TK2 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.572482 n_e = 1.574856	V_d = 57.48 V_e = 57.20	n_F - n_C = 0.009959 n_F' - n_C' = 0.010049

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.57053 C3 = 0.0184097 C4 = -0.00955246 C5 = -0.00115636 C6 = -0.000441888 C7 = 0.000096192 C8 = -0.000167897 C9 = 0 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.545192
n _1.9701	1.550104
n _1.5296	1.555286
n _1.06	1.560800
n _t	1.561447
n _s	1.564166
n _r	1.567750
n _C	1.569463
n _C'	1.569943
n _0.6328	1.570391
n _D	1.572394
n _d	1.572482
n _e	1.574856
n _F	1.579422
n _F'	1.579992
n _g	1.584867
n _h	1.589399
n _i	1.597156
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8048
P_C,A'	0.3442
P_d,C	0.3031
P_e,C	0.5415
P_g,d	1.2435
P_g,F	0.5466
P_h,g	0.4550
P_i,g	1.2339
P_C',t	0.8530
P_e,C'	0.4933
P_F',e	0.5156
P_i,F'	1.7234

Density: 3.2 g/cm³
Poisson coef.: 0.247
Rigidity: 288.8 Pa*10⁸
Young module: 720.3 Pa*10⁸
Optical stress coef.: 2.75 1/Pa*10¹²
Abrasion: 0.8

Climatic resistance: А
Resistance to acids: II

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	64
0 ~ 30	67
20 ~ 120	70
20 ~ 300	76

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	1.1
20 ~ 120	F	3.4
20 ~ 120	e	3
20 ~ 120	D	2.9
20 ~ 120	C	2.7