Table 3 Specs of the low-cost LF-FD-OCT and reported low-cost SD-OCT systems.
Low-cost LF-FD-OCT | Low-cost SD-OCT9 | Low-cost SD-OCT10 | Low-cost SD-OCT11 | |
|---|---|---|---|---|
Light source | SLD | SLD | SLD | SLD |
Centre wavelength | 833 nm | 840 nm | 830 nm | 830 nm |
FWHM bandwidth | 40 nm | 50 nm | 45 nm | 42 nm |
Power of illumination | 1.8 mW | ~ 1.3 mW | 0.7 mW | 0.68 mW |
B-scan range | 4.0 mm | Flexiblea | 7.0 mm | 6.6 mm |
Axial resolution (in air) | 8.3 μm | 8.1 μm | 7.0 μm | 8.0 μm |
Lateral resolution (in air) | 11.0 μm | 21.4 μm | 17.6 μm | 19.6 μm |
Imaging depth (in air) | 2.0 mm | 2.7 mm | 2.8 mm | 2.7 mm |
A-scan rate | 100,000 A-scans/s | 10,000 A-scans/s | 8,800 A-scans/s | 12,500 A-scans/s |
Sensitivity | 85 dB | 98.89 dB | 99.4 dB | 104 dB |
System cost | £6,122 | ~ £5,900 | ~ £5,800 | ~ £4,100 |
