N-SF1 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.717360 n_e = 1.723076	V_d = 29.62 V_e = 29.38	n_F - n_C = 0.024218 n_F' - n_C' = 0.024605	Coloring: 0.42 - 0.36 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.60865158 C2 = 0.237725916 C3 = 1.51530653 C4 = 0.0119654879 C5 = 0.0590589722 C6 = 135.521676

Refraction index
n _2.3254	1.670207
n _1.9701	1.676409
n _1.5296	1.683503
n _1.06	1.692398
n _t	1.693582
n _s	1.698886
n _r	1.706512
n _C	1.710348
n _C'	1.711442
n _0.6328	1.712472
n _D	1.717150
n _d	1.717360
n _e	1.723076
n _F	1.734567
n _F'	1.736048
n _g	1.749187
n _h	1.762235
n _i	1.786864
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6922
P_C,A'	0.3122
P_d,C	0.2894
P_e,C	0.5255
P_g,d	1.3141
P_g,F	0.6036
P_h,g	0.5387
P_i,g	1.5556
P_C',t	0.7374
P_e,C'	0.4803
P_F',e	0.5356
P_i,F'	2.0982

transmittance: 10 mm
τ_2.5	0.73
τ_2.3254	0.8
τ_1.9701	0.94
τ_1.5296	0.989
τ_1.06	0.998
τ_0.7	0.996
τ_0.66	0.994
τ_0.62	0.995
τ_0.58	0.996
τ_0.54607	0.994
τ_0.5	0.986
τ_0.46	0.973
τ_0.4358	0.959
τ_0.42	0.94
τ_0.4047	0.88
τ_0.4	0.86
τ_0.39	0.76
τ_0.38	0.57
τ_0.37	0.25

transmittance: 25 mm
τ_2.5	0.46
τ_2.3254	0.58
τ_1.9701	0.85
τ_1.5296	0.973
τ_1.06	0.995
τ_0.7	0.99
τ_0.66	0.986
τ_0.62	0.987
τ_0.58	0.99
τ_0.54607	0.986
τ_0.5	0.966
τ_0.46	0.93
τ_0.4358	0.9
τ_0.42	0.85
τ_0.4047	0.73
τ_0.4	0.68
τ_0.39	0.5
τ_0.38	0.25
τ_0.37	0.03

Density: 3.03 g/cm³
Poisson coef.: 0.25
Young module: 900 Pa*10⁸
Knoop hardness: 540
Optical stress coef.: 2.72 1/Pa*10¹²
Abrasion: 5

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	91
20 ~ 300	105

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-2.2
20 ~ 40		-1.5
60 ~ 80		-1.1
-40 ~ -20	e	-0.7
20 ~ 40	e	0.3
60 ~ 80	e	0.9
-40 ~ -20	g	1.2
20 ~ 40	g	2.7
60 ~ 80	g	3.5

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0.1
20 ~ 40		0
60 ~ 80		0
-40 ~ -20	e	1.6
20 ~ 40	e	1.8
60 ~ 80	e	2.1
-40 ~ -20	g	3.6
20 ~ 40	g	4.2
60 ~ 80	g	4.8