N-ZK7 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.508469 n_e = 1.510451	V_d = 61.18 V_e = 60.98	n_F - n_C = 0.008309 n_F' - n_C' = 0.008370	Coloring: 0.34 - 0.29 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.07715032 C2 = 0.168079109 C3 = 0.851889892 C4 = 0.00676601657 C5 = 0.0230642817 C6 = 89.0498778

Refraction index
n _2.3254	1.480616
n _1.9701	1.486369
n _1.5296	1.492327
n _1.06	1.498129
n _t	1.498756
n _s	1.501290
n _r	1.504450
n _C	1.505918
n _C'	1.506326
n _0.6328	1.506707
n _D	1.508395
n _d	1.508469
n _e	1.510451
n _F	1.514228
n _F'	1.514697
n _g	1.518690
n _h	1.522380
n _i	1.528648
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8618
P_C,A'	0.3565
P_d,C	0.3069
P_e,C	0.5455
P_g,d	1.2300
P_g,F	0.5369
P_h,g	0.4439
P_i,g	1.1982
P_C',t	0.9109
P_e,C'	0.4963
P_F',e	0.5108
P_i,F'	1.6788

transmittance: 10 mm
τ_2.5	0.66
τ_2.3254	0.85
τ_1.9701	0.971
τ_1.5296	0.99
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	0.998
τ_0.5	0.997
τ_0.46	0.995
τ_0.4358	0.994
τ_0.42	0.992
τ_0.4047	0.99
τ_0.4	0.989
τ_0.39	0.986
τ_0.38	0.98
τ_0.37	0.967
τ_0.365	0.959
τ_0.35	0.91
τ_0.3341	0.79
τ_0.32	0.59
τ_0.31	0.36

transmittance: 25 mm
τ_2.5	0.35
τ_2.3254	0.66
τ_1.9701	0.93
τ_1.5296	0.976
τ_1.06	0.994
τ_0.7	0.996
τ_0.66	0.994
τ_0.62	0.994
τ_0.58	0.995
τ_0.54607	0.995
τ_0.5	0.993
τ_0.46	0.988
τ_0.4358	0.984
τ_0.42	0.981
τ_0.4047	0.975
τ_0.4	0.973
τ_0.39	0.965
τ_0.38	0.95
τ_0.37	0.92
τ_0.365	0.9
τ_0.35	0.79
τ_0.3341	0.56
τ_0.32	0.27
τ_0.31	0.08

Density: 2.49 g/cm³
Poisson coef.: 0.214
Young module: 700 Pa*10⁸
Knoop hardness: 530
Optical stress coef.: 3.63 1/Pa*10¹²
Abrasion: 4

Climatic resistance: 1
Staining: 0
Resistance to acids: 2
Resistance to alkalis: 1.2
Phosphate resistance: 2.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	45
20 ~ 300	52

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		3.9
20 ~ 40		5.1
60 ~ 80		5.4
-40 ~ -20	e	4.5
20 ~ 40	e	5.7
60 ~ 80	e	6.2
-40 ~ -20	g	4.9
20 ~ 40	g	6.3
60 ~ 80	g	6.8

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		5.9
20 ~ 40		6.4
60 ~ 80		6.4
-40 ~ -20	e	6.5
20 ~ 40	e	7
60 ~ 80	e	7.2
-40 ~ -20	g	7
20 ~ 40	g	7.6
60 ~ 80	g	7.8