyeglass to the distance at optical system entrance pupil center, R1、R2、R10Respectively along light
The radius in the face of incident direction eyeglass first, the second face and the tenth face, h1For entrance pupil semiaperture, f 'BeforeFor the focal length of the first eyeglass, d1
For the thickness of the first eyeglass, d2For the airspace between the first eyeglass and the second eyeglass, n3、n6、n8Respectively the second eyeglass,
The refractive index of 3rd eyeglass and the 4th eyeglass, v3、v6、v8The respectively Abbe system of the second eyeglass, the 3rd eyeglass and the 4th eyeglass
Number.
In order to realize the miniaturization of camera lens, following condition need to be met by forming each optical element of pick-up lens：
0.8<︱ f '3︱/f '<1.2‥‥‥⑩
Wherein, f '3For the focal length of the 3rd eyeglass, f '5For the focal length of the 5th eyeglass, f ' is the focal length of whole optical system.
In order to avoid pick-up lens is corroded, the high definition underwater video pick-up lens also includes being arranged at the first eyeglass
The preposition plate glass of front end, pure water is full of between first eyeglass and preposition plate glass.
Preferably, the light bar is electric remote control iris.
Preferably, first eyeglass, the second eyeglass, the 3rd eyeglass, the 4th eyeglass, the 5th eyeglass and the 6th eyeglass point
Not Cai Yong following material be made：H-K9L、H-LaK52、H-ZF4、H-LaK53A、H-LaK53A、H-K9L.
For prior art, the utility model has advantages below：
(1) high definition underwater video pick-up lens provided by the utility model, using the entrance pupil position for making whole optical system
The method to be coincided with the centre of sphere in first the first face of eyeglass, ensure that light beam enters hydrospace without deviation, not only adapt to difference
The depth of water, the effect that can reach in different water depth high definition, and optical texture is simple, cost-effective；
(2) high definition underwater video pick-up lens provided by the utility model, the radius and thickness in first the second face of eyeglass can
Aberration is corrected together as parameter and rearmounted optical system, the image quality of favourable optical system further improves；
(3) high definition underwater video pick-up lens provided by the utility model, preposition flat board protection glass is provided with before the first eyeglass
Glass is simultaneously filled with pure water at it between the first eyeglass, makes the former face of camera lens first is not direct to be contacted with seawater or filthy water, can not only
Increase the service life, and it separately can individually be sealed with former camera lens below, need to only change preposition flat board protection during maintenance
Glass；
(4) high definition underwater video pick-up lens provided by the utility model, camera lens overall length are not more than 50mm, have structure letter
The advantages that single, miniaturization, easy to maintenance, wide-angle large aperture.
Brief description of the drawings
The utility model is described in further detail in conjunction with the embodiments with reference to the accompanying drawings：
Fig. 1 is the principle schematic that prior art uses homocentric sphere shell side case；
Fig. 2 is prior art using the principle schematic for adding inverted Galilean telescope scheme；
Fig. 3 is the structural representation of the utility model high definition underwater video pick-up lens embodiment 1；
Fig. 4 is the structural representation of the utility model high definition underwater video pick-up lens embodiment 2；
Fig. 5 is the main geometrical aberration curve map of the utility model lens assembly embodiment 1.Wherein：MTF curve figure is 0
ω, 0.5 ω, 0.7 ω, the MTF curve of each visual fields of 1 ω, the unit of abscissa be line it is right/mm；Spherical aberration, astigmatism abscissa list
Position is mm；The unit of the abscissa of ratio chromatism, is μm；The unit of characteristic maximum ordinate is ± 20 μm；Distortion
The unit of abscissa is %；
Fig. 6 is 0 ω in the utility model lens assembly embodiment 2,0.5 ω, 0.7 ω, the MTF curve of each visual fields of 1 ω.
The unit of the abscissa of MTF curve figure be line it is right/mm.
Symbol description in figure：1st, the first eyeglass, the 2, second eyeglass, the 3, the 3rd eyeglass, the 4, the 4th eyeglass, the 5, the 5th eyeglass,
6th, the 6th eyeglass, 7, light bar, 0, seawater, 1 ', preposition plate glass, 2 ' pure water.
Embodiment
The utility model content is described in detail with reference to Figure of description and specific embodiment：
As shown in figure 3, it is a kind of high definition underwater video pick-up lens provided by the utility model, it is characterised in that：Including
The first eyeglass 1, the second eyeglass 2, light bar 7, the 3rd eyeglass 3, the 4th eyeglass 4, the 5th mirror set gradually along light incident direction
The eyeglass 6 of piece 5 and the 6th, first eyeglass 1 are convex-concave negative lens, and second eyeglass 2 is convex-concave positive lens, the described 3rd
Eyeglass 3 is double-concave negative lens, and the 4th eyeglass 4 is concavo-convex positive lens, and the 5th eyeglass 5 is convex-concave positive lens, described
Six eyeglasses 6 are flat board protective glass, form each optical element of pick-up lens and need to meet following condition：
lp1=R1±0.2mm‥‥‥①
3<R1/R2<4.5‥‥‥②
-0.075<h1/f′Before<-0.05‥‥‥③
7.8<R10<9.5‥‥‥④
17.5<d2<18.5‥‥‥⑤
4<d1<6‥‥‥⑥
1.71<n3<1.75 50<v3<58‥‥‥⑦
1.75<n8<1.78 50<v8<57‥‥‥⑧
1.71<n6<1.76 26.5<v6<30‥‥‥⑨
Wherein, lp1For the face of the first eyeglass 1 first to the distance at optical system entrance pupil center, R1、R2、R10Respectively along light
The radius in the face of incident direction eyeglass first, the second face and the tenth face, h1For entrance pupil semiaperture, f 'BeforeFor the focal length of the first eyeglass 1, d1
For the thickness of the first eyeglass 1, d2For the airspace between the first eyeglass 1 and the second eyeglass 2, n3、n6、n8Respectively the second mirror
The refractive index of piece 2, the 3rd eyeglass 3 and the 4th eyeglass 4, v3、v6、v8Respectively the second eyeglass 2, the 3rd eyeglass 3 and the 4th eyeglass 4
Abbe number.
The purpose of setting condition 1. is to make underwater television camera lens protection window using non-concentric spherical shell structure, and make whole
The centre of sphere in the entrance pupil position of optical system and the face of the first eyeglass 1 first essentially coincides, and it is along footpath to reach the light beam through spherical shell outgoing
To injection, ensure that light beam enters hydrospace without deviation, the radius and thickness in the 2nd face of the piece can be used as parameter and rearmounted light
System is corrected to aberration together, and the image quality of favourable optical system further improves.According to calculating, award it ±
0.2mm tolerance is advantageous to be rapidly achieved the desired value of autobalance aberration, influences very little to the deviation angle for entering aqueous medium.
The purpose of setting condition 2. is, when the first eyeglass 1 is using decentraction spherical shell lens structure, two spheres to be allowed to produce
A certain amount of-S4 does not produce excessive+S3 differences again, be advantageous to balance object space be changed to the filed curvature brought after aqueous medium and
Astigmatism.
The purpose of setting condition 3. is not allow the first eyeglass 1 to undertake drift angle on excessive axle, avoids it from producing on advanced axle
Aberration, be advantageous to allow its balance object space to be changed to caused off-axis aberration after aqueous medium.
The purpose of setting condition 4. is to allow it to produce larger+S1, to balance ﹣ S1 caused by one side before the 3rd eyeglass 3,
Also it is balanced positive and negative high-order spherical aberration.
The purpose of setting condition 5. is that this interval plays a part of the entrance pupil for enabling optical system and R1 is overlapped.Calculate
Show, the longer the better for it, but is unfavorable for the miniaturization of system and widening for rear cut-off distance.
The purpose of setting condition 6. is on the premise of the first eyeglass 1 can bear outside hydraulic pressure, to control its thickness as far as possible
Degree, be advantageous to control the first face and entrance pupil position overlaps and the miniaturization of camera lens.
The purpose of setting condition 7. is to reduce the outer senior aberration of issuable axle, makes the lens after light bar only with primary
Aberration, the off-axis aberration of optical system can just be balanced.
The purpose of setting condition 8. is aberration and the half of its first face of increase on just advanced axle caused by reduction positive lens
Footpath, be advantageous to process.
The purpose of setting condition 9. is to reduce to bear aberration and the half of its first face of increase on advanced axle caused by negative lens
Footpath, be advantageous to process.
In order to realize the miniaturization of camera lens, following condition need to be met by forming each optical element of pick-up lens：
0.8<︱ f '3︱/f '<1.2‥‥‥⑩
Wherein, f '3For the focal length of the 3rd eyeglass, f '5For the focal length of the 5th eyeglass, f ' is the focal length of whole optical system.
The purpose of setting condition 10. is, by control its focal range be allowed to caused by negative high-order spherical aberration can be in certain model
In enclosing and a certain amount of-S1 ,-C1 are produced, positive high-order spherical aberration caused by positive lens below and-S1 ,-C1 is balanced therewith.
Setting conditionPurpose be while allowing a certain amount of-S1 ,-C1 caused by it, to be unlikely to optical system
Rear cut-off distance is too short.
As shown in figure 4, in order to avoid pick-up lens is corroded, the high definition underwater video pick-up lens also includes setting
Preposition plate glass 1 ' in the front end of the first eyeglass 1, pure water is full of between first eyeglass 1 and preposition plate glass 1 '.
Preferably, the light bar 7 is electric remote control iris.
Preferably, first eyeglass 1, the second eyeglass 2, the 3rd eyeglass 3, the 4th eyeglass 4, the 5th eyeglass 5 and the 6th
Eyeglass 6 is respectively adopted following material and is made：H-K9L、H-LaK52、H-ZF4、H-LaK53A、H-LaK53A、H-K9L.
Embodiment 1
Table 1 is the optical texture data of the utility model lens assembly shown in Fig. 3.R1、R2‥‥R12、R13It is each for lens
The radius in face；d1、d2‥‥d12、d13It is the thickness of each lens or the airspace between them respectively.Its real focal length f '=
5.765mm, relative aperture D/f '=1:2, ω=60 ° of the angle of visual field 2 (image planes size Φ 8mm), object distance L1 takes 25m, optics overall length
Totr=41.5mm, the spectral centroid of design are located at green glow (e light), the weight of each spectral line of e, F, d, c, g takes 1,1,0.8,0.3,
0.4.The unit of radius R and thickness d is mm.
Fig. 5 is the main geometrical aberration curve map of the utility model lens assembly embodiment 1.Wherein：MTF curve figure is 0
ω, 0.5 ω, 0.7 ω, the MTF curve of each visual fields of 1 ω, the unit of abscissa be line it is right/mm；Spherical aberration, astigmatism abscissa list
Position is mm；The unit of the abscissa of ratio chromatism, is μm；The unit of characteristic maximum ordinate is ± 20 μm；Distortion
The unit of abscissa is %.
Table 1：
Embodiment 2：
The difference of embodiment 2 and embodiment 1 is：As shown in figure 5, embodiment 2 adds on the basis of embodiment 1
Preposition plate glass 8, and pure water is full of between the first eyeglass 1 and preposition plate glass 8.
Table 2 is the optical texture data of embodiment 2.R1’、R2’、R1、R2‥‥R12、R13For the radius in each face of lens；d1’、
d2’、d1、d2‥‥d12、d13It is the thickness of each lens or the airspace between them respectively.Its real focal length f '=5.78mm,
Relative aperture D/f '=1:2, ω=60 ° of the angle of visual field 2 (image planes size Φ 8mm), object distance L1 takes 25m, optics overall length Totr=
The weight of each spectral line of 49.49mm, e, F, d, c, g takes 1,1,0.8,0.3,0.4.The unit of radius R and thickness d is mm.
Fig. 6 is 0 ω in the utility model lens assembly embodiment 2,0.5 ω, 0.7 ω, the MTF curve of each visual fields of 1 ω.
The unit of the abscissa of MTF curve figure be line it is right/mm.
Table 2：
Simply the technical solution of the utility model is explained in detail for above-mentioned embodiment, and the utility model is not
Above-described embodiment is only limited only to, every any improvement or replacement according to the utility model principle all should be new in this practicality
Within the protection domain of type.
Claims (4)
- A kind of 1. high definition underwater video pick-up lens, it is characterised in that：Including the first mirror set gradually along light incident direction Piece (1), the second eyeglass (2), light bar (7), the 3rd eyeglass (3), the 4th eyeglass (4), the 5th eyeglass (5) and the 6th eyeglass (6), First eyeglass (1) is convex-concave negative lens, and second eyeglass (2) is convex-concave positive lens, and the 3rd eyeglass (3) is concave-concave Negative lens, the 4th eyeglass (4) are concavo-convex positive lens, and the 5th eyeglass (5) is convex-concave positive lens, the 6th eyeglass (6) it is flat board protective glass, following condition need to be met by forming each optical element of pick-up lens：lp1=R1±0.2mm‥‥‥①3<R1/R2<4.5‥‥‥②-0.075<h1/f′Before<-0.05‥‥‥③7.8<R10<9.5‥‥‥④17.5<d2<18.5‥‥‥⑤4<d1<6‥‥‥⑥1.71<n3<1.75 50<v3<58‥‥‥⑦1.75<n8<1.78 50<v8<57‥‥‥⑧1.71<n6<1.76 26.5<v6<30‥‥‥⑨Wherein, lp1For the face of the first eyeglass (1) first to the distance at optical system entrance pupil center, R1、R2、R10Respectively enter along light Penetrate the radius in the face of direction eyeglass first, the second face and the tenth face, h1For entrance pupil semiaperture, f 'BeforeFor the focal length of the first eyeglass (1), d1 For the thickness of the first eyeglass (1), d2For the airspace between the first eyeglass (1) and the second eyeglass (2), n3、n6、n8Respectively The refractive index of second eyeglass (2), the 3rd eyeglass (3) and the 4th eyeglass (4), v3、v6、v8Respectively the second eyeglass (2), the 3rd mirror The Abbe number of piece (3) and the 4th eyeglass (4).
- 2. high definition underwater video pick-up lens according to claim 1, it is characterised in that：Form each optics of pick-up lens Element need to meet following condition：0.8<︱ f '3︱/f '<1.2‥‥‥⑩Wherein, f '3For the focal length of the 3rd eyeglass, f '5For the focal length of the 5th eyeglass, f ' is the focal length of whole optical system.
- 3. high definition underwater video pick-up lens according to claim 1, it is characterised in that：The high definition underwater video shooting Camera lens also includes the preposition plate glass (1 ') for being arranged at the first eyeglass (1) front end, first eyeglass (1) and preposition flat board glass Pure water is full of between glass (1 ').
- 4. high definition underwater video pick-up lens according to claim 1, it is characterised in that：The light bar (7) is electronic distant Control iris.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720613123.1U CN207037196U (en) | 2017-05-27 | 2017-05-27 | High definition underwater video pick-up lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720613123.1U CN207037196U (en) | 2017-05-27 | 2017-05-27 | High definition underwater video pick-up lens |
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| Publication Number | Publication Date |
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| CN207037196U true CN207037196U (en) | 2018-02-23 |
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ID=61470213
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167896A (en) * | 2017-05-27 | 2017-09-15 | 福鼎市雄光学仪器有限公司 | High definition underwater video pick-up lens |
-
2017
- 2017-05-27 CN CN201720613123.1U patent/CN207037196U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167896A (en) * | 2017-05-27 | 2017-09-15 | 福鼎市雄光学仪器有限公司 | High definition underwater video pick-up lens |
| CN107167896B (en) * | 2017-05-27 | 2023-04-28 | 福鼎市一雄光学仪器有限公司 | High-definition underwater video camera lens |
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