BAL15 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.556711 n_e = 1.558972	V_d = 58.68 V_e = 58.42	n_F - n_C = 0.009485 n_F' - n_C' = 0.009567	Coloring: 0.30 - 0.34 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.3876453 C2 = -0.0097564209 C3 = 0.01254688 C4 = 0.00038108489 C5 = -0.000023656347 C6 = 0.0000015068491

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.546013
n _s	1.548711
n _r	1.552183
n _C	1.553826
n _C'	1.554285
n _0.6328	1.554714
n _D	1.556626
n _d	1.556711
n _e	1.558972
n _F	1.563312
n _F'	1.563852
n _g	1.568474
n _h	1.572765
n _i	1.580114
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8236
P_C,A'	0.3476
P_d,C	0.3040
P_e,C	0.5425
P_g,d	1.2401
P_g,F	0.5442
P_h,g	0.4523
P_i,g	1.2271
P_C',t	0.8720
P_e,C'	0.4940
P_F',e	0.5144
P_i,F'	1.7143

transmittance: 10 mm
τ_0.35	0.935
τ_0.36	0.964
τ_0.37	0.977
τ_0.38	0.982
τ_0.39	0.99
τ_0.4	0.994
τ_0.42	0.995
τ_0.44	0.994
τ_0.46	0.995
τ_0.48	0.996
τ_0.5	0.996
τ_0.55	0.998
τ_0.6	0.998
τ_0.65	0.997
τ_0.7	0.998
τ_0.8	0.998
τ_0.9	0.997

Poisson coef.: 0.229
Rigidity: 322 Pa*10⁸
Young module: 791 Pa*10⁸
Knoop hardness: 530
Abrasion: 136

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	74
100 ~ 300	85

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	C'	2.5
-20 ~ 0	C'	2.5
0 ~ 20	C'	2.6
20 ~ 40	C'	2.7
40 ~ 60	C'	2.9
60 ~ 80	C'	3
-40 ~ -20	D	2.7
-20 ~ 0	D	2.7
0 ~ 20	D	2.8
20 ~ 40	D	2.9
40 ~ 60	D	3.1
60 ~ 80	D	3.3
-40 ~ -20	e	2.8
-20 ~ 0	e	2.8
0 ~ 20	e	2.9
20 ~ 40	e	3
40 ~ 60	e	3.2
60 ~ 80	e	3.4
-40 ~ -20	F	3.1
-20 ~ 0	F	3.1
0 ~ 20	F	3.2
20 ~ 40	F	3.4
40 ~ 60	F	3.6
60 ~ 80	F	3.8
-40 ~ -20	g	3.5
-20 ~ 0	g	3.5
0 ~ 20	g	3.6
20 ~ 40	g	3.7
40 ~ 60	g	3.9
60 ~ 80	g	4.1