STK7 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.687013 n_e = 1.690068	V_d = 53.60 V_e = 53.32	n_F - n_C = 0.012816 n_F' - n_C' = 0.012941

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.68636 C3 = 0.0239627 C4 = -0.0105878 C5 = -0.00147877 C6 = -0.00055739 C7 = 0.000125463 C8 = 0 C9 = 0 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.654549
n _1.9701	1.660041
n _1.5296	1.665918
n _1.06	1.672353
n _t	1.673131
n _s	1.676466
n _r	1.680969
n _C	1.683147
n _C'	1.683760
n _0.6328	1.684333
n _D	1.686899
n _d	1.687013
n _e	1.690068
n _F	1.695964
n _F'	1.696701
n _g	1.703019
n _h	1.708905
n _i	1.718998
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7814
P_C,A'	0.3390
P_d,C	0.3016
P_e,C	0.5399
P_g,d	1.2488
P_g,F	0.5504
P_h,g	0.4592
P_i,g	1.2467
P_C',t	0.8292
P_e,C'	0.4921
P_F',e	0.5175
P_i,F'	1.7396

Density: 4.22 g/cm³
Poisson coef.: 0.291
Rigidity: 315.4 Pa*10⁸
Young module: 814.4 Pa*10⁸
Optical stress coef.: 1.38 1/Pa*10¹²
Abrasion: 0.5

Climatic resistance: У
Resistance to acids: IV

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	84
0 ~ 30	88
20 ~ 120	94
20 ~ 300	104

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-60 ~ 20	F	-3.4
-60 ~ 20	e	-3.7
-60 ~ 20	D	-3.8
-60 ~ 20	C	-4
20 ~ 120	F	-1.8
20 ~ 120	e	-2.1
20 ~ 120	D	-2.2
20 ~ 120	C	-2.4