Title: Surface finish monitor

Abstract: The purpose of this invention is to reveal the surface properties, such as smoothness and resulting printability of a rapidly moving strip of material, such as paper. To accomplish this, the production process is continuously monitored, without error due to environmental conditions such as dust and dirt on optical surfaces, temperature affects, lamp degradation, etc. An index of printability relative to smoothness is obtained by integrating the plateau areas in the optical field of view. A unique combination of approach angle, selected wave length of infra red radiation, horizontal polarization of search beam, and use of four optical paths to obtain mathematical model equivalency, is employed.

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Inventors: Bowers, Kenneth (Sunnyvale, CA, US)

Application Number: 753193
Filing Date: 1976-12-22
Publication_date: 1978-11-07
Assignee:
Primary Class(es): 250/559.09 250/341.7, 250/359.1, 356/369, 356/430, 356/448
Other Classes:
US Patent Ref:

3636361	Jan, 1972	Bowers	356/212.
3734624	May, 1973	Cornelius	356/200.

Other Refs: 1,080,432

Dec, 1954	FR

Primary Examiner: Mullins, James B.
Assistant Examiner:
Attorney: