TF7 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.728223 n_e = 1.734294	V_d = 28.33 V_e = 28.12	n_F - n_C = 0.025699 n_F' - n_C' = 0.026111

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.73833 C3 = 0.0516201 C4 = -0.00879411 C5 = 0.00179836 C6 = -0.000112648 C7 = 0.000641197 C8 = -0.0000317257 C9 = 0.000159293 C10 = 0 C11 = 0

Refraction index
n _2.3254	1.683169
n _1.9701	1.688041
n _1.5296	1.693950
n _1.06	1.702226
n _t	1.703400
n _s	1.708788
n _r	1.716745
n _C	1.720793
n _C'	1.721950
n _0.6328	1.723040
n _D	1.728000
n _d	1.728223
n _e	1.734294
n _F	1.746492
n _F'	1.748062
n _g	1.761949
n _h	1.775655
n _i	1.801258
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6768
P_C,A'	0.3095
P_d,C	0.2891
P_e,C	0.5253
P_g,d	1.3123
P_g,F	0.6014
P_h,g	0.5333
P_i,g	1.5295
P_C',t	0.7218
P_e,C'	0.4803
P_F',e	0.5357
P_i,F'	2.0699

Density: 4.52 g/cm³
Poisson coef.: 0.249
Rigidity: 212.7 Pa*10⁸
Young module: 531.2 Pa*10⁸
Optical stress coef.: 1.63 1/Pa*10¹²
Abrasion: 0.5

Climatic resistance: А
Resistance to acids: III

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	88
0 ~ 30	90
20 ~ 120	94
20 ~ 300	100

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-60 ~ 20	F	4.6
-60 ~ 20	e	3.1
-60 ~ 20	D	2.5
-60 ~ 20	C	1.9
20 ~ 120	F	7
20 ~ 120	e	5.4
20 ~ 120	D	4.6
20 ~ 120	C	3.9