S-BSM28 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.617721 n_e = 1.620671	V_d = 49.81 V_e = 49.52	n_F - n_C = 0.012400 n_F' - n_C' = 0.012533	Coloring: 0.34 - 0.39 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.43822841 C2 = 0.128100017 C3 = 1.3435553 C4 = 0.0085977975 C5 = 0.0408617854 C6 = 143.70989

Refraction index
n _2.3254	-----
n _1.9701	1.591725
n _1.5296	1.597396
n _1.06	1.603641
n _t	1.604393
n _s	1.607600
n _r	1.611915
n _C	1.614005
n _C'	1.614593
n _0.6328	1.615143
n _D	1.617612
n _d	1.617721
n _e	1.620671
n _F	1.626405
n _F'	1.627126
n _g	1.633353
n _h	1.639235
n _i	1.649533
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7751
P_C,A'	0.3359
P_d,C	0.2997
P_e,C	0.5375
P_g,d	1.2605
P_g,F	0.5603
P_h,g	0.4743
P_i,g	1.3047
P_C',t	0.8225
P_e,C'	0.4901
P_F',e	0.5206
P_i,F'	1.8069

transmittance: 10 mm
τ_0.34	0.02
τ_0.35	0.24
τ_0.36	0.54
τ_0.37	0.74
τ_0.38	0.85
τ_0.39	0.918
τ_0.4	0.95
τ_0.42	0.975
τ_0.44	0.982
τ_0.46	0.987
τ_0.48	0.99
τ_0.5	0.993
τ_0.55	0.997
τ_0.6	0.996
τ_0.65	0.996
τ_0.7	0.997
τ_0.8	0.997
τ_0.9	0.997
τ₁	0.996
τ_1.2	0.996
τ_1.4	0.994
τ_1.6	0.995
τ_1.8	0.988
τ₂	0.978
τ_2.2	0.944
τ_2.4	0.88

Poisson coef.: 0.258
Rigidity: 339 Pa*10⁸
Young module: 853 Pa*10⁸
Knoop hardness: 540
Abrasion: 168

Climatic resistance: 3
Resistance to acids: 51.2
Phosphate resistance: 3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	84
100 ~ 300	96

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	0.5
-20 ~ 0	t	0.6
0 ~ 20	t	0.7
20 ~ 40	t	0.7
40 ~ 60	t	0.8
60 ~ 80	t	0.8
-40 ~ -20	C'	0.9
-20 ~ 0	C'	1
0 ~ 20	C'	1.1
20 ~ 40	C'	1.1
40 ~ 60	C'	1.2
60 ~ 80	C'	1.3
-40 ~ -20		1
-20 ~ 0		1
0 ~ 20		1.1
20 ~ 40		1.2
40 ~ 60		1.2
60 ~ 80		1.3
-40 ~ -20	D	1.1
-20 ~ 0	D	1.2
0 ~ 20	D	1.2
20 ~ 40	D	1.3
40 ~ 60	D	1.4
60 ~ 80	D	1.5
-40 ~ -20	e	1.3
-20 ~ 0	e	1.4
0 ~ 20	e	1.5
20 ~ 40	e	1.5
40 ~ 60	e	1.6
60 ~ 80	e	1.7
-40 ~ -20	F	1.7
-20 ~ 0	F	1.8
0 ~ 20	F	1.9
20 ~ 40	F	2
40 ~ 60	F	2.1
60 ~ 80	F	2.2
-40 ~ -20	g	2.1
-20 ~ 0	g	2.3
0 ~ 20	g	2.4
20 ~ 40	g	2.5
40 ~ 60	g	2.6
60 ~ 80	g	2.8