N-SK5 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.589130 n_e = 1.591424	V_d = 61.26 V_e = 61.02	n_F - n_C = 0.009615 n_F' - n_C' = 0.009692	Coloring: 0.34 - 0.29 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 0.991463823 C2 = 0.495982121 C3 = 0.987393925 C4 = 0.00522730467 C5 = 0.0172733646 C6 = 98.3594579

Refraction index
n _2.3254	1.559664
n _1.9701	1.565387
n _1.5296	1.571399
n _1.06	1.577470
n _t	1.578149
n _s	1.580942
n _r	1.584512
n _C	1.586192
n _C'	1.586661
n _0.6328	1.587098
n _D	1.589044
n _d	1.589130
n _e	1.591424
n _F	1.595808
n _F'	1.596353
n _g	1.601001
n _h	1.605298
n _i	1.612598
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8364
P_C,A'	0.3512
P_d,C	0.3054
P_e,C	0.5440
P_g,d	1.2345
P_g,F	0.5400
P_h,g	0.4468
P_i,g	1.2060
P_C',t	0.8851
P_e,C'	0.4952
P_F',e	0.5126
P_i,F'	1.6893

transmittance: 10 mm
τ_2.5	0.68
τ_2.3254	0.84
τ_1.9701	0.963
τ_1.5296	0.992
τ_1.06	0.999
τ_0.7	0.998
τ_0.66	0.998
τ_0.62	0.997
τ_0.58	0.998
τ_0.54607	0.998
τ_0.5	0.998
τ_0.46	0.996
τ_0.4358	0.995
τ_0.42	0.994
τ_0.4047	0.993
τ_0.4	0.992
τ_0.39	0.988
τ_0.38	0.984
τ_0.37	0.976
τ_0.365	0.971
τ_0.35	0.92
τ_0.3341	0.8
τ_0.32	0.59
τ_0.31	0.4
τ_0.3	0.21

transmittance: 25 mm
τ_2.5	0.38
τ_2.3254	0.64
τ_1.9701	0.91
τ_1.5296	0.98
τ_1.06	0.997
τ_0.7	0.995
τ_0.66	0.994
τ_0.62	0.993
τ_0.58	0.995
τ_0.54607	0.996
τ_0.5	0.994
τ_0.46	0.989
τ_0.4358	0.987
τ_0.42	0.986
τ_0.4047	0.983
τ_0.4	0.981
τ_0.39	0.971
τ_0.38	0.96
τ_0.37	0.94
τ_0.365	0.93
τ_0.35	0.82
τ_0.3341	0.58
τ_0.32	0.27
τ_0.31	0.1
τ_0.3	0.02

Density: 3.3 g/cm³
Poisson coef.: 0.256
Young module: 840 Pa*10⁸
Knoop hardness: 590
Optical stress coef.: 2.16 1/Pa*10¹²
Abrasion: 3

Climatic resistance: 3
Staining: 1
Resistance to acids: 4.4
Resistance to alkalis: 2
Phosphate resistance: 1.3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	55
20 ~ 300	65

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		1.4
20 ~ 40		1.9
60 ~ 80		2.6
-40 ~ -20	e	1.9
20 ~ 40	e	2.3
60 ~ 80	e	3
-40 ~ -20	g	2.4
20 ~ 40	g	2.9
60 ~ 80	g	3.6

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		3.5
20 ~ 40		3.2
60 ~ 80		3.6
-40 ~ -20	e	4
20 ~ 40	e	3.7
60 ~ 80	e	4.1
-40 ~ -20	g	4.6
20 ~ 40	g	4.3
60 ~ 80	g	4.7