BF18 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.560502 n_e = 1.563118	V_d = 50.95 V_e = 50.66	n_F - n_C = 0.010999 n_F' - n_C' = 0.011114

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.56018 C3 = 0.0208091 C4 = -0.00910368 C5 = -0.000998066 C6 = -0.000344829 C7 = -0.0000813071 C8 = 0.000235266 C9 = -0.000154678 C10 = -0.000168111 C11 = 0.000454771

Refraction index
n _2.3254	1.532567
n _1.9701	1.537245
n _1.5296	1.542360
n _1.06	1.547949
n _t	1.548621
n _s	1.551490
n _r	1.555342
n _C	1.557202
n _C'	1.557724
n _0.6328	1.558213
n _D	1.560405
n _d	1.560502
n _e	1.563118
n _F	1.568201
n _F'	1.568839
n _g	1.574331
n _h	1.579476
n _i	1.588563
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7801
P_C,A'	0.3373
P_d,C	0.3000
P_e,C	0.5379
P_g,d	1.2572
P_g,F	0.5573
P_h,g	0.4677
P_i,g	1.2939
P_C',t	0.8276
P_e,C'	0.4904
P_F',e	0.5200
P_i,F'	1.7932

Density: 3.07 g/cm³
Poisson coef.: 0.228
Young module: 671 Pa*10⁸
Optical stress coef.: 3 1/Pa*10¹²
Abrasion: 0.9

Climatic resistance: А
Resistance to acids: I