BAH32 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.669978 n_e = 1.674024	V_d = 39.27 V_e = 39.00	n_F - n_C = 0.017056 n_F' - n_C' = 0.017280	Coloring: 0.33 - 0.38 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.49864277 C2 = 0.217567824 C3 = 1.55972766 C4 = 0.00964325492 C5 = 0.0451166588 C6 = 171.112143

Refraction index
n _2.3254	-----
n _1.9701	1.638994
n _1.5296	1.644709
n _1.06	1.651658
n _t	1.652560
n _s	1.656547
n _r	1.662163
n _C	1.664949
n _C'	1.665739
n _0.6328	1.666480
n _D	1.669829
n _d	1.669978
n _e	1.674024
n _F	1.682005
n _F'	1.683019
n _g	1.691863
n _h	1.700364
n _i	1.715610
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7263
P_C,A'	0.3233
P_d,C	0.2948
P_e,C	0.5320
P_g,d	1.2830
P_g,F	0.5779
P_h,g	0.4984
P_i,g	1.3922
P_C',t	0.7726
P_e,C'	0.4857
P_F',e	0.5273
P_i,F'	1.9107

transmittance: 10 mm
τ_0.33	0.04
τ_0.34	0.31
τ_0.35	0.63
τ_0.36	0.81
τ_0.37	0.89
τ_0.38	0.933
τ_0.39	0.954
τ_0.4	0.968
τ_0.42	0.982
τ_0.44	0.987
τ_0.46	0.991
τ_0.48	0.994
τ_0.5	0.996
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	0.998
τ_1.2	0.997
τ_1.4	0.993
τ_1.6	0.995
τ_1.8	0.988
τ₂	0.98
τ_2.2	0.951
τ_2.4	0.927

Poisson coef.: 0.248
Rigidity: 292 Pa*10⁸
Young module: 729 Pa*10⁸
Knoop hardness: 480
Abrasion: 175

Climatic resistance: 2
Resistance to acids: 1.2
Phosphate resistance: 1

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

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	3.8
-20 ~ 0	t	3.9
0 ~ 20	t	4.1
20 ~ 40	t	4.2
40 ~ 60	t	4.3
60 ~ 80	t	4.3
-40 ~ -20	C'	4.4
-20 ~ 0	C'	4.6
0 ~ 20	C'	4.8
20 ~ 40	C'	4.9
40 ~ 60	C'	5.1
60 ~ 80	C'	5.2
-40 ~ -20		4.5
-20 ~ 0		4.7
0 ~ 20		4.8
20 ~ 40		5
40 ~ 60		5.1
60 ~ 80		5.3
-40 ~ -20	D	4.7
-20 ~ 0	D	4.9
0 ~ 20	D	5.1
20 ~ 40	D	5.2
40 ~ 60	D	5.4
60 ~ 80	D	5.6
-40 ~ -20	e	5.1
-20 ~ 0	e	5.3
0 ~ 20	e	5.4
20 ~ 40	e	5.6
40 ~ 60	e	5.8
60 ~ 80	e	6
-40 ~ -20	F	5.8
-20 ~ 0	F	6.1
0 ~ 20	F	6.3
20 ~ 40	F	6.5
40 ~ 60	F	6.7
60 ~ 80	F	6.9
-40 ~ -20	g	6.7
-20 ~ 0	g	6.9
0 ~ 20	g	7.1
20 ~ 40	g	7.4
40 ~ 60	g	7.6
60 ~ 80	g	7.9