BF4 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.548083 n_e = 1.550501	V_d = 53.95 V_e = 53.66	n_F - n_C = 0.010157 n_F' - n_C' = 0.010257

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.54564 C3 = 0.0188893 C4 = -0.0100052 C5 = -0.000867884 C6 = -0.000242646 C7 = -0.0000104678 C8 = -0.000193229 C9 = 0.0000993165 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.520107
n _1.9701	1.525154
n _1.5296	1.530540
n _1.06	1.536246
n _t	1.536907
n _s	1.539669
n _r	1.543289
n _C	1.545021
n _C'	1.545507
n _0.6328	1.545961
n _D	1.547993
n _d	1.548083
n _e	1.550501
n _F	1.555178
n _F'	1.555764
n _g	1.560799
n _h	1.565515
n _i	1.573704
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7988
P_C,A'	0.3410
P_d,C	0.3014
P_e,C	0.5395
P_g,d	1.2518
P_g,F	0.5533
P_h,g	0.4643
P_i,g	1.2705
P_C',t	0.8466
P_e,C'	0.4917
P_F',e	0.5181
P_i,F'	1.7661

Density: 2.92 g/cm³
Poisson coef.: 0.223
Young module: 686 Pa*10⁸
Optical stress coef.: 2.75 1/Pa*10¹²
Abrasion: 0.8

Climatic resistance: А
Resistance to acids: I

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	69
0 ~ 30	71
20 ~ 120	74
20 ~ 300	80