Web inspection system having a product characteristic signal nor

Details Web inspection system having a product characteristic signal nor Web inspection system having a product characteristic signal nor

1981-12-23

1985-09-03

Rosenberger, R. A.

Optics: measuring and testing

By monitoring of webs or thread

For flaws or imperfections

250563, G01N 2132

Patent

active

045389152

ABSTRACT:
An inspection system of the type having a rotating multifaceted mirror and a radiation collecting arrangement is characterized by a network in which the signal representative of the web being inspected is compensated for deviations superimposed on that signal due to variations in the reflectivity among the various mirror facets and normalized for variations in the optical efficiency of the radiation collecting arrangement.

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