CN109827657A - A kind of method and apparatus measuring fresh laser material grating constant - Google Patents
A kind of method and apparatus measuring fresh laser material grating constant Download PDFInfo
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- CN109827657A CN109827657A CN201910185872.2A CN201910185872A CN109827657A CN 109827657 A CN109827657 A CN 109827657A CN 201910185872 A CN201910185872 A CN 201910185872A CN 109827657 A CN109827657 A CN 109827657A
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- 239000000463 material Substances 0.000 title claims abstract description 130
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000012634 optical imaging Methods 0.000 claims abstract description 26
- 238000005286 illumination Methods 0.000 claims abstract description 13
- 235000012149 noodles Nutrition 0.000 claims abstract description 12
- 238000004040 coloring Methods 0.000 claims abstract description 7
- 238000005259 measurement Methods 0.000 claims description 29
- 238000003384 imaging method Methods 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 6
- 238000011065 in-situ storage Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052705 radium Inorganic materials 0.000 claims description 3
- HCWPIIXVSYCSAN-UHFFFAOYSA-N radium atom Chemical compound [Ra] HCWPIIXVSYCSAN-UHFFFAOYSA-N 0.000 claims description 3
- 239000000523 sample Substances 0.000 description 48
- 230000000694 effects Effects 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 241001062009 Indigofera Species 0.000 description 1
- 238000005269 aluminizing Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000004456 color vision Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The present invention relates to a kind of method and apparatus for measuring fresh laser material grating constant.It is placed first on setting sample platform and fixes vegetarian noodles radium-shine material；Selection illumination point light source, lighting source is set to sample to be tested normal to a surface side, optical imaging lens and ccd detector are set to sample to be tested normal to a surface direction, ccd detector and optical imaging lens are connect with computer, and the capture of color image is carried out by computer control software；Using the receiving direction of optical imaging lens and ccd detector as axis, the related fresh laser material horizontal thereon of sample platform will be set and rotate 45 °, carry out the capture of color image again；Changed according to the colouring information of the chromatic image twice captured, the grating constant range of fresh laser material to be tested is calculated in conjunction with grating equation.Fresh laser material grating constant is measured using the method for the present invention and device, can quickly, conveniently obtain the grating constant range of fresh laser material.
Description
Technical field
The present invention relates to a kind of method and apparatus for measuring fresh laser material grating constant, are adopted using this method and device
Collect fresh laser material surface no marking, without the image at set-off position after light source irradiates, passes through computer and control software
The RGB image for obtaining area to be illuminated domain calculates the grating constant of fresh laser material with calculating processing software in conjunction with grating equation
Range.
Background technique
Laser paper can be transferred by radium-shine material, be formed after processing, bright rainbow effect be presented under light illumination, in packages printing
Field extensive application.Different types of laser paper can generate different color effects, mainly not by its microstructure
With caused by, but human eye can not distinguish the laser paper i.e. microstructure of its related radium-shine material.
When carrying out radium-shine material microstructure (grating constant) measurement, laser co-focusing topography measurement microscope can be selected
It is directly observed with super depth of field 3 D video microscope, but equipment cost is higher, it can not be extensive in Packaging and Printing Enterprises
Using.
104330240 B of patent CN proposes a kind of normal using multi-angle spectrophotometer measurement light beam laser paper grating
Several methods.But due to the microstructure of light beam radium-shine material be it is one-dimensional, the optical grating construction of fresh laser material is x, the direction y
It is two-dimensional, so the method for being used to measure two kinds of radium-shine material grating constants can not be general.
Patent CN106950182A proposes a kind of method for differentiating different fresh laser material microstructures, but is surveying
The chromatic value L of first capturing material is needed when amount*, pass through L*The initial position of different fresh laser materials is adjusted, and is needed with polygonal
Spectrophotometer measurement is spent, price is higher, needs to rotate radium-shine material in measurement, using also more inconvenient.Based on this, how
More rapidly, the grating constant range for easily obtaining laser paper is the critical issue for needing to solve at present.
Summary of the invention
In order to quickly and easily realize that the present invention provides one kind to the measurement of the microcosmic grating constant of fresh laser material
Method and apparatus can be changed using this method and device according to fresh laser material color to calculate its grating constant range.
The grating constant that detects fresh laser material is avoided using this method and device using high magnification numbe magnifying glass and using polygonal
It spends the color measurement instruments such as spectrophotometer and calculates grating constant.
To achieve the above object, the present invention takes following technical scheme:
A method of measurement fresh laser material grating constant includes the following steps:
(1) it is placed on setting sample platform and fixes vegetarian noodles radium-shine material；
(2) selection illumination point light source, is set to sample to be tested normal to a surface side for lighting source, by optical imaging lens
Head and ccd detector are set to sample to be tested normal to a surface direction, ccd detector and optical imaging lens and computer connects
It connects, the capture of color image is carried out by computer control software；
(3) using the receiving direction of optical imaging lens and ccd detector as axis, the related fresh laser thereon of sample platform will be set
Material horizontal rotates 45 °, carries out the capture of color image again；
(4) it according to the variation of the colouring information of the chromatic image twice captured, is calculated in conjunction with grating equation to be tested
The grating constant range of fresh laser material.
In step (1), it is described set sample platform can set sample platform and sample institute in the horizontal plane around center clockwise or the inverse time
Needle direction rotates 45 °, and white-light illuminating light source is radiated at the center for setting sample platform；The fresh laser Materials Measurement region selected for appoint
One without obvious scratch, the flattened region without set-off as image acquisition region, in order to avoid dirty part to acquisition figure
The interference of the color effects of picture.
In step (2), the lighting source is white light point light source, and lighting source colour temperature is 5000-6500k, and having can
Continuous spectrum distribution in light-exposed range.
The incident angle of the lighting source is the light and sample to be tested surface normal direction (method that lighting source issues
Line refers to the straight line perpendicular to sample to be tested surface) angle α, to avoid influence of the firsts and seconds diffraction light to color of image,
The variation range of light angle α can be 15 ° -30 °.
It in the above-mentioned methods further include collimation lens, collimation lens is set in the optical path of lighting source (lighting source warp
Cross after lens are assembled and reach sample), the light that the lighting source issues is focused at by collimation lens more to be concentrated
Range illumination is on fresh laser material.
The luminous intensity of lighting source and the photosensitive property of industry color CCD and optical imaging lens match, to obtain
Respond the digitized video of numerical value equiblibrium mass distribution between 0-255.
In step (3), the optical imaging lens and ccd detector are placed in the normal direction of fresh laser material surface
On, the color digital image that fresh laser material is formed after light source irradiates is received under the control of the computer.The CCD detection
Device and optical imaging lens acquired image are RGB image.
The image resolution of the ccd detector and optical imaging lens is 600dpi.Industry color CCD and optics at
As camera lens has dynamic and static color digital image capturing function, and minimum of the requirement on the visual field object plane that dimension is 1cm or so
Resolution size guarantees the pattern digital image resolution of capture not less than 600dpi less than 45 μm.The computer control
Software captures the color digital image of fresh laser material by the drive software of ccd detector, and output color gamut is not less than
48bit。
In step (4), the grating equation is d (sini+sinj)=k λ；Wherein, d is that (grating is normal for screen periods
Number), i is incidence angle, and j is the angle of diffraction, and λ is lambda1-wavelength, and k is diffraction progression, k=± 1,2,3 ....
In this method, also mountable software for calculation in computer, software for calculation is by obtained color image according to color knot
Grating equation is closed, the range of grating constant is calculated.
Computer control and software for calculation capture the colorful number figure of tested pattern by the drive software of ccd detector
Picture, and the RGB numerical value of image is read, changed according to rgb value corresponding to the light of visible-range 380-780nm different wave length,
It is that d (sini+sinj)=k λ calculates its grating constant range obtained under firsts and seconds diffraction by grating equation.
Computer control software captures the color digital image of tested pattern by the drive software of CCD system, and reads
The RGB numerical value of image；Computer software for calculation is right by the light institute of different wave length in obtained color image combination visible-range
The rgb value variation answered, according to color combination grating equation, is calculated the range of grating constant.Sample (does not rotate) in situ
And 45 ° of capture, processing and calculating for carrying out color image respectively are rotated horizontally, the crossover range of two calculated result is taken, as
The grating constant range of the fresh laser material.
In the above method, using the device of measurement fresh laser material grating constant, the device is mainly by setting sample platform, illumination
The composition such as light source, photoelectronic imaging camera lens, ccd detector, computer, computer control software and software for calculation；Sample platform is set to be used for
Fresh laser material sample is placed, lighting source is set to sample to be tested normal to a surface side, and optical imaging lens and CCD are visited
It surveys device and is set to sample to be tested normal to a surface direction, ccd detector is connect with computer；Rotation is arranged in described setting on sample platform
Axis and detent, the sample platform of setting can be using the receiving direction of optical imaging lens and ccd detector as 45 ° of axis horizontal rotation, meter
Computer control software and software for calculation are installed, by (not rotating) and rotating horizontally 45 ° two in situ to sample in calculation machine
Position carries out capture, processing and the calculating of color image, obtains the grating constant variation range of tested fresh laser material.
In the device, lighting source is placed on certain face in the fresh laser material plane set on sample platform for uniform irradiation
Long-pending region, optical imaging lens and ccd detector are for capturing the image that radium-shine material is formed after light source irradiates, computer
And control software is used to control the capture of image, and is handled and calculated with RGB information of the software for calculation to digital picture, obtains
The grating constant variation range of fresh laser material must be tested.
Lighting source irradiation is placed on the fresh laser material set on sample platform, ccd detector and photoelectronic imaging by the present invention
No marking, the color image formed after light source irradiates without set-off region, computer connection on camera lens acquisition fresh laser material
Photoelectronic imaging camera lens and ccd detector can be utilized for the capture of image, then (not rotated) in situ by sample and horizontal
The color image combination grating equation that 45 ° of two station acquisitions of rotation arrive calculates the grating constant range of fresh laser material.It adopts
Fresh laser material grating constant is measured with the method for the present invention and device, can quickly, conveniently obtain fresh laser material
Grating constant range；It can avoid detecting the grating constant of fresh laser material using high magnification numbe magnifying glass and using more simultaneously
Angle spectrophotometer calculates grating constant.
Below by the drawings and specific embodiments, the present invention will be further described, but is not meant to protect the present invention
Protect the limitation of range.
Detailed description of the invention
Fig. 1 is the apparatus structure schematic diagram of present invention measurement fresh laser material grating constant.
Fig. 2 is for lighting source incidence angle in 15 ° of -30 ° of ranges, and when the angle of diffraction is 0 °, the fresh laser material of acquisition is not
The corresponding relationship of color change and the grating constant being calculated at same rotation position (0 ° and 45 °).
Main appended drawing reference:
1 sets 2 fresh laser material of sample platform
3 white-light illuminating light source, 4 collimation lens
5 optical imaging lens, 6 ccd detector
7 computers
Specific embodiment
Laser paper is to be formed by holographic grating molding version (hereinafter referred to as mother matrix) by transfer, processing, is original with mother matrix
Version, by being molded, aluminizing, compound, coating, the grating fringe that will delineate on mother matrix of techniques such as cutting be transferred on paper.Mother matrix,
Moulding film, aluminizer and finished paper all have the holographic cell of close optical grating construction and screen periods (grating constant), for side
Just for the sake of, radium-shine material is referred to as in the application.
The device used in the method for the present invention is mainly by setting sample platform, lighting source, photoelectronic imaging camera lens, ccd sensor, meter
The composition such as calculation machine, computer control software and software for calculation.Sample platform is set for placing fresh laser material, lighting source is for equal
Even irradiation is placed on the region for setting certain area in the material plane of the fresh laser on sample platform, optical imaging lens and CCD detection
Device is used to control the capture of image for capturing the image that radium-shine material is formed after light source irradiates, computer and control software,
And handled and calculated with RGB information of the software for calculation to digital picture, obtain the grating constant of tested fresh laser material
Variation range.
The method of the present invention passes through fixed vegetarian noodles radium-shine material, and ccd detector and photoelectronic imaging mirror are utilized after light source irradiates
Head acquires any no marking on sample material, without the image at dirty position；By computer control software collect by
It measures and monitor the growth of standing timber the RGB image of material, is analyzed with software for calculation, the grating constant of fresh laser material is calculated.The present invention is to element
There is no limit to the start angle of measurement, there is no limit to incident light angle, there is no limit behaviour for the measurement position of face radium-shine material
Author in use, can arbitrarily select the measurement position of vegetarian noodles radium-shine material, start angle and light source incidence angle (15 °-
30°)。
(1) lighting source is selected, it is desirable that lighting source is distributed in tested pattern normal to a surface side, the light that light source issues
Line is in tested pattern along being with tested pattern surface normal direction (normal refers to the straight line perpendicular to tested pattern surface) angle
α；
(2) above-mentioned measuring device is used, placed on setting sample platform and fixes vegetarian noodles radium-shine material.Choose vegetarian noodles radium to be tested
Any on material is penetrated without obvious scratch, without set-off position as image acquisition region；
(3) ccd detector and optical imaging lens are connect with computer, colour can be carried out by computer control software
The capture of image；
(4) it according to the variation of the colouring information of the RGB image captured, can be calculated with computer software for calculation to be tested
The grating constant range of fresh laser material.
Combined with specific embodiments below, the present invention is described further:
As shown in Figure 1, for the apparatus structure schematic diagram of present invention measurement fresh laser material grating constant.This measurement vegetarian noodles
The device of radium-shine material grating constant range, main includes setting sample platform 1, white-light illuminating light source 3, collimation lens 4, optical imaging lens
First 5 and ccd detector 6, computer 7 and the control software and software for calculation being mounted on computer 7.Sample platform 1 is set for placing
2 sample of fresh laser material, white-light illuminating light source 3 is for irradiating the fresh laser material 2 for being placed on and setting on sample platform 1, illumination light
The incident light that source 3 issues is focused at the range illumination more concentrated on fresh laser material 2 by collimation lens 4, optics at
As camera lens 5 and ccd detector 6 connect light for capturing the color image after fresh laser material 2 is irradiated by light source, computer 7
Imaging lens 5 and ccd detector 6 are learned, computer control software is used to control the capture of color image, computer software for calculation root
Change according to the colouring information of the chromatic image twice captured, the grating constant model of fresh laser material to be tested is calculated
It encloses.
Lighting source 3 is set to sample to be tested normal to a surface side, and optical imaging lens 5 and ccd detector 6 are set to
Sample to be tested normal to a surface direction, ccd detector 6 are connect with computer 7；It sets and rotary shaft and detent is set on sample platform 1, set sample
Platform 1 can rotate horizontally 45 ° by axis of the receiving direction of optical imaging lens 5 and ccd detector 6, install computer in computer 7
Software and software for calculation are controlled, carries out color image by (not rotating) and rotating horizontally 45 ° of two positions in situ to sample
Capture, processing and calculating, obtain the grating constant variation range of tested fresh laser material.
Embodiment 1:
Measure the grating constant of fresh laser materials A and B, the specific steps are as follows:
(1) white light LEDs point light source is selected, incident angle is set as 30 °, and colour temperature 5000-6500k is distributed in by mapping
Sample normal to a surface side, light-emitting line are collimated through the camera lens of light source front end, are about to obtain illumination on imaging surface
300mW/cm2The uniform irradiation of left and right.
(2) a kind of fresh laser material is selected, is fixed in and sets on sample platform.It chooses on fresh laser material to be tested
Any no marking, without dirty position as image acquisition region, can avoid the interference of the dirty color effects to acquisition image.
(3) ccd detector 6 and optical imaging lens 5 are placed in 2 normal to a surface of fresh laser material (normal refer to vertical
Directly in the straight line of fresh laser material surface) on direction, computer control software is connected, is received under the control of computer software
The color image that fresh laser material 2 is formed after light source illuminates；
CCD imaging system selects the industry color area array CCD of high s/n ratio, and pixel number is 2452 × 2054, cooperates optics
Enlarging lens obtain on object plane 45 μm or so in the visual field of 1cm or so of resolution ratio, can form the colour that resolution ratio is 600dpi
Digital picture, to guarantee image quality more than the precision that micron dimension is analyzed.Adjust CCD imaging system time for exposure and
Sensitivity makes in pattern application range, is formed by digital image color numerical value and (avoids too small and mistake within the scope of 10-245
Greatly).
(4) the RGB image obtained according to step (3), in conjunction with grating equation d (sini+sinj)=k λ, wherein d is grating
Period, i are incidence angle (30 °), and j is the angle of diffraction (0 °), and λ is lambda1-wavelength (380nm-780nm), and k is diffraction progression, k=
± 1,2,3 ..., derive the grating constant range of fresh laser material.The calculating process can by computer software for calculation come
It completes.
The visible light (as shown in table 1) that different wave length can be corresponded to according to collected different colours, obtains visible light
The corresponding grating constant range of wavelength.
Collecting the picture tone of fresh laser materials A and B 0 ° of position is red, and the range of incident wavelength (λ) is 620
~780nm.When in view of 1 grade of diffraction, k=1.Since image capturing system is placed in above fresh laser material surface normal, this
When, the angle of diffraction is 0 °.When incidence angle is 30 °, it can derive that the grating of fresh laser materials A and B are normal by grating equation
Number range changes in 1.24-1.56 μ m.
The corresponding color perception of 1 different wave length of table
(5) region is taken as the center of circle using fresh laser material, is setting sample platform and sample institute in the horizontal plane by vegetarian noodles radium
It penetrates material and rotates 45 °, i.e., using the receiving direction of optical imaging lens and ccd detector as axis, the related element thereon of sample platform 1 will be set
Face radium-shine material 2 rotates horizontally 45 °, repeats the work of step (2)-step (4), fresh laser materials A and the RGB of B can be obtained
Colouring information variation.
Since image capturing system is placed in above fresh laser material surface normal, at this point, the angle of diffraction is 0 °.Work as incidence angle
When being 30 °, acquired image tone is yellow green (darker) after fresh laser materials A is rotated 45 °, incident wavelength (λ)
Range is 530~560nm.When in view of 2 grades of diffraction, k=2 can derive the light of fresh laser material by grating equation
Grid constant range changes in 1.50-1.58 μ m.Acquired image tone is indigo plant after fresh laser material B is rotated 45 °
Color (darker), the range of incident wavelength (λ) are 430~470nm.When in view of 2 grades of diffraction, k=2 passes through grating equation
Derive that the grating constant range of fresh laser material changes in 1.22-1.33 μ m.Fresh laser material is rotated 45 °
Afterwards, in diagonal, effective grating constant at this time is the diffraction overlay of the x of square grid, y both direction
By to fresh laser materials A and B in 0 ° of position and 45 ° of positions color measuring twice and calculated result, finally
The grating constant of fresh laser material can be limited to 1.50-1.56 μ m and 1.24-1.33 μ m.
Embodiment 2:
Measure fresh laser material sample 1#-4#Grating constant, using the method for embodiment 1, by the incidence of lighting source
Angle initialization is 30 °, to fresh laser material sample 1#-4#The measurement for carrying out grating constant, collects fresh laser material sample
1#-4#Color image in 0 ° of position and 45 ° of positions is as shown in table 2 the fresh laser material of four different grating constants
Colouring information variation at 0 ° of position and 45 ° of positions.Wherein color bluish violet (darker) and yellow green that 45 ° of station acquisitions arrive
(darker) show ccd detector it is collected be second-order diffraction optical signal.
Grating constant range of the fresh laser material behind 0 ° of position and 45 ° of positions is derived by grating equation calculating,
After wherein rotating 45 degree, substituting into effective grating constant that grating equation calculates is 0 ° of position grating constantTimes.Such as 2 institute of table
Show, four fresh laser materials 1#-4#Grating constant be respectively 0.85 μm, 1.0 μm, 1.15 μm and 1.5 μm.
The corresponding grating constant range (μm) of 2 visible wavelength of table
Can as seen from Table 2, it, can be according to element after light source irradiates when the incidence angle of lighting source and the angle of diffraction determine
The color that face radium-shine material is presented infers the range of its grating constant.
Embodiment 3:
The grating constant for measuring fresh laser material C, using the method for embodiment 1, respectively by the incidence angle of lighting source
Degree is set as 15 °, 20 °, 25 ° and 30 °, and the measurement of grating constant is carried out to fresh laser material sample C, acquires fresh laser material
Expect sample C in the color image of 0 ° of position and 45 ° of positions.
As shown in Fig. 2, being lighting source incidence angle in 15 ° of -30 ° of ranges, when the angle of diffraction is 0 °, element can be obtained by being calculated
The corresponding relationship of color change and grating constant at face radium-shine material different rotary position (0 ° and 45 °).In Fig. 2 shown in dotted line
When region is 0 ° of position, the image that whens 30 ° of incidence angles captures is blue, it is known that collected wave-length coverage is 430-470nm
(first-order diffraction), the grating constant of fresh laser material C known to grating equation are 0.86-0.94 μm.When by fresh laser material
45 ° of material rotation, the image that region shown in solid obtains in Fig. 2 are red, it is known that collected wave-length coverage is 620-730nm
(first-order diffraction), the grating constant of fresh laser material C known to grating equation is 0.88-1.10 μm, therefore the radium-shine material
Grating constant be 0.88-0.94 μm.
As rotation angle is changed from 0 ° to 45 °, the image scanned is by short-wave band color (purple, blue) to medium wave band
When (the orange, red) variation of color (green, yellow green), long-wave band color, the k in grating equation is 1, is shown to be level-one and spreads out
It penetrates.When 0 ° of calculating, k=1；When 45 ° of calculating, k=2.
There is no limit to the start angle of measurement, there is no limit to light to the measurement position of fresh laser material by the present invention
The irradiating angle in source is limited in 15 ° of -30 ° of ranges.Operator in use, can arbitrarily select the measurement of vegetarian noodles radium-shine material
Position, start angle.By measuring (0 ° of position and 45 ° of positions) fresh laser RGB image acquired for materials arrived twice, can push away
The grating constant range of fresh laser material is exported, the invention method is using more convenient, quick, and cost is relatively low.
Claims (10)
1. a kind of method for measuring fresh laser material grating constant, includes the following steps:
(1) it is placed on setting sample platform and fixes vegetarian noodles radium-shine material；
(2) selection illumination point light source, is set to sample to be tested normal to a surface side for lighting source, by optical imaging lens and
Ccd detector is set to sample to be tested normal to a surface direction, and ccd detector and optical imaging lens are connect with computer, leads to
Cross the capture that computer control software carries out color image；
(3) using the receiving direction of optical imaging lens and ccd detector as axis, the related fresh laser material thereon of sample platform will be set
45 ° are rotated horizontally, carries out the capture of color image again；
(4) according to the variation of the colouring information of the chromatic image twice captured, vegetarian noodles to be tested is calculated in conjunction with grating equation
The grating constant range of radium-shine material.
2. the method for measurement fresh laser material grating constant according to claim 1, it is characterised in that: the illumination
Light source is white light point light source, and the colour temperature of the lighting source is 5000-6500k.
3. the method for measurement fresh laser material grating constant according to claim 1, it is characterised in that: the illumination
The incident angle of light source be lighting source issue light and sample to be tested surface normal direction angle, incident angle be 15 °-
30°。
4. the method for measurement fresh laser material grating constant according to claim 3, it is characterised in that: the illumination
The light that light source issues is focused on fresh laser material by collimation lens.
5. the method for measurement fresh laser material grating constant according to claim 1, it is characterised in that: selection vegetarian noodles radium
Penetrate on material it is any without obvious scratch, the flattened region without set-off as image acquisition region.
6. the method for measurement fresh laser material grating constant according to claim 1, it is characterised in that: the CCD
Detector and imaging lens acquired image are RGB image.
7. the method for measurement fresh laser material grating constant according to claim 1, it is characterised in that: the CCD
The image resolution of detector and imaging lens is 600dpi or more；The computer control software passes through the drive of CCD system
The color digital image of dynamic software capture fresh laser material, output color gamut are not less than 48bit.
8. the method for measurement fresh laser material grating constant according to claim 1, it is characterised in that: the grating
Equation is d (sini+sinj)=k λ；Wherein, d is screen periods, and i is incidence angle, and j is the angle of diffraction, and λ is lambda1-wavelength, and k is
Diffraction progression, k=± 1,2,3 ....
9. the method for measurement fresh laser material grating constant according to claim 1, it is characterised in that: pass through computer
According to color combination grating equation, the range of grating constant is calculated in obtained color image by software for calculation.
10. a kind of device for measuring fresh laser material grating constant, it is characterised in that: the device is mainly by setting sample platform, illumination
Light source, photoelectronic imaging camera lens, ccd detector, computer, computer control software and software for calculation composition；Sample platform is set for putting
Fresh laser material sample is set, lighting source is set to sample to be tested normal to a surface side, optical imaging lens and CCD detection
Device is set to sample to be tested normal to a surface direction, and ccd detector is connect with computer；Rotary shaft is arranged on sample platform in described setting
And detent, the sample platform of setting can be using the receiving direction of optical imaging lens and ccd detector as 45 ° of axis horizontal rotation, calculating
Computer control software and software for calculation are installed in machine, by sample in situ and rotate horizontally 45 ° of two positions carry out it is color
Capture, processing and the calculating of chromatic graph picture obtain the grating constant variation range of tested fresh laser material.
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| CN201910185872.2A CN109827657B (en) | 2019-03-12 | 2019-03-12 | Method and device for measuring grating constant of plain laser material |
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|---|---|---|---|
| CN201910185872.2A CN109827657B (en) | 2019-03-12 | 2019-03-12 | Method and device for measuring grating constant of plain laser material |
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| CN109827657B CN109827657B (en) | 2024-03-01 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111721716A (en) * | 2020-06-15 | 2020-09-29 | 深圳劲嘉集团股份有限公司 | Method for measuring grating constant of matte cylindrical holographic printing material |
| CN112763064A (en) * | 2020-12-23 | 2021-05-07 | 浙江溯源光科技有限公司 | Integrated spectrometer based on MEMS |
| CN114942245A (en) * | 2022-07-04 | 2022-08-26 | 凌云光技术股份有限公司 | Laser packaging material detection device, system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114942245B (en) * | 2022-07-04 | 2024-04-19 | 凌云光技术股份有限公司 | Laser packaging material detection device, system and method |
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