LaFn5 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.742998 n_e = 1.746592	V_d = 49.21 V_e = 48.95	n_F - n_C = 0.015096 n_F' - n_C' = 0.015249	Coloring: 0.31 - 0.38 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.9698108 C2 = -0.011756836 C3 = 0.024173933 C4 = 0.00016142985 C5 = 0.000041208778 C6 = -0.0000012231213

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.726680
n _s	1.730600
n _r	1.735894
n _C	1.738454
n _C'	1.739174
n _0.6328	1.739848
n _D	1.742865
n _d	1.742998
n _e	1.746592
n _F	1.753551
n _F'	1.754424
n _g	1.761927
n _h	1.768960
n _i	1.781100
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7799
P_C,A'	0.3383
P_d,C	0.3009
P_e,C	0.5390
P_g,d	1.2538
P_g,F	0.5547
P_h,g	0.4658
P_i,g	1.2699
P_C',t	0.8276
P_e,C'	0.4913
P_F',e	0.5187
P_i,F'	1.7669

transmittance: 10 mm
τ_0.31	0.042
τ_0.32	0.227
τ_0.33	0.447
τ_0.34	0.619
τ_0.35	0.757
τ_0.36	0.843
τ_0.37	0.908
τ_0.38	0.939
τ_0.39	0.957
τ_0.4	0.968
τ_0.42	0.975
τ_0.44	0.981
τ_0.46	0.982
τ_0.48	0.985
τ_0.5	0.988
τ_0.55	0.99
τ_0.6	0.99
τ_0.65	0.994
τ_0.7	0.995
τ_0.8	0.998
τ_1.06	0.998
τ_1.5	0.998
τ₂	0.982

transmittance: 25 mm
τ_0.32	0.024
τ_0.33	0.134
τ_0.34	0.301
τ_0.35	0.498
τ_0.36	0.654
τ_0.37	0.786
τ_0.38	0.854
τ_0.39	0.896
τ_0.4	0.923
τ_0.42	0.94
τ_0.44	0.954
τ_0.46	0.957
τ_0.48	0.964
τ_0.5	0.971
τ_0.55	0.975
τ_0.6	0.975
τ_0.65	0.985
τ_0.7	0.989
τ_0.8	0.996
τ_1.06	0.996
τ_1.5	0.996
τ₂	0.957

Poisson coef.: 0.292
Rigidity: 399 Pa*10⁸
Young module: 1030 Pa*10⁸
Knoop hardness: 601
Abrasion: 110

Climatic resistance: 1
Resistance to acids: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	67