Fiber-optic spectroscopic probe with reduced background luminescence
US6038363A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1997 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Aug 26, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/44
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fiber-optic spectroscopic probe minimizes unwanted sources of luminescence through the use of one or more non-luminescing beam-redirecting elements operative to aperture share the optical collection path. Preferably, the beam-redirecting element is reflective, and may take the form of a spot mirror on an otherwise optically transparent window to fold at least a portion of the excitation radiation into the optical collection path or a mirror having a centralized aperture may be used to introduce the excitation radiation into the optical collection path. In either case, the excitation radiation may first pass through a dispersive element in a bandpass filter configuration. Several complete fiber-optic-based probe head designs are disclosed along with results indicating reduced luminescence, spurious fluorescence, in particular.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.