BSM 4 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.612715 n_e = 1.615202	V_d = 58.74 V_e = 58.46	n_F - n_C = 0.010429 n_F' - n_C' = 0.010522	Coloring: 0.30 - 0.35 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.5596925 C2 = -0.010144636 C3 = 0.014261777 C4 = 0.00047531992 C5 = -0.000031287664 C6 = 0.000001735988

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.601110
n _s	1.603993
n _r	1.607757
n _C	1.609552
n _C'	1.610054
n _0.6328	1.610524
n _D	1.612622
n _d	1.612715
n _e	1.615202
n _F	1.619981
n _F'	1.620577
n _g	1.625665
n _h	1.630381
n _i	1.638425
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8093
P_C,A'	0.3446
P_d,C	0.3033
P_e,C	0.5417
P_g,d	1.2416
P_g,F	0.5450
P_h,g	0.4521
P_i,g	1.2234
P_C',t	0.8575
P_e,C'	0.4935
P_F',e	0.5153
P_i,F'	1.7113

transmittance: 10 mm
τ_0.36	0.93
τ_0.37	0.96
τ_0.38	0.976
τ_0.39	0.984
τ_0.4	0.99
τ_0.42	0.994
τ_0.44	0.994
τ_0.46	0.995
τ_0.48	0.996
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

Poisson coef.: 0.266
Rigidity: 323 Pa*10⁸
Young module: 817 Pa*10⁸
Knoop hardness: 560
Abrasion: 144

Climatic resistance: 3
Resistance to acids: 51.2
Phosphate resistance: 2.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	66
100 ~ 300	76

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	2
-20 ~ 0	t	2
0 ~ 20	t	2.1
20 ~ 40	t	2.2
40 ~ 60	t	2.3
60 ~ 80	t	2.3
-40 ~ -20	C'	2.3
-20 ~ 0	C'	2.4
0 ~ 20	C'	2.4
20 ~ 40	C'	2.5
40 ~ 60	C'	2.5
60 ~ 80	C'	2.5
-40 ~ -20		2.3
-20 ~ 0		2.4
0 ~ 20		2.5
20 ~ 40		2.5
40 ~ 60		2.5
60 ~ 80		2.6
-40 ~ -20	D	2.4
-20 ~ 0	D	2.5
0 ~ 20	D	2.6
20 ~ 40	D	2.6
40 ~ 60	D	2.6
60 ~ 80	D	2.7
-40 ~ -20	e	2.5
-20 ~ 0	e	2.6
0 ~ 20	e	2.7
20 ~ 40	e	2.7
40 ~ 60	e	2.8
60 ~ 80	e	2.9
-40 ~ -20	F	2.7
-20 ~ 0	F	2.9
0 ~ 20	F	2.9
20 ~ 40	F	3
40 ~ 60	F	3.1
60 ~ 80	F	3.2
-40 ~ -20	g	3
-20 ~ 0	g	3.2
0 ~ 20	g	3.3
20 ~ 40	g	3.4
40 ~ 60	g	3.5
60 ~ 80	g	3.6