Detection system for birefringence measurement
US8248605B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 2007 |
| Grant date | Aug 21, 2012 |
| Priority date | — |
| Expiry date | Feb 6, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/23
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of controlling a light beam in an optical system includes a light source that directs a collimated light beam along a path, through a sample, and toward the active area of a stationary detector. The method includes the step selectively moving a lens into the path of the light beam for spreading the beam in instances where the path of the beam is altered by the sample between the source and the stationary detector The detector, therefore, is held stationary. Adjustment means are provided for increasing the intensity characteristic of the light that reaches the detector to account for a decrease in intensity that occurs when the lens is in the path of the light beam to spread the beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.