The refractive index of an infrared transmitting glass, AMTIR-1, has been measured at infrared wavelengths and cryogenic temperatures. Experimental data are presented for wavelengths of 7-12 micrometers ( mu m) and for temperatures of 170-350 K. The change in index with temperature, dn/dT, was determined as well. An overall accuracy in index of five parts in the fourth decimal place was achieved. In addition to results, the equipment, measurement procedures, and error estimates are also described.
|Original language||English (US)|
|Title of host publication||Proceedings of SPIE - The International Society for Optical Engineering|
|Number of pages||7|
|Publication status||Published - 1984|
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Condensed Matter Physics