LF9 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.580135 n_e = 1.583751	V_d = 38.00 V_e = 37.72	n_F - n_C = 0.015265 n_F' - n_C' = 0.015475

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.58087 C3 = 0.0297501 C4 = -0.0107238 C5 = 0.000417038 C6 = -0.000194379 C7 = 0.00040151 C8 = -0.000000906156 C9 = 0.000407106 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.545355
n _1.9701	1.550809
n _1.5296	1.556839
n _1.06	1.563660
n _t	1.564500
n _s	1.568140
n _r	1.573168
n _C	1.575651
n _C'	1.576354
n _0.6328	1.577016
n _D	1.580002
n _d	1.580135
n _e	1.583751
n _F	1.590916
n _F'	1.591830
n _g	1.599851
n _h	1.607690
n _i	1.622373
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7304
P_C,A'	0.3222
P_d,C	0.2937
P_e,C	0.5306
P_g,d	1.2915
P_g,F	0.5852
P_h,g	0.5135
P_i,g	1.4754
P_C',t	0.7765
P_e,C'	0.4845
P_F',e	0.5292
P_i,F'	2.0008

Density: 2.61 g/cm³
Poisson coef.: 0.244
Rigidity: 271.4 Pa*10⁸
Young module: 675.2 Pa*10⁸
Optical stress coef.: 3.26 1/Pa*10¹²

Climatic resistance: А
Resistance to acids: I

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	81
0 ~ 30	85
20 ~ 120	90
20 ~ 300	98

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-60 ~ 20	F	-0.6
-60 ~ 20	e	-1.1
-60 ~ 20	D	-1.4
-60 ~ 20	C	-1.6
20 ~ 120	F	1.1
20 ~ 120	e	0.5
20 ~ 120	D	0.2
20 ~ 120	C	-0.1