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OptiLayer:  Your Partner in Design and Post-Production Characterization of Optical Coatings



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Graphical tools

OptiLayer provides various tools to present graphically your results.  On the Evaluation window you can see any evaluated spectral characteristics.

reflectance transmittance plot

All evaluated spectral characteristics can be plotted. You can easily adjust types of plots, axis, scales, etc.

plot spectral characteristics

The plots can be adjusted through standard chart settings:

spectral characteristics multilayer

Along with  the main Evaluation window, you can open multiple evaluation windows and plot the same or other spectral characteristics related to the same design at different angles of incidence, polarization, spectral ranges.

Example: main evaluation window shows transmittance of a bandpass filter and target values (violet crosses)

plot spectral characteristic multilayer

For example, you may need to plot other spectral characteristics in order to better present features in the most important spectral ranges. You may need to see what happens if the angle of incidence deviates from that one that what used in the design process. 

Example: second evaluation window presents transmittance of the same bandpass filter in one of the high-transmittance ranges and in a larger scale. Spectral behavior at small incidence angles ican be also interesting:

evaluation transmittace filter

You can compare spectral characteristics of different designs at one plot or combine multiple spectral characteristics at one plot. The option and its settings are available through: Analysis --> Plot Engine:

plot spectral characteristics multilayers

Example: comparison of transmittance data of three different designs:

spectral characteristics of optical coatings

Using the powerful Analysis --> Plot Engine option you can plot dependencies of different spectral characteristics on various coordinates, namely:

  • Wavelength,
  • Angle of incidence,
  • Refractive index of the ambient medium,
  • Refractive index/Extinction coefficient of the substrate,
  • Coating coordinate,
  • Thickness of any layer (in this case additional setting - layer number - appears)
  • Refractive index/Extinction coefficient of any layer (in this case additional setting - layer number - appears)
  • Refractive index/Extinction coefficient of any material (in this case additional setting - layer number - appears)

Example: Settings and dependence of the coating transmittance (averages polarization, wavelength 1500 nm) on the refractive index of the last 58-th layer.

plot spectral characteristics

dependence spectral characteristic

You can also plot dependencies of color coordinates in any color coordinate systems on various parameters.

This powerful option can be applied in a combination with the Variator and provide all visual analysis possibilities of optical coatings designs.

You can compare dependencies related to different designs or combine dependencies calculated for different spectral or angular ranges.

You can save the plots as *.vtc2 files and combine them using stand-alone Plot Engine module.

You can export the numerical data of the plots using:

Right mouse button --> Chart --> Export --> Data --> Selection from Excel, text, HTML, etc. formats --> Save

You can modify axis, panels,  etc. using standard Chart tools.

Example: Settings and dependence of the color coordinates of the reflected light of a coating (averages polarization, chromaticities \(x\) and \(y\)) on the extinction coefficient of the second (metal-dielectric) layer.

dependence color coordinates

dependence of color coordinates

Through Analysis --> Plot Engine option you can plot characteristics as functions of one or two parameters, according to the choice Y = f(X) or Z = f (X,Y). The list of arguments includes Wavelength, the Angle of incidence, Re(n) Ambient medium, Re(n) substrate, Im(n) substrate, coating coordinate, layer thickness, and Re(n) layer. The same set of arguments is provided for Y argument if you select a Z = f (X,Y) mode. In the same frame the range for the argument (From... To), the number of points (Points) and the argument increment between the points (Step) are specified.

multilayer spectral characteristics

Example: 3D plot - dependence of the filter reflectance on the wavelength and on the incidence angle:

optical coatings spectral characteristics

All plots are ROTATABLE!

Chart Windows (windows having plots and diagrams) has additional export formats:

plot reflectance transmittance

Windows can be saved as:

  • *.bmp files (bitmap graphics format)
  • *.jpg files (JPEG bitmap)
  • *.wmf files (Windows metafiles format)
  • *.pcx files (Paintbrush format)
  • *.gif files (CompuServe bitmap)
  • *.png files (Portable Networks Graphics)
  • *.tiff files (Tagged Image File Format)

plot reflectance transmittance multilayer

The Digitize command is accessible from popup menus of Evaluation windows invoked by the right mouse button.

When any graphic plot in Evaluation, Refinement, Needle Optimization, Random Optimization and other windows is displayed, this command allows you to read exact numerical (X,Y) values of the plotted characteristics. When the Digitize command is activated, a vertical bar is displayed in the plot window to visually identify the graph point being evaluated, an additional window labeled "Values List" appears on the screen. The values list displays the exact numerical values of all spectral characteristics that are presented in the window.

spectral characteristics multilayer plot

Memorize submenu allows to store any plot for further comparison with another plot or plots. The submenu is available through

Right mouse button --> Memorize plots

spectral properties multilayer

Reports in OptiRE and OptiChar

In the Data Fitting Window, OptiRE/OptiChar compare the measurement data and corresponding model spectral characteristics:

fitting spectral measurements by model curve

OptiRE/OptiChar allow previewing the text with the information about the fitting of measurement data by theoretical spectral characteristics. This text can be saved or exported to Excel by one mouse click:

fitting experimental data by theoretical data

OptiRE present thickness errors determined in the course of post-production characterization as a diagram or as different tables of values:

thickness errors in multilayers

OptiRE presents the current systematic and random errors in layer thicknesses in the text form (Thickness Errors Report):

errors in layer thicknesses in optical coatings


OptiRE plots initial, corrected refractive indices, drifted refractive indices or/and Layer Inhomogeneities if Refractive Index Correction option was applied or/and Index Drifts (Offsets) and Layer Inhomogeneities were determined in the course of the post-production characterization:

refractive indices correction

The corresponding reports: Refractive indices Report, Index Drift Report and Inhomgeneities Report allow previewing the numerical values in the text form:

refractive index offset

OptiChar plots fitting of the experimental data by model data:

fitting of experimental data by model data

Determined refractive indices, extinction coefficients, thickness dependence of the refractive index are shown in corresponding windows:

thicn film characterization refractive index

 characterization thin film

OptiChar collects and show all layer information obtained in the course of the layer characterization in the Layer Report:

A similar report (Substrate Report) can be created if you characterized a substrate.




Easy to start

Icons 100x100 1OptiLayer provides user-friendly interface and a variety of examples allowing even a beginner to effectively start to design and characterize optical coatings.        Read more...

Docs / Support

Icons 100x100 2Comprehensive manual in PDF format and e-mail support help you at each step of your work with OptiLayer.



Icons 100x100 3If you are already an experienced user, OptiLayer gives your almost unlimited opportunities in solving all problems arising in design-production chain. Visit our publications page and challenge page.


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