Apparatus and method for analyzing parameters of a fibrous subst

Details Apparatus and method for analyzing parameters of a fibrous subst Apparatus and method for analyzing parameters of a fibrous subst

1985-02-04

1987-03-10

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

162 49, 162263, 250559, 250571, 356429, 356432, G01N 2186

Patent

active

046487123

ABSTRACT:
A radiation sensor provides on-line measurement of web MD/CD fiber orientation ratio, formation indexes of multiple spatial frequencies, and optical density as it relates to basis weight. A light source illuminates one side of a substrate to be measured. The radiation passing through the substrate is detected by a pair of detectors having fields of view along narrow strips which are perpendicular to each other. The combined field of view is scanned in a repetitive pattern traversing an area on the substrate to be analyzed. The detector outputs are processed to provide fiber orientation ratio, formation, and basis weight measurements.

REFERENCES:
patent: 3193688 (1965-07-01), Morton et al.
patent: 3207901 (1965-09-01), Barker, Jr.
patent: 3437823 (1969-04-01), Joyce

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