N-SK15 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.622960 n_e = 1.625520	V_d = 58.01 V_e = 57.74	n_F - n_C = 0.010737 n_F' - n_C' = 0.010831	Coloring: 0.36 - 0.31 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.30417786 C2 = 0.28584116 C3 = 0.974781572 C4 = 0.00695051276 C5 = 0.0232023703 C6 = 99.016884

Refraction index
n _2.3254	1.592676
n _1.9701	1.598220
n _1.5296	1.604112
n _1.06	1.610271
n _t	1.610983
n _s	1.613957
n _r	1.617847
n _C	1.619700
n _C'	1.620218
n _0.6328	1.620703
n _D	1.622864
n _d	1.622960
n _e	1.625520
n _F	1.630437
n _F'	1.631050
n _g	1.636292
n _h	1.641159
n _i	1.649472
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8118
P_C,A'	0.3457
P_d,C	0.3036
P_e,C	0.5420
P_g,d	1.2416
P_g,F	0.5453
P_h,g	0.4533
P_i,g	1.2275
P_C',t	0.8601
P_e,C'	0.4937
P_F',e	0.5150
P_i,F'	1.7157

transmittance: 10 mm
τ_2.5	0.67
τ_2.3254	0.83
τ_1.9701	0.959
τ_1.5296	0.99
τ_1.06	0.996
τ_0.7	0.997
τ_0.66	0.996
τ_0.62	0.996
τ_0.58	0.996
τ_0.54607	0.996
τ_0.5	0.994
τ_0.46	0.992
τ_0.4358	0.99
τ_0.42	0.988
τ_0.4047	0.986
τ_0.4	0.985
τ_0.39	0.98
τ_0.38	0.969
τ_0.37	0.95
τ_0.365	0.93
τ_0.35	0.83
τ_0.3341	0.55

transmittance: 25 mm
τ_2.5	0.37
τ_2.3254	0.62
τ_1.9701	0.9
τ_1.5296	0.975
τ_1.06	0.991
τ_0.7	0.993
τ_0.66	0.991
τ_0.62	0.99
τ_0.58	0.991
τ_0.54607	0.99
τ_0.5	0.986
τ_0.46	0.98
τ_0.4358	0.976
τ_0.42	0.971
τ_0.4047	0.965
τ_0.4	0.962
τ_0.39	0.95
τ_0.38	0.93
τ_0.37	0.88
τ_0.365	0.84
τ_0.35	0.63
τ_0.3341	0.22

Density: 3.62 g/cm³
Poisson coef.: 0.265
Young module: 840 Pa*10⁸
Knoop hardness: 620
Optical stress coef.: 1.93 1/Pa*10¹²
Abrasion: 3

Climatic resistance: 3
Staining: 3
Resistance to acids: 52.2
Resistance to alkalis: 2
Phosphate resistance: 3.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	67
20 ~ 300	76

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-0.2
20 ~ 40		0.6
60 ~ 80		1.1
-40 ~ -20	e	0.4
20 ~ 40	e	1.3
60 ~ 80	e	1.8
-40 ~ -20	g	1
20 ~ 40	g	1.9
60 ~ 80	g	2.5

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		2
20 ~ 40		2
60 ~ 80		2.1
-40 ~ -20	e	2.6
20 ~ 40	e	2.7
60 ~ 80	e	2.9
-40 ~ -20	g	3.2
20 ~ 40	g	3.4
60 ~ 80	g	3.7