BAL 5 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.547392 n_e = 1.549825	V_d = 53.55 V_e = 53.26	n_F - n_C = 0.010221 n_F' - n_C' = 0.010322	Coloring: 0.31 - 0.35 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.3550985 C2 = -0.0086952235 C3 = 0.013797477 C4 = 0.00027607581 C5 = 0.000000096025624 C6 = 0.00000060765812

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.536177
n _s	1.538932
n _r	1.542568
n _C	1.544310
n _C'	1.544799
n _0.6328	1.545257
n _D	1.547302
n _d	1.547392
n _e	1.549825
n _F	1.554532
n _F'	1.555122
n _g	1.560197
n _h	1.564959
n _i	1.573218
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7957
P_C,A'	0.3408
P_d,C	0.3014
P_e,C	0.5395
P_g,d	1.2526
P_g,F	0.5541
P_h,g	0.4659
P_i,g	1.2738
P_C',t	0.8435
P_e,C'	0.4917
P_F',e	0.5181
P_i,F'	1.7703

transmittance: 10 mm
τ_0.36	0.946
τ_0.37	0.968
τ_0.38	0.974
τ_0.39	0.985
τ_0.4	0.992
τ_0.42	0.993
τ_0.44	0.992
τ_0.46	0.995
τ_0.48	0.996
τ_0.5	0.997
τ_0.55	0.997
τ_0.6	0.996
τ_0.65	0.995
τ_0.7	0.995
τ_0.8	0.995
τ_0.9	0.993

Poisson coef.: 0.23
Rigidity: 298 Pa*10⁸
Young module: 732 Pa*10⁸
Knoop hardness: 520
Abrasion: 150

Climatic resistance: 2
Resistance to acids: 2.2
Phosphate resistance: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	92
100 ~ 300	106

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	C'	0.6
-20 ~ 0	C'	0.6
0 ~ 20	C'	0.6
20 ~ 40	C'	0.7
40 ~ 60	C'	0.9
60 ~ 80	C'	1.1
-40 ~ -20	D	0.7
-20 ~ 0	D	0.7
0 ~ 20	D	0.8
20 ~ 40	D	0.9
40 ~ 60	D	1.1
60 ~ 80	D	1.3
-40 ~ -20	e	0.9
-20 ~ 0	e	0.9
0 ~ 20	e	0.9
20 ~ 40	e	1.1
40 ~ 60	e	1.3
60 ~ 80	e	1.5
-40 ~ -20	F	1.3
-20 ~ 0	F	1.3
0 ~ 20	F	1.3
20 ~ 40	F	1.5
40 ~ 60	F	1.6
60 ~ 80	F	1.8
-40 ~ -20	g	1.6
-20 ~ 0	g	1.6
0 ~ 20	g	1.6
20 ~ 40	g	1.9
40 ~ 60	g	2.1
60 ~ 80	g	2.4