FK11 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.519973 n_e = 1.521765	V_d = 69.16 V_e = 68.93	n_F - n_C = 0.007518 n_F' - n_C' = 0.007569

Type: Resnik
Spectral range: 0.40466 - 2.1 mkm.
C1 = 0.028 C2 = 1.51784 C3 = 0.0112125 C4 = -0.00616056 C5 = -0.00106862 C6 = -0.000573447 C7 = 0.000524087 C8 = 0.00069046 C9 = -0.000576622 C10 = -0.000611714 C11 = 0.000280235

Refraction index
n _2.3254	-----
n _1.9701	1.499488
n _1.5296	1.505063
n _1.06	1.510495
n _t	1.511073
n _s	1.513408
n _r	1.516315
n _C	1.517657
n _C'	1.518029
n _0.6328	1.518375
n _D	1.519905
n _d	1.519973
n _e	1.521765
n _F	1.525175
n _F'	1.525598
n _g	1.529190
n _h	-----
n _i	-----
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8757
P_C,A'	0.3610
P_d,C	0.3080
P_e,C	0.5464
P_g,d	1.2259
P_g,F	0.5340
P_h,g	-----
P_i,g	-----
P_C',t	0.9251
P_e,C'	0.4970
P_F',e	0.5097
P_i,F'	-----

Density: 2.6 g/cm³
Optical stress coef.: 2.35 1/Pa*10¹²
Abrasion: 0.45

Climatic resistance: У
Resistance to acids: I

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	78
0 ~ 30	82
20 ~ 120	89
20 ~ 300	100