OF4 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.650633 n_e = 1.654191	V_d = 43.46 V_e = 43.24	n_F - n_C = 0.014968 n_F' - n_C' = 0.015127

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.64705 C3 = 0.0282914 C4 = -0.0160792 C5 = -0.00088744 C6 = -0.000268983 C7 = 0.00031617 C8 = 0.000341316 C9 = -0.000131975 C10 = -0.00091096 C11 = 0

Refraction index
n _2.3254	1.608023
n _1.9701	1.616056
n _1.5296	1.624646
n _1.06	1.633313
n _t	1.634283
n _s	1.638318
n _r	1.643605
n _C	1.646140
n _C'	1.646852
n _0.6328	1.647518
n _D	1.650501
n _d	1.650633
n _e	1.654191
n _F	1.661109
n _F'	1.661979
n _g	1.669512
n _h	1.676654
n _i	1.689194
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7921
P_C,A'	0.3385
P_d,C	0.3001
P_e,C	0.5378
P_g,d	1.2612
P_g,F	0.5614
P_h,g	0.4771
P_i,g	1.3148
P_C',t	0.8396
P_e,C'	0.4902
P_F',e	0.5203
P_i,F'	1.8181

Density: 3.48 g/cm³
Poisson coef.: 0.283
Rigidity: 265.1 Pa*10⁸
Young module: 680.1 Pa*10⁸
Optical stress coef.: 2.55 1/Pa*10¹²
Abrasion: 0.6

Climatic resistance: а
Resistance to acids: IV

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	44
0 ~ 30	47
20 ~ 120	52
20 ~ 300	60

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-60 ~ 20	F	2.4
-60 ~ 20	e	2
-60 ~ 20	D	1.8
-60 ~ 20	C	1.6
20 ~ 120	F	4
20 ~ 120	e	3.6
20 ~ 120	D	3.3
20 ~ 120	C	3.1