STK3 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.659496 n_e = 1.662237	V_d = 57.36 V_e = 57.09	n_F - n_C = 0.011497 n_F' - n_C' = 0.011598

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.65692 C3 = 0.0212087 C4 = -0.0115353 C5 = -0.00140717 C6 = -0.000509635 C7 = 0.000142348 C8 = 0 C9 = 0 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.627351
n _1.9701	1.633218
n _1.5296	1.639436
n _1.06	1.645945
n _t	1.646700
n _s	1.649866
n _r	1.654022
n _C	1.656004
n _C'	1.656560
n _0.6328	1.657079
n _D	1.659393
n _d	1.659496
n _e	1.662237
n _F	1.667502
n _F'	1.668158
n _g	1.673769
n _h	1.678978
n _i	1.687888
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8092
P_C,A'	0.3453
P_d,C	0.3036
P_e,C	0.5420
P_g,d	1.2413
P_g,F	0.5450
P_h,g	0.4531
P_i,g	1.2280
P_C',t	0.8575
P_e,C'	0.4938
P_F',e	0.5149
P_i,F'	1.7160

Density: 3.91 g/cm³
Poisson coef.: 0.283
Rigidity: 344.9 Pa*10⁸
Young module: 884.9 Pa*10⁸
Optical stress coef.: 1.53 1/Pa*10¹²
Abrasion: 0.8

Climatic resistance: А
Resistance to acids: IV

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	71
0 ~ 30	74
20 ~ 120	80
20 ~ 300	88

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-60 ~ 20	F	-1.2
-60 ~ 20	e	-1.5
-60 ~ 20	D	-1.6
-60 ~ 20	C	-1.8
20 ~ 120	F	0.1
20 ~ 120	e	-0.2
20 ~ 120	D	-0.4
20 ~ 120	C	-0.5