N-LASF43 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.806099 n_e = 1.810812	V_d = 40.61 V_e = 40.36	n_F - n_C = 0.019849 n_F' - n_C' = 0.020088	Coloring: 0.42 - 0.35 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.93502827 C2 = 0.23662935 C3 = 1.26291344 C4 = 0.0104001413 C5 = 0.0447505292 C6 = 87.437569

Refraction index
n _2.3254	1.759007
n _1.9701	1.766621
n _1.5296	1.774877
n _1.06	1.784127
n _t	1.785265
n _s	1.790179
n _r	1.796909
n _C	1.800201
n _C'	1.801131
n _0.6328	1.802003
n _D	1.805925
n _d	1.806099
n _e	1.810812
n _F	1.820051
n _F'	1.821219
n _g	1.831370
n _h	1.841062
n _i	1.858288
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7524
P_C,A'	0.3296
P_d,C	0.2971
P_e,C	0.5345
P_g,d	1.2731
P_g,F	0.5702
P_h,g	0.4882
P_i,g	1.3560
P_C',t	0.7993
P_e,C'	0.4877
P_F',e	0.5242
P_i,F'	1.8674

transmittance: 10 mm
τ_2.5	0.63
τ_2.3254	0.85
τ_1.9701	0.968
τ_1.5296	0.992
τ_1.06	0.999
τ_0.7	0.999
τ_0.66	0.999
τ_0.62	0.998
τ_0.58	0.998
τ_0.54607	0.997
τ_0.5	0.994
τ_0.46	0.988
τ_0.4358	0.981
τ_0.42	0.975
τ_0.4047	0.961
τ_0.4	0.954
τ_0.39	0.93
τ_0.38	0.88
τ_0.37	0.79
τ_0.365	0.73
τ_0.35	0.37

transmittance: 25 mm
τ_2.5	0.1
τ_2.3254	0.43
τ_1.9701	0.85
τ_1.5296	0.96
τ_1.06	0.993
τ_0.7	0.995
τ_0.66	0.993
τ_0.62	0.991
τ_0.58	0.99
τ_0.54607	0.987
τ_0.5	0.972
τ_0.46	0.94
τ_0.4358	0.91
τ_0.42	0.88
τ_0.4047	0.82
τ_0.4	0.79
τ_0.39	0.69
τ_0.38	0.53
τ_0.37	0.31
τ_0.365	0.2

Density: 4.33 g/cm³
Poisson coef.: 0.29
Young module: 1140 Pa*10⁸
Knoop hardness: 720
Optical stress coef.: 1.92 1/Pa*10¹²

Climatic resistance: 1
Staining: 1
Resistance to acids: 51.3
Resistance to alkalis: 1
Phosphate resistance: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	56
20 ~ 300	67

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		2.5
20 ~ 40		3.4
60 ~ 80		4
-40 ~ -20	e	3.8
20 ~ 40	e	4.9
60 ~ 80	e	5.6
-40 ~ -20	g	5
20 ~ 40	g	6.4
60 ~ 80	g	7.4

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		4.9
20 ~ 40		5
60 ~ 80		5.2
-40 ~ -20	e	6.2
20 ~ 40	e	6.5
60 ~ 80	e	6.9
-40 ~ -20	g	7.6
20 ~ 40	g	8.1
60 ~ 80	g	8.6