Continuous self-absorption correction in sphere photometry measurements

摘要

Knowing about self-absorption differences during sphere photometry measurements is important, but the need to correct for it depends on factors like the lamps and hardware, the size of the sphere and the reflectivity of the paint used. Traditional correction methods are simple substitution and the short-term use of an auxiliary lamp. The ideal solution is to know the self-absorption factor for each lamp measured at any interval. Continuous self-absorption correction solves all the issues associated with the correction. It will provide a factor for every lamp tested at any time during its life cycle. The size of the change in hardware is irrelevant. The correction is spectral and will yield correct color measurement even with large colored fixtures. The correction will also take care of the changes in sphere responsivity as the system calibration ages. Extra requirement are the need for a very stable auxiliary lamp and additional quality control measures.