CN108761748A - A kind of medium wave refrigeration infrared continuous zoom lens - Google Patents
A kind of medium wave refrigeration infrared continuous zoom lens Download PDFInfo
- Publication number
- CN108761748A CN108761748A CN201810911699.5A CN201810911699A CN108761748A CN 108761748 A CN108761748 A CN 108761748A CN 201810911699 A CN201810911699 A CN 201810911699A CN 108761748 A CN108761748 A CN 108761748A
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- lens
- group
- zoom
- medium wave
- optical axis
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 230000000694 effects Effects 0.000 claims abstract description 7
- 229910052732 germanium Inorganic materials 0.000 claims description 20
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 20
- 238000009738 saturating Methods 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 230000005499 meniscus Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 239000002210 silicon-based material Substances 0.000 claims description 2
- 230000004075 alteration Effects 0.000 abstract description 5
- 238000003384 imaging method Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
Abstract
The invention discloses a kind of medium wave refrigeration infrared continuous zoom lens, including 5 groups of 7 lens, fixed group, compensation group, zoom group, rear fixed group and image rotation group before being followed successively by from the object side to image side along optical axis；Wherein, fixed group is fixed first lens before described, compensation group is made of the second lens, second lens are moved along optical axis to be moved to compensate image planes, zoom group, that is, the third lens move realization zoom along optical axis, and rear fixed group is made of the 4th lens with the 5th lens, and rear fixed group is fixed, image rotation group is made of the 6th lens with the 7th lens, and image rotation group realizes image rotation and the matched effect of diaphragm.The present invention realizes 10 times or more of high power than continuous vari-focus, and the aspherical usage quantity of simultaneity factor is few, greatly reduces camera lens cost, uses the aberration that diffraction surfaces correct system, obtains preferable image quality.
Description
Technical field
The present invention relates to a kind of continuous magnification lens, specially a kind of medium wave refrigeration infrared continuous zoom lens.
Background technology
Refrigeration mode thermal imaging since its F number can reach 4.0 or more, can in the case that bore it is limited realize it is longer
Focal length, operating distance is farther relative to uncooled IRFPAs, therefore is widely used in military remote monitor environment.
LONG WAVE INFRARED zoom lens disclosed in the prior art is more or entire length is longer using number of lenses, therefore
Cause camera lens heaviness, the low influence imaging effect of transmitance.A kind of high transmittance medium wave of Patent No. 201620925357.5
Infrared zooming lens, although having only used 6 eyeglasses, camera lens entire length is more than that 300mm camera lenses are longer.And Patent No.
Although 201420348205.4 a kind of big zoom ratio medium wave infrared continuous zoom lens entire length there was only 160mm, make
With 8 lens, reduce transmitance and affect image quality, at the same used 5 it is aspherical, increase the cost of camera lens.
Therefore, the technical problem to be solved in the present invention is to provide a kind of continuous magnification lens compact-sized, transmitance is high.
Invention content
The present invention provides a kind of medium wave refrigeration infrared continuous zoom lens, the zoom aiming at above-mentioned defect
Camera lens has the technological merit compact-sized, transmitance is high, has reached 10 times or more continuous vari-focus using 5 groups of 7 lens.
A kind of medium wave refrigeration infrared continuous zoom lens technical solution of the present invention is, including 5 groups of 7 lens, along optical axis
Fixed group, compensation group, zoom group, rear fixed group and image rotation group before being followed successively by from the object side to image side；Wherein, the preceding fixed group is
Fixed first lens, compensation group are made of the second lens, and the second lens are moved along optical axis to be moved to compensate image planes, zoom
Group is that the third lens move realization zoom along optical axis, and rear fixed group is made of the 4th lens with the 5th lens, and rear fixed group is fixed
Motionless, image rotation group is made of the 6th lens with the 7th lens, and image rotation group realizes image rotation and the matched effect of diaphragm.
Preceding fixed group focal power is that just, compensation group focal power is that just, zoom group focal power is negative, and rear fixed group focal power is
Just.
First lens be all made of with the 4th lens rear surface it is aspherical, and on the basis of aspherical use diffraction surfaces.
First lens use silicon materials, rest of the lens to be all made of germanium material.
First lens are falcate silicon positive lens of a piece of convex surface to object side；Second lens are a piece of convex surfaces to the curved of object side
Month shape germanium positive lens；The third lens are a piece of two-sided germanium negative lenses for concave surface；4th lens are a piece of biconvex germanium positive lens, the
Five lens are falcate germanium positive lens of a piece of convex surface to object side；6th lens are that a piece of convex surface is negative saturating to the falcate germanium of image side
Mirror, the 7th lens are falcate germanium positive lens of a piece of convex surface to image side.
Camera lens from wide-angle state to look in the distance state when, the second positive meniscus lens first moves back towards the first lens along optical axis
It is moved from the first lens, the third lens are moved along optical axis away from the first lens.
Remain that F numbers are 4 in zooming procedure.
Continuous vari-focus multiple is more than 10 times, and can coordinate 640 × 512 resolution ratio, and Pixel size is that 15 μm of medium waves freeze
Detector uses.
Beneficial effects of the present invention are：As a result of the movement of optical texture and compensation group c-type just, positive and negative, positive
Mode so that the present invention can reach 10 times or more of zoom ratio using less eyeglass, and ensure that structure
It is compact.As a result of less lens numbers, transmitance is improved so that the lens imaging effect in the present invention is good, is easy to
Adjustment and assembling.Meanwhile the present invention is only with 2 faces are aspherical and diffraction surfaces reduce the cost of camera lens.
Description of the drawings：
Fig. 1 is the lens-section figure of the present invention；
Fig. 2 be the present invention infrared continuous zoom lens wide-angle state, middle coke-like state and look in the distance state when zoom mistake
Journey schematic diagram；
Fig. 3 is wide-angle state modulated transmission function figure of the present invention；
Fig. 4 is focal length state modulated transmission function figure of the present invention；
In figure, group is fixed before 1-, 2- compensation groups, 3- zoom groups fix group, 5- image rotation groups, the first lens of 11-, 21- after 4-
Second lens, 31- the third lens, the 4th lens of 41-, the 5th lens of 42-, the 6th lens of 51-, the 7th lens of 52-.
Specific implementation mode：
For a better understanding of the present invention, below with specific example come the technical solution that the present invention will be described in detail, but this
Invention is not limited thereto.
Embodiment 1
As shown in Figure 1, the present invention provides a kind of medium wave refrigeration infrared continuous zoom lens, including 5 groups of 7 lens, edge
Optical axis fixed group 1, compensation group 2, zoom group 3, rear fixed group 4 and image rotation group 5 before being followed successively by from the object side to image side；Wherein, described
Preceding fixed group 1 is fixed first lens 11, and compensation group 2 is made of the second lens 21, and the second lens 21 are moved along optical axis
Compensate image planes movement, zoom group 3 is that the third lens 31 move realization zoom along optical axis, rear fixed group 4 by the 4th lens 41 with
5th lens 42 form, and rear fixed group 4 is fixed, and image rotation group 5 is made of the 6th lens 51 with the 7th lens 52, image rotation group 5
Realize image rotation and the matched effect of diaphragm.
Embodiment 2
As shown in Figure 1 and Figure 2, the present invention provides a kind of medium wave refrigeration infrared continuous zoom lens, including 5 groups 7 saturating
Mirror, fixed group 1, compensation group 2, zoom group 3, rear fixed group 4 and image rotation group 5 before being followed successively by from the object side to image side along optical axis；Wherein,
Fixed group 1 is fixed first lens 11 before described, and compensation group 2 is made of the second lens 21, and the second lens 21 are along optical axis
Mobile to be moved to compensate image planes, zoom group 3 is that the third lens 31 move realization zoom along optical axis, and rear fixed group 4 is by the 4th lens
41 and the 5th lens 42 form, rear fixed group 4 is fixed, and image rotation group 5 is made of the 6th lens 51 with the 7th lens 52, image rotation
Group 5 realizes image rotation and the matched effect of diaphragm.
First lens 11 are a piece of bent moon silicon positive lens convex surface facing object side, and the second lens 21 are a piece of convex surface to object side
Falcate germanium positive lens, the third lens 31 be it is a piece of it is two-sided be concave surface germanium negative lens, the 4th lens 41 be a piece of biconvex germanium
Positive lens, the 5th lens 42 are falcate germanium positive lens of a piece of convex surface to object side, and the 6th lens 51 are a piece of convex surface to image side
Falcate germanium negative lens, the 7th lens 52 be falcate germanium positive lens of a piece of convex surface to image side.
Preceding fixed group 1, compensation group 2, zoom group 3 and rear fixed group 4, focal power be respectively just, it is positive and negative, just.Work as camera lens
Group location status from wide-angle state to look in the distance state change when, compensation group 2 be the second lens 21 along optical axis first towards first thoroughly
Mirror 11 moves back and is moved from the first lens 11, and zoom group 3 is that the third lens 31 are moved along optical axis away from the first lens 11.It is above-mentioned
Focal power combination and motion mode make lens group realize 10 times or more of optical zoom.
Image rotation group 5 includes the 6th lens 51 and the 7th lens 52,100% cold stop efficiency may be implemented, while can lead to
The mode of image rotation is crossed to reduce the size of telephoto lens front lens.
In the present embodiment, the F numbers of camera lens are fixed as 4 always, can coordinate 640 × 512 resolution ratio, Pixel size 15
μm medium wave refrigeration detector uses.
Embodiment 3
In the present embodiment, using medium wave as claimed in claim 2 refrigeration infrared continuous zoom lens, the first lens 11
It is aspherical away from the selection of the surface of object plane away from the surface of object plane and the 4th lens 41, and diffraction is used on the basis of aspherical
Face.The characteristics of non-spherical lens is：It is consecutive variations from lens centre to periphery curvature.And have one from lens centre to periphery
The spherical lens for determining curvature is different, and non-spherical lens has more preferably radius of curvature characteristic, and having improves the excellent of the aberrations such as spherical aberration
Point enables to the visual field to become much larger and true.After non-spherical lens, it can eliminate and go out when imaging as much as possible
Existing aberration, so as to improve image quality.
Usual aspherical shape expression formula is：
Z represents the position of optical axis direction, and r represents the height in the vertical direction of opposite optical axis, and c represents radius of curvature, k generations
Table circular cone coefficient, α4、α6、α8... represent asphericity coefficient.
In aspherical shape data, E-n represents " × 10-n", such as 2.01E-06 represents 2.01 × 10-6。
In the present embodiment, the use of diffraction surfaces can change the focal position of different-waveband light, can correct focal length
The aberration of system, so as to improve image quality.
Diffraction surfaces expression formula is：
Φ=A1ρ2+A2ρ2
Wherein Φ is the position phase of diffraction surfaces, ρ=r/rn, rnIt is the planning radius of diffraction surfaces, A1、A2For the position phase of diffraction surfaces
Coefficient.
The present invention is described in more detail referring to following table.
The zoom ratio of camera lens in this programme is 10.6 times, longest focal length 320mm, shortest focal length 30mm.
Wherein, table one is the optical component parameter table of the present embodiment.
D1 is the spacing of the first lens 11 and the second lens 21 in table one, and D2 is between the second lens 21 and the third lens 31
Away from D3 is the spacing of the third lens 31 and the 4th lens 41.Table one：Optical component parameter table
Table two：The relationship of zoom position and lens group spacing
Table three：Asphericity coefficient
| k | α4 | α6 | α8 | |
| Aspherical 1 | 0.0572 | 1.86E-009 | 2.30E-14 | -1.22E-17 |
| Aspherical 2 | -4.35269 | 2.18E-007 | 2.37E-10 | 3.92E-13 |
Table four：Diffraction surfaces coefficient
| A1 | A2 | |
| Aspherical 1 | 32.155978 | 0.298415 |
| Aspherical 2 | -40.490544 | -6.290909 |
Fig. 3 and Fig. 4 be wide-angle state of the present invention and look in the distance state when modulation transfer function figure, and its horizontal axis be per in the least
The demand pairs (line pair per millimeter) of rice, the longitudinal axis are contrast numerical value.
From in figure we it can be found that either wide-angle state still this system under the state of looking in the distance can obtain compared with
The image of high-quality, medium wave refrigeration infrared continuous zoom lens of the present invention have preferable optical effect.
Claims (8)
- The infrared continuous zoom lens 1. a kind of medium wave freezes, which is characterized in that include 5 groups of 7 lens, along optical axis from object side to picture Side fixed group, compensation group, zoom group, rear fixed group and image rotation group before being followed successively by；Wherein, the preceding fixed group is fixed First lens, compensation group are made of the second lens, and the second lens are moved along optical axis to be moved to compensate image planes, and zoom group, that is, third is saturating Mirror moves realization zoom along optical axis, and rear fixed group is made of the 4th lens with the 5th lens, fixed, the image rotation group of rear fixed group It is made of with the 7th lens the 6th lens, image rotation group realizes image rotation and the matched effect of diaphragm.
- The infrared continuous zoom lens 2. a kind of medium wave according to claim 1 freezes, which is characterized in that preceding fixed group light focus Degree is just, compensation group focal power is that just, zoom group focal power is negative, and rear fixed group focal power is just.
- The infrared continuous zoom lens 3. a kind of medium wave according to claim 1 freezes, which is characterized in that the first lens and the Four lens rear surfaces be all made of it is aspherical, and on the basis of aspherical use diffraction surfaces.
- The infrared continuous zoom lens 4. a kind of medium wave according to claim 1 freezes, which is characterized in that first lens Using silicon materials, rest of the lens are all made of germanium material.
- The infrared continuous zoom lens 5. a kind of medium wave according to claim 1 freezes, which is characterized in that the first lens are one Falcate silicon positive lens of the piece convex surface to object side；Second lens are falcate germanium positive lens of a piece of convex surface to object side；Third is saturating Mirror is a piece of two-sided germanium negative lens for concave surface；4th lens be a piece of biconvex germanium positive lens, the 5th lens be a piece of convex surface to The falcate germanium positive lens of object side；6th lens are falcate germanium negative lens of a piece of convex surface to image side, and the 7th lens are a piece of Falcate germanium positive lens of the convex surface to image side.
- The infrared continuous zoom lens 6. a kind of medium wave according to claim 1 freezes, which is characterized in that camera lens is from wide-angle shape State to look in the distance state when, the second positive meniscus lens first moves back and is moved from the first lens along optical axis towards the first lens, third Lens are moved along optical axis away from the first lens.
- The infrared continuous zoom lens 7. a kind of medium wave according to claim 6 freezes, which is characterized in that begin in zooming procedure It is 4 to keep F numbers eventually.
- The infrared continuous zoom lens 8. a kind of medium wave according to claim 1 freezes, which is characterized in that continuous vari-focus multiple More than 10 times, and 640 × 512 resolution ratio can be coordinated, Pixel size is that 15 μm of medium wave refrigeration detectors use.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810911699.5A CN108761748A (en) | 2018-08-10 | 2018-08-10 | A kind of medium wave refrigeration infrared continuous zoom lens |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810911699.5A CN108761748A (en) | 2018-08-10 | 2018-08-10 | A kind of medium wave refrigeration infrared continuous zoom lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485897A (en) * | 2020-12-25 | 2021-03-12 | 长春理工大学 | Refrigeration type medium wave infrared stepping zoom lens |
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|---|---|---|---|---|
| JPH05273466A (en) * | 1992-03-26 | 1993-10-22 | Canon Inc | Zoom lens of rear focusing system |
| JPH06250086A (en) * | 1993-02-24 | 1994-09-09 | Canon Inc | Zoom lens |
| US20030227693A1 (en) * | 2002-06-07 | 2003-12-11 | Ryoko Otomo | Projection optical system and projection exposure device which uses same |
| CN102213822A (en) * | 2011-07-12 | 2011-10-12 | 中国电子科技集团公司第十一研究所 | Medium wave infrared continuous zoom lens |
| 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 |
| CN103823294A (en) * | 2014-02-24 | 2014-05-28 | 湖北久之洋红外系统股份有限公司 | Continuous zooming medium wave infrared optics system with super-long focal length |
| CN205809399U (en) * | 2016-06-01 | 2016-12-14 | 北京蓝思泰克科技有限公司 | A kind of long-focus cut-in type medium wave refrigeration mode double-view field infrared optical lens |
| CN107065154A (en) * | 2017-06-08 | 2017-08-18 | 西安中科飞图光电科技有限公司 | Compact continuous zooming optical system |
| CN107991763A (en) * | 2018-01-16 | 2018-05-04 | 山东神戎电子股份有限公司 | A kind of high definition long-focus LONG WAVE INFRARED camera lens |
| CN208672900U (en) * | 2018-08-10 | 2019-03-29 | 济南和普威视光电技术有限公司 | A kind of medium wave refrigeration infrared continuous zoom lens |
-
2018
- 2018-08-10 CN CN201810911699.5A patent/CN108761748A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05273466A (en) * | 1992-03-26 | 1993-10-22 | Canon Inc | Zoom lens of rear focusing system |
| JPH06250086A (en) * | 1993-02-24 | 1994-09-09 | Canon Inc | Zoom lens |
| US20030227693A1 (en) * | 2002-06-07 | 2003-12-11 | Ryoko Otomo | Projection optical system and projection exposure device which uses same |
| CN102213822A (en) * | 2011-07-12 | 2011-10-12 | 中国电子科技集团公司第十一研究所 | Medium wave infrared continuous zoom lens |
| 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 |
| CN103823294A (en) * | 2014-02-24 | 2014-05-28 | 湖北久之洋红外系统股份有限公司 | Continuous zooming medium wave infrared optics system with super-long focal length |
| CN205809399U (en) * | 2016-06-01 | 2016-12-14 | 北京蓝思泰克科技有限公司 | A kind of long-focus cut-in type medium wave refrigeration mode double-view field infrared optical lens |
| CN107065154A (en) * | 2017-06-08 | 2017-08-18 | 西安中科飞图光电科技有限公司 | Compact continuous zooming optical system |
| CN107991763A (en) * | 2018-01-16 | 2018-05-04 | 山东神戎电子股份有限公司 | A kind of high definition long-focus LONG WAVE INFRARED camera lens |
| CN208672900U (en) * | 2018-08-10 | 2019-03-29 | 济南和普威视光电技术有限公司 | A kind of medium wave refrigeration infrared continuous zoom lens |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485897A (en) * | 2020-12-25 | 2021-03-12 | 长春理工大学 | Refrigeration type medium wave infrared stepping zoom lens |
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