{'fraction_non_alphanumeric': 0.025487256371814093, 'fraction_numerical': 0.0, 'mean_word_length': 5.747474747474747, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Quantum cascade laser back‐reflection spectroscopy at grazing‐angle incidence using the fast Fourier transform as a data preprocessing algorithm

A simple optical layout for a grazing‐angle probe (GAP) mount for coupling to a midinfrared (MIR) quantum cascade laser (QCL) spectrometer is described. This assembly enables reflectance measurements at high incident angles. In the case of optically thin films and deposits on MIR reflective substrates, a double‐pass effect occurs, which is accompanied by the absorption of deposited samples in a reflection‐absorption infrared spectroscopy modality. The optical system allows MIR light to pass through the sample twice.