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Title: Optical materials characterization. Semi-annual technical report 1 Feb--31 Jul 77

Technical Report ·
OSTI ID:5069530

The refractive index of fusion cast CaF/sub 2/ was measured at room temperature over the wavelength range 0.2144 to 8.662 mm and the data were fitted to a Selmeier type equation. Measurements of refractive index of hot forged CaF2 were extended to the wavelength range 0.2024 to 0.2483 mm. Data are presented for dn/dT of single crystal specimens of CaF/sub 2/, BaF/sub 2/, reactive atmosphere processed (RAP) KC1 and KBr, LiF, NaF, and 2SrF2, and polycrystalline chemical vapor deposited (CVD) ZnSe and ZnS. The measurements were done by the method of Fizeau interferometry over the temperature range -180 to 200/sup 0/ C at the wavelengths 0.6328, 1.15, 3.39 and 10.6 mm. Data are presented for the refractive indices, the linear thermal expansion and dn/dT of Lexan and Plexiglas 55.

Research Organization:
National Bureau of Standards, Washington, D.C. (USA)
OSTI ID:
5069530
Report Number(s):
AD-045095; NBSIR-77-1304
Country of Publication:
United States
Language:
English