BAL12 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.539955 n_e = 1.542121	V_d = 59.45 V_e = 59.16	n_F - n_C = 0.009081 n_F' - n_C' = 0.009162	Coloring: 0.29 - 0.33 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.3391354 C2 = -0.0096450533 C3 = 0.010722377 C4 = 0.00071851576 C5 = -0.000069113009 C6 = 0.0000035434016

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.529793
n _s	1.532349
n _r	1.535638
n _C	1.537201
n _C'	1.537639
n _0.6328	1.538048
n _D	1.539874
n _d	1.539955
n _e	1.542121
n _F	1.546283
n _F'	1.546801
n _g	1.551226
n _h	1.555320
n _i	1.562314
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8157
P_C,A'	0.3448
P_d,C	0.3032
P_e,C	0.5417
P_g,d	1.2410
P_g,F	0.5442
P_h,g	0.4508
P_i,g	1.2209
P_C',t	0.8639
P_e,C'	0.4935
P_F',e	0.5153
P_i,F'	1.7080

transmittance: 10 mm
τ_0.34	0.944
τ_0.35	0.968
τ_0.36	0.981
τ_0.37	0.987
τ_0.38	0.988
τ_0.39	0.992
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	0.998
τ_0.55	0.998
τ_0.6	0.998
τ_0.65	0.997
τ_0.7	0.998

Poisson coef.: 0.231
Rigidity: 304 Pa*10⁸
Young module: 747 Pa*10⁸
Knoop hardness: 510
Abrasion: 104

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

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	83
100 ~ 300	101