K2 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.500470 n_e = 1.502279	V_d = 66.03 V_e = 65.83	n_F - n_C = 0.007579 n_F' - n_C' = 0.007628

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.49557 C3 = 0.0135876 C4 = -0.0114316 C5 = -0.0010233 C6 = -0.000617158 C7 = 0.000216722 C8 = 0.000309625 C9 = -0.000159142 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.473800
n _1.9701	1.479473
n _1.5296	1.485340
n _1.06	1.490886
n _t	1.491475
n _s	1.493845
n _r	1.496777
n _C	1.498131
n _C'	1.498507
n _0.6328	1.498856
n _D	1.500402
n _d	1.500470
n _e	1.502279
n _F	1.505710
n _F'	1.506135
n _g	1.509753
n _h	1.513090
n _i	1.518695
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8781
P_C,A'	0.3611
P_d,C	0.3086
P_e,C	0.5472
P_g,d	1.2247
P_g,F	0.5334
P_h,g	0.4401
P_i,g	1.1798
P_C',t	0.9276
P_e,C'	0.4977
P_F',e	0.5088
P_i,F'	1.6571

Density: 2.38 g/cm³
Poisson coef.: 0.208
Young module: 716 Pa*10⁸
Optical stress coef.: 3.2 1/Pa*10¹²
Abrasion: 1

Climatic resistance: А
Resistance to acids: I

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	57
0 ~ 30	60
20 ~ 120	64
20 ~ 300	71