Spectral imaging of a sample using a plurality of discrete mid-infrared wavelengths
US9869633B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2017 |
| Grant date | Jan 16, 2018 |
| Priority date | — |
| Expiry date | Mar 7, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/4087
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Spectrally analyzing an unknown sample (10A) for the existence of a characteristic includes (i) analyzing a first known sample (10C) having the characteristic and a second known sample (10D) not having the characteristic to identify less than fifty diagnostic spectral features, each diagnostic spectral feature being present at a different diagnostic wavelength in a mid-infrared spectral region; (ii) directing a plurality of interrogation beams (16) at the unknown sample (10A), each of the interrogation beams (16) having a different interrogation wavelength, and each interrogation wavelength corresponding to a different one of the diagnostic wavelengths; (iii) acquiring a plurality of separate output images (245) of the unknown sample (10A), wherein each of the output images (245) is acquired while the unknown sample is illuminated by a different one of the interrogation beams (16); and (iv) analyzing less than fifty output images (245) with a control system (28) to determine whether the characteristic is present in the unknown sample (10A).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.