A type of a tool that transfers image using a bundle of optical
fibers, used for inside observation of the body which is impossible from the outside directly.
Compared to a rigid endoscope consisting of lenses alone, a fiber
endoscope is flexible and can be easily bent because thin fibers are bundled, and therefore is used
to see the inside of tubular organs such as digestive tracts and blood vessels. Fiber endoscopes
are also used for industrial purposes such as inspection of the inside of pipes and jet engines.
With micro surgical tools loaded on the inside of endoscopes, a doctor can perform a surgical
operation while observing the diseased part. Research and development for making micro-surgical
tools is also in progress.