CN110806389A - Device and method for detecting color quality of columnar laser paper - Google Patents
Device and method for detecting color quality of columnar laser paper Download PDFInfo
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- CN110806389A CN110806389A CN201911137886.3A CN201911137886A CN110806389A CN 110806389 A CN110806389 A CN 110806389A CN 201911137886 A CN201911137886 A CN 201911137886A CN 110806389 A CN110806389 A CN 110806389A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/065—Integrating spheres
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Abstract
The invention discloses a device and a method for detecting color quality of columnar laser paper, wherein the detection device comprises a sample carrying platform, a first rod-shaped light source and a second rod-shaped light source; the detection device can effectively determine the position of a dark light column of the laser paper and can effectively detect the color quality of the columnar laser paper; the detection method comprises the following steps: step (1), placing laser paper to be detected; step (2), determining the position of a dark light column of the laser paper; and (3) measuring, wherein the quality control detection is carried out by detecting the color data on the dark light column by the detection method, so that the influence of the rainbow stripe effect on the surface of the columnar laser paper on the color quality detection can be effectively reduced, and the stable detection of the color quality of the columnar laser paper is realized.
Description
Technical Field
The invention belongs to the technical field of laser paper measurement, and particularly relates to a device and a method for detecting color quality of columnar laser paper.
Background
The columnar laser paper is popular with consumers due to the unique color effect, and has wide application in the field of packaging of high-end commodities such as cigarettes, wine, cosmetics and the like. Because the surface of the cylindrical laser paper has the grating, the grating can diffract under the illumination condition, the rainbow holographic effect on the surface of the grating is changed in a cylindrical period, the periodic position is difficult to fix, and a stable color value cannot be acquired only by adopting the integrating sphere spectrophotometer, so that effective color quality monitoring cannot be carried out.
Therefore, the uncertainty of the surface grating of the cylindrical laser paper makes the detection of the whole surface of the laser paper very difficult.
Disclosure of Invention
The invention aims to provide a color quality detection device for columnar laser paper, which comprises a sample carrying table, wherein a first rod-shaped light source and a second rod-shaped light source which are parallel to each other are arranged above the sample carrying table; the first rod-shaped light source and the second rod-shaped light source are horizontally arranged and are correspondingly connected with a first shell and a second shell along the respective length directions; carry appearance platform one side and still be equipped with supporting mechanism, first casing and second casing all are connected to supporting mechanism.
As a further description of the above technical solution:
the longitudinal sections of the first shell and the second shell are of inverted L-shaped structures, and the first shell and the second shell are symmetrically arranged and are provided with heat dissipation ports.
As a further description of the above technical solution:
the supporting mechanism comprises a transverse supporting rod and a longitudinal supporting rod vertically arranged at the bottom of the transverse supporting rod, and one end parts of the first shell and the second shell are connected to the transverse supporting rod.
As a further description of the above technical solution:
the distance between the first rod-shaped light source and the second rod-shaped light source is adjustable.
As a further description of the above technical solution:
the horizontal support rod is embedded with a sliding groove, a sliding block extends downwards from the bottom of the second shell, which is contacted with the horizontal support rod, and the second shell can be far away from or close to the first shell relatively through the matching of the sliding block and the sliding groove.
As a further description of the above technical solution:
and the sample carrying table is also provided with a calibration mechanism.
The detection device can effectively determine the position of the laser paper dark light column, and can effectively detect the color quality of the columnar laser paper by matching with integrating sphere type spectrophotometers equipped by most laser paper production and printing enterprises, thereby reducing the production waste and having important application value.
The invention also aims to provide a detection method of the device for detecting the color quality of the columnar laser paper, which comprises the following steps:
placing laser paper to be detected on a sample carrying table, wherein the light beam direction of the laser paper is perpendicular to a first rod-shaped light source or a second rod-shaped light source;
step (2), turning on a first rod-shaped light source and a second rod-shaped light source, irradiating laser paper to be detected to enable the surface of the laser paper to form a diffraction pattern formed by a plurality of diamonds, selecting one of the diamonds, marking two vertexes of the diamond in the direction of a light beam, and connecting the two vertexes to determine a straight line to be detected;
and (3) detecting any position point on the straight line to be measured by using color measuring equipment, and recording color data.
The detection method provided by the invention discards the mode of performing color measurement on the whole paper surface in the prior art, positions the dark light column of the columnar laser paper first, and performs quality control detection by detecting the color data on the dark light column, so that the influence of rainbow stripe effect on the surface of the columnar laser paper on color quality detection can be effectively reduced, the influence of the grating structure of the columnar laser paper on measurement is reduced to the minimum, and the stable detection of the color quality of the columnar laser paper is realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic perspective view of a detecting unit in example 1;
FIG. 2 is a schematic perspective view of a detecting unit according to embodiment 2;
FIG. 3 is an enlarged partial schematic view of FIG. 2;
FIG. 4 is a cylindrical laser paper (with color information removed) to be inspected in example 3;
FIG. 5 is a schematic view of the diffraction pattern formed on the surface of the cylindrical laser paper to be detected in example 3 (color information is removed);
FIG. 6 is a schematic view of the microscopic distribution of cylindrical laser paper gratings in example 3 (not all gratings are shown for improved clarity);
labeled as: 1. a sample carrying table; 11. a calibration mechanism; 2. a rod-shaped light source; 21. a first rod-like light source; 22. a second rod-shaped light source; 3. a housing; 31. a first housing; 32. a second housing; 321. a slider; 33. a heat dissipation port; 4. a support mechanism; 41. a transverse support bar; 411. a chute; 42. a longitudinal support bar; 43. a lifting base.
Detailed Description
The structural features of the present invention will now be described in detail with reference to the accompanying drawings.
Example 1
Referring to fig. 1, the present embodiment provides a color quality detection apparatus for columnar laser paper, including a sample carrier 1, a pair of rod-shaped light sources 2 parallel to each other is disposed above the sample carrier 1, a housing 3 is connected to the rod-shaped light sources 2, in the present embodiment, preferably, a longitudinal section of the housing 3 is an inverted L-shaped structure, and the housing 3 is disposed along a length direction of the rod-shaped light sources 2. The sample loading platform 1 is also provided with a supporting mechanism 4 on one side, and one end part of the housing 3 is connected to the supporting mechanism 4. In this embodiment, the sample stage 1 preferably has a rectangular structure, and both the two rod-like light sources 2 are parallel to the long side or the wide side of the sample stage 1.
The detection device of this embodiment can effectively confirm the position of laser paper dark light post, cooperates the integral sphere formula spectrophotometer that most laser paper production and printing enterprises have been equipped with, can effectively detect the color quality of column laser paper, reduces the production waste, has important using value. Specifically, the sample loading platform 1 is used for placing columnar laser paper to be detected, rainbow light columns on the surface of the columnar laser paper are perpendicular to the rod-shaped light source 2 during detection, and diffraction patterns are formed on the surface of the columnar laser paper under the irradiation of the rod-shaped light source 2.
Example 2
Referring to fig. 2, based on the embodiment 1, the rod-shaped light sources 2 are specifically a first rod-shaped light source 21 and a second rod-shaped light source 22, and the distance between the first rod-shaped light source 21 and the second rod-shaped light source 22 is adjustable, in this embodiment, it is preferable that the first rod-shaped light source 21 is fixedly arranged and the second rod-shaped light source 22 is movably arranged, so that the distance between the rod-shaped light sources 2 can be adjusted by adjusting the horizontal position of the second rod-shaped light source 22 during use.
Referring to fig. 2, the housing 3 includes a first shell 31 and a second shell 32 corresponding to the first rod-shaped light source 21 and the second rod-shaped light source 22, respectively, and the first shell 31 and the second shell 32 are both opened with a heat dissipation opening 33;
referring to fig. 3, the structure of the supporting mechanism 4 is specifically: the first rod-shaped light source 22 comprises a transverse supporting rod 41 and a longitudinal supporting rod 42 vertically arranged at the bottom of the transverse supporting rod, one end parts of the first shell 31 and the second shell 32 are connected to the transverse supporting rod 41, and further, the movable structure of the second rod-shaped light source 22 is specifically: the transverse supporting rod 41 is embedded with a sliding groove 411, the bottom of the second shell 32 contacting with the transverse supporting rod 41 extends downwards to form a sliding block 321, the sliding block 321 is adapted to the sliding groove 411, and the second shell 32 can horizontally move away from or close to the first shell 31 through the matching of the sliding block 321 and the sliding groove 411, so that the relative distance between the first rod-shaped light source 21 and the second rod-shaped light source 22 can be adjusted. Of course, the present invention may also be configured such that the first rod light source 21 and the second rod light source 22 are both movable.
Referring to fig. 2, the sample stage 1 is further provided with a calibration mechanism 11 for determining whether the laser paper to be detected is placed in place, so that the light beam direction of the laser paper is perpendicular to the rod-shaped light source 2, and in this embodiment, the calibration mechanism 11 is preferably a plurality of cross marks. Further, the supporting mechanism 4 further comprises a lifting base 43, the longitudinal supporting rod 42 is connected to the lifting base 43, and the lifting base 43 is used for adjusting the horizontal height of the transverse supporting rod 41, so that the horizontal height of the rod-shaped light source 2 is indirectly adjustable.
Example 3
On the basis of embodiment 1 or embodiment 2, the present embodiment provides a detection method for a color quality detection apparatus of cylindrical laser paper, including the following steps:
step (1) placing laser paper to be detected
Observing the light beam direction of the laser paper to be detected, referring to fig. 4, placing the laser paper to be detected on a sample carrying platform 1, wherein the light beam direction is vertical to the directions of the two rod-shaped light sources 2;
step (2) determining the position of a dark light column of the laser paper
Switching on a power supply of the rod-shaped light source 2, irradiating the laser paper to be detected by the rod-shaped light source 2, observing from top to bottom, and seeing that a diffraction pattern formed on the surface of the columnar laser paper is as shown in figure 5, wherein under the irradiation of the two rod-shaped light sources 2, the diffraction pattern is composed of a plurality of connected rhombuses, two vertexes of the rhombuses in the light column direction of the laser paper are marked, and a straight line determined by the two vertexes is the position of a dark light column of the laser paper;
step (3), measurement
The color data obtained by measuring any point on the dark light column with a color measuring device (preferably an X-RITE CI64 integrating sphere spectrophotometer in this embodiment) is the color of the laser paper.
The detection method provided by the embodiment discards the mode of color measurement on the whole paper surface in the prior art, positions the dark light column of the columnar laser paper first, and performs quality control detection by detecting the color data on the dark light column, so that the influence of rainbow stripe effect on the surface of the columnar laser paper on color quality detection can be effectively reduced, the influence of the grating structure of the columnar laser paper on measurement is reduced to the minimum, and the stable detection of the color quality of the columnar laser paper is realized.
The principle of the detection method of the embodiment is specifically as follows:
referring to fig. 6, the surface of the cylindrical laser paper has many circular grating-engraved structures, and the grating-engraved directions along the light pillar direction are the same, and the grating-engraved directions perpendicular to the light pillar direction exhibit rotation at different angles, and in one period of the laser paper, the directions of the small gratings are different, so that the light irradiation is not uniformly scattered;
in the embodiment, the direction of the light beam of the bar-shaped light source 2 is vertical to that of the laser paper to be detected, when the bar-shaped light source 2 irradiates on the small grating parallel to the light direction of the bar-shaped light source, the distances from the light to each line are different, and an optical path difference is generated and generates scattering; when the rod-shaped light source 2 is irradiated on a small grating perpendicular to its light direction, the light has the same distance to each line, there is no optical path difference, and therefore there is no dispersion, and therefore, it is dark compared to other positions. Under the irradiation of the rod-shaped light source 2 in the embodiment, the diffraction pattern on the surface of the laser paper to be detected consists of a plurality of connected rhombuses, and a straight line determined by a connecting line of two vertexes of the rhombuses in the light beam direction of the laser paper is the position of a dark light beam of the laser paper;
in this embodiment, the position of the dark light column is determined first, and this area is used as a detection area for the color quality of the cylindrical laser paper, and since no dispersion occurs on the dark light column, the color quality in this area is not disturbed by the diffraction phenomenon, and the data obtained by detecting the color quality is the color quality of the cylindrical laser paper itself.
Comparative example
In this comparative example, two control groups were set, control group 1, measuring L a b values at randomly selected test positions on cylindrical laser paper using an X-RITE CI64 integrating sphere spectrophotometer; control 2, the values of la a b were measured on defined dark columns using an X-RITE CI64 integrating sphere spectrophotometer according to the detection method of example 3; the results obtained are shown in table 1 below:
table 1 measured data of L a b values of the column laser paper
According to the data listed in table 1, the difference between the values a and b obtained when the control group 1 was randomly tested was large, which indicates that there was uncertainty in the color of the cylindrical laser paper when the value L a b of the cylindrical laser paper was measured directly by a spectrophotometer; the values of la and b in control 2: were very stable.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (7)
1. The color quality detection device for the columnar laser paper is characterized by comprising a sample carrying table (1), wherein a first rod-shaped light source (21) and a second rod-shaped light source (22) which are parallel to each other are arranged above the sample carrying table (1); the first rod-shaped light source (21) and the second rod-shaped light source (22) are horizontally arranged and are correspondingly connected with a first shell (31) and a second shell (32) along the length direction of each rod-shaped light source; a supporting mechanism (4) is further arranged on one side of the sample carrying table (1), and the first shell (31) and the second shell (32) are connected to the supporting mechanism (4).
2. The color quality detection device for cylindrical laser paper according to claim 1, characterized in that: the longitudinal sections of the first shell (31) and the second shell (32) are of inverted L-shaped structures, and the first shell (31) and the second shell (32) are symmetrically arranged and are provided with heat dissipation ports (33).
3. The color quality detection device for cylindrical laser paper according to claim 1, characterized in that: the supporting mechanism (4) comprises a transverse supporting rod (41) and a longitudinal supporting rod (42) vertically arranged at the bottom of the transverse supporting rod, and one end parts of the first shell (31) and the second shell (32) are connected to the transverse supporting rod (41).
4. The apparatus for detecting color quality of cylindrical laser paper according to claim 3, wherein: the distance between the first rod-shaped light source (21) and the second rod-shaped light source (22) is adjustable.
5. The apparatus for detecting color quality of cylindrical laser paper according to claim 4, wherein: a sliding groove (411) is embedded in the transverse supporting rod (41), a sliding block (321) extends downwards from the bottom of the second shell (32) contacted with the transverse supporting rod (41), and the second shell (32) can be far away or close to the first shell (31) through the matching of the sliding block (321) and the sliding groove (411).
6. The color quality detection device for cylindrical laser paper according to claim 1, characterized in that: the sample carrying table (1) is also provided with a calibration mechanism (11).
7. The detection method of the device for detecting color quality of columnar laser paper according to any one of claims 1 to 6, wherein the device comprises: the method comprises the following steps:
the method comprises the following steps that (1) laser paper to be detected is placed on a sample carrying platform (1), and the light beam direction of the laser paper is perpendicular to a first rod-shaped light source (21) or a second rod-shaped light source (22);
step (2), turning on a first rod-shaped light source (21) and a second rod-shaped light source (22), irradiating laser paper to be detected to form a diffraction pattern consisting of a plurality of diamonds on the surface of the laser paper, selecting one of the diamonds, marking two vertexes of the diamond in the direction of a light beam, and connecting the two vertexes to determine a straight line to be detected;
and (3) detecting any position point on the straight line to be measured by using color measuring equipment, and recording color data.
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| CN113324653A (en) * | 2021-06-07 | 2021-08-31 | 河南牧业经济学院 | Double-light-source cylindrical laser paper color detection device based on rhombic diffraction patterns |
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| CN113324653A (en) * | 2021-06-07 | 2021-08-31 | 河南牧业经济学院 | Double-light-source cylindrical laser paper color detection device based on rhombic diffraction patterns |
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