A stereo-fiberscope with a magnetic interlens bridge for laryngeal observation
Osamu Fujimura, Thomas E. Baer, Seiji Niimi · The Journal of the Acoustical Society of America · 1979
A stereoscopic method of observation of the larynx and the pharynx during speech utterances has been devised, making use of fiber-optic cables and a magnetic bridge. The cables are inserted via the subject's nostrils. The bridge makes the two objective lenses at the tips of the cables abut within the pharynx near the uvula, and the two images viewed through the separate lenses at the prescribed mutual distance are recorded on each frame of a 16-mm film side by side for computer processing of the three-dimensional data.