ISO 9358:1994 Preview
Optics and optical instruments -- Veiling glare of image forming systems -- Definitions and methods of measurement
This standard was last reviewed and confirmed in 2014. Therefore this version remains current.
Adopts both the veiling glare index (VGI) and the glare spread function (GSF) as measures of the veiling glare characteristics of optical and electrooptical imaging systems. Laboratory measurement techniques are described in general terms and recommendations are made regarding the performance of the main subunits of the equipment. The measurement techniques described are chiefly valid for the visual spectral range. Also gives guidelines for the operation of measuring equipment such that accurate results can be achieved.