TF4 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.740019 n_e = 1.746226	V_d = 28.16 V_e = 27.94	n_F - n_C = 0.026278 n_F' - n_C' = 0.026704

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.75021 C3 = 0.0528305 C4 = -0.009042 C5 = 0.00193951 C6 = -0.000130033 C7 = 0.000515575 C8 = -0.000163187 C9 = 0.000197216 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.693967
n _1.9701	1.698992
n _1.5296	1.705037
n _1.06	1.713495
n _t	1.714693
n _s	1.720187
n _r	1.728300
n _C	1.732431
n _C'	1.733612
n _0.6328	1.734725
n _D	1.739792
n _d	1.740019
n _e	1.746226
n _F	1.758709
n _F'	1.760316
n _g	1.774539
n _h	1.788574
n _i	1.814764
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6750
P_C,A'	0.3088
P_d,C	0.2887
P_e,C	0.5249
P_g,d	1.3136
P_g,F	0.6024
P_h,g	0.5340
P_i,g	1.5307
P_C',t	0.7199
P_e,C'	0.4800
P_F',e	0.5361
P_i,F'	2.0719

Density: 4.65 g/cm³
Poisson coef.: 0.24
Rigidity: 217.4 Pa*10⁸
Young module: 539 Pa*10⁸
Optical stress coef.: 1.48 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	78
0 ~ 30	80
20 ~ 120	83
20 ~ 300	87

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-60 ~ 20	F	7.4
-60 ~ 20	e	5.9
-60 ~ 20	D	5.1
-60 ~ 20	C	4.4
20 ~ 120	F	10.2
20 ~ 120	e	8.4
20 ~ 120	D	7.5
20 ~ 120	C	6.7