BaF9 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.643287 n_e = 1.646491	V_d = 47.72 V_e = 47.42	n_F - n_C = 0.013479 n_F' - n_C' = 0.013631	Coloring: 0.34 - 0.38 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.6440649 C2 = -0.0093006126 C3 = 0.019304566 C4 = 0.00041507568 C5 = 0.000001691837 C6 = 0.0000013784268

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.629010
n _s	1.632389
n _r	1.637008
n _C	1.639262
n _C'	1.639897
n _0.6328	1.640493
n _D	1.643168
n _d	1.643287
n _e	1.646491
n _F	1.652741
n _F'	1.653529
n _g	1.660342
n _h	1.666798
n _i	1.678150
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7605
P_C,A'	0.3326
P_d,C	0.2986
P_e,C	0.5363
P_g,d	1.2652
P_g,F	0.5638
P_h,g	0.4789
P_i,g	1.3210
P_C',t	0.8076
P_e,C'	0.4891
P_F',e	0.5220
P_i,F'	1.8264

transmittance: 10 mm
τ_0.32	0.037
τ_0.33	0.299
τ_0.34	0.606
τ_0.35	0.792
τ_0.36	0.883
τ_0.37	0.933
τ_0.38	0.957
τ_0.39	0.968
τ_0.4	0.975
τ_0.42	0.982
τ_0.44	0.988
τ_0.46	0.99
τ_0.48	0.991
τ_0.5	0.994
τ_0.55	0.995
τ_0.6	0.997
τ_0.65	0.997
τ_0.7	0.998
τ_0.8	0.998
τ_1.06	0.991
τ_1.5	0.982
τ₂	0.96

transmittance: 25 mm
τ_0.33	0.049
τ_0.34	0.286
τ_0.35	0.559
τ_0.36	0.733
τ_0.37	0.842
τ_0.38	0.896
τ_0.39	0.923
τ_0.4	0.94
τ_0.42	0.957
τ_0.44	0.971
τ_0.46	0.975
τ_0.48	0.978
τ_0.5	0.985
τ_0.55	0.989
τ_0.6	0.992
τ_0.65	0.992
τ_0.7	0.996
τ_0.8	0.996
τ_1.06	0.978
τ_1.5	0.957
τ₂	0.903

Poisson coef.: 0.267
Rigidity: 314 Pa*10⁸
Young module: 794 Pa*10⁸
Knoop hardness: 507
Abrasion: 170

Climatic resistance: 2
Resistance to acids: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	82