N-SF64 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.705908 n_e = 1.711420	V_d = 30.23 V_e = 29.99	n_F - n_C = 0.023349 n_F' - n_C' = 0.023720	Coloring: 0.42 - 0.37 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.59163762 C2 = 0.219908428 C3 = 1.46929315 C4 = 0.0118623434 C5 = 0.0594585499 C6 = 133.310762

Refraction index
n _2.3254	1.659931
n _1.9701	1.666069
n _1.5296	1.673064
n _1.06	1.681763
n _t	1.682914
n _s	1.688060
n _r	1.695436
n _C	1.699142
n _C'	1.700198
n _0.6328	1.701192
n _D	1.705705
n _d	1.705908
n _e	1.711420
n _F	1.722492
n _F'	1.723918
n _g	1.736567
n _h	1.749121
n _i	1.772812
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6949
P_C,A'	0.3129
P_d,C	0.2897
P_e,C	0.5258
P_g,d	1.3130
P_g,F	0.6028
P_h,g	0.5376
P_i,g	1.5522
P_C',t	0.7401
P_e,C'	0.4806
P_F',e	0.5352
P_i,F'	2.0939

transmittance: 10 mm
τ_2.5	0.77
τ_2.3254	0.84
τ_1.9701	0.95
τ_1.5296	0.992
τ_1.06	0.998
τ_0.7	0.994
τ_0.66	0.992
τ_0.62	0.992
τ_0.58	0.994
τ_0.54607	0.993
τ_0.5	0.984
τ_0.46	0.971
τ_0.4358	0.957
τ_0.42	0.93
τ_0.4047	0.88
τ_0.4	0.85
τ_0.39	0.75
τ_0.38	0.55
τ_0.37	0.21

transmittance: 25 mm
τ_2.5	0.52
τ_2.3254	0.64
τ_1.9701	0.88
τ_1.5296	0.979
τ_1.06	0.996
τ_0.7	0.985
τ_0.66	0.98
τ_0.62	0.981
τ_0.58	0.984
τ_0.54607	0.982
τ_0.5	0.961
τ_0.46	0.93
τ_0.4358	0.9
τ_0.42	0.84
τ_0.4047	0.73
τ_0.4	0.67
τ_0.39	0.48
τ_0.38	0.22
τ_0.37	0.02

Density: 2.99 g/cm³
Poisson coef.: 0.245
Young module: 880 Pa*10⁸
Knoop hardness: 620
Optical stress coef.: 2.95 1/Pa*10¹²
Abrasion: 4

Climatic resistance: 1
Staining: 0
Resistance to acids: 1
Resistance to alkalis: 1.2
Phosphate resistance: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	85
20 ~ 300	98

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-1.3
20 ~ 40		-0.6
60 ~ 80		-0.1
-40 ~ -20	e	0.1
20 ~ 40	e	1.2
60 ~ 80	e	1.9
-40 ~ -20	g	2
20 ~ 40	g	3.5
60 ~ 80	g	4.4

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0.9
20 ~ 40		0.9
60 ~ 80		1
-40 ~ -20	e	2.4
20 ~ 40	e	2.7
60 ~ 80	e	3
-40 ~ -20	g	4.4
20 ~ 40	g	5.1
60 ~ 80	g	5.6