THEORETICAL ASPECTS OF MESOPIC PHOTOMETRY AND THEIR IMPLICATION IN DATA ASSESSMENT AND INVESTIGATION PLANNING

There is no photometric standard observer for the mesopic region, but five systems of mesopic photometry have been proposed, each based on i ts own experimental data set. Brit more experimental data are required , especially for parts of the colour gamut. In order to make the best usf of Existing data and ra optimize the value of new data, theoretica l aspects Meed to be considered. These lend to the conclusion? that no t all data are acceptable. (C) 1998 John Wiley & Sons, Inc. Col Res Ap pl, 23, 264-273, 1998.