FK24 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.581582 n_e = 1.583725	V_d = 64.76 V_e = 64.48	n_F - n_C = 0.008980 n_F' - n_C' = 0.009051

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.57868 C3 = 0.0164086 C4 = -0.0100377 C5 = -0.00121704 C6 = -0.00037569 C7 = 0.000153045 C8 = 0.000157209 C9 = -0.0000758236 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.554942
n _1.9701	1.559966
n _1.5296	1.565313
n _1.06	1.570772
n _t	1.571391
n _s	1.573957
n _r	1.577272
n _C	1.578839
n _C'	1.579277
n _0.6328	1.579685
n _D	1.581502
n _d	1.581582
n _e	1.583725
n _F	1.587820
n _F'	1.588329
n _g	1.592668
n _h	1.596676
n _i	1.603452
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8294
P_C,A'	0.3504
P_d,C	0.3054
P_e,C	0.5440
P_g,d	1.2343
P_g,F	0.5398
P_h,g	0.4463
P_i,g	1.2008
P_C',t	0.8781
P_e,C'	0.4953
P_F',e	0.5126
P_i,F'	1.6840

Density: 3.41 g/cm³
Optical stress coef.: 1.45 1/Pa*10¹²
Abrasion: 0.35

Climatic resistance: д
Resistance to acids: III

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	88
0 ~ 30	92
20 ~ 120	98
20 ~ 300	101