Interference fringe analysis device, interference fringe analysis method, and distance measurement device

摘要

PROBLEM TO BE SOLVED: To provide an interference fringe analysis technique capable of obtaining an interference fringe frequency with higher accuracy and higher resolution. [Solution] The interference fringe analysis device 12 detects a Fourier transform unit 120 for converting an interference fringe signal into a spectrum in a spatial frequency domain, and a spatial frequency of a peak having a maximum light intensity among peaks included in the spectrum as a reference frequency f