N-LASF44 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.804199 n_e = 1.808315	V_d = 46.50 V_e = 46.25	n_F - n_C = 0.017294 n_F' - n_C' = 0.017475	Coloring: 0.40 - 0.31 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.78897105 C2 = 0.38675867 C3 = 1.30506243 C4 = 0.00872506277 C5 = 0.0308085023 C6 = 92.7743824

Refraction index
n _2.3254	1.760699
n _1.9701	1.768013
n _1.5296	1.775900
n _1.06	1.784554
n _t	1.785598
n _s	1.790064
n _r	1.796089
n _C	1.799008
n _C'	1.799829
n _0.6328	1.800598
n _D	1.804046
n _d	1.804199
n _e	1.808315
n _F	1.816302
n _F'	1.817305
n _g	1.825939
n _h	1.834050
n _i	1.848119
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7753
P_C,A'	0.3364
P_d,C	0.3001
P_e,C	0.5381
P_g,d	1.2570
P_g,F	0.5572
P_h,g	0.4690
P_i,g	1.2825
P_C',t	0.8228
P_e,C'	0.4906
P_F',e	0.5197
P_i,F'	1.7817

transmittance: 10 mm
τ_2.5	0.53
τ_2.3254	0.76
τ_1.9701	0.959
τ_1.5296	0.99
τ_1.06	0.998
τ_0.7	0.998
τ_0.66	0.998
τ_0.62	0.997
τ_0.58	0.997
τ_0.54607	0.997
τ_0.5	0.995
τ_0.46	0.99
τ_0.4358	0.983
τ_0.42	0.976
τ_0.4047	0.963
τ_0.4	0.958
τ_0.39	0.94
τ_0.38	0.91
τ_0.37	0.86
τ_0.365	0.82
τ_0.35	0.66
τ_0.3341	0.38

transmittance: 25 mm
τ_2.5	0.2
τ_2.3254	0.5
τ_1.9701	0.9
τ_1.5296	0.975
τ_1.06	0.996
τ_0.7	0.996
τ_0.66	0.994
τ_0.62	0.993
τ_0.58	0.993
τ_0.54607	0.993
τ_0.5	0.987
τ_0.46	0.974
τ_0.4358	0.959
τ_0.42	0.94
τ_0.4047	0.91
τ_0.4	0.9
τ_0.39	0.86
τ_0.38	0.79
τ_0.37	0.69
τ_0.365	0.62
τ_0.35	0.35
τ_0.3341	0.09

Density: 4.47 g/cm³
Poisson coef.: 0.293
Young module: 1240 Pa*10⁸
Knoop hardness: 770
Optical stress coef.: 1.41 1/Pa*10¹²
Abrasion: 1

Climatic resistance: 1
Staining: 1
Resistance to acids: 4.3
Resistance to alkalis: 1
Phosphate resistance: 1.3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	62
20 ~ 300	73

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		1.6
20 ~ 40		2.5
60 ~ 80		3
-40 ~ -20	e	2.6
20 ~ 40	e	3.7
60 ~ 80	e	4.4
-40 ~ -20	g	3.6
20 ~ 40	g	4.9
60 ~ 80	g	5.7

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		4
20 ~ 40		4
60 ~ 80		4.2
-40 ~ -20	e	5.1
20 ~ 40	e	5.3
60 ~ 80	e	5.6
-40 ~ -20	g	6.1
20 ~ 40	g	6.5
60 ~ 80	g	6.9