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An 'average eye' for heterochromatic photometry, and a comparison of a flicker and an equality-of-brightness photometer

Publication date: 1918-04

Topics: measurements and use of instruments, photometry

Publisher: National Bureau of Standards

Collection: NBSBulletin; NISTresearchlibrary; fedlink; americana

Contributor: NIST Research Library

Language: English

Volume: Bulletin of the Bureau of Standards, Vol. 14, 87-113 (1918) Scientific Paper 299 (S299)

In connection with the proposed systematisation of heterochromatic measurements the work described was planned to show the difference to be expected between individuals and to include readings by a large number of observers so as to establish average values for various measurements involving colour differences. The paper is divided into sections dealing with: Measurements on the Ives-Kingsbury solutions for selection of observers; measurements on blue glasses; other measurements by selected observers. The conclusion is reached that the system proposed by Ives and Kingsbury appears to be reliable for colour differences of the type dealt with in the tests. The average eye established is represen