S-BAL42 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.583125 n_e = 1.585467	V_d = 59.37 V_e = 59.10	n_F - n_C = 0.009821 n_F' - n_C' = 0.009904	Coloring: 0.29 - 0.34 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.39570615 C2 = 0.071850507 C3 = 1.27129267 C4 = 0.0112218843 C5 = -0.0252117422 C6 = 134.49786

Refraction index
n _2.3254	-----
n _1.9701	1.559924
n _1.5296	1.565570
n _1.06	1.571416
n _t	1.572083
n _s	1.574850
n _r	1.578437
n _C	1.580138
n _C'	1.580614
n _0.6328	1.581058
n _D	1.583038
n _d	1.583125
n _e	1.585467
n _F	1.589959
n _F'	1.590519
n _g	1.595296
n _h	1.599721
n _i	1.607242
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8202
P_C,A'	0.3474
P_d,C	0.3041
P_e,C	0.5426
P_g,d	1.2392
P_g,F	0.5434
P_h,g	0.4505
P_i,g	1.2163
P_C',t	0.8686
P_e,C'	0.4942
P_F',e	0.5143
P_i,F'	1.7028

transmittance: 10 mm
τ_0.29	0.03
τ_0.3	0.15
τ_0.31	0.36
τ_0.32	0.58
τ_0.33	0.75
τ_0.34	0.86
τ_0.35	0.932
τ_0.36	0.964
τ_0.37	0.979
τ_0.38	0.986
τ_0.39	0.991
τ_0.4	0.993
τ_0.42	0.995
τ_0.44	0.995
τ_0.46	0.996
τ_0.48	0.997
τ_0.5	0.998
τ_0.55	0.999
τ_0.6	0.998
τ_0.65	0.998
τ_0.7	0.998
τ_0.8	0.998
τ_0.9	0.997
τ₁	0.997
τ_1.2	0.997
τ_1.4	0.987
τ_1.6	0.994
τ_1.8	0.985
τ₂	0.973
τ_2.2	0.917
τ_2.4	0.86

Poisson coef.: 0.246
Rigidity: 340 Pa*10⁸
Young module: 847 Pa*10⁸
Knoop hardness: 570
Abrasion: 117

Climatic resistance: 1
Resistance to acids: 1.2
Phosphate resistance: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	66
100 ~ 300	76

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	2.9
-20 ~ 0	t	2.9
0 ~ 20	t	3
20 ~ 40	t	3
40 ~ 60	t	3
60 ~ 80	t	3.1
-40 ~ -20	C'	3.2
-20 ~ 0	C'	3.3
0 ~ 20	C'	3.3
20 ~ 40	C'	3.4
40 ~ 60	C'	3.4
60 ~ 80	C'	3.5
-40 ~ -20		3.2
-20 ~ 0		3.3
0 ~ 20		3.3
20 ~ 40		3.4
40 ~ 60		3.4
60 ~ 80		3.5
-40 ~ -20	D	3.3
-20 ~ 0	D	3.4
0 ~ 20	D	3.4
20 ~ 40	D	3.5
40 ~ 60	D	3.6
60 ~ 80	D	3.7
-40 ~ -20	e	3.5
-20 ~ 0	e	3.5
0 ~ 20	e	3.6
20 ~ 40	e	3.7
40 ~ 60	e	3.7
60 ~ 80	e	3.8
-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	4.2
-40 ~ -20	g	4
-20 ~ 0	g	4.1
0 ~ 20	g	4.2
20 ~ 40	g	4.3
40 ~ 60	g	4.4
60 ~ 80	g	4.5