F7 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.623351 n_e = 1.627355	V_d = 36.90 V_e = 36.64	n_F - n_C = 0.016889 n_F' - n_C' = 0.017119

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.62491 C3 = 0.0326792 C4 = -0.0101098 C5 = 0.000358934 C6 = -0.000696702 C7 = 0.00030829 C8 = -0.000575588 C9 = 0.000464064 C10 = 0.000998167 C11 = -0.000600205

Refraction index
n _2.3254	1.587346
n _1.9701	1.592675
n _1.5296	1.598410
n _1.06	1.605299
n _t	1.606193
n _s	1.610125
n _r	1.615645
n _C	1.618387
n _C'	1.619165
n _0.6328	1.619897
n _D	1.623204
n _d	1.623351
n _e	1.627355
n _F	1.635276
n _F'	1.636284
n _g	1.645116
n _h	1.653685
n _i	1.669104
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7220
P_C,A'	0.3212
P_d,C	0.2939
P_e,C	0.5310
P_g,d	1.2886
P_g,F	0.5826
P_h,g	0.5073
P_i,g	1.4203
P_C',t	0.7681
P_e,C'	0.4849
P_F',e	0.5287
P_i,F'	1.9432

Density: 3.63 g/cm³
Poisson coef.: 0.217
Young module: 613 Pa*10⁸
Optical stress coef.: 2.7 1/Pa*10¹²
Abrasion: 0.7

Climatic resistance: А
Resistance to acids: I

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	70
0 ~ 30	72
20 ~ 120	74
20 ~ 300	78