S-LAL61 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.740998 n_e = 1.744353	V_d = 52.63 V_e = 52.40	n_F - n_C = 0.014077 n_F' - n_C' = 0.014202	Coloring: 0.29 - 0.37 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.11073292 C2 = 0.859347773 C3 = 1.26707433 C4 = 0.00464181248 C5 = 0.0192989261 C6 = 87.3917698

Refraction index
n _2.3254	-----
n _1.9701	1.707868
n _1.5296	1.715977
n _1.06	1.724297
n _t	1.725245
n _s	1.729183
n _r	1.734297
n _C	1.736726
n _C'	1.737406
n _0.6328	1.738041
n _D	1.740873
n _d	1.740998
n _e	1.744353
n _F	1.750804
n _F'	1.751609
n _g	1.758501
n _h	1.764913
n _i	1.775893
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8155
P_C,A'	0.3459
P_d,C	0.3034
P_e,C	0.5417
P_g,d	1.2432
P_g,F	0.5467
P_h,g	0.4555
P_i,g	1.2354
P_C',t	0.8638
P_e,C'	0.4935
P_F',e	0.5153
P_i,F'	1.7250

transmittance: 10 mm
τ_0.29	0.02
τ_0.3	0.07
τ_0.31	0.15
τ_0.32	0.27
τ_0.33	0.43
τ_0.34	0.59
τ_0.35	0.72
τ_0.36	0.82
τ_0.37	0.89
τ_0.38	0.935
τ_0.39	0.958
τ_0.4	0.971
τ_0.42	0.982
τ_0.44	0.988
τ_0.46	0.991
τ_0.48	0.994
τ_0.5	0.996
τ_0.55	0.997
τ_0.6	0.997
τ_0.65	0.997
τ_0.7	0.998
τ_0.8	0.998
τ_0.9	0.998
τ₁	0.998
τ_1.2	0.998
τ_1.4	0.994
τ_1.6	0.994
τ_1.8	0.985
τ₂	0.959
τ_2.2	0.88
τ_2.4	0.62

Poisson coef.: 0.291
Rigidity: 461 Pa*10⁸
Young module: 1190 Pa*10⁸
Knoop hardness: 720
Abrasion: 65

Climatic resistance: 1
Resistance to acids: 51
Phosphate resistance: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	57
100 ~ 300	70

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	3.7
60 ~ 80	t	3.8
-40 ~ -20	C'	3.7
-20 ~ 0	C'	3.8
0 ~ 20	C'	3.9
20 ~ 40	C'	4.1
40 ~ 60	C'	4.2
60 ~ 80	C'	4.3
-40 ~ -20		3.7
-20 ~ 0		3.9
0 ~ 20		4
20 ~ 40		4.1
40 ~ 60		4.2
60 ~ 80		4.3
-40 ~ -20	D	3.9
-20 ~ 0	D	4
0 ~ 20	D	4.1
20 ~ 40	D	4.2
40 ~ 60	D	4.4
60 ~ 80	D	4.5
-40 ~ -20	e	4
-20 ~ 0	e	4.2
0 ~ 20	e	4.3
20 ~ 40	e	4.4
40 ~ 60	e	4.6
60 ~ 80	e	4.7
-40 ~ -20	F	4.4
-20 ~ 0	F	4.6
0 ~ 20	F	4.7
20 ~ 40	F	4.9
40 ~ 60	F	5
60 ~ 80	F	5.2
-40 ~ -20	g	4.8
-20 ~ 0	g	5
0 ~ 20	g	5.1
20 ~ 40	g	5.3
40 ~ 60	g	5.5
60 ~ 80	g	5.6