STK15 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.709315 n_e = 1.712403	V_d = 54.75 V_e = 54.54	n_F - n_C = 0.012953 n_F' - n_C' = 0.013061

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.70473 C3 = 0.0237313 C4 = -0.0148177 C5 = -0.00150237 C6 = -0.000675942 C7 = 0.000206911 C8 = 0 C9 = 0 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.670501
n _1.9701	1.677981
n _1.5296	1.685817
n _1.06	1.693759
n _t	1.694655
n _s	1.698354
n _r	1.703118
n _C	1.705369
n _C'	1.705998
n _0.6328	1.706585
n _D	1.709199
n _d	1.709315
n _e	1.712403
n _F	1.718322
n _F'	1.719060
n _g	1.725365
n _h	1.731230
n _i	1.741306
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8271
P_C,A'	0.3489
P_d,C	0.3046
P_e,C	0.5430
P_g,d	1.2391
P_g,F	0.5437
P_h,g	0.4527
P_i,g	1.2306
P_C',t	0.8757
P_e,C'	0.4944
P_F',e	0.5138
P_i,F'	1.7174

Density: 3.77 g/cm³
Optical stress coef.: 1.7 1/Pa*10¹²
Abrasion: 1.07

Climatic resistance: у
Resistance to acids: IV

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	56
0 ~ 30	59
20 ~ 120	64
20 ~ 300	71