CN109239910B - Optical filter switching device - Google Patents
Optical filter switching device Download PDFInfo
- Publication number
- CN109239910B CN109239910B CN201811365329.2A CN201811365329A CN109239910B CN 109239910 B CN109239910 B CN 109239910B CN 201811365329 A CN201811365329 A CN 201811365329A CN 109239910 B CN109239910 B CN 109239910B
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- cover plate
- mounting
- fixedly connected
- positioning block
- optical filter
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- 230000003287 optical effect Effects 0.000 title claims abstract description 50
- 239000013307 optical fiber Substances 0.000 claims abstract description 9
- 239000000835 fiber Substances 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000005299 abrasion Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 5
- 238000000338 in vitro Methods 0.000 description 4
- 239000003814 drug Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000004611 spectroscopical analysis Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
- G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Astronomy & Astrophysics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
The invention discloses a light filter switching device, which comprises a motor, a light source component and an optical fiber bracket, wherein a motor shaft is fixedly connected with a connecting piece, the connecting piece comprises a positioning block and a magnetic connecting plate, the positioning block is sleeved with a light filter component, the light filter component comprises a cover plate and a rotating disk which are sequentially sleeved on the positioning block, the rotating disk is fixedly connected with the cover plate into a whole through bolts, and the rear surface of the rotating disk is connected with the magnetic connecting plate into a whole through a magnet and is in clearance fit with a mounting plate; the left end and the right end of the rotating disk are respectively and evenly provided with step holes for installing the optical filters at intervals, the left end and the right end of the cover plate are respectively provided with first through holes corresponding to the step holes, and the aperture of each first through hole is smaller than the diameter of each optical filter. The optical filter component is connected with the connecting piece into a whole through magnetic force, so that the abrasion problem caused by a traditional mechanical connection mode is solved, the optical filter can be quickly assembled and disassembled by the optical filter component, the maintenance is convenient, and the optical filter component is convenient to assemble and disassemble.
Description
Technical Field
The invention relates to the technical field of spectrum analysis, in particular to a light filter switching device of in-vitro spectrum detection equipment.
Background
The spectroscopic analysis method is a method for identifying substances and determining chemical compositions and relative contents thereof according to spectra of the substances, and is widely used in the fields of medicine (especially inspection medicine), biology, chemistry and the like due to the advantages of high analysis speed, simple operation, good selectivity and the like. In-vitro detection equipment in test medicine adopts spectroscopic analysis to analyze and detect samples (such as blood, tissues and the like), and a plurality of different optical filters are usually arranged in the in-vitro detection equipment so as to meet the detection requirements of different harrow targets in the samples.
At present, an optical filter switching mechanism in an in-vitro spectrum detection device mainly comprises a gear-rack transmission mechanism and a belt transmission mechanism, wherein the gear-rack transmission mechanism is used for fixing an optical filter on a rack, and a motor drives the rack to move through a gear to realize switching of the optical filter; when the optical filter is replaced, the gear and the rack are required to be completely detached, the disassembly and assembly space is small, the operation is inconvenient, and the maintenance difficulty is high. The switching mechanism of the belt transmission mechanism is characterized in that a plurality of optical filters are fixedly connected to a belt, a motor drives the optical filters on the belt to move through a driving wheel and a driving wheel to realize switching of the optical filters, but the switching mechanism of the belt transmission mode is complex in structure, inconvenient to assemble and disassemble, and high in precision requirement on the belt transmission mechanism in order to ensure that the optical filters are accurate in place. Therefore, how to design a filter switching device with simple structure, convenient maintenance and high accuracy is an important problem for those skilled in the art to study.
Disclosure of Invention
The invention aims to provide the optical filter switching device which has a simple structure, is convenient to assemble and disassemble and has high accuracy.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention relates to an optical filter switching device, which comprises a motor fixedly connected to the rear surface of a mounting plate, a light source assembly and an optical fiber bracket fixedly connected to the front surface of the mounting plate, wherein a motor shaft of the motor extends forwards out of the mounting plate, a connecting piece is fixedly connected to the motor shaft extending out of the mounting plate, the connecting piece comprises a positioning block fixedly connected to the motor shaft and a magnetic connecting plate fixedly connected to the rear surface of the positioning block, and the inner diameter of the magnetic connecting plate is larger than that of the motor shaft; the positioning block is sleeved with a light filter component, the light filter component comprises a cover plate and a rotating disk, the cover plate and the rotating disk are sequentially sleeved on the positioning block, the rotating disk is fixedly connected with the cover plate into a whole through bolts, and the rear surface of the rotating disk is connected with the magnetic connecting plate into a whole through a magnet and is in clearance fit with the mounting plate; the left end and the right end of the rotating disc are respectively and evenly provided with step holes for installing the optical filters at intervals, the left end and the right end of the cover plate are respectively provided with first through holes corresponding to the step holes one by one, and the aperture of each first through hole is smaller than the diameter of each optical filter.
The mounting plate on the left side of the optical filter component is provided with a position sensor, the left lower part of the front surface of the rotating disk is provided with a mounting groove, a sensor sensing piece is fixedly connected in the mounting groove, and the outer end of the sensor sensing piece extends out of the mounting groove.
And a first through groove is formed in the cover plate at the position corresponding to the mounting groove.
The upper right part of the cover plate is provided with a second through groove with the same structure as the first through groove, and the second through groove is rotated anticlockwise for 180 degrees and then corresponds to the mounting groove in front-back mode.
The positioning block is fixedly connected with the motor shaft through a jackscrew; the outer surface of the positioning block is milled with a plane, a guide post is vertically arranged on the plane of the positioning block, a second through hole matched with the guide post is symmetrically arranged in the middle of the rotating disk, a third through hole matched with the guide post is symmetrically arranged in the middle of the cover plate, and the second through hole and the third through hole are correspondingly arranged front and back.
The number of the magnets is plural; and mounting blind holes are formed in the rear surface of the rotary disk, which is close to the positioning block, at intervals along the circumferential direction of the rotary disk, one end of each magnet is embedded in each mounting blind hole, and the other end of each magnet is connected with the magnetic connecting plate into a whole through magnetic force.
The cover plate and the rotating disc are the same in shape, and the upper part and the lower part of the rotating disc, the upper part and the lower part of the cover plate are inwards concave towards the center of the optical filter assembly to form a holding groove.
The optical fiber support is of an integrally formed L-shaped structure and comprises a connecting part and a limiting part, wherein the connecting part is vertically and fixedly connected to the mounting plate, the limiting part is arranged in parallel with the mounting plate, the limiting part extends to the front of the optical filter assembly, a gap between the limiting part and the cover plate is 1-2 mm, and an optical fiber mounting hole is formed in the limiting part.
The light source assembly is composed of two LED lamp groups which are arranged at left and right intervals.
The invention has the advantages of simple structure, simple and convenient disassembly and assembly of the optical filter, reduced maintenance and maintenance difficulty, and is specifically characterized in the following points:
1. the rotating disc is connected with the magnetic connecting plate into a whole through the magnet, namely the optical filter component is connected with the connecting piece into a whole through magnetic force, so that on one hand, the abrasion problem caused by the traditional mechanical connection mode is solved, and the service life is long; on the other hand, the filter can be quickly disassembled and assembled, and the filter assembly is convenient to maintain.
2. According to the invention, the rotating disc and the cover plate are fixedly connected into a whole through the bolts, the optical filter is fixed in the step hole through the rotating disc and the cover plate, the optical filter is easy and quick to replace, the requirements on technicians are low, the later maintenance is convenient, and the working efficiency is greatly improved; the left end part and the right end part of the rotating disk can be preloaded with a plurality of optical filters, so that the occupied space is small, and the switching requirements of a plurality of different wave band spectrums can be met simultaneously; the rotary disk and the cover plate have the same shape, and the middle parts of the rotary disk and the cover plate are concave inwards to form a holding groove, so that the rotary disk is convenient to hold and disassemble.
3. According to the invention, the position of the optical filter can be accurately judged by detecting the position of the sensor sensing piece through the position sensor, the optical filter is accurately positioned, and the problems of poor positioning precision and the like caused by mechanical fatigue are effectively avoided.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an exploded view of the present invention.
Fig. 3 is a schematic view of the structure of the rotary table in fig. 2.
Fig. 4 is a schematic rear view of the rotary disk according to the present invention.
Detailed Description
As shown in fig. 1-4, the optical filter switching device comprises a motor 2.1 fixedly connected to the rear surface of a mounting plate 1, a light source assembly 3 and an optical fiber bracket fixedly connected to the front surface of the mounting plate 1, wherein the light source assembly 3 comprises two groups of left and right LED lamp groups which are arranged at intervals; the motor shaft 2.2 of the motor 2.1 extends forwards to form a mounting plate 1, a connecting piece is fixedly connected to the motor shaft 2.2 extending out of the mounting plate 1, the connecting piece comprises a positioning block 4 and a magnetic connecting plate 5 fixedly connected to the rear surface of the positioning block 4, the inner diameter of the magnetic connecting plate 5 is larger than the diameter of the motor shaft 2.2, and friction is reduced; the positioning block 4 is fixedly connected to the motor shaft 2.2 through a jackscrew, so that the fixing effect is ensured; the positioning block 4 is sleeved with a filter component, the filter component comprises a cover plate 6 and a rotating disk 7 which are sequentially sleeved on the positioning block 4 from front to back, the rotating disk 7 is fixedly connected with the cover plate 6 into a whole through bolts, four mounting blind holes 16 are formed in the rear surface of the rotating disk 7 close to the positioning block 4 at intervals along the circumferential direction of the rotating disk, a magnet is in interference fit in each mounting blind hole 16, one end of the magnet is embedded in the mounting blind hole 16, the other end of the magnet is connected with the magnetic connecting plate 5 into a whole through magnetic force, namely the filter component is connected with the magnetic connecting plate 5 into a whole through the magnetic force of the magnet, so that the filter component can be quickly disassembled and assembled, the abrasion problem caused by a traditional mechanical transmission mechanism can be effectively avoided, and the service life is long; the rotating disc 7 is in clearance fit with the mounting plate 1, so that friction with the mounting plate 1 is prevented when the rotating disc 7 rotates; the cover plate 6 and the rotary disk 7 are identical in shape and are of dumbbell-shaped structures, the upper part and the lower part of the rotary disk 7 are respectively inwards concave towards the central hole of the rotary disk to form a pair of first hand holding grooves, and the upper part and the lower part of the cover plate 6 are respectively inwards concave towards the central hole of the rotary disk to form a pair of second hand holding grooves, so that the rotary disk is convenient to assemble and disassemble; the left end and the right end of the rotating disk 7 are respectively and uniformly provided with three step holes 8 for installing optical filters at intervals, the left end and the right end of the cover plate 6 are respectively provided with first through holes 9 which are in one-to-one correspondence with the step holes 8, and the aperture of each first through hole 9 is smaller than the diameter of each optical filter so as to prevent the optical filter from falling out of the step holes 8; the rotary disk 7 and the cover plate 6 of the filter component are connected through bolts, so that the filter component is easy and convenient to assemble and disassemble, and quick replacement and installation of the filter can be realized.
As shown in fig. 1 and 2, a position sensor 10 is disposed on the mounting plate 1 on the left side of the filter assembly, a mounting groove 11 is formed in the left lower portion of the front surface of the rotary disk 7, a sensor sensing piece 12 is fixedly connected in the mounting groove 11 through a bolt, and the outer end of the sensor sensing piece 12 extends outwards out of the mounting groove 11. In operation, the position sensor 10 can accurately memorize the position of the rotary disk 7 by detecting the position of the sensor sensing piece 12, thereby ensuring the rotation precision of the optical filter component. As shown in fig. 1 and 2, a first through groove 13.1 is formed in the cover plate 6 at a position corresponding to the mounting groove 11, so that the sensor sensing piece 12 can be conveniently mounted; in order to improve the installation efficiency, the upper right part of the cover plate 6 is provided with a second through groove 13.2 with the same structure as the first through groove 13.1, the second through groove 13.2 is rotated anticlockwise by 180 degrees and then corresponds to the installation groove 11, and the cover plate 6 and the rotating disc 7 can be fixedly connected into a whole only by correspondingly placing the first through groove 13.1 or the second through groove 13.2 and the installation groove 11, so that the installation efficiency of the sensor sensing piece 12 is further improved. Of course, in actual manufacturing, in order to further improve the installation efficiency, a third through groove with the same structure as the second through groove 13.2 may be disposed at the upper left part and the lower right part of the cover plate 6, so as to realize quick matching installation of the cover plate 6 and the rotating disc 7.
As shown in fig. 1 and 2, the outer surface of the positioning block 4 is milled with a plane, a guide post 14 (the guide post 14 is in interference fit with the positioning block 4) is vertically arranged on the plane of the positioning block 4, second through holes 15.1 (the second through holes 15.1 are communicated with the central holes of the rotating disk 7) matched with the guide post 14 are symmetrically arranged in the middle of the rotating disk 7, third through holes 15.2 (the third through holes 15.2 are communicated with the central holes of the cover plate 6) matched with the guide post 14 are symmetrically arranged in the middle of the cover plate 6, and the positioning block 4 drives the rotating disk 7 and the cover plate 6 to rotate through the guide post 14, so that the quick switching of the optical filter is realized. The second through holes 15.1 and the third through holes 15.2 are correspondingly arranged front and back, and the number of the second through holes 15.1 and the third through holes 15.2 is two, so that the quick installation of the rotary disk 7 and the cover plate 6 can be realized.
As shown in fig. 1 and 2, the optical fiber bracket is in an L-shaped structure, and comprises a connecting part 17.1 vertically and fixedly connected to the mounting plate 1 and a limiting part 17.2 fixedly connected to the front end of the connecting part 17.1, wherein an optical fiber mounting hole is formed in the limiting part 17.2, the limiting part 17.2 extends along the length direction of the mounting plate 1 and extends to the front of the optical filter assembly, a gap between the limiting part 17.2 and the cover plate 6 is 1 mm-2 mm, and the optical filter assembly is prevented from being separated from the positioning block 4.
When the optical filter device works, the motor 2.1 drives the magnetic connecting plate 5 to rotate along with the motor shaft 2.2 through the positioning block 4, and the rotating disk 7 is adsorbed with the magnetic connecting plate 5 into a whole through the magnet, and the magnetic connecting plate 5 drives the optical filter component to rotate when rotating, so that the optical filter is switched, and the switching requirements of different samples on different wave band spectrums are met; the position sensor 10 accurately memorizes the position of the rotary disk 7 by detecting the position of the sensor sensing piece 12 during the optical filter switching, ensures the optical filter switching in place and ensures the rotation precision of the optical filter.
Claims (7)
1. The utility model provides a light filter auto-change over device, includes motor (2.1) that links firmly at mounting panel (1) rear surface, light source subassembly (3) and links firmly the optic fibre support of mounting panel (1) front surface, motor shaft (2.2) of motor (2.1) extend mounting panel (1) forward, its characterized in that: the motor shaft (2.2) extending out of the mounting plate (1) is fixedly connected with a connecting piece, the connecting piece comprises a positioning block (4) fixedly connected to the motor shaft (2.2) and a magnetic connecting plate (5) fixedly connected to the rear surface of the positioning block (4), and the inner diameter of the magnetic connecting plate (5) is larger than the diameter of the motor shaft (2.2);
the positioning block (4) is sleeved with a light filter assembly, the light filter assembly comprises a cover plate (6) and a rotating disc (7) which are sequentially sleeved on the positioning block (4), the rotating disc (7) is fixedly connected with the cover plate (6) into a whole through bolts, and the rear surface of the rotating disc is connected with the magnetic connecting plate (5) into a whole through a magnet and is in clearance fit with the mounting plate (1); step holes (8) for installing optical filters are respectively and uniformly arranged at the left end and the right end of the rotating disc (7) at intervals, first through holes (9) which are in one-to-one correspondence with the step holes (8) are respectively formed at the left end and the right end of the cover plate (6), and the aperture of each first through hole (9) is smaller than the diameter of each optical filter;
a position sensor (10) is arranged on the mounting plate (1) positioned at the left side of the optical filter component, a mounting groove (11) is formed in the left lower part of the front surface of the rotating disk (7), a sensor sensing piece (12) is fixedly connected in the mounting groove (11), and the outer end of the sensor sensing piece (12) extends out of the mounting groove (11);
the number of the magnets is plural; the rear surface of the rotary disk (7) close to the positioning block (4) is provided with mounting blind holes (16) at intervals along the circumferential direction, one end of each magnet is embedded in each mounting blind hole (16), and the other end of each magnet is connected with the magnetic connecting plate (5) into a whole through magnetic force.
2. The filter switching device according to claim 1, wherein: a first through groove (13.1) is formed in the cover plate (6) at the position corresponding to the mounting groove (11).
3. The filter switching device according to claim 2, wherein: the upper right part of the cover plate (6) is provided with a second through groove (13.2) with the same structure as the first through groove (13.1), and the second through groove (13.2) is rotated anticlockwise by 180 degrees and then corresponds to the mounting groove (11) front and back.
4. The filter switching device according to claim 1, wherein: the positioning block (4) is fixedly connected with the motor shaft (2.2) through a jackscrew; the surface of locating piece (4) mills there is the plane, is provided with guide pillar (14) perpendicularly on the plane of locating piece (4), rotary disk (7) middle part symmetry set up with guide pillar (14) matched with second through-hole (15.1), apron (6) middle part symmetry set up with guide pillar (14) matched with third through-hole (15.2), second through-hole (15.1) and third through-hole (15.2) correspond the setting around.
5. The filter switching device according to claim 1 or 4, wherein: the cover plate (6) and the rotary disk (7) are the same in shape, and the upper part and the lower part of the rotary disk (7) and the upper part and the lower part of the cover plate (6) are inwards concave towards the center of the optical filter assembly respectively to form a holding groove.
6. The filter switching device according to claim 1, wherein: the optical fiber support is of an integrally formed L-shaped structure and comprises a connecting part (17.1) vertically and fixedly connected to the mounting plate (1) and a limiting part (17.2) arranged in parallel with the mounting plate, the limiting part (17.2) extends to the front of the optical filter assembly, a gap between the limiting part (17.2) and the cover plate (6) is 1-2 mm, and an optical fiber mounting hole is formed in the limiting part (17.2).
7. The filter switching device according to claim 1, wherein: the light source assembly (3) is composed of two LED lamp groups which are arranged at left and right intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811365329.2A CN109239910B (en) | 2018-11-16 | 2018-11-16 | Optical filter switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811365329.2A CN109239910B (en) | 2018-11-16 | 2018-11-16 | Optical filter switching device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109239910A CN109239910A (en) | 2019-01-18 |
| CN109239910B true CN109239910B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811365329.2A Active CN109239910B (en) | 2018-11-16 | 2018-11-16 | Optical filter switching device |
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| Country | Link |
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| CN (1) | CN109239910B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112557326B (en) * | 2020-12-22 | 2023-07-07 | 西安鼎研科技股份有限公司 | Multi-axis differential absorption spectrometer measuring device and working method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002031763A (en) * | 2000-07-17 | 2002-01-31 | Olympus Optical Co Ltd | Optical element switching turret |
| JP2011141403A (en) * | 2010-01-06 | 2011-07-21 | Tamron Co Ltd | Optical element switching mechanism and lens barrel |
| CN203705797U (en) * | 2014-01-24 | 2014-07-09 | 信华精机有限公司 | Filter switching device |
| CN205787358U (en) * | 2016-05-23 | 2016-12-07 | 杭州海康威视数字技术股份有限公司 | Switching device of optical fiber |
| CN208969336U (en) * | 2018-11-16 | 2019-06-11 | 安图实验仪器(郑州)有限公司 | Switching device of optical fiber |
-
2018
- 2018-11-16 CN CN201811365329.2A patent/CN109239910B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002031763A (en) * | 2000-07-17 | 2002-01-31 | Olympus Optical Co Ltd | Optical element switching turret |
| JP2011141403A (en) * | 2010-01-06 | 2011-07-21 | Tamron Co Ltd | Optical element switching mechanism and lens barrel |
| CN203705797U (en) * | 2014-01-24 | 2014-07-09 | 信华精机有限公司 | Filter switching device |
| CN205787358U (en) * | 2016-05-23 | 2016-12-07 | 杭州海康威视数字技术股份有限公司 | Switching device of optical fiber |
| CN208969336U (en) * | 2018-11-16 | 2019-06-11 | 安图实验仪器(郑州)有限公司 | Switching device of optical fiber |
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| CN109239910A (en) | 2019-01-18 |
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