LAM61 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.720001 n_e = 1.723720	V_d = 46.03 V_e = 45.74	n_F - n_C = 0.015640 n_F' - n_C' = 0.015821	Coloring: 0.34 - 0.39 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.70602421 C2 = 0.18271603 C3 = 1.20483299 C4 = 0.00957977142 C5 = 0.0404409651 C6 = 127.570994

Refraction index
n _2.3254	-----
n _1.9701	1.690289
n _1.5296	1.696012
n _1.06	1.702799
n _t	1.703665
n _s	1.707463
n _r	1.712745
n _C	1.715343
n _C'	1.716077
n _0.6328	1.716766
n _D	1.719863
n _d	1.720001
n _e	1.723720
n _F	1.730983
n _F'	1.731899
n _g	1.739820
n _h	1.747320
n _i	1.760476
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7466
P_C,A'	0.3297
P_d,C	0.2978
P_e,C	0.5355
P_g,d	1.2671
P_g,F	0.5650
P_h,g	0.4795
P_i,g	1.3207
P_C',t	0.7935
P_e,C'	0.4886
P_F',e	0.5229
P_i,F'	1.8271

transmittance: 10 mm
τ_0.34	0.03
τ_0.35	0.24
τ_0.36	0.54
τ_0.37	0.75
τ_0.38	0.86
τ_0.39	0.926
τ_0.4	0.954
τ_0.42	0.977
τ_0.44	0.984
τ_0.46	0.989
τ_0.48	0.992
τ_0.5	0.995
τ_0.55	0.998
τ_0.6	0.997
τ_0.65	0.996
τ_0.7	0.997
τ_0.8	0.998
τ_0.9	0.998
τ₁	0.997
τ_1.2	0.997
τ_1.4	0.995
τ_1.6	0.993
τ_1.8	0.984
τ₂	0.968
τ_2.2	0.931
τ_2.4	0.83

Poisson coef.: 0.294
Rigidity: 330 Pa*10⁸
Young module: 855 Pa*10⁸
Knoop hardness: 520
Abrasion: 203

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	85
100 ~ 300	96

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	-0.5
-20 ~ 0	t	-0.5
0 ~ 20	t	-0.4
20 ~ 40	t	-0.2
60 ~ 80	t	0.1
-40 ~ -20	C'	0.3
-20 ~ 0	C'	0.3
0 ~ 20	C'	0.3
20 ~ 40	C'	0.3
40 ~ 60	C'	0.4
60 ~ 80	C'	0.6
-40 ~ -20		0.3
-20 ~ 0		0.3
0 ~ 20		0.3
20 ~ 40		0.4
40 ~ 60		0.5
60 ~ 80		0.7
-40 ~ -20	D	0.5
-20 ~ 0	D	0.5
0 ~ 20	D	0.5
20 ~ 40	D	0.6
40 ~ 60	D	0.8
60 ~ 80	D	1
-40 ~ -20	e	0.8
-20 ~ 0	e	0.8
0 ~ 20	e	0.8
20 ~ 40	e	0.9
40 ~ 60	e	1
60 ~ 80	e	1.2
-40 ~ -20	F	1.3
-20 ~ 0	F	1.3
0 ~ 20	F	1.4
20 ~ 40	F	1.5
40 ~ 60	F	1.7
60 ~ 80	F	1.8
-40 ~ -20	g	1.9
-20 ~ 0	g	1.9
0 ~ 20	g	2
20 ~ 40	g	2.1
40 ~ 60	g	2.3
60 ~ 80	g	2.5