BAL35Y - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.589130 n_e = 1.591425	V_d = 61.23 V_e = 60.99	n_F - n_C = 0.009621 n_F' - n_C' = 0.009696	Coloring: 0.29 - 0.32 mkm.

Type: Sellmeier
Spectral range: 0.326 - 2.325 mkm.
C1 = 1.26231429 C2 = 0.22515421 C3 = 0.639119345 C4 = 0.00695586355 C5 = 0.0221310699 C6 = 63.1662736

Refraction index
n _2.3254	-----
n _1.9701	1.564986
n _1.5296	1.571241
n _1.06	1.577428
n _t	1.578114
n _s	1.580925
n _r	1.584506
n _C	1.586189
n _C'	1.586659
n _0.6328	1.587097
n _D	1.589044
n _d	1.589130
n _e	1.591425
n _F	1.595811
n _F'	1.596356
n _g	1.601004
n _h	1.605302
n _i	1.612606
n _0.3341	1.620465
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8393
P_C,A'	0.3518
P_d,C	0.3056
P_e,C	0.5441
P_g,d	1.2341
P_g,F	0.5397
P_h,g	0.4467
P_i,g	1.2058
P_C',t	0.8881
P_e,C'	0.4953
P_F',e	0.5124
P_i,F'	1.6889

transmittance: 10 mm
τ_0.29	0.11
τ_0.3	0.5
τ_0.31	0.79
τ_0.32	0.92
τ_0.33	0.966
τ_0.34	0.984
τ_0.35	0.991
τ_0.36	0.994
τ_0.365	0.996
τ_0.37	0.996
τ_0.38	0.997
τ_0.39	0.998
τ_0.4	0.998
τ_0.42	0.999
τ_0.44	0.999
τ_0.46	0.999
τ_0.48	0.999
τ_0.5	0.999
τ_0.55	0.999
τ_0.6	0.999
τ_0.65	0.999
τ_0.7	0.999
τ_0.8	0.999
τ_0.9	0.999
τ₁	0.997
τ_1.2	0.997
τ_1.4	0.985
τ_1.6	0.993
τ_1.8	0.986
τ₂	0.973
τ_2.2	0.904
τ_2.4	0.82

Poisson coef.: 0.244
Rigidity: 354 Pa*10⁸
Young module: 881 Pa*10⁸
Knoop hardness: 550
Abrasion: 118

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

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	57
100 ~ 300	72

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	3.2
-20 ~ 0	t	3.2
0 ~ 20	t	3.3
20 ~ 40	t	3.3
40 ~ 60	t	3.4
60 ~ 80	t	3.5
-40 ~ -20	C'	3.4
-20 ~ 0	C'	3.5
0 ~ 20	C'	3.6
20 ~ 40	C'	3.7
40 ~ 60	C'	3.8
60 ~ 80	C'	3.9
-40 ~ -20		3.4
-20 ~ 0		3.5
0 ~ 20		3.6
20 ~ 40		3.7
40 ~ 60		3.8
60 ~ 80		3.9
-40 ~ -20	D	3.5
-20 ~ 0	D	3.6
0 ~ 20	D	3.7
20 ~ 40	D	3.9
40 ~ 60	D	4
60 ~ 80	D	4.1
-40 ~ -20	e	3.7
-20 ~ 0	e	3.8
0 ~ 20	e	3.9
20 ~ 40	e	4
40 ~ 60	e	4.1
60 ~ 80	e	4.2
-40 ~ -20	F	3.9
-20 ~ 0	F	4
0 ~ 20	F	4.2
20 ~ 40	F	4.3
40 ~ 60	F	4.4
60 ~ 80	F	4.5
-40 ~ -20	g	4.2
-20 ~ 0	g	4.3
0 ~ 20	g	4.4
20 ~ 40	g	4.6
40 ~ 60	g	4.7
60 ~ 80	g	4.9
-40 ~ -20	i	4.9
-20 ~ 0	i	5
0 ~ 20	i	5.2
20 ~ 40	i	5.4
40 ~ 60	i	5.6
60 ~ 80	i	5.7