S-BSM 2 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.607378 n_e = 1.609926	V_d = 56.81 V_e = 56.52	n_F - n_C = 0.010690 n_F' - n_C' = 0.010789	Coloring: 0.31 - 0.35 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 0.867168676 C2 = 0.672848343 C3 = 1.18456107 C4 = 0.00369311003 C5 = 0.0181652804 C6 = 132.376147

Refraction index
n _2.3254	-----
n _1.9701	1.583738
n _1.5296	1.589131
n _1.06	1.594927
n _t	1.595610
n _s	1.598493
n _r	1.602313
n _C	1.604144
n _C'	1.604657
n _0.6328	1.605138
n _D	1.607283
n _d	1.607378
n _e	1.609926
n _F	1.614834
n _F'	1.615447
n _g	1.620696
n _h	1.625581
n _i	1.633940
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7982
P_C,A'	0.3425
P_d,C	0.3025
P_e,C	0.5409
P_g,d	1.2458
P_g,F	0.5483
P_h,g	0.4569
P_i,g	1.2388
P_C',t	0.8463
P_e,C'	0.4928
P_F',e	0.5164
P_i,F'	1.7299

transmittance: 10 mm
τ_0.31	0.04
τ_0.32	0.27
τ_0.33	0.57
τ_0.34	0.77
τ_0.35	0.88
τ_0.36	0.941
τ_0.37	0.967
τ_0.38	0.981
τ_0.39	0.987
τ_0.4	0.991
τ_0.42	0.991
τ_0.44	0.99
τ_0.46	0.991
τ_0.48	0.993
τ_0.5	0.995
τ_0.55	0.997
τ_0.6	0.997
τ_0.65	0.996
τ_0.7	0.998
τ_0.8	0.999
τ_0.9	0.998
τ₁	0.998
τ_1.2	0.998
τ_1.4	0.994
τ_1.6	0.997
τ_1.8	0.992
τ₂	0.984
τ_2.2	0.951
τ_2.4	0.89

Poisson coef.: 0.264
Rigidity: 309 Pa*10⁸
Young module: 780 Pa*10⁸
Knoop hardness: 560
Abrasion: 133

Climatic resistance: 2
Resistance to acids: 5.2
Phosphate resistance: 2.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	65
100 ~ 300	74

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	3.1
-20 ~ 0	t	3.2
0 ~ 20	t	3.3
20 ~ 40	t	3.4
40 ~ 60	t	3.4
60 ~ 80	t	3.5
-40 ~ -20	C'	3.5
-20 ~ 0	C'	3.6
0 ~ 20	C'	3.7
20 ~ 40	C'	3.8
40 ~ 60	C'	3.9
60 ~ 80	C'	4
-40 ~ -20		3.6
-20 ~ 0		3.7
0 ~ 20		3.7
20 ~ 40		3.8
40 ~ 60		3.9
60 ~ 80		4
-40 ~ -20	D	3.7
-20 ~ 0	D	3.8
0 ~ 20	D	3.9
20 ~ 40	D	4
40 ~ 60	D	4.1
60 ~ 80	D	4.2
-40 ~ -20	e	3.8
-20 ~ 0	e	3.9
0 ~ 20	e	4
20 ~ 40	e	4.1
40 ~ 60	e	4.3
60 ~ 80	e	4.4
-40 ~ -20	F	4.2
-20 ~ 0	F	4.3
0 ~ 20	F	4.4
20 ~ 40	F	4.5
40 ~ 60	F	4.7
60 ~ 80	F	4.8
-40 ~ -20	g	4.5
-20 ~ 0	g	4.7
0 ~ 20	g	4.8
20 ~ 40	g	4.9
40 ~ 60	g	5.1
60 ~ 80	g	5.2