Accession Number : AD0459033

Title :   INFRARED OPTICAL MATERIALS WITH TRANSMISSION IN THE 8-14 MICRONS AND 1-10 MILLIMETERS REGIONS.

Descriptive Note : Final rept. 16 Jun 62-15 Oct 64,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE CRYSTAL PHYSICS AND OPTICAL ELECTRONICS LAB

Personal Author(s) : Smakula, A.

Report Date : 11 MAR 1965

Pagination or Media Count : 80

Abstract : Optical, dielectric and mechanical properties of alkaline earth fluorides and lead halides have been studied. Purification and growing methods for these crystals and their solid solutions have been established. Crystals were grown from the melt and CaF2 also from the vapor phase. The influence of impurities, contamination during growing, and irradiation on the optical properties has been studied. Properties of pressed material (Irtran 2) have been compared with those of single crystals of CaF2. Absorption edges of lead halides in the ultraviolet and infrared regions have been determined. The microhardness of CaFeBrF2 and SrF2-BaF2 mixed crystals has been determined as a function of composition, and in PbCl2 and PbBr2 as a function of crystallographic direction. (Author)

Descriptors :   (*INFRARED OPTICAL MATERIALS, DIELECTRICS), ALKALINE EARTH COMPOUNDS, FLUORIDES, LEAD COMPOUNDS, HALIDES, CRYSTAL GROWTH, CALCIUM COMPOUNDS, IMPURITIES, BROMIDES, CHLORIDES, BARIUM COMPOUNDS, STRONTIUM COMPOUNDS, PURIFICATION, ZONE MELTING, CRYSTAL STRUCTURE, MANGANESE COMPOUNDS, OXIDES, DIELECTRIC PROPERTIES, OPTICAL PROPERTIES, MECHANICAL PROPERTIES, SINGLE CRYSTALS.

Distribution Statement : APPROVED FOR PUBLIC RELEASE