F18 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.624957 n_e = 1.629151	V_d = 35.29 V_e = 35.02	n_F - n_C = 0.017709 n_F' - n_C' = 0.017962

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.62941 C3 = 0.0348429 C4 = -0.00861351 C5 = 0.000281345 C6 = -0.000176131 C7 = 0.000229717 C8 = -0.0000942035 C9 = 0.000156746 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.589871
n _1.9701	1.594457
n _1.5296	1.599724
n _1.06	1.606384
n _t	1.607271
n _s	1.611241
n _r	1.616927
n _C	1.619776
n _C'	1.620587
n _0.6328	1.621350
n _D	1.624802
n _d	1.624957
n _e	1.629151
n _F	1.637486
n _F'	1.638549
n _g	1.647875
n _h	1.656926
n _i	1.673449
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7061
P_C,A'	0.3175
P_d,C	0.2925
P_e,C	0.5293
P_g,d	1.2941
P_g,F	0.5866
P_h,g	0.5110
P_i,g	1.4441
P_C',t	0.7519
P_e,C'	0.4835
P_F',e	0.5306
P_i,F'	1.9707

Density: 3.59 g/cm³
Optical stress coef.: 2.75 1/Pa*10¹²
Abrasion: 0.6

Climatic resistance: В
Resistance to acids: V

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	106
0 ~ 30	109
20 ~ 120	114
20 ~ 300	122