Fig. 1. Direct detection of surface scattering light

Fig. 2. Measurement coordinate system

Fig. 3. Schematic diagram of system

Fig. 4. Illuminance-signal curve under uniform illumination

Fig. 5. Spatial distribution of radiation flux measured when the measured plane is evenly divided with different spatial resolutions under uniform illumination (left) and its theoretical calculation results (right). (a) 8×8; (b) 16×16; (c) 32×32

Fig. 6. Actual illuminance distribution and theoretical illuminance distribution to achieve uniform radiation flux distribution(resolution: 8×8). (a) Actual illuminance distribution; (b) theoretical illuminance distribution

Fig. 7. Detection of total radiant flux of ceramic tile (illuminance design distribution on sample)

Fig. 8. Seven samples. (a) Sample a; (b) sample b; (c) sample c; (d) sample d; (e) sample e; (f) sample f; (g) sample g

Fig. 9. Two cracked samples. (a) Sample 1; (b) sample 2

Fig. 10. Scratch sample