STK8 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.703129 n_e = 1.706497	V_d = 49.68 V_e = 49.40	n_F - n_C = 0.014151 n_F' - n_C' = 0.014299

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.70368 C3 = 0.0268024 C4 = -0.0107294 C5 = -0.0012433 C6 = -0.000421956 C7 = 0.000376175 C8 = 0.000552735 C9 = -0.000284096 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.668842
n _1.9701	1.674306
n _1.5296	1.680392
n _1.06	1.687151
n _t	1.687982
n _s	1.691577
n _r	1.696490
n _C	1.698879
n _C'	1.699552
n _0.6328	1.700182
n _D	1.703004
n _d	1.703129
n _e	1.706497
n _F	1.713030
n _F'	1.713851
n _g	1.720927
n _h	1.727588
n _i	1.739084
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7700
P_C,A'	0.3363
P_d,C	0.3003
P_e,C	0.5382
P_g,d	1.2577
P_g,F	0.5580
P_h,g	0.4707
P_i,g	1.2830
P_C',t	0.8175
P_e,C'	0.4907
P_F',e	0.5197
P_i,F'	1.7831

Density: 4.16 g/cm³
Poisson coef.: 0.294
Young module: 858 Pa*10⁸
Optical stress coef.: 1.45 1/Pa*10¹²
Abrasion: 0.5

Climatic resistance: а
Resistance to acids: IV

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	84
0 ~ 30	87
20 ~ 120	92
20 ~ 300	100