N-LASF41 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.835010 n_e = 1.839613	V_d = 43.12 V_e = 42.88	n_F - n_C = 0.019360 n_F' - n_C' = 0.019578	Coloring: 0.41 - 0.32 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.86348331 C2 = 0.413307255 C3 = 1.35784815 C4 = 0.00910368219 C5 = 0.0339247268 C6 = 93.3580595

Refraction index
n _2.3254	1.788590
n _1.9701	1.796083
n _1.5296	1.804230
n _1.06	1.813377
n _t	1.814502
n _s	1.819358
n _r	1.825991
n _C	1.829228
n _C'	1.830140
n _0.6328	1.830996
n _D	1.834839
n _d	1.835010
n _e	1.839613
n _F	1.848588
n _F'	1.849719
n _g	1.859487
n _h	1.868719
n _i	1.884861
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7605
P_C,A'	0.3325
P_d,C	0.2986
P_e,C	0.5364
P_g,d	1.2642
P_g,F	0.5629
P_h,g	0.4768
P_i,g	1.3105
P_C',t	0.8077
P_e,C'	0.4892
P_F',e	0.5219
P_i,F'	1.8151

transmittance: 10 mm
τ_2.5	0.75
τ_2.3254	0.91
τ_1.9701	0.986
τ_1.5296	0.998
τ_1.06	0.998
τ_0.7	0.999
τ_0.66	0.999
τ_0.62	0.998
τ_0.58	0.998
τ_0.54607	0.998
τ_0.5	0.996
τ_0.46	0.991
τ_0.4358	0.987
τ_0.42	0.983
τ_0.4047	0.977
τ_0.4	0.973
τ_0.39	0.963
τ_0.38	0.94
τ_0.37	0.91
τ_0.365	0.89
τ_0.35	0.77
τ_0.3341	0.54
τ_0.32	0.2

transmittance: 25 mm
τ_2.5	0.24
τ_2.3254	0.62
τ_1.9701	0.93
τ_1.5296	0.988
τ_1.06	0.992
τ_0.7	0.993
τ_0.66	0.993
τ_0.62	0.992
τ_0.58	0.991
τ_0.54607	0.99
τ_0.5	0.978
τ_0.46	0.954
τ_0.4358	0.94
τ_0.42	0.92
τ_0.4047	0.89
τ_0.4	0.87
τ_0.39	0.83
τ_0.38	0.75
τ_0.37	0.63
τ_0.365	0.55
τ_0.35	0.27
τ_0.3341	0.04

Density: 4.93 g/cm³
Poisson coef.: 0.294
Young module: 1240 Pa*10⁸
Knoop hardness: 760
Optical stress coef.: 1.57 1/Pa*10¹²
Abrasion: 1

Climatic resistance: 1
Staining: 0
Resistance to acids: 4
Resistance to alkalis: 1
Phosphate resistance: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	62
20 ~ 300	72

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		1.5
20 ~ 40		2.4
60 ~ 80		2.9
-40 ~ -20	e	2.7
20 ~ 40	e	3.8
60 ~ 80	e	4.5
-40 ~ -20	g	3.9
20 ~ 40	g	5.2
60 ~ 80	g	6

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	5.2
20 ~ 40	e	5.4
60 ~ 80	e	5.7
-40 ~ -20	g	6.4
20 ~ 40	g	6.8
60 ~ 80	g	7.2