OPTICAL SYSTEM FOR ANALYSING THE SURFACE OF A FIBROUS WEB

摘要

TITLE OPTICAL SYSTEM FOR ANALYSING THE SURFACE OF A FIBROUS WEB INVENTOR Paolo G. Cielo The apparatus for analysing the surface of a fibrous web, such as a paper or a textile, includes a prism structure in which one surface is placed in contact with the fibrous web under a predetermined pressure. A collimated beam of light is directed into the prism on the contact surface. The light reflected from the contact surface through the prism is directed to a detector. The detector senses the light reflected by the contact surface as well as the light diffracted at the contact surface to indicate the surface condition of the fibrous web.