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We develop simple and reliable technique, based on suitable Interference Wedged Structures (IWSs) as small-size, tile-like 5x2x0.1 cm device - IWS Analyzer (IWSA; Composed IWSA) for registration and quantitative evaluation of Hg (harmful pollutant) in gas discharge in lamps and in air. The main advantage of the IWSA technique is its applicability for direct observation with the naked eye of an illuminated IWSA through diffused or direct light from the object under study. We present theory, simulations, and appropriate realization for IWSA.

We present further development of our solutions of attractive Interference Wedged Structure based Beam Splitters built as suitable composition of only pure glasses (using Fresnel's reflection). Theoretical treatment and experimental test show the potential for suitable parameters to reach controlled splitting in range of 26%-99%. The splitters are list-like (5x2x0.2cm) interferential constructions especially for laser light. No problematic dielectric and metallic mirrors, operating power MW/cm2, easily maintenance. We have developed, applied and improved theoretical model for description and computer treatment.