CN112578523A - Optical filter switching device - Google Patents
Optical filter switching device Download PDFInfo
- Publication number
- CN112578523A CN112578523A CN202011616936.9A CN202011616936A CN112578523A CN 112578523 A CN112578523 A CN 112578523A CN 202011616936 A CN202011616936 A CN 202011616936A CN 112578523 A CN112578523 A CN 112578523A
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- China
- Prior art keywords
- optical filter
- subassembly
- frame
- switching device
- limit switch
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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
- G02B7/006—Filter holders
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C1/00—Measuring angles
- G01C1/02—Theodolites
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optics & Photonics (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
- Blocking Light For Cameras (AREA)
Abstract
The application provides an optical filter auto-change over device, including frame, drive assembly, optical filter subassembly, spacing subassembly, the optical filter subassembly is installed through the pivot in the frame, the optical filter subassembly can be followed frame horizontal and longitudinal movement, the drive assembly with spacing subassembly is all installed in the frame, the drive assembly passes through gear drive the optical filter subassembly round the pivot motion, spacing subassembly control the rotation angle of optical filter subassembly. The optical filter switching device is simple and compact in structure and capable of meeting the requirements of a theodolite optical system on dimming.
Description
Technical Field
The invention relates to the technical field of dimming elements of optical equipment, in particular to an optical filter switching device.
Background
In the process of measuring a target range, the optical filter is used as a light adjusting element in an optical system of the theodolite, and the switching accuracy of the optical filter directly influences the measuring result. At present, most of optical filter switches are in a linear switching structure, the structure is easy to position and high in precision, but the optical filter switches in a large space, so that the span of a theodolite tracking frame is increased, the whole weight and the cost are increased, and meanwhile, the system rigidity is reduced. The optical filter switching structure described in patent CN108957673A adopts a switching method of rotating a polygon dense disc, and although the structure is compact, the processing of the polygon dense disc is complicated, and it is difficult to realize high-precision positioning. The optical filter switching structure disclosed in patent CN107526145A adopts a rotary switching mode, and has a compact structure, but because the motor is directly connected to the density disk through the flange, the axis wobble error of the motor directly reflects on the density disk, which causes an optical path difference in the switching process of each optical filter, and cannot ensure the switching precision. In addition, the direct current motor is of a structure that the servo motor or the stepping motor has defects, the servo motor is high in cost and small in rotational inertia, and a situation that a servo system is difficult to control due to the fact that the rotational inertia of a load is too large when a multistage optical filter is used cannot guarantee switching precision exists. The driving torque of the stepping motor is small, the load capacity is low, the working noise is high, the user experience is influenced, and meanwhile, the phenomenon that the switching precision cannot be guaranteed due to the fact that the stepping motor loses steps can be caused by the fact that the stepping motor drives the density disc to rotate by means of pulse counting.
Disclosure of Invention
Based on this, for solving among the prior art when the light filter switches the precision low, switching mechanism is huge, and when the multistage light filter switches the load great, the servo system that the motor drive capacity is not enough or motor inertia is not enough is difficult to control's problem for the selection, provides a compact light filter auto-change over device of accurate positioning, makes its simple structure reliable, can satisfy theodolite optical system to the demand of adjusting luminance.
The application provides an optical filter switching device, which comprises a frame, a transmission component, an optical filter component and a limiting component,
the optical filter subassembly is installed through the pivot in the frame, the optical filter subassembly can be followed the frame is horizontal and longitudinal movement, the transmission subassembly with spacing subassembly is all installed in the frame, the transmission subassembly passes through gear drive the optical filter subassembly round the pivot motion, spacing subassembly control the rotation angle of optical filter subassembly.
Preferably, the transmission assembly comprises a transmission gear, a direct current motor, a planet gear reducer and a motor base, wherein the transmission gear is directly connected with the direct current motor and the planet gear reducer and is installed on the rack through the motor base.
Preferably, the optical filter assembly comprises a density disc, an optical filter and a pressing ring, a concave spigot is arranged at the center of the density disc and is precisely matched with the convex spigot of the rotating shaft,
the circumference of the density disc is uniformly provided with a plurality of fixing holes, the optical filter is arranged in the corresponding fixing hole through the pressing ring, and the outer edge of the density disc is of a gear structure and is meshed with the transmission gear.
Preferably, the limit assembly comprises a limit baffle and a limit switch assembly,
the limiting blocking pieces are fixed in grooves of the density disc, the grooves are uniformly distributed on the density disc, and the number of the grooves is consistent with that of the optical filters;
the limit switch assembly comprises a zero position switch, a limit switch, a zero position switch seat, a limit switch seat and an adjusting seat, wherein the limit switch and the zero position switch are respectively fixed on the limit switch seat and the zero position switch seat, the limit switch seat is fixed on the zero position switch seat through a waist hole, the zero position switch seat is fixed on the adjusting seat through the waist hole, and the adjusting seat is fixed on the rack through the waist hole.
Preferably, the rotating shaft is stepped.
Preferably, the motor base is fixed on the frame through a spigot.
Preferably, the transmission gear is connected with a direct current motor shaft through a pin shaft.
Preferably, the limiting blocking piece and the density disc are of an integral structure.
Preferably, the transmission ratio between the transmission gear and the density disc is adjustable.
The beneficial effect of this application: the application provides a filter auto-change over device adopts revolution mechanic, has overcome traditional straight line and has switched the structure bulky and make theodolite tracking frame span increase, the defect that the bulk rigidity descends, simple structure is compact. Meanwhile, the rotating shaft of the density disk is centered through a bearing fixed on the upper-layer rack, so that the optical path consistency in the switching process of all the optical filters in the density disk is ensured, and the defect of optical path difference caused by the optical axis shake of the optical filters in the process that the motor and the density disk of the traditional switching device are directly connected through a flange and switched is overcome. In addition, by means of a driving mode of the direct-current motor and the planetary gear reducer, the problems that a small servo system for driving the motor by using the servo motor to drive the motor is difficult to control and the load capacity of a stepping motor driving belt is weak in the traditional switching device are solved, the multistage optical filter can be driven, and meanwhile, in order to eliminate errors caused by the backlash of the planetary gear reducer, the precision requirement is met by adjusting the transmission ratio between the transmission gear and the density disc, or the switching precision is improved by selecting the backlash eliminating gear. This application can realize accurate positioning through the mode of zero-position switch and limit switch combination, and when zero-position switch provided the zero-position, for the signal of direct current motor speed reduction, make the motor can be accurate braking when spacing separation blade contacts limit switch to guarantee the light filter and switch over the precision. The optical filter switching device overcomes the defects in the prior art, is simple and compact in structure, and can meet the requirement of a theodolite optical system on dimming.
Drawings
FIG. 1 is a front view of a filter switching device according to the present application;
FIG. 2 is a side view of a filter switching device according to the present application;
fig. 3 is a sectional view a-a of fig. 1.
The meaning of the reference symbols in the drawings is:
1-upper layer machine frame; 2-a lower layer frame; 3-a rotating shaft; 4-a bearing; 5-a transmission gear; 6-a direct current motor; 7-a planetary gear reducer; 8-a motor base; 9-density disc; 10-an optical filter; 11-a limit stop sheet; 12-a zero position switch; 13-limit switch; 14-zero position switch base; 15-limit switch base; 16-an adjusting seat; 17-pressing ring; 18-a frame; 19-a transmission assembly; 20-an optical filter assembly; 21-a spacing assembly.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The application provides a light filter switching device, which comprises a frame 18, a transmission assembly 19, a light filter assembly 20 and a limiting assembly 21;
the frame includes upper frame 1, lower floor's frame 2, the light filter is installed through pivot 3 on the upper frame 1, pivot 3 is the echelonment structure, with 4 inner rings of bearing are connected, 4 outer rings of bearing are fixed on upper frame 1, the position concentricity requirement that upper frame corresponds and arranges bearing 4 is very high, guarantees that its axis of light filter subassembly can not incline when the gyration.
The upper-layer frame 1 is provided with a transverse waist hole, and the lower-layer frame 2 is provided with a longitudinal waist hole which are respectively used for adjusting the transverse position and the longitudinal position of the optical filter component.
The transmission assembly comprises a transmission gear 5, a direct current motor 6, a planetary gear reducer 7 and a motor base 8, wherein the transmission gear 5 is directly connected with the direct current motor and the planetary gear reducer 7, and the motor base 8 is installed on the upper-layer rack 1.
The motor base 8 is fixed on the upper layer rack 1 through a spigot, and the transmission gear 5 is connected with a motor shaft through a pin shaft.
The optical filter assembly comprises a density disc 9, an optical filter 10 and a pressing ring 17, wherein a plurality of mounting holes are uniformly arranged on the density disc 9, and the optical filter 10 is fixed in the corresponding mounting hole through the pressing ring 17. The density disc 9 is positioned on the convex spigot of the rotating shaft through the concave spigot, so that the rotation centers of the density disc 9 and the rotating shaft 3 are consistent.
The limiting assembly comprises a limiting baffle plate 11 and a limiting switch assembly,
the density disk 9 is uniformly provided with a plurality of grooves, the number of the grooves is consistent with that of the optical filter 10, the limiting blocking piece 11 is fixed in the groove of the density disk 9 through a waist hole, the position of the limiting blocking piece 11 in the circumferential direction can be adjusted through the waist hole, in addition, the limiting blocking piece 11 can also be integrated with the density disk into a whole, and the density disk is formed by numerical control machining without adjustment, so that the accurate stop position can be ensured.
The limit switch assembly comprises a zero position switch 12, a limit switch 13, a zero position switch seat 14 and a limit switch seat 15, wherein the limit switch 13 and the zero position switch 12 are respectively fixed on the limit switch seat 15 and the zero position switch seat 14, the limit switch seat 15 is fixed on the zero position switch seat 14 through a waist hole, and the radial direction position of the limit switch 13 can be adjusted through the waist hole. The zero position switch seat 14 is fixed on the adjusting seat 16 through a waist hole, the radial position of the zero position switch 12 can be adjusted through the waist hole, the adjusting seat 16 is fixed on the upper layer rack 1 through the waist hole, and the axial relative position between the limit switch 13 and the limit baffle plate 11 can be adjusted through the waist hole. The zero position switch provides a zero position signal and simultaneously provides a speed reduction signal of the direct current motor 6, the limit switch 13 limits the stop position of the optical filter, when the zero position switch 12 is passed, the direct current motor 6 starts to reduce speed, when the position of the limit switch 13 is reached, the direct current motor 6 can accurately stop, according to the use requirement, a brake structure can be arranged at the tail of the direct current motor 6, and the stability and reliability of the optical filter switching device can be further guaranteed.
The optical filter switching device provided by the embodiment of the application has the specific working process that the direct current motor 6 drives the transmission gear 5, the transmission gear 5 drives the density disc 9, and the limiting assembly controls the rotating angle of the density disc 9, so that required optical filters are switched to an optical path in sequence, and meanwhile, the direct current motor 6 can be regulated according to the switching time requirement of each optical filter, and the specific use working condition is met.
The application provides a filter auto-change over device adopts revolution mechanic, has overcome traditional straight line and has switched the structure bulky and make theodolite tracking frame span increase, the defect that the bulk rigidity descends, simple structure is compact. Meanwhile, the rotating shaft of the density disk is centered through a bearing fixed on the upper-layer rack, so that the optical path consistency in the switching process of all the optical filters in the density disk is ensured, and the defect of optical path difference caused by the optical axis shake of the optical filters in the process that the motor and the density disk of the traditional switching device are directly connected through a flange and switched is overcome. In addition, by means of a driving mode of the direct-current motor and the planetary gear reducer, the problems that a servo motor is used for driving a small-inertia servo system of the motor to be difficult to control and a stepping motor is used for driving a belt to be weak in load capacity in a traditional switching device are solved, the multistage optical filter can be driven, meanwhile, in order to eliminate errors caused by tooth gaps of the planetary gear reducer, the precision requirement can be met by adjusting the transmission ratio between the transmission gear and the density disc, or the switching precision can be improved by selecting a clearance eliminating gear. The mode through zero-position switch and limit switch combination can realize accurate positioning, and the signal of giving direct current motor speed reduction when the zero-position switch provides the zero-position makes the motor can accurate braking when spacing separation blade contacts limit switch to guarantee the light filter and switch over the precision. The optical filter switching device overcomes the defects in the prior art, is simple and compact in structure, and can meet the requirement of a theodolite optical system on dimming.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. An optical filter switching device is characterized by comprising a frame, a transmission component, an optical filter component and a limiting component,
the optical filter subassembly is installed through the pivot in the frame, the optical filter subassembly can be followed the frame is horizontal and longitudinal movement, the transmission subassembly with spacing subassembly is all installed in the frame, the transmission subassembly passes through gear drive the optical filter subassembly round the pivot motion, spacing subassembly control the rotation angle of optical filter subassembly.
2. The optical filter switching device according to claim 1, wherein the transmission assembly comprises a transmission gear, a dc motor, a planetary gear reducer, and a motor base, and the transmission gear is directly connected to the dc motor and the planetary gear reducer and is mounted on the frame through the motor base.
3. The device according to claim 2, wherein the filter assembly comprises a density disk, a filter, and a pressing ring, a female notch is provided at a center of the density disk and is precisely matched with the male notch of the rotation shaft,
the circumference of the density disc is uniformly provided with a plurality of fixing holes, the optical filter is arranged in the corresponding fixing hole through the pressing ring, and the outer edge of the density disc is of a gear structure and is meshed with the transmission gear.
4. The optical filter switching device according to claim 3, wherein the limiting assembly comprises a limiting baffle and a limiting switch assembly,
the limiting blocking pieces are fixed in grooves of the density disc, the grooves are uniformly distributed on the density disc, and the number of the grooves is consistent with that of the optical filters;
the limit switch assembly comprises a zero position switch, a limit switch, a zero position switch seat, a limit switch seat and an adjusting seat, wherein the limit switch and the zero position switch are respectively fixed on the limit switch seat and the zero position switch seat, the limit switch seat is fixed on the zero position switch seat through a waist hole, the zero position switch seat is fixed on the adjusting seat through the waist hole, and the adjusting seat is fixed on the rack through the waist hole.
5. The optical filter switching apparatus according to claim 1, wherein the rotation axis is stepped.
6. The apparatus according to claim 2, wherein the motor base is fixed to the frame through a seam allowance.
7. The optical filter switching device according to claim 2, wherein the transmission gear is connected to a shaft of the dc motor through a pin.
8. The filter switching device of claim 4 wherein said stop tab is integral with said density disk.
9. The filter switching apparatus of claim 3 wherein a gear ratio between said drive gear and said density disk is adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011616936.9A CN112578523A (en) | 2020-12-30 | 2020-12-30 | Optical filter switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011616936.9A CN112578523A (en) | 2020-12-30 | 2020-12-30 | Optical filter switching device |
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| Publication Number | Publication Date |
|---|---|
| CN112578523A true CN112578523A (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011616936.9A Pending CN112578523A (en) | 2020-12-30 | 2020-12-30 | Optical filter switching device |
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| CN (1) | CN112578523A (en) |
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| US6567225B1 (en) * | 2001-09-17 | 2003-05-20 | Artine B. Derian | Spectrum filter wheel |
| US6605916B1 (en) * | 1999-04-12 | 2003-08-12 | Canon Kabushiki Kaisha | Rotation position control apparatus of rotary element of filter |
| CN101806947A (en) * | 2010-03-25 | 2010-08-18 | 谭懋 | Rotation switching method and device of multiple optical filters of imaging sensor |
| CN102689085A (en) * | 2012-06-07 | 2012-09-26 | 中国东方电气集团有限公司 | Autonomous mobile dithering hot wire tungsten-inert-gas (TIG) welding robot system for welding large-sized precision equipment |
| CN202720183U (en) * | 2012-09-10 | 2013-02-06 | 重庆大学 | Excitation light source converting mechanism for lung cancer exhaled air detection |
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| CN104793449A (en) * | 2014-01-22 | 2015-07-22 | 深圳市维安华科技有限公司 | Filter switching device and switching method thereof |
| CN106444229A (en) * | 2016-11-23 | 2017-02-22 | 东莞市维斗科技股份有限公司 | Multi-filter IR-CUT switcher |
| CN107526145A (en) * | 2017-07-27 | 2017-12-29 | 中国科学院长春光学精密机械与物理研究所 | A kind of optical filter switching structure and the optical instrumentation with the structure |
| CN109444441A (en) * | 2018-12-19 | 2019-03-08 | 江苏鸿恩医疗器械有限公司 | Automatic coagulation analyzer |
| CN209281049U (en) * | 2019-01-07 | 2019-08-20 | 山东金艺珠宝有限公司 | A kind of fixed structure of the optical filter for jewelry |
| CN210080984U (en) * | 2019-02-20 | 2020-02-18 | 广东省智能制造研究所 | Multifunctional wall climbing welding robot system |
-
2020
- 2020-12-30 CN CN202011616936.9A patent/CN112578523A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6605916B1 (en) * | 1999-04-12 | 2003-08-12 | Canon Kabushiki Kaisha | Rotation position control apparatus of rotary element of filter |
| US6567225B1 (en) * | 2001-09-17 | 2003-05-20 | Artine B. Derian | Spectrum filter wheel |
| CN101806947A (en) * | 2010-03-25 | 2010-08-18 | 谭懋 | Rotation switching method and device of multiple optical filters of imaging sensor |
| US20130242528A1 (en) * | 2010-11-25 | 2013-09-19 | Uk Choi | Polarization Illumination System |
| CN102689085A (en) * | 2012-06-07 | 2012-09-26 | 中国东方电气集团有限公司 | Autonomous mobile dithering hot wire tungsten-inert-gas (TIG) welding robot system for welding large-sized precision equipment |
| CN202720183U (en) * | 2012-09-10 | 2013-02-06 | 重庆大学 | Excitation light source converting mechanism for lung cancer exhaled air detection |
| CN104793449A (en) * | 2014-01-22 | 2015-07-22 | 深圳市维安华科技有限公司 | Filter switching device and switching method thereof |
| CN106444229A (en) * | 2016-11-23 | 2017-02-22 | 东莞市维斗科技股份有限公司 | Multi-filter IR-CUT switcher |
| CN107526145A (en) * | 2017-07-27 | 2017-12-29 | 中国科学院长春光学精密机械与物理研究所 | A kind of optical filter switching structure and the optical instrumentation with the structure |
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| CN209281049U (en) * | 2019-01-07 | 2019-08-20 | 山东金艺珠宝有限公司 | A kind of fixed structure of the optical filter for jewelry |
| CN210080984U (en) * | 2019-02-20 | 2020-02-18 | 广东省智能制造研究所 | Multifunctional wall climbing welding robot system |
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Application publication date: 20210330 |