BaK1 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.572498 n_e = 1.574871	V_d = 57.48 V_e = 57.20	n_F - n_C = 0.009958 n_F' - n_C' = 0.010049	Coloring: 0.31 - 0.36 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.4335798 C2 = -0.0088716928 C3 = 0.013827884 C4 = 0.00026757559 C5 = -0.0000041176327 C6 = 0.00000048297313

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.561459
n _s	1.564186
n _r	1.567769
n _C	1.569480
n _C'	1.569960
n _0.6328	1.570408
n _D	1.572409
n _d	1.572498
n _e	1.574871
n _F	1.579439
n _F'	1.580009
n _g	1.584890
n _h	1.589429
n _i	1.597199
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8053
P_C,A'	0.3439
P_d,C	0.3029
P_e,C	0.5413
P_g,d	1.2443
P_g,F	0.5473
P_h,g	0.4558
P_i,g	1.2360
P_C',t	0.8535
P_e,C'	0.4931
P_F',e	0.5159
P_i,F'	1.7261

transmittance: 10 mm
τ_0.29	0.027
τ_0.3	0.17
τ_0.31	0.403
τ_0.32	0.644
τ_0.33	0.806
τ_0.34	0.905
τ_0.35	0.954
τ_0.36	0.971
τ_0.37	0.982
τ_0.38	0.995
τ_0.39	0.997
τ_0.4	0.997
τ_0.42	0.997
τ_0.44	0.997
τ_0.46	0.998
τ_0.48	0.998
τ_0.5	0.998
τ_0.55	0.998
τ_0.6	0.998
τ_0.65	0.998
τ_0.7	0.998
τ_0.8	0.998
τ_1.06	0.995
τ_1.5	0.985
τ₂	0.947

transmittance: 25 mm
τ_0.3	0.012
τ_0.31	0.103
τ_0.32	0.333
τ_0.33	0.583
τ_0.34	0.78
τ_0.35	0.89
τ_0.36	0.93
τ_0.37	0.957
τ_0.38	0.989
τ_0.39	0.992
τ_0.4	0.992
τ_0.42	0.992
τ_0.44	0.992
τ_0.46	0.996
τ_0.48	0.996
τ_0.5	0.996
τ_0.55	0.996
τ_0.6	0.996
τ_0.65	0.996
τ_0.7	0.996
τ_0.8	0.996
τ_1.06	0.989
τ_1.5	0.964
τ₂	0.874

Poisson coef.: 0.249
Rigidity: 304 Pa*10⁸
Young module: 759 Pa*10⁸
Knoop hardness: 561
Abrasion: 140

Climatic resistance: 1
Resistance to acids: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	89