BAL22 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.568728 n_e = 1.570877	V_d = 63.16 V_e = 62.92	n_F - n_C = 0.009004 n_F' - n_C' = 0.009071	Coloring: 0.31 - 0.36 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.4288186 C2 = -0.011600847 C3 = 0.011085736 C4 = 0.00063122 C5 = -0.000063951229 C6 = 0.0000034400107

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.558272
n _s	1.560995
n _r	1.564388
n _C	1.565970
n _C'	1.566411
n _0.6328	1.566822
n _D	1.568647
n _d	1.568728
n _e	1.570877
n _F	1.574974
n _F'	1.575482
n _g	1.579804
n _h	1.583786
n _i	1.590569
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8548
P_C,A'	0.3540
P_d,C	0.3062
P_e,C	0.5449
P_g,d	1.2300
P_g,F	0.5363
P_h,g	0.4422
P_i,g	1.1956
P_C',t	0.9038
P_e,C'	0.4960
P_F',e	0.5114
P_i,F'	1.6755

transmittance: 10 mm
τ_0.37	0.926
τ_0.38	0.95
τ_0.39	0.97
τ_0.4	0.981
τ_0.42	0.987
τ_0.44	0.987
τ_0.46	0.99
τ_0.48	0.992
τ_0.5	0.994
τ_0.55	0.996
τ_0.6	0.995
τ_0.65	0.994
τ_0.7	0.996

Poisson coef.: 0.238
Rigidity: 345 Pa*10⁸
Young module: 854 Pa*10⁸
Knoop hardness: 550
Abrasion: 116

Climatic resistance: 3
Resistance to acids: 51.2
Phosphate resistance: 3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	66
100 ~ 300	79

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	2.1
-20 ~ 0	t	2.1
0 ~ 20	t	2.2
20 ~ 40	t	2.3
40 ~ 60	t	2.5
60 ~ 80	t	2.6
-40 ~ -20	C'	2.3
-20 ~ 0	C'	2.3
0 ~ 20	C'	2.5
20 ~ 40	C'	2.6
40 ~ 60	C'	2.8
60 ~ 80	C'	3
-40 ~ -20		2.3
-20 ~ 0		2.3
0 ~ 20		2.5
20 ~ 40		2.6
40 ~ 60		2.8
60 ~ 80		3
-40 ~ -20	D	2.4
-20 ~ 0	D	2.4
0 ~ 20	D	2.5
20 ~ 40	D	2.7
40 ~ 60	D	2.9
60 ~ 80	D	3.1
-40 ~ -20	e	2.5
-20 ~ 0	e	2.5
0 ~ 20	e	2.7
20 ~ 40	e	2.8
40 ~ 60	e	3
60 ~ 80	e	3.2
-40 ~ -20	F	2.7
-20 ~ 0	F	2.7
0 ~ 20	F	2.9
20 ~ 40	F	3.1
40 ~ 60	F	3.3
60 ~ 80	F	3.6
-40 ~ -20	g	3
-20 ~ 0	g	3
0 ~ 20	g	3.2
20 ~ 40	g	3.3
40 ~ 60	g	3.6
60 ~ 80	g	3.8