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Fluorescent Nondestructive Testing Sensitivity Improvement through Choice of Safety Glasses

A quantitative evaluation of the relative effect of various safety glasses on inspection sensitivity was performed. This work characterized lens transmission spectra, determined penetrant and magnetic particle test media fluorescent emission spectra, measured ultraviolet A radiation source emission spectra, and determined the effect of lens choice on the fluorescent luminance of typical test media. Experimental data showed that not all lenses are equal, and one amber lens allowed a greater amount of fluoresced light from indications through to the technician’s eyes, compared to its clear counterpart.

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