CN2426157Y - Program controlled high precision zoom lens - Google Patents
Program controlled high precision zoom lens Download PDFInfo
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- CN2426157Y CN2426157Y CN 99232147 CN99232147U CN2426157Y CN 2426157 Y CN2426157 Y CN 2426157Y CN 99232147 CN99232147 CN 99232147 CN 99232147 U CN99232147 U CN 99232147U CN 2426157 Y CN2426157 Y CN 2426157Y
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- compensation group
- position transducer
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Abstract
The utility model relates to a program controlled high precision zoom device, which belongs to the technical field of optics. The utility model is characterized in that a closed loop control focusing mechanism is commonly composed of a programmable controller, a drive motor, a drive mechanism, a position sensor, a zoom group and a compensation group, and the accurate displacement of the zoom group and the compensation group and the real-time output of focal ratio are realized. Compared with the general level of the prior art, the zoom precision which achieves 0.002 millimeter is imprby 50-60 times, and the utility model solves the problems of the existing zoom device that the zoom precision is low, weight and volume are large, the focal ratio can not be output in a real-time way, etc. The utility model can be extensively used in a TV tracking measurement system for over-distance targets.
Description
The utility model belongs to optical technical field, relates to a kind of improved optical instrument.
The varifocal device is that focal length can change within the specific limits and keeps the motionless optical instrument of the face of resembling, this device to be widely used in super target television tracking measurement system far away.Present varifocal device is made up of preceding fixedly group, zoom group, back fixing group three parts, change focal length by the spacing that changes lens combination, concrete mode is to utilize Electric Machine Control machinery cam rotation, make become doubly group along guide rail move linearly, the compensation group does nonlinear motion along guide rail.For example the patent No. of on April 29th, 1998 bulletin is that 96239488.2 Chinese utility model patent instructions discloses a kind of like this varifocal device.This shortcoming of the varifocal device of mechanical cam of utilizing is: the zoom precision is low; Accurately processing is very difficult to cam to press the cam curve equation; Device feature requires to adopt cast iron materials with the raising wearing quality, thereby the weight and volume of zoom lens control device is bigger; In the zoom process, can not provide focal length value in real time.
The purpose of this utility model is to adopt parts such as Programmable Logic Controller, drive motor, driving mechanism, position transducer, and a kind of program control high precision varifocal device of, handling ease littler, in light weight than prior art zoom precision height, volume is provided.
The purpose of this utility model can reach by following measure: it is by Programmable Logic Controller, two drive motor, two driving mechanisms, two position transducers and driven the change that moves linearly along guide rail and doubly organize and driven the compensation group of doing nonlinear motion along guide rail and constitute the closed-loop control focus adjusting mechanism jointly, Programmable Logic Controller is according to the target range information of input, by the cam curve equation that optical design provides, control two drive motor and move change doubly a group and a compensation group by two driving mechanisms respectively; Respectively the change in location that becomes times group and compensation group is done to detect in real time by two position transducers simultaneously, and this shift value is fed back Programmable Logic Controller in real time; Programmable Logic Controller determines whether that according to the shift value of feedback continuation drives change times group and the compensation group moves, and exports focal length value in real time.
The purpose of this utility model can also reach by following measure: driving mechanism connects to form by two nuts, two lead rail axis (also being bolt simultaneously), two gear reduction boxs with the mechanical fixation that becomes a group doubly, compensation group, two position transducers move gratings, two drive motor drive two lead rail axis (being bolt) by two gear reduction boxs respectively and rotate, made fixedly connected to become two nuts of group doubly or compensation group on two lead rail axis, to move respectively, focused.
The purpose of this utility model can also reach by following measure: the nut of two driving mechanisms is doubly organized with change with the moving grating of two position transducers respectively, the compensation group is connected as mechanical fixation, becoming doubly, the moving grating that drives two position transducers respectively that moves of group, compensation group moves, make the grating of deciding of two moving gratings and two fixing position transducers produce Moire fringe, variable quantity according to Moire fringe, position transducer detects the displacement that becomes times group and compensation group, realizes the real-time detection of change in location.
The purpose of this utility model can also reach by following measure: fixation hollow body shaft in seal case, and become times group and compensation group and be arranged in the central cavity of body shaft, two gathering sills along body shaft move respectively; Becoming doubly group, compensation group is connected with the nut mechanical fixation of driving mechanism separately respectively, two nuts are threaded with two lead rail axis (being bolt) of driving mechanism respectively, and directly fixing with the moving grating of two position transducers respectively, two lead rail axis are connected with two drive motor that are controlled by Programmable Logic Controller by two gear reduction boxs respectively.
The purpose of this utility model can also reach by following measure: position transducer of the present utility model is the micrometric displacement grating sensor.
The utility model has removed mechanical cam structure of the prior art, through facts have proved, its zoom precision can reach 0.002 millimeter, improves 50-60 doubly than prior art mean level (the zoom precision is the 0.1-0.12 millimeter), reaches the high precision that the processing equipment cam is difficult to reach; Realize the real-time output of focal length value simultaneously, be beneficial to measurement; And make one-piece construction simpler, and volume is littler, and weight is lighter, and processing and fabricating is easier.
Description of drawings:
Fig. 1 is a principle of work block diagram of the present utility model.
Fig. 2 is a physical construction front view of the present utility model.
Fig. 3 is a physical construction side view of the present utility model.
The utility model will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, Programmable Logic Controller is according to the target range information of input, and the controlling and driving motor moves change doubly a group and a compensation group by driving mechanism, and position transducer is doubly organized by change and the compensation group is made position probing, with its displacement information feedback Programmable Logic Controller.
As shown in Figures 2 and 3, in seal case 3 of the present utility model, fix a hollow body axle 4, become doubly organize 1 and compensation group 2 be positioned at the central cavity 15 of body shaft 4, the gathering sill 16,17 along body shaft 4 moves respectively.Become and doubly to organize 1 and be connected with nut 5 mechanical fixation of driving mechanism, nut 5 is threaded with lead rail axis (bolt) 13, the moving grating of nut 5 direct fixed position sensors 7, lead rail axis 13 is connected with the drive motor 9 that is controlled by Programmable Logic Controller by gear reduction box 11.Compensation group 2 is connected with nut 6 mechanical fixation of driving mechanism, nut 6 is threaded with lead rail axis (bolt) 14, the moving grating of nut 6 direct fixed position sensors 8, lead rail axis 14 is connected with the drive motor 10 that is controlled by Programmable Logic Controller by gear reduction box 12.
During work, Programmable Logic Controller is according to the target range information of input, the cam curve equation that provides by optical design, controlling and driving motor 9 drives lead rail axis 13 by gear reduction box 11 and rotates, the nut 5 that is enclosed within on the lead rail axis 13 is moved on lead rail axis 13, nut 5 is doubly organized 1 mechanical fixation with change and is connected, and therefore becomes doubly to organize 1 generation displacement.
Simultaneously, Programmable Logic Controller is according to the target range information of input, the cam curve equation that provides by optical design, controlling and driving motor 10 drives lead rail axis 14 by gear reduction box 12 and rotates, the nut 6 that is enclosed within on the lead rail axis 14 is moved on lead rail axis 14, nut 6 is organized 2 mechanical fixation with compensation and is connected, so compensation group 2 produces displacement.
Become doubly organize 1 and the compensation group 2 moving grating that drives position transducers 7,8 move, produce Moire fringe with the grating of deciding of position transducer 7,8, variable quantity according to Moire fringe, position transducer 7,8 is realized doubly organizing 1 and the real-time detection of the change in location of compensation group 2 to becoming, and with this shift value feedback Programmable Logic Controller, Programmable Logic Controller according to this in real time shift value of feedback whether reach needed shift value determine change doubly organize 1 and the continuation of compensation group 2 whether move, thereby formation closed-loop control, finish the focusing process, and by Programmable Logic Controller output focal length value.
Implementing better scheme of the present utility model is: press the utility model principle of work and structural drawing Design and Machining, position transducer is selected the micrometric displacement grating sensor for use, and the Control Software of Programmable Logic Controller designs according to the difference of cam curve equation parameter.
Claims (5)
1. program control high precision varifocal device, comprise and be subjected to Electric Machine Control doubly to organize (1) and make the compensation group (2) of nonlinear motion along guide rail along the change that guide rail moves linearly, it is characterized in that: it is by Programmable Logic Controller, drive motor (9,10), driving mechanism, position transducer (7,8) doubly organize with change, the compensation group constitutes the closed-loop control focus adjusting mechanism jointly, Programmable Logic Controller is according to the target range information of input, by the cam curve equation that optical design provides, difference controlling and driving motor (9,10) move doubly group (1) and a compensation group (2) of change by driving mechanism; Do to detect in real time to becoming the change in location of doubly organizing (1) and compensation group (2) respectively by position transducer (7,8) simultaneously, and this shift value is fed back Programmable Logic Controller in real time; Programmable Logic Controller determines whether that according to the shift value of feedback continuation drives change times group (1) and compensation group (2) is mobile, and exports focal length value in real time.
2. program control high precision varifocal device as claimed in claim 1, it is characterized in that: the mechanical fixation of group (1), a compensation group (2), the moving grating of position transducer (7,8) connects to form driving mechanism by nut (5,6), lead rail axis (13,14), gear reduction box (11,12) with becoming doubly, drive motor (9,10) drives lead rail axis (13,14) by gear reduction box (11,12) respectively and rotates, made fixedly connected to become the nut (5,6) of group (1) doubly or compensation group (2) to be gone up in lead rail axis (1 3,14) respectively and moved, focused.
3. program control high precision varifocal device as claimed in claim 1, it is characterized in that: the nut (5 of driving mechanism, 6) respectively with position transducer (7,8) moving grating and change be group (1) doubly, compensation group (2) mechanical fixation connects, become doubly group (1), the mobile drive position transducer (7 of compensation group (2), 8) moving grating moves, make grating and fixing position transducer (7,8) the grating of deciding produces Moire fringe, variable quantity according to Moire fringe, position transducer (7,8) detect the displacement that becomes times group (1) and compensation group (2), realize the real-time detection of change in location.
4. program control high precision varifocal device as claimed in claim 1, it is characterized in that: fixation hollow body shaft (4) in seal case (3), become times group (1) and compensation group (2) and be arranged in the central cavity (15) of body shaft (4), the gathering sill (16,17) along body shaft (4) moves respectively; Becoming doubly, group (1), compensation group (2) are connected with nut (5, the 6) mechanical fixation of driving mechanism respectively, nut (5,6) is threaded with the lead rail axis (13,14) of driving mechanism respectively, nut (5,6) is directly fixing with the moving grating of position transducer (7,8) respectively, and lead rail axis (13,14) is connected by gear reduction box (11,12) and the drive motor that is controlled by Programmable Logic Controller (9,1O) respectively.
5. as any one described program control high precision varifocal device in the claim 1 to 4, it is characterized in that: its position transducer (7,8) is the micrometric displacement grating sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99232147 CN2426157Y (en) | 1999-07-19 | 1999-07-19 | Program controlled high precision zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99232147 CN2426157Y (en) | 1999-07-19 | 1999-07-19 | Program controlled high precision zoom lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2426157Y true CN2426157Y (en) | 2001-04-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99232147 Expired - Fee Related CN2426157Y (en) | 1999-07-19 | 1999-07-19 | Program controlled high precision zoom lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2426157Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7499636B2 (en) | 2005-01-26 | 2009-03-03 | Asia Optical Co., Inc | Method for automatically coordinating flash intensity and camera system as the same |
| WO2010015149A1 (en) * | 2008-08-06 | 2010-02-11 | 香港理工大学 | Zoom lens system |
| CN102096333A (en) * | 2010-12-27 | 2011-06-15 | 中国科学院光电技术研究所 | Variable rectangular window adjusting mechanism |
| CN102929301A (en) * | 2012-11-26 | 2013-02-13 | 中国科学院长春光学精密机械与物理研究所 | Dynamic balance control device for telescopic system of optical measurement equipment |
| CN105319829A (en) * | 2015-12-04 | 2016-02-10 | 张家港斯克斯精密机械科技有限公司 | Device for measuring camera lens focal length focusing parameters |
| CN105425373A (en) * | 2015-12-28 | 2016-03-23 | 中国电子科技集团公司第十一研究所 | Infrared continuous zooming optical system |
| CN107894644A (en) * | 2017-11-25 | 2018-04-10 | 中国科学院长春光学精密机械与物理研究所 | Airborne optical lens focusing mechanism |
| CN108254127A (en) * | 2018-01-18 | 2018-07-06 | 西安应用光学研究所 | A kind of big zoom ratio Zoom sensor barycenter device for controlling dynamically and method |
| 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 |
| CN111650746A (en) * | 2020-05-11 | 2020-09-11 | 中国科学院西安光学精密机械研究所 | Method for improving focusing precision of zoom optical system |
-
1999
- 1999-07-19 CN CN 99232147 patent/CN2426157Y/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7499636B2 (en) | 2005-01-26 | 2009-03-03 | Asia Optical Co., Inc | Method for automatically coordinating flash intensity and camera system as the same |
| WO2010015149A1 (en) * | 2008-08-06 | 2010-02-11 | 香港理工大学 | Zoom lens system |
| CN101644815B (en) * | 2008-08-06 | 2012-06-13 | 香港理工大学 | Zoom lens system |
| CN102096333A (en) * | 2010-12-27 | 2011-06-15 | 中国科学院光电技术研究所 | Variable rectangular window adjusting mechanism |
| CN102096333B (en) * | 2010-12-27 | 2012-11-21 | 中国科学院光电技术研究所 | Variable rectangular window adjusting mechanism |
| CN102929301A (en) * | 2012-11-26 | 2013-02-13 | 中国科学院长春光学精密机械与物理研究所 | Dynamic balance control device for telescopic system of optical measurement equipment |
| CN102929301B (en) * | 2012-11-26 | 2015-02-18 | 中国科学院长春光学精密机械与物理研究所 | Dynamic balance control device for telescopic system of optical measurement equipment |
| CN105319829B (en) * | 2015-12-04 | 2018-08-10 | 张家港斯克斯精密机械科技有限公司 | A kind of device measuring camera lens focal length Focusing parameter |
| CN105319829A (en) * | 2015-12-04 | 2016-02-10 | 张家港斯克斯精密机械科技有限公司 | Device for measuring camera lens focal length focusing parameters |
| CN105425373A (en) * | 2015-12-28 | 2016-03-23 | 中国电子科技集团公司第十一研究所 | Infrared continuous zooming optical system |
| CN107894644A (en) * | 2017-11-25 | 2018-04-10 | 中国科学院长春光学精密机械与物理研究所 | Airborne optical lens focusing mechanism |
| CN107894644B (en) * | 2017-11-25 | 2019-11-05 | 中国科学院长春光学精密机械与物理研究所 | Airborne optical lens focusing mechanism |
| CN108254127A (en) * | 2018-01-18 | 2018-07-06 | 西安应用光学研究所 | A kind of big zoom ratio Zoom sensor barycenter device for controlling dynamically and method |
| CN108254127B (en) * | 2018-01-18 | 2020-05-19 | 西安应用光学研究所 | Dynamic control device and method for mass center of large zoom ratio zoom sensor |
| 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 |
| CN111650746A (en) * | 2020-05-11 | 2020-09-11 | 中国科学院西安光学精密机械研究所 | Method for improving focusing precision of zoom optical system |
| CN111650746B (en) * | 2020-05-11 | 2021-10-15 | 中国科学院西安光学精密机械研究所 | Method for improving focusing precision of zoom optical system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |