TK21 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.656907 n_e = 1.659965	V_d = 51.13 V_e = 50.83	n_F - n_C = 0.012845 n_F' - n_C' = 0.012982

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.65751 C3 = 0.0242841 C4 = -0.00892793 C5 = -0.00118442 C6 = -0.00013228 C7 = 0.0000761494 C8 = 0 C9 = 0 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.626849
n _1.9701	1.631428
n _1.5296	1.636560
n _1.06	1.642514
n _t	1.643257
n _s	1.646481
n _r	1.650901
n _C	1.653058
n _C'	1.653666
n _0.6328	1.654236
n _D	1.656793
n _d	1.656907
n _e	1.659965
n _F	1.665903
n _F'	1.666649
n _g	1.673064
n _h	1.679081
n _i	1.689480
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7629
P_C,A'	0.3341
P_d,C	0.2996
P_e,C	0.5376
P_g,d	1.2578
P_g,F	0.5574
P_h,g	0.4683
P_i,g	1.2779
P_C',t	0.8102
P_e,C'	0.4903
P_F',e	0.5203
P_i,F'	1.7773

Density: 3.98 g/cm³
Poisson coef.: 0.288
Rigidity: 302 Pa*10⁸
Young module: 778.1 Pa*10⁸
Optical stress coef.: 1.94 1/Pa*10¹²
Abrasion: 0.8

Climatic resistance: А
Resistance to acids: III

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	72
0 ~ 30	75
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	1.7
-60 ~ 20	e	1.2
-60 ~ 20	D	1
-60 ~ 20	C	0.8
20 ~ 120	F	3
20 ~ 120	e	2.5
20 ~ 120	D	2.3
20 ~ 120	C	2.1