Fig. 1. Basic principle of OCT^[3]

Fig. 2. Comparison of three scanning types

Fig. 3. Structure of LF-SD-OCT system

Fig. 4. Combination system of AO-LF-OCT and LSO^[87].(a)System structure; (b)AO-LSO image; (c) AO-OCT image

Fig. 5. Combination system of LF-OCT and SI^[90]. (a) System structure; (b) imaging results

Fig. 6. SmartOCT system integrated with mobile phones^[66]. (a) System structure and physical object; (b) corneal imaging result

Fig. 7. LC-OCT system^[96]. (a) System structure (b) integration solution

Fig. 8. Special modes. (a) Grating generated OCT^[105]; (b) SELF-OCT^[108]

Fig. 9. Corneal and polymer PS-OCT images. (a) Corneal OCT^[111]; (b) corneal PS-OCT^[111]; (c) polymer OCT^[115]; (d) PS-OCT obtained when the temperature of the polymer decreases by 2 ℃^[115]

Fig. 10. OCE graphs of silicone rubber film varying with temperature^[124]. (a) Cross sectional image at 50 ℃; (b) 49 ℃; (c) 48 ℃; (d) 47 ℃; (e)46 ℃

Fig. 11. Tomographic images with endogenous contrast of normal mouse dorsal skin fold window^[127]. (a) Conventional OCT image; (b) color OCT image

Fig. 12. OCT images of human limbal crypt cells^[59]. (a) Lower corneal margin of a healthy eye; (b) complete OCT image; (c) partially enlarged OCT image; (d) histological image of crypt cells

Fig. 13. LC-OCT images of human skin^[63]. (a) Back of the hand; (b) palm of the hand

Fig. 14. OCT images of glass samples^[144]. (a)(b) Sample with surface defects; (c)(d) sample with internal defects; (e)(f) sample with bubble defects