Fig. 1. Schematic diagram of reflective cup

Fig. 2. Simulation diagram of reflective cup

Fig. 3. Simulation diagram of ordinary diode

Fig. 4. Physical model of reflective cup

Fig. 5. Optimal spacing at different half-light intensity angles

Fig. 6. Optimal spacing at different target surface distances

Fig. 7. Simulation diagram of double free-surface reflective cup light source modeling

Fig. 8. Illumination effect diagram of different light source spacing

Fig. 9. Simulation effect diagram of rectangular array light source

Fig. 10. Simulation effect diagram of circular array light source

Fig. 11. Simulation effect diagram of triangular array light source