BAH71 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.701998 n_e = 1.706152	V_d = 40.09 V_e = 39.81	n_F - n_C = 0.017507 n_F' - n_C' = 0.017736	Coloring: 0.36 - 0.40 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.8219169 C2 = -0.0099182972 C3 = 0.02439388 C4 = 0.00099651859 C5 = -0.000045521985 C6 = 0.0000055512807

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.684146
n _s	1.688224
n _r	1.693976
n _C	1.696834
n _C'	1.697645
n _0.6328	1.698406
n _D	1.701844
n _d	1.701998
n _e	1.706152
n _F	1.714341
n _F'	1.715381
n _g	1.724440
n _h	1.733143
n _i	1.748767
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7246
P_C,A'	0.3230
P_d,C	0.2949
P_e,C	0.5322
P_g,d	1.2818
P_g,F	0.5768
P_h,g	0.4970
P_i,g	1.3895
P_C',t	0.7709
P_e,C'	0.4859
P_F',e	0.5271
P_i,F'	1.9069

transmittance: 10 mm
τ_0.4	0.905
τ_0.42	0.958
τ_0.44	0.973
τ_0.46	0.981
τ_0.48	0.986
τ_0.5	0.991
τ_0.55	0.996
τ_0.6	0.995
τ_0.65	0.994
τ_0.7	0.995

Poisson coef.: 0.269
Rigidity: 339 Pa*10⁸
Young module: 861 Pa*10⁸
Knoop hardness: 500
Abrasion: 174

Climatic resistance: 2
Resistance to acids: 4.2
Phosphate resistance: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	74
100 ~ 300	84

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	3.3
-20 ~ 0	t	3.4
0 ~ 20	t	3.4
20 ~ 40	t	3.5
40 ~ 60	t	3.8
60 ~ 80	t	3.9
-40 ~ -20	C'	4
-20 ~ 0	C'	4.1
0 ~ 20	C'	4.2
20 ~ 40	C'	4.4
40 ~ 60	C'	4.7
60 ~ 80	C'	4.9
-40 ~ -20		4.1
-20 ~ 0		4.2
0 ~ 20		4.3
20 ~ 40		4.5
40 ~ 60		4.8
60 ~ 80		5
-40 ~ -20	D	4.3
-20 ~ 0	D	4.4
0 ~ 20	D	4.6
20 ~ 40	D	4.8
40 ~ 60	D	5.1
60 ~ 80	D	5.4
-40 ~ -20	e	4.7
-20 ~ 0	e	4.8
0 ~ 20	e	4.9
20 ~ 40	e	5.1
40 ~ 60	e	5.4
60 ~ 80	e	5.7
-40 ~ -20	F	5.4
-20 ~ 0	F	5.5
0 ~ 20	F	5.7
20 ~ 40	F	6
40 ~ 60	F	6.2
60 ~ 80	F	6.6
-40 ~ -20	g	6.2
-20 ~ 0	g	6.4
0 ~ 20	g	6.6
20 ~ 40	g	6.9
40 ~ 60	g	7.2
60 ~ 80	g	7.6