TF12 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.785163 n_e = 1.792368	V_d = 25.66 V_e = 25.45	n_F - n_C = 0.030593 n_F' - n_C' = 0.031128

Type: Resnik
Spectral range: 0.365 - 2.6 mkm.
C1 = 0.033306 C2 = 1.80321 C3 = 0.0632575 C4 = -0.00905151 C5 = 0.0017267 C6 = 0.000114615 C7 = 0.000937762 C8 = 0.00137024 C9 = -0.0000298793 C10 = -0.00214367 C11 = 0.00254152

Refraction index
n _2.3254	1.733445
n _1.9701	1.738675
n _1.5296	1.745405
n _1.06	1.754788
n _t	1.756126
n _s	1.762343
n _r	1.771645
n _C	1.776400
n _C'	1.777762
n _0.6328	1.779045
n _D	1.784899
n _d	1.785163
n _e	1.792368
n _F	1.806993
n _F'	1.808890
n _g	1.825808
n _h	1.842810
n _i	1.877278
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6626
P_C,A'	0.3050
P_d,C	0.2864
P_e,C	0.5219
P_g,d	1.3285
P_g,F	0.6150
P_h,g	0.5557
P_i,g	1.6823
P_C',t	0.7071
P_e,C'	0.4774
P_F',e	0.5400
P_i,F'	2.2353

Density: 4.74 g/cm³
Poisson coef.: 0.236
Young module: 657 Pa*10⁸
Optical stress coef.: 1.2 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	58
20 ~ 120	63
20 ~ 300	70