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. 2019 Dec 18;11(1):316–329. doi: 10.1364/BOE.376782

Fig. 2.

Fig. 2.

Schematic diagram of the experimental setup for FMF curvature sensing evaluation. L is the distance between the two stages, d is the bending displacement of the FMF, Δy is the displacement along y-direction, θ is the half angle of the sector, R is the bending radius.