LAM59 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.697002 n_e = 1.700417	V_d = 48.53 V_e = 48.24	n_F - n_C = 0.014360 n_F' - n_C' = 0.014517	Coloring: 0.34 - 0.39 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.62694497 C2 = 0.190668109 C3 = 1.28107869 C4 = 0.00875749731 C5 = 0.0377972424 C6 = 123.778354

Refraction index
n _2.3254	-----
n _1.9701	1.667841
n _1.5296	1.673969
n _1.06	1.680861
n _t	1.681706
n _s	1.685344
n _r	1.690295
n _C	1.692705
n _C'	1.693384
n _0.6328	1.694020
n _D	1.696875
n _d	1.697002
n _e	1.700417
n _F	1.707065
n _F'	1.707902
n _g	1.715121
n _h	1.721936
n _i	1.733841
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7658
P_C,A'	0.3340
P_d,C	0.2992
P_e,C	0.5370
P_g,d	1.2617
P_g,F	0.5609
P_h,g	0.4745
P_i,g	1.3035
P_C',t	0.8131
P_e,C'	0.4897
P_F',e	0.5211
P_i,F'	1.8062

transmittance: 10 mm
τ_0.34	0.04
τ_0.35	0.28
τ_0.36	0.59
τ_0.37	0.78
τ_0.38	0.88
τ_0.39	0.931
τ_0.4	0.956
τ_0.42	0.977
τ_0.44	0.984
τ_0.46	0.988
τ_0.48	0.992
τ_0.5	0.994
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	0.997
τ₁	0.996
τ_1.2	0.996
τ_1.4	0.993
τ_1.6	0.992
τ_1.8	0.983
τ₂	0.968
τ_2.2	0.921
τ_2.4	0.79

Poisson coef.: 0.286
Rigidity: 345 Pa*10⁸
Young module: 888 Pa*10⁸
Knoop hardness: 530
Abrasion: 184

Climatic resistance: 2
Resistance to acids: 53.2
Phosphate resistance: 3.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	75
100 ~ 300	90

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	0.4
-20 ~ 0	t	0.5
0 ~ 20	t	0.5
20 ~ 40	t	0.6
40 ~ 60	t	0.7
60 ~ 80	t	0.7
-40 ~ -20	C'	0.8
-20 ~ 0	C'	0.9
0 ~ 20	C'	1
20 ~ 40	C'	1.1
40 ~ 60	C'	1.2
60 ~ 80	C'	1.2
-40 ~ -20		0.9
-20 ~ 0		0.9
0 ~ 20		1
20 ~ 40		1.1
40 ~ 60		1.2
60 ~ 80		1.3
-40 ~ -20	D	1
-20 ~ 0	D	1.1
0 ~ 20	D	1.2
20 ~ 40	D	1.3
40 ~ 60	D	1.4
60 ~ 80	D	1.5
-40 ~ -20	e	1.2
-20 ~ 0	e	1.3
0 ~ 20	e	1.4
20 ~ 40	e	1.5
40 ~ 60	e	1.6
60 ~ 80	e	1.7
-40 ~ -20	F	1.7
-20 ~ 0	F	1.8
0 ~ 20	F	1.9
20 ~ 40	F	2
40 ~ 60	F	2.2
60 ~ 80	F	2.3
-40 ~ -20	g	2.1
-20 ~ 0	g	2.3
0 ~ 20	g	2.4
20 ~ 40	g	2.6
40 ~ 60	g	2.7
60 ~ 80	g	2.9