色差分析及管制办法课件

Slide Title,Body Text,Second Level,Third Level,Fourth Level,Fifth Level,奇 菱 科 技 股 份 有 限 公 司,奇 菱 科 技 股 份 有 限 公 司,The Light is a range of colors,Cosmicrays,X rays,UV,IR,Radio waves,The Light is a range of colors,1st.dimension of color=the hue,1st.dimension of color=the,2nd.dimension of color,=the lightness,2nd.dimension of color,3rd.dimension of color=the saturation,3rd.dimension of color=the,Color is tridimensional,3.Saturation,2.Lightness,1.Hue,Color is tridimensional3.Satu,CIE-L*a*b*SYSTEM reduced to 2 dimensions,CIE-L*a*b*SYSTEM reduced to,Spectral energy distribution of standard illuminants,ENERGY,A,D65,400,700,Spectral energy distribution o,Light source and the influence on the color,L*=43.2,C*=54.5,h?=32.5,L*=43.5,C*=53.2,h?=28.5,Light source and the influence,x,=,A,E,R%,ExR%,=,x,D65,R%,E,ExR%,Energy distribution,Reflectance curve of thepattern,Energy multipliedby the reflectance,Light source and the influence on the color,x=AER%ExR%=xD65R%EExR%Energy,The human eye,3 types of spectral sensitive cells who react on RGB,RGB,The human eye3 types of spectr,Colour matching functions,X,X,Y,Z,400,700,500,600,Spectral sensitivity of the human eye,Colour matching functionsXXYZ4,Light reflection,A part of light is absorbed and transformed into heat,Light reflectionA part of ligh,Absorbing part,Reflectance curve,Reflecting part,400,500,600,700,%,Absorbing partReflectance curv,Illumination,Eye,object,3 elements are necessary to see a color:,the light,the object and the eye,IlluminationEyeobject3 element,Brain,Human eye,3 types of cones on the retina,Eye,BrainHuman eye3 types of cones,X,Y,Z,Tristimulus method,Numerical,values,Micro processor,Receptor section,3 filters who correspond to the human eye,These instruments are only suitable for quality control,with limited features mainly colour differences,XYZTristimulus methodNumerical,Spectrophotometric method,Curve,Numerical,values,Micro processor,Receptor section,Receptor section:multiple sensors,sensitive to a particular wavelength,High precision indispensable for absolut color data,for the recipe calculation and metamerism problems,X,Y,Z,Spectrophotometric methodCurv,X,Y,Z,X,X,=,Illuminant,Spectral reflectance,of the pattern,Tristimulus values,Color matchingfunctions,Tristimulus values,X=,E,x R,x X,Y=,E,x R,x Y,Z=,E,x R,x Z,X,Y,Z,R,E,These values can be mathematically,transformed into L*a*b*values,X Y Z XX=IlluminantSpectral re,Standard,Production,L*,+a*,-a*,-b*,+b*,Color space-,L*,The Delta L*in the color space is the difference between the,production and the standard on the vertical Lightness axis,StandardProductionL*+a*-a*-b,Standard,Production,a*,+a*,-a*,-b*,+b*,The Delta a*in the color space is the difference between the,production and the standard on the horizontal Red(,+a*,)Green(,-a*,)Axis,Color space-,a*,StandardProductiona*+a*-a*-b,Standard,Production,b*,+a*,-a*,-b*,+b*,Color space-,b*,The Delta b*in the color space is the difference between the,production and the standard on the horizontal yellow(+b*)blue(,-b*,)Axis,StandardProductionb*+a*-a*-b,Standard,Production,E*ab,The Delta E in the color space corresponds to the total color difference,using the pythagoras mathematical law for calculation.The Delta E doesnot show the direction of the color difference.For this reason it is notsufficient for an objective interpretation.Therefore,the splitted values,DL*,Da*,Db*,DC*,DH*are necessary to make a precise interpretation.,+a*,-a*,-b*,+b*,Color space-,E*,E*ab,StandardProductionE*abThe De,b*,+a,a*,+b,Color space L*a*b*,Standard,Production,b*+aa*+bColor space L*a*b*St,The metamerism,The metamerism,Metameric pair,under Daylight,L*=68.5,a*=8.7,b*=29.7,L*=68.5,a*=8.6,b*=29.2,E=0.5,Metameric pairunder DaylightL*,Metameric pair,under different illumination,L*=71.2,a*=12.8,b*=32.8,L*=71.1,a*=18.7,b*=31.8,E=6.0,Metameric pairunder different,Principle of metamerism,X,X,=,X,X,=,=,X,X,X,X,=,L*=68.5,a*=8.6,b*=29.2,L*=71.2,a*=12.8,b*=32.8,L*=71.1,a*=18.7,b*=31.8,L*=68.5,a*=8.7,b*=29.7,DE=0.5,DE=6.0,Principle of metamerismXX=XX=,Calculation examples in,the CIE-L*a*b*System,Calculation examples in,L*=71.2,a*=12.8,b*=32.8,L*=71.1,a*=18.7,b*=31.8,Sample,Standard,71.1-71.2=-0.1,18.7-12.8=5.9,31.8-32.8=-1.0,12.8,2,+32.8,2,=35.2,Standard,Sample,-0.1,2,+5.9,2,+-1.0,2,=5.9,18.7,2,+31.8,2,=36.9,36.9-35.2=1.7,5.9,2,-(-0.1),2,-(-1.7),2,=5.7,Calculation examples in the CIE-L*a*b*System,L*=71.2L*=71.1SampleStanda,塑膠製品顏色管制實務介紹,塑膠製品顏色管制實務介紹,色差分析及管制办法课件,色板表面狀況不同差異比較,色板表面狀況不同差異比較,