CN107976791A - A kind of super large multiplying power continuous zooming uncooled ir camera lens - Google Patents
A kind of super large multiplying power continuous zooming uncooled ir camera lens Download PDFInfo
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- CN107976791A CN107976791A CN201711158574.1A CN201711158574A CN107976791A CN 107976791 A CN107976791 A CN 107976791A CN 201711158574 A CN201711158574 A CN 201711158574A CN 107976791 A CN107976791 A CN 107976791A
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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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/16—Optical objectives specially designed for the purposes specified below for use in conjunction with image converters or intensifiers, or for use with projectors, e.g. objectives for projection TV
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The invention discloses a kind of super large multiplying power continuous zooming uncooled ir camera lens, including continuous zooming optical system and drag reduction structures component；The continuous zooming optical system includes preceding fixed lens, zoom lens, two panels offset lens, rear fixed lens and focusing lens；The drag reduction structures component includes fixed body tube, zoom lens seat, offset lens seat, focusing lens seat, zoom cam and focusing cam are respectively arranged with outside the fixation body tube and focusing lens seat, motor is moved by zoom canine tooth wheel drive zoom cam driven zoom lens and offset lens, and by focusing, pinion gear drives focusing cam to drive focusing lens to move；The present invention can reach farther operating distance and more preferably image effect；A variety of infrared optical materials are subjected to reasonably combined, optimization design focusing lens, defocus caused by variation of ambient temperature can be adequately compensated for, focus effect before optimization than being obviously improved.
Description
Technical field
The invention belongs to infrared lens technical field, and in particular to a kind of super large multiplying power continuous zooming uncooled ir mirror
Head.
Background technology
Uncooled ir product is obtaining very extensive application now, due to round-the-clock observing capacity round the clock, greatly
The numerous areas such as amount be used to monitoring, guard against, monitors, scout, forest fire protection.Compared to refrigeration infrared product, uncooled ir heat
As instrument need not freeze detector, device cost greatly reduces, and the available machine time greatly shortens, easy-to-use, is applicable in model
Enclose wider.
Continuous vari-focus uncooled ir camera lens, is the important component of thermal infrared imager, due to can be all clear to far and near target
Clear imaging, provides most appropriate picture and visual field for user, is more and more applied in uncooled ir product.
Continuous vari-focus uncooled ir camera lens through publishing at present, although having the function of continuous vari-focus, is deposited mostly
In following defect：1）Zoom ratio is less than normal.Domestic infrared industry, uncooled ir optical articles do not have zoom ratio to reach at present
10 times of product, is mostly 3 times or 5 times, to reach 10 times of super large multiplying powers, and main difficult point is that the image quality of optical system is excellent
Change, cost control, appearance and size.2）Optical system picture element is bad.Continuous zooming optical system is since movement microscope group is more, to optics
Design, microscope group machining accuracy and the requirement of adjustment precision are very high, and common continuous zooming optical camera lens, is limited by infra-red material with setting
The restriction of meter means, it is difficult to realize optimal imaging effect.3）Zoom motion mechanical stability and reliability are bad.It is common continuous
Zoom infrared lens, due to zoom motion, mechanism is huge, and fit precision is not good enough, and the resistance of motion is big, the optical axis in zooming procedure
Stability and dependability is bad.
The content of the invention
The present invention is for insufficient existing for existing continuous vari-focus uncooled ir camera lens, there is provided one kind has super large multiplying power
With the continuous vari-focus infrared lens of special drag reduction structures, the optical property of infrared lens can be obviously improved, is had preferably suitable
Ying Xingyu practicality.
The technical solution adopted by the present invention to solve the technical problems is：A kind of super large multiplying power continuous zooming uncooled ir
Camera lens, including super large multiplying power continuous zooming optical system and drag reduction structures component；The continuous zooming optical system includes edge
Preceding fixed lens, zoom lens, two panels offset lens, rear fixed lens and the focusing that optical axis is set gradually from the object side to the image side are saturating
Mirror；The drag reduction structures component includes the fixation body tube being arranged on base, the change being successively set in fixed body tube
Focus lens seat and offset lens seat and the focusing lens seat for being arranged on fixed body tube rear, the preceding fixed lens pass through
Lens spacer ring is fixed on fixed body tube front end, and lens trim ring, preceding fixed lens and fixed primary mirror are additionally provided with outside lens spacer ring
O-ring is additionally provided between cylinder, the zoom lens and offset lens are separately mounted to zoom lens seat and offset lens seat
On, the focusing lens is installed on focusing lens seat, and the rear fixed lens are installed on fixed body tube and focusing is saturating
Between microscope base；Zoom cam and focusing cam are respectively arranged with outside the fixation body tube and focusing lens seat, is gone back on base
Motor is provided with, zoom gear wheel and focusing pinion gear are connected on the output shaft of motor, motor passes through zoom gear wheel
Zoom cam driven zoom lens and offset lens movement are driven, complete optical system zoom, pinion gear driving is adjusted by focusing
Burnt cam driven focusing lens movement, completes optical system focusing；The front end face of the zoom cam is provided with wedge groove, described
Wedge groove in be filled with ball；The preceding fixed lens are the positive diopter meniscus convex surface facing object space；Zoom is saturating
Mirror is the biconcave lens of negative diopter；Two panels offset lens is respectively concave surface towards the positive diopter concave-convex lens of object space and convex surface
Towards the negative diopter concave-convex lens of image space；It is the negative diopter concave-convex lens convex surface facing image space to fix lens afterwards；Focusing is saturating
Mirror is the positive diopter concave-convex lens convex surface facing object space.
Pushing rod sleeve is provided between the zoom lens seat and fixed body tube, push rod is provided with pushing rod sleeve.
It is provided with to repair between the rear end face and focusing lens seat of the zoom cam and cuts circle, after the fixation body tube
Packing ring is provided between end face and focusing lens seat.
The relative aperture of the continuous zooming optical system is 1：1.2, optical focal length 20-200mm.
The preceding fixed lens use single crystal germanium material, and the zoom lens use single crystal germanium material, and described two
Single crystal germanium material and selenizing Zinc material is respectively adopted in piece offset lens, and the rear fixed lens use single crystal germanium material, described
Focusing lens use single crystal germanium material.
The zoom lens are non-spherical lens, and described second offset lens is non-spherical lens, the tune
Focus lens lens are aspherical diffractive face lens.
The beneficial effects of the invention are as follows：How aspherical the present invention is continuous using the super large multiplying power of negative group zoom, positive group compensation
Varifocal optical system, relative aperture 1：1.2, farther operating distance and more preferably image effect can be reached；Optimization design
Focusing lens, group lens carry out focusing compensation after, can adequately compensate for defocus caused by variation of ambient temperature, focus effect
Than being obviously improved before optimization；Optic-mechanical design uses integrated design thinking, and optical design uses diaphragm aberration optimum design method,
The outside diameter and stroke of zoom microscope group are at utmost compressed, and structure ensure that then using double flute zoom cam+ball drag reduction design
The precision and reliability of motion；The present invention is reasonably combined by the progress of a variety of infrared optical materials, fully eliminates system aberration,
Achieve excellent image quality.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is optical system 200mm focal length end of the present invention schematic diagram；
Fig. 3 is optical system 20mm short focus end of the present invention schematic diagram；
Fig. 4 is optical system zoom microscope group of the present invention and compensation microscope group movement profiles, and series 1 is zoom lens curve movement,
Series 2 is offset lens curve movement.
Each reference numeral is：1-lens cap, 2-preceding fixed lens, 3-lens trim ring, 4-lens spacer ring, 5-O-shaped
Circle, 6-zoom lens, 7-ball, 8-push rod, 9-pushing rod sleeve, 10-zoom cam, 11-zoom gear wheel, 12-compensation
Lens, 13-body tube, 14-repair and cut circle, 15-packing ring, 16-lens, 17-focusing lens, 18-zoom lens are fixed afterwards
Seat, 19-offset lens seat, 20-focusing lens seat, 21-focusing cam, 22-motor, 23-base, the small tooth of 24-focusing
Wheel.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
The present invention provides a kind of large-multiplying power continuous zooming uncooled ir camera lens, as shown in Figure 1, continuously becoming including big multiplying power
Focus optical system and special drag reduction structures component.The relative aperture of continuous zooming optical system is equal to 1：1.2, optical focal length is
20-200mm, i.e. optical system are 10 times of continuous vari-focus systems, and focal length end focal length is 200mm, and short focus end focal length is 20mm, optics
System can be imaged in 20mm~200mm focal ranges with high-resolution.The continuous zooming optical system is included along optical axis
The optical lens set gradually from the object side to the image side, including it is preceding fixed lens 2, zoom lens 6, two panels offset lens 12, rear solid
Fix-focus lens 16 and focusing lens 17；In one embodiment of the present of invention, in order to realize optimal image quality, set in optical system
Multiple non-spherical lenses are put, such as zoom lens 6, offset lens 12 and focusing lens 17, so as to eliminate big multiplying power zoom
In system aberration, while optical length and camera lens volume can be reduced.
The drag reduction structures component includes being arranged on fixing the fixation body tube 13 of optical lens on base 23, setting successively
Put the zoom lens seat 18 and offset lens seat 19 and the tune for being arranged on fixed 13 rear of body tube in fixed body tube 13
Focus lens seat 20, fixed body tube 13 are additionally provided with lens cap 1 outside, and the preceding fixed lens 2 are fixed on by lens spacer ring 4
Fixed 13 front end of body tube, lens spacer ring 4 are additionally provided with lens trim ring 3 outside, between preceding fixed lens 2 and fixed body tube 13 also
O-ring 5 is provided with, the zoom lens 6 and offset lens 12 are separately mounted to zoom lens seat 18 and offset lens seat 19
On, the focusing lens 17 is installed on focusing lens seat 20, and the rear fixed lens 16 are installed on fixed body tube 13
Between focusing lens seat 20, zoom cam 10 is respectively arranged with outside the fixation body tube 13 and focusing lens seat 20 and is adjusted
Burnt cam 21, is additionally provided with motor 22 on base 23, and zoom gear wheel 11 and focusing are connected on the output shaft of motor 22
Pinion gear 24, motor 22 drives zoom cam 10 to drive zoom lens 6 and offset lens 12 to move by zoom gear wheel 11, complete
Into optical system zoom, by focusing, pinion gear 24 drives focusing cam 21 to drive focusing lens 17 to move, and completes optical system
Focusing, wherein zoom cam 10 use double-slot cam form with focusing cam 21, i.e. cam is designed with the song of two Parallel Symmetrics
Wire casing, it is common to promote zoom group movement, the optical axis stable and reliability of moving parts can be improved.
Further, the front end face of the zoom cam 10 is provided with wedge groove, and ball 7 is filled with the wedge groove,
Steel column 7 is located between zoom cam 10 and fixed body tube 13, and the sliding friction of zoom mechanism can be converted into rolling and rubbed by ball 7
Wipe, for reducing frictional resistance of the motion in zoom motion.
Further, pushing rod sleeve 9 is provided between the zoom lens seat 18 and fixed body tube 13, is set in pushing rod sleeve 9
Push rod 8 is equipped with, down promotes push rod 8 during push rod 8 to fall into the spacing groove/opening of zoom lens seat 18, to completing optical system
The zoom lens 6 for becoming defocused are locked.
Further, it is provided with to repair between the rear end face and focusing lens seat 20 of the zoom cam 10 and cuts circle 14, passes through
Cut circle 14 to repairing and carry out manual trial assembly repeatedly examination and survey to find fixed optical lens position, 13 rear end face of fixation body tube
Packing ring 15 is provided between focusing lens seat 20, for improving both leakproofness.
As the preferred embodiment of the present invention, following table lists the specific ginseng of continuous zooming optical system in the present invention
Number.
Radius of curvature in upper table refers to the radius of curvature on each surface, and spacing refers to the distance between adjacent two surface,
For example, the spacing of surface S1, i.e. surface S1 are to the distance between the S2 of surface.Glass material is used in the making processing of the lens
Material.
Under list surface S4, surface S8, the asphericity coefficient of surface S11.
The position of the aspherical optical axis direction on the basis of vertex of surface, which becomes, to be defined as follows：
Wherein, each meaning of parameters is as follows：
The position of Z-optical axis direction becomes；The height of H-optical axis；C-lens curvature；K-quadratic surface coefficient；A, B, C-aspherical system
Number.
Following table is the diffraction surfaces coefficient of surface S11.
Wherein, each meaning of parameters is as follows：
C1：Diffraction coefficient of first order
C2：Diffraction second order coefficient.
The present invention uses super large multiplying power continuous zooming optical system technology, using negative group of zoom, more aspheric of positive group compensation
The high image quality optical system in face, relative aperture 1：1.2, farther operating distance and more preferably image effect can be reached；To be more
Kind infrared optical material progress is reasonably combined, fully eliminates system aberration, achieves excellent image quality；Optimization design is focused
Lens, group lens carry out focusing compensation after, can adequately compensate for defocus caused by variation of ambient temperature, focus effect is than excellent
It is obviously improved before change.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (6)
- A kind of 1. super large multiplying power continuous zooming uncooled ir camera lens, it is characterised in that：Including super large multiplying power continuous zooming optics System and drag reduction structures component；The continuous zooming optical system includes the preceding fixed lens set gradually from the object side to the image side along optical axis（2）, zoom Lens（6）, two panels offset lens（12）, afterwards fix lens（16）And focusing lens（17）；The drag reduction structures component includes being arranged on base（23）On fixation body tube（13）, be successively set on fixed primary mirror Cylinder（13）Interior zoom lens seat（18）With offset lens seat（19）And it is arranged on fixed body tube（13）The focusing at rear is saturating Microscope base（20）, the preceding fixed lens（2）Pass through lens spacer ring（4）It is fixed on fixed body tube（13）Front end, lens spacer ring （4）It is additionally provided with lens trim ring outside（3）, preceding fixed lens（2）With fixed body tube（13）Between be additionally provided with O-ring（5）, institute The zoom lens stated（6）And offset lens（12）It is separately mounted to zoom lens seat（18）With offset lens seat（19）On, it is described Focusing lens（17）Installed in focusing lens seat（20）On, the rear fixed lens（16）Installed in fixed body tube（13） With focusing lens seat（20）Between；The fixation body tube（13）With focusing lens seat（20）It is respectively arranged with zoom cam outside（10）And focusing cam （21）, base（23）On be additionally provided with motor（22）, motor（22）Output shaft on be connected to zoom gear wheel（11）With Focusing pinion gear（24）, motor（22）Pass through zoom gear wheel（11）Drive zoom cam（10）Drive zoom lens（6）And benefit Repay lens（12）Movement, completes optical system zoom, passes through pinion gear of focusing（24）Drive focusing cam（21）Drive focusing saturating Mirror（17）Movement, completes optical system focusing；The zoom cam（10）Front end face be provided with wedge groove, is filled with ball in the wedge groove（7）；The preceding fixed lens（2）For convex surface facing the positive diopter meniscus of object space；Zoom lens（6）To bear diopter Biconcave lens；Two panels offset lens（12）Respectively concave surface is towards the positive diopter concave-convex lens of object space and convex surface facing image space Negative diopter concave-convex lens；Lens are fixed afterwards（16）For convex surface facing the negative diopter concave-convex lens of image space；Focusing lens （17）For convex surface facing the positive diopter concave-convex lens of object space.
- 2. a kind of super large multiplying power continuous zooming uncooled ir camera lens according to claim 1, it is characterised in that described Zoom lens seat（18）With fixed body tube（13）Between be provided with pushing rod sleeve（9）, pushing rod sleeve（9）Inside it is provided with push rod（8）.
- A kind of 3. super large multiplying power continuous zooming uncooled ir camera lens according to claim 1, it is characterised in that the change Burnt cam（10）Rear end face and focusing lens seat（20）Between be provided with to repair and cut circle（14）, the fixation body tube（13）Afterwards End face and focusing lens seat（20）Between be provided with packing ring（15）.
- A kind of 4. super large multiplying power continuous zooming uncooled ir camera lens according to claim 1, it is characterised in that the company The relative aperture of continuous varifocal optical system is 1：1.2, optical focal length 20-200mm.
- 5. a kind of super large multiplying power continuous zooming uncooled ir camera lens according to claim 1 or 2 or 3 or 4, its feature exist In the preceding fixed lens（2）Using single crystal germanium material, the zoom lens（6）Using single crystal germanium material, described two Piece offset lens（12）Single crystal germanium material and selenizing Zinc material, the rear fixed lens are respectively adopted（16）Using monocrystalline germanium material Material, the focusing lens（17）Using single crystal germanium material.
- 6. a kind of super large multiplying power continuous zooming uncooled ir camera lens according to claim 1 or 2 or 3 or 4, its feature exist In the zoom lens（6）For non-spherical lens, described second offset lens（12）It is described for non-spherical lens Focusing lens（17）Lens are aspherical diffractive face lens.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711158574.1A CN107976791B (en) | 2017-11-20 | 2017-11-20 | Super-large-magnification continuous zooming uncooled infrared lens |
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| CN201711158574.1A CN107976791B (en) | 2017-11-20 | 2017-11-20 | Super-large-magnification continuous zooming uncooled infrared lens |
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| CN107976791A true CN107976791A (en) | 2018-05-01 |
| CN107976791B CN107976791B (en) | 2020-02-07 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633878A (en) * | 2019-01-24 | 2019-04-16 | 福建福光天瞳光学有限公司 | A kind of lightweight continuous magnification lens design and its assembly method |
| CN110542974A (en) * | 2019-01-25 | 2019-12-06 | 广州长步道光电科技有限公司 | Realize high-accuracy zoom industrial lens structure |
| CN110595623A (en) * | 2019-08-12 | 2019-12-20 | 湖北久之洋红外系统股份有限公司 | Refrigeration type thermal infrared imager |
| CN111787203A (en) * | 2020-07-14 | 2020-10-16 | 孝感华中精密仪器有限公司 | Camera and video all-in-one machine based on image space scanning |
| CN112099182A (en) * | 2020-09-29 | 2020-12-18 | 湖北华中光电科技有限公司 | Large-view-field high-zoom-ratio continuous zoom lens based on double-group compensation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109633878A (en) * | 2019-01-24 | 2019-04-16 | 福建福光天瞳光学有限公司 | A kind of lightweight continuous magnification lens design and its assembly method |
| CN109633878B (en) * | 2019-01-24 | 2024-04-16 | 福建福光天瞳光学有限公司 | Assembling method of lightweight continuous zoom lens |
| CN110542974A (en) * | 2019-01-25 | 2019-12-06 | 广州长步道光电科技有限公司 | Realize high-accuracy zoom industrial lens structure |
| CN110595623A (en) * | 2019-08-12 | 2019-12-20 | 湖北久之洋红外系统股份有限公司 | Refrigeration type thermal infrared imager |
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| CN111787203A (en) * | 2020-07-14 | 2020-10-16 | 孝感华中精密仪器有限公司 | Camera and video all-in-one machine based on image space scanning |
| CN111787203B (en) * | 2020-07-14 | 2021-08-06 | 孝感华中精密仪器有限公司 | Camera and video all-in-one machine based on image space scanning |
| CN112099182A (en) * | 2020-09-29 | 2020-12-18 | 湖北华中光电科技有限公司 | Large-view-field high-zoom-ratio continuous zoom lens based on double-group compensation |
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Inventor after: Li Yong Inventor after: Hong Pu Inventor after: Hu Feng Inventor after: Xiong Tao Inventor after: Lei Zhixiong Inventor before: Li Yong |