SFL57 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.846663 n_e = 1.855096	V_d = 23.62 V_e = 23.43	n_F - n_C = 0.035841 n_F' - n_C' = 0.036488	Coloring: 0.51 - 0.39 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.88742326 C2 = 0.360534025 C3 = 2.26189313 C4 = 0.0145939341 C5 = 0.0648198946 C6 = 176.062211

Refraction index
n _2.3254	1.784871
n _1.9701	1.791707
n _1.5296	1.799892
n _1.06	1.811170
n _t	1.812762
n _s	1.820067
n _r	1.830894
n _C	1.836431
n _C'	1.838019
n _0.6328	1.839516
n _D	1.846354
n _d	1.846663
n _e	1.855096
n _F	1.872273
n _F'	1.874508
n _g	1.894559
n _h	1.914878
n _i	1.954481
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6604
P_C,A'	0.3031
P_d,C	0.2854
P_e,C	0.5207
P_g,d	1.3363
P_g,F	0.6217
P_h,g	0.5669
P_i,g	1.6718
P_C',t	0.7047
P_e,C'	0.4764
P_F',e	0.5416
P_i,F'	2.2313

transmittance: 10 mm
τ_2.3254	0.92
τ_1.9701	0.988
τ_1.5296	0.997
τ_1.06	0.998
τ_0.7	0.991
τ_0.66	0.988
τ_0.62	0.988
τ_0.58	0.988
τ_0.54607	0.982
τ_0.5	0.956
τ_0.46	0.91
τ_0.4358	0.85
τ_0.42	0.77
τ_0.4047	0.61
τ_0.4	0.53
τ_0.39	0.25

transmittance: 25 mm
τ_2.3254	0.81
τ_1.9701	0.97
τ_1.5296	0.993
τ_1.06	0.996
τ_0.7	0.978
τ_0.66	0.97
τ_0.62	0.971
τ_0.58	0.971
τ_0.54607	0.955
τ_0.5	0.89
τ_0.46	0.8
τ_0.4358	0.67
τ_0.42	0.52
τ_0.4047	0.29
τ_0.4	0.2
τ_0.39	0.03

Density: 3.55 g/cm³
Poisson coef.: 0.261
Young module: 970 Pa*10⁸
Knoop hardness: 580
Optical stress coef.: 2.73 1/Pa*10¹²

Climatic resistance: 1
Staining: 0
Resistance to acids: 1.3
Resistance to alkalis: 1
Phosphate resistance: 1.3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	87
20 ~ 300	100

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-2.3
20 ~ 40		-1.5
60 ~ 80		-1
-40 ~ -20	e	-0.1
20 ~ 40	e	1.2
60 ~ 80	e	2.1
-40 ~ -20	g	3
20 ~ 40	g	5.1
60 ~ 80	g	6.4

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0.1
20 ~ 40		0.1
60 ~ 80		0.2
-40 ~ -20	e	2.4
20 ~ 40	e	2.9
60 ~ 80	e	3.3
-40 ~ -20	g	5.6
20 ~ 40	g	6.8
60 ~ 80	g	7.7