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A Fourier Transfer Infrared (FTIR) spectrophotometer having reduced baseline noise. The system and method include internal or external optical adapters having a moveable beamsplitter for splitting the source light beam into a reference beam and a sample beam, and may include a variable bandpass filter, variable preamplifier and reversed biased photodiodes.
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The Curators of the University of Missouri, Columbia, MO
Xu, Zhi, "External/internal optical adapter with reverse biased photodiodes for FTIR spectrophotometry" (2014). UMSL Patents. 16.