Fig. 1. Diagram of a flexible DOE loop with tracked motion

Fig. 2. Diagram of optical system of a micro projector based on flexible DOE loop

Fig. 3. Dynamic two-dimensional DOE structure diagram caused by the tracked motion

Fig. 4. Diagram of fabricating a flexible DOE loop

Fig. 5. Speckle image of spot and light intensity distribution

Fig. 6. Speckle contrasts of control group （group 1） and experimental group （group 2） at different motion speeds in Experiment 1

Fig. 7. Line chart of daily DOE length change in Experiment 1

Fig. 8. Speckle images of control group （group 1） and experimental group （group 2） in Experiment 1

Fig. 9. Speckle contrasts of control group （group 1） and experimental group （group 2） at different motion speeds in Experiment 2

Fig. 10. Line chart of daily DOE length change in Experiment 2