TK8 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.614104 n_e = 1.616758	V_d = 55.13 V_e = 54.84	n_F - n_C = 0.011138 n_F' - n_C' = 0.011245

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.61327 C3 = 0.0207805 C4 = -0.00934468 C5 = -0.00127335 C6 = -0.000352698 C7 = 0.000123759 C8 = 0 C9 = 0 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.585627
n _1.9701	1.590421
n _1.5296	1.595608
n _1.06	1.601299
n _t	1.601984
n _s	1.604911
n _r	1.608843
n _C	1.610741
n _C'	1.611274
n _0.6328	1.611773
n _D	1.614005
n _d	1.614104
n _e	1.616758
n _F	1.621879
n _F'	1.622519
n _g	1.628004
n _h	1.633116
n _i	1.641891
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7861
P_C,A'	0.3401
P_d,C	0.3019
P_e,C	0.5402
P_g,d	1.2479
P_g,F	0.5499
P_h,g	0.4589
P_i,g	1.2467
P_C',t	0.8340
P_e,C'	0.4923
P_F',e	0.5172
P_i,F'	1.7392

Density: 3.61 g/cm³
Poisson coef.: 0.266
Rigidity: 302.2 Pa*10⁸
Young module: 765.4 Pa*10⁸
Optical stress coef.: 2.04 1/Pa*10¹²
Abrasion: 0.7

Climatic resistance: А
Resistance to acids: III

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	62
0 ~ 30	65
20 ~ 120	71
20 ~ 300	79

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-60 ~ 20	F	2.2
-60 ~ 20	e	1.8
-60 ~ 20	D	1.6
-60 ~ 20	C	1.4
20 ~ 120	F	3.4
20 ~ 120	e	3
20 ~ 120	D	2.8
20 ~ 120	C	2.6