Method for determining a characteristic of a material
US5695039A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 1995 |
| Grant date | Dec 9, 1997 |
| Priority date | — |
| Expiry date | Jan 10, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/21
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method for determining a characteristic of a material, such as composition and/or color, has an electromagnetic radiation source having a first amount of circular polarization. The electromagnetic radiation from the source has the capability of passing through the material. A processor determines the characteristic of the material based on changes in the electromagnetic radiation caused by passing through the material. Changes in electromagnetic radiation include changes in rotation. Additionally, the processor may determine what, if any, electromagnetic radiation was blocked by the material and the amplitude of the electromagnetic radiation passing through the material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.