LAM58 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.719999 n_e = 1.724070	V_d = 41.98 V_e = 41.70	n_F - n_C = 0.017147 n_F' - n_C' = 0.017362	Coloring: 0.35 - 0.40 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.70442271 C2 = 0.177856842 C3 = 1.42572647 C4 = 0.0102493947 C5 = 0.0457681919 C6 = 153.526719

Refraction index
n _2.3254	-----
n _1.9701	1.688767
n _1.5296	1.694480
n _1.06	1.701473
n _t	1.702385
n _s	1.706421
n _r	1.712107
n _C	1.714924
n _C'	1.715722
n _0.6328	1.716471
n _D	1.719849
n _d	1.719999
n _e	1.724070
n _F	1.732071
n _F'	1.733084
n _g	1.741890
n _h	1.750303
n _i	1.765261
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7312
P_C,A'	0.3254
P_d,C	0.2959
P_e,C	0.5334
P_g,d	1.2766
P_g,F	0.5726
P_h,g	0.4906
P_i,g	1.3629
P_C',t	0.7778
P_e,C'	0.4868
P_F',e	0.5256
P_i,F'	1.8765

transmittance: 10 mm
τ_0.35	0.06
τ_0.36	0.33
τ_0.37	0.61
τ_0.38	0.79
τ_0.39	0.88
τ_0.4	0.932
τ_0.42	0.971
τ_0.44	0.981
τ_0.46	0.987
τ_0.48	0.991
τ_0.5	0.994
τ_0.55	0.998
τ_0.6	0.998
τ_0.65	0.998
τ_0.7	0.998
τ_0.8	0.999
τ_0.9	0.998
τ₁	0.999
τ_1.2	0.999
τ_1.4	0.998
τ_1.6	0.998
τ_1.8	0.993
τ₂	0.986
τ_2.2	0.966
τ_2.4	0.924

Poisson coef.: 0.282
Rigidity: 339 Pa*10⁸
Young module: 870 Pa*10⁸
Knoop hardness: 530
Abrasion: 154

Climatic resistance: 1
Resistance to acids: 5.2
Phosphate resistance: 1.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	66
100 ~ 300	77

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	4.6
-20 ~ 0	t	4.8
0 ~ 20	t	4.9
20 ~ 40	t	5
40 ~ 60	t	5.1
60 ~ 80	t	5.2
-40 ~ -20	C'	5.2
-20 ~ 0	C'	5.4
0 ~ 20	C'	5.5
20 ~ 40	C'	5.6
40 ~ 60	C'	5.8
60 ~ 80	C'	5.9
-40 ~ -20		5.2
-20 ~ 0		5.4
0 ~ 20		5.6
20 ~ 40		5.7
40 ~ 60		5.8
60 ~ 80		6
-40 ~ -20	D	5.4
-20 ~ 0	D	5.6
0 ~ 20	D	5.8
20 ~ 40	D	5.9
40 ~ 60	D	6.1
60 ~ 80	D	6.2
-40 ~ -20	e	5.8
-20 ~ 0	e	6
0 ~ 20	e	6.2
20 ~ 40	e	6.3
40 ~ 60	e	6.5
60 ~ 80	e	6.6
-40 ~ -20	F	6.6
-20 ~ 0	F	6.8
0 ~ 20	F	6.9
20 ~ 40	F	7.1
40 ~ 60	F	7.3
60 ~ 80	F	7.4
-40 ~ -20	g	7.4
-20 ~ 0	g	7.6
0 ~ 20	g	7.8
20 ~ 40	g	8
40 ~ 60	g	8.2
60 ~ 80	g	8.4