You Ding, Yuansheng Ding, Song Qiu, Tong Liu, Yuan Ren. Rotational frequency detection of spinning objects at general incidence using vortex beam (Invited)[J]. Infrared and Laser Engineering, 2021, 50(9): 20210451
- Infrared and Laser Engineering
- Vol. 50, Issue 9, 20210451 (2021)
Fig. 1. (a) A vortex beam illuminates on the surface of a rotating object vertically; (b) Pointing vector distribution of vortex beam
Fig. 2. (a) A vortex beam illuminates on the surface of a rotating object at general incidence; (b) Coordinate systems of the vortex beam and beam spot on the object surface
Fig. 3. Simulated distribution of rotational Doppler frequency shift at general incidence of vortex beam
Fig. 4. (a) Experiment setup of RDE; (b) Digital hologram of superimposed LG vortex; (c) Simulated intensity pattern; (d) Experimental intensity pattern; (e) Experimental intensity pattern of reflected beam
Fig. 5. Experimental frequency spectrum of RDE at coaxial incidence of vortex beam
Fig. 6. Experimental frequency spectrum of RDE at general incidence of vortex beam
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