N-BAF3 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.582722 n_e = 1.585690	V_d = 46.63 V_e = 46.34	n_F - n_C = 0.012495 n_F' - n_C' = 0.012636	Coloring: 0.39 - 0.35 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.34859634 C2 = 0.10764424 C3 = 1.13207084 C4 = 0.00871492932 C5 = 0.0478406436 C6 = 112.936116

Refraction index
n _2.3254	1.549983
n _1.9701	1.555740
n _1.5296	1.561915
n _1.06	1.568500
n _t	1.569274
n _s	1.572542
n _r	1.576891
n _C	1.578990
n _C'	1.579580
n _0.6328	1.580133
n _D	1.582612
n _d	1.582722
n _e	1.585690
n _F	1.591485
n _F'	1.592216
n _g	1.598567
n _h	1.604629
n _i	1.615423
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7775
P_C,A'	0.3350
P_d,C	0.2987
P_e,C	0.5362
P_g,d	1.2681
P_g,F	0.5668
P_h,g	0.4851
P_i,g	1.3490
P_C',t	0.8248
P_e,C'	0.4889
P_F',e	0.5223
P_i,F'	1.8572

transmittance: 10 mm
τ_2.5	0.73
τ_2.3254	0.85
τ_1.9701	0.954
τ_1.5296	0.992
τ_1.06	0.997
τ_0.7	0.998
τ_0.66	0.997
τ_0.62	0.996
τ_0.58	0.997
τ_0.54607	0.996
τ_0.5	0.994
τ_0.46	0.99
τ_0.4358	0.986
τ_0.42	0.981
τ_0.4047	0.967
τ_0.4	0.959
τ_0.39	0.92
τ_0.38	0.85
τ_0.37	0.69
τ_0.365	0.57

transmittance: 25 mm
τ_2.5	0.46
τ_2.3254	0.66
τ_1.9701	0.89
τ_1.5296	0.98
τ_1.06	0.993
τ_0.7	0.994
τ_0.66	0.992
τ_0.62	0.991
τ_0.58	0.993
τ_0.54607	0.991
τ_0.5	0.985
τ_0.46	0.975
τ_0.4358	0.965
τ_0.42	0.952
τ_0.4047	0.92
τ_0.4	0.9
τ_0.39	0.82
τ_0.38	0.67
τ_0.37	0.4
τ_0.365	0.24

Density: 2.79 g/cm³
Poisson coef.: 0.226
Young module: 820 Pa*10⁸
Knoop hardness: 560
Optical stress coef.: 2.73 1/Pa*10¹²
Abrasion: 2

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

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	72
20 ~ 300	82

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0.3
20 ~ 40		1
60 ~ 80		1.5
-40 ~ -20	e	1.1
20 ~ 40	e	2
60 ~ 80	e	2.5
-40 ~ -20	g	1.9
20 ~ 40	g	3
60 ~ 80	g	3.7

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		2.4
20 ~ 40		2.4
60 ~ 80		2.5
-40 ~ -20	e	3.2
20 ~ 40	e	3.4
60 ~ 80	e	3.6
-40 ~ -20	g	4.1
20 ~ 40	g	4.4
60 ~ 80	g	4.8