Ambient temperature reference device
US5399856A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1993 |
| Grant date | Mar 21, 1995 |
| Priority date | — |
| Expiry date | Oct 6, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/3595
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for establishing an ambient temperature correction having (a) at least one reference surface which adequately represents the black body radiation spectrum of the air column between a long-path FTIR spectrometer and the infra-red source and (b) at least one means for shielding the reference surface from external sources of radiation gain or loss. In a preferred embodiment, the reference surface is made of thin metal having a blackened surface surrounded by an insulating shield. It is also preferred that a means for promoting positive air circulation across the reference surface or surfaces be included in the device of the present invention. This device is positioned in a location such that the field of view of the long-path FTIR spectrometer will be covered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.