TBF8 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.858500 n_e = 1.864054	V_d = 36.64 V_e = 36.40	n_F - n_C = 0.023427 n_F' - n_C' = 0.023735

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.86465 C3 = 0.0460345 C4 = -0.0133658 C5 = -0.000687633 C6 = -0.000205069 C7 = 0.00038656 C8 = 0.000883265 C9 = -0.000706721 C10 = -0.00151517 C11 = 0.000914075

Refraction index
n _2.3254	1.808381
n _1.9701	1.815484
n _1.5296	1.823656
n _1.06	1.833308
n _t	1.834544
n _s	1.840022
n _r	1.847757
n _C	1.851590
n _C'	1.852676
n _0.6328	1.853696
n _D	1.858295
n _d	1.858500
n _e	1.864054
n _F	1.875018
n _F'	1.876411
n _g	1.888562
n _h	1.900222
n _i	1.921349
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7276
P_C,A'	0.3241
P_d,C	0.2949
P_e,C	0.5320
P_g,d	1.2831
P_g,F	0.5781
P_h,g	0.4976
P_i,g	1.3995
P_C',t	0.7739
P_e,C'	0.4856
P_F',e	0.5274
P_i,F'	1.9181

Density: 4.93 g/cm³
Optical stress coef.: 2.45 1/Pa*10¹²
Abrasion: 1.09

Climatic resistance: с
Resistance to acids: IV

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	55
0 ~ 30	58
20 ~ 120	63
20 ~ 300	72