BaK4 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.568832 n_e = 1.571249	V_d = 56.06 V_e = 55.78	n_F - n_C = 0.010146 n_F' - n_C' = 0.010240	Coloring: 0.31 - 0.35 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.422011 C2 = -0.0093683029 C3 = 0.013736364 C4 = 0.0003454155 C5 = -0.00001212586 C6 = 0.0000009236992

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.557580
n _s	1.560369
n _r	1.564019
n _C	1.565760
n _C'	1.566248
n _0.6328	1.566704
n _D	1.568742
n _d	1.568832
n _e	1.571249
n _F	1.575907
n _F'	1.576489
n _g	1.581474
n _h	1.586118
n _i	1.594090
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8062
P_C,A'	0.3436
P_d,C	0.3027
P_e,C	0.5409
P_g,d	1.2459
P_g,F	0.5486
P_h,g	0.4576
P_i,g	1.2433
P_C',t	0.8543
P_e,C'	0.4928
P_F',e	0.5163
P_i,F'	1.7346

transmittance: 10 mm
τ_0.31	0.051
τ_0.32	0.27
τ_0.33	0.546
τ_0.34	0.747
τ_0.35	0.867
τ_0.36	0.932
τ_0.37	0.964
τ_0.38	0.975
τ_0.39	0.982
τ_0.4	0.994
τ_0.42	0.995
τ_0.44	0.995
τ_0.46	0.997
τ_0.48	0.997
τ_0.5	0.997
τ_0.55	0.997
τ_0.6	0.997
τ_0.65	0.998
τ_0.7	0.998
τ_0.8	0.998
τ_1.06	0.99
τ_1.5	0.978
τ₂	0.943

transmittance: 25 mm
τ_0.32	0.037
τ_0.33	0.22
τ_0.34	0.483
τ_0.35	0.7
τ_0.36	0.838
τ_0.37	0.913
τ_0.38	0.94
τ_0.39	0.957
τ_0.4	0.985
τ_0.42	0.989
τ_0.44	0.989
τ_0.46	0.992
τ_0.48	0.992
τ_0.5	0.992
τ_0.55	0.992
τ_0.6	0.992
τ_0.65	0.996
τ_0.7	0.996
τ_0.8	0.996
τ_1.06	0.975
τ_1.5	0.947
τ₂	0.864

Poisson coef.: 0.243
Rigidity: 305 Pa*10⁸
Young module: 759 Pa*10⁸
Knoop hardness: 488
Abrasion: 130

Climatic resistance: 1
Resistance to acids: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	85