Optically coupled infrared transmitting composite internal reflecting elements
US5616922A · kind A · utility
Inventors
Key dates
| Filing date | Jul 11, 1995 |
| Grant date | Apr 1, 1997 |
| Priority date | — |
| Expiry date | Jul 11, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/3577
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method for spectroscopic or radiometric analysis of solid, liquid, or gas samples includes first and second optically transmitting materials. The first optically transmitting material has selected bulk optical transmission and index of refraction properties which enable infrared radiation transmission therethrough across selected optical transmission ranges. The first optically transmitting material is of a type which normally has chemical or mechanical degradation when in contact with the sample during spectroscopic or radiometric analysis. The second optically transmitting material is preferably a wafer or thin sheet in optical/mechanical contact with the first optically transmitting material. The second material is designed to be located between the first optically transmitting material and the sample all held in a fixture or fixtures to prevent the sample from contacting the first material during spectroscopic or radiometric analysis of the sample. The second optically transmitting material: i) is chemically resistant to the sample, ii) is constructed of a material which prevents significant physical degradation of the second material when the sample contacts t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.