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Table 2 Performance parameters

From: A high sensitivity, low noise and high spatial resolution multi-band infrared reflectography camera for the study of paintings and works on paper

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 0.25 mm) 21% 20% 20%
  1. aCalculated using standard deviation from white target, ½ dynamic range, 20–40 ms exposure times, 38 lx TH lamps