L-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 = 59.38 V_e = 59.13	n_F - n_C = 0.009819 n_F' - n_C' = 0.009901	Coloring: 0.29 - 0.34 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.39528097 C2 = 0.072551952 C3 = 1.66335848 C4 = 0.011186203 C5 = -0.0246748575 C6 = 167.717958

Refraction index
n _2.3254	-----
n _1.9701	1.559487
n _1.5296	1.565326
n _1.06	1.571332
n _t	1.572011
n _s	1.574816
n _r	1.578427
n _C	1.580134
n _C'	1.580610
n _0.6328	1.581056
n _D	1.583038
n _d	1.583125
n _e	1.585467
n _F	1.589953
n _F'	1.590511
n _g	1.595279
n _h	1.599691
n _i	1.607188
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8272
P_C,A'	0.3489
P_d,C	0.3046
P_e,C	0.5431
P_g,d	1.2377
P_g,F	0.5423
P_h,g	0.4493
P_i,g	1.2128
P_C',t	0.8757
P_e,C'	0.4945
P_F',e	0.5137
P_i,F'	1.6983

transmittance: 10 mm
τ_0.29	0.05
τ_0.3	0.19
τ_0.31	0.41
τ_0.32	0.63
τ_0.33	0.79
τ_0.34	0.89
τ_0.35	0.94
τ_0.36	0.968
τ_0.37	0.981
τ_0.38	0.987
τ_0.39	0.992
τ_0.4	0.994
τ_0.42	0.994
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	0.999
τ_0.9	0.998

Poisson coef.: 0.247
Rigidity: 357 Pa*10⁸
Young module: 891 Pa*10⁸
Knoop hardness: 590
Abrasion: 113

Climatic resistance: 1
Resistance to acids: 5.2
Phosphate resistance: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	72
100 ~ 300	88

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	C'	3.2
-20 ~ 0	C'	3.2
0 ~ 20	C'	3.2
20 ~ 40	C'	3.2
40 ~ 60	C'	3.2
60 ~ 80	C'	3.2
-40 ~ -20		3.2
-20 ~ 0		3.2
0 ~ 20		3.2
20 ~ 40		3.2
40 ~ 60		3.2
60 ~ 80		3.2
-40 ~ -20	D	3.3
-20 ~ 0	D	3.3
0 ~ 20	D	3.3
20 ~ 40	D	3.3
40 ~ 60	D	3.3
60 ~ 80	D	3.3
-40 ~ -20	e	3.4
-20 ~ 0	e	3.5
0 ~ 20	e	3.5
20 ~ 40	e	3.5
40 ~ 60	e	3.5
60 ~ 80	e	3.5
-40 ~ -20	F	3.8
-20 ~ 0	F	3.8
0 ~ 20	F	3.8
20 ~ 40	F	3.8
40 ~ 60	F	3.9
60 ~ 80	F	3.9
-40 ~ -20	g	4.1
-20 ~ 0	g	4.1
0 ~ 20	g	4.2
20 ~ 40	g	4.2
40 ~ 60	g	4.2
60 ~ 80	g	4.3