Impact of the fiber cutting angle on fiber optic proximity sensors in endoscopy

Abstract In current endoscopes, the estimation of proximity to surrounding tissue is based on experience user. To provide precise meassurement, a suitable sensor needed. This paper presents fiber optic that inserted through working channel an endoscope. The impact cutting angle at distal end optical investigated. If cut 3° axis, measurement signal in axial direction can be increased by 126mV peak (measurement accuray 4.9 mV). A 45° allows radial but with weak compared measurement. distance between endoscope tip and intestine wall up 15 mm measured. conclusion, fibers used insert low-cost By modifying angle, obtained possible.