N-LAF33 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.785824 n_e = 1.790066	V_d = 44.05 V_e = 43.80	n_F - n_C = 0.017838 n_F' - n_C' = 0.018037	Coloring: 0.39 - 0.32 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.79653417 C2 = 0.311577903 C3 = 1.15981863 C4 = 0.00927313493 C5 = 0.0358201181 C6 = 87.3448712

Refraction index
n _2.3254	1.742622
n _1.9701	1.749680
n _1.5296	1.757322
n _1.06	1.765844
n _t	1.766888
n _s	1.771383
n _r	1.777509
n _C	1.780494
n _C'	1.781336
n _0.6328	1.782125
n _D	1.785667
n _d	1.785824
n _e	1.790066
n _F	1.798333
n _F'	1.799374
n _g	1.808369
n _h	1.816872
n _i	1.831747
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7627
P_C,A'	0.3330
P_d,C	0.2987
P_e,C	0.5365
P_g,d	1.2638
P_g,F	0.5626
P_h,g	0.4766
P_i,g	1.3105
P_C',t	0.8099
P_e,C'	0.4893
P_F',e	0.5217
P_i,F'	1.8148

transmittance: 10 mm
τ_2.5	0.47
τ_2.3254	0.75
τ_1.9701	0.94
τ_1.5296	0.988
τ_1.06	0.998
τ_0.7	0.998
τ_0.66	0.997
τ_0.62	0.997
τ_0.58	0.997
τ_0.54607	0.997
τ_0.5	0.994
τ_0.46	0.987
τ_0.4358	0.98
τ_0.42	0.973
τ_0.4047	0.962
τ_0.4	0.957
τ_0.39	0.94
τ_0.38	0.91
τ_0.37	0.86
τ_0.365	0.82
τ_0.35	0.6
τ_0.3341	0.25

transmittance: 25 mm
τ_2.5	0.15
τ_2.3254	0.48
τ_1.9701	0.86
τ_1.5296	0.97
τ_1.06	0.994
τ_0.7	0.994
τ_0.66	0.993
τ_0.62	0.992
τ_0.58	0.992
τ_0.54607	0.992
τ_0.5	0.985
τ_0.46	0.967
τ_0.4358	0.95
τ_0.42	0.93
τ_0.4047	0.91
τ_0.4	0.9
τ_0.39	0.86
τ_0.38	0.79
τ_0.37	0.68
τ_0.365	0.6
τ_0.35	0.28
τ_0.3341	0.03

Density: 4.36 g/cm³
Poisson coef.: 0.301
Young module: 1110 Pa*10⁸
Knoop hardness: 730
Optical stress coef.: 2.21 1/Pa*10¹²
Abrasion: 1

Climatic resistance: 1
Staining: 2
Resistance to acids: 52.2
Resistance to alkalis: 1
Phosphate resistance: 3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	56
20 ~ 300	67

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		4.4
20 ~ 40		5.5
60 ~ 80		6
-40 ~ -20	e	5.7
20 ~ 40	e	6.9
60 ~ 80	e	7.6
-40 ~ -20	g	7
20 ~ 40	g	8.4
60 ~ 80	g	9.3

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		6.8
20 ~ 40		7
60 ~ 80		7.2
-40 ~ -20	e	8.1
20 ~ 40	e	8.5
60 ~ 80	e	8.9
-40 ~ -20	g	9.4
20 ~ 40	g	10
60 ~ 80	g	10.5