Lissajous scan from an optical fiber scanner (June 2023)

Optical devices are frequently being used in medical applications to image lesions and malignancies, assist with surgical procedures. The advances micro-electro-mechanical systems (MEMSs) optics led the fabrication of flexible endoscopes as small a few millimeters diameter. design sub-millimeter sized optical fiber scanner is presented this paper. proposed consisted vibrating that carried laser light targeted imaging sample. desired vibratory motion scanning device was obtained using U-shaped electrothermal actuator where asymmetry actuator’s arm length caused free end actuating bend allowing bidirectional at its end. periodic square current wave passing through it timely manner. By matching signal frequency resonant cantilever placing appropriately relative actuator, distal allowed follow Lissajous scan. In scanners, scan pattern normally pair actuators. This paper presents providing 2D single actuator. Such technique can provide basis for development forward-viewing endoscopic catheters, whereas smallest endoscope has diameter 1.2 mm. field, such potential cavities body increasing diagnostic yield