C218 ディジタルホログラフィによる飛行物体の姿勢計測

抄録

This paper presents the measurement method of detecting orientation of flying objects based on digital holography. Using the in-line observation system with an electronic camera in this paper, the 3D volume of light intensity is numerically reconstructed from the digital hologram captured on this system. The orientation is measured from the object positions detected using the information of the gray level gradient higher than a certain threshold, and then the translation and rotation of flying object are detected from a time-series of digital holograms. In numerical simulation, representing the object of rod as discrete and small parts linked in line, it is found from the simulation results that the RMS error is evaluated to be 0.1mm. The accuracy of the present method is visually demonstrated by comparing true position with detected one.