L-LAM69 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.730769 n_e = 1.735050	V_d = 40.50 V_e = 40.25	n_F - n_C = 0.018040 n_F' - n_C' = 0.018261	Coloring: 0.34 - 0.41 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.7403896 C2 = 0.176996917 C3 = 1.76775413 C4 = 0.010339887 C5 = 0.0484822765 C6 = 136.671996

Refraction index
n _2.3254	-----
n _1.9701	1.694876
n _1.5296	1.702371
n _1.06	1.710812
n _t	1.711848
n _s	1.716318
n _r	1.722428
n _C	1.725415
n _C'	1.726259
n _0.6328	1.727050
n _D	1.730610
n _d	1.730769
n _e	1.735050
n _F	1.743455
n _F'	1.744520
n _g	1.753788
n _h	1.762673
n _i	1.778577
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7520
P_C,A'	0.3291
P_d,C	0.2967
P_e,C	0.5340
P_g,d	1.2760
P_g,F	0.5727
P_h,g	0.4925
P_i,g	1.3741
P_C',t	0.7988
P_e,C'	0.4873
P_F',e	0.5249
P_i,F'	1.8878

transmittance: 10 mm
τ_0.34	0.02
τ_0.35	0.22
τ_0.36	0.5
τ_0.37	0.7
τ_0.38	0.81
τ_0.39	0.87
τ_0.4	0.912
τ_0.42	0.95
τ_0.44	0.964
τ_0.46	0.974
τ_0.48	0.982
τ_0.5	0.989
τ_0.55	0.996
τ_0.6	0.994
τ_0.65	0.995
τ_0.7	0.998
τ_0.8	0.998
τ_0.9	0.998

Poisson coef.: 0.273
Rigidity: 445 Pa*10⁸
Young module: 1133 Pa*10⁸
Knoop hardness: 630
Abrasion: 118

Climatic resistance: 2
Resistance to acids: 52.2
Phosphate resistance: 3.1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	86
100 ~ 300	105

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	C'	2.8
-20 ~ 0	C'	2.8
0 ~ 20	C'	2.8
20 ~ 40	C'	2.8
40 ~ 60	C'	2.8
60 ~ 80	C'	2.8
-40 ~ -20		2.8
-20 ~ 0		2.8
0 ~ 20		2.8
20 ~ 40		2.9
40 ~ 60		2.9
60 ~ 80		2.9
-40 ~ -20	D	3
-20 ~ 0	D	3.1
0 ~ 20	D	3.1
20 ~ 40	D	3.1
40 ~ 60	D	3.1
60 ~ 80	D	3.1
-40 ~ -20	e	3.3
-20 ~ 0	e	3.4
0 ~ 20	e	3.4
20 ~ 40	e	3.4
40 ~ 60	e	3.5
60 ~ 80	e	3.5
-40 ~ -20	F	4
-20 ~ 0	F	4
0 ~ 20	F	4.1
20 ~ 40	F	4.2
40 ~ 60	F	4.3
60 ~ 80	F	4.3
-40 ~ -20	g	4.7
-20 ~ 0	g	4.8
0 ~ 20	g	4.9
20 ~ 40	g	5
40 ~ 60	g	5.1
60 ~ 80	g	5.3