Method and device for evaluation of surface properties, especially molecular orientation, in non-transparent layers
US5365067A · kind A · utility
19Cited by
7References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 30, 1993 |
| Grant date | Nov 15, 1994 |
| Priority date | — |
| Expiry date | Jun 30, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/21
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for determining surface molecular orientation and related properties of an opaque polymeric sheet relies on the detection of relative intensity of spectral reflectance in at least one polarized beam reflected from the surface of the sheet rather than transmitted therethrough. The relative intensity is affected by the preferential orientation of the polymeric chains. The method is fast and can be applied on-line at a speed of the running sheet as high as 1000 m/s.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.