N-BAF52 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.608631 n_e = 1.611732	V_d = 46.59 V_e = 46.30	n_F - n_C = 0.013061 n_F' - n_C' = 0.013210	Coloring: 0.39 - 0.35 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.43903433 C2 = 0.0967046052 C3 = 1.09875818 C4 = 0.00907800128 C5 = 0.050821208 C6 = 105.691856

Refraction index
n _2.3254	1.574747
n _1.9701	1.580666
n _1.5296	1.587015
n _1.06	1.593811
n _t	1.594613
n _s	1.598009
n _r	1.602542
n _C	1.604732
n _C'	1.605348
n _0.6328	1.605925
n _D	1.608515
n _d	1.608631
n _e	1.611732
n _F	1.617793
n _F'	1.618559
n _g	1.625210
n _h	1.631568
n _i	1.642925
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7746
P_C,A'	0.3344
P_d,C	0.2984
P_e,C	0.5359
P_g,d	1.2693
P_g,F	0.5678
P_h,g	0.4867
P_i,g	1.3562
P_C',t	0.8218
P_e,C'	0.4887
P_F',e	0.5226
P_i,F'	1.8654

transmittance: 10 mm
τ_2.5	0.69
τ_2.3254	0.83
τ_1.9701	0.954
τ_1.5296	0.99
τ_1.06	0.998
τ_0.7	0.997
τ_0.66	0.996
τ_0.62	0.996
τ_0.58	0.996
τ_0.54607	0.996
τ_0.5	0.992
τ_0.46	0.987
τ_0.4358	0.981
τ_0.42	0.975
τ_0.4047	0.959
τ_0.4	0.95
τ_0.39	0.91
τ_0.38	0.84
τ_0.37	0.67
τ_0.365	0.54

transmittance: 25 mm
τ_2.5	0.39
τ_2.3254	0.63
τ_1.9701	0.89
τ_1.5296	0.975
τ_1.06	0.994
τ_0.7	0.993
τ_0.66	0.99
τ_0.62	0.989
τ_0.58	0.99
τ_0.54607	0.989
τ_0.5	0.98
τ_0.46	0.967
τ_0.4358	0.954
τ_0.42	0.94
τ_0.4047	0.9
τ_0.4	0.88
τ_0.39	0.8
τ_0.38	0.65
τ_0.37	0.37
τ_0.365	0.21

Density: 3.05 g/cm³
Poisson coef.: 0.237
Young module: 860 Pa*10⁸
Knoop hardness: 600
Optical stress coef.: 2.42 1/Pa*10¹²
Abrasion: 3

Climatic resistance: 1
Staining: 0
Resistance to acids: 1
Resistance to alkalis: 1.3
Phosphate resistance: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	69
20 ~ 300	78

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0.2
20 ~ 40		0.9
60 ~ 80		1.4
-40 ~ -20	e	0.9
20 ~ 40	e	1.9
60 ~ 80	e	2.5
-40 ~ -20	g	1.8
20 ~ 40	g	2.9
60 ~ 80	g	3.6

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		2.3
20 ~ 40		2.3
60 ~ 80		2.5
-40 ~ -20	e	3.1
20 ~ 40	e	3.3
60 ~ 80	e	3.6
-40 ~ -20	g	4
20 ~ 40	g	4.3
60 ~ 80	g	4.7