CN108181721B - Contrast continuous adjustment method of contrast continuous adjustment grating - Google Patents
Contrast continuous adjustment method of contrast continuous adjustment grating Download PDFInfo
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- CN108181721B CN108181721B CN201810014147.4A CN201810014147A CN108181721B CN 108181721 B CN108181721 B CN 108181721B CN 201810014147 A CN201810014147 A CN 201810014147A CN 108181721 B CN108181721 B CN 108181721B
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- grating
- contrast
- sinusoidal grating
- sinusoidal
- continuous adjustment
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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
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- 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
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- 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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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
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Abstract
The invention relates to a contrast continuous adjustment method of a contrast continuous adjustment grating, belonging to the field of optical and precision instruments, wherein the contrast continuous adjustment grating comprises an th sinusoidal grating and a second sinusoidal grating which are arranged up and down and have the same direction and the same period, the th sinusoidal grating and the second sinusoidal grating move reversely under the adjustment of a grating adjustment mechanism, the grating adjustment mechanism is powered by a power transmission device arranged on a base, the contrast continuous adjustment method drives a transmission rod to rotate by controlling the rotation of a motor in the power transmission device, further drives a rotating body to rotate, drives a th sinusoidal grating and the second sinusoidal grating to move reversely by an extending end on the rotating body, and realizes the continuous adjustment of the contrast, and under the structure of the invention, the rotation of the motor can be controlled at any time according to actual needs, so that the th sinusoidal grating and the second sinusoidal grating continuously move reversely, and the continuous real-time adjustment of the contrast is realized.
Description
The application is a divisional application of ' contrast continuous adjustment gratings and contrast continuous adjustment method'.
Application date of the original case: 2016-07-24.
Original application No.: 201610585597X.
The invention relates to contrast continuous adjustment gratings and a contrast continuous adjustment method.
Technical Field
The invention relates to a contrast continuous adjusting method of a contrast continuous adjusting grating, belonging to the field of optical and precision instruments.
Background
The grating is made by carving a large number of parallel nicks on a glass sheet, the nicks are opaque parts, the smooth part between the two nicks can transmit light, and the grating is equivalent to a slit array.
The contrast ratio of the grating carved on the glass sheet under the same illumination intensity is a fixed value because the transmittance does not change, and if the contrast ratio can be changed as required in the application process, the grating can be applied more widely, plays a larger role and plays a more revolutionary role.
Disclosure of Invention
Aiming at the problems, the invention discloses contrast continuous adjustment gratings and a contrast continuous adjustment method, which can achieve the technical purpose of contrast continuous adjustment.
kinds of contrast continuous adjustment gratings, including the th sinusoidal grating and the second sinusoidal grating which are arranged up and down and have the same direction and the same period, the th sinusoidal grating and the second sinusoidal grating move reversely under the adjustment of the grating adjustment mechanism, the grating adjustment mechanism is powered by the power transmission device installed on the base;
the th sinusoidal grating is installed between two th supports through linear bearings, the two th supports are symmetrically installed on a base, the linear bearings can ensure that the th sinusoidal grating moves in a horizontal plane with a fixed height, the bottoms of the th sinusoidal gratings are symmetrically provided with two th transmission rods with through grooves, the second sinusoidal grating is installed between the two second supports through linear bearings, the two second supports are symmetrically installed on the base, and the linear bearings can ensure that the second sinusoidal grating moves in the horizontal plane with the fixed height;
the grating adjusting mechanism consists of two symmetrically arranged sub-mechanisms, each sub-mechanism comprises two coaxially arranged rotators, and each rotator is supported by a rotator bracket arranged on the base and is connected with the other rotators through a rotating shaft, the outer side of each rotator is provided with an extending end, the two extending ends positioned on the two rotators of the same sub-mechanism are arranged at two ends of the section diameter of the rotator, the extending end positioned at the outer side is inserted into the through groove of the transmission rod, and the extending 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 transmission rod which coaxially rotates with the motor, the transmission rod is supported by a transmission bracket arranged on the base, and the transmission rod is connected with a rotating shaft bearing or a belt to transmit power to the rotating shaft.
The contrast-continuously tuned grating described above,
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 transfer line is supported by the transmission support of installing on the base, and concrete structure lies in: the transmission rod is connected with the transmission bracket through a bearing, the transmission rod is in interference fit with the bearing inner ring, and the transmission bracket is fixedly connected with the bearing outer ring.
The contrast continuously-adjusted grating is arranged above the first sinusoidal grating, and a light source is arranged below the second sinusoidal grating.
And a diffuse transmission plate is arranged between the second sinusoidal grating and the light source.
A continuous contrast adjustment method is realized by rotating a motor to drive a transmission rod to rotate and further drive a rotating body to rotate, and an extending end on the rotating body drives a sine grating and a second sine grating to move in opposite directions to realize continuous contrast adjustment.
The contrast continuous adjusting method comprises the following steps:
step a, adjusting th sinusoidal grating and second sinusoidal 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 th sinusoidal grating and the second sinusoidal grating are superposed;
step b, according to the following formula, adjusting the contrast
Wherein k is the contrast, C1Contrast of th sinusoidal grating, C2The contrast of the second sinusoidal grating is represented by l, the shaft distance of two extending ends on two rotating bodies of the same sub-mechanism is represented by l, and α represents the rotating angle of the motor;
the specific derivation process is as follows:
the th sinusoidal grating has an intensity expression:
the light intensity expression of the second sinusoidal grating is as follows:
after the motor rotates for α degrees, the light intensity expression of the th sinusoidal grating is:
after the motor rotates α degrees, the light intensity expression of the second sinusoidal grating is:
the synthesized normalized light intensity expression is as follows:
the contrast is then:
the contrast continuous adjusting method comprises the following steps:
step a, adjusting th sinusoidal grating and second sinusoidal 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 th sinusoidal grating and the second sinusoidal grating are superposed;
step b, according to the following formula, adjusting the contrast
Wherein k is contrast, C is contrast of th sinusoidal grating and second sinusoidal grating, l is the axle distance of two extending ends on two rotating bodies of the same sub-mechanism, and α is the rotation angle of the motor;
the specific derivation process is as follows:
the th sinusoidal grating and the second sinusoidal grating have the following light intensity expressions:
after the motor rotates for α degrees, the light intensity expression of the th sinusoidal grating is:
after the motor rotates α degrees, the light intensity expression of the second sinusoidal grating is:
the synthesized normalized light intensity expression is as follows:
the contrast is then:
the control method has the advantages that the th sinusoidal grating and the second sinusoidal grating can move in opposite directions only by controlling the rotation of the motor under the structure of the control method, so that the contrast adjustment is realized, meanwhile, the contrast adjustment is continuous because the motion tracks of the th sinusoidal grating and the second sinusoidal grating are continuous, and the contrast adjustment is real-time because the motor can be controlled to rotate at any time according to actual needs in the using process, and the control method has the technical advantage of continuous real-time contrast adjustment.
Drawings
FIG. 1 is a schematic diagram of a contrast-adjusting grating according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a third embodiment of the contrast-continuously-adjusting grating of the present invention.
Fig. 3 is a schematic structural diagram of a fourth embodiment of the contrast-continuously-adjusting grating according to the present invention.
In the figure, an th sinusoidal grating, a 12 th sinusoidal grating, a 13 th bracket, a 14 th second bracket, a 15 th transmission rod, a 16 th second transmission rod, a 2 grating adjusting mechanism, a 21 rotating body, a 22 rotating shaft, a 23 extending end, a 24 rotating body bracket, a 3 power transmission device, a 31 motor, a 32 transmission rod, a 33 transmission bracket, a 4 base, a 5 light source and a 6 diffuse transmission plate are arranged.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Specific embodiments of the present invention are described in further detail below with reference to the following figures.
Specific example
This embodiment is an embodiment of a contrast-continuously tuned grating.
The structure schematic diagram of the contrast continuous adjustment grating of the embodiment is shown in fig. 1, the contrast continuous adjustment grating comprises an th sinusoidal grating 11 and a second sinusoidal grating 12 which are arranged up and down and have the same direction and the same period, the th sinusoidal grating 11 and the second sinusoidal 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 th sinusoidal grating 11 is installed between two brackets 13 through linear bearings, the two brackets 13 are symmetrically installed on the base 4, the linear bearings can ensure that the th sinusoidal grating 11 moves in a horizontal plane with a fixed height, the bottom of the th sinusoidal grating 11 is symmetrically provided with two transmission rods 15 with through grooves, the second sinusoidal grating 12 is installed between two second brackets 14 through linear bearings, the two second brackets 14 are symmetrically installed on the base 4, and the linear bearings can ensure that the second sinusoidal grating 12 moves in the horizontal plane with the fixed height;
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 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 a through groove of a transmission rod 15, and the protruding end 23 at the inner side is inserted into a through groove of a second transmission rod 16;
the power transmission device 3 comprises a motor 31 and a transmission rod 32 which coaxially rotates with the motor 31, the transmission rod 32 is supported by a transmission bracket 33 arranged on the base 4, and the 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
This embodiment is an embodiment of a contrast-continuously tuned grating.
The contrast-continuously-adjusted grating of this embodiment is further defined by step on the basis of 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 transmission rod 32 is supported by a transmission bracket 33 arranged on the base 4, and the specific structure is as follows: the transmission rod 32 is connected with the transmission bracket 33 through a bearing, the 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
This embodiment is an embodiment of a contrast-continuously tuned grating.
The structure diagram of the contrast-adjusting grating of this embodiment is shown in fig. 2, and the contrast-adjusting grating further defines that a light source 5 is further disposed below the second sinusoidal grating 12 on the basis of specific embodiment .
The structure design ensures that the contrast continuous adjustment grating can be directly matched with the light source 5 for use without an additional light source.
Detailed description of the invention
This embodiment is an embodiment of a contrast-continuously tuned grating.
The schematic structural diagram of the contrast continuously tunable grating of this embodiment is shown in fig. 3, and the contrast continuously tunable grating is further defined between the second sinusoidal grating 12 and the light source 5 based on 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
This example is an example of a contrast continuous adjustment method.
According to the contrast continuous adjustment method of the embodiment, the motor 31 rotates to drive the 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 -th sinusoidal grating 11 and the second sinusoidal grating 12 to move in opposite directions, so that the contrast continuous adjustment is realized.
Detailed description of the preferred embodiment
This example is an example of a contrast continuous adjustment method.
The continuous contrast adjusting method of this embodiment is further defined by , based on the fifth specific embodiment, including the following steps:
step a, adjusting th sinusoidal grating 11 and second sinusoidal grating 12
The two extending ends 23 of the two rotators 21 of the same sub-mechanism coincide the th sinusoidal grating 11 and the second sinusoidal grating 12 under the condition of being positioned on the same vertical plane;
step b, according to the following formula, adjusting the contrast
Wherein k is the contrast, C1Is the contrast of the th sinusoidal grating 11, C2For the contrast of the second sinusoidal grating 12, l is the same axle distance of the two extending ends 23 on the two rotators 21 of the sub-mechanism, and α is the rotation angle of the motor 31;
the specific derivation process is as follows:
the th sinusoidal grating 11 has an intensity expression:
the light intensity expression of the second sinusoidal grating 12 is:
after the motor 31 rotates through α degrees, the light intensity of the th sinusoidal grating 11 is expressed as:
after the motor 31 rotates through α degrees, the light intensity of the second sinusoidal grating 12 is expressed as:
the synthesized normalized light intensity expression is as follows:
the contrast is then:
the contrast continuous adjustment method of the embodiment of the invention provides the corresponding relation between the contrast and the rotation angle of the motor 31 based on the contrast continuous adjustment grating of the invention, and lays an experimental foundation for the specific operation of the contrast continuous adjustment method of the invention.
Detailed description of the preferred embodiment
This example is an example of a contrast continuous adjustment method.
The continuous contrast adjusting method of this embodiment is further defined by , based on the fifth specific embodiment, including the following steps:
step a, adjusting th sinusoidal grating 11 and second sinusoidal grating 12
The two extending ends 23 of the two rotators 21 of the same sub-mechanism coincide the th sinusoidal grating 11 and the second sinusoidal grating 12 under the condition of being positioned on the same vertical plane;
step b, according to the following formula, adjusting the contrast
Wherein k is contrast, C is contrast of the th sinusoidal grating 11 and the second sinusoidal grating 12, l is a distance between two extending ends 23 on two rotating bodies 21 of the same sub-mechanism, and α is a rotation angle of the motor 31;
the specific derivation process is as follows:
the th sinusoidal grating 11 and the second sinusoidal grating 12 have the following light intensity expressions:
after the motor 31 rotates through α degrees, the light intensity of the th sinusoidal grating 11 is expressed as:
after the motor 31 rotates through α degrees, the light intensity of the second sinusoidal grating 12 is expressed as:
the synthesized normalized light intensity expression is as follows:
the contrast is then:
the contrast continuous adjustment method of the embodiment of the invention provides the corresponding relation between the contrast and the rotation angle of the motor 31 based on the contrast continuous adjustment grating of the invention, and lays an experimental foundation for the specific operation of the contrast continuous adjustment method of the invention.
Claims (1)
1. The contrast continuous adjustment method of the contrast continuous adjustment grating is characterized in that the contrast continuous adjustment grating comprises an th sinusoidal grating (11) and a second sinusoidal grating (12) which are arranged up and down and have the same direction and the same period, the th sinusoidal grating (11) and the second sinusoidal 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 sinusoidal grating is characterized in that the sinusoidal grating (11) is installed between two brackets (13) through linear bearings, the two brackets (13) are symmetrically installed on the base (4), the linear bearings can ensure that the sinusoidal grating (11) moves in a horizontal plane with a fixed height, the bottom of the sinusoidal grating (11) is symmetrically provided with two transmission rods (15) with through grooves, the second sinusoidal grating (12) is installed between the two second brackets (14) through linear bearings, the two second brackets (14) are symmetrically installed on the base (4), the linear bearings can ensure that the second sinusoidal grating (12) moves in the horizontal plane with the fixed height, and the bottom of the second sinusoidal grating (12) is symmetrically provided with two second transmission rods (16) with the through grooves;
the grating adjusting mechanism (2) consists of two symmetrically arranged sub-mechanisms, each sub-mechanism comprises two coaxially arranged rotators (21), the rotators (21) are supported by rotator supports (24) arranged on a 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) positioned 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) positioned at the outer side is inserted into a through groove of a transmission rod (15), and the protruding end (23) positioned at the inner side is inserted into a through groove of a second transmission rod (16);
the power transmission device (3) comprises a motor (31) and a transmission rod (32) which coaxially rotates with the motor (31), the transmission rod (32) is supported by a transmission bracket (33) arranged on the base (4), and the 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 contrast continuous adjustment method, the motor (31) rotates to drive the transmission rod (32) to rotate, so that the rotating body (21) is driven to rotate, and the extension end (23) on the rotating body (21) drives the -th sinusoidal grating (11) and the second sinusoidal grating (12) to move in opposite directions, so that the contrast continuous adjustment is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810014147.4A CN108181721B (en) | 2016-07-24 | 2016-07-24 | Contrast continuous adjustment method of contrast continuous adjustment grating |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810014147.4A CN108181721B (en) | 2016-07-24 | 2016-07-24 | Contrast continuous adjustment method of contrast continuous adjustment grating |
| CN201610585597.XA CN106054372B (en) | 2016-07-24 | 2016-07-24 | A kind of contrast continuously adjusts grating and contrast method for continuously adjusting |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610585597.XA Division CN106054372B (en) | 2016-07-24 | 2016-07-24 | A kind of contrast continuously adjusts grating and contrast method for continuously adjusting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108181721A CN108181721A (en) | 2018-06-19 |
| CN108181721B true CN108181721B (en) | 2020-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810014147.4A Expired - Fee Related CN108181721B (en) | 2016-07-24 | 2016-07-24 | Contrast continuous adjustment method of contrast continuous adjustment grating |
| CN201610585597.XA Expired - Fee Related CN106054372B (en) | 2016-07-24 | 2016-07-24 | A kind of contrast continuously adjusts grating and contrast method for continuously adjusting |
| CN201810013943.6A Expired - Fee Related CN108319011B (en) | 2016-07-24 | 2016-07-24 | contrast continuous adjusting method |
| CN201810013832.5A Expired - Fee Related CN108594425B (en) | 2016-07-24 | 2016-07-24 | Contrast continuous adjusting method |
Family Applications After (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610585597.XA Expired - Fee Related CN106054372B (en) | 2016-07-24 | 2016-07-24 | A kind of contrast continuously adjusts grating and contrast method for continuously adjusting |
| CN201810013943.6A Expired - Fee Related CN108319011B (en) | 2016-07-24 | 2016-07-24 | contrast continuous adjusting method |
| CN201810013832.5A Expired - Fee Related CN108594425B (en) | 2016-07-24 | 2016-07-24 | Contrast continuous adjusting method |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100803A (en) * | 1994-07-08 | 1995-03-29 | 天津大学 | Optical grating displacement measuring device with single harmonic output |
| DE19507665A1 (en) * | 1995-03-04 | 1996-09-05 | Hell Ag Linotype | Exposure calibration and control procedures and exposure control strips |
| CN100494887C (en) * | 2006-05-22 | 2009-06-03 | 北京航空航天大学 | Sinusoidal fringe structural light projector based on acousto-optic deflection device |
| JP2012115621A (en) * | 2010-12-03 | 2012-06-21 | Fujifilm Corp | Radiological image detection apparatus, radiographic apparatus and radiographic system |
| JP2012148068A (en) * | 2010-12-27 | 2012-08-09 | Fujifilm Corp | Radiographic image obtainment method and radiographic apparatus |
| CN103048715A (en) * | 2013-01-04 | 2013-04-17 | 南京邮电大学 | Planar sub-wavelength aperiodic high-contrast grating and preparation method thereof |
| CN104765099B (en) * | 2015-04-29 | 2018-02-02 | 北京航空航天大学 | A kind of device and method for inscribing cycle adjustable optic fibre grating |
| CN205809411U (en) * | 2016-07-24 | 2016-12-14 | 哈尔滨理工大学 | A kind of contrast continuously adjusts grating |
-
2016
- 2016-07-24 CN CN201810014147.4A patent/CN108181721B/en not_active Expired - Fee Related
- 2016-07-24 CN CN201610585597.XA patent/CN106054372B/en not_active Expired - Fee Related
- 2016-07-24 CN CN201810013943.6A patent/CN108319011B/en not_active Expired - Fee Related
- 2016-07-24 CN CN201810013832.5A patent/CN108594425B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN108594425A (en) | 2018-09-28 |
| CN108181721A (en) | 2018-06-19 |
| CN106054372B (en) | 2018-04-03 |
| CN106054372A (en) | 2016-10-26 |
| CN108319011A (en) | 2018-07-24 |
| CN108319011B (en) | 2020-01-31 |
| CN108594425B (en) | 2020-03-06 |
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