LaK N13 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.693501 n_e = 1.696599	V_d = 53.33 V_e = 53.05	n_F - n_C = 0.013003 n_F' - n_C' = 0.013130	Coloring: 0.37 - 0.32 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.25792373 C2 = 0.553402861 C3 = 1.06335742 C4 = 0.0062149471 C5 = 0.0216809853 C6 = 104.494099

Refraction index
n _2.3254	1.660412
n _1.9701	1.665962
n _1.5296	1.671974
n _1.06	1.678586
n _t	1.679384
n _s	1.682789
n _r	1.687367
n _C	1.689579
n _C'	1.690200
n _0.6328	1.690782
n _D	1.693385
n _d	1.693501
n _e	1.696599
n _F	1.702583
n _F'	1.703331
n _g	1.709749
n _h	1.715733
n _i	1.725999
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7840
P_C,A'	0.3393
P_d,C	0.3015
P_e,C	0.5398
P_g,d	1.2494
P_g,F	0.5510
P_h,g	0.4601
P_i,g	1.2495
P_C',t	0.8318
P_e,C'	0.4920
P_F',e	0.5176
P_i,F'	1.7431

transmittance: 10 mm
τ_2.3254	0.75
τ_1.9701	0.967
τ_1.5296	0.994
τ_1.06	0.996
τ_0.7	0.997
τ_0.66	0.997
τ_0.62	0.998
τ_0.58	0.998
τ_0.54607	0.998
τ_0.5	0.996
τ_0.46	0.99
τ_0.4358	0.982
τ_0.42	0.98
τ_0.4047	0.976
τ_0.4	0.971
τ_0.39	0.963
τ_0.38	0.95
τ_0.37	0.9
τ_0.365	0.85
τ_0.35	0.66
τ_0.3341	0.4

transmittance: 25 mm
τ_2.3254	0.49
τ_1.9701	0.92
τ_1.5296	0.985
τ_1.06	0.99
τ_0.7	0.992
τ_0.66	0.993
τ_0.62	0.994
τ_0.58	0.995
τ_0.54607	0.995
τ_0.5	0.991
τ_0.46	0.974
τ_0.4358	0.956
τ_0.42	0.95
τ_0.4047	0.94
τ_0.4	0.93
τ_0.39	0.91
τ_0.38	0.87
τ_0.37	0.77
τ_0.365	0.67
τ_0.35	0.35
τ_0.3341	0.1

Density: 4.24 g/cm³
Poisson coef.: 0.289
Young module: 870 Pa*10⁸
Knoop hardness: 560
Optical stress coef.: 1.4 1/Pa*10¹²

Climatic resistance: 2
Staining: 2
Resistance to acids: 53.1
Resistance to alkalis: 2.3
Phosphate resistance: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	84
20 ~ 300	95

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-3.1
20 ~ 40		-2.2
60 ~ 80		-1.8
-40 ~ -20	e	-2.5
20 ~ 40	e	-1.5
60 ~ 80	e	-1
-40 ~ -20	g	-1.9
20 ~ 40	g	-0.8
60 ~ 80	g	-0.2

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-0.9
20 ~ 40		-0.8
60 ~ 80		-0.7
-40 ~ -20	e	-0.2
20 ~ 40	e	-0.1
60 ~ 80	e	0.1
-40 ~ -20	g	0.5
20 ~ 40	g	0.8
60 ~ 80	g	1