BF6 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.569704 n_e = 1.572443	V_d = 49.46 V_e = 49.16	n_F - n_C = 0.011518 n_F' - n_C' = 0.011643

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.56976 C3 = 0.0218249 C4 = -0.00880378 C5 = -0.000856461 C6 = -0.000422619 C7 = 0.000175395 C8 = 0 C9 = 0 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.541737
n _1.9701	1.546311
n _1.5296	1.551253
n _1.06	1.556763
n _t	1.557439
n _s	1.560352
n _r	1.564322
n _C	1.566256
n _C'	1.566800
n _0.6328	1.567311
n _D	1.569602
n _d	1.569704
n _e	1.572443
n _F	1.577774
n _F'	1.578444
n _g	1.584232
n _h	1.589700
n _i	1.599283
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7654
P_C,A'	0.3341
P_d,C	0.2993
P_e,C	0.5372
P_g,d	1.2613
P_g,F	0.5607
P_h,g	0.4746
P_i,g	1.3067
P_C',t	0.8127
P_e,C'	0.4899
P_F',e	0.5209
P_i,F'	1.8092

Density: 3.16 g/cm³
Poisson coef.: 0.243
Rigidity: 260.2 Pa*10⁸
Young module: 646.8 Pa*10⁸
Optical stress coef.: 3.06 1/Pa*10¹²
Abrasion: 0.6

Climatic resistance: А
Resistance to acids: I

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	77
0 ~ 30	79
20 ~ 120	84
20 ~ 300	92

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-60 ~ 20	F	1.1
-60 ~ 20	e	0.6
-60 ~ 20	D	0.4
-60 ~ 20	C	0.3
20 ~ 120	F	2.8
20 ~ 120	e	2.3
20 ~ 120	D	2
20 ~ 120	C	1.8