TK4 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.611198 n_e = 1.613808	V_d = 55.81 V_e = 55.52	n_F - n_C = 0.010951 n_F' - n_C' = 0.011054

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.60985 C3 = 0.0202855 C4 = -0.0094776 C5 = -0.00114378 C6 = -0.000845889 C7 = 0.000000557438 C8 = -0.000100749 C9 = 0.000000207728 C10 = 0.000703576 C11 = 0

Refraction index
n _2.3254	1.582760
n _1.9701	1.587697
n _1.5296	1.592871
n _1.06	1.598511
n _t	1.599197
n _s	1.602118
n _r	1.606016
n _C	1.607888
n _C'	1.608413
n _0.6328	1.608905
n _D	1.611101
n _d	1.611198
n _e	1.613808
n _F	1.618839
n _F'	1.619468
n _g	1.624856
n _h	1.629869
n _i	1.638427
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7936
P_C,A'	0.3417
P_d,C	0.3022
P_e,C	0.5405
P_g,d	1.2471
P_g,F	0.5493
P_h,g	0.4577
P_i,g	1.2392
P_C',t	0.8416
P_e,C'	0.4925
P_F',e	0.5168
P_i,F'	1.7312

Density: 3.58 g/cm³
Poisson coef.: 0.259
Rigidity: 308.2 Pa*10⁸
Young module: 776.2 Pa*10⁸
Optical stress coef.: 2.24 1/Pa*10¹²
Abrasion: 0.6

Climatic resistance: А
Resistance to acids: III

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	58
0 ~ 30	61
20 ~ 120	66
20 ~ 300	73

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-60 ~ 20	F	2.5
-60 ~ 20	e	2.2
-60 ~ 20	D	2
-60 ~ 20	C	1.9
20 ~ 120	F	4.1
20 ~ 120	e	3.7
20 ~ 120	D	3.6
20 ~ 120	C	3.4