STK12 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.692009 n_e = 1.695007	V_d = 55.02 V_e = 54.79	n_F - n_C = 0.012575 n_F' - n_C' = 0.012682

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.68704 C3 = 0.0230322 C4 = -0.0149098 C5 = -0.00144364 C6 = -0.000640047 C7 = 0 C8 = 0 C9 = 0 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.653723
n _1.9701	1.661211
n _1.5296	1.669042
n _1.06	1.676899
n _t	1.677775
n _s	1.681381
n _r	1.686002
n _C	1.688183
n _C'	1.688793
n _0.6328	1.689362
n _D	1.691897
n _d	1.692009
n _e	1.695007
n _F	1.700759
n _F'	1.701476
n _g	1.707599
n _h	1.713271
n _i	1.722896
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8276
P_C,A'	0.3484
P_d,C	0.3042
P_e,C	0.5426
P_g,d	1.2396
P_g,F	0.5438
P_h,g	0.4510
P_i,g	1.2164
P_C',t	0.8761
P_e,C'	0.4941
P_F',e	0.5143
P_i,F'	1.7033

Density: 4.1 g/cm³
Poisson coef.: 0.288
Rigidity: 435.6 Pa*10⁸
Young module: 1122.1 Pa*10⁸
Optical stress coef.: 1.84 1/Pa*10¹²
Abrasion: 1.1

Climatic resistance: а
Resistance to acids: III

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	57
0 ~ 30	61
20 ~ 120	67
20 ~ 300	77

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-60 ~ 20	F	1.8
-60 ~ 20	e	1.5
-60 ~ 20	D	1.3
-60 ~ 20	C	1.2
20 ~ 120	F	3
20 ~ 120	e	2.7
20 ~ 120	D	2.6
20 ~ 120	C	2.4