L-LAL12 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.677900 n_e = 1.680843	V_d = 54.89 V_e = 54.65	n_F - n_C = 0.012348 n_F' - n_C' = 0.012456	Coloring: 0.30 - 0.37 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.2475175 C2 = 0.516297777 C3 = 1.51522998 C4 = 0.0152314253 C5 = -0.00116657708 C6 = 121.77369

Refraction index
n _2.3254	-----
n _1.9701	1.648845
n _1.5296	1.655913
n _1.06	1.663223
n _t	1.664057
n _s	1.667521
n _r	1.672016
n _C	1.674149
n _C'	1.674746
n _0.6328	1.675304
n _D	1.677790
n _d	1.677900
n _e	1.680843
n _F	1.686498
n _F'	1.687203
n _g	1.693236
n _h	1.698842
n _i	1.708419
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8173
P_C,A'	0.3464
P_d,C	0.3037
P_e,C	0.5420
P_g,d	1.2419
P_g,F	0.5457
P_h,g	0.4539
P_i,g	1.2295
P_C',t	0.8656
P_e,C'	0.4937
P_F',e	0.5150
P_i,F'	1.7181

transmittance: 10 mm
τ_0.29	0.01
τ_0.3	0.04
τ_0.31	0.11
τ_0.32	0.24
τ_0.33	0.42
τ_0.34	0.61
τ_0.35	0.76
τ_0.36	0.86
τ_0.37	0.923
τ_0.38	0.954
τ_0.39	0.971
τ_0.4	0.979
τ_0.42	0.986
τ_0.44	0.988
τ_0.46	0.991
τ_0.48	0.994
τ_0.5	0.996
τ_0.55	0.997
τ_0.6	0.996
τ_0.65	0.996
τ_0.7	0.997
τ_0.8	0.998
τ_0.9	0.998

Poisson coef.: 0.277
Rigidity: 372 Pa*10⁸
Young module: 950 Pa*10⁸
Knoop hardness: 610
Abrasion: 134

Climatic resistance: 2
Resistance to acids: 53.2
Phosphate resistance: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	76
100 ~ 300	90