CN109239885A - Continuous zoom thermal imaging system it is guide locating device provided - Google Patents
Continuous zoom thermal imaging system it is guide locating device provided Download PDFInfo
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- CN109239885A CN109239885A CN201811206098.0A CN201811206098A CN109239885A CN 109239885 A CN109239885 A CN 109239885A CN 201811206098 A CN201811206098 A CN 201811206098A CN 109239885 A CN109239885 A CN 109239885A
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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
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/30—Transforming light or analogous information into electric information
- H04N5/33—Transforming infrared radiation
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
Continuous zoom thermal imaging system it is guide locating device provided, be related to thermal infrared imager field, especially it is a kind of meet thermal imaging system product to tracking and pointing accuracy requirement.The present invention is mounted on continuous zoom thermal imaging system, it is connect with the zoom group of continuous zoom thermal imaging system and compensation group, it is characterized in that the positioning device includes guided way, cam canister and guide pin group, guided way is two, is separately fixed at continuous zoom thermal imaging system arranged on left and right sides；Cam canister is hollow cylindrical, and continuous zoom thermal imaging system is arranged inside cam canister, and two groups of shaped form sliding slots are provided on cam canister barrel；Guide pin group is two pairs, is separately mounted on two guided ways, and is slided along guided way, and pulley is provided at the top of each guide pin group, and pulley is arranged in corresponding sliding slot, moves along the chute.The present invention provides driving source by columned cam canister, is linked using zoom curve group and compensated curve group, under the orientation of guided way, realizes that the linear motion along optical axis direction, optical axis stable are preferable.
Description
Technical field
The present invention relates to thermal infrared imager field, especially a kind of raising optical axis stable keeps optical axis stable, meets heat
As instrument product to tracking and pointing accuracy require continuous zoom thermal imaging system it is guide locating device provided.
Background technique
Currently, the driving of continuous zoom thermal imaging system in the market and guide-localization are mainly the following pattern:
The first is on cylindrical cam while to design zoom curved groove and the realization driving of compensated curve slot, using in lens barrel group
Cylindrical surface and straight-line groove realize guide-localization, in this zoom mechanism, structure mainly by lens barrel group, zoom group, cylindrical cam,
Cam guide pin and compensation group composition, zoom curve and compensated curve on cylindrical cam are evenly arranged on are mutually 180 ° of column respectively
On face, cam inner cavity medium design be it is hollow, be set in lens barrel group, the internal diameter of the outer diameter of zoom group and compensation group and lens barrel group
For mating surface, lens barrel group has straight-line groove along axial design, as the guide-localization face that zoom group and compensation group are axially moveable,
Under the rotation of cam drives, zoom group and compensation group are mutually connected, and complete focusing and zooming process；This structure type, thermal imaging system
Zoom precision is high during focusing and zooming, and radial dimension is small, but optical axis stable low precision, and drift is serious, and low-temperature test is easy
It is stuck.
Second is on cylindrical cam while to design zoom curved groove and the realization driving of compensated curve slot, using two circles
Column guide rod realizes guide-localization, and in this zoom mechanism, structure is mainly by preceding objective lens, zoom group balladeur train, cylindrical cam, convex
Take turns guide rail and compensation group balladeur train composition.This structure and a kind of upper structure are alike, and only two straight-line grooves in lens barrel group are changed
At two guide rails, motion process is the same as the first；This structure type, thermal imaging system zoom precision during focusing and zooming is high, light
Axis lasting accuracy is better than upper one kind, but the precision of aiming and tracking is also not achieved, and radial dimension is big, and low-temperature test is also easy card
Extremely.
The third is on cylindrical cam while to design zoom curved groove and the realization driving of compensated curve slot, is respectively adopted three
The uniformly distributed guide post guide wheel of root realizes the guide-localization of zoom group and compensation group, and in this zoom mechanism, structure is mainly by main shaft
Body, zoom group, zoom group balladeur train, cylindrical cam, guide post guide wheel, compensation group balladeur train and compensation group object lens composition；Zoom group balladeur train
Three guide posts are fitted with on compensation group balladeur train frame, 3~5 leading with eccentric structure are separately installed on every guide post
Wheel, guide wheel and two side contacts of main shaft guide groove form rolling movement, the installation site difference of zoom group and compensation group guide post
60 °, main shaft has straight-line groove along axial design.In the case where the rotation of cam drives, zoom group and compensation group are mutually connected, and complete to adjust
Burnt zoom process；This structure type, thermal imaging system move comfortably, steadily during focusing and zooming, are not likely to produce stuck phenomenon,
But kinematic accuracy is low, the precision of aiming and tracking is not achieved at all, and radial dimension is big.
4th kind is on cylindrical cam while to design zoom curved groove and the realization driving of compensated curve slot, is respectively adopted three
The uniformly distributed guide post of root and retainer realize the guide-localization of zoom group and compensation group, this zoom mechanism, and main structure uses type
Three uniformly distributed guide wheels in formula 3 slide zoom pattern, are improved locally its structure.Retainer component is by steel
Ball, retainer and positioning screw composition, steel ball are mounted in the hole processed on retainer, when designing mounting hole, control processing
Size prevents steel ball in other side from dropping out, and gently rushes several points in mounted steel ball surrounding with tool on mounting surface, makes
Steel ball can be contained in retainer, and retainer component is connected by screw, zoom group with compensation group frame, can and be corresponded to
Frame move together, make to compensate frame, main body axis and bearing retainer form sliding bearing pair.By strictly designing, processing
And assembly, it is being axially moved frame comfortably, improves the kinematic accuracy of zoom mechanism, be maintained at optical axis stable precision
Within 0.01mm；This structure type, thermal imaging system move comfortable, steady, kinematic accuracy height during focusing and zooming, and optical axis is steady
It is qualitative, but radial dimension is too big, and adjustment craftsmanship is poor, and assembly is complicated.
5th kind is the function that continuous zoom is realized using electric cam.Because its Zoom lens group determined and compensation are saturating
Microscope group motion profile can be adaptively changed according to temperature change.Zoom group and the compensation axially opposing fortune of Zu Liangtao mechanism
Dynamic, the curve movement between them can be corrected according to thermal imaging system built-in temperature sensor values real-time perfoming, therefore be referred to as electricity
Sub- cam；Thermal imaging system continuous zoom function realized jointly by zoom mechanism group and compensation mechanism group, zoom mechanism group and compensation machine
Structure group is designed using identical principle, is driven by a motor screw rod and is spinned movement, passes through the gap that disappears being connected on mirror holder
Nut is converted into the screw of screw rod the linear motion of microscope group, under the orientation of main guide rail, realizes along optical axis direction
Linear motion.Mirror holder carries out location and installation along optical axis direction by a screw rod and the gap nut that disappears, and the gap nut that disappears is adopted
It is installed on mirror holder with ring flange interface form, screw both end is separately installed with spring bearing.There are two straight for installation on main guide rail
Spool is held, and a linear bearing is equipped on secondary guide rail, can effectively eliminate mirror holder motion process using main guide rail and time guide rail
The rotation of mirror holder wire winding rod axis caused by the screw of middle screw rod.High precision position encoder can feed back machine effectively in real time
The location information of structure.During production debugging, the location information of reading position encoder under condition of different temperatures forms temperature
Degree location information table is simultaneously cured in thermal imaging system software, in thermal imaging system booting, by calling the information table, it can be achieved that in difference
Thermal imaging system can quick blur-free imaging and quick zoom under the conditions of temperature；To guarantee that optical axis deviation meets system requirements, assembling
The respective straightness of the main guide rail to zoom mechanism group and compensation mechanism group, screw rod and secondary guide rail is not only needed to adjust in journey
Section, it is also necessary to which the depth of parallelism between screw rod, main guide rail and secondary guide rail is adjusted.If the straightness of moving cell is mutual
Between the depth of parallelism cannot meet the requirements, zoom group and compensation group will appear the unstable phenomenon of movement during the motion, in low temperature
Under the conditions of there is the even stuck phenomenon of clamping stagnation due to the decline of motor performance, or be zoom group and the movement of compensation group occur
Mismatch, system is unable to blur-free imaging, thus cause product effectively suspicious object cannot be observed, search and track, spy
It surveys and identifies.Meanwhile zoom mechanism group/depth of parallelism between compensation mechanism group and systematic optical axis should also be adjusted, if become
Times mechanism group/depth of parallelism between compensation mechanism group and systematic optical axis is overproof, and optical property and visual field will receive influence, the work of product
It can be declined with distance.
Summary of the invention
It is to be solved by this invention be exactly existing continuous zoom thermal imaging system driving and guide-localization there are the problem of, provide
A kind of raising optical axis stable keeps optical axis stable, meets the continuous zoom that thermal imaging system product requires tracking and pointing accuracy
Thermal imaging system it is guide locating device provided.
Continuous zoom thermal imaging system of the invention it is guide locating device provided, be mounted on continuous zoom thermal imaging system, become with continuous
The zoom group of times thermal imaging system is connected with compensation group, it is characterised in that and the positioning device includes guided way, cam canister and guide pin group,
Guided way is two, is separately fixed at continuous zoom thermal imaging system arranged on left and right sides；Cam canister is hollow cylindrical, continuous zoom heat
Picture instrument is arranged inside cam canister, and two groups of shaped form sliding slots, respectively zoom curve group and compensation are provided on cam canister barrel
Curve group, the setting of zoom curve group sliding slot are arranged in cam canister front half section, compensated curve group sliding slot in the cam canister second half section；Guide pin
Group is two pairs, and one pair of them guide pin group is connect with zoom group, and another pair guide pin group is connect with compensation group camera lens, and each pair of guide pin group is equal
It is two, is separately mounted on two guided ways, and slided along guided way, is provided with pulley, pulley at the top of each guide pin group
It is arranged in corresponding sliding slot, moves along the chute.
The zoom curve group sliding slot includes two zoom curve chutes, and two zoom curve chutes are symmetricly set on cylinder
Wall two sides, the disc angle between the initial and end of every zoom curve chute is 120 °；The two guide pin groups difference being connect with zoom group
It is arranged in two zoom curve chutes, is moved by pulley along zoom curve chute.
The compensated curve group sliding slot includes two compensated curve sliding slots, and two compensated curve sliding slots are symmetricly set on cylinder
Wall two sides, the disc angle between the initial and end of every compensated curve sliding slot is 120 °；Two guide pin groups being connect with compensation group camera lens
It is separately positioned in two compensated curve sliding slots, by pulley along compensated curve runner movement.
Continuous zoom thermal imaging system of the invention it is guide locating device provided, structure is simple, design science, easy to use, passes through
Columned cam canister provides driving source, makes to focus using the zoom curve group and compensated curve group that are evenly arranged on respectively on cylindrical surface
Zoom group and the linkage of compensation group realize the linear motion along optical axis direction, entire zooming procedure under the orientation of guided way
It runs smoothly, optical axis stable is preferable, and after existing model machine adjustment, full filed light axis consistency is up to 2mrad.
Detailed description of the invention
Fig. 1 is schematic diagram of internal structure of the present invention.
Fig. 2 is cam canister structural schematic diagram of the present invention.
Wherein, zoom group 1, compensation group 2, guided way 3, cam canister 4, guide pin group 5, zoom curve group 6, compensated curve group 7,
Pulley 8.
Specific embodiment
Embodiment 1: a kind of continuous zoom thermal imaging system it is guide locating device provided, be mounted on continuous zoom thermal imaging system, and even
The zoom group 1 and compensation group 2 of continuous zoom thermal imaging system connect, which includes guided way 3, cam canister 4 and guide pin group 5,
Guided way 3 is two, is separately fixed at continuous zoom thermal imaging system arranged on left and right sides；Cam canister 4 is hollow cylindrical, continuous zoom
Thermal imaging system is arranged inside cam canister 4, and two groups of shaped form sliding slots, respectively 6 He of zoom curve group are provided on 4 barrel of cam canister
Compensated curve group 7, the setting of 6 sliding slot of zoom curve group are arranged after cam canister 4 in 4 front half section of cam canister, 7 sliding slot of compensated curve group
Half section；Guide pin group 5 is two pairs, and one pair of them guide pin group 5 is connect with zoom group 1, and another pair guide pin group 5 and 2 camera lens of compensation group connect
It connects, each pair of guide pin group 5 is two, is separately mounted on two guided ways 3, and slide along guided way 3, each guide pin group 5 is pushed up
Portion is provided with pulley 8, and pulley 8 is arranged in corresponding sliding slot, moves along the chute.6 sliding slot of zoom curve group includes two changes
Burnt curve chute, two zoom curve chutes are symmetricly set on barrel two sides, the disc between the initial and end of every zoom curve chute
Angle is 120 °；Two guide pin groups 5 connecting with zoom group 1 are separately positioned in two zoom curve chutes, pass through 8 edge of pulley
The movement of zoom curve chute.7 sliding slot of compensated curve group includes two compensated curve sliding slots, and two compensated curve sliding slots are symmetrical arranged
Disc angle between barrel two sides, the initial and end of every compensated curve sliding slot is 120 °；Two connect with 2 camera lens of compensation group
Guide pin group 5 is separately positioned in two compensated curve sliding slots, by pulley 8 along compensated curve runner movement.
Claims (3)
1. a kind of continuous zoom thermal imaging system is guide locating device provided, it is mounted on continuous zoom thermal imaging system, with continuous zoom thermal imagery
The zoom group (7) and compensation group (2) of instrument connect, it is characterised in that the positioning device include guided way (3), cam canister (4) and
Guide pin group (5), guided way (3) are two, are separately fixed at continuous zoom thermal imaging system arranged on left and right sides；Cam canister (4) is hollow circle
Column, the setting of continuous zoom thermal imaging system is internal in cam canister (4), is provided with two groups of shaped form sliding slots on cam canister (4) barrel, point
Not Wei zoom curve group (6) and compensated curve group (7), the setting of zoom curve group (6) sliding slot is in cam canister (4) front half section, compensation
Curve group (7) sliding slot was arranged in cam canister (4) second half section；Guide pin group (5) is two pairs, one pair of them guide pin group (5) and zoom group
(7) it connects, another pair guide pin group (5) is connect with compensation group (2) camera lens, and each pair of guide pin group (5) is two, is separately mounted to two
It on root guided way (3), and slides along guided way (3), is provided with pulley (8) at the top of each guide pin group (5), pulley (8) setting
In corresponding sliding slot, move along the chute.
2. continuous zoom thermal imaging system as described in claim 1 is guide locating device provided, it is characterised in that the zoom curve
Group (6) sliding slot includes two zoom curve chutes, and two zoom curve chutes are symmetricly set on barrel two sides, every zoom curve
Disc angle between the initial and end of sliding slot is 120 °；Two guide pin groups (5) connecting with zoom group (7) are separately positioned on two changes
In burnt curve chute, moved by pulley (8) along zoom curve chute.
3. continuous zoom thermal imaging system as described in claim 1 is guide locating device provided, it is characterised in that the compensated curve
Group (7) sliding slot includes two compensated curve sliding slots, and two compensated curve sliding slots are symmetricly set on barrel two sides, every compensated curve
Disc angle between the initial and end of sliding slot is 120 °；Two guide pin groups (5) connecting with compensation group (2) camera lens are separately positioned on two
In root compensated curve sliding slot, by pulley (8) along compensated curve runner movement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811206098.0A CN109239885A (en) | 2018-10-17 | 2018-10-17 | Continuous zoom thermal imaging system it is guide locating device provided |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811206098.0A CN109239885A (en) | 2018-10-17 | 2018-10-17 | Continuous zoom thermal imaging system it is guide locating device provided |
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| CN109239885A true CN109239885A (en) | 2019-01-18 |
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| CN201811206098.0A Pending CN109239885A (en) | 2018-10-17 | 2018-10-17 | Continuous zoom thermal imaging system it is guide locating device provided |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110879448A (en) * | 2019-11-04 | 2020-03-13 | 中国科学院西安光学精密机械研究所 | Continuous zooming device and assembling method thereof |
| CN112697069A (en) * | 2020-12-28 | 2021-04-23 | 昆明北方红外技术股份有限公司 | Optical zoom cam curve detection device and detection method |
| CN112719783A (en) * | 2020-12-03 | 2021-04-30 | 河北汉光重工有限责任公司 | Method for machining cylindrical cam with built-in curve groove |
| CN113687491A (en) * | 2021-07-16 | 2021-11-23 | 中国北方车辆研究所 | Automatic zooming mechanism driven by double-stepping motor |
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| TWD179370S (en) * | 2015-11-19 | 2016-11-01 | 政達木業有限公司 | Door Flower (12) |
| CN207704122U (en) * | 2017-10-19 | 2018-08-07 | 鹰潭市永威光电仪器有限公司 | A kind of infrared lens of continuous vari-focus |
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| CN2338760Y (en) * | 1998-06-25 | 1999-09-15 | 中国科学院光电技术研究所 | Linkage varifocus objective |
| JP2006064834A (en) * | 2004-08-25 | 2006-03-09 | Canon Inc | Television lens |
| CN103336350A (en) * | 2013-07-26 | 2013-10-02 | 北方信息控制集团有限公司 | Electric continuous zooming mechanism with high-stability image surface |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110879448A (en) * | 2019-11-04 | 2020-03-13 | 中国科学院西安光学精密机械研究所 | Continuous zooming device and assembling method thereof |
| CN112719783A (en) * | 2020-12-03 | 2021-04-30 | 河北汉光重工有限责任公司 | Method for machining cylindrical cam with built-in curve groove |
| CN112697069A (en) * | 2020-12-28 | 2021-04-23 | 昆明北方红外技术股份有限公司 | Optical zoom cam curve detection device and detection method |
| CN113687491A (en) * | 2021-07-16 | 2021-11-23 | 中国北方车辆研究所 | Automatic zooming mechanism driven by double-stepping motor |
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Application publication date: 20190118 |
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