N-LASF40 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.834043 n_e = 1.839346	V_d = 37.29 V_e = 37.04	n_F - n_C = 0.022363 n_F' - n_C' = 0.022657	Coloring: 0.44 - 0.35 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.98550331 C2 = 0.274057042 C3 = 1.28945661 C4 = 0.010958331 C5 = 0.0474551603 C6 = 96.9085286

Refraction index
n _2.3254	1.786005
n _1.9701	1.792979
n _1.5296	1.800743
n _1.06	1.809993
n _t	1.811183
n _s	1.816429
n _r	1.823798
n _C	1.827450
n _C'	1.828486
n _0.6328	1.829458
n _D	1.833847
n _d	1.834043
n _e	1.839346
n _F	1.849813
n _F'	1.851144
n _g	1.862754
n _h	1.873931
n _i	1.894026
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7274
P_C,A'	0.3234
P_d,C	0.2948
P_e,C	0.5319
P_g,d	1.2838
P_g,F	0.5786
P_h,g	0.4997
P_i,g	1.3983
P_C',t	0.7737
P_e,C'	0.4856
P_F',e	0.5275
P_i,F'	1.9175

transmittance: 10 mm
τ_2.5	0.75
τ_2.3254	0.9
τ_1.9701	0.981
τ_1.5296	0.996
τ_1.06	0.999
τ_0.7	0.999
τ_0.66	0.998
τ_0.62	0.998
τ_0.58	0.998
τ_0.54607	0.997
τ_0.5	0.992
τ_0.46	0.983
τ_0.4358	0.975
τ_0.42	0.966
τ_0.4047	0.95
τ_0.4	0.94
τ_0.39	0.92
τ_0.38	0.87
τ_0.37	0.78
τ_0.365	0.68
τ_0.35	0.21

transmittance: 25 mm
τ_2.5	0.24
τ_2.3254	0.59
τ_1.9701	0.91
τ_1.5296	0.982
τ_1.06	0.995
τ_0.7	0.994
τ_0.66	0.992
τ_0.62	0.99
τ_0.58	0.988
τ_0.54607	0.983
τ_0.5	0.963
τ_0.46	0.92
τ_0.4358	0.88
τ_0.42	0.84
τ_0.4047	0.77
τ_0.4	0.74
τ_0.39	0.65
τ_0.38	0.51
τ_0.37	0.28
τ_0.365	0.15

Density: 4.55 g/cm³
Poisson coef.: 0.304
Young module: 1110 Pa*10⁸
Knoop hardness: 690
Optical stress coef.: 2.19 1/Pa*10¹²
Abrasion: 1

Climatic resistance: 1
Staining: 1
Resistance to acids: 51.2
Resistance to alkalis: 1
Phosphate resistance: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	58
20 ~ 300	69

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		4.6
20 ~ 40		5.7
60 ~ 80		6.3
-40 ~ -20	e	6.3
20 ~ 40	e	7.7
60 ~ 80	e	8.5
-40 ~ -20	g	8
20 ~ 40	g	9.8
60 ~ 80	g	10.8

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		7.1
20 ~ 40		7.3
60 ~ 80		7.6
-40 ~ -20	e	8.8
20 ~ 40	e	9.3
60 ~ 80	e	9.7
-40 ~ -20	g	10.6
20 ~ 40	g	11.4
60 ~ 80	g	12