Patent · US Expired

Mid-infrared fiber-optic spectroscopic probe for use at elevated temperatures

US5923808A · kind A · utility

5Cited by
6References
10Claims
0Family size

Inventor

Key dates

Filing dateJun 23, 1997
Grant dateJul 13, 1999
Priority date—
Expiry dateJun 23, 2017

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10S385/902
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A mid-infrared spectroscopic probe attached to a fiber-optic cable comprises an optically transparent, heat-insulating crystal which is placed between the ATR crystal and the end of the fiber-optic cable so as to provide optical coupling from the cable to the ATR crystal while protecting the fiber-optic assembly inside the cable from excessive heat when the probe is used in high-temperature sample streams. The ATR crystal is tapered outwards towards the sampling end to ensure that pressure from the sample stream, e.g., in a plastics extruder, does not displace the crystal, but rather forces it into tighter contact with the seal in the probe head.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.