BAL15Y - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.556711 n_e = 1.558973	V_d = 58.67 V_e = 58.41	n_F - n_C = 0.009487 n_F' - n_C' = 0.009568	Coloring: 0.30 - 0.32 mkm.

Type: Sellmeier
Spectral range: 0.326 - 2.325 mkm.
C1 = 1.28348331 C2 = 0.102800765 C3 = 0.404609885 C4 = 0.00790900515 C5 = 0.0305971274 C6 = 46.5268356

Refraction index
n _2.3254	-----
n _1.9701	1.533915
n _1.5296	1.539667
n _1.06	1.545395
n _t	1.546041
n _s	1.548717
n _r	1.552183
n _C	1.553826
n _C'	1.554285
n _0.6328	1.554714
n _D	1.556626
n _d	1.556711
n _e	1.558973
n _F	1.563313
n _F'	1.563854
n _g	1.568478
n _h	1.572773
n _i	1.580115
n _0.3341	1.588082
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8205
P_C,A'	0.3474
P_d,C	0.3041
P_e,C	0.5425
P_g,d	1.2403
P_g,F	0.5444
P_h,g	0.4526
P_i,g	1.2265
P_C',t	0.8689
P_e,C'	0.4941
P_F',e	0.5144
P_i,F'	1.7139

transmittance: 10 mm
τ_0.3	0.17
τ_0.31	0.59
τ_0.32	0.84
τ_0.33	0.937
τ_0.34	0.971
τ_0.35	0.985
τ_0.36	0.992
τ_0.365	0.994
τ_0.37	0.995
τ_0.38	0.996
τ_0.39	0.997
τ_0.4	0.998
τ_0.42	0.998
τ_0.44	0.998
τ_0.46	0.998
τ_0.48	0.998
τ_0.5	0.999
τ_0.55	0.999
τ_0.6	0.999
τ_0.65	0.998
τ_0.7	0.999
τ_0.8	0.999
τ_0.9	0.998
τ₁	0.996
τ_1.2	0.995
τ_1.4	0.989
τ_1.6	0.992
τ_1.8	0.984
τ₂	0.972
τ_2.2	0.927
τ_2.4	0.89

Poisson coef.: 0.236
Rigidity: 317 Pa*10⁸
Young module: 783 Pa*10⁸
Knoop hardness: 560
Abrasion: 113

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	76
100 ~ 300	90

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	2.2
-20 ~ 0	t	2.2
0 ~ 20	t	2.3
20 ~ 40	t	2.4
40 ~ 60	t	2.4
60 ~ 80	t	2.4
-40 ~ -20	C'	2.5
-20 ~ 0	C'	2.5
0 ~ 20	C'	2.6
20 ~ 40	C'	2.7
40 ~ 60	C'	2.8
60 ~ 80	C'	2.8
-40 ~ -20		2.5
-20 ~ 0		2.6
0 ~ 20		2.6
20 ~ 40		2.7
40 ~ 60		2.8
60 ~ 80		2.9
-40 ~ -20	D	2.6
-20 ~ 0	D	2.7
0 ~ 20	D	2.8
20 ~ 40	D	2.8
40 ~ 60	D	2.9
60 ~ 80	D	3
-40 ~ -20	e	2.8
-20 ~ 0	e	2.8
0 ~ 20	e	2.9
20 ~ 40	e	3
40 ~ 60	e	3.1
60 ~ 80	e	3.1
-40 ~ -20	F	3
-20 ~ 0	F	3.1
0 ~ 20	F	3.2
20 ~ 40	F	3.3
40 ~ 60	F	3.4
60 ~ 80	F	3.5
-40 ~ -20	g	3.3
-20 ~ 0	g	3.5
0 ~ 20	g	3.6
20 ~ 40	g	3.7
40 ~ 60	g	3.8
60 ~ 80	g	3.9
-40 ~ -20	i	4.2
-20 ~ 0	i	4.3
0 ~ 20	i	4.5
20 ~ 40	i	4.6
40 ~ 60	i	4.8
60 ~ 80	i	4.9