EKHI

Curve 1

Temperature K: 562 Wavelength Range, µm: 6.6-19.3 Geometry θ θ': 0° Composition (weight percent), Specifications, and Remarks: Single crystal (3.00 mm thick) from Semi-Element Inc.; polished; data extracted from smooth curve.

Wavelength / 𝜇m	Emittance /
6.6	0.156
7.28	0.16
7.75	0.204
8.18	0.258
8.66	0.352
9.35	0.604
9.84	0.703
10.6	0.879
12.3	0.957
19.3	0.97

Curve 2

Temperature K: 562 Wavelength Range, µm: 6.42-19.3 Geometry θ θ': 0° Composition (weight percent), Specifications, and Remarks: Similar to the above specimen and conditions except 1.50 mm thick.

Wavelength / 𝜇m	Emittance /
6.42	0.122
7.8	0.122
8.21	0.16
8.75	0.257
9.29	0.354
9.93	0.504
11.3	0.874
12.3	0.944
19.3	0.972

Curve 3

Temperature K: 562 Wavelength Range, µm: 6.42-19.3 Geometry θ θ': 0° Composition (weight percent), Specifications, and Remarks: Similar to the above specimen and conditions except 0.50 mm thick.

Wavelength / 𝜇m	Emittance /
6.42	0.122
7.84	0.122
8.47	0.147
9.24	0.222
10.0	0.311
10.6	0.474
12.3	0.84
13.2	0.948
19.3	0.97

Curve 4

Temperature K: 562 Wavelength Range, µm: 6.42-25.0 Geometry θ θ': 0° Composition (weight percent), Specifications, and Remarks: Similar to the above specimen and conditions except 0.20 mm thick.

Wavelength / 𝜇m	Emittance /
6.42	0.122
8.1	0.122
8.3	0.146
8.73	0.156
9.32	0.232
9.8	0.206
10.3	0.225
11.2	0.316
12.2	0.49
13.7	0.794
14.5	0.863
15.6	0.886
16.1	0.938
17.2	0.964
19.3	0.97
21.4	0.922
22.0	0.793
25.0	0.701

Spectral Emissivity of Calcium Fluoride