CN104330240B - A kind of method of spectrophotometer measurement light beam laser paper grating parameter - Google Patents
A kind of method of spectrophotometer measurement light beam laser paper grating parameter Download PDFInfo
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Abstract
A kind of method that the present invention relates to spectrophotometer measurement light beam laser paper grating parameter.First according to grating equation, the grating constant under different diffraction angle and diffraction progression and Wavelength distribution graph of a relation are drawn；Multi-angle formula spectrophotometer is used to gather light beam laser paper at the spectral energy curve distribution figure along light beam direction and the spectroscopic data being perpendicular to different measuring region, light beam direction, under the different detection angle of drafting；In conjunction with the grating constant under different diffraction angle and diffraction progression and Wavelength distribution relation, analyze the Changing Pattern of the spectroscopic data recorded, calculate the grating constant of grating fringe；Fixing multi-angle spectrophotometer unthreaded hole and the relative position of laser paper, by light beam laser paper Plane Rotation 90 °, measure the spectral information of same position, the delineation direction of derivation light beam laser paper grating fringe.The present invention to some extent solves puzzlement scientific circles and industrial quarters is difficult to accurately measure the difficult problem of laser paper, has feature efficiently convenient and simple for operation.
Description
Technical field
A kind of method that the present invention relates to spectrophotometer measurement light beam laser paper grating parameter, by using
The spectral information of diverse location on X-Rite MA68 II multi-angle spectrophotometer measurement light beam laser paper, in conjunction with not
With the variation relation of diffraction dominant wavelength and angle of diffraction of the grating fringe correspondence different diffraction progression of grating constant, carry
Go out a kind of method that can use X-Rite MA68 II multi-angle spectrophotometer measurement light beam laser paper grating parameter.
Background technology
Laser film and laser transfer paper have special bright rainbow effect, have certain anti-counterfeiting performance simultaneously, are deeply subject to
Liking of Packaging and Printing Enterprises.But Packaging and Printing Enterprises is typically to the processing technique of laser film and laser transfer paper also
Do not know about, radium-shine paper substrate carry out picture and text printing, often occur typography parameter consistent but outside product colour
See inconsistent problem.This causes mainly due to the color distortion of the basic body of laser paper, when light is irradiated to radium-shine
Time on paper substrate, in addition to producing the diffuse-reflectance of light, there is also the direct reflection of light, diffraction and interference.Affect radium-shine
The main cause of paper difference colouring effect be the grating parameter of the internal grating fringe of laser film or laser transfer paper not
With, the delineation direction of its grating constant specifically including that grating fringe and grating fringe and width of nick.Grating is normal
The delineation direction of number and grating fringe mainly affects radium-shine paper substrate and presents the dominant wavelength of color in different viewing angles, and
The width of nick of grating fringe mainly affects the light and shade of spectral energy, i.e. color.
Summary of the invention
A kind of method that it is an object of the invention to propose spectrophotometer measurement light base for post laser paper grating parameter,
Gather the spectral information of diverse location on light base for post laser paper by spectrophotometer, reach to measure light base for post laser paper
The purpose of grating parameter.Solve light base for post laser paper microtexture measurement and need asking by high multiple magnifier
Topic, directly can complete the measurement of grating micro-parameter with spectrophotometer, and it is light beam that the method is suitable for all outward appearances
The micro-parameter of laser paper is measured and quality of colour is evaluated and tested.
For achieving the above object, the present invention takes techniques below scheme:
A kind of method of spectrophotometer measurement light beam laser paper grating parameter, comprises the steps:
(1) according to grating equation, obtaining corresponding to different diffraction angle, when angle of incidence is fixed value, difference is spread out
Penetrate the corresponding relation of the grating constant under progression and wavelength, and it is normal to draw the grating under different diffraction angle and diffraction progression
Number and Wavelength distribution graph of a relation；
(2) on the basis of the adjacent two rainbow bands of light beam laser paper, by light beam laser paper along light beam direction and hang down
Directly being divided into different measured zone in light beam direction, with x-y labelling, wherein x represents that, along light beam direction, y represents vertical
Straight in light beam direction；
(3) multi-angle formula spectrophotometer is used to gather on light beam laser paper along rainbow band direction (x direction) and vertical
Directly in the spectroscopic data of rainbow band direction (y direction) diverse location, draw different detection angle (receive direction with
Specular light angle) under spectral energy curve distribution figure；
(4) analyze on light beam laser paper along light beam direction be perpendicular to the light beam direction different search angle of diverse location
The spectroscopic data regularity of distribution collected under degree；
(5) grating constant and Wavelength distribution under integrating step (1) draws different diffraction angle and diffraction progression are closed
System, the Changing Pattern of the spectroscopic data that analytical procedure (3) records, calculate the grating constant of grating fringe；
(6) fixing multi-angle spectrophotometer unthreaded hole and the relative position of laser paper, revolve light beam laser paper plane
Turn 90 °, measure the spectral information of same position, repeat step (3)-(5), derivation light beam laser paper grating fringe
Delineation direction.
Said method can further apply check individual light beam laser paper surface grating striped delineation uniformity and
The concordance of light beam laser paper grating fringe delineation in batches.
In step (1), described grating equation is: d (sini+sinj)=k λ, and in formula, d is grating constant, i
Being angle of incidence and the angle of diffraction respectively with j, k is diffraction progression, and λ is wavelength；Wavelength X is in visible-range
(380～780nm) value, diffraction progression k is 1-4 level, and grating constant is value between 0.5～2, at angle of incidence
(such as angle of incidence i=45 °) in the case of Yi Ding, obtain corresponding to different diffraction angle, when angle of incidence is i, no
With the grating constant under diffraction progression k and the corresponding relation of wavelength X, and draw under different diffraction angle and diffraction progression
Grating constant and Wavelength distribution graph of a relation.In the case of angle of incidence is certain, can detect according at different diffraction angle
The spectral energy peak Distribution arrived, extrapolates the grating constant of grating fringe.
In step (3), use X-Rite MA68 II spectrophotometer, light base for post laser paper is carried out spectral information
Gathering, on the premise of the plane included angle ensureing spectrophotometer and laser paper is constant, measure spectrum scope is
400～700nm, wavelength interval is that 10nm, the X-Rite spectrophotometric smooth source lighting of MA68 II multi-angle enters
Firing angle is 45 °, detection angle (receive direction with specular light angle) be respectively 15 °, 25 °, 45 °, 75 ° and
110 °, draw the spectral power distribution figure of multi-angle.
In step (3), when gathering data, fix laser paper difference sampled point and spectrophotometric position successively
(keeping ruled grating striped, lighting source and the determination of collection light hole site), keep spectrophotometric measurement simultaneously
Amount unthreaded hole plane is constant with measurement paper substrate plane included angle.
In step (4), the spectral distribution of light base for post laser paper, along light beam direction and be perpendicular to light beam direction light
There is bigger difference in Spectral structure rule, samples along light beam direction, and spectral distribution rule is roughly the same；And it is vertical
In light beam direction along with the change of sampling location, spectral distribution rule shows bigger difference.
In step (5), according to spectrophotometer at the different diffraction progression that different photodetection angles record
400～700nm curve of spectrum peak energy distributions, are extrapolated grating constant by grating equation d (sini+sinj)=k λ
d。
In step (7), according to spectrum peak energy variation before and after laser paper Plane Rotation, thus it is speculated that light beam laser paper
The grating ruling striped relative direction of diverse location.Relatively along rainbow band direction not homology before and after laser paper half-twist
The spectral power distribution rule of row (such as :-1 series: A-1, B-1, C-1, D-1, E-1), infers its grating
The direction of striped.
In step (7), use the different sampling locations of individual light base for post laser paper of spectrophotometer measurement, fixing
The paper substrate plane of laser paper is constant with the plane included angle of spectrophotometric unthreaded hole plane.Can be in terms of following two
Judge uniformity and the concordance of batch laser paper primary surface grating ruling that individual laser paper surface grating delineates:
1) the spectral energy peak Distribution of different detection angle is collected according to X-Rite MA68 II spectrophotometer,
Calculate the grating constant of laser paper primary surface grating fringe；
2) spectrum peak energy comparison before and after laser paper base plane rotates, thus it is speculated that light base for post laser paper diverse location
Grating ruling striped relative direction.
The present invention uses the method for spectrophotometer measurement light base for post laser paper grating parameter, is drawn by grating equation
Grating constant under different diffraction angle and diffraction progression and Wavelength distribution graph of a relation；Along light beam direction (x direction)
Divide different measured zone with being perpendicular to light beam direction (y direction), measure with X-Rite MA68 II spectrophotometric
The spectroscopic data of amount light base for post laser paper；The direction is at fixing light beam rainbow laser paper substrate sampling location and spectrophotometric
In the case of counting relative position, can be used for measuring the grating parameter of radium-shine paper substrate, detect radium-shine paper substrate uniformity and
The concordance of different batches laser paper grating ruling, solving measurement laser paper microstructure to a certain extent needs to borrow
Help the difficulty of high power number microscopic magnifying apparatus, there is quick, feature that error is little convenient and simple for operation.
Below by the drawings and specific embodiments, the present invention will be further described, but is not meant to the present invention
The restriction of protection domain.
Accompanying drawing explanation
Fig. 1 is the appearance figure of light beam laser paper.
Fig. 2 is the different measuring position view of light beam laser paper.
Fig. 3 is the microstructure schematic diagram (different measuring position) of light beam laser paper.
Fig. 4-1 to Fig. 4-4 is grating constant corresponding under different diffraction angle and diffraction progression and Wavelength distribution figure, wherein,
Fig. 4-1: first-order diffraction；Fig. 4-2: second-order diffraction；Fig. 4-3: three order diffraction；Fig. 4-4: four order diffraction.
Fig. 5 is the light path schematic diagram of X-Rite MA68 II light angle and photodetection angle.
Fig. 6-1 to Fig. 6-5 is perpendicular to the spectral distribution graph of A-position, rainbow band direction difference detection angle, wherein,
Fig. 6-1: detection angle is 15 °；Fig. 6-2: detection angle is 25 °；Fig. 6-3: detection angle is 45 °；Fig. 6-4:
Detection angle is 75 °: Fig. 6-5: detection angle is 110 °.
Fig. 7-1 to Fig. 7-4 is along the four width spectral distribution graphs that rainbow band orientation detection angle is 110 °, wherein,
Fig. 7-1:-3(A-3, B-3, C-3, D-3, E-3) position；Fig. 7-2:-4 position；Fig. 7-3:-7 position；
Fig. 7-4:-8 position.
Fig. 8-1 to Fig. 8-4 is along the four width light that rainbow band orientation detection angle is 110 ° by radium-shine paper substrate half-twist
Spectral structure figure, wherein, Fig. 8-1:-3(A-3, B-3, C-3, D-3, E-3) position；Fig. 8-2:-4 position；
Fig. 8-3:-7 position；Fig. 8-4 is-8 positions.
Detailed description of the invention
The present invention utilizes spectrophotometer light base for post laser paper to be carried out the measurement of grating micro-parameter, at angle of incidence one
In the case of Ding, draw the grating constant under different diffraction angle and diffraction progression according to grating equation and Wavelength distribution is closed
System's figure；With X-Rite MA68 II spectrophotometer, the lighting condition of light source is 45 °, receive direction be respectively with
Specular light angle is 15 °, 25 °, 45 °, 75 ° and 110 ° of five angles, is ensureing that spectrophotometer is with radium-shine
On the premise of the plane included angle of paper is constant, measure along rainbow light beam direction and the spectrum being perpendicular to rainbow light beam direction
Energy information.Identical along the spectral distribution rule in rainbow light beam direction, it is perpendicular to light beam direction along with sampling location
Change, spectral distribution rule has bigger difference.
As it is shown in figure 1, be the outward appearance of light beam laser paper, x represents along light beam direction, and y represents and is perpendicular to light beam direction,
L is the rainbow band cycle.The method using spectrophotometer measurement light base for post laser paper grating parameter, reaches radium-shine
Paper substrate grating fringe delineation uniformity and conforming detection, specifically comprise the following steps that
(1) according to grating equation d (sini+sinj)=k λ, the d in formula is grating constant, i and j enters respectively
Firing angle and the angle of diffraction (angle of incidence in X-Rite MA68 II i=45 °), k is diffraction progression, and λ is wavelength.Change
Grating constant (value between 0.5～2), wavelength X is (380-780nm) value in visible-range, spreads out
Penetrate stage number selection 1-4 level, according to grating equation corresponding to the different angles of diffraction and diffraction progression, grating is normal
Number and the variation relations of wavelength, if Fig. 4-1 is to shown in Fig. 4-4, respectively diffraction progression be 1～4, different diffraction angle
The grating constant of lower correspondence and Wavelength distribution figure.
(2) on the basis of two rainbow bands that laser paper is adjacent, by light beam laser paper along light beam direction and vertical
Being divided into different measured zone in light beam direction, number with x-y, wherein x represents that, along light beam direction, y represents
It is perpendicular to light beam direction, as shown in Figure 2.Wherein x direction is numbered with A-E respectively, and y direction is compiled with 1-11 respectively
Number.
(3) use X-Rite MA68 II multi-angle formula spectrophotometer that light base for post laser paper is carried out color measuring,
Spectral region 400-700nm, wavelength interval is 10nm.Ensureing the plane included angle of spectrophotometer and laser paper not
On the premise of change, the lighting condition of light source is 45 °, and receiving direction and being respectively with specular light angle is 15 °, 25 °,
45 °, 75 ° and 110 ° of five angles, the index path of MA68 II is as shown in Figure 5.
The plane included angle keeping spectrophotometer measurement unthreaded hole plane and laser paper plane paper substrate is constant, i.e. ensure for
The grating ruling striped of the different measuring position of light beam laser paper shown in Fig. 3, lighting source and collection light hole site
Determine, gather on light beam laser paper along rainbow band direction and the spectroscopic data being perpendicular to rainbow band direction sampled point, paint
The spectral power distribution figure that II 5 angle detections of X-Rite MA68 processed arrive.
(4) Fig. 6-1 to Fig. 6-5 visible vertical is in rainbow band direction A-series, Fig. 6-1(detection angle 15 °),
Fig. 6-2(detection angle 25 °), Fig. 6-3(detection angle 45 °), Fig. 6-4(detection angle 75 °) and Fig. 6-5
The spectral distribution graph of (detection angle 110 °).15 ° of corresponding angle of diffraction of detection angle are-30 °, spread out in Fig. 6-1
Ejected wave length is less than 300nm；When detection angle is 25 °, corresponding angle of diffraction is-20 °, diffraction wavelength in Fig. 6-2
At about 420nm；The angle of diffraction that detection angle is corresponding when being 45 ° is 0 °, and in Fig. 6-3, diffraction wavelength is being less than
400nm wave band and two wave bands of 680nm；When detection angle is 75 °, corresponding angle of diffraction is 30 °, Fig. 6-4
Middle diffraction wavelength is at two wave bands of 410nm and 700nm；Detection angle be 110 ° of corresponding angle of diffraction be 65 °,
Diffraction wavelength in Fig. 6-5 is 410nm and 550nm.
Can be released this radium-shine in conjunction with the grating constant under different diffraction angle and diffraction progression and Wavelength distribution graph of a relation
Paper substrate grating constant is 1 μm.As, 65 shown in Fig. 6-5 ° angle of diffraction spectral power distribution figure measured can
Knowing, peak wavelength 550nm therein is the dominant wavelength that in Fig. 4-3, three order diffractions are corresponding, and peak wavelength 410nm is
The dominant wavelength that in Fig. 4-4, four order diffractions are corresponding, complex chart 4-3, Fig. 4-4 understands the grating constant of this light beam laser paper
1μm.In the spectral power distribution figure that in like manner can be collected by other detection angle (-20 °, 0 °, 30 °) corresponding
Peak wavelength and the grating constant under different diffraction progression in Fig. 4-1 to Fig. 4-4 and Wavelength distribution relation, extrapolate
The light beam laser paper grating constant of this measurement is 1 μm.
(6) Fig. 7-1 to Fig. 7-4 visible collect when detection angle is 110 ° along 4 of rainbow band direction
Spectral distribution graph, is respectively-3 ,-4 ,-7 ,-8 series, such as :-3 series refer to A-3, B-3, C-3, D-3, E-3
Five positions.The edge that Fig. 8-1 to Fig. 8-4 is to be collected when being 110 ° by laser paper base plane half-twist detection angle
4 spectral distribution graphs in rainbow band direction, be respectively-3 ,-4 ,-7 ,-8 series.
(7) Fig. 7-1 to Fig. 8-4 and grating equation d (sini+sinj)=k λ and Fig. 4-1 to Fig. 4-4 institute are combined
Show when angle of incidence is fixed value, the grating constant under different diffraction angle and diffraction progression and Wavelength distribution relation
Figure, analyzes the spectroscopic data Changing Pattern that II 5 angle photodetection mouths of X-Rite MA68 record.
A)-7 shown in Fig. 7-3 and 7-4 are the lowest with the spectral energy that-8 series collect, and this is due to X-Rite
The feature of MA68 II interior lights line structure, due to optical grating diffraction effect, enters detector almost without light energy.
And in same position, by-7 spectrum collected with-8 series shown in radium-shine paper substrate half-twist Fig. 8-3 and 8-4
Energy can enter detector, and energy occurs that peak change meets spectral diffraction principle simultaneously.In like manner Fig. 7-1 and figure
The spectrum peak energy that shown in 7-2-3 and-4 series collect is the highest, after radium-shine paper substrate half-twist, and Fig. 8-1
The lowest with the spectrum peak energy that-4 series collect with shown in 8-2-3, enter detector almost without light.
B) Fig. 7-1 to Fig. 7-4 and Fig. 8-1 to Fig. 8-4 carries out corresponding comparison, can speculate-3 with-4 serial positions
Grating fringe delineation direction is vertical with-7 and-8 serial position grating fringe delineation directions.
(8) uniformity that individual laser paper surface grating is delineated, or the one of batch laser paper grating ruling are checked
Cause property, according to step (7) detection method, detects the grating constant of individual radium-shine paper substrate grating ruling striped, light
Grizzly bar stricture of vagina relatively delineate direction.
The method of the present invention can be used for detecting the uniformity on individual laser paper surface or batch laser paper grating ruling
Concordance.Owing to individual laser paper is in the direction delineating width of fringe and grating fringe delineation of various location, make
Laser paper surface occurs in that gorgeous bright rainbow effect；Simultaneously because light beam laser paper primary surface grating ruling has week
Phase property, along rainbow band direction, the direction of grating fringe delineation is consistent, and is perpendicular to rainbow band direction diverse location
Grating ruling direction (counterclockwise) clockwise rotates a certain angle, so when detecting it is noted that should be noted
Standard specimen and the sampling location of test specimens and instrument and the putting position of paper substrate.
The present invention is by along light beam direction be perpendicular to light beam direction light beam rainbow laser paper is divided into different measuring district
Territory, the spectral energy information of same position before and after fixing multi-angle spectrophotometer, relatively radium-shine paper substrate half-twist
Change, draw the grating constant under different diffraction angle and diffraction progression and Wavelength distribution relation in conjunction with grating equation
Figure, may infer that this radium-shine paper substrate grating constant and incline direction of grating fringe.By the present invention in that with polygonal
Degree spectrophotometer gathers the spectral information of diverse location on laser paper, solves light base for post laser paper microstructure and surveys
Amount needs the problem by high multiple magnifier, directly completes radium-shine paper substrate grating parameter with multi-angle spectrophotometer
Measurement and reckoning；To some extent solve puzzlement scientific circles and industrial quarters is difficult to accurately measure the difficulty of laser paper
Topic, has feature efficiently convenient and simple for operation.
Claims (5)
1., by a method for spectrophotometer measurement light beam laser paper grating parameter, comprise the steps:
(1) according to grating equation, obtaining corresponding to different diffraction angle, when angle of incidence is fixed value, difference is spread out
Penetrate the corresponding relation of the grating constant under progression and wavelength, and it is normal to draw the grating under different diffraction angle and diffraction progression
Number and Wavelength distribution graph of a relation；
(2) on the basis of the adjacent two rainbow bands of light beam laser paper, by light beam laser paper along light beam direction and hang down
Directly being divided into different measured zone in light beam direction, with x-y labelling, wherein x represents that, along light beam direction, y represents vertical
Straight in light beam direction；
(3) multi-angle formula spectrophotometer is used to gather on light beam laser paper along rainbow band direction and be perpendicular to rainbow
With the spectroscopic data of direction diverse location, draw the spectral power distribution figure under different detection angle；
(4) analyze on light beam laser paper along light beam direction be perpendicular to the light beam direction different search angle of diverse location
The spectroscopic data regularity of distribution collected under degree；
(5) grating constant and Wavelength distribution under integrating step (1) draws different diffraction angle and diffraction progression are closed
System's figure, the Changing Pattern of the spectroscopic data that analytical procedure (3) records, calculate the grating constant of grating fringe；
(6) fixing multi-angle spectrophotometer unthreaded hole and the relative position of laser paper, revolve light beam laser paper plane
Turn 90 °, measure the spectral information of same position, repeat step (3)-(5), derivation light beam laser paper grating fringe
Delineation direction.
2. as claimed in claim 1 with the method for spectrophotometer measurement light beam laser paper grating parameter, its spy
Levy and be: described grating equation is d (sin i+sin j)=k λ, and in formula, d is grating constant, i and j is respectively
Angle of incidence and the angle of diffraction, k is diffraction progression, and λ is wavelength；Wavelength X is value in visible-range, diffraction progression
K is 1-4 level, and grating constant is value between 0.5～2, when angle of incidence is 45 °, obtains corresponding to different diffraction
Angle, the grating constant under different diffraction progression k and the corresponding relation of wavelength X, and draw different diffraction angle and spread out
Penetrate the grating constant under progression and Wavelength distribution graph of a relation.
3. as claimed in claim 1 with the method for spectrophotometer measurement light beam laser paper grating parameter, its spy
Levy and be: use X-Rite MA68 II spectrophotometer, light base for post laser paper is carried out spectral information collection, survey
Amount spectral region is 400～700nm, and wavelength interval is 10nm, X-Rite MA68 II multi-angle spectrophotometer
Light source illumination incident angle be 45 °, detection angle is respectively 15 °, 25 °, 45 °, 75 ° and 110 °, draws multi-angle
Spectral power distribution figure.
4. as claimed in claim 3 with the method for spectrophotometer measurement light beam laser paper grating parameter, its spy
Levy and be: when gathering data, fix laser paper difference sampled point and spectrophotometric position successively, keep simultaneously
Spectrophotometer measurement unthreaded hole plane is constant with measurement paper substrate plane included angle.
5. as according to any one of claims 1-4 with spectrophotometer measurement light beam laser paper grating parameter
Method, is checking uniformity and the batch light beam laser paper gratings strips of the delineation of individual light beam laser paper surface grating striped
Application in the concordance of stricture of vagina delineation.
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| CN105841818B (en) * | 2016-06-07 | 2018-01-26 | 北京印刷学院 | A kind of color measuring device and method of light beam laser paper and printed matter |
| CN106052876B (en) * | 2016-07-19 | 2017-09-15 | 北京印刷学院 | A kind of chromatism measurement method of light beam laser paper and its printed matter |
| CN107966213B (en) * | 2016-10-20 | 2020-08-21 | 尚文涛 | Measuring device, measuring method and calibration method for diffraction grating period |
| CN109827657B (en) * | 2019-03-12 | 2024-03-01 | 深圳劲嘉集团股份有限公司 | Method and device for measuring grating constant of plain laser material |
| CN110806389B (en) * | 2019-11-20 | 2022-05-27 | 河南牧业经济学院 | Device and method for detecting color quality of columnar laser paper |
| CN111721716B (en) * | 2020-06-15 | 2023-03-17 | 深圳劲嘉集团股份有限公司 | Method for measuring grating constant of matte cylindrical holographic printing material |
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