Spectral Transmittance is the ratio of outgoing light intensity to incident light intensity in an optical system, indicating the system's total light loss. Measuring this property of transparent and semi-transparent materials has significant practical and application value. Examples include evaluating optical filter quality by spectral transmittance, using light transmittance as a key criterion for glass quality inspection, and testing liquid transparency in healthcare and chemical synthesis. Spectrometers provide fast, precise, and flexible solutions for these measurements, minimizing human error.
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