S-BSM71 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.648497 n_e = 1.651409	V_d = 53.02 V_e = 52.73	n_F - n_C = 0.012230 n_F' - n_C' = 0.012353	Coloring: 0.34 - 0.38 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.50847885 C2 = 0.158099826 C3 = 1.36815368 C4 = 0.00812769076 C5 = 0.0354200898 C6 = 136.110038

Refraction index
n _2.3254	-----
n _1.9701	1.622048
n _1.5296	1.627985
n _1.06	1.634419
n _t	1.635183
n _s	1.638421
n _r	1.642737
n _C	1.644815
n _C'	1.645398
n _0.6328	1.645945
n _D	1.648389
n _d	1.648497
n _e	1.651409
n _F	1.657045
n _F'	1.657752
n _g	1.663831
n _h	1.669537
n _i	1.679430
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7875
P_C,A'	0.3393
P_d,C	0.3011
P_e,C	0.5391
P_g,d	1.2537
P_g,F	0.5548
P_h,g	0.4665
P_i,g	1.2754
P_C',t	0.8352
P_e,C'	0.4914
P_F',e	0.5186
P_i,F'	1.7725

transmittance: 10 mm
τ_0.34	0.15
τ_0.35	0.47
τ_0.36	0.72
τ_0.37	0.86
τ_0.38	0.926
τ_0.39	0.958
τ_0.4	0.973
τ_0.42	0.985
τ_0.44	0.988
τ_0.46	0.99
τ_0.48	0.993
τ_0.5	0.995
τ_0.55	0.998
τ_0.6	0.997
τ_0.65	0.996
τ_0.7	0.997
τ_0.8	0.998
τ_0.9	0.998
τ₁	0.997
τ_1.2	0.997
τ_1.4	0.993
τ_1.6	0.993
τ_1.8	0.985
τ₂	0.972
τ_2.2	0.925
τ_2.4	0.82

Poisson coef.: 0.273
Rigidity: 339 Pa*10⁸
Young module: 862 Pa*10⁸
Knoop hardness: 560
Abrasion: 173

Climatic resistance: 2
Resistance to acids: 53.2
Phosphate resistance: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	71
100 ~ 300	83

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	1.3
-20 ~ 0	t	1.2
0 ~ 20	t	1.3
20 ~ 40	t	1.4
40 ~ 60	t	1.5
60 ~ 80	t	1.6
-40 ~ -20	C'	1.5
-20 ~ 0	C'	1.6
0 ~ 20	C'	1.8
20 ~ 40	C'	2
40 ~ 60	C'	2.2
60 ~ 80	C'	2.5
-40 ~ -20		1.6
-20 ~ 0		1.6
0 ~ 20		1.8
20 ~ 40		2
40 ~ 60		2.2
60 ~ 80		2.5
-40 ~ -20	D	1.7
-20 ~ 0	D	1.8
0 ~ 20	D	1.9
20 ~ 40	D	2.1
40 ~ 60	D	2.4
60 ~ 80	D	2.7
-40 ~ -20	e	1.8
-20 ~ 0	e	1.9
0 ~ 20	e	2.1
20 ~ 40	e	2.3
40 ~ 60	e	2.6
60 ~ 80	e	2.9
-40 ~ -20	F	2.1
-20 ~ 0	F	2.3
0 ~ 20	F	2.5
20 ~ 40	F	2.8
40 ~ 60	F	3.1
60 ~ 80	F	3.5
-40 ~ -20	g	2.6
-20 ~ 0	g	2.7
0 ~ 20	g	3
20 ~ 40	g	3.2
40 ~ 60	g	3.5
60 ~ 80	g	3.9