Optical property measurement system and method

申请公布号：

US4288160(A)

申请号：

US19750543902

申请日期：

1975.01.24

申请公布日期：

1981.09.08

申请人：

NEKOOSA PAPERS INC.

发明人：

LODZINSKI, FRED P.

分类号：

G01N33/34;G06T1/00;(IPC1-7):G01N21/17;G01N21/86

主分类号：

G01N33/34

摘要：

In an illustrated embodiment, brightness, color, opacity and fluorescent contribution to brightness are measured by an on-line sensing head providing for simultaneous measurement of transmitted and reflected light. By measuring two independent optical parameters, paper optical properties of a partially translucent web are accurately characterized substantially independently of paper grade and weight. The instrument is designed so as to be capable of transverse scanning of a moving paper web on the paper machine, and so as to monitor desired paper optical characteristics with sufficient accuracy to enable on-line control of the optical characteristics of the paper being manufactured. Advantageously, several sets of reflectance and transmittance values based on respective common spectral response functions are sensed continuously and/or simultaneously during movement of the web.