LaFn4 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.719997 n_e = 1.723911	V_d = 43.68 V_e = 43.40	n_F - n_C = 0.016480 n_F' - n_C' = 0.016678	Coloring: 0.35 - 0.40 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.8855729 C2 = -0.010279711 C3 = 0.024792351 C4 = 0.00049314273 C5 = 0.00001139152 C6 = 0.0000019559762

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.702819
n _s	1.706817
n _r	1.712370
n _C	1.715099
n _C'	1.715871
n _0.6328	1.716595
n _D	1.719852
n _d	1.719997
n _e	1.723911
n _F	1.731580
n _F'	1.732550
n _g	1.740968
n _h	1.749000
n _i	1.763259
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7450
P_C,A'	0.3288
P_d,C	0.2971
P_e,C	0.5346
P_g,d	1.2724
P_g,F	0.5696
P_h,g	0.4873
P_i,g	1.3525
P_C',t	0.7919
P_e,C'	0.4878
P_F',e	0.5241
P_i,F'	1.8633

transmittance: 10 mm
τ_0.35	0.066
τ_0.36	0.371
τ_0.37	0.65
τ_0.38	0.81
τ_0.39	0.891
τ_0.4	0.933
τ_0.42	0.96
τ_0.44	0.971
τ_0.46	0.977
τ_0.48	0.982
τ_0.5	0.985
τ_0.55	0.99
τ_0.6	0.991
τ_0.65	0.995
τ_0.7	0.997
τ_0.8	0.998
τ_1.06	0.998
τ_1.5	0.995
τ₂	0.974

transmittance: 25 mm
τ_0.36	0.084
τ_0.37	0.341
τ_0.38	0.59
τ_0.39	0.751
τ_0.4	0.842
τ_0.42	0.903
τ_0.44	0.93
τ_0.46	0.944
τ_0.48	0.957
τ_0.5	0.964
τ_0.55	0.975
τ_0.6	0.978
τ_0.65	0.989
τ_0.7	0.992
τ_0.8	0.996
τ_1.06	0.996
τ_1.5	0.989
τ₂	0.937

Poisson coef.: 0.269
Rigidity: 364 Pa*10⁸
Young module: 924 Pa*10⁸
Knoop hardness: 531
Abrasion: 170

Climatic resistance: 1
Resistance to acids: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	90