BaF2(CRYSTRAN) Refractive Index

Optical constants (n, k) of BaF2(CRYSTRAN), covering 0.14 – 1.97 μm wavelength range.

Range 0.141 – 1.970 μm
Data Points 31

Optical Constants at Key Wavelengths

632.8 nm (He-Ne)
n = 1.4730
k = 0.0000
589.3 nm (Na-D)
n = 1.4744
k = 0.0000
532 nm
n = 1.4759
k = 0.0000

n, k Dispersion Curves

Data Table (Sampled)

Wavelength (μm)nk
0.14081.815000.00000
0.14521.782000.00000
0.14771.767000.00000
0.15001.678000.00000
0.20001.557000.00000
0.26521.512200.00000
0.28031.506600.00000
0.28931.503900.00000
0.29671.501900.00000
0.30211.500000.00000
0.31301.497800.00000
0.32541.495200.00000
0.34031.492500.00000
0.34661.491500.00000
0.36101.489400.00000
0.36631.488700.00000
0.40461.484400.00000
0.54611.475900.00000
0.58931.474400.00000
0.64381.473000.00000
0.65631.472700.00000
0.70651.471800.00000
0.85211.469900.00000
0.89441.469400.00000
1.01401.468500.00000
1.12871.467800.00000
1.36731.466700.00000
1.52951.466100.00000
1.68101.465600.00000
1.70121.465500.00000
1.97011.464700.00000

Sampled data (31 points total). Click "Download Full CSV" for complete data.

Notes

Barium Fluoride is grown by vacuum Stockbarger technique. Unlike CaF2, BaF2 is not found in the native state and all material must be synthesised chemically making BaF2 relatively expensive to produce. Barium Fluoride cleaves easily and is highly susceptible to thermal shock. It polishes well and can be etched (5). The highest purity Barium Fluoride VUV material can be qualified as fast scintillator grade (6). The highest purity Barium Fluoride VUV material can be qualified as fast scintillator grade (6).

REFERENCES:

(1) Handbook Optical Constants, ed Palik, V3, ISBN 0-12-544423-0

(2) I.H.Malitson; J.Opt.Soc.Am. Vol52, p1377, 1962

(3) D.Girlich; Elastic Constants of BaF2; Phys.Rev. Vol135, p1826, 1964

(4) S.Ballard et al; J.Opt.Soc.Am. Vol42, p684, 1952

(5) US patent. Chemical polish. 4,040,896 1977

(6) M.Laval et al; Nu. Insts.Meth, V206 p169, 1983

References

Crystran Ltd. The Crystran handbook of infra-red and ultra-violet optical materials (5th edition, 2023)
See also Crystran BaF2 online data sheet

Related Materials (Specs)

4786 (NIKON i-line glass) 5165 (NIKON i-line glass) 5742 (NIKON i-line glass) 5859 (NIKON i-line glass) 7054 (NIKON i-line glass) acrylic double matching liquid

Need to measure BaF2(CRYSTRAN) thin film thickness?

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