S-LAL12 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.677899 n_e = 1.680819	V_d = 55.34 V_e = 55.07	n_F - n_C = 0.012249 n_F' - n_C' = 0.012360	Coloring: 0.28 - 0.36 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 0.992053895 C2 = 0.771377731 C3 = 1.18296264 C4 = 0.0167095063 C5 = 0.00236750156 C6 = 105.90108

Refraction index
n _2.3254	-----
n _1.9701	1.650208
n _1.5296	1.656690
n _1.06	1.663535
n _t	1.664332
n _s	1.667679
n _r	1.672083
n _C	1.674188
n _C'	1.674778
n _0.6328	1.675329
n _D	1.677790
n _d	1.677899
n _e	1.680819
n _F	1.686437
n _F'	1.687138
n _g	1.693141
n _h	1.698721
n _i	1.708260
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8045
P_C,A'	0.3438
P_d,C	0.3029
P_e,C	0.5413
P_g,d	1.2442
P_g,F	0.5472
P_h,g	0.4555
P_i,g	1.2342
P_C',t	0.8527
P_e,C'	0.4932
P_F',e	0.5158
P_i,F'	1.7242

transmittance: 10 mm
τ_0.28	0.06
τ_0.29	0.15
τ_0.3	0.29
τ_0.31	0.45
τ_0.32	0.61
τ_0.33	0.73
τ_0.34	0.83
τ_0.35	0.89
τ_0.36	0.938
τ_0.37	0.962
τ_0.38	0.976
τ_0.39	0.984
τ_0.4	0.988
τ_0.42	0.992
τ_0.44	0.994
τ_0.46	0.995
τ_0.48	0.997
τ_0.5	0.998
τ_0.55	0.999
τ_0.6	0.998
τ_0.65	0.998
τ_0.7	0.998
τ_0.8	0.999
τ_0.9	0.997
τ₁	0.996
τ_1.2	0.996
τ_1.4	0.991
τ_1.6	0.991
τ_1.8	0.981
τ₂	0.963
τ_2.2	0.901
τ_2.4	0.73

Poisson coef.: 0.284
Rigidity: 354 Pa*10⁸
Young module: 910 Pa*10⁸
Knoop hardness: 560
Abrasion: 166

Climatic resistance: 2
Resistance to acids: 53
Phosphate resistance: 4.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	72
100 ~ 300	86

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	0.5
40 ~ 60	t	0.5
60 ~ 80	t	0.6
-40 ~ -20	C'	0.6
-20 ~ 0	C'	0.7
0 ~ 20	C'	0.8
20 ~ 40	C'	0.8
40 ~ 60	C'	0.9
60 ~ 80	C'	1
-40 ~ -20		0.7
-20 ~ 0		0.7
0 ~ 20		0.8
20 ~ 40		0.9
40 ~ 60		0.9
60 ~ 80		1
-40 ~ -20	D	0.8
-20 ~ 0	D	0.8
0 ~ 20	D	0.9
20 ~ 40	D	1
40 ~ 60	D	1.1
60 ~ 80	D	1.1
-40 ~ -20	e	0.9
-20 ~ 0	e	1
0 ~ 20	e	1.1
20 ~ 40	e	1.1
40 ~ 60	e	1.2
60 ~ 80	e	1.3
-40 ~ -20	F	1.2
-20 ~ 0	F	1.3
0 ~ 20	F	1.4
20 ~ 40	F	1.5
40 ~ 60	F	1.6
60 ~ 80	F	1.7
-40 ~ -20	g	1.5
-20 ~ 0	g	1.7
0 ~ 20	g	1.8
20 ~ 40	g	1.9
40 ~ 60	g	2
60 ~ 80	g	2.1