S-NBH 8 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.720467 n_e = 1.725384	V_d = 34.70 V_e = 34.47	n_F - n_C = 0.020757 n_F' - n_C' = 0.021041	Coloring: 0.33 - 0.40 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.61344136 C2 = 0.257295888 C3 = 1.98364455 C4 = 0.0106386752 C5 = 0.0487071624 C6 = 159.784404

Refraction index
n _2.3254	-----
n _1.9701	1.681980
n _1.5296	1.689408
n _1.06	1.698167
n _t	1.699280
n _s	1.704163
n _r	1.710987
n _C	1.714364
n _C'	1.715322
n _0.6328	1.716222
n _D	1.720285
n _d	1.720467
n _e	1.725384
n _F	1.735122
n _F'	1.736364
n _g	1.747234
n _h	1.757768
n _i	1.776893
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7266
P_C,A'	0.3223
P_d,C	0.2939
P_e,C	0.5308
P_g,d	1.2895
P_g,F	0.5834
P_h,g	0.5074
P_i,g	1.4288
P_C',t	0.7728
P_e,C'	0.4847
P_F',e	0.5289
P_i,F'	1.9524

transmittance: 10 mm
τ_0.33	0.03
τ_0.34	0.24
τ_0.35	0.49
τ_0.36	0.67
τ_0.37	0.79
τ_0.38	0.86
τ_0.39	0.908
τ_0.4	0.936
τ_0.42	0.962
τ_0.44	0.972
τ_0.46	0.979
τ_0.48	0.984
τ_0.5	0.989
τ_0.55	0.996
τ_0.6	0.997
τ_0.65	0.997
τ_0.7	0.998
τ_0.8	0.999
τ_0.9	0.999
τ₁	0.999
τ_1.2	0.999
τ_1.4	0.997
τ_1.6	0.997
τ_1.8	0.992
τ₂	0.984
τ_2.2	0.955
τ_2.4	0.88

Poisson coef.: 0.25
Rigidity: 407 Pa*10⁸
Young module: 1017 Pa*10⁸
Knoop hardness: 590
Abrasion: 155

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

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

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	2.2
20 ~ 40	t	2.2
40 ~ 60	t	2.3
60 ~ 80	t	2.4
-40 ~ -20	C'	3
-20 ~ 0	C'	3
0 ~ 20	C'	3.1
20 ~ 40	C'	3.1
40 ~ 60	C'	3.2
60 ~ 80	C'	3.3
-40 ~ -20		3
-20 ~ 0		3.1
0 ~ 20		3.1
20 ~ 40		3.2
40 ~ 60		3.3
60 ~ 80		3.3
-40 ~ -20	D	3.3
-20 ~ 0	D	3.4
0 ~ 20	D	3.4
20 ~ 40	D	3.5
40 ~ 60	D	3.6
60 ~ 80	D	3.6
-40 ~ -20	e	3.6
-20 ~ 0	e	3.7
0 ~ 20	e	3.8
20 ~ 40	e	3.9
40 ~ 60	e	3.9
60 ~ 80	e	4
-40 ~ -20	F	4.3
-20 ~ 0	F	4.5
0 ~ 20	F	4.6
20 ~ 40	F	4.7
40 ~ 60	F	4.9
60 ~ 80	F	5
-40 ~ -20	g	5.2
-20 ~ 0	g	5.4
0 ~ 20	g	5.5
20 ~ 40	g	5.7
40 ~ 60	g	5.9
60 ~ 80	g	6.1