STK9 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.742532 n_e = 1.746051	V_d = 50.26 V_e = 50.03	n_F - n_C = 0.014772 n_F' - n_C' = 0.014910

Type: Resnik
Spectral range: 0.365 - 2.6 mkm.
C1 = 0.028 C2 = 1.74046 C3 = 0.0276887 C4 = -0.0145616 C5 = -0.00167434 C6 = -0.000283049 C7 = 0.000480332 C8 = 0.000466251 C9 = -0.000372971 C10 = -0.00101211 C11 = 0

Refraction index
n _2.3254	1.701770
n _1.9701	1.709132
n _1.5296	1.717090
n _1.06	1.725323
n _t	1.726269
n _s	1.730250
n _r	1.735529
n _C	1.738061
n _C'	1.738771
n _0.6328	1.739435
n _D	1.742401
n _d	1.742532
n _e	1.746051
n _F	1.752834
n _F'	1.753682
n _g	1.760965
n _h	1.767771
n _i	1.779376
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7982
P_C,A'	0.3427
P_d,C	0.3026
P_e,C	0.5408
P_g,d	1.2477
P_g,F	0.5504
P_h,g	0.4607
P_i,g	1.2463
P_C',t	0.8463
P_e,C'	0.4928
P_F',e	0.5165
P_i,F'	1.7393

Density: 4.11 g/cm³
Poisson coef.: 0.298
Rigidity: 446.2 Pa*10⁸
Young module: 1158.4 Pa*10⁸
Optical stress coef.: 1.94 1/Pa*10¹²
Abrasion: 1.5

Climatic resistance: а
Resistance to acids: III

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	51
0 ~ 30	53
20 ~ 120	57
20 ~ 300	64

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-60 ~ 20	F	4.4
-60 ~ 20	e	3.9
-60 ~ 20	D	3.7
-60 ~ 20	C	3.5
20 ~ 120	F	6.3
20 ~ 120	e	5.9
20 ~ 120	D	5.6
20 ~ 120	C	5.5