TBF3 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.755851 n_e = 1.760216	V_d = 41.16 V_e = 40.88	n_F - n_C = 0.018363 n_F' - n_C' = 0.018594

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.75863 C3 = 0.0355018 C4 = -0.0112903 C5 = -0.000812106 C6 = 0.0000817884 C7 = 0.000734978 C8 = 0.000191961 C9 = 0.000377578 C10 = -0.000563232 C11 = -0.000862719

Refraction index
n _2.3254	1.716407
n _1.9701	1.722141
n _1.5296	1.728650
n _1.06	1.736222
n _t	1.737179
n _s	1.741406
n _r	1.747415
n _C	1.750418
n _C'	1.751270
n _0.6328	1.752072
n _D	1.755690
n _d	1.755851
n _e	1.760216
n _F	1.768781
n _F'	1.769865
n _g	1.779288
n _h	1.788324
n _i	1.804184
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7209
P_C,A'	0.3230
P_d,C	0.2958
P_e,C	0.5335
P_g,d	1.2762
P_g,F	0.5721
P_h,g	0.4920
P_i,g	1.3557
P_C',t	0.7673
P_e,C'	0.4871
P_F',e	0.5254
P_i,F'	1.8688

Density: 4.47 g/cm³
Poisson coef.: 0.308
Young module: 921 Pa*10⁸
Optical stress coef.: 2.4 1/Pa*10¹²
Abrasion: 1.3

Climatic resistance: а
Resistance to acids: IV

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	64
0 ~ 30	69
20 ~ 120	75
20 ~ 300	86