S-LAL56 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.677897 n_e = 1.681079	V_d = 50.72 V_e = 50.44	n_F - n_C = 0.013364 n_F' - n_C' = 0.013502	Coloring: 0.33 - 0.38 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.54052 C2 = 0.217748704 C3 = 1.30456122 C4 = 0.00826765101 C5 = 0.0328533726 C6 = 124.527479

Refraction index
n _2.3254	-----
n _1.9701	1.649680
n _1.5296	1.655854
n _1.06	1.662639
n _t	1.663455
n _s	1.666937
n _r	1.671617
n _C	1.673879
n _C'	1.674515
n _0.6328	1.675111
n _D	1.677779
n _d	1.677897
n _e	1.681079
n _F	1.687244
n _F'	1.688017
n _g	1.694672
n _h	1.700918
n _i	1.711740
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7799
P_C,A'	0.3376
P_d,C	0.3006
P_e,C	0.5386
P_g,d	1.2551
P_g,F	0.5557
P_h,g	0.4673
P_i,g	1.2770
P_C',t	0.8275
P_e,C'	0.4910
P_F',e	0.5191
P_i,F'	1.7749

transmittance: 10 mm
τ_0.33	0.01
τ_0.34	0.18
τ_0.35	0.51
τ_0.36	0.74
τ_0.37	0.86
τ_0.38	0.928
τ_0.39	0.958
τ_0.4	0.975
τ_0.42	0.986
τ_0.44	0.99
τ_0.46	0.993
τ_0.48	0.995
τ_0.5	0.997
τ_0.55	0.998
τ_0.6	0.997
τ_0.65	0.997
τ_0.7	0.998
τ_0.8	0.999
τ_0.9	0.998
τ₁	0.998
τ_1.2	0.997
τ_1.4	0.993
τ_1.6	0.993
τ_1.8	0.986
τ₂	0.973
τ_2.2	0.928
τ_2.4	0.81

Poisson coef.: 0.28
Rigidity: 356 Pa*10⁸
Young module: 911 Pa*10⁸
Knoop hardness: 540
Abrasion: 147

Climatic resistance: 2
Resistance to acids: 51
Phosphate resistance: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	66
100 ~ 300	76

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	2.8
-20 ~ 0	t	2.9
0 ~ 20	t	3
20 ~ 40	t	3.1
40 ~ 60	t	3.2
60 ~ 80	t	3.3
-40 ~ -20	C'	3.2
-20 ~ 0	C'	3.3
0 ~ 20	C'	3.4
20 ~ 40	C'	3.5
40 ~ 60	C'	3.6
60 ~ 80	C'	3.8
-40 ~ -20		3.2
-20 ~ 0		3.4
0 ~ 20		3.5
20 ~ 40		3.6
40 ~ 60		3.7
60 ~ 80		3.8
-40 ~ -20	D	3.3
-20 ~ 0	D	3.5
0 ~ 20	D	3.6
20 ~ 40	D	3.7
40 ~ 60	D	3.8
60 ~ 80	D	4
-40 ~ -20	e	3.6
-20 ~ 0	e	3.7
0 ~ 20	e	3.8
20 ~ 40	e	4
40 ~ 60	e	4.1
60 ~ 80	e	4.2
-40 ~ -20	F	4
-20 ~ 0	F	4.1
0 ~ 20	F	4.3
20 ~ 40	F	4.4
40 ~ 60	F	4.6
60 ~ 80	F	4.7
-40 ~ -20	g	4.4
-20 ~ 0	g	4.6
0 ~ 20	g	4.8
20 ~ 40	g	4.9
40 ~ 60	g	5.1
60 ~ 80	g	5.3