EKHI

Materials

Curve 1

Temperature K: 296 Wavelength Range, μm: 18.0-196 Geometry θ' θ'': ~0°-0° Composition (weight percent), Specifications, and Remarks: Single crystal.

Wavelength / 𝜇m	Reflectance /
18.0	0.345
23.0	0.293
30.0	0.214
35.0	0.155
40.0	0.134
42.0	0.162
45.0	0.406
46.0	0.39
47.0	0.446
47.0	0.464
48.0	0.495
49.0	0.596
54.0	0.756
59.0	0.828
66.0	0.837
76.0	0.837
85.0	0.809
91.0	0.776
97.0	0.756
107	0.782
116	0.797
124	0.802
134	0.808
145	0.793
157	0.782
172	0.748
183	0.735
196	0.739

Curve 2

Temperature K: 403 Wavelength Range, μm: 48.0-196 Geometry θ' θ'': ~0°-0° Composition (weight percent), Specifications, and Remarks: Single crystal.

Wavelength / 𝜇m	Reflectance /
48.0	0.441
48.0	0.466
48.0	0.49
49.0	0.518
54.0	0.686
59.0	0.748
66.0	0.765
75.0	0.763
85.0	0.729
91.0	0.713
97.0	0.688
107	0.727
117	0.752
125	0.762
134	0.757
145	0.744
158	0.718
172	0.681
184	0.66
196	0.66

Curve 1

Temperature K: 296 Wavelength Range, μm: 21.0-208 Geometry θ' θ'': ~0°-0° Composition (weight percent), Specifications, and Remarks: LEAD SELENIDE, PbSe; single crystal.

Wavelength / 𝜇m	Reflectance /
21.0	0.341
22.0	0.302
27.0	0.278
32.0	0.232
37.0	0.178
45.0	0.118
52.0	0.264
54.0	0.419
61.0	0.513
65.0	0.542
73.0	0.657
82.0	0.674
88.0	0.651
99.0	0.628
107	0.654
122	0.663
133	0.651
143	0.644
152	0.616
158	0.635
171	0.63
183	0.636
195	0.633
202	0.633
208	0.612

Reflectivity of several crystals in the far infrared region between 20 and 200 microns