{'fraction_non_alphanumeric': 0.022598870056497175, 'fraction_numerical': 0.02448210922787194, 'mean_word_length': 4.215686274509804, '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': 1, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Development of a high-speed spectroscopic imaging system over a wide frequency range with THz-TDS

A THz-TDS imaging system has been newly designed. It covers a wide frequency range between 0.1 and 7 THz by using a DAST crystal as a THz-wave source. Since a delay stage slides at high speed with a high degree of accuracy, the waveform is reproducible. The data processing is efficient with the data acquisition at 100 MHz. A spectroscopic image of 20×20 pixels can be obtained in approximately 3 min with the resolution of 15 GHz.