N-LAK22 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.651130 n_e = 1.653907	V_d = 55.89 V_e = 55.62	n_F - n_C = 0.011649 n_F' - n_C' = 0.011755	Coloring: 0.36 - 0.30 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.14229781 C2 = 0.535138441 C3 = 1.04088385 C4 = 0.00585778594 C5 = 0.0198546147 C6 = 100.834017

Refraction index
n _2.3254	1.619155
n _1.9701	1.624883
n _1.5296	1.630999
n _1.06	1.637473
n _t	1.638229
n _s	1.641408
n _r	1.645596
n _C	1.647599
n _C'	1.648160
n _0.6328	1.648684
n _D	1.651026
n _d	1.651130
n _e	1.653907
n _F	1.659249
n _F'	1.659915
n _g	1.665618
n _h	1.670916
n _i	1.679970
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8042
P_C,A'	0.3440
P_d,C	0.3031
P_e,C	0.5414
P_g,d	1.2435
P_g,F	0.5466
P_h,g	0.4548
P_i,g	1.2319
P_C',t	0.8524
P_e,C'	0.4933
P_F',e	0.5157
P_i,F'	1.7214

transmittance: 10 mm
τ_2.5	0.67
τ_2.3254	0.83
τ_1.9701	0.959
τ_1.5296	0.991
τ_1.06	0.998
τ_0.7	0.998
τ_0.66	0.997
τ_0.62	0.996
τ_0.58	0.997
τ_0.54607	0.997
τ_0.5	0.995
τ_0.46	0.992
τ_0.4358	0.99
τ_0.42	0.989
τ_0.4047	0.987
τ_0.4	0.985
τ_0.39	0.98
τ_0.38	0.967
τ_0.37	0.95
τ_0.365	0.93
τ_0.35	0.84
τ_0.3341	0.66
τ_0.32	0.4
τ_0.31	0.21

transmittance: 25 mm
τ_2.5	0.37
τ_2.3254	0.62
τ_1.9701	0.9
τ_1.5296	0.978
τ_1.06	0.994
τ_0.7	0.994
τ_0.66	0.992
τ_0.62	0.991
τ_0.58	0.993
τ_0.54607	0.993
τ_0.5	0.988
τ_0.46	0.98
τ_0.4358	0.975
τ_0.42	0.973
τ_0.4047	0.968
τ_0.4	0.964
τ_0.39	0.95
τ_0.38	0.92
τ_0.37	0.87
τ_0.365	0.84
τ_0.35	0.66
τ_0.3341	0.35
τ_0.32	0.1
τ_0.31	0.02

Density: 3.73 g/cm³
Poisson coef.: 0.266
Young module: 900 Pa*10⁸
Knoop hardness: 600
Optical stress coef.: 1.82 1/Pa*10¹²
Abrasion: 4

Climatic resistance: 2
Staining: 2
Resistance to acids: 51.2
Resistance to alkalis: 1
Phosphate resistance: 2.3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	66
20 ~ 300	74

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0
20 ~ 40		1
60 ~ 80		1.6
-40 ~ -20	e	0.6
20 ~ 40	e	1.7
60 ~ 80	e	2.3
-40 ~ -20	g	1.3
20 ~ 40	g	2.4
60 ~ 80	g	3.1

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		2.2
20 ~ 40		2.4
60 ~ 80		2.7
-40 ~ -20	e	2.9
20 ~ 40	e	3.1
60 ~ 80	e	3.4
-40 ~ -20	g	3.6
20 ~ 40	g	3.9
60 ~ 80	g	4.2