Table 2.
Low-Cost OCT and Heidelberg Spectralis Optical System Performance
| Parameter |
Low-Cost OCT |
Heidelberg Spectralis |
| Center wavelength, nm | 830 | 870 |
| Bandwidth, nm | 42 | N/A |
| Number of pixels per A-scan | 512 | 512 |
| Scanner output power | 400–680 μW | 1.2–1.3 mW |
| Imaging depth, mm | 2.7 | 1.8 |
| Axial resolution, μm | 8.0 | 7.0 |
| Lateral resolution, μm | 19.6 | 14 |
| A-scan rate, kHz | 12.5 | 40 |
| Sensitivity, dB | 104 | N/A |
| Working distance, mm | 17.5 | 7–15(estimated) |
| Scan range (X and Y), mm | 6.6 | 9 |
| Weight, kg | ||
| With PC | 1.8 | |
| Without PC | 27.6 | |
| Volume, in3 | 250 | 3590 |
| Cost, $ | 5037 | >60,000 |
N/A indicates parameter was not available.