CN107193116B - Big zoom ratio medium wave infrared continuous zoom lens - Google Patents
Big zoom ratio medium wave infrared continuous zoom lens Download PDFInfo
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- CN107193116B CN107193116B CN201710547355.6A CN201710547355A CN107193116B CN 107193116 B CN107193116 B CN 107193116B CN 201710547355 A CN201710547355 A CN 201710547355A CN 107193116 B CN107193116 B CN 107193116B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
- G02B15/167—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
- G02B15/173—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +-+
Abstract
The present invention relates to a kind of big zoom ratio medium wave infrared continuous zoom lens, including lens barrel, optical system in lens barrel is set, the optical system includes the preceding fixed group A being positive along the light focal power that incident direction is set gradually from left to right, the zoom group B that focal power is negative, the compensation group C that focal power is positive, the secondary imaging group E composition that the rear fixed group D and focal power that focal power is negative are positive, preceding fixed group is positive meniscus lens A, zoom group is double-concave negative lens B, compensation group is biconvex lens C, fixed group is diverging meniscus lens D afterwards, secondary imaging group includes the biconvex positive lens E1 set gradually, double-concave negative lens E2, biconvex positive lens E3, structure of the invention design is simple, it is compact, rationally, the camera lens has big zoom ratio, amplification factor is high, it is simple and compact for structure, imaging definition is high, processing cost is low The advantages that, it can be achieved that electric continuous zooming heat, electromotion focusing, focal length Real-time Feedback, the real-time output function of image.
Description
Technical field
The present invention relates to a kind of big zoom ratio medium wave infrared continuous zoom lens.
Background technique
With the expansion and deeply in people's production and living field, strong antijamming capability that infrared lens have with it, can be complete
The advantages that weather round-the-clock works, anti-flue dust and haze ability are strong, in fields pair such as road monitoring, forest fire protection, airport supervision
Infrared optical system has urgent application demand.Wherein infrared continuous zoom lens because its focal length can consecutive variations, can
It is a wide range of to carry out targeted surveillance and search, but energy amplification target examines, and target information will not be lost in zooming procedure
Feature has been to be concerned by more and more people.However existing infrared zoom lens size is bigger than normal, zoom magnification is small, visits
From short, imaging image quality amount is bad for ranging, limited to the search and recognition capability of infrared target, limits its applicability and uses model
It encloses.
Summary of the invention
In view of the deficiencies in the prior art, technical problem to be solved by the invention is to provide a kind of big zoom ratio medium-wave infrareds
Continuous magnification lens.
In order to solve the above-mentioned technical problem, the technical scheme is that a kind of big zoom ratio medium-wave infrared continuous vari-focus
Camera lens, including lens barrel, the optical system being arranged in lens barrel, the optical system include along light from left to right incident direction according to
Compensation group C, the focal power that A, the zoom group B that focal power is negative, focal power are positive are organized in the preceding fixation that the focal power of secondary setting is positive
The secondary imaging group E composition that the rear fixed group D and focal power being negative are positive, preceding fixed group is positive meniscus lens A, and zoom group is double
Recessed negative lens B, compensation group are biconvex lens C, and rear fixed group is diverging meniscus lens D, and secondary imaging group includes pair set gradually
Convex positive lens E1, double-concave negative lens E2, biconvex positive lens E3.
Further, the airspace between the preceding fixed group A and zoom group B is 20.02~57.7mm, the zoom
Airspace between group B and compensation group C is 100.03~24.22mm, the air between the compensation group C and rear fixed group D
Between be divided into 6.15~44.28mm, the airspace between biconvex positive lens E1 and double-concave negative lens E2 is 7.32mm, and concave-concave is negative saturating
Airspace between mirror E2 and biconvex positive lens E3 is 1.3mm.
Further, each lens materials of the optical system press along light incident direction sequence be respectively silicon, germanium, silicon,
Germanium, silicon, germanium, silicon.
Further, double-concave negative lens B rear end face, diverging meniscus lens D rear end face, biconvex positive lens E1 rear end face and double
Convex positive lens E3 front end face is aspherical.
Further, described aspherical to meet following expression formula:
Wherein, Z be it is aspherical along optical axis direction when being highly the position of r, away from aspheric vertex of surface apart from rise；C=1/
The paraxial curvature radius of R, R expression mirror surface；K is circular cone coefficient；A, B, C, D are high order aspheric surface coefficient.
Compared with prior art, the invention has the following advantages: structure design is simple, compact, reasonable, camera lens tool
There are the advantages such as big zoom ratio, amplification factor are high, simple and compact for structure, and imaging definition is high, and processing cost is low, it can be achieved that electronic company
Continuous zoom, electromotion focusing, focal length Real-time Feedback, the real-time output function of image.
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
Detailed description of the invention
Fig. 1 is the schematic diagram of optical system of the embodiment of the present invention；
Fig. 2 is the camera lens mechanical structure schematic diagram of the embodiment of the present invention；
Fig. 3 is the lens construction perspective view of the embodiment of the present invention；
Fig. 4 is the camera lens power zoom structural scheme of mechanism of the embodiment of the present invention；
Fig. 5 is the camera lens Power focus structural scheme of mechanism of the embodiment of the present invention；
Fig. 6 is the shot detection device aligning gear schematic diagram of the embodiment of the present invention.
In figure:
The positive bent moon positive lens A of A-；B- double-concave negative lens B；C- biconvex lens C；The negative bent moon negative lens D of D-；E1- biconvex is just saturating
Mirror E-1, E2- double-concave negative lens E-2, E3- biconvex positive lens E-3, F- reflecting mirror, 2-1. variable focus package, 2-2. focus pack, 2-
3. baffle changeover module, pressing ring, 4-2. lens A, 4-3. guide rod pressing plate, 4-4. zoom clamp ring, 4-5. zoom pressure are organized before 4-1.
Circle, 4-6. lens B, 4-7. zoom microscope base, 4-8. zoom Mobile base, 4-9. body tube, 4-10. guide rod, 4-11. zoom guide sleeve,
4-12. zoom cam, 4-13. compensate guide sleeve, 4-14. zoom lead ring, 4-15. zoom roller, 4-16. zoom guide pin, 4-17. steel
Pearl, 4-18. compensate Mobile base, and 4-19. compensates pressing ring, 4-20. lens C, 4-21. zoom cam pressing ring, 4-22 zoom current potential
Device, 4-23. zoom potentiometer frame, 4-24. zoom motor rack, 4-25. zoom motor, 5-1. focusing barrel, 5-2. focus lamp
Seat, 5-3. focus pressing ring, and 5-4. focuses microscope base pressing ring, and 5-5. eyeglass D, 5-6. focus roller 1, and 5-7. focuses lead ring, and 5-8. is poly-
Burnt roller 2,5-9. focus guide pin, lens barrel after 5-10., and 5-11. focuses cam, and 5-12.. focuses cam pressing ring, 5-13. turnover
Lens barrel 1,5-14. reflecting mirror microscope base 1,5-15. reflecting mirror pressing ring 1,5-16. reflecting mirror 1,5-17. focus motor, 5-18. zoom
Switch frame 1,5-19. focus motor frame, 5-20. zoom switch frame 2,5-21. zoom microswitch, 5-22. Focusion switch frame 1,
5-23. focuses microswitch, 5-24. Focusion switch frame 2,6-1. detector carriage, 6-2. detector movable plate, 6-3. infrared acquisition
Device, 6-4. detector auxiliary stand, 6-5. shutter, 6-6. baffle cross wheel shaft, 6-7. baffle third wheel, 6-8. baffle motor rack,
6-9. baffle motor, 6-10. apron block, 6-11. transfer microscope base 2, and microscope base 2 is organized after 6-12., organizes microscope base 1,6-14. after 6-13.
Pressing ring 1 is organized afterwards, and 6-15. lens E1,6-16. reflecting mirror 2,6-17. reflecting mirror pressing ring 2,6-18. reflecting mirror microscope base 2,6-19. is saturating
Spacer ring is organized after mirror E2,6-20. lens E3,6-21., group pressing ring 2 after 6-22., 6-23. damper shaft, 6-24. baffle microswitch,
6-25. baffle.
Specific embodiment
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and cooperate attached drawing, make detailed
Carefully it is described as follows.
As shown in Fig. 1 ~ 6, a kind of big zoom ratio medium wave infrared continuous zoom lens including lens barrel, are arranged in lens barrel
Optical system, the optical system include first fixed group to be positive along the light focal power that incident direction is set gradually from left to right
A, what the rear fixed group D and focal power that compensation group C that focal power is negative zoom group B, focal power are positive, focal power are negative were positive
Secondary imaging group E composition, preceding fixed group are positive meniscus lens A, and zoom group is double-concave negative lens B, and compensation group is biconvex lens C,
Fixed group is diverging meniscus lens D afterwards, and secondary imaging group includes the biconvex positive lens E1 set gradually, double-concave negative lens E2, biconvex
Positive lens E3.
In the present embodiment, the airspace between the preceding fixed group A and zoom group B is 20.02~57.7mm, described
Airspace between zoom group B and compensation group C is 100.03~24.22mm, between the compensation group C and rear fixed group D
Airspace is 6.15~44.28mm, and the airspace between biconvex positive lens E1 and double-concave negative lens E2 is 7.32mm, concave-concave
Airspace between negative lens E2 and biconvex positive lens E3 is 1.3mm.
In the present embodiment, each lens materials of the optical system press along light incident direction sequence be respectively silicon, germanium,
Silicon, germanium, silicon, germanium, silicon.
In the present embodiment, double-concave negative lens B rear end face, diverging meniscus lens D rear end face, biconvex positive lens E1 rear end face with
And biconvex positive lens E3 front end face is aspherical.
In the present embodiment, described aspherical to meet following expression formula:
Wherein, Z be it is aspherical along optical axis direction when being highly the position of r, away from aspheric vertex of surface apart from rise；C=1/
The paraxial curvature radius of R, R expression mirror surface；K is circular cone coefficient；A, B, C, D are high order aspheric surface coefficient.
Each lens parameters are as follows:
Aspherical surface data is as follows:
In the present embodiment, following optical index has been reached by the optical texture that above-mentioned lens set is constituted:
(1) focal length: f '=30~360mm, zoom ratio is up to 12 times；
(2) visual field scope: 23.2 °~1.96 °；
(3) relative aperture: 1:4；
(4) be adapted to detector: adapting to target surface is 320*240, and the refrigeration mode medium-wave infrared that Pixel size is 30um detects
Device；
(5) operating temperature: -40 DEG C~+60 DEG C；
(6) light path system volume is less than 140mm(wide) * 140mm(high) * 225(long).
In the present embodiment, lens construction is set in the mechanical structure of the camera lens as shown in Fig. 2 ~ 3 using existing structure
There are variable focus package 2-1, focus pack 2-2, baffle changeover module 2-3.The variable focus package of the camera lens includes first fixed group, zoom
Group, compensation group and zoom mechanism, the focus pack of the camera lens fix group, focusing and reflection microscope group, the mirror after including
The baffle changeover module of head includes reflection microscope group, baffle switching mechanism and detector assembly.
As shown in figure 4, the zoom group lens B(4-6) with zoom pressing ring 4-5, zoom microscope base 4-7, zoom retainer 4-4,
Zoom Mobile base 4-8, zoom guide sleeve 4-11 are assembled into zoom component.The compensation lens C(4-20) and compensation pressing ring 4-19, benefit
Repay Mobile base 4-18, compensation guide sleeve 4-13 is assembled into compensation component.The zoom component and compensation component are mounted on guide rod 4-10
It goes up and is slidably matched, three guide rods are separately fixed on body tube 4-9 by guide rod pressing plate 4-3.The zoom cam 4-12 is logical
It crosses steel ball 4-17 to be placed on body tube 4-9 and compressed with zoom cam pressing ring 4-21, forms rolling bearing structure.The zoom
Cam 4-12 processes two zooms and compensated curve slot by the requirement of the optical zoom characteristics of motion.The zoom roller 4-15 and change
Times lead ring 4-14 is assembled into guide pin component.Zoom component and compensation component are linked together by 2 guide pin components.Before described
Fixed group lens A(4-2) it is installed on the front end body tube 4-9 and is fixed and clamped by preceding group of pressing ring 4-1.The zoom motor 4-25
It is mounted on body tube 4-9 by zoom motor rack 4-24.The zoom potentiometer 4-22 is pacified by zoom potentiometer frame 4-23
On body tube 4-9.When the work of zoom motor 4-25, passband moves zoom cam 4-12 rotation, then passes through guide pin component
The rotary motion of zoom cam 4-12 is converted into the axial movement of zoom component and compensation component, to realize lens focus
Consecutive variations complete zooming procedure.Meanwhile the rotation of the zoom cam 4-12 drives zoom potentiometer 4-22 rotation, thus
So that its resistance value is changed, forms one-to-one relationship between focal length and resistance value as a result, it can be real by this approach sensor
The preparatory function of existing focal length.
As shown in figure 5, it is described after organize lens D(5-5), focus pressing ring 5-3, focus microscope base 5-2, focusing barrel 5-1, focus
Microscope base pressing ring 5-4 is assembled into focus pack.The focusing roller 1(5-6), focus lead ring 5-7, focus roller 2(5-8), focus
Guide pin 5-9 forms guide pin component.Precision machined 2 180 ° uniformly distributed straight troughs are offered after described on lens barrel 5-10, with guide pin group
Part is slidably matched.Precision machined 2 180 ° of routability skewed slots are offered on the focusing cam 5-11, by focusing cam
Pressing ring 5-12 is mounted on rear lens barrel 5-9.The reflecting mirror 1(5-16) pass through reflecting mirror microscope base 1(5-14) and reflecting mirror pressing ring 1
(5-15) is mounted on turnover microscope base 1(5-13) on.The turnover microscope base 1(5-13) it is connected by screw on rear lens barrel 5-9.Institute
It states focus motor 5-17 to be mounted on rear lens barrel 5-9 by focus motor frame 5-19,2 focusing microswitches 5-23 passes through
With regard to Focusion switch frame 1(5-22) and Focusion switch frame 2(5-24) be separately mounted on rear lens barrel 5-9, when focus motor 5-17 work
It when making, drives and focuses cam 5-11 rotation, the rotary motion for focusing cam 5-11 is converted to by focus pack by guide pin component
Axial movement, to realize the focusing function of camera lens.Moreover, 2 zoom microswitch 5-21 pass through zoom switch frame 1
(5-18) and zoom switch frame 2(5-20) it is separately mounted on rear lens barrel 5-10, to make more compact structure.
As shown in fig. 6, it is described after organize lens E1(6-15) pass through after organize pressing ring 1(6-14) be installed on rear group of microscope base 1(6-
13) lens E2(6-19 is organized after, described), rear group spacer ring 6-21, rear group lens E3 organize pressing ring 2(6-22 after passing through) be installed on rear group
Microscope base 2(6-12).Microscope base 1(6-13 is organized after described) and rear group microscope base 2(6-12) by being threadably mounted at turnover microscope base 2(6-11)
On.The reflecting mirror 2(6-16) pass through reflecting mirror microscope base 2(6-18) and reflecting mirror pressing ring 2(6-17) it is mounted on turnover microscope base 2
On (6-11).The apron block 6-10 is fixed by screws in turnover microscope base 2(6-11) on.The baffle 6-25 passes through damper shaft
6-23 is movably arranged on apron block 6-10.The baffle motor 6-9 is mounted on apron block 6-10 by baffle motor rack 6-8
On, the position for the two sides apron block 6-10 overhead gage 6-25 that 2 baffle microswitches 6-24 is separately mounted to.The baffle
Lid 6-5 is mounted on apron block 6-10 by screw.The detector 6-3 is moved by detector auxiliary stand 6-4 and detector
Movable plate 6-2 is fixed on detector carriage 6-1.The detector carriage 6-1 is fixed on shutter 6-5 by screw.Work as gear
When board motor 6-9 works, baffle 6-25 rotation is driven, to play baffle to switching, realizes the calibration function of detector.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, is all covered by the present invention.
Claims (3)
1. a kind of big zoom ratio medium wave infrared continuous zoom lens, it is characterised in that: including lens barrel, the optics being arranged in lens barrel
System, the optical system include preceding fixed the group A, light being positive along the light focal power that incident direction is set gradually from left to right
The rear fixed group D and focal power that compensation group C that zoom group B that focal power is negative, focal power are positive, focal power are negative are positive secondary
Imaging group E composition, preceding fixed group are positive meniscus lens A, and zoom group is double-concave negative lens B, and compensation group is biconvex lens C, rear solid
Fixed group is diverging meniscus lens D, and secondary imaging group includes the biconvex positive lens E1, double-concave negative lens E2, biconvex that set gradually just saturating
Mirror E3, the airspace before described between fixed group A and zoom group B is 20.02~57.7mm, the zoom group B and compensation group C
Between airspace be 100.03~24.22mm, the airspace between the compensation group C and rear fixed group D is 6.15~
44.28mm, the airspace between biconvex positive lens E1 and double-concave negative lens E2 are 7.32mm, and double-concave negative lens E2 and biconvex are just
Airspace between lens E3 is 1.3mm, double-concave negative lens B rear end face, diverging meniscus lens D rear end face, biconvex positive lens E1
Rear end face and biconvex positive lens E3 front end face are aspherical.
2. big zoom ratio medium wave infrared continuous zoom lens according to claim 1, it is characterised in that: the optical system
It is respectively silicon, germanium, silicon, germanium, silicon, germanium, silicon that each lens materials, which are pressed along light incident direction sequence,.
3. big zoom ratio medium wave infrared continuous zoom lens according to claim 1, it is characterised in that: described aspherical full
Foot column expression formula:
Wherein, Z be it is aspherical along optical axis direction when being highly the position of r, away from aspheric vertex of surface apart from rise；C=1/R, R
Indicate the paraxial curvature radius of mirror surface；K is circular cone coefficient；A, B, C, D are high order aspheric surface coefficient.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710547355.6A CN107193116B (en) | 2017-07-06 | 2017-07-06 | Big zoom ratio medium wave infrared continuous zoom lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710547355.6A CN107193116B (en) | 2017-07-06 | 2017-07-06 | Big zoom ratio medium wave infrared continuous zoom lens |
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| CN107193116A CN107193116A (en) | 2017-09-22 |
| CN107193116B true CN107193116B (en) | 2019-07-26 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169880A (en) * | 2017-12-08 | 2018-06-15 | 北京航天计量测试技术研究所 | A kind of compact continuous vari-focus infrared optical system |
| CN107991763B (en) * | 2018-01-16 | 2020-08-11 | 山东神戎电子股份有限公司 | High-definition long-focus long-wave infrared lens |
| CN110412756A (en) * | 2019-08-13 | 2019-11-05 | 福建福光天瞳光学有限公司 | Non-refrigeration type long-wave infrared continuous zoom lens and adjusting method |
| CN114924392B (en) * | 2022-04-29 | 2023-08-11 | 福建福光股份有限公司 | Medium wave refrigeration double-view-field infrared lens |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590990A (en) * | 2012-03-30 | 2012-07-18 | 昆明物理研究所 | Three-component medium wave infrared 30x continuous zooming optical system |
| CN102590991A (en) * | 2012-04-01 | 2012-07-18 | 昆明物理研究所 | U-shaped folded medium wave infrared 30-times continuous zooming optical system |
| CN102866485A (en) * | 2012-09-06 | 2013-01-09 | 中国电子科技集团公司第十一研究所 | Long-wavelength infrared continuous zoom lens |
-
2017
- 2017-07-06 CN CN201710547355.6A patent/CN107193116B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590990A (en) * | 2012-03-30 | 2012-07-18 | 昆明物理研究所 | Three-component medium wave infrared 30x continuous zooming optical system |
| CN102590991A (en) * | 2012-04-01 | 2012-07-18 | 昆明物理研究所 | U-shaped folded medium wave infrared 30-times continuous zooming optical system |
| CN102866485A (en) * | 2012-09-06 | 2013-01-09 | 中国电子科技集团公司第十一研究所 | Long-wavelength infrared continuous zoom lens |
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