SF15 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.698951 n_e = 1.704443	V_d = 30.06 V_e = 29.83	n_F - n_C = 0.023245 n_F' - n_C' = 0.023611	Coloring: 0.40 - 0.37 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.53925927 C2 = 0.247620926 C3 = 1.03816409 C4 = 0.0119307961 C5 = 0.0556077536 C6 = 116.416747

Refraction index
n _2.3254	1.655984
n _1.9701	1.661150
n _1.5296	1.667185
n _1.06	1.675164
n _t	1.676263
n _s	1.681254
n _r	1.688533
n _C	1.692214
n _C'	1.693265
n _0.6328	1.694254
n _D	1.698749
n _d	1.698951
n _e	1.704443
n _F	1.715460
n _F'	1.716876
n _g	1.729404
n _h	1.741756
n _i	1.764784
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6861
P_C,A'	0.3117
P_d,C	0.2898
P_e,C	0.5260
P_g,d	1.3100
P_g,F	0.5998
P_h,g	0.5314
P_i,g	1.5220
P_C',t	0.7313
P_e,C'	0.4808
P_F',e	0.5348
P_i,F'	2.0609

transmittance: 10 mm
τ_2.3254	0.89
τ_1.9701	0.963
τ_1.5296	0.992
τ_1.06	0.999
τ_0.7	0.999
τ_0.66	0.999
τ_0.62	0.999
τ_0.58	0.998
τ_0.54607	0.998
τ_0.5	0.996
τ_0.46	0.992
τ_0.4358	0.986
τ_0.42	0.976
τ_0.4047	0.94
τ_0.4	0.91
τ_0.39	0.8
τ_0.38	0.54
τ_0.37	0.16

transmittance: 25 mm
τ_2.3254	0.75
τ_1.9701	0.91
τ_1.5296	0.98
τ_1.06	0.998
τ_0.7	0.998
τ_0.66	0.998
τ_0.62	0.998
τ_0.58	0.996
τ_0.54607	0.994
τ_0.5	0.99
τ_0.46	0.98
τ_0.4358	0.965
τ_0.42	0.94
τ_0.4047	0.85
τ_0.4	0.79
τ_0.39	0.57
τ_0.38	0.21
τ_0.37	0.01

Density: 4.06 g/cm³
Poisson coef.: 0.235
Young module: 600 Pa*10⁸
Knoop hardness: 420
Optical stress coef.: 2.2 1/Pa*10¹²
Abrasion: 2

Climatic resistance: 1
Staining: 0
Resistance to acids: 1
Resistance to alkalis: 1.2
Phosphate resistance: 2.3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	79
20 ~ 300	89

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		1
20 ~ 40		2.3
60 ~ 80		2.9
-40 ~ -20	e	3
20 ~ 40	e	4.6
60 ~ 80	e	5.5
-40 ~ -20	g	5.6
20 ~ 40	g	7.6
60 ~ 80	g	8.6

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		3.3
20 ~ 40		3.8
60 ~ 80		4.1
-40 ~ -20	e	5.4
20 ~ 40	e	6.1
60 ~ 80	e	6.6
-40 ~ -20	g	8
20 ~ 40	g	9.1
60 ~ 80	g	9.8