/// Multilayer thin film optics using the transfer matrix method.
///
/// Provides simulation of anti-reflection coatings, high-reflectance mirrors,
/// bandpass filters, edge filters, and Fabry-Perot etalons.
///
/// # References
/// - Born & Wolf, "Principles of Optics", Ch. 1
/// - Macleod, "Thin-Film Optical Filters", 4th ed.
/// - Heavens, "Optical Properties of Thin Solid Films"
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