CN108594425B - Contrast continuous adjusting method - Google Patents
Contrast continuous adjusting method Download PDFInfo
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- CN108594425B CN108594425B CN201810013832.5A CN201810013832A CN108594425B CN 108594425 B CN108594425 B CN 108594425B CN 201810013832 A CN201810013832 A CN 201810013832A CN 108594425 B CN108594425 B CN 108594425B
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- sinusoidal grating
- grating
- contrast
- sinusoidal
- motor
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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
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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
Abstract
The invention relates to a contrast continuous adjusting method, belonging to the field of optical and precision instruments; the contrast continuous adjustment grating comprises a first sinusoidal grating and a second sinusoidal grating which are arranged up and down and have the same direction and the same period, wherein the first sinusoidal grating and the second sinusoidal grating move in opposite directions under the adjustment of a grating adjustment mechanism, and the grating adjustment mechanism is powered by a power transmission device arranged on a base; according to the contrast continuous adjustment method, the rotation of a motor in the power transmission device is controlled to drive the transmission rod to rotate so as to drive the rotating body to rotate, and the extension end on the rotating body drives the first sinusoidal grating and the second sinusoidal grating to move in opposite directions, so that the contrast 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 sinusoidal grating and the second sinusoidal grating continuously move in opposite directions, and the continuous real-time adjustment of the contrast is realized.
Description
The application is a divisional application of the invention patent application 'a contrast continuous adjustment grating and a contrast continuous adjustment method'.
Application date of the original case: 2016-07-24.
Original application No.: 201610585597X.
The name of the original invention is: a contrast continuous adjustment grating and a contrast continuous adjustment method.
Technical Field
The invention relates to a contrast continuous adjusting method, belonging to the field of optics 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 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 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 continuously adjustable contrast.
Disclosure of Invention
Aiming at the problems, the invention discloses a contrast continuous adjustment grating and a contrast continuous adjustment method, which can realize the technical purpose of contrast continuous adjustment.
A contrast continuous adjustment grating comprises a first sinusoidal grating and a second sinusoidal grating which are arranged up and down and have the same direction and the same period, wherein the first sinusoidal grating and the second sinusoidal grating move in opposite directions under the adjustment of a grating adjustment mechanism, and the grating adjustment mechanism is powered by a power transmission device arranged on a base;
the first sinusoidal grating is arranged between the two first supports through linear bearings, the two first supports are symmetrically arranged on the base, and the linear bearings can ensure that the first sinusoidal grating moves in a horizontal plane with a fixed height; the bottom of the first sinusoidal grating is symmetrically provided with two first transmission rods with through grooves; the second sinusoidal grating is arranged between the two second supports through a linear bearing, the two second supports are symmetrically arranged on the base, and the linear bearing can ensure that the second sinusoidal 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 sinusoidal 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 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 motor rotates to drive a transmission rod to rotate, so that a rotating body is driven to rotate, and a first sinusoidal grating and a second sinusoidal grating are driven to move in opposite directions by an extending end on the rotating body, so that the contrast is continuously adjusted.
The contrast continuous adjusting method comprises the following steps:
step a, adjusting a first sinusoidal grating and a 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 first 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 ratio of the first sinusoidal grating, C2The contrast of the second sinusoidal grating is shown, l is the axial distance of two extending ends on two rotating bodies of the same sub-mechanism, and α is the rotating angle of the motor;
the specific derivation process is as follows:
the light intensity expression of the first sinusoidal grating is as follows:
the light intensity expression of the second sinusoidal grating is as follows:
after the motor rotates α degrees, the light intensity expression of the first 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 a first sinusoidal grating and a 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 first 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 the first sinusoidal grating and the second sinusoidal grating, l is the wheel base 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 light intensity expressions of the first sinusoidal grating and the second sinusoidal grating are both:
after the motor rotates α degrees, the light intensity expression of the first 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:
has the advantages that: under the structure of the invention, the first sinusoidal grating and the second sinusoidal grating can move in opposite directions only by controlling the rotation of the motor, thereby realizing contrast adjustment; meanwhile, the motion tracks of the first sinusoidal grating and the second sinusoidal grating are continuous, so that the contrast 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 contrast adjustment is real-time; in summary, the present invention has the technical advantage of continuous real-time contrast adjustment.
Drawings
Fig. 1 is a schematic structural diagram of a contrast-continuously-adjusting grating according to a first 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: 11 first sinusoidal grating, 12 second sinusoidal grating, 13 first bracket, 14 second bracket, 15 first transmission rod, 16 second transmission rod, 2 grating adjusting mechanism, 21 rotator, 22 rotating shaft, 23 extending end, 24 rotator bracket, 3 power transmission device, 31 motor, 32 transmission rod, 33 transmission bracket, 4 base, 5 light source, 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
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. 1. The contrast continuous adjustment grating comprises a first sinusoidal grating 11 and a second sinusoidal grating 12 which are arranged up and down and have the same direction and the same period, wherein the first 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 first sinusoidal grating 11 is installed between two first supports 13 through linear bearings, the two first supports 13 are symmetrically installed on the base 4, and the linear bearings can ensure that the first sinusoidal 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 sinusoidal grating 11; 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 a horizontal plane with a fixed height; two second transmission rods 16 with through grooves are symmetrically arranged at the bottom of the second sinusoidal 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 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 continuous adjustment grating of the present embodiment is further defined 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 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 schematic structural diagram of the contrast continuous adjustment 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 sinusoidal grating 12.
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 adjusting grating of this embodiment is shown in fig. 3, and the contrast continuously adjusting grating is further defined between the second sinusoidal 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
This example is an example of a contrast continuous adjustment method.
In the contrast continuous adjustment method of this embodiment, the motor 31 rotates to drive the transmission rod 32 to rotate, and further drives the rotator 21 to rotate, and the extension end 23 on the rotator 21 drives the first sinusoidal grating 11 and the second sinusoidal grating 12 to move in opposite directions, so as to achieve contrast continuous adjustment.
Detailed description of the preferred embodiment
This example is an example of a contrast continuous adjustment method.
The contrast continuous adjustment method of the embodiment is further limited to include, on the basis of the fifth specific embodiment, the following steps:
step a, adjusting a first sinusoidal grating 11 and a second sinusoidal 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 sinusoidal grating 11 and the second sinusoidal grating 12 are superposed;
step b, according to the following formula, adjusting the contrast
Wherein k is the contrast, C1Is the contrast of the first sinusoidal grating 11, C2Is a second sinusoidal grating12, the contrast l is the wheel base of two extending ends 23 on two rotating bodies 21 of the same sub-mechanism, and α is the rotating angle of the motor 31;
the specific derivation process is as follows:
the light intensity expression of the first sinusoidal grating 11 is:
the light intensity expression of the second sinusoidal grating 12 is:
after the motor 31 rotates through α degrees, the light intensity of the first 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 contrast continuous adjustment method of the embodiment is further limited to include, on the basis of the fifth specific embodiment, the following steps:
step a, adjusting a first sinusoidal grating 11 and a second sinusoidal 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 sinusoidal grating 11 and the second sinusoidal grating 12 are superposed;
step b, according to the following formula, adjusting the contrast
Wherein k is the contrast, C is the contrast of the first sinusoidal grating 11 and the second sinusoidal grating 12, l is the axial distance of the two extending ends 23 on the two rotating bodies 21 of the same sub-mechanism, and α is the rotation angle of the motor 31;
the specific derivation process is as follows:
the light intensity expressions of the first sinusoidal grating 11 and the second sinusoidal grating 12 are both:
after the motor 31 rotates through α degrees, the light intensity of the first 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. A method for continuously adjusting the contrast ratio of a liquid crystal display,
it is characterized in that the preparation method is characterized in that,
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 first sinusoidal grating (11) and the second sinusoidal grating (12) to move in opposite directions, so that the contrast ratio is continuously adjusted; the first sinusoidal grating (11) and the second sinusoidal grating (12) are arranged up and down, and have the same direction and the same period;
the method comprises the following steps:
step a, adjusting a first sinusoidal grating (11) and a second sinusoidal grating (12)
Under the condition that two extending ends (23) on two rotating bodies (21) of the same sub-mechanism are positioned on the same vertical plane, the first sinusoidal grating (11) and the second sinusoidal grating (12) are superposed;
step b, according to the following formula, adjusting the contrast
Wherein k is contrast, C is contrast of the first sinusoidal grating (11) and the second sinusoidal grating (12), l is the axial distance of two extending ends (23) on two rotating bodies (21) of the same sub-mechanism, and α is a rotating angle of the motor (31);
the specific derivation process is as follows:
the light intensity expressions of the first sinusoidal grating (11) and the second sinusoidal grating (12) are both as follows:
after the motor (31) rotates for α degrees, the light intensity of the first sinusoidal grating (11) is expressed as:
after the motor (31) rotates for 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:
and (6) ending.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810013832.5A CN108594425B (en) | 2016-07-24 | 2016-07-24 | Contrast continuous adjusting method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810013832.5A CN108594425B (en) | 2016-07-24 | 2016-07-24 | Contrast continuous adjusting method |
| 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 |
|---|---|
| CN108594425A CN108594425A (en) | 2018-09-28 |
| CN108594425B true CN108594425B (en) | 2020-03-06 |
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| 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 |
| CN201810014147.4A Expired - Fee Related CN108181721B (en) | 2016-07-24 | 2016-07-24 | Contrast continuous adjustment method of contrast continuous adjustment grating |
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| 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 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810014147.4A Expired - Fee Related CN108181721B (en) | 2016-07-24 | 2016-07-24 | Contrast continuous adjustment method of contrast continuous adjustment grating |
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Citations (5)
| 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 |
| US5748331A (en) * | 1995-03-04 | 1998-05-05 | Linotype-Hell Ag | Process control strip and method for recording |
| CN1888818A (en) * | 2006-05-22 | 2007-01-03 | 北京航空航天大学 | Sinusoidal fringe structural optical 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 |
| 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 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012148068A (en) * | 2010-12-27 | 2012-08-09 | Fujifilm Corp | Radiographic image obtainment method and radiographic apparatus |
| 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 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
- 2016-07-24 CN CN201810014147.4A patent/CN108181721B/en not_active Expired - Fee Related
Patent Citations (5)
| 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 |
| US5748331A (en) * | 1995-03-04 | 1998-05-05 | Linotype-Hell Ag | Process control strip and method for recording |
| CN1888818A (en) * | 2006-05-22 | 2007-01-03 | 北京航空航天大学 | Sinusoidal fringe structural optical 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108181721B (en) | 2020-01-31 |
| CN106054372B (en) | 2018-04-03 |
| CN106054372A (en) | 2016-10-26 |
| CN108319011A (en) | 2018-07-24 |
| CN108319011B (en) | 2020-01-31 |
| CN108594425A (en) | 2018-09-28 |
| CN108181721A (en) | 2018-06-19 |
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