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Glass filters for checking performance of spectrophotometer-integrator systems of color measurement

1962; The National Institute of Standards and Technology; Volume: 66A; Issue: 3 Linguagem: Inglês

10.6028/jres.066a.020

2376-5704

Harry J Keegan, John C Schleter, Deane B. Judd,

Color Science and Applications

A set of fi ve spec ia lly selected colored-glass fil ters to identify va ri a bles of m a lfun ction of photoelectri c recordin g spectrop hoto lTl.ctcrs cq uipped wit h tristim ulus integrators have been standa rdi zed on a number of spectrop hoto meters corrected for all known errors (wavelen gth, ze ro, 100 p ercen t, sli t-w idth , ine rt ia, bac k-reflectance, and stray-energy).T o these standardi zed spectrop hoto metric d ata de fi nite a moun ts of t hese errors were deliberately introdu ced and co nve rted to t ri stimulus va lues a nd chromaticity coordinates of the International Com m ission of Illumin ation syste m of colorimetry for So urces A, E , a nd C. Simila r r eductions s how t he effects of slit widt hs of 1, 5, 10, a nd 15 millimi crons (nw) on compu ted r es ults both by t he selected-ordin ate method of 10, 30 , a nd 100 ordin ates, a nd by t he we ighted-ordinate met hods of 1-, 5-, 10-, a nd 15-ml" in ter vals.Duplicate se ts of these glasses have been evaluated by visual co mpa ri so n w it h t his set of m aster standards, and a re availa ble as pa rt of t he Stand ard M a teri a ls P rogra m of the N atio nal B ureau of Standa rds.By co mpa ring t he ce rt ified values of lumin ous tra nsmi ttance a nd chro maticity coord inates for a set of t hese glasses wi t h t he values obtained on a par ticular in teg rator-spectrop hotometer co mbinatio n, t he type an d extent of instru mental errors ma.v be evaluated .