Method and apparatus for optical alignment of a measuring head i

Details Method and apparatus for optical alignment of a measuring head i Method and apparatus for optical alignment of a measuring head i

1996-03-25

1998-02-03

Le, Que

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

250548, 356429, G01N 2186

Patent

active

057147639

ABSTRACT:
A two-dimensional position detector, in combination with dynamic z and/or flutter sensors, provides dynamic misalignment detection and correction of a measuring head, thereby allowing accurate determinations to be made of properties of a sheet material, such as basis weight.

REFERENCES:
patent: 5654554 (1997-08-01), Feller et al.

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