Design implements PEN fluorescence in an interferometer for real-time ethanol volatilization detection.
Through the fluorescence characteristics of polyethylene naphthalate (PEN) material under short-wavelength excitation, a boradband light source of visible wavelengths can be generated. By combining this with the white-light source, we propose the design of a simple birefringent PEN sensor, utilized in a white-light polarization interferometer for the dynamic measurement of ethanol volatilization. Based on these experimental observations, the application of detecting variations in liquid refractive index can be validated.
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Twu et al. (2025) studied this question.
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