LF7 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.578424 n_e = 1.581762	V_d = 41.12 V_e = 40.84	n_F - n_C = 0.014066 n_F' - n_C' = 0.014243

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.5796 C3 = 0.0271496 C4 = -0.00949371 C5 = -0.000289976 C6 = -0.000343996 C7 = 0.00020407 C8 = 0 C9 = 0 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.546443
n _1.9701	1.551376
n _1.5296	1.556807
n _1.06	1.563050
n _t	1.563832
n _s	1.567235
n _r	1.571944
n _C	1.574261
n _C'	1.574916
n _0.6328	1.575531
n _D	1.578301
n _d	1.578424
n _e	1.581762
n _F	1.588327
n _F'	1.589160
n _g	1.596410
n _h	1.603365
n _i	1.615811
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7413
P_C,A'	0.3267
P_d,C	0.2960
P_e,C	0.5332
P_g,d	1.2786
P_g,F	0.5746
P_h,g	0.4944
P_i,g	1.3792
P_C',t	0.7879
P_e,C'	0.4867
P_F',e	0.5258
P_i,F'	1.8946

Density: 3.23 g/cm³
Poisson coef.: 0.21
Young module: 568 Pa*10⁸
Optical stress coef.: 3.2 1/Pa*10¹²
Abrasion: 0.7

Climatic resistance: Б
Resistance to acids: I

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	71
0 ~ 30	73
20 ~ 120	75
20 ~ 300	79