S-BAL50 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.559625 n_e = 1.561808	V_d = 61.17 V_e = 60.93	n_F - n_C = 0.009148 n_F' - n_C' = 0.009220	Coloring: 0.30 - 0.35 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.3982661 C2 = -0.010222781 C3 = 0.012110445 C4 = 0.00037767581 C5 = -0.000027339021 C6 = 0.0000015701891

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.549150
n _s	1.551828
n _r	1.555231
n _C	1.556830
n _C'	1.557276
n _0.6328	1.557692
n _D	1.559543
n _d	1.559625
n _e	1.561808
n _F	1.565978
n _F'	1.566496
n _g	1.570911
n _h	1.574989
n _i	1.581928
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8394
P_C,A'	0.3514
P_d,C	0.3055
P_e,C	0.5441
P_g,d	1.2337
P_g,F	0.5392
P_h,g	0.4457
P_i,g	1.2042
P_C',t	0.8882
P_e,C'	0.4953
P_F',e	0.5125
P_i,F'	1.6868

transmittance: 10 mm
τ_0.36	0.942
τ_0.37	0.967
τ_0.38	0.977
τ_0.39	0.985
τ_0.4	0.989
τ_0.42	0.99
τ_0.44	0.99
τ_0.46	0.992
τ_0.48	0.994
τ_0.5	0.995
τ_0.55	0.997
τ_0.6	0.996
τ_0.65	0.995
τ_0.7	0.996

Poisson coef.: 0.238
Rigidity: 358 Pa*10⁸
Young module: 885 Pa*10⁸
Knoop hardness: 620
Abrasion: 115

Climatic resistance: 2
Resistance to acids: 4.2
Phosphate resistance: 2.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	75
100 ~ 300	90

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	2.1
-20 ~ 0	t	2.2
0 ~ 20	t	2.2
20 ~ 40	t	2.4
40 ~ 60	t	2.6
60 ~ 80	t	2.8
-40 ~ -20	C'	2.4
-20 ~ 0	C'	2.5
0 ~ 20	C'	2.6
20 ~ 40	C'	2.8
40 ~ 60	C'	3.1
60 ~ 80	C'	3.3
-40 ~ -20		2.4
-20 ~ 0		2.5
0 ~ 20		2.6
20 ~ 40		2.8
40 ~ 60		3.1
60 ~ 80		3.3
-40 ~ -20	D	2.5
-20 ~ 0	D	2.6
0 ~ 20	D	2.7
20 ~ 40	D	2.9
40 ~ 60	D	3.2
60 ~ 80	D	3.5
-40 ~ -20	e	2.6
-20 ~ 0	e	2.7
0 ~ 20	e	2.9
20 ~ 40	e	3.1
40 ~ 60	e	3.4
60 ~ 80	e	3.6
-40 ~ -20	F	2.9
-20 ~ 0	F	3
0 ~ 20	F	3.2
20 ~ 40	F	3.4
40 ~ 60	F	3.7
60 ~ 80	F	4
-40 ~ -20	g	3.2
-20 ~ 0	g	3.3
0 ~ 20	g	3.5
20 ~ 40	g	3.7
40 ~ 60	g	4
60 ~ 80	g	4.3