Figure 7.

(a) Comparison between the brightness of the optical source without reference fiber and the brightness of the optical source after self-compensation processing during use. (b) Gray value curves of elastic fibers of five fingers under six consecutive different gestures. (c) The index finger is bent 6 times of different amplitude, and the bending radius is gradually increased until it is completely straight. (d) The average gray value curve of the index finger in the process of repeatedly bending and stretching 50 cycles.