Fiberscope
A fibrescope is a flexible optical fibre bundle with an eyepiece at one end, and a lens at the other. It is used for inspection work, often to examine small components in tightly packed equipment, when the inspector cannot easily access the part requiring inspection.
The lens is often a wide-angle lens, and the eyepiece is occasionally instead connected to a camera. Some fibrescopes use an additional fibre to carry light from an external source to illuminate the material being inspected, for clearer viewing.
All fibrescopes introduce a certain amount of image distortion; much of this is similar to the distortion of modern night vision equipment.
fibrescopes are used in medicine, machining, computer repair, espionage, locksmithing, safecracking, and computer forensics, among many other uses.