BAL35 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.589129 n_e = 1.591426	V_d = 61.18 V_e = 60.93	n_F - n_C = 0.009629 n_F' - n_C' = 0.009706	Coloring: 0.30 - 0.36 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.4875253 C2 = -0.010228673 C3 = 0.013743059 C4 = 0.00016625379 C5 = 0.0000062513497 C6 = -0.00000023420409

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.578143
n _s	1.580935
n _r	1.584507
n _C	1.586189
n _C'	1.586658
n _0.6328	1.587096
n _D	1.589043
n _d	1.589129
n _e	1.591426
n _F	1.595818
n _F'	1.596364
n _g	1.601022
n _h	1.605327
n _i	1.612630
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8355
P_C,A'	0.3510
P_d,C	0.3053
P_e,C	0.5438
P_g,d	1.2350
P_g,F	0.5404
P_h,g	0.4471
P_i,g	1.2055
P_C',t	0.8842
P_e,C'	0.4951
P_F',e	0.5128
P_i,F'	1.6892

transmittance: 10 mm
τ_0.37	0.942
τ_0.38	0.965
τ_0.39	0.977
τ_0.4	0.986
τ_0.42	0.992
τ_0.44	0.993
τ_0.46	0.994
τ_0.48	0.996
τ_0.5	0.997
τ_0.55	0.998
τ_0.6	0.997
τ_0.65	0.996
τ_0.7	0.997

Poisson coef.: 0.253
Rigidity: 331 Pa*10⁸
Young module: 830 Pa*10⁸
Knoop hardness: 590
Abrasion: 110

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	58
100 ~ 300	67

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	C'	3.3
-20 ~ 0	C'	3.3
0 ~ 20	C'	3.3
20 ~ 40	C'	3.5
40 ~ 60	C'	3.6
60 ~ 80	C'	3.8
-40 ~ -20	D	3.4
-20 ~ 0	D	3.4
0 ~ 20	D	3.5
20 ~ 40	D	3.6
40 ~ 60	D	3.8
60 ~ 80	D	4
-40 ~ -20	e	3.5
-20 ~ 0	e	3.5
0 ~ 20	e	3.6
20 ~ 40	e	3.7
40 ~ 60	e	3.9
60 ~ 80	e	4.1
-40 ~ -20	F	3.8
-20 ~ 0	F	3.8
0 ~ 20	F	3.9
20 ~ 40	F	4
40 ~ 60	F	4.1
60 ~ 80	F	4.3
-40 ~ -20	g	4
-20 ~ 0	g	4
0 ~ 20	g	4.2
20 ~ 40	g	4.3
40 ~ 60	g	4.5
60 ~ 80	g	4.8