CN207440380U - A kind of antidamping Penetrating Fog visible light lens - Google Patents
A kind of antidamping Penetrating Fog visible light lens Download PDFInfo
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- CN207440380U CN207440380U CN201721436331.5U CN201721436331U CN207440380U CN 207440380 U CN207440380 U CN 207440380U CN 201721436331 U CN201721436331 U CN 201721436331U CN 207440380 U CN207440380 U CN 207440380U
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Abstract
The utility model discloses a kind of antidamping Penetrating Fog visible light lens, in optical system, light is incident from front to back, successively equipped with focal power is positive first fixed group, focal power is negative zoom group, focal power is negative compensation group, focal power is latter fixed group positive and light cutoff filter group, when video camera is when using in the greasy weather, imaging light is near infrared light, so adding 0.76um 0.9um Penetrating Fog optical filters.When video camera on daytime in use, imaging light is visible ray, it is impossible to use 0.76um 0.9um Penetrating Fog optical filters.In 0.76um 0.9um Penetrating Fog optical filter handoff procedures, the position of imaging surface changes, and in order to eliminate, this variation increases compensation light path pieces.Real Penetrating Fog processing is realized, lens design is general simple, has and preferably popularizes type.
Description
Technical field
The utility model belongs to field of photoelectric technology, and in particular to a kind of antidamping Penetrating Fog visible light lens and realization side
Method can obtain clear image in the case where there is foggy environment.
Background technology
With the worsening of surroundings, under haze weather, the video monitoring system based on common lens is supervised
The picture contrast controlled is lower, and color is dimmed, and image attenuation is serious, affects the observation effect to target, can not be effectively right
Observation is identified in target detail.
The development of video monitoring camera is not only required in observation effect under good environment " seeing clearly ", " looking far ".More
It is required that there is equal detectivity and clarity under haze environment.There are two types of common Penetrating Fog methods：One kind is optical frames
Head Penetrating Fog design, is exactly to utilize near infrared ray（0.76 μm -1.1 μm of wavelength）The principle of diffraction molecule, it is clear to promote picture
Clear degree.One kind is image procossing Penetrating Fog technology, mainly carries out quality improvement to the image collected by various algorithms.With reference to
Two methods could realize real Penetrating Fog, and it is its pass that remote observation Penetrating Fog quality how is efficiently promoted in telephoto lens
Key.
Utility model content
The utility model provide it is a kind of be conveniently adjusted, antidamping Penetrating Fog visible light lens simple in structure, in haze weather
Under, it by optical texture, prevents attenuated optical signal, increases relative aperture and reduce the curvature of field, illuminance of image plane increase makes image more
It is clear to add, and promotes telephoto lens remote observation Penetrating Fog quality.
To achieve the above object, the technical solution adopted in the utility model：A kind of antidamping Penetrating Fog visible light lens, it is special
Sign is：In the optical system of the antidamping Penetrating Fog visible light lens, light is incident from front to back, successively equipped with focal power for just
First fixed group, focal power be negative zoom group, focal power is negative compensation group, focal power is positive latter fixed group and cut-off filter
Light group；Fixed group includes the first negative lens set gradually from front to back, the first positive lens, the second negative lens, second before described
Positive lens, wherein the first negative lens and the first positive lens are glued together；The zoom group includes what is set gradually from front to back
First meniscus lens, the first biconcave lens, the first biconvex lens and the second biconcave lens.Wherein the first biconvex lens and second pair
Concavees lens are glued together；The compensation group includes being set gradually from front to back as the 3rd positive lens, the 3rd negative lens, the 4th just
Lens and the 5th positive lens, wherein the 3rd negative lens and the 4th positive lens are glued together；Fixed group is included from forward direction after described
The 3rd biconcave lens, the second biconvex lens, the second crescent moon lens, the 3rd crescent moon lens and the 3rd lenticular set gradually afterwards
Mirror, wherein the 3rd biconcave lens and the second biconvex lens are glued together, the 3rd crescent moon lens and the 3rd biconvex lens are glued at
Together；The light cutoff filter group includes being set gradually from up to down as near infrared prevention optical filter and compensation light path piece；Before described
Airspace between fixed group and zoom group is 4mm~138.7mm, and the airspace between compensation group and rear fixed group is
62.99mm~11.25mm, and equipped with diaphragm, airspace is 30mm between rear fixed group and light cutoff filter group；The zoom group
It is moved forward and backward along optical axis, compensation group is moved forward and backward along optical axis, and zoom group and the compensation group direction of motion are on the contrary, the near infrared prevention
Optical filter and compensation light path piece are respectively arranged with optical filter mobile device and limit switch, and light cutoff filter group is along vertical optical axis direction
It moves up and down, compensation light path piece is moved into light path when being used on daytime, move near infrared filter when greasy weather use
In light path.
Airspace before described between first negative lens glued in fixed group, the first positive lens and the second negative lens is
4mm, airspace between the second negative lens and the second positive lens are 4.3mm, the first meniscus lens and the in the zoom group
Airspace between one biconcave lens is glued for 2.6mm, the first biconcave lens and the first biconvex lens and the second biconcave lens
In lens, airspace between the first biconvex lens is 2.6mm, in the compensation group the 3rd positive lens and the 3rd negative lens and
Airspace in 4th positive lens balsaming lens between the 3rd negative lens is 0.35mm, the 5th positive lens and in balsaming lens the
Airspace between four positive lens is 0.3mm, and the 3rd biconcave lens of balsaming lens, the second biconvex lens in group are fixed after described
Front sets light bar, and the airspace in balsaming lens between the second biconvex lens and the second crescent moon lens is 13.9mm, and second
Airspace in crescent moon lens and the 3rd crescent moon lens of balsaming lens and the 3rd biconvex lens between the 3rd crescent moon lens is
1.58mm。
The near infrared prevention optical filter is 0.76um-0.9um Penetrating Fog optical filters.
The utility model advantageous effect：The utility model provides a kind of telephoto lens antidamping fog penetration lens design.It is logical
Optics Penetrating Fog structure design is crossed, realizes real Penetrating Fog processing, lens design is general simple, has and preferably popularizes
Type.
Ultra-wideband antireflective film is coated on optical element, the transmitance of 0.47um-0.9um wavelength bands is promoted, prevents light
Signal is decayed；Light path system increase disappears veiling glare light bar；Veiling glare is reduced during the Calculation of Optical Path to enter imaging optical path and reduce vignetting.
When video camera in the greasy weather in use, imaging light is near infrared light, so adding the filter of 0.76um-0.9um Penetrating Fogs
Mating plate.When video camera on daytime in use, imaging light is visible ray, it is impossible to use 0.76um-0.9um Penetrating Fog optical filters.
In 0.76um-0.9um Penetrating Fog optical filter handoff procedures, the position of imaging surface changes.In order to eliminate this variation increases
Compensate light path piece.
With CCD or CMOS, the raising of technique production technique, pixel size can accomplish several microns, and this requires mirrors
Head resolution ratio is high, i.e., should be greater than 0.3 in the MTF of high frequency section.The contrast of the relatively low target imaging of brightness can be improved, is reduced
Picture signal processing load.
Description of the drawings
Fig. 1 is home state optical system diagram；
Fig. 2 is short focus state optical system diagram；
Fig. 3 is mid-focal length state optical system diagram；
Fig. 4 is long-focus state optical system diagram；
Fig. 5 is home pattern MTF curve figure；
Fig. 6 is Penetrating Fog environmental pattern MTF curve figure.
Specific embodiment
A kind of antidamping Penetrating Fog visible light lens as described in Fig. 1-4, the optical system of the antidamping Penetrating Fog visible light lens
In system, light is incident from front to back, is successively positive preceding fixed group A equipped with focal power, focal power is negative zoom group B, light focus
It is positive rear fixed group D and light cutoff filter group E to spend for negative compensation group C, focal power；Fixed group A is included from front to back before described
The first negative lens A-1, the first positive lens A-2, the second negative lens A-3, the second positive lens A-4 set gradually, wherein first is negative
Lens A-1 and the first positive lens A-2 are glued together；It is saturating that the zoom group B includes the first bent moon set gradually from front to back
Mirror B-1, the first biconcave lens B-2, the first biconvex lens B-3 and the second biconcave lens B-4.Wherein the first biconvex lens B-3 and
Second biconcave lens B-4 is glued together；The compensation group C includes being set gradually from front to back as the 3rd positive lens C-1, the 3rd
Negative lens C-2, the 4th positive lens C-3 and the 5th positive lens C-4.Wherein the 3rd negative lens C-2 and the 4th positive lens C-3 are glued at
Together；Fixed group D includes the 3rd biconcave lens D-1 set gradually from front to back, the second biconvex lens D-2, second after described
Crescent moon lens D-3, the 3rd crescent moon lens D-4 and the 3rd biconvex lens D-5, wherein the 3rd biconcave lens D-1 and the second lenticular
Mirror D-2 is glued together, and the 3rd crescent moon lens D-4 and the 3rd biconvex lens D-5 are glued together；The light cutoff filter group E bags
It includes and is set gradually from up to down as near infrared prevention optical filter E-1 and compensation light path piece E-2；Fixed group A and zoom group B before described
Between airspace for 4mm~138.7mm, airspace between compensation group C and rear fixed group D for 62.99mm~
11.25mm, and equipped with diaphragm F, airspace is 30mm between rear fixed group D and light cutoff filter group；The zoom group B is along optical axis
It moves forward and backward, compensation group C is moved forward and backward along optical axis, and zoom group B and the compensation group C directions of motion are on the contrary, the near infrared prevention is filtered
Mating plate E-1 and compensation light path piece E-2 are respectively arranged with optical filter mobile device and limit switch, and light cutoff filter group is along vertical optical axis
Direction moves up and down, and moves into compensation light path piece E-2 in light path when being used on daytime, when using in the greasy weather by near infrared filter
Piece E-1 is moved into light path.
Before described between the first negative lens A-1, the first positive lens A-2 and the second negative lens A-3 glued in fixed group A
Airspace is 4mm, and the airspace between the second negative lens A-3 and the second positive lens A-4 is 4.3mm, in the zoom group B
Airspace between first meniscus lens B-1 and the first biconcave lens B-2 is 2.6mm, the first biconcave lens B-2 and first pair
In convex lens B-3 and the second biconcave lens B-4 balsaming lens, airspace between the first biconvex lens B-3 is 2.6mm, institute
State in compensation group C the 3rd negative lens C-2 in the 3rd positive lens C-1 and the 3rd negative lens C-2 and the 4th positive lens C-3 balsaming lens
Between airspace for 0.35mm, the airspace in the 5th positive lens C-4 and balsaming lens between the 4th positive lens C-3 is
0.3mm sets light bar in fixed group after described before the 3rd biconcave lens D-1 of balsaming lens, the second biconvex lens D-2, glued
Airspace in lens between the second biconvex lens D-2 and the second crescent moon lens D-3 is 13.9mm, the second crescent moon lens D-3
Airspace between the 3rd crescent moon lens D-4 in balsaming lens the 3rd crescent moon lens D-4 and the 3rd biconvex lens D-5 is
1.58mm。
The near infrared prevention optical filter is 0.76um-0.9um Penetrating Fog optical filters.
The zoom group B is moved forward and backward along optical axis in this embodiment, and compensation group C is moved forward and backward along optical axis.Zoom group B and benefit
It is opposite to repay group C directions of motion.It is configured with optical filter mobile device and limit switch, light cutoff filter group is along above and below vertical optical axis direction
Movement.Compensation light path piece E-2 is moved into light path when being used on daytime, move near infrared filter E-1 when greasy weather use
Enter in light path.
The antidamping Penetrating Fog visible light lens, in order to solve under foggy environment, long focus video camera remote monitor target
It is required that in terms of optics Penetrating Fog, to meet the requirement of high-definition camera resolution ratio, according to the Design of Mathematical Model of greasy weather illuminance of image plane
Camera lens selects ultra-low dispersion optical material, its internal transmitance is made to be more than 98%；Camera lens is enable to be imaged in wide spectral range；
0.76-0.9 μm of Penetrating Fog optical filter of wavelength is selected to carry out aberration correction, camera lens is made to form high-resolution near infrared band；
The evaluation of aberration improves the knot image force of object lens according to the characteristic of greasy weather target contrast, and the MTF of low frequency part is more than
90%, intermediate-frequency section MTF are more than 80%, and high frequency section MTF is more than 30%, realize that greasy weather image quality is excellent, meanwhile, in order to full
The requirement of sufficient imaging on daytime, aberration correction has been carried out to F light D light C light.
Ultra-wideband antireflective film is coated on optical element, the transmitance of 0.47um-0.9um wavelength bands is promoted, prevents light
Signal is decayed, and is increased relative aperture and is reduced the curvature of field, and illuminance of image plane increase becomes apparent from image, fixes group in the past
Focal length F1 ＇ focal lengths are 174.39mm, and the focal length of zoom group is F2 ＇=- 16.94mm；Focal length F3 ＇=41.39mm of compensation group.
The optical system being made of above-mentioned eyeglass reaches following optical index：
1st, focal length：F '=85mm~850mm
2nd, zoom ratio:10X
3rd, maximum relative aperture:D/F=1/6
4th, maximum field of view angle：2W=0.6 °~6 °
5th, Penetrating Fog optical filter penetrates spectrum：0.76um-0.9um
In this embodiment, image exports clear image by camera lens.Pass through Fig. 5 home pattern MTF curve figures and Fig. 6
The control of Penetrating Fog environmental pattern MTF curve figure is as can be seen that greasy weather lens imaging effect is realized close to the image quality for there be not mist environment
Real Penetrating Fog processing.
Claims (3)
1. a kind of antidamping Penetrating Fog visible light lens, it is characterised in that：In the optical system of the antidamping Penetrating Fog visible light lens,
Light is incident from front to back, is successively positive first fixed group equipped with focal power, focal power is negative zoom group, focal power is negative
Compensation group, focal power are positive latter fixed group and light cutoff filter group；Fixed group includes setting gradually from front to back before described the
One negative lens, the first positive lens, the second negative lens, the second positive lens, wherein the first negative lens and the first positive lens are glued at one
It rises；The zoom group includes the first meniscus lens set gradually from front to back, the first biconcave lens, the first biconvex lens and the
Two biconcave lens, wherein the first biconvex lens and the second biconcave lens are glued together；The compensation group include from front to back according to
It is secondary to be arranged to the 3rd positive lens, the 3rd negative lens, the 4th positive lens and the 5th positive lens, wherein the 3rd negative lens and the 4th is just thoroughly
Mirror is glued together；Fixed group includes the 3rd biconcave lens set gradually from front to back, the second biconvex lens, second after described
Crescent moon lens, the 3rd crescent moon lens and the 3rd biconvex lens, wherein the 3rd biconcave lens and the second biconvex lens are glued together,
3rd crescent moon lens and the 3rd biconvex lens are glued together；The light cutoff filter group includes being set gradually from up to down to be near red
Outer edge filter and compensation light path piece；Airspace before described between fixed group and zoom group is 4mm~138.7mm, is mended
The airspace repaid between group and rear fixed group is 62.99mm~11.25mm, and equipped with diaphragm, rear fixed group and light cutoff filter
Airspace is 30mm between group；The zoom group is moved forward and backward along optical axis, and compensation group is moved forward and backward along optical axis, zoom group and benefit
Group direction of motion is repaid on the contrary, the near infrared prevention optical filter and compensation light path piece are respectively arranged with optical filter mobile device and limit
Bit switch, light cutoff filter group move up and down along vertical optical axis direction, move into compensation light path piece in light path when being used on daytime,
Near infrared filter is moved into light path when using in the greasy weather.
2. antidamping Penetrating Fog visible light lens as described in claim 1, it is characterised in that：Before described glued the in fixed group
Airspace between one negative lens, the first positive lens and the second negative lens is 4mm, between the second negative lens and the second positive lens
Airspace for 4.3mm, the airspace in the zoom group between the first meniscus lens and the first biconcave lens is
In 2.6mm, the first biconcave lens and the first biconvex lens and the second biconcave lens balsaming lens, the sky between the first biconvex lens
Gas is at intervals of 2.6mm, the 3rd positive lens and the in the 3rd negative lens and the 4th positive lens balsaming lens the 3rd negative in the compensation group
Airspace between lens is 0.35mm, and the airspace in the 5th positive lens and balsaming lens between the 4th positive lens is
0.3mm, the 3rd biconcave lens of balsaming lens in fixed group after described set light bar before second biconvex lens, in balsaming lens
Airspace between second biconvex lens and the second crescent moon lens is 13.9mm, the second crescent moon lens and balsaming lens March
Airspace in tooth lens and the 3rd biconvex lens between the 3rd crescent moon lens is 1.58mm.
3. antidamping Penetrating Fog visible light lens as described in claim 1, it is characterised in that：The near infrared prevention optical filter is
0.76um-0.9um Penetrating Fog optical filters.
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| CN201721436331.5U CN207440380U (en) | 2017-11-01 | 2017-11-01 | A kind of antidamping Penetrating Fog visible light lens |
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| CN201721436331.5U CN207440380U (en) | 2017-11-01 | 2017-11-01 | A kind of antidamping Penetrating Fog visible light lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643591A (en) * | 2017-11-01 | 2018-01-30 | 河南中光学集团有限公司 | A kind of antidamping Penetrating Fog visible light lens and implementation method |
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- 2017-11-01 CN CN201721436331.5U patent/CN207440380U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643591A (en) * | 2017-11-01 | 2018-01-30 | 河南中光学集团有限公司 | A kind of antidamping Penetrating Fog visible light lens and implementation method |
| CN107643591B (en) * | 2017-11-01 | 2023-08-15 | 河南中光学集团有限公司 | Anti-attenuation fog-penetrating visible light lens and implementation method |
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