Spectroscopic analysis apparatus and method with excitation system and focus monitoring system
US7583380B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2004 |
| Grant date | Sep 1, 2009 |
| Priority date | — |
| Expiry date | Jan 14, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/44
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to an analysis apparatus, in particular a spectroscopic analysis apparatus, for analyzing an object, such as blood of a patient, and a corresponding analysis method. To aim the confocal detection volume inside a blood vessel orthogonal polarized spectral imaging (OPSI) is used to locate blood capillaries in the skin. An imaging system (img) with slightly shifted imaging planes (i1, i2) for OPS imaging of blood vessels is proposed to provide auto-focusing. The confocal Raman detection plane (dp) is located in between these two imaging planes (i1, i2). Based on measured amount of defocus for the imaging planes (i1, i2), the focusing of the imaging system (img), the excitation system (exs) for exciting the target region and the detection plane (dp) is located inside the blood vessel (V). Thus, continuous auto-focusing with high accuracy can be achieved. The invention relates also to an optical tracking system for continuously tracking a point of a moving object (obj).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.