CN107728284A - A kind of zoom mechanism for the switching of the visual field of infrared optical imaging system two - Google Patents
A kind of zoom mechanism for the switching of the visual field of infrared optical imaging system two Download PDFInfo
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- CN107728284A CN107728284A CN201710894813.3A CN201710894813A CN107728284A CN 107728284 A CN107728284 A CN 107728284A CN 201710894813 A CN201710894813 A CN 201710894813A CN 107728284 A CN107728284 A CN 107728284A
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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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/02—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective
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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
- G02B7/14—Mountings, adjusting means, or light-tight connections, for optical elements for lenses adapted to interchange lenses
- G02B7/16—Rotatable turrets
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Abstract
A kind of zoom mechanism for the switching of the visual field of infrared optical imaging system two, belong to two visual fields interruption zoom infrared optics imaging field；Mechanism in order to solve the visual field fast accurate of infrared optical imaging system two of electro-optic theodolite switching technical problem, motor-driven gear, drive zoom gear, so as to drive potentiometer linkage gear, the real-time detection of the rotation and multi-turn potentiometer of drive zoom lens barrel to zoom lens barrel position is realized, mechanism rapidly and accurately realizes zoom handoff functionality；Mechanism has given full play to the advantage of rotary zoom mechanism, switch speed is quickly, several times even decades of times has been higher by compared to parallel-moving type zoom mechanism efficiency, positioning precision and repetitive positioning accuracy are very high, determine that its environmental suitability is excellent by the structure of shafting and the selection of lubricating grease, by special light-weight design, volume and weight is controlled in less level, overall good stability, high comprehensive performance are also assures that simultaneously.
Description
Technical field
The present invention relates to two visual fields to be interrupted zoom infrared optics imaging field, and in particular to one kind is used for infrared optics and is imaged
The zoom mechanism of the visual field of system two switching.
Background technology
Infrared imagery technique is to utilize reflection or target background own radiation temperature of the lamp in target and background
Difference detect, identify target, in particular for the scouting under night and bad-weather condition to target, belong to passive scouting
System, therefore there is stronger disguise and antijamming capability.Infrared imaging system penetrates cigarette, mist, haze, snow etc. with certain
Limitation and the ability of identification camouflage, it will not be disturbed and blinding by the strong light in battlefield, flash of light, it is possible to achieve remote, round-the-clock sight
Examine, all had a wide range of applications in military and civilian field.
Electro-optic theodolite is using photoelectric technology, the theodolite with real-time follow-up function.Infrared optics imaging system
System is a main system of electro-optic theodolite, can be used cooperatively with visible television measurement system, in light
Real-time monitored and the tracking measurement effect to moving target are played in electro-theodolite set.Typically infrared imaging system is more
Kind of function needs to take more visual fields to realize, the designs of more visual field infrared-ray machine systems decide the effect of infrared imaging system away from
From, the key technical indexes such as appearance and size, weight, light axis consistency and reliability.Infrared imaging system passes through focusing and zooming machine
The change of focal length (visual field) is realized in the movement of structure control associated lens group, completes the handoff functionality between different visual fields.Zoom machine
The switch speed of structure determines the speed of infrared imaging system visual field switching, so as to determine the searching tracking ability of system；And
The repetitive positioning accuracy of zoom mechanism then determines the light axis consistency of infrared imaging system.
Infrared imaging system can be divided into two major classes according to the focal length value changing rule of optical system during its focusing and zooming：
One kind is continuous vari-focus (again) optical-mechanical system, by the relative motion of Zoom lens group and offset lens group to realize optical system
The consecutive variations of focal length value；Another kind of is interruption zoom (again) optical-mechanical system (suitching type zoom system, pancreatic system), that is, passes through switchable opticses
Associated lens group in system discontinuously changes the focal length value of optical system, completes the switching between different visual fields, zoom process
Middle optical system is unable to blur-free imaging.
Continuous zooming optical system continuously changes the position and interval of Zoom lens group and offset lens group, makes light
The combined focal length of system continuously changes, to obtain the change of system multiplying power, it is ensured that during zoom, system imaging is clear all the time
Clear, constant, image planes size constancy is stablized in system image planes position.Continuous vari-focus mechanism can keep clear in visual field transfer process
The continuity of image, good visual effect, the search and tracking to high-speed moving object are highly beneficial.But continuous zooming optical
The optical design of system and the structure design of zoom motion are respectively provided with larger difficulty, and the design of zoom cam is to realize optics
Design object, the final key point for realizing continuous zooming optical system.In addition, before using this zoom mechanism design
It is that optical design has carried out well-corrected to thermal aberration to carry, because mechanical cam curved groove can not change with temperature.
For being interrupted zoom (again) optical-mechanical system, axial zoom optical-mechanical system and radial direction zoom ray machine can be divided into again
System：The characteristics of axial zoom mechanism be optical axis of the Zoom lens group along optical system move realize visual field switch, its axially become
The design difficulty of times mechanism is smaller, and radial dimension is compact, is easily guaranteed that good light axis consistency, but optical design difficulty compared with
Greatly, adjustment technics comparing is complicated, adds axial dimension, and the speed of visual field switching is slower.Further, since participate in imaging
Number of lenses is more, the transmitance relative reduction of optical system；The characteristics of radial direction zoom optical-mechanical system is to cut Zoom lens group
Enter optical system.The infrared optical system of standard is the optical system of a small field of view, general in an Optical System Design
Using basis of the field optical system as product is neglected, further according to the corresponding Zoom lens group of Demand Design of product visual field, tying
A set of zoom mechanism is designed on structure, the incision of Zoom lens group is neglected in field optical system, a new infrared optics is formed and regards
.Switching mechanism has that switching time is short, equipment adjustment is simple, bulk between optical axis direction compact dimensions, lens constituent element
Greatly, the features such as transmitance is high, and because the number of lenses for participating in imaging is reduced, substantially increase the image quality of infrared system.
And the zoom mechanism of radial direction zoom optical-mechanical system includes rotary switching zoom mechanism and parallel-moving type switching becomes
Times mechanism.Rotary switching zoom mechanism has one to be rotated perpendicular to optical axis and intersecting therewith gyroaxis, gyroaxis to drive
Different lens groups cuts/light path is cut out, realize the switching (zoom) between different visual fields.Parallel-moving type switching zoom mechanism, when need
When carrying out visual field conversion, light path is cut/cut out to zoom microscope group along the translation of guide rail route, completes visual field conversion.Rotary switching
Zoom mechanism and parallel-moving type switching zoom mechanism compare, it is necessary to axially and radially space it is smaller, structure relative compact, change speed
Degree is fast.
For electro-optic theodolite, currently used is two visual fields interruption zoom optical-mechanical system, wherein big visual field is used for
Target is found in a big way, and small field of view is used for accurate tracking measurement, while also realizes and matching is imaged under different operating distances.Wherein
Interruption zoom optical-mechanical system in axial zoom optical-mechanical system and parallel-moving type switching zooming system use zoom structure realize
Principle is identical, all in the presence of one it is fatal the shortcomings that, i.e. zoom switch speed is slow, easily cause track target lose it is fatal
Problem, it is difficult to meet requirement.And faster zoom switch speed can then be reached by rotatably switching zooming system.But
The positioning precision of whole zoom switching mechanism and repetitive positioning accuracy are ensured of a urgent problem to be solved.This is due to fixed
Position precision can directly determine that zoom mechanism is carrying out the light axis consistency of two visual field handoff procedure mid-infrared light imaging systems；And
Repetitive positioning accuracy then determines the stability of zoom mechanism systematic optical axis during repeatedly switching zoom.
The content of the invention
The present invention asks to solve the technology of the visual field fast accurate of infrared optical imaging system two of electro-optic theodolite switching
A kind of topic, there is provided zoom mechanism for the switching of the visual field of infrared optical imaging system two.
Technical scheme is as follows：
It is a kind of for the visual field of infrared optical imaging system two switching zoom mechanism, including zoom base, multi-turn potentiometer,
Spring assembly, zoom rocking bar, zoom gear, zoom lens barrel, motor, mechanical position limitation, potentiometer linkage gear, motor sliding tooth
Wheel, zoom lens barrel connecting shaft and precision bearing system；
The precision bearing system is arranged on zoom base, and the zoom gear is fixed by precision bearing system and zoom rocking bar to be connected
Connect, zoom gear is fixedly connected with zoom lens barrel connecting shaft, and the zoom rocking bar is connected with spring assembly；The zoom gear point
Do not engaged with motor-driven gear and potentiometer linkage gear；The mechanical position limitation is arranged on zoom base；The motor and
Multi-turn potentiometer is fixed on zoom base；
The motor motor drive gear, drive zoom gear and potentiometer linkage gear to rotate, realize and drive change
The rotation of times lens barrel and real-time detection of the multi-turn potentiometer to zoom lens barrel position.
The spring assembly includes, spring pressuring plate, spring draw ring and spring；The spring pressuring plate is separately fixed at zoom and shaken
On bar and zoom base, spring is fixed on spring pressuring plate by spring draw ring.
The axis of the zoom rocking bar is consistent with the axis of zoom lens barrel in the range of 0 °~90 °；The position of spring
For horizontal direction 45 ° of directions counterclockwise, when the position of spring 45° angle counterclockwise more than the horizontal direction, elastic force is maximum；
In the range of 0 °~45 °, the pulling force of spring makes zoom lens barrel be maintained at 0 °, and in the range of 45 °~90 °, the pulling force of spring to become
Times lens barrel is maintained at 90 °.
Also include potentiometer briquetting, the multi-turn potentiometer by potentiometer briquetting be arranged on zoom chassis outer side and with electricity
Position meter linkage gear position correspondence, the potentiometer linkage gear are fixed on the potentiometric axle of multi-turn, realize multi-turn potentiometer
Real-time detection to zoom lens barrel position, constitutes closed control loop.
The groove side at the zoom lens barrel both ends passes through screw fixed weight block respectively.
The precision bearing system is used using the pairing of high-precision P4 levels angular contact ball bearing, while uses back-to-back installation side
Formula, isolated by outer shroud, the mode that inner ring compresses carries out pretension.
Beneficial effects of the present invention：
1st, the present invention has given full play to the advantage of rotary zoom mechanism, and switch speed quickly, can be completed to become in 2s
Act again.This is due to that rotary zoom mechanism only needs to turn over 90 ° of strokes and can complete switching action, is become compared to parallel-moving type
Times mechanism, efficiency have been higher by several times even decades of times.
2nd, positioning precision and repetitive positioning accuracy of the invention are very high.This mainly has benefited from the design and machine of high-precision shafting
The spacing accurate repair of tool is ground.Shafting passes through special design so that its circular runout has been controlled within 0.01mm, and this is whole
Individual zoom mechanism has very high-precision basis.And the positioning precision of the present invention is to grind guarantee by the accurate repair of mechanical position limitation
, it is possible to achieve the optical axis variable quantity of whole infrared optical imaging system is at all directions (X to and Y-direction) in zoom handoff procedure
Respectively less than 0.015mm (pixel dimension).The repetitive positioning accuracy of the present invention is total to by the structure and material of mechanical position limitation
With what is ensured, this causes mechanical position limitation to have good rigidity and stability.
3rd, environmental suitability of the invention is excellent, steady and smooth can be worked in the range of -40 DEG C~+55 DEG C.This is main
It is to be determined by the structure of shafting and the selection of lubricating grease.The shafting span of the zoom mechanism of the present invention is larger, therefore employs
One end is fixed, the mode that one end is slided, stuck so as to avoid the shafting caused by expanding with heat and contract with cold under low temperature and high-temperature condition
Phenomenon occurs.Match materials principle is also utilized simultaneously, ensure that the material coefficient of thermal expansion matching of shafting critical component.It is and of the invention
Used lubricating grease is the lubricating grease of flight use, and environmental suitability is splendid.
4th, compact overall structure of the present invention, by special light-weight design, volume and weight is controlled less
Level, while also assures that overall good stability, high comprehensive performance.
Brief description of the drawings
Fig. 1 is a kind of facing structure signal of zoom mechanism for the switching of the visual field of infrared optical imaging system two of the present invention
Figure；
Fig. 2 is a kind of left view structural representation of zoom mechanism for the switching of the visual field of infrared optical imaging system two of the present invention
Figure；
Fig. 3 is a kind of sectional structure signal of zoom mechanism for the switching of the visual field of infrared optical imaging system two of the present invention
Figure；
Fig. 4 is a kind of stereochemical structure signal of zoom mechanism for the switching of the visual field of infrared optical imaging system two of the present invention
Figure；
Fig. 5 is a kind of zoom understructure of zoom mechanism for the switching of the visual field of infrared optical imaging system two of the present invention
Schematic diagram；
Fig. 6 is a kind of precision bearing system assembling of zoom mechanism for the switching of the visual field of infrared optical imaging system two of the present invention
Schematic diagram；
Fig. 7 is a kind of zoom lens barrel structure of zoom mechanism for the switching of the visual field of infrared optical imaging system two of the present invention
Schematic diagram.
Embodiment
The present invention is further elaborated below in conjunction with the accompanying drawings.
As shown in Figures 1 to 7, a kind of zoom mechanism for the switching of the visual field of infrared optical imaging system two, using rotation
Switching mode, switch speed is fast, less than 2 seconds, while meeting to be switched fast zoom, has very high positioning precision and repetition
Positioning precision.It can ensure that infrared optical imaging system does not lose target being tracked to distant object in measurement process,
And there is very high measurement accuracy.It includes zoom base 1, multi-turn potentiometer 2, spring assembly, zoom rocking bar 8, zoom gear
9th, zoom lens barrel 10, motor 11, mechanical position limitation 12, potentiometer linkage gear 13, motor-driven gear 14, zoom lens barrel connecting shaft
15 and precision bearing system.
The zoom base 1 is U-shaped, its pedestal and integrated platform as whole zoom mechanism, is closed using high intensity aluminium
Golden 7A09, by special rational structure design and light-weight design, for example, engraved structure light-weight design, using special
Manufacturing process, ensure its fabulous intensity, while the premium properties such as rigidity and stability, do not influence base intensity and just
In the case of degree, the total quality of zoom base 1 is greatly reduced.
Precision bearing system is arranged on zoom base 1, and precision bearing system includes trim ring 16-1 in bearing, the outer trim ring 16-2 of bearing,
First axle 16-3, clutch shaft bearing 16-4, bearing spacer 16-5, first bearing seat 16-6, second bearing 16-7, second bearing seat
16-8,3rd bearing 16-9, the second axle 16-10.First bearing seat 16-6 and second bearing seat 16-8 are arranged on zoom base 1
On, clutch shaft bearing 16-4, second bearing 16-7 and 3rd bearing 16-9 are separately positioned on first bearing seat 16-6 and second bearing
In seat 16-8, bearing 16-4 and second bearing 16-7 are separated by bearing spacer 16-5, and the outer trim ring 16-2 of bearing passes through screw pressure
It is tightened on first bearing seat 16-6, trim ring 16-1 is threadedly attached on first axle 16-3 in bearing.3rd bearing 16-9's
Outer ring coordinates with second bearing seat 16-8, and 3rd bearing 16-9 inner ring is pressed on the second axle 16-10 by zoom rocking bar 8, becomes
Times gear 9 is fixedly connected by the first axle 16-3 in precision bearing system with zoom rocking bar 8.
Precision bearing system is used using the pairing of high-precision P4 levels angular contact ball bearing, while uses back-to-back mounting means,
Isolated by outer shroud, the mode that inner ring compresses carries out pretension, further increases the running accuracy of shafting, final result is axle
The circular runout of system is within 0.01mm.High-precision shafting causes zoom lens barrel 10 to have very high positioning precision and repeat to determine
Position precision, so as to ensure that whole zoom mechanism is repeated several times in handoff procedure, zoom microscope group axial location remains constant,
And then avoid handoff procedure and introduce aberration, influence the imaging effect of optical system.The span of precision bearing system is larger, meanwhile, if
The use temperature range of meter is -40 DEG C~+55 DEG C, and therefore, the axial stretching amount of precision bearing system is larger (expanding with heat and contract with cold), therefore axle
It is fixed in design process using one end, the mode that one end is slided improves its environmental suitability.
Motor 11 is fixedly mounted on the bottom outside of zoom base 1 by screw, and motor-driven gear 14 is arranged on zoom bottom
The inner side of 1 bottom of seat, and it is corresponding with the position of motor 11, motor-driven gear 14 is fixed on the output shaft of motor 11.Motor
Drive gear 14 is engaged with zoom gear 9, and 2 zoom lens barrels 10 are fixed together by 2 zoom lens barrel connecting shafts 15, is become
Times gear 9 is fixedly connected with the zoom lens barrel connecting shaft 15 of side, and the zoom lens barrel connecting shaft 15 of opposite side passes through screw and
Two axle 16-10 are fixedly connected.The both ends of zoom lens barrel 10 without lightening recesses side respectively by screw fixed weight block 4, using with
Pouring weight 4 carries out trim to zoom lens barrel 10.The purpose of trim is so that zoom lens barrel 10 is for homeostasis state, i.e. zoom
The remains stationary in the state of without External force interference of lens barrel 10, does not rotate.So on the one hand be advantageous to zoom mechanism to be switched to
Up to the stability behind precalculated position, the control difficulty of zoom mechanism on the other hand can be greatly reduced.
Potentiometer linkage gear 13 is also engaged with zoom gear 9, and multi-turn potentiometer 2 is arranged on by potentiometer briquetting 3 to be become
The outside of times base 1, with the position correspondence of potentiometer linkage gear 13, the potentiometer linkage gear 13 is fixed to multi-turn potentiometer 2
Axle on, be so achieved that real-time detection of the multi-turn potentiometer 2 to the position of zoom lens barrel 10, so as to constitute closure control back
Road, that is, control closed loop is formed, then the potentiometric position of multi-turn can be read in real time with the use of the software kit having been developed for
Information, and motor action is precisely controlled, and then realize accurate control of the zoom mechanism to the position of zoom lens barrel 10.
The motor drive gear 14 of motor 11, zoom gear 9 is driven, so as to drive potentiometer linkage gear 13, realized
The real-time detection of the main drive path and multi-turn potentiometer 2 of the rotation of zoom lens barrel 10 to the position of zoom lens barrel 10 is driven, this
Realize zoom handoff functionality mechanism fast accurate.
The zoom gear 9 of zoom mechanism, there is gap, meeting between potentiometer linkage gear 13 and motor-driven gear 14
Inevitably backlash be present.It is difficult to so fully relying on the precise positioning zoom lens barrel 10 of motor 11.Therefore, zoom mechanism
Reach the purpose of the precise positioning of zoom lens barrel 10 using spring assembly, realized in a manner of back-moving spring 7 and lock work(in place
Can, while eliminate gear error of backlash.
Zoom rocking bar 8 is connected with spring assembly, and spring assembly includes, spring pressuring plate 5, spring draw ring 6 and spring 7.Zoom
Rocking bar 8 is arranged on the outside of zoom base 1, and spring pressuring plate 5 is separately fixed on zoom rocking bar 8 and zoom base 1, and spring 7, which hooks, to be drawn
In hole on to two spring draw rings 6, and then it is fixed on by spring draw ring 6 on spring pressuring plate 5.Spring pressuring plate 5 is drawn spring
Ring 6 carries out spacing, prevents spring draw ring 6 from deviating from rotation process.Spring draw ring 6 uses wear-resisting brass, largely
On reduce frictional resistance, so as to ensure that spring assembly flexibly works.The parameter of spring 7 is then to consider zoom lens barrel 10
Rotary inertia and the factor such as output torque of motor 11 determine.
Due to the effect of spring 7 so that zoom lens barrel 10 limits in extreme position and the machinery being arranged on the inside of zoom base 1
Position 12 is brought into close contact all the time, so as to eliminate the influence that backlash is brought, while also ensure that zoom mirror under the powering-off state of motor 11
10 position keeps constant.The mode coordinated using spring 7 and zoom rocking bar 8, realizes 10 two extreme positions of zoom lens barrel
Spring 7 tense.In Fig. 1, it is an extreme position when zoom lens barrel 10 is horizontal, is another when zoom lens barrel 10 is vertical
Extreme position.And the two extreme positions are ensured by being arranged on the mechanical position limitation 12 on the inside of zoom base.By dress
Work is ground in accurate the repairing of mediator person, it is ensured that the resetting error of zoom lens barrel 10 is within 0.01mm.
The axis of the position of zoom rocking bar 8 and zoom lens barrel 10 is always consistent in the range of 0 °~90 °.Therefore, it is right
For spring 7, its critical localisation is horizontal direction 45 ° of directions counterclockwise.When spring 7 is for the angle, elastic force is maximum.
In the range of 0 °~45 °, the pulling force of spring 7 causes zoom lens barrel 10 to be maintained at horizontal level (0 °), and in the range of 45 °~90 °,
The pulling force of spring 7 causes zoom lens barrel 10 to be maintained at vertical position (90 °).
Motor 11 is electric motor with large torque, has enough driving moments, to overcome the pulling force of spring 7, completes zoom switching
Action.Meanwhile during switching action is completed, after extreme position of the zoom rocking bar 8 by the elastic force of spring 7 maximum, motor
11 active force can play cushioning effect, so as to avoid zoom lens barrel 10 and the sharp impacts of mechanical position limitation 12.Sharp impacts can
It can cause mechanical position limitation 12 that micro-displacement occurs, so as to influence to be ultimately imaged effect.
Mechanical position limitation 12 has fabulous rigidity, hardness and position stability using the processing of extra super duralumin alloy material,
So as to avoid it with being plastically deformed during the contact-impact of zoom lens barrel 10.Meanwhile by special accurate adjustment work
Skill, it is determined that the exact position of mechanical position limitation 12, so as to ensure that the extreme position of zoom lens barrel 10 meets wanting for optical system
Ask.Mechanical position limitation 12 grinds locating surface by accurate repair, is more conducive to realization and is precisely located, so as to ensure that zoom mechanism switched
The stability of image quality in journey so that target surface optical axis variable quantity caused by zoom mechanism handoff procedure X to two sides of Y-direction
To a respectively less than pixel dimension, i.e. 0.015mm.
Claims (6)
1. a kind of zoom mechanism for the switching of the visual field of infrared optical imaging system two, including zoom base (1), multi-turn potentiometer
(2), spring assembly, zoom rocking bar (8), zoom gear (9), zoom lens barrel (10), motor (11), mechanical position limitation (12), current potential
Count linkage gear (13), motor-driven gear (14), zoom lens barrel connecting shaft (15) and precision bearing system；
Characterized in that, the precision bearing system be arranged on zoom base (1) on, the zoom gear (9) by precision bearing system with
Zoom rocking bar (8) is fixedly connected, and zoom gear (9) is fixedly connected with zoom lens barrel connecting shaft (15), the zoom rocking bar (8) with
Spring assembly connects；The zoom gear (9) is engaged with motor-driven gear (14) and potentiometer linkage gear (13) respectively；Institute
Mechanical position limitation (12) is stated to be arranged on zoom base (1)；The motor (11) and multi-turn potentiometer (2) are fixed on zoom base
(1) on；
Motor (11) the motor drive gear (14), zoom gear (9) and potentiometer linkage gear (13) is driven to rotate,
Realize and drive zoom lens barrel (10) rotation and real-time detection of the multi-turn potentiometer (2) to zoom lens barrel (10) position.
2. a kind of zoom mechanism for the switching of the visual field of infrared optical imaging system two as claimed in claim 1, its feature exist
In the spring assembly includes, spring pressuring plate (5), spring draw ring (6) and spring (7)；The spring pressuring plate (5) is fixed respectively
On zoom rocking bar (8) and zoom base (1), spring (7) is fixed on spring pressuring plate (5) by spring draw ring (6).
3. a kind of zoom mechanism for the switching of the visual field of infrared optical imaging system two as claimed in claim 1, its feature exist
In the axis of the zoom rocking bar (8) is consistent with the axis of zoom lens barrel (10) in the range of 0 °~90 °；Spring (7)
Position is horizontal direction 45 ° of directions counterclockwise, when the position of spring (7) 45° angle counterclockwise more than the horizontal direction, elastic force
It is maximum；In the range of 0 °~45 °, the pulling force of spring (7) makes zoom lens barrel (10) be maintained at 0 °, in the range of 45 °~90 °, bullet
The pulling force of spring (7) causes zoom lens barrel (10) to be maintained at 90 °.
4. a kind of zoom mechanism for the switching of the visual field of infrared optical imaging system two as claimed in claim 1, its feature exist
In in addition to potentiometer briquetting (3), the multi-turn potentiometer (2) is arranged on zoom base (1) outside by potentiometer briquetting (3)
Side and it is fixed to multi-turn potentiometer (2) with potentiometer linkage gear (13) position correspondence, the potentiometer linkage gear (13)
On axle, real-time detection of the multi-turn potentiometer (2) to zoom lens barrel (10) position is realized, constitutes closed control loop.
5. a kind of zoom mechanism for the switching of the visual field of infrared optical imaging system two as claimed in claim 1, its feature exist
In the groove side at zoom lens barrel (10) both ends passes through screw fixed weight block (4) respectively.
6. a kind of zoom mechanism for the switching of the visual field of infrared optical imaging system two as claimed in claim 1, its feature exist
In the precision bearing system is used using the pairing of high-precision P4 levels angular contact ball bearing, while uses back-to-back mounting means, is led to
Outer shroud isolation is crossed, the mode that inner ring compresses carries out pretension.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443089A (en) * | 2018-11-30 | 2019-03-08 | 河南平原光电有限公司 | High-precision switching and positioning mechanism in a kind of optical-mechanical system |
| CN109471235A (en) * | 2018-12-27 | 2019-03-15 | 北方导航控制技术股份有限公司 | A kind of switching of visual field and focus control |
| CN111796382A (en) * | 2020-07-21 | 2020-10-20 | 中国科学院长春光学精密机械与物理研究所 | Optical system switching mechanism |
| CN112285870A (en) * | 2020-11-04 | 2021-01-29 | 福建福光股份有限公司 | Infrared double-view-field switching lens and working method |
| CN114895511A (en) * | 2022-06-15 | 2022-08-12 | 深圳市爱派赛科技有限公司 | Wide panorama optical lens equipment of application scope |
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