N-SF5 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.672707 n_e = 1.677634	V_d = 32.25 V_e = 31.99	n_F - n_C = 0.020858 n_F' - n_C' = 0.021176	Coloring: 0.40 - 0.36 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.52481889 C2 = 0.187085527 C3 = 1.42729015 C4 = 0.011254756 C5 = 0.0588995392 C6 = 129.141675

Refraction index
n _2.3254	1.629346
n _1.9701	1.635541
n _1.5296	1.642489
n _1.06	1.650804
n _t	1.651876
n _s	1.656610
n _r	1.663300
n _C	1.666637
n _C'	1.667587
n _0.6328	1.668479
n _D	1.672525
n _d	1.672707
n _e	1.677634
n _F	1.687496
n _F'	1.688763
n _g	1.699976
n _h	1.711061
n _i	1.731864
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7077
P_C,A'	0.3161
P_d,C	0.2909
P_e,C	0.5272
P_g,d	1.3073
P_g,F	0.5983
P_h,g	0.5314
P_i,g	1.5287
P_C',t	0.7532
P_e,C'	0.4816
P_F',e	0.5335
P_i,F'	2.0663

transmittance: 10 mm
τ_2.5	0.76
τ_2.3254	0.83
τ_1.9701	0.95
τ_1.5296	0.99
τ_1.06	0.998
τ_0.7	0.996
τ_0.66	0.995
τ_0.62	0.995
τ_0.58	0.996
τ_0.54607	0.995
τ_0.5	0.99
τ_0.46	0.982
τ_0.4358	0.973
τ_0.42	0.963
τ_0.4047	0.93
τ_0.4	0.91
τ_0.39	0.83
τ_0.38	0.64
τ_0.37	0.28

transmittance: 25 mm
τ_2.5	0.5
τ_2.3254	0.63
τ_1.9701	0.88
τ_1.5296	0.975
τ_1.06	0.994
τ_0.7	0.989
τ_0.66	0.987
τ_0.62	0.988
τ_0.58	0.991
τ_0.54607	0.988
τ_0.5	0.976
τ_0.46	0.956
τ_0.4358	0.94
τ_0.42	0.91
τ_0.4047	0.83
τ_0.4	0.78
τ_0.39	0.62
τ_0.38	0.33
τ_0.37	0.04

Density: 2.86 g/cm³
Poisson coef.: 0.237
Young module: 870 Pa*10⁸
Knoop hardness: 620
Optical stress coef.: 2.99 1/Pa*10¹²
Abrasion: 3

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

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	79
20 ~ 300	92

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-0.5
20 ~ 40		0.4
60 ~ 80		0.8
-40 ~ -20	e	0.8
20 ~ 40	e	2
60 ~ 80	e	2.5
-40 ~ -20	g	2.5
20 ~ 40	g	4
60 ~ 80	g	4.8

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		1.8
20 ~ 40		1.8
60 ~ 80		1.9
-40 ~ -20	e	3.1
20 ~ 40	e	3.4
60 ~ 80	e	3.7
-40 ~ -20	g	4.8
20 ~ 40	g	5.5
60 ~ 80	g	6