EKHI

Curve 1

Temperature K: 300 Wavelength Range, μm: 5.94-27.1 Geometry θ' θ'': 8° 8° Composition (weight percent), Specifications, and Remarks: Synthetic n-type crystal, polished and ground; carrier density 8.0 x 10¹⁶ cm⁻³; aluminized mirror reference standard; [Authors' designation: Sample D].

Wavelength / 𝜇m	Reflectance /
5.94	0.331
6.91	0.315
7.91	0.305
8.89	0.292
9.87	0.276
10.8	0.259
11.8	0.239
12.8	0.208
13.9	0.179
15	0.149
15.5	0.129
15.9	0.133
16.2	0.15
16.4	0.16
16.8	0.186
17.8	0.285
18	0.415
20	0.5
20.7	0.585
22.1	0.664
22.9	0.692
23.8	0.7
24.7	0.721
26	0.745
27.1	0.765

Curve 2

Temperature K: 300 Wavelength Range, μm: 5.94-27.5 Geometry θ' θ'': 8° 8° Composition (weight percent), Specifications, and Remarks: Similar to the above specimen and conditions except carrier density 3.1 x 10¹⁸ cm⁻³; [Authors' designation: Sample B].

Wavelength / 𝜇m	Reflectance /
5.04	0.368
5.59	0.365
5.89	0.365
6.96	0.359
7.88	0.354
8.97	0.348
9.95	0.344
10.8	0.333
11.8	0.326
12.9	0.32
13.9	0.313
15	0.3
15.8	0.289
16.8	0.269
17.9	0.251
18.9	0.234
20	0.214
20.8	0.194
22.3	0.166
23	0.163
23.8	0.16
24.8	0.176
26	0.233
27.2	0.317
27.5	0.331

Curve 3

Temperature K: 300 Wavelength Range, μm: 50.0-388 Geometry θ' θ'': 8° 8° Composition (weight percent), Specifications, and Remarks: Synthetic n-type crystal; polished and ground; similar to sample C in electrical characteristics; aluminized mirror reference standard.

Wavelength / 𝜇m	Reflectance /
50	0.868
58	0.908
63	0.923
68	0.925
68	0.948
77	0.945
84	0.93
93	0.93
101	0.932
105	0.927
113	0.92
123	0.911
132	0.915
132	0.876
138	0.882
148	0.877
155	0.871
164	0.868
173	0.843
174	0.863
184	0.836
195	0.844
206	0.836
215	0.836
221	0.823
225	0.814
230	0.8
245	0.779
262	0.748
277	0.719
293	0.678
308	0.638
323	0.589
340	0.52
356	0.459
372	0.4
388	0.35

Curve 4

Temperature K: 300 Wavelength Range, μm: 51.0-324 Geometry θ' θ'': 8° 8° Composition (weight percent), Specifications, and Remarks: Natural n-type crystal; polished and ground; low carrier density; aluminized mirror reference standard.

Wavelength / 𝜇m	Reflectance /
51	0.833
57	0.852
63	0.901
67	0.91
72	0.943
76	0.927
81	0.935
85	0.942
90	0.949
93	0.933
97	0.949
101	0.945
101	0.928
106	0.949
110	0.935
114	0.933
119	0.928
123	0.924
128	0.924
131	0.924
138	0.91
148	0.903
156	0.912
164	0.898
170	0.885
174	0.86
179	0.833
185	0.8
190	0.771
195	0.727
200	0.674
206	0.588
210	0.483
215	0.343
220	0.23
226	0.158
229	0.138
246	0.15
261	0.198
278	0.237
294	0.262
308	0.282
324	0.3

Erratum: Optical dispersion of lead sulfide in the infrared (Physical Review (1966) 147, 2 (670))