CIE standard photometric observer
ideal observer having a relative spectral responsivity curve that conforms to the spectral luminous efficiency function for photopic vision,
Note 1 to entry: See also ISO 23539:2005(E)/CIE S 010/E:2004
Note 2 to entry: This entry was numbered 845-01-23 in IEC 60050-845:1987.
Note 3 to entry: This entry was numbered 17-170 in CIE S 017:2011.