S-BSM25 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.658440 n_e = 1.661521	V_d = 50.87 V_e = 50.59	n_F - n_C = 0.012941 n_F' - n_C' = 0.013075	Coloring: 0.33 - 0.38 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.34814257 C2 = 0.347530319 C3 = 1.38798368 C4 = 0.00695364366 C5 = 0.0277863478 C6 = 142.138122

Refraction index
n _2.3254	-----
n _1.9701	1.631451
n _1.5296	1.637265
n _1.06	1.643721
n _t	1.644503
n _s	1.647850
n _r	1.652365
n _C	1.654552
n _C'	1.655168
n _0.6328	1.655744
n _D	1.658326
n _d	1.658440
n _e	1.661521
n _F	1.667494
n _F'	1.668243
n _g	1.674691
n _h	1.680739
n _i	1.691206
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7764
P_C,A'	0.3369
P_d,C	0.3004
P_e,C	0.5384
P_g,d	1.2556
P_g,F	0.5560
P_h,g	0.4673
P_i,g	1.2761
P_C',t	0.8240
P_e,C'	0.4909
P_F',e	0.5194
P_i,F'	1.7743

transmittance: 10 mm
τ_0.33	0.03
τ_0.34	0.19
τ_0.35	0.48
τ_0.36	0.71
τ_0.37	0.84
τ_0.38	0.91
τ_0.39	0.945
τ_0.4	0.964
τ_0.42	0.98
τ_0.44	0.984
τ_0.46	0.988
τ_0.48	0.991
τ_0.5	0.994
τ_0.55	0.996
τ_0.6	0.995
τ_0.65	0.995
τ_0.7	0.996
τ_0.8	0.997
τ_0.9	0.997
τ₁	0.996
τ_1.2	0.997
τ_1.4	0.995
τ_1.6	0.995
τ_1.8	0.989
τ₂	0.98
τ_2.2	0.947
τ_2.4	0.87

Poisson coef.: 0.272
Rigidity: 374 Pa*10⁸
Young module: 951 Pa*10⁸
Knoop hardness: 560
Abrasion: 123

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

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	68
100 ~ 300	82

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	3.6
40 ~ 60	t	3.7
60 ~ 80	t	3.8
-40 ~ -20	C'	3.8
-20 ~ 0	C'	3.9
0 ~ 20	C'	4
20 ~ 40	C'	4.1
40 ~ 60	C'	4.2
60 ~ 80	C'	4.2
-40 ~ -20		3.9
-20 ~ 0		3.9
0 ~ 20		4
20 ~ 40		4.1
40 ~ 60		4.2
60 ~ 80		4.3
-40 ~ -20	D	4
-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	4.2
-20 ~ 0	e	4.3
0 ~ 20	e	4.4
20 ~ 40	e	4.5
40 ~ 60	e	4.6
60 ~ 80	e	4.7
-40 ~ -20	F	4.7
-20 ~ 0	F	4.8
0 ~ 20	F	4.9
20 ~ 40	F	5
40 ~ 60	F	5.1
60 ~ 80	F	5.2
-40 ~ -20	g	5.1
-20 ~ 0	g	5.3
0 ~ 20	g	5.4
20 ~ 40	g	5.5
40 ~ 60	g	5.7
60 ~ 80	g	5.8