S-LAL 9 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.691001 n_e = 1.694006	V_d = 54.82 V_e = 54.59	n_F - n_C = 0.012604 n_F' - n_C' = 0.012712	Coloring: 0.30 - 0.38 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.16195687 C2 = 0.644860099 C3 = 1.25062221 C4 = 0.0159659509 C5 = 0.000505502467 C6 = 93.8284169

Refraction index
n _2.3254	-----
n _1.9701	1.660642
n _1.5296	1.668219
n _1.06	1.675917
n _t	1.676784
n _s	1.680368
n _r	1.684985
n _C	1.687169
n _C'	1.687779
n _0.6328	1.688349
n _D	1.690889
n _d	1.691001
n _e	1.694006
n _F	1.699773
n _F'	1.700492
n _g	1.706642
n _h	1.712356
n _i	1.722118
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8238
P_C,A'	0.3478
P_d,C	0.3040
P_e,C	0.5424
P_g,d	1.2408
P_g,F	0.5449
P_h,g	0.4532
P_i,g	1.2278
P_C',t	0.8723
P_e,C'	0.4940
P_F',e	0.5146
P_i,F'	1.7157

transmittance: 10 mm
τ_0.29	0.01
τ_0.3	0.04
τ_0.31	0.11
τ_0.32	0.22
τ_0.33	0.38
τ_0.34	0.55
τ_0.35	0.7
τ_0.36	0.82
τ_0.37	0.89
τ_0.38	0.936
τ_0.39	0.96
τ_0.4	0.973
τ_0.42	0.985
τ_0.44	0.988
τ_0.46	0.992
τ_0.48	0.994
τ_0.5	0.995
τ_0.55	0.997
τ_0.6	0.996
τ_0.65	0.997
τ_0.7	0.998
τ_0.8	0.998
τ_0.9	0.997
τ₁	0.996
τ_1.2	0.996
τ_1.4	0.992
τ_1.6	0.992
τ_1.8	0.984
τ₂	0.963
τ_2.2	0.89
τ_2.4	0.66

Poisson coef.: 0.287
Rigidity: 418 Pa*10⁸
Young module: 1075 Pa*10⁸
Knoop hardness: 660
Abrasion: 88

Climatic resistance: 2
Resistance to acids: 52
Phosphate resistance: 4

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	3.4
-20 ~ 0	t	3.4
0 ~ 20	t	3.5
20 ~ 40	t	3.5
40 ~ 60	t	3.6
60 ~ 80	t	3.7
-40 ~ -20	C'	3.8
-20 ~ 0	C'	3.8
0 ~ 20	C'	3.9
20 ~ 40	C'	3.9
40 ~ 60	C'	4
60 ~ 80	C'	4
-40 ~ -20		3.8
-20 ~ 0		3.8
0 ~ 20		3.9
20 ~ 40		3.9
40 ~ 60		4
60 ~ 80		4
-40 ~ -20	D	3.9
-20 ~ 0	D	4
0 ~ 20	D	4
20 ~ 40	D	4.1
40 ~ 60	D	4.2
60 ~ 80	D	4.2
-40 ~ -20	e	4.1
-20 ~ 0	e	4.1
0 ~ 20	e	4.2
20 ~ 40	e	4.3
40 ~ 60	e	4.3
60 ~ 80	e	4.4
-40 ~ -20	F	4.4
-20 ~ 0	F	4.5
0 ~ 20	F	4.6
20 ~ 40	F	4.7
40 ~ 60	F	4.8
60 ~ 80	F	4.8
-40 ~ -20	g	4.8
-20 ~ 0	g	4.9
0 ~ 20	g	5
20 ~ 40	g	5.1
40 ~ 60	g	5.2
60 ~ 80	g	5.3