K-LaFn9 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.763996 n_e = 1.768499	V_d = 40.29 V_e = 40.01	n_F - n_C = 0.018960 n_F' - n_C' = 0.019204	Coloring: 0.35 - 0.41 mkm.

Type: Schott
Spectral range: 0.4046561 - 1.01398 mkm.
C1 = 3.032871 C2 = -0.01386928 C3 = 0.023554889 C4 = 0.0024226145 C5 = -0.00025576787 C6 = 0.000017912149

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.744589
n _s	1.749066
n _r	1.755303
n _C	1.758399
n _C'	1.759277
n _0.6328	1.760102
n _D	1.763830
n _d	1.763996
n _e	1.768499
n _F	1.777359
n _F'	1.778481
n _g	1.788246
n _h	1.797626
n _i	-----
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7283
P_C,A'	0.3230
P_d,C	0.2952
P_e,C	0.5327
P_g,d	1.2789
P_g,F	0.5741
P_h,g	0.4947
P_i,g	-----
P_C',t	0.7746
P_e,C'	0.4863
P_F',e	0.5264
P_i,F'	-----

transmittance: 10 mm
τ_0.35	0.054
τ_0.36	0.34
τ_0.37	0.625
τ_0.38	0.775
τ_0.39	0.86
τ_0.4	0.904
τ_0.42	0.946
τ_0.44	0.96
τ_0.46	0.968
τ_0.48	0.977
τ_0.5	0.982
τ_0.55	0.99
τ_0.6	0.995
τ_0.65	0.995
τ_0.7	0.997
τ_0.8	0.998
τ_1.06	0.998
τ_1.5	0.998
τ₂	0.982

transmittance: 25 mm
τ_0.36	0.067
τ_0.37	0.309
τ_0.38	0.529
τ_0.39	0.686
τ_0.4	0.777
τ_0.42	0.87
τ_0.44	0.903
τ_0.46	0.923
τ_0.48	0.944
τ_0.5	0.957
τ_0.55	0.975
τ_0.6	0.989
τ_0.65	0.989
τ_0.7	0.992
τ_0.8	0.996
τ_1.06	0.996
τ_1.5	0.996
τ₂	0.957

Poisson coef.: 0.274
Rigidity: 374 Pa*10⁸
Young module: 952 Pa*10⁸
Knoop hardness: 539
Abrasion: 140

Climatic resistance: 1
Resistance to acids: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	88