Transflectance probe having adjustable window gap adapted to measure viscous substances for spectrometric analysis and method of use
US5708273A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 9, 1996 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | May 9, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/8507
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An infrared spectroscopy instrument having a transflectance type probe with an adjustable path length is disclosed. The instrument is adaptable to take both reflectivity and transmission type measurements. According to a method of use of the instrument discloses a material undergoing a change in viscosity and optical density can be measured by appropriately adjusting the path length to allow a sample of the material to enter. At a first interval, a first measurement is made using the instrument according to a transmission protocol. A second measurement is made of the sample when the sample is viscous and optically dense at a second interval using the same instrument according to a reflectivity measurement protocol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.