Fig. 1. Distribution structure of cylindrical LED array

Fig. 2. Two-dimensional profile of ring array

Fig. 3. Arrangement. (a) Layout of curved panel; (b) partial enlarged view of panel

Fig. 4. Spectral distribution of LED

Fig. 5. Simulation results of one-dimensional linear array. (a) Structure diagram; (b) distribution of illumination

Fig. 6. Normalized distribution of illumination at different angles of two ring LEDs. (a) 2θ=15°; (b) 2θ=16°; (c) 2θ=17°

Fig. 7. Simulation result of ring illumination. (a) Structure diagram; (b) normalized illumination distribution

Fig. 8. Simulation result of 9×7 ring array illumination. (a) Structure diagram; (b) normalized illumination distribution

Fig. 9. Rotating receiver

Fig. 10. Two-dimensional diagram of probe