L-BAL35 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.589129 n_e = 1.591427	V_d = 61.15 V_e = 60.93	n_F - n_C = 0.009633 n_F' - n_C' = 0.009706	Coloring: 0.30 - 0.35 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.1626263 C2 = 0.325661051 C3 = 1.35132486 C4 = 0.0125957437 C5 = -0.0032691105 C6 = 119.214596

Refraction index
n _2.3254	-----
n _1.9701	1.564072
n _1.5296	1.570692
n _1.06	1.577233
n _t	1.577947
n _s	1.580845
n _r	1.584481
n _C	1.586177
n _C'	1.586649
n _0.6328	1.587089
n _D	1.589043
n _d	1.589129
n _e	1.591427
n _F	1.595811
n _F'	1.596355
n _g	1.600996
n _h	1.605284
n _i	1.612564
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8542
P_C,A'	0.3548
P_d,C	0.3063
P_e,C	0.5449
P_g,d	1.2318
P_g,F	0.5382
P_h,g	0.4450
P_i,g	1.2007
P_C',t	0.9032
P_e,C'	0.4959
P_F',e	0.5115
P_i,F'	1.6824

transmittance: 10 mm
τ_0.3	0.06
τ_0.31	0.27
τ_0.32	0.53
τ_0.33	0.73
τ_0.34	0.85
τ_0.35	0.922
τ_0.36	0.956
τ_0.37	0.975
τ_0.38	0.984
τ_0.39	0.989
τ_0.4	0.992
τ_0.42	0.993
τ_0.44	0.993
τ_0.46	0.995
τ_0.48	0.996
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
τ₁	0.997
τ_1.2	0.997
τ_1.4	0.991
τ_1.6	0.994
τ_1.8	0.989
τ₂	0.978
τ_2.2	0.934
τ_2.4	0.81

Poisson coef.: 0.252
Rigidity: 403 Pa*10⁸
Young module: 1008 Pa*10⁸
Knoop hardness: 630
Abrasion: 100

Climatic resistance: 3
Resistance to acids: 52.2
Phosphate resistance: 3.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	66
100 ~ 300	81

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	3.9
-20 ~ 0	t	3.9
0 ~ 20	t	4
20 ~ 40	t	4
40 ~ 60	t	4.1
60 ~ 80	t	4.1
-40 ~ -20	C'	4.3
-20 ~ 0	C'	4.3
0 ~ 20	C'	4.4
20 ~ 40	C'	4.4
40 ~ 60	C'	4.5
60 ~ 80	C'	4.5
-40 ~ -20		4.3
-20 ~ 0		4.3
0 ~ 20		4.4
20 ~ 40		4.5
40 ~ 60		4.5
60 ~ 80		4.6
-40 ~ -20	D	4.4
-20 ~ 0	D	4.5
0 ~ 20	D	4.5
20 ~ 40	D	4.6
40 ~ 60	D	4.7
60 ~ 80	D	4.8
-40 ~ -20	e	4.5
-20 ~ 0	e	4.6
0 ~ 20	e	4.7
20 ~ 40	e	4.7
40 ~ 60	e	4.8
60 ~ 80	e	4.9
-40 ~ -20	F	4.8
-20 ~ 0	F	4.9
0 ~ 20	F	5
20 ~ 40	F	5.1
40 ~ 60	F	5.2
60 ~ 80	F	5.2
-40 ~ -20	g	5.1
-20 ~ 0	g	5.2
0 ~ 20	g	5.3
20 ~ 40	g	5.4
40 ~ 60	g	5.5
60 ~ 80	g	5.6