CN108181676B - Duty ratio continuous adjusting method of duty ratio continuous adjusting grating - Google Patents
Duty ratio continuous adjusting method of duty ratio continuous adjusting grating Download PDFInfo
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- CN108181676B CN108181676B CN201810014150.6A CN201810014150A CN108181676B CN 108181676 B CN108181676 B CN 108181676B CN 201810014150 A CN201810014150 A CN 201810014150A CN 108181676 B CN108181676 B CN 108181676B
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- grating
- duty ratio
- rectangular grating
- rectangular
- transmission rod
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
- G02B27/44—Grating systems; Zone plate systems
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1828—Diffraction gratings having means for producing variable diffraction
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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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
The invention discloses a duty ratio continuous adjusting method of a duty ratio continuous adjusting grating, belonging to the field of optics and precision instruments; the continuous duty ratio adjusting grating comprises a first rectangular grating and a second rectangular grating which are arranged up and down, have the same direction and the same period and have the duty ratio of 50 percent, wherein the first rectangular grating and the second rectangular grating move in opposite directions under the adjustment of a grating adjusting mechanism, and the grating adjusting mechanism is powered by a power transmission device arranged on a base; according to the duty ratio continuous adjustment method, the rotation of a motor in the power transmission device is controlled to drive a transmission rod to rotate so as to drive a rotating body to rotate, and an extending end on the rotating body drives a first rectangular grating and a second rectangular grating to move in opposite directions, so that the duty ratio continuous adjustment is realized; under the structure of the invention, the motor can be controlled to rotate at any time according to actual needs, so that the first rectangular grating and the second rectangular grating continuously move in opposite directions, and the duty ratio is continuously adjusted in real time.
Description
The application is a divisional application of the invention patent application 'a duty ratio continuous adjustment grating and a duty ratio continuous adjustment method'.
Application date of the original case: 2016-07-24.
Original application No.: 201610585540X.
The name of the original invention is: a duty cycle continuous adjustment grating and a duty cycle continuous adjustment method.
Technical Field
The invention discloses a duty ratio continuous adjusting method of a duty ratio continuous adjusting grating, and belongs to the field of optical and precision instruments.
Background
An optical device consisting of a large number of parallel slits of equal width and equal spacing is called a grating. The common grating is made by carving a large number of parallel nicks on a glass sheet, the nicks are opaque parts, and the smooth part between the two nicks can transmit light, which is equivalent to a slit array. Although the structure of the grating is not complex, the grating has wide application in a plurality of optical instruments and plays a key role.
The duty ratio of the grating carved on the glass sheet is a fixed value, and if the duty ratio can be changed according to needs in the application process, the grating can be widely applied, plays a larger role and plays a more revolutionary role. However, no raster has been found with a continuously adjustable duty cycle.
Disclosure of Invention
Aiming at the problems, the invention discloses a duty ratio continuous adjustment grating and a duty ratio continuous adjustment method, which can achieve the technical purpose of duty ratio continuous adjustment.
A continuous duty ratio adjusting grating comprises a first rectangular grating and a second rectangular grating which are arranged up and down, have the same direction and the same period and have the duty ratio of 50%, wherein the first rectangular grating and the second rectangular grating move in opposite directions under the adjustment of a grating adjusting mechanism, and the grating adjusting mechanism is powered by a power transmission device arranged on a base;
the first rectangular grating is arranged between two first supports through a first linear bearing, the two first supports are symmetrically arranged on the base, and the first linear bearing can ensure that the first rectangular grating moves in a horizontal plane with a fixed height; two first transmission rods with through grooves are symmetrically arranged at the bottom of the first rectangular grating; the second rectangular grating is arranged between the two second supports through second linear bearings, the two second supports are symmetrically arranged on the base, and the second linear bearings can ensure that the second rectangular grating moves in a horizontal plane with a fixed height; two second transmission rods with through grooves are symmetrically arranged at the bottom of the second rectangular grating;
the grating adjusting mechanism consists of two symmetrically arranged sub-mechanisms, each sub-mechanism comprises two coaxially arranged rotators, and the rotators are supported by rotator supports arranged on the base; the two rotating bodies are connected through a rotating shaft, the outer side of each rotating body is provided with a stretching end, the two stretching ends positioned on the two rotating bodies of the same sub-mechanism are arranged at two ends of the diameter of the section of each rotating body, the stretching end positioned at the outer side is inserted into the through groove of the first transmission rod, and the stretching end positioned at the inner side is inserted into the through groove of the second transmission rod;
the power transmission device comprises a motor and a third transmission rod which coaxially rotates with the motor, the third transmission rod is supported by a transmission bracket arranged on the base, and the third transmission rod is connected with a rotating shaft bearing or a belt and transmits power to the rotating shaft.
The above-mentioned duty cycle continuously adjusts the grating,
the body of turning is supported by the support of turning of installing on the base, and concrete structure lies in: the rotating body is connected with the rotating body support through a bearing, the rotating body is in interference fit with the inner ring of the bearing, and the rotating body support is fixedly connected with the outer ring of the bearing;
the third transfer line is supported by the transmission support of installing on the base, and concrete structure lies in: the third transmission rod is connected with the transmission bracket through a bearing, the third transmission rod is in interference fit with the bearing inner ring, and the transmission bracket is fixedly connected with the bearing outer ring.
The duty ratio is continuously adjusted, and a light source is arranged below the second rectangular grating.
And a diffuse transmission plate is arranged between the second rectangular grating and the light source.
A motor rotates to drive a third transmission rod to rotate so as to drive a rotating body to rotate, and an extending end on the rotating body drives a first rectangular grating and a second rectangular grating to move in opposite directions, so that the continuous duty ratio adjustment is realized.
The duty ratio continuous adjusting method comprises the following steps:
step a, adjusting a first rectangular grating and a second rectangular grating
Under the condition that two extending ends on two rotating bodies of the same sub-mechanism are positioned on the same vertical plane, the first rectangular grating and the second rectangular grating are superposed;
step b, adjusting the duty ratio according to the following formula
Wherein k is a duty ratio, d is a period of the first rectangular grating and the second rectangular grating, l is a wheel base of two extending ends on two rotating bodies of the same sub-mechanism, α is a rotating angle of the motor, and mod () is a remainder calculation.
Has the advantages that: under the structure of the invention, the first rectangular grating and the second rectangular grating can move in opposite directions only by controlling the rotation of the motor, thereby realizing duty ratio adjustment; meanwhile, the motion tracks of the first rectangular grating and the second rectangular grating are continuous, so that the duty ratio adjustment is also continuous; in the using process, the motor can be controlled to rotate at any time according to actual needs, so that the duty ratio adjustment is real-time; in summary, the present invention has the technical advantage of continuous real-time duty cycle adjustment.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of a continuous duty cycle adjusting grating according to the present invention.
Fig. 2 is a schematic structural diagram of a third embodiment of the continuous duty cycle adjusting grating of the present invention.
Fig. 3 is a schematic structural diagram of a fourth embodiment of the continuous duty cycle adjusting grating according to the present invention.
In the figure: 11 first rectangular raster, 12 second rectangular raster, 13 first bracket, 14 second bracket, 15 first transmission rod, 16 second transmission rod, 2 raster adjusting mechanism, 21 rotator, 22 rotating shaft, 23 extending end, 24 rotator bracket, 3 power transmission device, 31 motor, 32 third transmission rod, 33 transmission bracket, 4 base, 5 light source and 6 diffuse transmission plate.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The following describes in further detail specific embodiments of the present invention with reference to the accompanying drawings.
Detailed description of the preferred embodiment
The present embodiment is an embodiment of a duty cycle continuous adjustment grating.
The structure diagram of the duty cycle continuous adjustment grating of the embodiment is shown in fig. 1. The continuous duty ratio adjusting grating comprises a first rectangular grating 11 and a second rectangular grating 12 which are arranged up and down, have the same direction and the same period and have the duty ratio of 50 percent, wherein the first rectangular grating 11 and the second rectangular grating 12 move in opposite directions under the adjustment of a grating adjusting mechanism 2, and the grating adjusting mechanism 2 is powered by a power transmission device 3 arranged on a base 4;
the first rectangular grating 11 is installed between two first supports 13 through a first linear bearing, the two first supports 13 are symmetrically installed on the base 4, and the first linear bearing can ensure that the first rectangular grating 11 moves in a horizontal plane with a fixed height; two first transmission rods 15 with through grooves are symmetrically arranged at the bottom of the first rectangular grating 11; the second rectangular grating 12 is installed between two second brackets 14 through a second linear bearing, the two second brackets 14 are symmetrically installed on the base 4, and the second linear bearing can ensure that the second rectangular grating 12 moves in a horizontal plane with a fixed height; two second transmission rods 16 with through grooves are symmetrically arranged at the bottom of the second rectangular grating 12;
the grating adjusting mechanism 2 is composed of two symmetrically arranged sub-mechanisms, each sub-mechanism comprises two coaxially arranged rotators 21, and the rotators 21 are supported by rotator supports 24 arranged on the base 4; the two rotators 21 are connected through a rotating shaft 22, the outer side of each rotator 21 is provided with a protruding end 23, the two protruding ends 23 on the two rotators 21 of the same sub-mechanism are arranged at two ends of the section diameter of the rotator 21, the protruding end 23 at the outer side is inserted into the through groove of the first transmission rod 15, and the protruding end 23 at the inner side is inserted into the through groove of the second transmission rod 16;
the power transmission device 3 comprises a motor 31 and a third transmission rod 32 which coaxially rotates with the motor 31, the third transmission rod 32 is supported by a transmission bracket 33 arranged on the base 4, and the third transmission rod 32 is in bearing connection or belt connection with the rotating shaft 22 and transmits power to the rotating shaft 22.
Detailed description of the invention
The present embodiment is an embodiment of a duty cycle continuous adjustment grating.
The duty cycle continuous adjustment grating of the present embodiment further defines, on the basis of the first specific embodiment:
the body 21 is supported by a body support 24 mounted on the base 4, and the concrete structure is as follows: the rotator 21 is connected with the rotator support 24 through a bearing, the rotator 21 is in interference fit with the inner ring of the bearing, and the rotator support 24 is fixedly connected with the outer ring of the bearing;
the third transmission rod 32 is supported by a transmission bracket 33 arranged on the base 4, and the specific structure is as follows: the third transmission rod 32 is connected with the transmission bracket 33 through a bearing, the third transmission rod 32 is in interference fit with the bearing inner ring, and the transmission bracket 33 is fixedly connected with the bearing outer ring.
Detailed description of the preferred embodiment
The present embodiment is an embodiment of a duty cycle continuous adjustment grating.
The schematic structural diagram of the continuous duty ratio adjusting grating of this embodiment is shown in fig. 2, and on the basis of the first specific embodiment, the light source 5 is further disposed below the second rectangular grating 12.
Due to the structural design, the duty ratio continuous adjustment grating can be directly matched with the light source 5 for use, and an additional light source is not needed.
Detailed description of the invention
The present embodiment is an embodiment of a duty cycle continuous adjustment grating.
The schematic structural diagram of the duty ratio continuous adjustment grating of this embodiment is shown in fig. 3, and the duty ratio continuous adjustment grating is further defined between the second rectangular grating 12 and the light source 5 on the basis of the third specific embodiment, and is further provided with a diffuse transmission plate 6.
The light source 5 emits light beams, the light beams pass through the diffuse transmission plate 6 and then irradiate the second rectangular grating 12, and due to the structural design, the illumination light of the second rectangular grating 12 is more uniform, and the problem that the experiment effect is reduced due to the fact that the illumination light is not uniform can be solved. Detailed description of the preferred embodiment
The present embodiment is an embodiment of a duty cycle continuous adjustment method.
According to the duty ratio continuous adjustment method, the motor 31 rotates to drive the third transmission rod 32 to rotate, so as to drive the rotating body 21 to rotate, and the extension end 23 on the rotating body 21 drives the first rectangular grating 11 and the second rectangular grating 12 to move in opposite directions, so that the duty ratio continuous adjustment is realized.
Detailed description of the preferred embodiment
The present embodiment is an embodiment of a duty cycle continuous adjustment method.
The duty cycle continuous adjustment method of the embodiment is further limited to include, on the basis of the fifth specific embodiment:
step a, adjusting a first rectangular grating 11 and a second rectangular grating 12
Under the condition that two extending ends 23 on two rotators 21 of the same sub-mechanism are positioned on the same vertical plane, the first rectangular grating 11 and the second rectangular grating 12 are superposed;
step b, adjusting the duty ratio according to the following formula
Where k is a duty ratio, d is a period of the first rectangular grating 11 and the second rectangular grating 12, l is a wheel base of two extending ends 23 on two rotating bodies 21 of the same sub-mechanism, α is a rotation angle of the motor 31, and mod () is a remainder calculation.
The duty cycle continuous adjustment method of the embodiment provides the corresponding relation between the duty cycle and the rotation angle of the motor 31 based on the duty cycle continuous adjustment grating, and lays an experimental foundation for the specific operation of the duty cycle continuous adjustment method.
Claims (1)
1. The duty cycle continuous adjustment method of the duty cycle continuous adjustment grating is characterized in that the duty cycle continuous adjustment grating comprises a first rectangular grating (11) and a second rectangular grating (12) which are vertically arranged, have the same direction and the same period and have the duty cycle of 50%, the first rectangular grating (11) and the second rectangular grating (12) move in opposite directions under the adjustment of a grating adjustment mechanism (2), and the grating adjustment mechanism (2) is powered by a power transmission device (3) arranged on a base (4);
the first rectangular grating (11) is arranged between two first brackets (13) through a first linear bearing, the two first brackets (13) are symmetrically arranged on the base (4), and the first linear bearing can ensure that the first rectangular grating (11) moves in a horizontal plane with a fixed height; two first transmission rods (15) with through grooves are symmetrically arranged at the bottom of the first rectangular grating (11); the second rectangular grating (12) is arranged between two second supports (14) through a second linear bearing, the two second supports (14) are symmetrically arranged on the base (4), and the second linear bearing can ensure that the second rectangular grating (12) moves in a horizontal plane with a fixed height; two second transmission rods (16) with through grooves are symmetrically arranged at the bottom of the second rectangular grating (12);
the grating adjusting mechanism (2) consists of two symmetrically arranged sub-mechanisms, each sub-mechanism comprises two coaxially arranged rotators (21), and the rotators (21) are supported by rotator supports (24) arranged on the base (4); the two rotating bodies (21) are connected through a rotating shaft (22), the outer side of each rotating body (21) is provided with a protruding end (23), the two protruding ends (23) positioned on the two rotating bodies (21) of the same sub-mechanism are arranged at two ends of the section diameter of the rotating body (21), the protruding end (23) positioned at the outer side is inserted into the through groove of the first transmission rod (15), and the protruding end (23) positioned at the inner side is inserted into the through groove of the second transmission rod (16);
the power transmission device (3) comprises a motor (31) and a third transmission rod (32) which coaxially rotates with the motor (31), the third transmission rod (32) is supported by a transmission bracket (33) arranged on the base (4), and the third transmission rod (32) is in bearing connection or belt connection with the rotating shaft (22) and transmits power to the rotating shaft (22);
according to the duty ratio continuous adjustment method, the motor (31) rotates to drive the third transmission rod (32) to rotate, so that the rotating body (21) is driven to rotate, the extending end (23) on the rotating body (21) drives the first rectangular grating (11) and the second rectangular grating (12) to move in the opposite direction, and the duty ratio continuous adjustment is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810014150.6A CN108181676B (en) | 2016-07-24 | 2016-07-24 | Duty ratio continuous adjusting method of duty ratio continuous adjusting grating |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810014150.6A CN108181676B (en) | 2016-07-24 | 2016-07-24 | Duty ratio continuous adjusting method of duty ratio continuous adjusting grating |
| CN201610585540.XA CN106054296B (en) | 2016-07-24 | 2016-07-24 | A kind of dutycycle continuously adjusts grating and dutycycle method for continuously adjusting |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610585540.XA Division CN106054296B (en) | 2016-07-24 | 2016-07-24 | A kind of dutycycle continuously adjusts grating and dutycycle method for continuously adjusting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108181676A CN108181676A (en) | 2018-06-19 |
| CN108181676B true CN108181676B (en) | 2020-02-28 |
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Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810014148.9A Expired - Fee Related CN108181722B (en) | 2016-07-24 | 2016-07-24 | Duty ratio continuous adjusting method |
| CN201610585540.XA Expired - Fee Related CN106054296B (en) | 2016-07-24 | 2016-07-24 | A kind of dutycycle continuously adjusts grating and dutycycle method for continuously adjusting |
| CN201810014150.6A Expired - Fee Related CN108181676B (en) | 2016-07-24 | 2016-07-24 | Duty ratio continuous adjusting method of duty ratio continuous adjusting grating |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810014148.9A Expired - Fee Related CN108181722B (en) | 2016-07-24 | 2016-07-24 | Duty ratio continuous adjusting method |
| CN201610585540.XA Expired - Fee Related CN106054296B (en) | 2016-07-24 | 2016-07-24 | A kind of dutycycle continuously adjusts grating and dutycycle method for continuously adjusting |
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| Country | Link |
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| CN (3) | CN108181722B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602160A (en) * | 2012-03-09 | 2012-07-25 | 方平 | Reflecting type grating light valve and processing method thereof |
| CN103345067A (en) * | 2013-06-25 | 2013-10-09 | 福州大学 | Grating device capable of achieving 2D/3D conversion and displayer containing same |
| CN105301686A (en) * | 2015-11-20 | 2016-02-03 | 天津市拓普仪器有限公司 | Electric fine-adjustable double grating used in spectrometer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4167666A (en) * | 1978-04-28 | 1979-09-11 | The United States Of America As Represented By The Secretary Of The Army | Multi-grating attenuator for high power pulsed laser beams |
| KR100574966B1 (en) * | 2004-01-20 | 2006-05-02 | 삼성전자주식회사 | Photomask and method for adjusting transmission coefficient and phase by use of the same |
| US7173764B2 (en) * | 2004-04-22 | 2007-02-06 | Sandia Corporation | Apparatus comprising a tunable nanomechanical near-field grating and method for controlling far-field emission |
| US8411353B2 (en) * | 2009-08-12 | 2013-04-02 | Polyvalor, Limited Partnerhsip | Quasi-phase-matched wavelength converter |
| CN101750671B (en) * | 2009-12-23 | 2012-09-26 | 南京大学 | Planar waveguide Bragg grating and laser thereof based on reconstruction-equivalent chirp and equivalent apodization |
| CN101833135B (en) * | 2010-05-14 | 2011-09-14 | 中国科学院上海光学精密机械研究所 | Transmission-type grating phase shifter |
| CN101833172B (en) * | 2010-06-13 | 2011-10-05 | 中南大学 | Method for coupling and splitting polarized light and light coupling and splitting device |
| CN101915954A (en) * | 2010-07-29 | 2010-12-15 | 北京交通大学 | Method for manufacturing sampling fiber bragg grating by utilizing photointerrupter |
| JP2014006950A (en) * | 2012-06-25 | 2014-01-16 | Asahi Glass Co Ltd | Diffraction element and optical head device |
| CN103185918B (en) * | 2013-03-18 | 2015-05-06 | 南京邮电大学 | Micro-electro-mechanical adjustable nitride resonant grating |
| CN103576225B (en) * | 2013-11-08 | 2016-01-20 | 无锡英普林纳米科技有限公司 | Position phase mask lithography prepares the method for the adjustable nanometer periodic optical grating of dutycycle |
| CN104076435B (en) * | 2014-07-14 | 2016-07-13 | 西北工业大学 | The femtosecond laser producing device of Sampled Fiber Bragg Grating SFBG and method |
| CN205809339U (en) * | 2016-07-24 | 2016-12-14 | 哈尔滨理工大学 | A kind of dutycycle continuously adjusts grating |
-
2016
- 2016-07-24 CN CN201810014148.9A patent/CN108181722B/en not_active Expired - Fee Related
- 2016-07-24 CN CN201610585540.XA patent/CN106054296B/en not_active Expired - Fee Related
- 2016-07-24 CN CN201810014150.6A patent/CN108181676B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602160A (en) * | 2012-03-09 | 2012-07-25 | 方平 | Reflecting type grating light valve and processing method thereof |
| CN103345067A (en) * | 2013-06-25 | 2013-10-09 | 福州大学 | Grating device capable of achieving 2D/3D conversion and displayer containing same |
| CN105301686A (en) * | 2015-11-20 | 2016-02-03 | 天津市拓普仪器有限公司 | Electric fine-adjustable double grating used in spectrometer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108181722B (en) | 2020-03-06 |
| CN106054296A (en) | 2016-10-26 |
| CN106054296B (en) | 2018-03-23 |
| CN108181676A (en) | 2018-06-19 |
| CN108181722A (en) | 2018-06-19 |
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