LaFn8 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.756000 n_e = 1.759783	V_d = 47.57 V_e = 47.32	n_F - n_C = 0.015892 n_F' - n_C' = 0.016053	Coloring: 0.32 - 0.39 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 3.0092316 C2 = -0.011074297 C3 = 0.026677749 C4 = -0.000089651881 C5 = 0.000072619355 C6 = -0.0000022455275

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.738899
n _s	1.742969
n _r	1.748523
n _C	1.751217
n _C'	1.751975
n _0.6328	1.752684
n _D	1.755859
n _d	1.756000
n _e	1.759783
n _F	1.767109
n _F'	1.768028
n _g	1.775938
n _h	1.783371
n _i	1.796249
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7751
P_C,A'	0.3379
P_d,C	0.3009
P_e,C	0.5390
P_g,d	1.2546
P_g,F	0.5555
P_h,g	0.4676
P_i,g	1.2780
P_C',t	0.8227
P_e,C'	0.4913
P_F',e	0.5187
P_i,F'	1.7758

transmittance: 10 mm
τ_0.32	0.029
τ_0.33	0.192
τ_0.34	0.425
τ_0.35	0.625
τ_0.36	0.763
τ_0.37	0.86
τ_0.38	0.919
τ_0.39	0.95
τ_0.4	0.965
τ_0.42	0.982
τ_0.44	0.988
τ_0.46	0.99
τ_0.48	0.995
τ_0.5	0.995
τ_0.55	0.997
τ_0.6	0.997
τ_0.65	0.997
τ_0.7	0.998
τ_0.8	0.998
τ_1.06	0.971
τ_1.5	0.968
τ₂	0.946

transmittance: 25 mm
τ_0.33	0.016
τ_0.34	0.118
τ_0.35	0.309
τ_0.36	0.509
τ_0.37	0.686
τ_0.38	0.81
τ_0.39	0.88
τ_0.4	0.916
τ_0.42	0.957
τ_0.44	0.971
τ_0.46	0.975
τ_0.48	0.989
τ_0.5	0.989
τ_0.55	0.992
τ_0.6	0.992
τ_0.65	0.992
τ_0.7	0.996
τ_0.8	0.996
τ_1.06	0.93
τ_1.5	0.923
τ₂	0.87

Poisson coef.: 0.279
Rigidity: 437 Pa*10⁸
Young module: 1118 Pa*10⁸
Knoop hardness: 590
Abrasion: 80

Climatic resistance: 1
Resistance to acids: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	84