Spectrometric device and method for recognizing atomic and molecular signatures
US5801826A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 18, 1997 |
| Grant date | Sep 1, 1998 |
| Priority date | — |
| Expiry date | Feb 18, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Complex atomic or molecular spectral signatures embedded in interfering background spectra are very rapidly recognized by a spectrometric device that employs precise sweep rate control with signal slope extraction. Very fast optics become feasible. High signal to noise ratios are attained in each of three operational modes. The first, PURGE, is frequently invoked and stores an ambient background pattern in differentiated form. The second, TARGET, stores a signature derived from a target substance placed within the invention's sensing range. The signature retains only signal derivatives that significantly depart from those encountered during PURGE. A SEEK mode employs a similar derivative extraction algorithm, and searches for matches to TARGET signatures stored in a memory bank. During SEEK, pattern correlations to stored targets are sensed, and results displayed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.