S-BSM81 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.639998 n_e = 1.642540	V_d = 60.07 V_e = 59.87	n_F - n_C = 0.010653 n_F' - n_C' = 0.010731	Coloring: 0.31 - 0.37 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.55250839 C2 = 0.0953908897 C3 = 1.27547489 C4 = 0.0111607655 C5 = -0.0208950411 C6 = 93.5161633

Refraction index
n _2.3254	-----
n _1.9701	1.611408
n _1.5296	1.619186
n _1.06	1.626721
n _t	1.627531
n _s	1.630793
n _r	1.634847
n _C	1.636730
n _C'	1.637253
n _0.6328	1.637740
n _D	1.639903
n _d	1.639998
n _e	1.642540
n _F	1.647383
n _F'	1.647984
n _g	1.653107
n _h	1.657837
n _i	1.665859
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8634
P_C,A'	0.3565
P_d,C	0.3068
P_e,C	0.5453
P_g,d	1.2304
P_g,F	0.5372
P_h,g	0.4439
P_i,g	1.1969
P_C',t	0.9125
P_e,C'	0.4962
P_F',e	0.5110
P_i,F'	1.6778

transmittance: 10 mm
τ_0.3	0.02
τ_0.31	0.08
τ_0.32	0.19
τ_0.33	0.35
τ_0.34	0.53
τ_0.35	0.69
τ_0.36	0.8
τ_0.37	0.88
τ_0.38	0.929
τ_0.39	0.955
τ_0.4	0.97
τ_0.42	0.984
τ_0.44	0.988
τ_0.46	0.992
τ_0.48	0.994
τ_0.5	0.996
τ_0.55	0.997
τ_0.6	0.995
τ_0.65	0.996
τ_0.7	0.997
τ_0.8	0.997
τ_0.9	0.996
τ₁	0.995
τ_1.2	0.995
τ_1.4	0.991
τ_1.6	0.992
τ_1.8	0.984
τ₂	0.961
τ_2.2	0.88
τ_2.4	0.61

Poisson coef.: 0.28
Rigidity: 415 Pa*10⁸
Young module: 1061 Pa*10⁸
Knoop hardness: 670
Abrasion: 89

Climatic resistance: 3
Resistance to acids: 53
Phosphate resistance: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	59
100 ~ 300	73

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	2.9
-20 ~ 0	t	2.9
0 ~ 20	t	3
20 ~ 40	t	3
40 ~ 60	t	3.1
60 ~ 80	t	3.1
-40 ~ -20	C'	3.1
-20 ~ 0	C'	3.2
0 ~ 20	C'	3.3
20 ~ 40	C'	3.4
40 ~ 60	C'	3.5
60 ~ 80	C'	3.6
-40 ~ -20		3.1
-20 ~ 0		3.2
0 ~ 20		3.3
20 ~ 40		3.4
40 ~ 60		3.5
60 ~ 80		3.6
-40 ~ -20	D	3.2
-20 ~ 0	D	3.3
0 ~ 20	D	3.4
20 ~ 40	D	3.5
40 ~ 60	D	3.6
60 ~ 80	D	3.7
-40 ~ -20	e	3.3
-20 ~ 0	e	3.4
0 ~ 20	e	3.5
20 ~ 40	e	3.6
40 ~ 60	e	3.7
60 ~ 80	e	3.8
-40 ~ -20	F	3.6
-20 ~ 0	F	3.7
0 ~ 20	F	3.8
20 ~ 40	F	3.9
40 ~ 60	F	4
60 ~ 80	F	4.2
-40 ~ -20	g	3.8
-20 ~ 0	g	4
0 ~ 20	g	4.1
20 ~ 40	g	4.2
40 ~ 60	g	4.4
60 ~ 80	g	4.5