LASFN9 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.850254 n_e = 1.856506	V_d = 32.16 V_e = 31.92	n_F - n_C = 0.026430 n_F' - n_C' = 0.026827	Coloring: 0.50 - 0.36 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.97888194 C2 = 0.320435298 C3 = 1.92900751 C4 = 0.0118537266 C5 = 0.052738177 C6 = 166.25654

Refraction index
n _2.3254	1.800547
n _1.9701	1.806566
n _1.5296	1.813628
n _1.06	1.822929
n _t	1.824203
n _s	1.829971
n _r	1.838340
n _C	1.842559
n _C'	1.843761
n _0.6328	1.844892
n _D	1.850024
n _d	1.850254
n _e	1.856506
n _F	1.868989
n _F'	1.870588
n _g	1.884669
n _h	1.898441
n _i	1.923786
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6944
P_C,A'	0.3145
P_d,C	0.2911
P_e,C	0.5277
P_g,d	1.3021
P_g,F	0.5932
P_h,g	0.5210
P_i,g	1.4800
P_C',t	0.7399
P_e,C'	0.4822
P_F',e	0.5327
P_i,F'	2.0127

transmittance: 10 mm
τ_2.3254	0.95
τ_1.9701	0.987
τ_1.5296	0.996
τ_1.06	0.996
τ_0.7	0.996
τ_0.66	0.994
τ_0.62	0.993
τ_0.58	0.99
τ_0.54607	0.984
τ_0.5	0.963
τ_0.46	0.93
τ_0.4358	0.89
τ_0.42	0.85
τ_0.4047	0.77
τ_0.4	0.74
τ_0.39	0.65
τ_0.38	0.5
τ_0.37	0.3

transmittance: 25 mm
τ_2.3254	0.88
τ_1.9701	0.968
τ_1.5296	0.99
τ_1.06	0.99
τ_0.7	0.99
τ_0.66	0.986
τ_0.62	0.983
τ_0.58	0.975
τ_0.54607	0.96
τ_0.5	0.91
τ_0.46	0.83
τ_0.4358	0.75
τ_0.42	0.66
τ_0.4047	0.52
τ_0.4	0.47
τ_0.39	0.34
τ_0.38	0.18
τ_0.37	0.05

Density: 4.44 g/cm³
Poisson coef.: 0.286
Young module: 1090 Pa*10⁸
Knoop hardness: 630
Optical stress coef.: 1.76 1/Pa*10¹²

Climatic resistance: 2
Staining: 0
Resistance to acids: 2
Resistance to alkalis: 1
Phosphate resistance: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	74
20 ~ 300	84

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0.3
20 ~ 40		1.3
60 ~ 80		1.9
-40 ~ -20	e	2
20 ~ 40	e	3.4
60 ~ 80	e	4.2
-40 ~ -20	g	4.1
20 ~ 40	g	5.9
60 ~ 80	g	7

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		2.7
20 ~ 40		2.9
60 ~ 80		3.1
-40 ~ -20	e	4.6
20 ~ 40	e	5.1
60 ~ 80	e	5.5
-40 ~ -20	g	6.7
20 ~ 40	g	7.6
60 ~ 80	g	8.3