S-BAH28 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.723419 n_e = 1.727934	V_d = 37.95 V_e = 37.67	n_F - n_C = 0.019059 n_F' - n_C' = 0.019319	Coloring: 0.36 - 0.42 mkm.

Type: Sellmeier
Spectral range: 0.4046561 - 2.325 mkm.
C1 = 1.69493484 C2 = 0.192890298 C3 = 1.56385948 C4 = 0.010272319 C5 = 0.052118764 C6 = 137.818035

Refraction index
n _2.3254	-----
n _1.9701	1.688084
n _1.5296	1.694900
n _1.06	1.702936
n _t	1.703958
n _s	1.708444
n _r	1.714713
n _C	1.717815
n _C'	1.718695
n _0.6328	1.719521
n _D	1.723253
n _d	1.723419
n _e	1.727934
n _F	1.736875
n _F'	1.738015
n _g	1.748000
n _h	1.757688
n _i	-----
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7270
P_C,A'	0.3224
P_d,C	0.2940
P_e,C	0.5309
P_g,d	1.2896
P_g,F	0.5836
P_h,g	0.5083
P_i,g	-----
P_C',t	0.7731
P_e,C'	0.4847
P_F',e	0.5288
P_i,F'	-----

transmittance: 10 mm
τ_0.36	0.06
τ_0.37	0.32
τ_0.38	0.58
τ_0.39	0.75
τ_0.4	0.85
τ_0.42	0.934
τ_0.44	0.963
τ_0.46	0.975
τ_0.48	0.982
τ_0.5	0.987
τ_0.55	0.994
τ_0.6	0.995
τ_0.65	0.995
τ_0.7	0.996
τ_0.8	0.998
τ_0.9	0.998
τ₁	0.998
τ_1.2	0.998
τ_1.4	0.994
τ_1.6	0.995
τ_1.8	0.99
τ₂	0.979
τ_2.2	0.938
τ_2.4	0.84

Poisson coef.: 0.213
Rigidity: 375 Pa*10⁸
Young module: 911 Pa*10⁸
Knoop hardness: 600
Abrasion: 138

Climatic resistance: 1
Resistance to acids: 4
Phosphate resistance: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	66
100 ~ 300	73

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
20 ~ 40	t	4.1
40 ~ 60	t	4.2
60 ~ 80	t	4.3
-40 ~ -20	C'	4.5
-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	4.8
-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
0 ~ 20	F	6.2
20 ~ 40	F	6.5
40 ~ 60	F	6.7
60 ~ 80	F	6.9
-40 ~ -20	g	6.6
-20 ~ 0	g	6.9
0 ~ 20	g	7.1
20 ~ 40	g	7.4
40 ~ 60	g	7.7
60 ~ 80	g	7.9