S-LAH66 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.772498 n_e = 1.776207	V_d = 49.59 V_e = 49.35	n_F - n_C = 0.015575 n_F' - n_C' = 0.015726	Coloring: 0.31 - 0.38 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.39280586 C2 = 0.679577094 C3 = 1.38702069 C4 = 0.00608475118 C5 = 0.0233925351 C6 = 95.8354094

Refraction index
n _2.3254	-----
n _1.9701	1.737856
n _1.5296	1.745900
n _1.06	1.754411
n _t	1.755407
n _s	1.759598
n _r	1.765140
n _C	1.767798
n _C'	1.768544
n _0.6328	1.769241
n _D	1.772360
n _d	1.772498
n _e	1.776207
n _F	1.783373
n _F'	1.784270
n _g	1.791972
n _h	1.799173
n _i	1.811581
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7955
P_C,A'	0.3411
P_d,C	0.3017
P_e,C	0.5399
P_g,d	1.2502
P_g,F	0.5520
P_h,g	0.4623
P_i,g	1.2590
P_C',t	0.8434
P_e,C'	0.4920
P_F',e	0.5176
P_i,F'	1.7535

transmittance: 10 mm
τ_0.31	0.1
τ_0.32	0.33
τ_0.33	0.55
τ_0.34	0.71
τ_0.35	0.81
τ_0.36	0.88
τ_0.37	0.93
τ_0.38	0.956
τ_0.39	0.971
τ_0.4	0.979
τ_0.42	0.987
τ_0.44	0.991
τ_0.46	0.994
τ_0.48	0.996
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	0.998
τ_0.9	0.998
τ₁	0.998
τ_1.2	0.997
τ_1.4	0.993
τ_1.6	0.993
τ_1.8	0.983
τ₂	0.958
τ_2.2	0.88
τ_2.4	0.64

Poisson coef.: 0.291
Rigidity: 472 Pa*10⁸
Young module: 1219 Pa*10⁸
Knoop hardness: 700
Abrasion: 65

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

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	62
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	3.5
0 ~ 20	t	3.6
20 ~ 40	t	3.7
40 ~ 60	t	3.8
60 ~ 80	t	3.9
-40 ~ -20	C'	3.8
-20 ~ 0	C'	3.9
0 ~ 20	C'	4.1
20 ~ 40	C'	4.2
40 ~ 60	C'	4.4
60 ~ 80	C'	4.5
-40 ~ -20		3.8
-20 ~ 0		4
0 ~ 20		4.1
20 ~ 40		4.3
40 ~ 60		4.4
60 ~ 80		4.6
-40 ~ -20	D	4
-20 ~ 0	D	4.2
0 ~ 20	D	4.3
20 ~ 40	D	4.5
40 ~ 60	D	4.7
60 ~ 80	D	4.8
-40 ~ -20	e	4.2
-20 ~ 0	e	4.4
0 ~ 20	e	4.5
20 ~ 40	e	4.7
40 ~ 60	e	4.9
60 ~ 80	e	5
-40 ~ -20	F	4.7
-20 ~ 0	F	4.8
0 ~ 20	F	5
20 ~ 40	F	5.2
40 ~ 60	F	5.4
60 ~ 80	F	5.6
-40 ~ -20	g	5.1
-20 ~ 0	g	5.3
0 ~ 20	g	5.5
20 ~ 40	g	5.7
40 ~ 60	g	5.9
60 ~ 80	g	6.1