Table 1.
Key characteristics of the OCT systems. Information on the C-OCT system is gained from the official website: vivosight.com/researcher. The skin tissue is assumed to have a refractive index of n = 1.35. *: Based on the fast-axis lateral pixel-step in the exported images. †: The scanning area chosen for this specific study. ‡: Measured with photo-diode S122C from Thorlabs.
| System feature | C-OCT | UHR-OCT |
|---|---|---|
| Operating wavelength (nm) | 1305 | 1270 (1070–1470) |
| Axial optical resolution in tissue (μm) | < 5 | 2.2 |
| Lateral optical resolution in air (μm) | < 7.5 | 6 |
| Depth of focus (mm) | 1 | 0.05 (Rayleigh length) |
| * Axial digital sampling in tissue (μm) | 4.12 | 1.46 |
| * Lateral digital sampling (μm) | 4.41 | 2.93 |
| † Scanning area (mm × mm) | 4 × 4 | 3 × 3 |
| ‡ Optical average power applied (mW) | 5 | 5 |