S-BSM 4 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.612715 n_e = 1.615203	V_d = 58.71 V_e = 58.44	n_F - n_C = 0.010435 n_F' - n_C' = 0.010526	Coloring: 0.31 - 0.35 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 0.96244308 C2 = 0.595939234 C3 = 1.10558352 C4 = 0.00468062141 C5 = 0.0178772082 C6 = 115.896432

Refraction index
n _2.3254	-----
n _1.9701	1.588708
n _1.5296	1.594403
n _1.06	1.600381
n _t	1.601072
n _s	1.603963
n _r	1.607745
n _C	1.609546
n _C'	1.610050
n _0.6328	1.610521
n _D	1.612622
n _d	1.612715
n _e	1.615203
n _F	1.619981
n _F'	1.620577
n _g	1.625667
n _h	1.630390
n _i	1.638445
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8120
P_C,A'	0.3458
P_d,C	0.3037
P_e,C	0.5421
P_g,d	1.2411
P_g,F	0.5449
P_h,g	0.4526
P_i,g	1.2245
P_C',t	0.8603
P_e,C'	0.4938
P_F',e	0.5149
P_i,F'	1.7123

transmittance: 10 mm
τ_0.31	0.04
τ_0.32	0.24
τ_0.33	0.52
τ_0.34	0.73
τ_0.35	0.85
τ_0.36	0.924
τ_0.37	0.96
τ_0.38	0.977
τ_0.39	0.985
τ_0.4	0.991
τ_0.42	0.994
τ_0.44	0.995
τ_0.46	0.996
τ_0.48	0.997
τ_0.5	0.998
τ_0.55	0.998
τ_0.6	0.998
τ_0.65	0.998
τ_0.7	0.998
τ_0.8	0.998
τ_0.9	0.997
τ₁	0.997
τ_1.2	0.997
τ_1.4	0.99
τ_1.6	0.994
τ_1.8	0.985
τ₂	0.971
τ_2.2	0.911
τ_2.4	0.82

Poisson coef.: 0.265
Rigidity: 322 Pa*10⁸
Young module: 816 Pa*10⁸
Knoop hardness: 560
Abrasion: 142

Climatic resistance: 1
Resistance to acids: 51.2
Phosphate resistance: 2.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	67
100 ~ 300	76

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	1.8
-20 ~ 0	t	1.9
0 ~ 20	t	1.9
20 ~ 40	t	2
40 ~ 60	t	2
60 ~ 80	t	2.1
-40 ~ -20	C'	2
-20 ~ 0	C'	2.1
0 ~ 20	C'	2.2
20 ~ 40	C'	2.3
40 ~ 60	C'	2.3
60 ~ 80	C'	2.4
-40 ~ -20		2
-20 ~ 0		2.1
0 ~ 20		2.2
20 ~ 40		2.3
40 ~ 60		2.4
60 ~ 80		2.5
-40 ~ -20	D	2.1
-20 ~ 0	D	2.2
0 ~ 20	D	2.3
20 ~ 40	D	2.4
40 ~ 60	D	2.5
60 ~ 80	D	2.6
-40 ~ -20	e	2.2
-20 ~ 0	e	2.3
0 ~ 20	e	2.4
20 ~ 40	e	2.6
40 ~ 60	e	2.7
60 ~ 80	e	2.8
-40 ~ -20	F	2.5
-20 ~ 0	F	2.6
0 ~ 20	F	2.8
20 ~ 40	F	2.9
40 ~ 60	F	3
60 ~ 80	F	3.1
-40 ~ -20	g	2.8
-20 ~ 0	g	2.9
0 ~ 20	g	3.1
20 ~ 40	g	3.2
40 ~ 60	g	3.3
60 ~ 80	g	3.5