### Evaluation of color characteristics

OptiLayer provides calculations of color properties in almost all existing color coordinate systems. You can view color coordinates in a graphical or tabular forms.  Light source, detector, observer, integration step, reference white and incident angle used for color evaluation are specified. OptiLayer provides a set of power options and color targets allowing you to design coatings with specified color properties.

### Tristimulus values and chromaticities

 XYZ CIE 1931 color space. Color coordinates are called tristimulus values X, Y, Z and determined as:  $$X=\int\limits_{380 nm}^{780 nm} x(\lambda) E(\lambda) d\lambda$$ $$Y=\int\limits_{380 nm}^{780 nm} y(\lambda) E(\lambda) d\lambda$$ $$Z=\int\limits_{380 nm}^{780 nm} z(\lambda) E(\lambda) d\lambda$$ Color basis functions $$x(\lambda),\; y(\lambda),\; z(\lambda)$$ All colors can be represented on the chromaticity diagram: The chromaticity of a color can be specified by two parameters x and y, which are functions of tristimulus values X, Y, Z:   $$x=\displaystyle \frac{X}{X+Y+Z},\;\;y=\frac{Y}{X+Y+Z},\;\;z=1-x-y$$ Y is the luminance factor. The larger is Y, the brighter is the color. On the chromaticity diagram: Pure spectral colors are on the boundary of the diagram; Reference white points RGB triangle Planckian locus Corresponding numerical values of color coordinates can be observed in spreadsheets:  •  Start
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### Easy to start OptiLayer provides user-friendly interface and a variety of examples allowing even a beginner to effectively start to design and characterize optical coatings.        Read more...

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