F4 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.624353 n_e = 1.628472	V_d = 35.92 V_e = 35.66	n_F - n_C = 0.017379 n_F' - n_C' = 0.017620

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.62816 C3 = 0.0340728 C4 = -0.00948768 C5 = 0.0000784861 C6 = -0.000407803 C7 = 0.000317275 C8 = 0.000165606 C9 = 0.00008019 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.588481
n _1.9701	1.593496
n _1.5296	1.599143
n _1.06	1.605957
n _t	1.606847
n _s	1.610806
n _r	1.616441
n _C	1.619253
n _C'	1.620052
n _0.6328	1.620804
n _D	1.624201
n _d	1.624353
n _e	1.628472
n _F	1.636633
n _F'	1.637673
n _g	1.646776
n _h	1.655591
n _i	1.671620
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7138
P_C,A'	0.3198
P_d,C	0.2934
P_e,C	0.5304
P_g,d	1.2901
P_g,F	0.5836
P_h,g	0.5071
P_i,g	1.4295
P_C',t	0.7598
P_e,C'	0.4844
P_F',e	0.5294
P_i,F'	1.9532

Density: 3.67 g/cm³
Poisson coef.: 0.222
Rigidity: 226.2 Pa*10⁸
Young module: 552.7 Pa*10⁸
Optical stress coef.: 2.96 1/Pa*10¹²
Abrasion: 0.6

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	71
20 ~ 120	74
20 ~ 300	77

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-60 ~ 20	F	4.2
-60 ~ 20	e	3.4
-60 ~ 20	D	3
-60 ~ 20	C	2.6
20 ~ 120	F	6.7
20 ~ 120	e	5.6
20 ~ 120	D	5.2
20 ~ 120	C	4.8