S-LAL 8 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.712994 n_e = 1.716149	V_d = 53.86 V_e = 53.63	n_F - n_C = 0.013236 n_F' - n_C' = 0.013352	Coloring: 0.30 - 0.38 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.30663291 C2 = 0.571377253 C3 = 1.24303605 C4 = 0.00611862448 C5 = 0.021272147 C6 = 90.6285686

Refraction index
n _2.3254	-----
n _1.9701	1.681548
n _1.5296	1.689301
n _1.06	1.697228
n _t	1.698128
n _s	1.701857
n _r	1.706685
n _C	1.708973
n _C'	1.709613
n _0.6328	1.710211
n _D	1.712877
n _d	1.712994
n _e	1.716149
n _F	1.722210
n _F'	1.722965
n _g	1.729434
n _h	1.735450
n _i	1.745746
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8193
P_C,A'	0.3468
P_d,C	0.3037
P_e,C	0.5421
P_g,d	1.2420
P_g,F	0.5458
P_h,g	0.4544
P_i,g	1.2323
P_C',t	0.8677
P_e,C'	0.4937
P_F',e	0.5149
P_i,F'	1.7210

transmittance: 10 mm
τ_0.29	0.03
τ_0.3	0.07
τ_0.31	0.15
τ_0.32	0.28
τ_0.33	0.44
τ_0.34	0.6
τ_0.35	0.74
τ_0.36	0.84
τ_0.37	0.905
τ_0.38	0.944
τ_0.39	0.965
τ_0.4	0.977
τ_0.42	0.988
τ_0.44	0.991
τ_0.46	0.994
τ_0.48	0.996
τ_0.5	0.997
τ_0.55	0.998
τ_0.6	0.996
τ_0.65	0.997
τ_0.7	0.997
τ_0.8	0.998
τ_0.9	0.997
τ₁	0.997
τ_1.2	0.997
τ_1.4	0.991
τ_1.6	0.991
τ_1.8	0.981
τ₂	0.955
τ_2.2	0.87
τ_2.4	0.62

Poisson coef.: 0.289
Rigidity: 442 Pa*10⁸
Young module: 1140 Pa*10⁸
Knoop hardness: 660
Abrasion: 81

Climatic resistance: 3
Resistance to acids: 52
Phosphate resistance: 3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	61
100 ~ 300	74

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	3.3
-20 ~ 0	t	3.4
0 ~ 20	t	3.5
20 ~ 40	t	3.6
40 ~ 60	t	3.6
60 ~ 80	t	3.7
-40 ~ -20	C'	3.6
-20 ~ 0	C'	3.7
0 ~ 20	C'	3.9
20 ~ 40	C'	4
40 ~ 60	C'	4.1
60 ~ 80	C'	4.2
-40 ~ -20		3.6
-20 ~ 0		3.8
0 ~ 20		3.9
20 ~ 40		4
40 ~ 60		4.1
60 ~ 80		4.2
-40 ~ -20	D	3.8
-20 ~ 0	D	3.9
0 ~ 20	D	4
20 ~ 40	D	4.1
40 ~ 60	D	4.3
60 ~ 80	D	4.4
-40 ~ -20	e	4
-20 ~ 0	e	4.1
0 ~ 20	e	4.2
20 ~ 40	e	4.3
40 ~ 60	e	4.5
60 ~ 80	e	4.6
-40 ~ -20	F	4.3
-20 ~ 0	F	4.5
0 ~ 20	F	4.6
20 ~ 40	F	4.8
40 ~ 60	F	4.9
60 ~ 80	F	5.1
-40 ~ -20	g	4.7
-20 ~ 0	g	4.9
0 ~ 20	g	5
20 ~ 40	g	5.2
40 ~ 60	g	5.4
60 ~ 80	g	5.5