N-SK16 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.620409 n_e = 1.622863	V_d = 60.32 V_e = 60.07	n_F - n_C = 0.010284 n_F' - n_C' = 0.010367	Coloring: 0.36 - 0.30 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.34317774 C2 = 0.241144399 C3 = 0.994317969 C4 = 0.00704687339 C5 = 0.0229005 C6 = 92.7508526

Refraction index
n _2.3254	1.589195
n _1.9701	1.595233
n _1.5296	1.601571
n _1.06	1.607987
n _t	1.608707
n _s	1.611674
n _r	1.615478
n _C	1.617271
n _C'	1.617772
n _0.6328	1.618239
n _D	1.620318
n _d	1.620409
n _e	1.622863
n _F	1.627556
n _F'	1.628140
n _g	1.633122
n _h	1.637734
n _i	1.645585
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8327
P_C,A'	0.3503
P_d,C	0.3051
P_e,C	0.5436
P_g,d	1.2360
P_g,F	0.5411
P_h,g	0.4484
P_i,g	1.2117
P_C',t	0.8813
P_e,C'	0.4949
P_F',e	0.5131
P_i,F'	1.6962

transmittance: 10 mm
τ_2.5	0.58
τ_2.3254	0.78
τ_1.9701	0.95
τ_1.5296	0.989
τ_1.06	0.998
τ_0.7	0.998
τ_0.66	0.998
τ_0.62	0.998
τ_0.58	0.998
τ_0.54607	0.997
τ_0.5	0.996
τ_0.46	0.993
τ_0.4358	0.992
τ_0.42	0.992
τ_0.4047	0.99
τ_0.4	0.988
τ_0.39	0.984
τ_0.38	0.976
τ_0.37	0.959
τ_0.365	0.94
τ_0.35	0.87
τ_0.3341	0.69
τ_0.32	0.41
τ_0.31	0.21

transmittance: 25 mm
τ_2.5	0.26
τ_2.3254	0.54
τ_1.9701	0.88
τ_1.5296	0.973
τ_1.06	0.995
τ_0.7	0.995
τ_0.66	0.994
τ_0.62	0.994
τ_0.58	0.994
τ_0.54607	0.993
τ_0.5	0.99
τ_0.46	0.983
τ_0.4358	0.981
τ_0.42	0.979
τ_0.4047	0.974
τ_0.4	0.97
τ_0.39	0.96
τ_0.38	0.94
τ_0.37	0.9
τ_0.365	0.86
τ_0.35	0.71
τ_0.3341	0.4
τ_0.32	0.11
τ_0.31	0.02

Density: 3.58 g/cm³
Poisson coef.: 0.264
Young module: 890 Pa*10⁸
Knoop hardness: 600
Optical stress coef.: 1.9 1/Pa*10¹²

Climatic resistance: 4
Staining: 4
Resistance to acids: 53.3
Resistance to alkalis: 3.3
Phosphate resistance: 3.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	63
20 ~ 300	73

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-0.5
20 ~ 40		0.3
60 ~ 80		0.8
-40 ~ -20	e	-0.1
20 ~ 40	e	0.9
60 ~ 80	e	1.5
-40 ~ -20	g	0.4
20 ~ 40	g	1.4
60 ~ 80	g	2.1

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		1.6
20 ~ 40		1.7
60 ~ 80		1.9
-40 ~ -20	e	2.2
20 ~ 40	e	2.3
60 ~ 80	e	2.6
-40 ~ -20	g	2.6
20 ~ 40	g	2.9
60 ~ 80	g	3.2