CN202533643U - High-precision focus control device of remote sensing instrument - Google Patents
High-precision focus control device of remote sensing instrument Download PDFInfo
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- CN202533643U CN202533643U CN201220027478XU CN201220027478U CN202533643U CN 202533643 U CN202533643 U CN 202533643U CN 201220027478X U CN201220027478X U CN 201220027478XU CN 201220027478 U CN201220027478 U CN 201220027478U CN 202533643 U CN202533643 U CN 202533643U
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Abstract
The utility model discloses a high-precision focus control device of a remote sensing instrument. The high-precision focus control device of the remote sensing instrument includes two main parts of a focus control mechanism and a locking mechanism. Main components of the focus control mechanism such as a drive motor, a precision ball screw and a potentiometer are all installed in a focus control mechanism supporting barrier. A fixed lens and a focus control lens are installed in a lens supporting barrel. The focus control moving parts and the focus control lens are connected through a focus control connection frame. In a working process, a rotary motion of the drive motor is changed to a linear motion through the screw, and a high-precision linear sliding table is utilized for pushing the focus control lens to move axially. The focus control position is controlled according to feedback signals of the potentiometer. The locking mechanism in the high-precision focus control device of the remote sensing instrument is used for locking an initial position of the focus control lens. The high-precision focus control device of the remote sensing instrument provided by the utility model can drive heavy-caliber optical elements, and has good motion stability, high positioning precision and repeated positioning precision. And the high-precision focus control device of the remote sensing instrument can meet long-service-lifetime focus control requirements of a space remote sensing camera. Besides, by adopting the locking mechanism, a ground position having the optimal image quality can be guaranteed not to change.
Description
Technical field
This patent relates to the space remote sensing technical field, particularly is used for the high precision focus control of space high sensitivity remote optical sensing instrument.
Background technology
Space remote instrument is different from the terrestrial optical instrument, and it will stand the mechanical environment such as impact, vibration, overload at launching phase; Simultaneously; Camera can receive the influence of environmental baselines such as microgravity, high vacuum, temperature alternating again at the rail working stage; After these a series of rugged surroundings of camera experience; Can make primary and secondary mirror or lens interbody spacer change, thereby cause best focal plane that skew to a certain degree takes place, directly influence the image quality of camera under the serious situation.The high sensitivity remote optical sensing instrument variation of environment to external world is more responsive; In order to guarantee that space camera still can have higher image quality under rugged surroundings; Then need carry out active correction to the position of magazine some optical element, thus the update the system focal plane.
The focus adjusting mechanism of present domestic space high sensitivity camera adopts gear set or cam to focus more, and the precision of the focus adjusting mechanism of this dual mode receives the influence of its drive disk assembly machining precision bigger.Especially the processing request to cam curve is higher, and manufacture difficulty is bigger.Simultaneously, gear drive or cam drive are sliding friction, and space cold welding problem and long-life lubrication problem also are a difficult problem that awaits solving at present.
Summary of the invention
For overcoming the technical defective of existing focusing, this patent will provide a kind of SPACE APPLICATION, compact conformation, high, the good stability of focusing accuracy exactly, and is applicable to the focus control of optical elements of large caliber.
The high precision focus control of this patent comprises focus adjusting mechanism and latch mechanism two large divisions.Wherein focus adjusting mechanism is used for the motion of active adjustment focusing lens, thus the focal plane of corrective system, and latch mechanism is used to lock the initial position of focusing lens, is convenient to the examination of focus adjusting mechanism through the space mechanics environmental test.Wherein focus adjusting mechanism comprises that focus adjusting mechanism support tube 1, drive motor 2, flexible clutch 3, ball screw support precision bearing I 4, precision ball screw 5, ball screw and support precision bearing II6, shaft coupling 7, potentiometer 8, focusing link 9, high-accuracy linear slide unit 10, fixed lens 11, focusing lens 12, lens supports tube 13; Latch mechanism comprises locking pin 14, solenoid valve 15, position transducer 16.
Wherein: focus adjusting mechanism support tube 1 is a tubular structure, adopts titanium alloy or stainless steel material; But drive motor 2 adopts the stepper motor of rotatings, and rotating speed is less than＜3r/min; Flexible clutch 3 adopts stainless steel material; Precision bearing I 4 and precision bearing II 6 select angular contact ball bearing and the deep groove ball bearing of accuracy class more than the P4 level respectively for use; Precision ball screw 5 accuracy classes reach more than the P2 level; Potentiometer 8 is rotary angular position pick up; Focusing link 9 is a U font structure, adopts titanium alloy or stainless steel material; High-accuracy linear slide unit 10 precision are 0.002mm/100mm, and its material is a stainless steel; Locking pin 14 is the head end cone structure, can conveniently embed in the mount pad of focusing lens 12; Position transducer 16 adopts microswitch or Hall element.
In the high precision focus control of this patent; Drive motor 2 is placed in the focus adjusting mechanism support tube 1; Through flexible clutch 3 precision ball screw 5 is connected with drive motor 2 output terminals, precision bearing I 4 and precision bearing II 6 support the front-end and back-end of precision ball screw 5 respectively; Potentiometer 8 is connected with precision ball screw 5 front end output shafts through shaft coupling 7; Fixed lens 11 is installed in the lens supports tube 13 through its lens mount pad; Focusing lens 12 is installed in the focusing lens rotating ring, and rotating ring is connected through high-accuracy linear slide unit 10 with the focusing lens stationary ring, and the focusing lens assembly that assembles is as in the lens supports tube 13; Focusing lens rotating ring one side is fixed in focusing link 9 upper ends, and the lower end is fixed on the nut seat of bottom precision ball screw 5; Solenoid valve 15 is positioned at lens supports tube 13 tops, and its locking pin 14 tapered ends insert in the focusing lens rotating ring cone tank, and an other end then is fixed in the solenoid valve 15.
But described drive motor 2 is selected the rotating stepper motor for use, and it is fixed in focus adjusting mechanism support tube 1 rear end through drive motor 2 mounting flanges, and this drive motor 2 also can adopt direct current generator to substitute.
Described potentiometer 8 is installed on focus adjusting mechanism support tube 1 front end through the switching flange, and this potentiometer 8 also can adopt rotary transformer or grating encoding chi to substitute.
Described high-accuracy linear slide unit 10 its fixed guides are installed on the focusing lens stationary ring, and slide block is installed on the focusing lens rotating ring, and this high-accuracy linear slide unit 10 also can adopt high-accuracy linear bearing to substitute.
Described latch mechanism is installed on the lens supports tube 13 top mount pads, and wherein solenoid valve 15 also can adopt leak free priming system to substitute.
For prevent that focus adjusting mechanism from moving in no oily ultra-high vacuum environment cold welding takes place, needing described moving component is that precision bearing I 4, precision bearing II 6, precision ball screw 5 and high-accuracy linear slide unit 10 are taked lubricant method.This focus adjusting mechanism mode of motion belongs to geneva motion, and above-mentioned moving component is taked solid lubrication, at each moving component surface spraying MoS
2
The detailed operation process of this patent high precision focus control is described below, and its whole focus adjusting mechanism is positioned at focus adjusting mechanism support tube 1, when finding the image quality decrease that ground receives; Judge the focal plane deviation position; Focus by corresponding focusing scheme according to offset orientation, the orientation is moved in focusing promptly might be forward, again might be backward; Therefore all reserve certain focusing amount in focusing lens 12 front and back, and the drive motor 2 that uses can be realized rotating.Focusing is sent the focusing instruction by control system; Drive motor 2 receives focusing instruction back setting in motion as the drive source of focus adjusting mechanism; Drive motor 2 output terminals are connected with precision ball screw 5 through flexible clutch 3; Drive motor 2 driving forces are passed to precision ball screw 5; Precision ball screw 5 will rotatablely move again and be converted into high-precision rectilinear motion and transferring power to the link 9 of focusing, and focusing link 9 is the bridges that connect precision ball screw 5 and focusing lens 12, and focusing lens 12 is fixed on the focusing lens rotating ring simultaneously; The focusing lens stationary ring is fixed in the lens supports tube 13; The focusing lens rotating ring adopts three high-accuracy linear slide units 10 to be connected with the focusing lens stationary ring, retrains five of focusing lenss 12 through these three linear slide units and ties up degree of freedom, and promptly the rotational freedom of three directions and both direction moves radially degree of freedom.After sending the instruction of focusing, drive motor 2 drives focusing links 9 through precision ball screw 5 and moves, and drives focusing lens 12 with back focusing link 9 through the high-accuracy linear slide unit 10 of promotion and moves reposefully by set focusing amount to the focusing orientation.In the whole focusing process, control system is monitored the feedback signal of potentiometer 8 in real time, through its feedback signal indication control focusing position.
Before the emission of space large caliber camera; Whole optical system is carried out ground to be debug; Confirm the initial position of focusing lens 12 according to choosing optimum MTF principle,, can not squint for guaranteeing the initial position of focusing lens 12 after debug on ground because ball-screw nut does not have self-locking performance; Need to increase the lens latch mechanism, this device adopts 15 pairs of focusing lens rotating rings of solenoid valve to carry out mechanical self-latching.After sending the focusing lens lock instruction, solenoid valve 15 energisings, locking pin 14 breaks away from solenoid valve 15 inner spring valve bodies, and locking pin 14 moves to focusing lens 12 radial direction under external force; Simultaneously, on the focusing lens rotating ring, be furnished with a cone tank, locking pin 14 moves in the cone tank, and two cone match make its reliable lock; After several seconds, solenoid valve 15 dead electricity, its inner spring valve body ejects again, and locking pin 14 is blocked, and at this moment, focusing lens 12 promptly is locked, and focusing lens 12 is locking state before the camera emission.Camera if squint in the focal plane, before sending formal focusing movement instruction, at first will carry out the latch mechanism release in orbit the time.Send the focusing unlock command through control system, focusing solenoid valve 15 is started working, and locking pin 14 is ejected in solenoid valve 15, and the locking pin 14 of ejection is thrown off the focusing lens rotating ring immediately, and confirms through position transducer 16 feedback signals whether release is successful.After definite latch mechanism release success, can send the focusing instruction, thereby accomplish the focusing process of one whole.
The advantage of this patent: this device adopts high-accuracy ball-screw and linear slide unit, and apparatus structure is compact, can drive bigbore optical element.Can control the focusing position accurately through this device, make focusing lens bearing accuracy in axial direction reach 5 μ m, repetitive positioning accuracy reaches 2 μ m, and the lens deflection angular accuracy can reach ± and 0.05 °.Adopt ground lock mechanism to cooperate and to guarantee fully that best picture element position, ground does not change.
Description of drawings
Fig. 1 is a this patent high precision focus control structural representation;
Among the figure:
1, focus adjusting mechanism support tube 11, fixed lens
2, drive motor 12, focusing lens
3, flexible clutch 13, lens supports tube
4, ball screw supports precision bearing I 14, locking pin
5, precision ball screw 15, solenoid valve
6, ball screw supports precision bearing II 16, position transducer
7, shaft coupling
8, potentiometer
9, focusing link
10, high-accuracy linear slide unit
Embodiment
Below in conjunction with accompanying drawing, an embodiment of this patent is described in detail:
As shown in Figure 1, focus adjusting mechanism is installed in the focus adjusting mechanism support tube 1, and fixed lens 11 all is installed in the lens supports tube 13 with focusing lens 12.U type focusing link 9 one ends are installed on the nut seat of precision ball screw 5, and the other end is fixed on the focusing lens rotating ring.For making things convenient for whole optical system light school, need to guarantee that the optical axis of lens subassembly and the mechanical axis of lens supports tube 13 are consistent as far as possible.For this reason, in the Design and Machining process, the two interior circle cylindricities that assurance lens supports tube 13 and focusing lens 12, fixed lens 11 cooperate respectively are less than 0.008mm, and two interior circle concentricities are less than 0.01mm; Simultaneously, in moving process, have higher kinematic accuracy for guaranteeing focusing lens, need be with lens supports tube 13 and the 1 combination processing of focus adjusting mechanism support tube, and the depth of parallelism that guarantees two support tube axis is less than 0.01mm.
The Specifeca tion speeification of focus control and parts parameter are as follows:
1) focusing stroke :-3mm～+ 3mm;
2) focusing lens bore:＞100mm;
3) lens weight:＞0.5kg;
4) drive motor: but the rotating composite stepper motor;
5) flexible clutch: external diameter φ 25mm, internal diameter φ 6mm;
6) ball screw supports precision bearing I: customization P4 level angular contact ball bearing;
7) ball screw supports precision bearing II: customization P4 level deep groove ball bearing;
8) Bearing Installation mode: bearing adopts an end to fix, and the mounting means that an end moves about has been eliminated by the influence of temperature variation to bearing pre-fastening;
9) ball-screw: customization P2 level precision ball screw;
10) high-accuracy linear slide unit: the custom precision slide unit, its accuracy class need reach 0.002mm/100mm.
Claims (5)
1. the high precision focus control of a remote optical sensing instrument, it comprises focus adjusting mechanism and latch mechanism two large divisions, it is characterized in that:
Described focus adjusting mechanism comprises that focus adjusting mechanism support tube (1), drive motor (2), flexible clutch (3), ball screw support precision bearing I (4), precision ball screw (5), ball screw support precision bearing II (6), shaft coupling (7), potentiometer (8), focusing link (9), high-accuracy linear slide unit (10), fixed lens (11), focusing lens (12), lens supports tube (13); Latch mechanism comprises locking pin (14), solenoid valve (15) and position transducer (16), and wherein: focus adjusting mechanism support tube (1) is a tubular structure, adopts titanium alloy or stainless steel material; Drive motor (2) but adopt the stepper motor of rotating, rotating speed is less than＜3r/min; Flexible clutch (3) adopts stainless steel material; Precision bearing I (4) and precision bearing II (6) select angular contact ball bearing and the deep groove ball bearing of accuracy class more than the P4 level respectively for use; Precision ball screw (5) accuracy class reaches more than the P2 level; Potentiometer (8) is rotary angular position pick up; Focusing link (9) is a U font structure, adopts titanium alloy or stainless steel material; High-accuracy linear slide unit (10) precision is 0.002mm/100mm, and its material is a stainless steel; Locking pin (14) is the head end cone structure, can conveniently embed in the mount pad of focusing lens (12); Position transducer (16) adopts microswitch or Hall element;
In the described high precision focus control, drive motor (2) is placed in the focus adjusting mechanism support tube (1), through flexible clutch (3) leading screw (5) is connected with drive motor (2) output terminal, and two cover precision bearings (4,6) support the front-end and back-end of leading screw (5) respectively; Potentiometer (8) is connected with leading screw (5) front end output shaft through shaft coupling (7); Fixed lens (11) is installed in the lens supports tube (13) through its lens mount pad; Focusing lens (12) is installed in the focusing lens rotating ring, and rotating ring is connected through high-accuracy linear slide unit (10) with the focusing lens stationary ring, and the focusing lens assembly that assembles places in the lens supports tube (13); Focusing lens rotating ring one side is fixed in focusing link (9) upper end, and the lower end is fixed on the feed screw nut seat of bottom; Solenoid valve (15) is positioned at lens supports tube (13) top, and the tapered end of its locking pin (14) inserts in the focusing lens rotating ring cone tank, and an other end then is fixed in the solenoid valve (15).
2. the high precision focus control of a kind of remote optical sensing instrument according to claim 1 is characterized in that: described drive motor (2) can adopt direct current generator to substitute.
3. the high precision focus control of a kind of remote optical sensing instrument according to claim 1 is characterized in that: described potentiometer (8) can adopt rotary transformer or grating encoding chi to substitute.
4. the high precision focus control of a kind of remote optical sensing instrument according to claim 1 is characterized in that: described precision bearing I (4), precision bearing II (6), precision ball screw (5) and high-accuracy linear slide unit (10) adopt MoS
2Solid lubrication.
5. the high precision focus control of a kind of remote optical sensing instrument according to claim 1 is characterized in that: the available leak free priming system of described solenoid valve (15) substitutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220027478XU CN202533643U (en) | 2012-01-20 | 2012-01-20 | High-precision focus control device of remote sensing instrument |
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|---|---|---|---|
| CN201220027478XU CN202533643U (en) | 2012-01-20 | 2012-01-20 | High-precision focus control device of remote sensing instrument |
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| CN201220027478XU Withdrawn - After Issue CN202533643U (en) | 2012-01-20 | 2012-01-20 | High-precision focus control device of remote sensing instrument |
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| CN102565997A (en) * | 2012-01-20 | 2012-07-11 | 中国科学院上海技术物理研究所 | High-precision focusing device used for space optical remote sensing instrument |
| CN104166215A (en) * | 2014-08-29 | 2014-11-26 | 成都科信达实业有限公司 | Precise electric adjustment frame with low return stroke difference |
| CN104166211A (en) * | 2014-08-29 | 2014-11-26 | 成都科信达实业有限公司 | Drive mechanism of optical adjustment frame |
| CN104503061A (en) * | 2014-12-24 | 2015-04-08 | 中国科学院光电研究院 | Active thermal control focusing device for space camera |
| CN105807388A (en) * | 2014-12-30 | 2016-07-27 | 上海新跃仪表厂 | Focusing mechanism structure of small-sized surveillance satellite |
| CN106873117A (en) * | 2016-12-28 | 2017-06-20 | 中国科学院长春光学精密机械与物理研究所 | A kind of space optical remote sensor secondary mirror focusing compliant motion mechanism |
| CN108073015A (en) * | 2017-12-08 | 2018-05-25 | 中国科学院长春光学精密机械与物理研究所 | A kind of high-precision linear focus adjusting mechanism for space camera |
| WO2019062211A1 (en) * | 2017-09-30 | 2019-04-04 | 杭州海康威视数字技术股份有限公司 | Imaging device and lens focusing method |
| CN109597263A (en) * | 2017-09-30 | 2019-04-09 | 杭州海康威视数字技术股份有限公司 | A kind of imaging device and a kind of lens focusing method |
| CN110007422A (en) * | 2019-04-19 | 2019-07-12 | 东莞市普密斯精密仪器有限公司 | A kind of continuous zoom lens with linear motor and self-locking function |
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| CN102565997B (en) * | 2012-01-20 | 2013-10-23 | 中国科学院上海技术物理研究所 | High-precision focusing device used for space optical remote sensing instrument |
| CN102565997A (en) * | 2012-01-20 | 2012-07-11 | 中国科学院上海技术物理研究所 | High-precision focusing device used for space optical remote sensing instrument |
| CN104166215A (en) * | 2014-08-29 | 2014-11-26 | 成都科信达实业有限公司 | Precise electric adjustment frame with low return stroke difference |
| CN104166211A (en) * | 2014-08-29 | 2014-11-26 | 成都科信达实业有限公司 | Drive mechanism of optical adjustment frame |
| CN104166215B (en) * | 2014-08-29 | 2016-06-29 | 成都科信达实业有限公司 | Low backhaul difference electric precise adjusts frame |
| CN104503061B (en) * | 2014-12-24 | 2017-10-20 | 中国科学院光电研究院 | A kind of space camera Active thermal control focus control |
| CN104503061A (en) * | 2014-12-24 | 2015-04-08 | 中国科学院光电研究院 | Active thermal control focusing device for space camera |
| CN105807388B (en) * | 2014-12-30 | 2018-07-20 | 上海新跃仪表厂 | A kind of focus adjusting mechanism configuration of miniaturized surveillance satellite |
| CN105807388A (en) * | 2014-12-30 | 2016-07-27 | 上海新跃仪表厂 | Focusing mechanism structure of small-sized surveillance satellite |
| CN106873117A (en) * | 2016-12-28 | 2017-06-20 | 中国科学院长春光学精密机械与物理研究所 | A kind of space optical remote sensor secondary mirror focusing compliant motion mechanism |
| CN106873117B (en) * | 2016-12-28 | 2019-03-05 | 中国科学院长春光学精密机械与物理研究所 | A kind of space optical remote sensor secondary mirror focusing flexible motion mechanism |
| WO2019062211A1 (en) * | 2017-09-30 | 2019-04-04 | 杭州海康威视数字技术股份有限公司 | Imaging device and lens focusing method |
| CN109597263A (en) * | 2017-09-30 | 2019-04-09 | 杭州海康威视数字技术股份有限公司 | A kind of imaging device and a kind of lens focusing method |
| US11082601B2 (en) | 2017-09-30 | 2021-08-03 | Hangzhou Hikmicro Sensing Technology Co., Ltd. | Imaging device and lens focusing method |
| CN109597263B (en) * | 2017-09-30 | 2024-03-08 | 杭州海康微影传感科技有限公司 | Imaging device and lens focusing method |
| CN108073015A (en) * | 2017-12-08 | 2018-05-25 | 中国科学院长春光学精密机械与物理研究所 | A kind of high-precision linear focus adjusting mechanism for space camera |
| CN108073015B (en) * | 2017-12-08 | 2020-03-13 | 中国科学院长春光学精密机械与物理研究所 | High-precision linear focusing mechanism for space camera |
| CN110007422A (en) * | 2019-04-19 | 2019-07-12 | 东莞市普密斯精密仪器有限公司 | A kind of continuous zoom lens with linear motor and self-locking function |
| CN110007422B (en) * | 2019-04-19 | 2021-03-26 | 东莞市普密斯精密仪器有限公司 | Zoom lens with linear motor and self-locking function |
| WO2023231101A1 (en) * | 2022-05-30 | 2023-12-07 | 歌尔光学科技有限公司 | Lens module and electronic apparatus |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20121114 Effective date of abandoning: 20131023 |
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| AV01 | Patent right actively abandoned |
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| RGAV | Abandon patent right to avoid regrant |