SF2 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.647689 n_e = 1.652219	V_d = 33.84 V_e = 33.59	n_F - n_C = 0.019135 n_F' - n_C' = 0.019411	Coloring: 0.37 - 0.33 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.40301821 C2 = 0.231767504 C3 = 0.939056586 C4 = 0.0105795466 C5 = 0.0493226978 C6 = 112.405955

Refraction index
n _2.3254	1.610034
n _1.9701	1.614936
n _1.5296	1.620551
n _1.06	1.627661
n _t	1.628613
n _s	1.632885
n _r	1.639020
n _C	1.642096
n _C'	1.642971
n _0.6328	1.643794
n _D	1.647522
n _d	1.647689
n _e	1.652219
n _F	1.661231
n _F'	1.662382
n _g	1.672493
n _h	1.682328
n _i	1.700269
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7045
P_C,A'	0.3172
P_d,C	0.2922
P_e,C	0.5290
P_g,d	1.2962
P_g,F	0.5885
P_h,g	0.5139
P_i,g	1.4515
P_C',t	0.7503
P_e,C'	0.4832
P_F',e	0.5311
P_i,F'	1.9799

transmittance: 10 mm
τ_2.3254	0.89
τ_1.9701	0.959
τ_1.5296	0.998
τ_1.06	0.999
τ_0.7	1
τ_0.66	0.999
τ_0.62	0.999
τ_0.58	0.999
τ_0.54607	0.999
τ_0.5	0.999
τ_0.46	0.997
τ_0.4358	0.994
τ_0.42	0.993
τ_0.4047	0.989
τ_0.4	0.988
τ_0.39	0.979
τ_0.38	0.959
τ_0.37	0.93
τ_0.365	0.91
τ_0.35	0.76
τ_0.3341	0.25

transmittance: 25 mm
τ_2.3254	0.74
τ_1.9701	0.9
τ_1.5296	0.994
τ_1.06	0.998
τ_0.7	0.999
τ_0.66	0.998
τ_0.62	0.998
τ_0.58	0.998
τ_0.54607	0.998
τ_0.5	0.997
τ_0.46	0.992
τ_0.4358	0.986
τ_0.42	0.983
τ_0.4047	0.973
τ_0.4	0.97
τ_0.39	0.95
τ_0.38	0.9
τ_0.37	0.84
τ_0.365	0.79
τ_0.35	0.5
τ_0.3341	0.03

Density: 3.86 g/cm³
Poisson coef.: 0.227
Young module: 550 Pa*10⁸
Knoop hardness: 410
Optical stress coef.: 2.62 1/Pa*10¹²
Abrasion: 2

Climatic resistance: 1
Staining: 0
Resistance to acids: 2
Resistance to alkalis: 2.3
Phosphate resistance: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	84
20 ~ 300	92

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0.1
20 ~ 40		1.3
60 ~ 80		2
-40 ~ -20	e	1.8
20 ~ 40	e	3.2
60 ~ 80	e	4.1
-40 ~ -20	g	3.7
20 ~ 40	g	5.4
60 ~ 80	g	6.4

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		2.3
20 ~ 40		2.7
60 ~ 80		3.1
-40 ~ -20	e	4
20 ~ 40	e	4.6
60 ~ 80	e	5.2
-40 ~ -20	g	6
20 ~ 40	g	6.9
60 ~ 80	g	7.6