CN103969786A - Varifocal mechanism of varifocal television system - Google Patents
Varifocal mechanism of varifocal television system Download PDFInfo
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- CN103969786A CN103969786A CN201410186882.5A CN201410186882A CN103969786A CN 103969786 A CN103969786 A CN 103969786A CN 201410186882 A CN201410186882 A CN 201410186882A CN 103969786 A CN103969786 A CN 103969786A
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Abstract
The invention relates to a varifocal mechanism of a varifocal television system and belongs to the technical field of optical focusing. The varifocal mechanism comprises a cylindrical guide rail, a zoom stepping motor, a zoom screw rod, a zoom compensation shaft end support, a compensation screw rod and a compensation stepping motor. The two ends of the cylindrical guide rail are fixed to a zoom component body and the zoom stepping motor and the compensation stepping motor are fixed to the two ends of a base of the zoom component body respectively; the zoom compensation shaft end support is fixed to the base of the zoom component body and located between the two stepping motors; one end of the zoom screw rod is connected with the zoom stepping motor through a coupling and the other end of the zoom screw rod is rotationally connected with the zoom compensation shaft end support; one end of the compensation screw rod is connected with the compensation stepping motor through a coupling and the other end of the compensation screw rod is rotationally connected with the zoom compensation shaft end support. The precise screw rods and the cylindrical guide rail are matched, stable movement of the system is achieved, and the tracking accuracy of the system is improved.
Description
Technical field
The present invention relates to optical focusing technical field, relate in particular to a kind of zoom mechanism of Size Zoom TV system.
Background technology
In the various test missions of modern test area, in order to monitor, trajectory and the running orbit of measurement target, commonly use the television system of continuous zoom.Its main advantage of continuous Size Zoom TV system is in the process of monitoring and measuring, can be according to the distance of tracking target and size, adjusting focal length numerical value, ensures tracking target size on monitor, makes target all the time in the visual field monitoring, measure.Size Zoom TV system is arranged in effective tracker, under peripheral hardware, artificial and digital designation, can completes the monitoring and measuring of target, provide effective miss distance data, complete measurement task.Size Zoom TV system had both been applicable to closely the catching of fast compact moving target (large visual field), and in being applicable to again, the catching at a distance of low-speed motion target (small field of view), is to focus apart from the irreplaceable a kind of measurement means of system.But zoom television system also has its shortcoming, in the process of continuous zoom, due to the feature of traditional cam driven sliding framework structure motion, make optical axis along with the displacement of zoom mechanism and compensation mechanism is being beated all the time, the size of optical axis jerk value directly affects the miss distance output valve of tracker like this, affects the tracking accuracy of system.
Summary of the invention
The object of this invention is to provide a kind of zoom mechanism of Size Zoom TV system, the cooperation that it adopts precision lead screw and cylindrical guide, has realized system easy motion, has improved the tracking accuracy of system.
To achieve these goals, technical scheme of the present invention is as follows:
A kind of zoom mechanism of Size Zoom TV system comprises that cylindrical guide, zoom stepper motor, zoom leading screw, zoom compensation axle head support, compensate leading screw and compensation stepper motor; The two ends of cylindrical guide are separately fixed at the two ends of the zoom article body of Size Zoom TV system, and zoom stepper motor and compensation stepper motor are separately fixed at the two ends of zoom article body base; Zoom compensation axle head is supported and fixed on zoom article body base, and between zoom stepper motor and compensation stepper motor; One end of zoom leading screw is connected with zoom stepper motor by shaft coupling, and the other end is connected with zoom compensation axle head support rotating; One end of compensation leading screw is connected with compensation stepper motor by shaft coupling, and the other end is connected with zoom compensation axle head support rotating.
Beneficial effect of the present invention is as follows:
1) cancel cam part and the body shaft parts of traditional mechanism, alleviated the resetting difficulty of system, reduced the processing cost of system;
2) version that adopts conventional precision lead screw and cylindrical guide to coordinate, can move quietly by high-precision flat Size Zoom TV system, and then has improved the tracking accuracy of system;
3) adopt stepper motor type of drive, can, by zoom curve and the compensated curve numerical value of the unclear point of computing machine correction image, make system obtain more satisfactory image in the overall process of zoom.
Brief description of the drawings
Fig. 1 is the zoom mechanism structural representation of Size Zoom TV system of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further details.
As shown in Figure 1, the zoom mechanism of Size Zoom TV system of the present invention comprises that cylindrical guide 2, zoom stepper motor 3, zoom leading screw 4, zoom compensation axle head support 6, compensate leading screw 8 and compensation stepper motor 9; The two ends of cylindrical guide 2 are separately fixed at the two ends of the zoom article body 1 of Size Zoom TV system, and zoom stepper motor 3 and compensation stepper motor 9 are separately fixed at the two ends of zoom article body 1 base; Zoom compensation axle head supports 6 and is fixed on zoom article body 1 base, and between zoom stepper motor 3 and compensation stepper motor 9; One end of zoom leading screw 4 is connected with zoom stepper motor 3 by shaft coupling, and the other end and zoom compensation axle head support 6 and be rotationally connected; One end of compensation leading screw 8 is connected with compensation stepper motor 9 by shaft coupling, and the other end and zoom compensation axle head support 6 and be rotationally connected.
One end of the zoom optics arrangement of mirrors 5 of Size Zoom TV system is connected with zoom leading screw 4 by screw, and the other end is connected with cylindrical guide 2 by unthreaded hole; One end of the compensate for optical arrangement of mirrors 7 of Size Zoom TV system is connected with compensation leading screw 8 by screw, and the other end is connected with cylindrical guide 2 by unthreaded hole.When use, when zoom stepper motor 3 and compensation stepper motor 9 are during according to the curvilinear motion of actual needs design, zoom leading screw 4 is driven according to the curve form of zoom stepper motor 3 and is moved by zoom stepper motor 3, and zoom optics arrangement of mirrors 5 is driven along the axially-movable of cylindrical guide 2 by zoom leading screw 4; Compensation leading screw 8 is driven according to the curve form of compensation stepper motor 9 and is moved by compensation stepper motor 9, compensate for optical arrangement of mirrors 7 is driven along the axially-movable of cylindrical guide 2 by compensation leading screw 8, zoom optics arrangement of mirrors 5 and compensate for optical arrangement of mirrors 7 move toward one another, complete the stable zoom process of zoom mechanism.
Because Size Zoom TV system exists the mismachining tolerance of optical element and the error of system assembling, in omnidistance use procedure, there is the not fogging clear problem of indivedual focal length points.Focus adjusting mechanism of the present invention adopts stepper motor type of drive, can come by the operation curve of computer-controlled stepper motor zoom curve and the compensated curve numerical value of the unclear point of correction image, and then make system obtain more satisfactory image in the overall process of zoom.
Claims (1)
1. the zoom mechanism of a Size Zoom TV system, it is characterized in that, this zoom mechanism comprises that cylindrical guide (2), zoom stepper motor (3), zoom leading screw (4), zoom compensation axle head support (6), compensation leading screw (8) and compensation stepper motor (9); The two ends of cylindrical guide (2) are separately fixed at the two ends of the zoom article body (1) of Size Zoom TV system, and zoom stepper motor (3) and compensation stepper motor (9) are separately fixed at the two ends of zoom article body (1) base; Zoom compensation axle head supports (6) and is fixed on zoom article body (1) base, and is positioned between zoom stepper motor (3) and compensation stepper motor (9); One end of zoom leading screw (4) is connected with zoom stepper motor (3) by shaft coupling, and the other end and zoom compensation axle head support (6) and be rotationally connected; One end of compensation leading screw (8) is connected with compensation stepper motor (9) by shaft coupling, and the other end and zoom compensation axle head support (6) and be rotationally connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410186882.5A CN103969786A (en) | 2014-05-05 | 2014-05-05 | Varifocal mechanism of varifocal television system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410186882.5A CN103969786A (en) | 2014-05-05 | 2014-05-05 | Varifocal mechanism of varifocal television system |
Publications (1)
| Publication Number | Publication Date |
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| CN103969786A true CN103969786A (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410186882.5A Pending CN103969786A (en) | 2014-05-05 | 2014-05-05 | Varifocal mechanism of varifocal television system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501964A (en) * | 2014-12-30 | 2015-04-08 | 浙江兆晟科技有限公司 | High-precision and impact-resistant electric infrared thermal imaging device |
| CN105353493A (en) * | 2015-12-01 | 2016-02-24 | 中国航空工业集团公司洛阳电光设备研究所 | Variable magnification compensation device of continuous zooming thermal imaging instrument and processing technology |
| CN106908929A (en) * | 2017-04-28 | 2017-06-30 | 中山联合光电科技股份有限公司 | A kind of lens construction of application shaft coupling |
| CN107390341A (en) * | 2017-09-12 | 2017-11-24 | 北京航宇智通技术有限公司 | A kind of high-precision compound positioning device for lens installation |
| CN109188645A (en) * | 2018-10-16 | 2019-01-11 | 桂林弗克斯光电仪器有限公司 | Two groups of linkage automatic variable power lens of bi-motor full closed loop control |
| CN110673338A (en) * | 2019-10-15 | 2020-01-10 | 河南平原光电有限公司 | Method for reducing optical axis jumping quantity of zoom lens under high and low temperature |
| CN110727077A (en) * | 2019-10-09 | 2020-01-24 | 中国航空工业集团公司洛阳电光设备研究所 | Centroid driving focusing mechanism based on flexible hinge |
| 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 |
| CN117687168A (en) * | 2024-02-01 | 2024-03-12 | 吉林省巨程智造光电技术有限公司 | Aspherical lens device for space signal transmission |
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| JP2011075601A (en) * | 2009-09-29 | 2011-04-14 | Fujifilm Corp | System for correcting temperature compensation value and method for controlling operation of the same |
| CN103364933A (en) * | 2013-07-22 | 2013-10-23 | 中国科学院西安光学精密机械研究所 | Digital cam continuous zooming system |
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2014
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Patent Citations (4)
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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 |
| US20020003962A1 (en) * | 2000-07-06 | 2002-01-10 | Park Se Woong | Control method of CCD camera |
| JP2011075601A (en) * | 2009-09-29 | 2011-04-14 | Fujifilm Corp | System for correcting temperature compensation value and method for controlling operation of the same |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501964A (en) * | 2014-12-30 | 2015-04-08 | 浙江兆晟科技有限公司 | High-precision and impact-resistant electric infrared thermal imaging device |
| CN105353493A (en) * | 2015-12-01 | 2016-02-24 | 中国航空工业集团公司洛阳电光设备研究所 | Variable magnification compensation device of continuous zooming thermal imaging instrument and processing technology |
| CN105353493B (en) * | 2015-12-01 | 2018-01-09 | 中国航空工业集团公司洛阳电光设备研究所 | The zoom compensation device and its processing technology of a kind of continuous vari-focus thermal imaging system |
| CN106908929A (en) * | 2017-04-28 | 2017-06-30 | 中山联合光电科技股份有限公司 | A kind of lens construction of application shaft coupling |
| CN107390341A (en) * | 2017-09-12 | 2017-11-24 | 北京航宇智通技术有限公司 | A kind of high-precision compound positioning device for lens installation |
| CN109188645A (en) * | 2018-10-16 | 2019-01-11 | 桂林弗克斯光电仪器有限公司 | Two groups of linkage automatic variable power lens of bi-motor full closed loop control |
| CN109188645B (en) * | 2018-10-16 | 2024-05-07 | 桂林弗克斯光电仪器有限公司 | Double-motor full-closed-loop controlled two-group linkage automatic zoom lens |
| CN110727077A (en) * | 2019-10-09 | 2020-01-24 | 中国航空工业集团公司洛阳电光设备研究所 | Centroid driving focusing mechanism based on flexible hinge |
| CN110673338A (en) * | 2019-10-15 | 2020-01-10 | 河南平原光电有限公司 | Method for reducing optical axis jumping quantity of zoom lens under high and low temperature |
| 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 |
| CN117687168A (en) * | 2024-02-01 | 2024-03-12 | 吉林省巨程智造光电技术有限公司 | Aspherical lens device for space signal transmission |
| CN117687168B (en) * | 2024-02-01 | 2024-04-19 | 吉林省巨程智造光电技术有限公司 | Aspherical lens device for space signal transmission |
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Application publication date: 20140806 |