Table 2 Performance parameters
Parameter | 1100–1400 nm | 1500–1800 nm | 2100–2400 nm |
|---|---|---|---|
Light flux level at the art object | 30–50 lx | ||
Noise in reflectance units from a 99% diffuse reflectora | >1000: 1 or <0.1% reflectance | 1000: 1 or <0.1% reflectance | 500:1 or 0.2% reflectance |
Modulation at Nyquist (at 0.25Â mm) | 21% | 20% | 20% |