History of fiberscope development

In the early 1940s, Daniel Colladon and Jacques Babinet in Paris were the first to demonstrate the principle that refraction guides light to make optical fibers possible. In 1930, German medical student Heinrich Lamm brought together a bundle of optical fibers for the first time to take images. These discoveries led to the invention of the endoscope.
In the 1960s, endoscopes were upgraded with fiberglass, a flexible material that lets light through even when bent. While this provides users with the ability to observe in real time, it does not provide the ability to take pictures.
In 1964, the first intragastric camera came out, which was the first time that an endoscope had the function of taking pictures. This innovation enables more detailed endoscopic observation and more accurate diagnosis.
Around 1975, the era of gastric cameras came to an end and was completely replaced by "fiberscopes".