BSM21 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.617195 n_e = 1.619916	V_d = 54.04 V_e = 53.75	n_F - n_C = 0.011420 n_F' - n_C' = 0.011532	Coloring: 0.32 - 0.36 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.5678687 C2 = -0.0086573333 C3 = 0.016591375 C4 = 0.00028655447 C5 = -0.0000034886754 C6 = 0.0000008927552

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.604796
n _s	1.607784
n _r	1.611806
n _C	1.613750
n _C'	1.614296
n _0.6328	1.614807
n _D	1.617094
n _d	1.617195
n _e	1.619916
n _F	1.625171
n _F'	1.625828
n _g	1.631468
n _h	1.636737
n _i	1.645825
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7839
P_C,A'	0.3395
P_d,C	0.3016
P_e,C	0.5399
P_g,d	1.2496
P_g,F	0.5513
P_h,g	0.4613
P_i,g	1.2571
P_C',t	0.8317
P_e,C'	0.4921
P_F',e	0.5176
P_i,F'	1.7509

transmittance: 10 mm
τ_0.37	0.916
τ_0.38	0.949
τ_0.39	0.967
τ_0.4	0.98
τ_0.42	0.989
τ_0.44	0.992
τ_0.46	0.993
τ_0.48	0.995
τ_0.5	0.997
τ_0.55	0.998
τ_0.6	0.997
τ_0.65	0.996
τ_0.7	0.997

Poisson coef.: 0.264
Rigidity: 309 Pa*10⁸
Young module: 781 Pa*10⁸
Knoop hardness: 520
Abrasion: 134

Climatic resistance: 2
Resistance to acids: 5.2
Phosphate resistance: 1.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	63
100 ~ 300	73

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	3.6
-20 ~ 0	t	3.5
0 ~ 20	t	3.7
20 ~ 40	t	3.7
40 ~ 60	t	3.8
60 ~ 80	t	4
-40 ~ -20	C'	4.2
-20 ~ 0	C'	4.1
0 ~ 20	C'	4.2
20 ~ 40	C'	4.3
40 ~ 60	C'	4.4
60 ~ 80	C'	4.5
-40 ~ -20		4.2
-20 ~ 0		4.1
0 ~ 20		4.3
20 ~ 40		4.3
40 ~ 60		4.4
60 ~ 80		4.6
-40 ~ -20	D	4.3
-20 ~ 0	D	4.3
0 ~ 20	D	4.4
20 ~ 40	D	4.5
40 ~ 60	D	4.6
60 ~ 80	D	4.8
-40 ~ -20	e	4.5
-20 ~ 0	e	4.5
0 ~ 20	e	4.6
20 ~ 40	e	4.7
40 ~ 60	e	4.8
60 ~ 80	e	4.9
-40 ~ -20	F	4.9
-20 ~ 0	F	4.9
0 ~ 20	F	4.9
20 ~ 40	F	5.1
40 ~ 60	F	5.2
60 ~ 80	F	5.4
-40 ~ -20	g	5.3
-20 ~ 0	g	5.3
0 ~ 20	g	5.4
20 ~ 40	g	5.6
40 ~ 60	g	5.7
60 ~ 80	g	5.9