LaF70 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.749498 n_e = 1.754573	V_d = 35.00 V_e = 34.76	n_F - n_C = 0.021412 n_F' - n_C' = 0.021702	Coloring: 0.34 - 0.41 mkm.

Type: Schott
Spectral range: 0.4046561 - 1.01398 mkm.
C1 = 2.9673854 C2 = -0.012979353 C3 = 0.03058557 C4 = 0.0011409521 C5 = -0.000033672625 C6 = 0.0000069733679

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.727669
n _s	1.732681
n _r	1.739712
n _C	1.743198
n _C'	1.744187
n _0.6328	1.745116
n _D	1.749311
n _d	1.749498
n _e	1.754573
n _F	1.764611
n _F'	1.765889
n _g	1.777076
n _h	1.787911
n _i	-----
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7252
P_C,A'	0.3223
P_d,C	0.2942
P_e,C	0.5311
P_g,d	1.2879
P_g,F	0.5821
P_h,g	0.5060
P_i,g	-----
P_C',t	0.7713
P_e,C'	0.4850
P_F',e	0.5285
P_i,F'	-----

transmittance: 10 mm
τ_0.34	0.013
τ_0.35	0.17
τ_0.36	0.414
τ_0.37	0.619
τ_0.38	0.753
τ_0.39	0.839
τ_0.4	0.894
τ_0.42	0.95
τ_0.44	0.971
τ_0.46	0.978
τ_0.48	0.982
τ_0.5	0.985
τ_0.55	0.988
τ_0.6	0.99
τ_0.65	0.992
τ_0.7	0.995
τ_0.8	0.998
τ_1.06	0.996
τ_1.5	0.985
τ₂	0.98

transmittance: 25 mm
τ_0.35	0.012
τ_0.36	0.11
τ_0.37	0.301
τ_0.38	0.492
τ_0.39	0.646
τ_0.4	0.756
τ_0.42	0.88
τ_0.44	0.93
τ_0.46	0.947
τ_0.48	0.957
τ_0.5	0.964
τ_0.55	0.971
τ_0.6	0.975
τ_0.65	0.982
τ_0.7	0.989
τ_0.8	0.996
τ_1.06	0.992
τ_1.5	0.964
τ₂	0.952

Poisson coef.: 0.268
Rigidity: 305 Pa*10⁸
Young module: 774 Pa*10⁸
Knoop hardness: 473
Abrasion: 150

Climatic resistance: 1
Resistance to acids: 5

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	69