KF4 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.518180 n_e = 1.520275	V_d = 58.96 V_e = 58.73	n_F - n_C = 0.008787 n_F' - n_C' = 0.008858

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.51418 C3 = 0.0160142 C4 = -0.0110274 C5 = -0.000997924 C6 = -0.000523868 C7 = 0.000121283 C8 = 0 C9 = 0 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.490483
n _1.9701	1.496026
n _1.5296	1.501783
n _1.06	1.507486
n _t	1.508116
n _s	1.510691
n _r	1.513962
n _C	1.515497
n _C'	1.515925
n _0.6328	1.516325
n _D	1.518101
n _d	1.518180
n _e	1.520275
n _F	1.524285
n _F'	1.524784
n _g	1.529051
n _h	1.533016
n _i	1.539820
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8399
P_C,A'	0.3514
P_d,C	0.3052
P_e,C	0.5436
P_g,d	1.2371
P_g,F	0.5423
P_h,g	0.4512
P_i,g	1.2254
P_C',t	0.8886
P_e,C'	0.4949
P_F',e	0.5131
P_i,F'	1.7110

Density: 2.57 g/cm³
Poisson coef.: 0.212
Rigidity: 290.3 Pa*10⁸
Young module: 703.6 Pa*10⁸
Optical stress coef.: 2.96 1/Pa*10¹²
Abrasion: 0.8

Climatic resistance: А
Resistance to acids: I

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	63
0 ~ 30	66
20 ~ 120	71
20 ~ 300	78

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-60 ~ 20	F	2.1
-60 ~ 20	e	1.8
-60 ~ 20	D	1.7
-60 ~ 20	C	1.6
20 ~ 120	F	3.7
20 ~ 120	e	3.4
20 ~ 120	D	3.3
20 ~ 120	C	3.1