SK51 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.620900 n_e = 1.623354	V_d = 60.31 V_e = 60.01	n_F - n_C = 0.010294 n_F' - n_C' = 0.010385	Coloring: 0.36 - 0.31 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.44112715 C2 = 0.143968387 C3 = 0.881989862 C4 = 0.00758546975 C5 = 0.0287396017 C6 = 94.6838154

Refraction index
n _2.3254	1.592000
n _1.9701	1.597276
n _1.5296	1.602880
n _1.06	1.608750
n _t	1.609429
n _s	1.612273
n _r	1.615999
n _C	1.617774
n _C'	1.618271
n _0.6328	1.618736
n _D	1.620808
n _d	1.620900
n _e	1.623354
n _F	1.628069
n _F'	1.628657
n _g	1.633686
n _h	1.638358
n _i	1.646344
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8105
P_C,A'	0.3454
P_d,C	0.3035
P_e,C	0.5419
P_g,d	1.2419
P_g,F	0.5455
P_h,g	0.4537
P_i,g	1.2294
P_C',t	0.8588
P_e,C'	0.4937
P_F',e	0.5151
P_i,F'	1.7179

transmittance: 10 mm
τ_2.5	0.59
τ_2.3254	0.77
τ_1.9701	0.93
τ_1.5296	0.983
τ_1.06	0.997
τ_0.7	0.997
τ_0.66	0.997
τ_0.62	0.997
τ_0.58	0.997
τ_0.54607	0.997
τ_0.5	0.996
τ_0.46	0.992
τ_0.4358	0.99
τ_0.42	0.988
τ_0.4047	0.985
τ_0.4	0.983
τ_0.39	0.976
τ_0.38	0.963
τ_0.37	0.94
τ_0.365	0.91
τ_0.35	0.82
τ_0.3341	0.62
τ_0.32	0.4
τ_0.31	0.25

transmittance: 25 mm
τ_2.5	0.27
τ_2.3254	0.52
τ_1.9701	0.83
τ_1.5296	0.959
τ_1.06	0.993
τ_0.7	0.993
τ_0.66	0.993
τ_0.62	0.993
τ_0.58	0.993
τ_0.54607	0.993
τ_0.5	0.99
τ_0.46	0.981
τ_0.4358	0.975
τ_0.42	0.971
τ_0.4047	0.963
τ_0.4	0.958
τ_0.39	0.94
τ_0.38	0.91
τ_0.37	0.85
τ_0.365	0.8
τ_0.35	0.6
τ_0.3341	0.3
τ_0.32	0.1
τ_0.31	0.03

Density: 3.52 g/cm³
Poisson coef.: 0.291
Young module: 750 Pa*10⁸
Knoop hardness: 450
Optical stress coef.: 1.47 1/Pa*10¹²
Abrasion: 3

Climatic resistance: 2
Staining: 3
Resistance to acids: 52.3
Resistance to alkalis: 1.3
Phosphate resistance: 4.3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	89
20 ~ 300	101

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-3.2
20 ~ 40		-2.5
60 ~ 80		-2.5
-40 ~ -20	e	-2.7
20 ~ 40	e	-2
60 ~ 80	e	-1.8
-40 ~ -20	g	-2.1
20 ~ 40	g	-1.3
60 ~ 80	g	-1.2

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-1
20 ~ 40		-1.1
60 ~ 80		-1.4
-40 ~ -20	e	-0.5
20 ~ 40	e	-0.5
60 ~ 80	e	-0.7
-40 ~ -20	g	0.1
20 ~ 40	g	0.1
60 ~ 80	g	-0.1