Spectroscopic apparatus with dispersive device for collecting sample data in synchronism with relative movement of a focus
US8179526B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2009 |
| Grant date | May 15, 2012 |
| Priority date | — |
| Expiry date | Aug 21, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/0278
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a Raman spectroscopy apparatus, exciting light is focussed on a sample (26) as a line focus 38. Spectra from points in the line focus are dispersed in rows 46 on a CCD detector 34, having a two-dimensional array of pixels. The line focus moves longitudinally in a direction Y (arrow 48) relative to the sample. Simultaneously and synchronously, charge is shifted in a parallel direction Y′ (arrow 50) within the CCD, so that data from a given point in the sample continues to accumulate. This ensures that the data from each sample point arises from illumination which is integrated along the line focus, and makes it easier to stitch the data together subsequently to form an image of the sample. In order to provide averaging in the X direction during fast, low resolution scanning, the line focus is swept across the sample in a zig-zag fashion, between boundary lines 60.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.