Using colorimetric characteristics in developing colored optical glasses. II. Diffusely reflecting neutral glasses

This is a review of the problems that arise in developing diffusely reflect ing glasses with given color characteristics. The main object of attention is reflective neutral glasses. It is shown that the components of a glass h ave a role in making it neutral in color. The existing regulation of the qu ality of reflective neutral glasses is considered, and it is proposed that it be improved by using the CIELab equal-contrast colorimetric system, as w ell as by introducing metamerism indices into the normative documents. (C) 1999 The Optical Society of America. [S1070-9762(99)00307-3].