S-LAL54 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.650995 n_e = 1.653758	V_d = 56.16 V_e = 55.88	n_F - n_C = 0.011591 n_F' - n_C' = 0.011697	Coloring: 0.33 - 0.37 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.41910189 C2 = 0.258416881 C3 = 1.07385537 C4 = 0.00726647428 C5 = 0.0263842499 C6 = 102.555463

Refraction index
n _2.3254	-----
n _1.9701	1.624718
n _1.5296	1.630894
n _1.06	1.637398
n _t	1.638154
n _s	1.641326
n _r	1.645494
n _C	1.647485
n _C'	1.648042
n _0.6328	1.648564
n _D	1.650892
n _d	1.650995
n _e	1.653758
n _F	1.659076
n _F'	1.659740
n _g	1.665429
n _h	1.670729
n _i	1.679818
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8049
P_C,A'	0.3438
P_d,C	0.3028
P_e,C	0.5411
P_g,d	1.2452
P_g,F	0.5481
P_h,g	0.4572
P_i,g	1.2414
P_C',t	0.8530
P_e,C'	0.4930
P_F',e	0.5161
P_i,F'	1.7322

transmittance: 10 mm
τ_0.33	0.13
τ_0.34	0.44
τ_0.35	0.71
τ_0.36	0.85
τ_0.37	0.919
τ_0.38	0.953
τ_0.39	0.97
τ_0.4	0.98
τ_0.42	0.988
τ_0.44	0.991
τ_0.46	0.993
τ_0.48	0.995
τ_0.5	0.997
τ_0.55	0.999
τ_0.6	0.998
τ_0.65	0.998
τ_0.7	0.999
τ_0.8	0.999
τ_0.9	0.998
τ₁	0.998
τ_1.2	0.998
τ_1.4	0.993
τ_1.6	0.993
τ_1.8	0.985
τ₂	0.969
τ_2.2	0.913
τ_2.4	0.78

Poisson coef.: 0.277
Rigidity: 343 Pa*10⁸
Young module: 877 Pa*10⁸
Knoop hardness: 530
Abrasion: 171

Climatic resistance: 3
Resistance to acids: 53
Phosphate resistance: 4.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	71
100 ~ 300	83

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