CN206057668U - A kind of focal length high magnification fog transparent camera lens - Google Patents
A kind of focal length high magnification fog transparent camera lens Download PDFInfo
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- CN206057668U CN206057668U CN201621040996.XU CN201621040996U CN206057668U CN 206057668 U CN206057668 U CN 206057668U CN 201621040996 U CN201621040996 U CN 201621040996U CN 206057668 U CN206057668 U CN 206057668U
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- camera lens
- high magnification
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Abstract
This utility model provides a kind of focal length high magnification fog transparent camera lens, including to start successively to configure combined focal length f1' along optical axis to focus direction be the front fixed group G1 of 150≤f1'≤200, the rear fixed group G4 that zoom group G2, f3' that combined focal length f2' is 35≤f2'≤20 is compensation group G3 of 35≤f3'≤55, combined focal length f4' is 700≤f4'≤500 in the direction of object；In this utility model, by the combination of above-mentioned technical proposal, formation one kind with focal length, high zoom ratio, the continuous zooming optical system of wide spectrum, the optical property parameter of the camera lens is：Zoom ratio is Γ, and 20≤Γ≤40.Its imaging spectral is 480nm ~ 950nm.Focal range is 15mm ~ 500mm.Imaging target surface size is 1/1.8 inch.As its imaging spectral includes infrared spectrum, and infrared spectrum be can be boisterous through haze etc., be a kind of focal length high magnification fog transparent camera lens.
Description
Technical field
This utility model is related to a kind of focal length high magnification fog transparent camera lens, and more particularly to a kind of focal length is 15-500mm
Camera lens.
Background technology
With the extensive application and intelligent transportation of safety monitoring technology, the establishment of safe city.Lens imaging and function
Require more and more higher.Especially environmental quality declines now, and the vile weather such as haze takes place frequently, and this design to optical system is proposed
New requirement.
In the urgent need to a kind of focal length high power monitoring camera for being capable of elegant mist, can continue to ring in vile weathers such as hazes
Border is monitored.
Utility model content
This utility model is in order to realize to continue to be monitored environment in vile weathers such as hazes, there is provided Yi Zhongchang
Burnt high magnification fog transparent camera lens.
The technical solution of the utility model is a kind of focal length high magnification fog transparent camera lens, including the direction of object is opened
Begin to organize G1, zoom group G2, compensation group G3, a rear fixed group G4 along the front fixation that optical axis is configured successively to focus direction；
Before described, combined focal length f1' of fixed group G1 is 150≤f1'≤200, including respectively low dispersion, light fire
Stone glass, the positive biconvex lens L1 of crown glass bear biconvex lens L2, positive biconvex concavees lens L3；
Combined focal length f2' of zoom group G2 is -35≤f2'≤- 20, glued thoroughly including negative biconcave lenss L4 and negative couple
Mirror L5, described negative biconcave lenss L4 are lanthanum flint glass, and described negative cemented doublet L5 is lanthanum crown glass and dense flint glass
Glass gluing is formed；
Combined focal length f3' of compensation group G3 is 35≤f3'≤55, including the positive lenticular by made by low dispersion
The mirror L6 and positive cemented doublet L7 by light flint and low dispersion gluing；
After described, combined focal length f4' of fixed group G4 is -700≤f4'≤- 500, including cemented doublet L8, positive convex-concave
Lens L9, negative cemented doublet L10, positive biconvex lens L11, respectively dense flint glass are glued with lanthanum flint glass, lanthanum crown glass
Glass, low dispersion and dense crown, crown glass composition.
In this utility model, by the combination of above-mentioned technical proposal, form a kind of with focal length, high zoom ratio, wide spectrum
Continuous zooming optical system, the optical property parameter of the camera lens is：Zoom ratio is Γ, and 20≤Γ≤40.Its into
As spectrum is 480nm～950nm.Focal range is 15mm～500mm.Imaging target surface size is 1/1.8 inch.Due to its imaging
Spectrum includes infrared spectrum, and infrared spectrum be can be boisterous through haze etc., therefore, be a kind of focal length high power
Rate fog transparent camera lens.
It is of the present utility model it is preferable that：Optical filter X is provided with after fixed group G4 in the rear, the optical filter X can
Filter out visible spectrum and allow the infrared light of 750nm～950nm all to pass through.Described compensation group G3 and rear fixed group G4 it
Between be additionally provided with aperture diaphragm O.I.e. arrange optical filter with remove optical filter optical system can blur-free imaging.So as to reach Penetrating Fog
Function.
This utility model is described in more detail with reference to specific embodiment.
Description of the drawings
Fig. 1 is：The simple index path of system-computed.
Fig. 2 is：System-computed initiating structure figure.
Fig. 3 is：System light path figure.
Fig. 4 is：MTF figures are imaged in conventional environment.
Fig. 5 is：Optical filter fog-penetrating imaging MTF figures are set.
Specific embodiment
Embodiment 1, the present embodiment is a kind of focal length high magnification fog transparent camera lens, the optical property parameter of optical system
For：Zoom ratio is Γ, and 20≤Γ≤40.Its imaging spectral is 480nm～950nm.Focal range is 15mm～500mm.Into
As target surface size is 1/1.8 inch.Aperture-coefficient is F# and 2.8≤F#≤6.4.Filter glass is provided with optical system.
The optical system of focal length high magnification fog transparent camera lens is mechanical compensation zoom mode specifically by front fixation
Group G1, zoom group G2, compensation group G3 fix group G4 compositions afterwards.As shown in figure 3, fixed group G1 is positive light coke and group before described
Complex focus are f1', 150≤f1'≤200, specifically by including by the positive biconvex lens L1 of low dispersion, light flint
Negative biconcave lenss L2 and crown glass positive biconvex lens L3 composition；Combined focal length f2' of zoom group G2 be -35≤f2'≤-
20, it is made up of negative biconcave lenss L4 and negative cemented doublet L5, and zoom group G2 can makees linear mobile along optical axis direction, move
Dynamic process is zoom process.Combined focal length f3' of compensation group G3 is 35≤f3'≤55, including being made up of low dispersion
Positive biconvex lens L6 and the positive cemented doublet L7 by light flint and low dispersion gluing；And compensation group G3 can
Make nonlinear moving along optical axis, its moving process is compensation process.Afterwards combined focal length f4' of fixed group G4 be -700≤f4'≤-
500, including by dense flint glass and the lanthanum flint glass gluing cemented doublet L8 for constituting, the positive convex-concave being made up of lanthanum crown glass
Negative cemented doublet L10 and biconvex lens are constituted by positive crown glass that lens L9, low dispersion and dense crown are constituted
L11.Aperture diaphragm O is located between compensation group G3 and rear fixed group G4.Optical filter X and the optical filtering are provided with after fixed group G4
Piece X may filter that visible spectrum and allows the infrared light of 750nm～950nm all to pass through, and in design of Optical System process lieutenant colonel
Just having the impact to being imaged free of light filter, that is, optical filter is set with remove optical filter optical system can blur-free imaging.So as to
Reach fog penetrating function.
Concrete optical system implementation process is as follows：If i is optional position and be short focus state during i=1 during zoom.i
It is most focal length state when=40.The vertical axle amplification of G2, G3, G4 is respectively m2, m3, m4；According to first-order theory：System in combination is burnt
Away from for：F'=f1'×m2×m3×m4F in formula1',m4For system constant.By changing m2, m3So that system focal f` changes
Become.The initial schematic diagram of optical texture is illustrated in figure 1, will be ensured during zoom that imaging surface is not moved and need to be met image altogether
Yoke is away from for invariant.
The l i.e. during zoom3'-l3+l2'-l2For invariant.According to first-order theory：
Because f3` and f2` is system constant, so zoom process needsIt is constant
Meet continuous vari-focus.
According to principles above：Design of Optical System is calculated, it is assumed that the combined focal length of zoom group G2 is f'2=-1, compensation
Group G3 combined focal lengths are f'3=-1.8；In most focal length position, that is, during i=33, amplification m'2And m'3It is -1；Most short
Burnt position, that is, during i=1, amplification m is calculated in such a way1And m2：
BecauseWhen most focal length, Γ (zoom ratio) is 40, so
According to above-mentioned continuous vari-focus principle：
Can obtain after substitution：
Parameter during short focus state：
The object distance of zoom group G2：
The image distance of zoom group G2：l'2=m2l2 (4)
The object distance of compensation group G3：
The image distance of compensation group G3：l'3=m3l2 (6)
Fixed group the distance between G1 and zoom group G2 d before taking12=0.8 (7)
Front fixed group G1 focal length f1For：f1=l2+d12 (8)
The distance between zoom group G2 and compensation group G3 d23=l'2-l3； (9)
Due to amplification m'2=1, object distance l of zoom group G22For：
Image distance l' of zoom group G22For：l'2=(1-m'2)f'2 (11)
Equally：Object distance l of compensation group G33For：
Image distance l' of compensation group G33For：l'3=(1-m'3)f'3 (13)
The distance between zoom group G2 and compensation group G3：d23=(- l3)-(-l'2) (14)
The distance between front fixed group G1 and zoom group G2：d12=f'1-l2 (15)
The amount of movement Δ of zoom group G22=focal length d12- short focus d12 (16)
The amount of movement of compensation group G3：Δ3=-(short focus d23-Δ2- focal length d23) (17)
By more than, the structural parameters of (1) to (17) calculating optical system can all be solved and can be obtained：At the beginning of optical system
Beginning framework is as shown in Figure 2.
To optical system framework hypostazation, group is fixed after aberration correction before G1 and is constituted by three, and in order to reduce aberration and
Second order spectrum employs low dispersion.Front fixed group G1 effects are this suitable position in correct position by image distant objects
It is set to the object distance position of zoom group G2.Zoom group G2 is made up of to light with lanthanum flint glass the lanthanum crown glass of two panels high index of refraction
There is a larger converging power, effect is change system multiplying power to be moved linearly along optical axis and focal length plays zoom effect.Compensation group
G3 is constituted by three and is employed low dispersion for correcting chromatic aberration and second order spectrum.Its role is to make non-linear fortune along optical axis
Image planes drift during dynamic compensation zoom ensures that the object-image conjugate thing of zoom group and compensation group during zoom is constant.It is solid afterwards
Surely organize G4 to be constituted by four, which mainly considers to correct system aberration and ensures focal length.Optical filter is provided with after latter fixed group,
The optical filter is characterised by being made up of low-index material, and thickness is not more than 5mm.Its Main Function is to filter off visible spectrum
The infrared light of 750nm～950nm is made all to pass through.Optimizing the optical system after arranging optical filter makes system as matter is not with optical filtering
Piece switching is arranged and is declined.It is illustrated in figure 4 system imaging MTF figures.Fig. 5 switches to the imaging under Penetrating Fog state for optical filter
MTF schemes.Understand that the system not only has day and night imaging function by Fig. 4,5, also with fog penetrating function.
Claims (3)
1. a kind of focal length high magnification fog transparent camera lens, including the direction of object start to focus direction to match somebody with somebody along optical axis successively
G1, zoom group G2, compensation group G3, a rear fixed group G4 are organized in the front fixation put；It is characterized in that：
Before described, combined focal length f1' of fixed group G1 is 150≤f1'≤200, including respectively by low dispersion constitute it is just double
Convex lenss L1, the negative biconvex lens L2 being made up of light flint and the positive biconvex concavees lens L3 being made up of crown glass；
Combined focal length f2' of zoom group G2 is -35≤f2'≤- 20, including negative biconcave lenss L4 and negative cemented doublet
L5, described negative biconcave lenss L4 are lanthanum flint glass, and described negative cemented doublet L5 is lanthanum crown glass and dense flint glass
Glass gluing is formed；
Combined focal length f3' of compensation group G3 is 35≤f3'≤55, including the positive biconvex lens by made by low dispersion
The L6 and positive cemented doublet L7 by light flint and low dispersion gluing；
After described, combined focal length f4' of fixed group G4 is -700≤f4'≤- 500, including by dense flint glass and lanthanum flint glass
The cemented doublet L8 of the glued composition of glass, the positive convexoconcave lenss L9 being made up of lanthanum crown glass, by low dispersion and dense crown
Negative cemented doublet L10, the positive biconvex lens L11 being made up of crown glass of composition.
2. focal length high magnification fog transparent camera lens according to claim 1, it is characterised in that：Group G4 is fixed in the rear
After be provided with optical filter X, the optical filter X may filter that visible spectrum and allow the infrared light of 750nm ~ 950nm all to pass through.
3. focal length high magnification fog transparent camera lens according to claim 1 and 2, it is characterised in that：In described compensation
Aperture diaphragm O is additionally provided between group G3 and rear fixed group G4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621040996.XU CN206057668U (en) | 2016-09-06 | 2016-09-06 | A kind of focal length high magnification fog transparent camera lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621040996.XU CN206057668U (en) | 2016-09-06 | 2016-09-06 | A kind of focal length high magnification fog transparent camera lens |
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| CN206057668U true CN206057668U (en) | 2017-03-29 |
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| CN201621040996.XU Expired - Fee Related CN206057668U (en) | 2016-09-06 | 2016-09-06 | A kind of focal length high magnification fog transparent camera lens |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107170239A (en) * | 2017-06-30 | 2017-09-15 | 广东工业大学 | A kind of target vehicle follows the trail of grasp shoot method and device |
| CN112666691A (en) * | 2020-12-22 | 2021-04-16 | 福建福光股份有限公司 | Medium-long-focus low-light-level lens with wide waveband and large image surface and imaging method thereof |
-
2016
- 2016-09-06 CN CN201621040996.XU patent/CN206057668U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107170239A (en) * | 2017-06-30 | 2017-09-15 | 广东工业大学 | A kind of target vehicle follows the trail of grasp shoot method and device |
| CN112666691A (en) * | 2020-12-22 | 2021-04-16 | 福建福光股份有限公司 | Medium-long-focus low-light-level lens with wide waveband and large image surface and imaging method thereof |
| CN112666691B (en) * | 2020-12-22 | 2023-03-10 | 福建福光股份有限公司 | Medium-long-focus low-light-level lens with wide waveband and large image surface and imaging method thereof |
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