Usually, Fresnel's law is written in its simplified form, for the case when the medium from which a ray falls onto two media interface, is transparent (i.e., its extinction coefficient is equal to zero or very small). However, in some instances (e.g., in photolithography, or in studying the reflectance of paints and various coatings on metallic substrates), it is impossible to neglect absorptance of the first medium because this might lead to incorrect physical results. Fresnel-C is intended to calculate Fresnelian phenomena at the interface of two media with the complex refractive indices. Fresnel-C is recommended for researchers working in areas of optical radiometry, photometry, optical technology, and also for in-depth studying of Fresnelian reflection.

Fresnel-C doesn not require special efforts for installation. Just download the Evaluation version, unzip it, save Fresnel-C folder anywhere on the hard drive, and run Fresnel-C.exe. The Evaluation Version has several restrictions (see details in the appropriate Section of the Manual.) After purchasing the product license, you'll receive an activation key which will turn the Evaluation Version into the full-functioned unrestricted program. The Software Licence Agreement is included into the Manual. Go to the Purchase page to see how to buy the license.

Fresnel-C is the simple but powerful program allowing to compute and plot against the incidence angle reflectance and transmittance at the interface of two media with complex refractive indices according to  Fresnel's equations. In addition, Fresnel-C calculates the polarization degree of reflected and transmitted optical radiation as well as critical, Brewsters and pseudo-Brewsters angles. For details, see Fresnel-C Key Feature list or download Fresnel-C Manual.

Download Fresnel-C Evaluation Version (1.1 MB)

Download Fresnel-C Manual (1.2 MB)

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Fresnel-C Key Features
Calculation of the following quantities at the interface of two media with the complex refractive indices:
Reflectance Rp for p polarization state
Reflectance Rs for s polarization state
Reflectance R for unpolarized radiation
The ratio Rp / Rs
Transmittance Tp for p polarization state
Transmittance Ts for s polarization state
Transmittance T for unpolarized radiation
Polarization Degree PR for reflected radiation
Polarization Degree PT for transmitted radiation
Possibility of incremental calculations for each incidence angle from Min to Max for the functions listed above
Possibility of interactive real-time calculations of these functions of the incident angle by changing optical constants for both media
Tabular and graphical representation of calculation results
Fully editable graphs can be saved or exported as bitmap (*.bmp) or Windows metafile (*.wmf, *.emf)
Numerical results can be saved in text files, XLS-files (MS Excel spreadsheets), and as XML and HTML tables
Requirements to hardware and software:
Screen resolution          1024 x 768
OS                              MS Windows 2000/ME/XP/Vista/7/8 (in compatibility mode)