CN108181721A - Contrast continuously adjusts the contrast method for continuously adjusting of grating - Google Patents

Contrast continuously adjusts the contrast method for continuously adjusting of grating Download PDF

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Publication number
CN108181721A
CN108181721A CN201810014147.4A CN201810014147A CN108181721A CN 108181721 A CN108181721 A CN 108181721A CN 201810014147 A CN201810014147 A CN 201810014147A CN 108181721 A CN108181721 A CN 108181721A
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CN
China
Prior art keywords
grating
contrast
sinusoidal grating
sinusoidal
continuously
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Application number
CN201810014147.4A
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Chinese (zh)
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CN108181721B (en
Inventor
赵烟桥
何宝华
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Harbin University of Science and Technology
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Harbin University of Science and Technology
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Priority to CN201810014147.4A priority Critical patent/CN108181721B/en
Publication of CN108181721A publication Critical patent/CN108181721A/en
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/42Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
    • G02B27/44Grating systems; Zone plate systems
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00Optical devices or arrangements for the control of light using movable or deformable optical elements
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/18Diffraction gratings
    • G02B5/1828Diffraction gratings having means for producing variable diffraction
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00Mountings, 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)
  • Projection Apparatus (AREA)

Abstract

The contrast method for continuously adjusting that contrast of the present invention continuously adjusts grating belongs to optics, field of precision instruments;The contrast continuously adjusts grating, including the first sinusoidal grating and the second sinusoidal grating that direction setting up and down is identical, cycle phase is same, the counter motion under the adjusting of grating regulating mechanism of first sinusoidal grating and the second sinusoidal grating, the grating regulating mechanism provide power by the power transmission being mounted on pedestal;The contrast method for continuously adjusting by controlling the rotation of motor in power transmission, drives drive rod rotation, and then drive swivel rotation, the first sinusoidal grating and the second sinusoidal grating counter motion is driven by the external part on swivel, realize that contrast continuously adjusts;Under the structure of the present invention, motor can be controlled to rotate at any time according to actual needs, make the first sinusoidal grating and the continuous counter motion of the second sinusoidal grating, realize that contrast is continuously adjusted in real time.

Description

Contrast continuously adjusts the contrast method for continuously adjusting of grating
The application is application for a patent for invention《A kind of contrast continuously adjusts grating and contrast method for continuously adjusting》Point Case application.
The original bill applying date:2016-07-24.
Original bill application number:201610585597X.
Original bill denomination of invention:A kind of contrast continuously adjusts grating and contrast method for continuously adjusting.
Technical field
The contrast method for continuously adjusting that contrast of the present invention continuously adjusts grating belongs to optics, field of precision instruments.
Background technology
The optical device being made of a large amount of wide equidistant parallel slits is known as grating.Common grating is in sheet glass On carve a large amount of parallel scores and be made, indentation is lightproof part, and the smooth part between two indentations can be equivalent to narrow with light transmission Slot array.Although grating structure is uncomplicated, extensive use is respectively provided in numerous optical instruments, also plays crucial work With.
The grating come, since transmitance will not change, the comparison under identical intensity of illumination are carved on the glass sheet It spends for fixed value, if it is possible to change contrast as needed in application process, then this grating will have more extensively Application, play the effect of bigger, play more revolutionary impact.However, finding contrast not yet can continuously adjust Grating.
Invention content
In view of the above-mentioned problems, the invention discloses a kind of contrasts to continuously adjust grating and contrast method for continuously adjusting, It can realize the technical purpose that contrast continuously adjusts.
A kind of contrast continuously adjusts grating, including the first sinusoidal grating that direction setting up and down is identical, cycle phase is same With the second sinusoidal grating, the counter motion under the adjusting of grating regulating mechanism of first sinusoidal grating and the second sinusoidal grating, The grating regulating mechanism provides power by the power transmission being mounted on pedestal;
Between first sinusoidal grating is mounted on two first supports by linear bearing, described two first supports It is symmetrically mounted on pedestal, the linear bearing can be ensured that horizontal in-plane moving of first sinusoidal grating in level altitude;The One sinusoidal grating bottom symmetrical sets two first drive links with straight slot;Second sinusoidal grating is pacified by linear bearing Between two second supports, described two second supports are symmetrically mounted on pedestal, and the linear bearing can be ensured that Second sinusoidal grating is in the horizontal in-plane moving of level altitude;Second sinusoidal grating bottom symmetrical, which sets two, has the of straight slot Two drive links;
The grating regulating mechanism is made of symmetrically arranged two clamp mechanisms, and each clamp mechanism includes two coaxial arrangements Swivel, the swivel supports by the swivel stent that is mounted on pedestal;It is connected between two swivels by shaft, it is each to turn Outside be both provided with external part, two external parts on two swivels of same clamp mechanism are arranged on swivel diameter of section Both ends, the external part positioned at outside are inserted into the straight slot of the first drive link, and the external part positioned inside is inserted into the second drive link In straight slot;
The power transmission includes motor and the drive link with motor coaxle rotation, and the drive link is by being mounted on bottom Transmission bracket support on seat, drive link is connect with shaft bearing or belt connection, imparts power to shaft.
Above-mentioned contrast continuously adjusts grating,
Swivel is supported by the swivel stent being mounted on pedestal, and concrete structure is:Bearing between swivel and swivel stent Connection, swivel are interference fitted with bearing inner ring, and swivel stent is fixedly connected with outer race;
Drive link is supported by the transmission bracket being mounted on pedestal, and concrete structure is:Between drive link and transmission bracket Bearing connects, and drive link is interference fitted with bearing inner ring, and transmission bracket is fixedly connected with outer race.
More than contrast continuously adjusts grating, and light source is additionally provided with below the second sinusoidal grating.
Between the second sinusoidal grating and light source, it is additionally provided with diffusing transmission plate.
It is a kind of that the contrast method for continuously adjusting realized on grating is continuously adjusted in above-mentioned contrast, it is rotated by motor, Drive rod rotation is driven, and then drives swivel rotation, the first sinusoidal grating and the second sinusoidal light are driven by the external part on swivel Grid counter motion realizes that contrast continuously adjusts.
Above-mentioned contrast method for continuously adjusting, includes the following steps:
Step a, the first sinusoidal grating and the second sinusoidal grating are adjusted
Two external parts on same two swivels of clamp mechanism make the first sine in the case of positioned at same perpendicular Grating and the second sinusoidal grating overlap;
Step b, according to equation below, contrast is adjusted
Wherein, k is contrast, C1For the contrast of the first sinusoidal grating, C2For the contrast of the second sinusoidal grating, l is same The wheelbase of two external parts on one clamp mechanism two swivel, α are the corner of motor;
Specific derivation process is:
The light intensity expression of first sinusoidal grating is:
The light intensity expression of second sinusoidal grating is:
After motor turns over α angles, the light intensity expression of the first sinusoidal grating is:
After motor turns over α angles, the light intensity expression of the second sinusoidal grating is:
Normalization light intensity expression after synthesis is:
Then contrast is:
Above-mentioned contrast method for continuously adjusting, includes the following steps:
Step a, the first sinusoidal grating and the second sinusoidal grating are adjusted
Two external parts on same two swivels of clamp mechanism make the first sine in the case of positioned at same perpendicular Grating and the second sinusoidal grating overlap;
Step b, according to equation below, contrast is adjusted
Wherein, k is contrast, and C is the contrast of the first sinusoidal grating and the second sinusoidal grating, and l is same clamp mechanism two The wheelbase of two external parts on a swivel, α are the corner of motor;
Specific derivation process is:
The light intensity expression of first sinusoidal grating and the second sinusoidal grating is:
After motor turns over α angles, the light intensity expression of the first sinusoidal grating is:
After motor turns over α angles, the light intensity expression of the second sinusoidal grating is:
Normalization light intensity expression after synthesis is:
Then contrast is:
Advantageous effect:Under the structure of the present invention, it is only necessary to motor be controlled to rotate, it will be able to make the first sinusoidal grating and the Two sinusoidal grating counter motions, and then realize contrast adjustment;Simultaneously as the fortune of the first sinusoidal grating and the second sinusoidal grating Dynamic rail mark is continuous, therefore contrast adjustment is also continuous;And during use, due to can be according to actual needs Control motor rotation at any time, therefore contrast adjustment is real-time;In conclusion there is the present invention contrast continuously to adjust in real time Technical advantage.
Description of the drawings
Fig. 1 is the structure diagram that contrast of the present invention continuously adjusts grating specific embodiment one.
Fig. 2 is the structure diagram that contrast of the present invention continuously adjusts grating specific embodiment three.
Fig. 3 is the structure diagram that contrast of the present invention continuously adjusts grating specific embodiment four.
In figure:11 first sinusoidal gratings, 12 second sinusoidal gratings, 13 first supports, 14 second supports, 15 first transmissions Bar, 16 second drive links, 2 grating regulating mechanisms, 21 swivels, 22 shafts, 23 external parts, 24 swivel stents, 3 power transmit dress Put, 31 motors, 32 drive links, 33 transmission brackets, 4 pedestals, 5 light sources, 6 diffusing transmission plates.
Specific embodiment
The specific embodiment of the invention is described in further detail below in conjunction with the accompanying drawings.
Specific embodiment one
The present embodiment continuously adjusts the embodiment of grating for contrast.
The contrast of the present embodiment continuously adjusts grating, and structure diagram is as shown in Figure 1.The contrast continuously adjusts grating It is sinusoidal including the first sinusoidal grating 11 and the second sinusoidal grating 12 that direction setting up and down is identical, cycle phase is same, described first 11 and second counter motion under the adjusting of grating regulating mechanism 2 of sinusoidal grating 12 of grating, the grating regulating mechanism 2 is by installing Power transmission 3 on pedestal 4 provides power;
Between first sinusoidal grating 11 is mounted on two first supports 13 by linear bearing, described two first Stent 13 is symmetrically mounted on pedestal 4, and the linear bearing can be ensured that horizontal plane of first sinusoidal grating 11 in level altitude Interior movement;First sinusoidal grating, 11 bottom symmetrical sets two first drive links 15 with straight slot;Second sinusoidal grating Between 12 are mounted on two second supports 14 by linear bearing, described two second supports 14 are symmetrically mounted on pedestal 4, The linear bearing can be ensured that horizontal in-plane moving of second sinusoidal grating 12 in level altitude;Second sinusoidal grating, 12 bottom It is symmetrical arranged two second drive links 16 with straight slot;
The grating regulating mechanism 2 is made of symmetrically arranged two clamp mechanisms, and each clamp mechanism is coaxially set including two The swivel 21 put, the 21 swivel stent 24 by being mounted on pedestal 4 of the swivel support;Pass through shaft 22 between two swivels 21 Connection, the outside of each swivel 21 are both provided with external part 23, two external parts on same two swivels 21 of clamp mechanism 23 are arranged on the both ends of 21 diameter of sections of swivel, and the external part 23 positioned at outside is inserted into the straight slot of the first drive link 15, is located at The external part 23 of inside is inserted into the straight slot of the second drive link 16;
The power transmission 3 includes motor 31 and the drive link 32 with 31 coaxial rotating of motor, the drive link 32 It is supported by the transmission bracket 33 being mounted on pedestal 4, drive link 32 is connect with 22 bearing of shaft or belt connection, and power is transmitted To shaft 22.
Specific embodiment two
The present embodiment continuously adjusts the embodiment of grating for contrast.
The contrast of the present embodiment continuously adjusts grating, on the basis of specific embodiment one, further limits:
The 21 swivel stent 24 by being mounted on pedestal 4 of swivel supports, and concrete structure is:Swivel 21 and swivel stent 24 Between bearing connect, swivel 21 with bearing inner ring be interference fitted, swivel stent 24 be fixedly connected with outer race;
Drive link 32 is supported by the transmission bracket 33 being mounted on pedestal 4, and concrete structure is:Drive link 32 and transmission branch Bearing connects between frame 33, and drive link 32 is interference fitted with bearing inner ring, and transmission bracket 33 is fixedly connected with outer race.
Specific embodiment three
The present embodiment continuously adjusts the embodiment of grating for contrast.
The contrast of the present embodiment continuously adjusts grating, and structure diagram is as shown in Fig. 2, the contrast continuously adjusts light Grid on the basis of specific embodiment one, further limit 12 lower section of the second sinusoidal grating and are additionally provided with light source 5.
This structure design so that contrast of the present invention, which continuously adjusts grating, light source 5 directly to be coordinated to use, without Additional light source.
Specific embodiment four
The present embodiment continuously adjusts the embodiment of grating for contrast.
The contrast of the present embodiment continuously adjusts grating, and structure diagram is as shown in figure 3, the contrast continuously adjusts light Grid on the basis of specific embodiment three, are further limited between the second sinusoidal grating 12 and light source 5, are additionally provided with unrestrained saturating Penetrate plate 6.
Light source 5 sends out light beam, after diffusing transmission plate 6, then is irradiated on the second rectangular raster 12, this structure design, The illumination light that can make the second rectangular raster 12 is more uniform, can solve to reduce asking for experiment effect due to illumination light is uneven Topic.Specific embodiment five
The present embodiment is the embodiment of contrast method for continuously adjusting.
The contrast method for continuously adjusting of the present embodiment, is rotated by motor 31, and drive link 32 is driven to rotate, and then is driven 21 rotation of swivel, 12 counter motion of the first sinusoidal grating 11 and the second sinusoidal grating is driven by the external part 23 on swivel 21, real Existing contrast continuously adjusts.
Specific embodiment six
The present embodiment is the embodiment of contrast method for continuously adjusting.
The contrast method for continuously adjusting of the present embodiment, on the basis of specific embodiment five, further limit include with Lower step:
Step a, the first sinusoidal grating 11 and the second sinusoidal grating 12 are adjusted
Two external parts 23 on same two swivels 21 of clamp mechanism make first in the case of positioned at same perpendicular 11 and second sinusoidal grating 12 of sinusoidal grating overlaps;
Step b, according to equation below, contrast is adjusted
Wherein, k is contrast, C1For the contrast of the first sinusoidal grating 11, C2For the contrast of the second sinusoidal grating 12, l For the wheelbase of two external parts 23 on same two swivels 21 of clamp mechanism, α is the corner of motor 31;
Specific derivation process is:
The light intensity expression of first sinusoidal grating 11 is:
The light intensity expression of second sinusoidal grating 12 is:
After motor 31 turns over α angles, the light intensity expression of the first sinusoidal grating 11 is:
After motor 31 turns over α angles, the light intensity expression of the second sinusoidal grating 12 is:
Normalization light intensity expression after synthesis is:
Then contrast is:
The contrast method for continuously adjusting of the present embodiment continuously adjusts grating based on contrast of the present invention, gives comparison Experiment base has been established in correspondence between degree and 31 corner of motor, the concrete operations for contrast method for continuously adjusting of the present invention Plinth.
Specific embodiment seven
The present embodiment is the embodiment of contrast method for continuously adjusting.
The contrast method for continuously adjusting of the present embodiment, on the basis of specific embodiment five, further limit include with Lower step:
Step a, the first sinusoidal grating 11 and the second sinusoidal grating 12 are adjusted
Two external parts 23 on same two swivels 21 of clamp mechanism make first in the case of positioned at same perpendicular 11 and second sinusoidal grating 12 of sinusoidal grating overlaps;
Step b, according to equation below, contrast is adjusted
Wherein, k is contrast, and C is the contrast of the first sinusoidal grating 11 and the second sinusoidal grating 12, and l is same handset The wheelbase of two external parts 23 on two swivels 21 of structure, α are the corner of motor 31;
Specific derivation process is:
The light intensity expression of first sinusoidal grating 11 and the second sinusoidal grating 12 is:
After motor 31 turns over α angles, the light intensity expression of the first sinusoidal grating 11 is:
After motor 31 turns over α angles, the light intensity expression of the second sinusoidal grating 12 is:
Normalization light intensity expression after synthesis is:
Then contrast is:
The contrast method for continuously adjusting of the present embodiment continuously adjusts grating based on contrast of the present invention, gives comparison Experiment base has been established in correspondence between degree and 31 corner of motor, the concrete operations for contrast method for continuously adjusting of the present invention Plinth.

Claims (1)

1. contrast continuously adjusts the contrast method for continuously adjusting of grating, peculiar to be, the contrast continuously adjusts grating Including direction setting up and down is identical, cycle phase with the first sinusoidal grating (11) and the second sinusoidal grating (12), described first Sinusoidal grating (11) and the second sinusoidal grating (12) counter motion under the adjusting of grating regulating mechanism (2), the grating are adjusted Mechanism (2) provides power by the power transmission (3) being mounted on pedestal (4);
Between first sinusoidal grating (11) is mounted on two first supports (13) by linear bearing, described two first Stent (13) is symmetrically mounted on pedestal (4), and the linear bearing can be ensured that the first sinusoidal grating (11) in level altitude Horizontal in-plane moving;First sinusoidal grating (11) bottom symmetrical sets two first drive links (15) with straight slot;Described For two sinusoidal gratings (12) by linear bearing between two second supports (14), described two second supports (14) are right Claim to be mounted on pedestal (4), the linear bearing can be ensured that the second sinusoidal grating (12) is transported in the horizontal plane of level altitude It is dynamic;Second sinusoidal grating (12) bottom symmetrical sets two second drive links (16) with straight slot;
The grating regulating mechanism (2) is made of symmetrically arranged two clamp mechanisms, and each clamp mechanism includes two coaxial arrangements Swivel (21), the swivel (21) supports by the swivel stent (24) that is mounted on pedestal (4);Lead between two swivels (21) Shaft (22) connection is crossed, each turn is both provided with external part (23) on the outside of (21), positioned at same two swivels of clamp mechanism (21) two external parts (23) on are arranged on the both ends of swivel (21) diameter of section, and the external part (23) positioned at outside is inserted into the In the straight slot of one drive link (15), the external part (23) positioned inside is inserted into the straight slot of the second drive link (16);
Drive link (32) of the power transmission (3) including motor (31) and with motor (31) coaxial rotating, the transmission Bar (32) is supported by the transmission bracket (33) being mounted on pedestal (4), and drive link (32) is connect with shaft (22) bearing or belt Connection, imparts power to shaft (22);
The contrast method for continuously adjusting is rotated by motor (31), and drive link (32) is driven to rotate, and then drives swivel (21) it rotates, the first sinusoidal grating (11) and the second sinusoidal grating (12) is driven reversely to transport by the external part (23) turned on (21) It is dynamic, realize that contrast continuously adjusts.
CN201810014147.4A 2016-07-24 2016-07-24 Contrast continuous adjustment method of contrast continuous adjustment grating Expired - Fee Related CN108181721B (en)

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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

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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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CN201810013832.5A Expired - Fee Related CN108594425B (en) 2016-07-24 2016-07-24 Contrast continuous adjusting method

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Citations (6)

* Cited by examiner, † Cited by third party
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
US20120163537A1 (en) * 2010-12-27 2012-06-28 Fujifilm Corporation 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

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
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
US20120163537A1 (en) * 2010-12-27 2012-06-28 Fujifilm Corporation 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

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Publication number Publication date
CN108594425B (en) 2020-03-06
CN108594425A (en) 2018-09-28
CN108319011B (en) 2020-01-31
CN106054372B (en) 2018-04-03
CN108319011A (en) 2018-07-24
CN106054372A (en) 2016-10-26
CN108181721B (en) 2020-01-31

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