BSM28 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.617721 n_e = 1.620668	V_d = 49.83 V_e = 49.53	n_F - n_C = 0.012396 n_F' - n_C' = 0.012531	Coloring: 0.34 - 0.39 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.5680878 C2 = -0.010467158 C3 = 0.016601965 C4 = 0.00058093478 C5 = -0.000023562088 C6 = 0.0000022311422

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.604370
n _s	1.607607
n _r	1.611924
n _C	1.614010
n _C'	1.614596
n _0.6328	1.615146
n _D	1.617611
n _d	1.617721
n _e	1.620668
n _F	1.626406
n _F'	1.627128
n _g	1.633363
n _h	1.639257
n _i	1.649588
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7776
P_C,A'	0.3356
P_d,C	0.2994
P_e,C	0.5371
P_g,d	1.2618
P_g,F	0.5612
P_h,g	0.4754
P_i,g	1.3088
P_C',t	0.8250
P_e,C'	0.4898
P_F',e	0.5210
P_i,F'	1.8119

transmittance: 10 mm
τ_0.39	0.924
τ_0.4	0.952
τ_0.42	0.974
τ_0.44	0.979
τ_0.46	0.984
τ_0.48	0.988
τ_0.5	0.991
τ_0.55	0.995
τ_0.6	0.994
τ_0.65	0.993
τ_0.7	0.994
τ_0.8	0.994
τ_0.9	0.992

Poisson coef.: 0.261
Rigidity: 321 Pa*10⁸
Young module: 809 Pa*10⁸
Knoop hardness: 490
Abrasion: 189

Climatic resistance: 3
Resistance to acids: 51.3
Phosphate resistance: 3.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	84
100 ~ 300	95

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	C'	0.6
-20 ~ 0	C'	0.5
0 ~ 20	C'	0.4
20 ~ 40	C'	0.4
40 ~ 60	C'	0.5
60 ~ 80	C'	0.5
-40 ~ -20	D	0.8
-20 ~ 0	D	0.6
0 ~ 20	D	0.6
20 ~ 40	D	0.6
40 ~ 60	D	0.7
60 ~ 80	D	0.7
-40 ~ -20	e	1
-20 ~ 0	e	0.9
0 ~ 20	e	0.8
20 ~ 40	e	0.8
40 ~ 60	e	0.9
60 ~ 80	e	0.9
-40 ~ -20	F	1.4
-20 ~ 0	F	1.3
0 ~ 20	F	1.3
20 ~ 40	F	1.3
40 ~ 60	F	1.4
60 ~ 80	F	1.4
-40 ~ -20	g	1.8
-20 ~ 0	g	1.7
0 ~ 20	g	1.7
20 ~ 40	g	1.8
40 ~ 60	g	1.9
60 ~ 80	g	2