{'fraction_non_alphanumeric': 0.02732919254658385, 'fraction_numerical': 0.0, 'mean_word_length': 6.394495412844036, '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}}
Perspective of fibre‐optical microendoscopy with microlenses

Fibre‐optical microendoscopy is based on fibre‐optical confocal scanning microscopy, where optical fibres are introduced for delivery of the source and collection of the signal. Fibre‐optical microendoscopy has led to innovations in imaging of freely moving animals, long‐term imaging, minimally invasive diagnostics, and microsurgery. The lens system in fibre‐optical microendoscopy is significant because of the imaging resolution and miniaturisation possibility. State‐of‐the‐art fibre‐optical microendoscopy based on various types of lens systems is introduced and compared. The lens system contains an objective lens, a gradient index microlens, and other novel lens systems fabricated by electric arc discharge or two‐photon lithography.