Photometric Measurements
- Luminance: quantitative measure of brightness
- measured with spot photometer
- English units: foot-lamberts (fL)
SI units: candela/m2 (nit)
1 fL = 3.426 cd/m2
- Spectral Radiance: radiation power as a function of wavelength
- measured with spectral radiometer
- units: mW/(cm2 X nm of radiation X steradian)
Pixel Contrast Ratio is computed based on luminance values measured with a spot photometer