A tracking fringe method for measuring the shape and position of a swimming fish

• Published in: Optics communications Vol. 173; no. 1; pp. 123 - 128
• Main Authors: Tan, Sheng, Song, Deqiang, Zeng, Lijiang
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 2000; Elsevier Science
• Subjects: Exact sciences and technology; Fringe pattern projection; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Laser tracking technique; Measurements common to several branches of physics and astronomy; Metrology, measurements and laboratory procedures; Moving object; Optical instruments, equipment and techniques; Physics; Spatial dimensions (e.g.: position, lengths, volume, angles, displacements, including nanometer-scale displacements); Spatial dimensions (eg, position, lengths, volume, angles, displacements, including nanometer-scale displacements); Laser tracking technique; Fringe pattern projection; Moving object; Optical tracking; Shape measurement; Swimming pools; Fishes; Position measurement; Measuring methods; Experimental study; Laser beams; Moving body
• ISSN: 0030-4018; 1873-0310
• DOI: 10.1016/S0030-4018(99)00595-7

A novel tracking fringe projection method is developed to simultaneously measure variations in both the position and the shape of a moving object. The method combines a commonly used fringe pattern projection method and a laser tracking technique into one optical system. In this new system, two tracking fringes are used to track the object, while one fringe is used for reference fringe. The order of conventional fringes can be determined by measuring the angle of reference fringe. The method enables us to simultaneously measure the position and shape of a moving object, such as a swimming fish.