BAL14 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.568831 n_e = 1.571238	V_d = 56.33 V_e = 56.06	n_F - n_C = 0.010096 n_F' - n_C' = 0.010188	Coloring: 0.31 - 0.35 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.4219957 C2 = -0.0092001613 C3 = 0.013740447 C4 = 0.00034858198 C5 = -0.000016646492 C6 = 0.0000013137506

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.557631
n _s	1.560404
n _r	1.564038
n _C	1.565773
n _C'	1.566259
n _0.6328	1.566713
n _D	1.568742
n _d	1.568831
n _e	1.571238
n _F	1.575869
n _F'	1.576447
n _g	1.581399
n _h	1.586013
n _i	1.593946
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8063
P_C,A'	0.3439
P_d,C	0.3029
P_e,C	0.5412
P_g,d	1.2448
P_g,F	0.5477
P_h,g	0.4569
P_i,g	1.2426
P_C',t	0.8544
P_e,C'	0.4931
P_F',e	0.5159
P_i,F'	1.7331

transmittance: 10 mm
τ_0.36	0.937
τ_0.37	0.963
τ_0.38	0.971
τ_0.39	0.983
τ_0.4	0.99
τ_0.42	0.992
τ_0.44	0.991
τ_0.46	0.993
τ_0.48	0.994
τ_0.5	0.995
τ_0.55	0.997
τ_0.6	0.996
τ_0.65	0.996
τ_0.7	0.997
τ_0.8	0.997
τ_0.9	0.997

Poisson coef.: 0.243
Rigidity: 276 Pa*10⁸
Young module: 687 Pa*10⁸
Knoop hardness: 530
Abrasion: 130

Climatic resistance: 1
Resistance to acids: 4.2
Phosphate resistance: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	73
100 ~ 300	85

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	2.6
-20 ~ 0	t	2.6
0 ~ 20	t	2.7
20 ~ 40	t	2.7
40 ~ 60	t	2.8
60 ~ 80	t	2.9
-40 ~ -20	C'	3.2
-20 ~ 0	C'	3.2
0 ~ 20	C'	3.2
20 ~ 40	C'	3.3
40 ~ 60	C'	3.4
60 ~ 80	C'	3.5
-40 ~ -20		3.3
-20 ~ 0		3.2
0 ~ 20		3.3
20 ~ 40		3.3
40 ~ 60		3.4
60 ~ 80		3.5
-40 ~ -20	D	3.4
-20 ~ 0	D	3.3
0 ~ 20	D	3.4
20 ~ 40	D	3.5
40 ~ 60	D	3.6
60 ~ 80	D	3.7
-40 ~ -20	e	3.6
-20 ~ 0	e	3.5
0 ~ 20	e	3.6
20 ~ 40	e	3.7
40 ~ 60	e	3.8
60 ~ 80	e	3.9
-40 ~ -20	F	3.9
-20 ~ 0	F	3.9
0 ~ 20	F	3.9
20 ~ 40	F	4.1
40 ~ 60	F	4.2
60 ~ 80	F	4.4
-40 ~ -20	g	4.3
-20 ~ 0	g	4.3
0 ~ 20	g	4.4
20 ~ 40	g	4.5
40 ~ 60	g	4.6
60 ~ 80	g	4.8