S-LAL18 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.729156 n_e = 1.732335	V_d = 54.68 V_e = 54.45	n_F - n_C = 0.013334 n_F' - n_C' = 0.013449	Coloring: 0.29 - 0.37 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.50276318 C2 = 0.430224497 C3 = 1.3472606 C4 = 0.0145462356 C5 = -0.00332784153 C6 = 93.3508342

Refraction index
n _2.3254	-----
n _1.9701	1.697005
n _1.5296	1.705034
n _1.06	1.713188
n _t	1.714106
n _s	1.717901
n _r	1.722789
n _C	1.725100
n _C'	1.725746
n _0.6328	1.726350
n _D	1.729038
n _d	1.729156
n _e	1.732335
n _F	1.738435
n _F'	1.739195
n _g	1.745696
n _h	1.751731
n _i	1.762030
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8244
P_C,A'	0.3480
P_d,C	0.3041
P_e,C	0.5425
P_g,d	1.2403
P_g,F	0.5444
P_h,g	0.4525
P_i,g	1.2249
P_C',t	0.8728
P_e,C'	0.4941
P_F',e	0.5144
P_i,F'	1.7123

transmittance: 10 mm
τ_0.28	0.04
τ_0.29	0.21
τ_0.3	0.3
τ_0.31	0.32
τ_0.32	0.55
τ_0.33	0.68
τ_0.34	0.78
τ_0.35	0.86
τ_0.36	0.912
τ_0.37	0.946
τ_0.38	0.967
τ_0.39	0.978
τ_0.4	0.984
τ_0.42	0.991
τ_0.44	0.994
τ_0.46	0.996
τ_0.48	0.997
τ_0.5	0.998
τ_0.55	0.999
τ_0.6	0.998
τ_0.65	0.999
τ_0.7	0.999
τ_0.8	0.998
τ_0.9	0.998
τ₁	0.997
τ_1.2	0.996
τ_1.4	0.991
τ_1.6	0.991
τ_1.8	0.982
τ₂	0.956
τ_2.2	0.87
τ_2.4	0.6

Poisson coef.: 0.289
Rigidity: 467 Pa*10⁸
Young module: 1204 Pa*10⁸
Knoop hardness: 720
Abrasion: 70

Climatic resistance: 1
Resistance to acids: 51.2
Phosphate resistance: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	59
100 ~ 300	69

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	C'	3.8
-20 ~ 0	C'	3.8
0 ~ 20	C'	3.8
20 ~ 40	C'	3.9
40 ~ 60	C'	4
60 ~ 80	C'	4.2
-40 ~ -20	D	3.9
-20 ~ 0	D	3.9
0 ~ 20	D	4
20 ~ 40	D	4.1
40 ~ 60	D	4.2
60 ~ 80	D	4.4
-40 ~ -20	e	4.1
-20 ~ 0	e	4.1
0 ~ 20	e	4.2
20 ~ 40	e	4.3
40 ~ 60	e	4.4
60 ~ 80	e	4.6
-40 ~ -20	F	4.5
-20 ~ 0	F	4.5
0 ~ 20	F	4.6
20 ~ 40	F	4.7
40 ~ 60	F	4.9
60 ~ 80	F	5.1
-40 ~ -20	g	4.8
-20 ~ 0	g	4.9
0 ~ 20	g	4.9
20 ~ 40	g	5.1
40 ~ 60	g	5.3
60 ~ 80	g	5.5