Fig. 1. Schematic diagram of SD-OCT system

Fig. 2. Extraction principle of phosphor area fraction. (a) Scan area; (b) white LED OCT image; (c) central 1D signal; (d) non-white LED OCT image; (e) binary image of extraction area

Fig. 3. Extraction process of phosphor area fraction

Fig. 4. Images of white LED before and after phosphor sedimentation. (a)(b) OCT and slice image before sedimentation; (c) (d) OCT and slice image after sedimentation

Fig. 5. Measurement results of phosphor sediment thickness. (a)(b) Outlines of phosphor sediment in OCT and slice images; (c) thickness distribution and error; (d) maximum absolute error and mean absolute error

Fig. 6. White LED OCT images with different standing time

Fig. 7. Area fraction of phosphor with different standing time

Fig. 8. Whole set of white LED and OCT scan path