BSM 9 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.614046 n_e = 1.616707	V_d = 54.97 V_e = 54.68	n_F - n_C = 0.011170 n_F' - n_C' = 0.011278	Coloring: 0.31 - 0.36 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.09508582 C2 = 0.464230389 C3 = 1.20305596 C4 = 0.00535489274 C5 = 0.0220678106 C6 = 133.312917

Refraction index
n _2.3254	-----
n _1.9701	1.589782
n _1.5296	1.595229
n _1.06	1.601135
n _t	1.601836
n _s	1.604810
n _r	1.608770
n _C	1.610675
n _C'	1.611209
n _0.6328	1.611710
n _D	1.613947
n _d	1.614046
n _e	1.616707
n _F	1.621845
n _F'	1.622488
n _g	1.628001
n _h	1.633146
n _i	1.641987
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7912
P_C,A'	0.3406
P_d,C	0.3018
P_e,C	0.5400
P_g,d	1.2492
P_g,F	0.5510
P_h,g	0.4606
P_i,g	1.2520
P_C',t	0.8390
P_e,C'	0.4921
P_F',e	0.5174
P_i,F'	1.7456

transmittance: 10 mm
τ_0.31	0.03
τ_0.32	0.24
τ_0.33	0.55
τ_0.34	0.76
τ_0.35	0.87
τ_0.36	0.927
τ_0.37	0.955
τ_0.38	0.971
τ_0.39	0.98
τ_0.4	0.986
τ_0.42	0.991
τ_0.44	0.992
τ_0.46	0.994
τ_0.48	0.995
τ_0.5	0.997
τ_0.55	0.998
τ_0.6	0.997
τ_0.65	0.997
τ_0.7	0.997
τ_0.8	0.998
τ_0.9	0.997
τ₁	0.996
τ_1.2	0.996
τ_1.4	0.99
τ_1.6	0.993
τ_1.8	0.987
τ₂	0.977
τ_2.2	0.939
τ_2.4	0.88

Poisson coef.: 0.265
Rigidity: 308 Pa*10⁸
Young module: 778 Pa*10⁸
Knoop hardness: 530
Abrasion: 141

Climatic resistance: 1
Resistance to acids: 5.2
Phosphate resistance: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	61
100 ~ 300	72

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	3.4
-20 ~ 0	t	3.5
0 ~ 20	t	3.6
20 ~ 40	t	3.7
40 ~ 60	t	3.8
60 ~ 80	t	3.9
-40 ~ -20	C'	3.8
-20 ~ 0	C'	3.9
0 ~ 20	C'	4
20 ~ 40	C'	4.1
40 ~ 60	C'	4.3
60 ~ 80	C'	4.4
-40 ~ -20		3.8
-20 ~ 0		3.9
0 ~ 20		4
20 ~ 40		4.2
40 ~ 60		4.3
60 ~ 80		4.4
-40 ~ -20	D	3.9
-20 ~ 0	D	4.1
0 ~ 20	D	4.2
20 ~ 40	D	4.3
40 ~ 60	D	4.4
60 ~ 80	D	4.5
-40 ~ -20	e	4.1
-20 ~ 0	e	4.2
0 ~ 20	e	4.4
20 ~ 40	e	4.5
40 ~ 60	e	4.6
60 ~ 80	e	4.7
-40 ~ -20	F	4.5
-20 ~ 0	F	4.6
0 ~ 20	F	4.8
20 ~ 40	F	4.9
40 ~ 60	F	5.1
60 ~ 80	F	5.2
-40 ~ -20	g	4.9
-20 ~ 0	g	5
0 ~ 20	g	5.2
20 ~ 40	g	5.3
40 ~ 60	g	5.5
60 ~ 80	g	5.7