Non-pressure-dependancy infrared absorption spectra recording, sample cell
US4980551A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 5, 1990 |
| Grant date | Dec 25, 1990 |
| Priority date | — |
| Expiry date | Jan 5, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/0392
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A non-pressure-dependancy infrared absorption spectra recording, sample holder comprises a sample holder having an infrared light beam transmitting passage, two windows of infrared light transmitting material in the passage in face-to-face contact, with at least one window having an inner surface portion contoured to provide between the windows a sample space shaped to provide adjacent light beam paths which are different in length and a clamp for resiliently clamping the windows in the sample holder. A deformable sample is lightly compressed to fill the sample space, and an infrared light beam is passed through the sample. The adjacent light beam paths being of different lengths avoids optical interference fringes so that absorption spectra of the sample can be recorded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.