KF7 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.517598 n_e = 1.520005	V_d = 51.14 V_e = 50.85	n_F - n_C = 0.010120 n_F' - n_C' = 0.010224

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.51482 C3 = 0.0188797 C4 = -0.010335 C5 = -0.000612048 C6 = -0.000409653 C7 = 0.0000702987 C8 = -0.000361942 C9 = 0.000186032 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.489265
n _1.9701	1.494544
n _1.5296	1.500053
n _1.06	1.505815
n _t	1.506478
n _s	1.509235
n _r	1.512834
n _C	1.514554
n _C'	1.515037
n _0.6328	1.515488
n _D	1.517508
n _d	1.517598
n _e	1.520005
n _F	1.524675
n _F'	1.525261
n _g	1.530323
n _h	1.535113
n _i	1.543630
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7980
P_C,A'	0.3400
P_d,C	0.3007
P_e,C	0.5385
P_g,d	1.2573
P_g,F	0.5581
P_h,g	0.4733
P_i,g	1.3148
P_C',t	0.8457
P_e,C'	0.4909
P_F',e	0.5193
P_i,F'	1.8149

Density: 2.51 g/cm³
Poisson coef.: 0.2
Rigidity: 276.1 Pa*10⁸
Young module: 662.5 Pa*10⁸
Optical stress coef.: 3.21 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	55
0 ~ 30	57
20 ~ 120	59
20 ~ 300	64

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-60 ~ 20	F	3.1
-60 ~ 20	e	2.7
-60 ~ 20	D	2.5
-60 ~ 20	C	2.3
20 ~ 120	F	4.8
20 ~ 120	e	4.4
20 ~ 120	D	4.2
20 ~ 120	C	4