Glossmeter for providing a linear response corresponding to true gloss readings

摘要

A glossmeter which includes an optical head, designed to conform with TAPPI Standard 480, and an electrical console connected to the optical head by fiber optics. The optical head transmits signals corresponding to the gloss of a surface to the console. When the surface is that of a vibrating paper web, only those signals which correspond to the gloss of the surface in the measurement plane are selected by the electrical console for recording. A purge gas is introduced into the optical head to prevent the accumulation of particulate matter on the lens surface.