BSM22 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.622295 n_e = 1.625081	V_d = 53.18 V_e = 52.89	n_F - n_C = 0.011700 n_F' - n_C' = 0.011817	Coloring: 0.32 - 0.36 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.35096968 C2 = 0.232444715 C3 = 1.17899988 C4 = 0.00745483509 C5 = 0.0294940262 C6 = 131.620201

Refraction index
n _2.3254	-----
n _1.9701	1.597488
n _1.5296	1.602923
n _1.06	1.608897
n _t	1.609616
n _s	1.612678
n _r	1.616788
n _C	1.618773
n _C'	1.619331
n _0.6328	1.619853
n _D	1.622192
n _d	1.622295
n _e	1.625081
n _F	1.630473
n _F'	1.631149
n _g	1.636955
n _h	1.642391
n _i	1.651779
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7826
P_C,A'	0.3385
P_d,C	0.3010
P_e,C	0.5391
P_g,d	1.2529
P_g,F	0.5539
P_h,g	0.4646
P_i,g	1.2669
P_C',t	0.8303
P_e,C'	0.4914
P_F',e	0.5185
P_i,F'	1.7632

transmittance: 10 mm
τ_0.32	0.11
τ_0.33	0.46
τ_0.34	0.75
τ_0.35	0.88
τ_0.36	0.947
τ_0.37	0.973
τ_0.38	0.985
τ_0.39	0.991
τ_0.4	0.994
τ_0.42	0.996
τ_0.44	0.997
τ_0.46	0.997
τ_0.48	0.998
τ_0.5	0.998
τ_0.55	0.999
τ_0.6	0.998
τ_0.65	0.998
τ_0.7	0.998
τ_0.8	0.999
τ_0.9	0.998
τ₁	0.998
τ_1.2	0.998
τ_1.4	0.99
τ_1.6	0.993
τ_1.8	0.985
τ₂	0.973
τ_2.2	0.924
τ_2.4	0.86

Poisson coef.: 0.266
Rigidity: 307 Pa*10⁸
Young module: 778 Pa*10⁸
Knoop hardness: 530
Abrasion: 151

Climatic resistance: 2
Resistance to acids: 51.2
Phosphate resistance: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	64
100 ~ 300	77

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	3.3
-20 ~ 0	t	3.4
0 ~ 20	t	3.5
20 ~ 40	t	3.6
40 ~ 60	t	3.7
60 ~ 80	t	3.8
-40 ~ -20	C'	3.7
-20 ~ 0	C'	3.8
0 ~ 20	C'	3.9
20 ~ 40	C'	4
40 ~ 60	C'	4.1
60 ~ 80	C'	4.2
-40 ~ -20		3.7
-20 ~ 0		3.8
0 ~ 20		4
20 ~ 40		4.1
40 ~ 60		4.2
60 ~ 80		4.3
-40 ~ -20	D	3.9
-20 ~ 0	D	4
0 ~ 20	D	4.1
20 ~ 40	D	4.2
40 ~ 60	D	4.3
60 ~ 80	D	4.5
-40 ~ -20	e	4.1
-20 ~ 0	e	4.2
0 ~ 20	e	4.3
20 ~ 40	e	4.4
40 ~ 60	e	4.5
60 ~ 80	e	4.7
-40 ~ -20	F	4.5
-20 ~ 0	F	4.6
0 ~ 20	F	4.7
20 ~ 40	F	4.9
40 ~ 60	F	5
60 ~ 80	F	5.1
-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	5.6