BAL 2 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.570988 n_e = 1.573663	V_d = 50.79 V_e = 50.49	n_F - n_C = 0.011240 n_F' - n_C' = 0.011360	Coloring: 0.32 - 0.35 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.4243116 C2 = -0.0085847399 C3 = 0.014720452 C4 = 0.00055045609 C5 = -0.000031707382 C6 = 0.0000024207572

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.558940
n _s	1.561832
n _r	1.565729
n _C	1.567620
n _C'	1.568152
n _0.6328	1.568651
n _D	1.570889
n _d	1.570988
n _e	1.573663
n _F	1.578860
n _F'	1.579513
n _g	1.585139
n _h	1.590433
n _i	1.599667
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7721
P_C,A'	0.3351
P_d,C	0.2996
P_e,C	0.5376
P_g,d	1.2588
P_g,F	0.5585
P_h,g	0.4710
P_i,g	1.2925
P_C',t	0.8195
P_e,C'	0.4902
P_F',e	0.5204
P_i,F'	1.7929

transmittance: 10 mm
τ_0.35	0.93
τ_0.36	0.961
τ_0.37	0.975
τ_0.38	0.982
τ_0.39	0.987
τ_0.4	0.991
τ_0.42	0.993
τ_0.44	0.993
τ_0.46	0.993
τ_0.48	0.995
τ_0.5	0.996
τ_0.55	0.998
τ_0.6	0.998
τ_0.65	0.996
τ_0.7	0.998

Poisson coef.: 0.249
Rigidity: 274 Pa*10⁸
Young module: 683 Pa*10⁸
Knoop hardness: 460
Abrasion: 170

Climatic resistance: 1
Resistance to acids: 4.1
Phosphate resistance: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	100
100 ~ 300	116

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	-0.6
-20 ~ 0	t	-0.7
0 ~ 20	t	-0.7
20 ~ 40	t	-0.7
40 ~ 60	t	-0.6
60 ~ 80	t	-0.5
-20 ~ 0	C'	-0.1
0 ~ 20	C'	-0.2
20 ~ 40	C'	-0.2
40 ~ 60	C'	-0.1
60 ~ 80	C'	-0.1
-20 ~ 0		-0.1
0 ~ 20		-0.2
20 ~ 40		-0.2
-40 ~ -20	D	0.2
-20 ~ 0	D	0.1
40 ~ 60	D	0.1
60 ~ 80	D	0.1
-40 ~ -20	e	0.4
-20 ~ 0	e	0.3
0 ~ 20	e	0.2
20 ~ 40	e	0.2
40 ~ 60	e	0.3
60 ~ 80	e	0.3
-40 ~ -20	F	0.8
-20 ~ 0	F	0.7
0 ~ 20	F	0.7
20 ~ 40	F	0.7
40 ~ 60	F	0.8
60 ~ 80	F	0.9
-40 ~ -20	g	1.2
-20 ~ 0	g	1.2
0 ~ 20	g	1.2
20 ~ 40	g	1.2
40 ~ 60	g	1.3
60 ~ 80	g	1.4