A Reduction in the Rotational Velocity Measurement Deviation of the Vortex Beam Superposition State for Tilted Object

• DOI: 10.3390/photonics11070679
• Publication Date: 2024-07-23T15:06:42Z
• Authors: Hongyang Wang; Yinyin Yan; Zijing Zhang; Hao Liu; Xinran Lv; Chengshuai Cui; Hao Yun; Rui Feng; Yuan Zhao
• Keywords: Relative velocity

In measuring object rotational velocity using vortex beam, the incident light on a tilted causes spectral broadening, which significantly interferes with identification of true Doppler shift (RDS) peak. We employed decomposition method to analyze relationship between extremum and central frequency caused by tilt. Compared linear growth trend observed when calculating peak maximum amplitude, calculation effectively reduced deviation rate RDS measurement value from value, even at large tilt angles. This approach increased angle for 1% relative error 0.221 0.287 rad, representing 29.9% improvement. When was 0.7 reduction can reach 5.85%. Our work provides crucial support achieving high-precision object.