LaFn7 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.735000 n_e = 1.738535	V_d = 49.49 V_e = 49.25	n_F - n_C = 0.014848 n_F' - n_C' = 0.014994	Coloring: 0.32 - 0.38 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.9456059 C2 = -0.013715367 C3 = 0.02274673 C4 = 0.00038174875 C5 = 0.0000095555244 C6 = 0.00000043726193

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.718720
n _s	1.722708
n _r	1.727988
n _C	1.730521
n _C'	1.731231
n _0.6328	1.731896
n _D	1.734868
n _d	1.735000
n _e	1.738535
n _F	1.745369
n _F'	1.746225
n _g	1.753585
n _h	1.760481
n _i	1.772409
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7947
P_C,A'	0.3409
P_d,C	0.3016
P_e,C	0.5397
P_g,d	1.2516
P_g,F	0.5532
P_h,g	0.4644
P_i,g	1.2677
P_C',t	0.8426
P_e,C'	0.4918
P_F',e	0.5179
P_i,F'	1.7633

transmittance: 10 mm
τ_0.32	0.054
τ_0.33	0.251
τ_0.34	0.482
τ_0.35	0.656
τ_0.36	0.787
τ_0.37	0.868
τ_0.38	0.919
τ_0.39	0.947
τ_0.4	0.961
τ_0.42	0.975
τ_0.44	0.982
τ_0.46	0.985
τ_0.48	0.988
τ_0.5	0.988
τ_0.55	0.994
τ_0.6	0.997
τ_0.65	0.997
τ_0.7	0.998
τ_0.8	0.998
τ_1.06	0.99
τ_1.5	0.985
τ₂	0.953

transmittance: 25 mm
τ_0.33	0.031
τ_0.34	0.161
τ_0.35	0.349
τ_0.36	0.55
τ_0.37	0.702
τ_0.38	0.81
τ_0.39	0.874
τ_0.4	0.906
τ_0.42	0.94
τ_0.44	0.957
τ_0.46	0.964
τ_0.48	0.971
τ_0.5	0.971
τ_0.55	0.985
τ_0.6	0.992
τ_0.65	0.992
τ_0.7	0.996
τ_0.8	0.996
τ_1.06	0.975
τ_1.5	0.964
τ₂	0.887

Poisson coef.: 0.273
Rigidity: 446 Pa*10⁸
Young module: 1135 Pa*10⁸
Knoop hardness: 620
Abrasion: 70

Climatic resistance: 1
Resistance to acids: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	77