BF16 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.671022 n_e = 1.674393	V_d = 47.29 V_e = 46.99	n_F - n_C = 0.014188 n_F' - n_C' = 0.014349

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.67254 C3 = 0.027014 C4 = -0.00910762 C5 = -0.000922758 C6 = -0.00089704 C7 = -0.000129825 C8 = -0.0000876497 C9 = -0.000178418 C10 = 0.000591933 C11 = 0.000496341

Refraction index
n _2.3254	1.638661
n _1.9701	1.643595
n _1.5296	1.648911
n _1.06	1.655196
n _t	1.656006
n _s	1.659547
n _r	1.664415
n _C	1.666788
n _C'	1.667456
n _0.6328	1.668083
n _D	1.670897
n _d	1.671022
n _e	1.674393
n _F	1.680976
n _F'	1.681806
n _g	1.688972
n _h	1.695729
n _i	1.707707
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7598
P_C,A'	0.3328
P_d,C	0.2984
P_e,C	0.5360
P_g,d	1.2651
P_g,F	0.5635
P_h,g	0.4762
P_i,g	1.3204
P_C',t	0.8070
P_e,C'	0.4889
P_F',e	0.5224
P_i,F'	1.8255

Density: 4.02 g/cm³
Poisson coef.: 0.286
Rigidity: 306.7 Pa*10⁸
Young module: 788.9 Pa*10⁸
Optical stress coef.: 1.63 1/Pa*10¹²
Abrasion: 0.5

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	84
20 ~ 300	90

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-60 ~ 20	F	1.2
-60 ~ 20	e	0.6
-60 ~ 20	D	0.5
-60 ~ 20	C	0.1
20 ~ 120	F	3
20 ~ 120	e	2.4
20 ~ 120	D	2.2
20 ~ 120	C	1.9