Fig. 1. Schematic of SD-OCT system

Fig. 2. 2D OCT images of different brands of automotive paint^[19]. (a) Sample 1; (b) sample 2

Fig. 3. 3D OCT images of automotive paint^[20]. (a)-(c) 3D OCT images of original, scratched and repainted automotive paint;(d)-(f) transverse sectional images of original, scratched and repainted automotive paint

Fig. 4. 2D OCT images of different brands of electrical tapes^[21]. (a) Sample 1; (b) sample 2

Fig. 5. OCT extracts fingerprint information in the middle of the tapes ^[22] . (a)3D OCT images of two layers of tapes; (b)image of fingerprint between two layers of tapes (depth:210 μm)

Fig. 6. 2D OCT image of Korean currency^[23]

Fig. 7. OCT images of blood^[24]. (a)-(b)2D OCT images of fresh blood and dry blood; (c)-(d) 3D OCT images of fresh blood and dry blood