N-BASF64 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.703999 n_e = 1.708239	V_d = 39.38 V_e = 39.11	n_F - n_C = 0.017875 n_F' - n_C' = 0.018104	Coloring: 0.40 - 0.35 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.65554268 C2 = 0.17131977 C3 = 1.33664448 C4 = 0.0104485644 C5 = 0.0499394756 C6 = 118.961472

Refraction index
n _2.3254	1.663734
n _1.9701	1.669875
n _1.5296	1.676666
n _1.06	1.684525
n _t	1.685512
n _s	1.689816
n _r	1.695780
n _C	1.698716
n _C'	1.699547
n _0.6328	1.700327
n _D	1.703843
n _d	1.703999
n _e	1.708239
n _F	1.716591
n _F'	1.717652
n _g	1.726903
n _h	1.735809
n _i	1.751843
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7386
P_C,A'	0.3259
P_d,C	0.2955
P_e,C	0.5327
P_g,d	1.2813
P_g,F	0.5769
P_h,g	0.4982
P_i,g	1.3952
P_C',t	0.7851
P_e,C'	0.4862
P_F',e	0.5265
P_i,F'	1.9127

transmittance: 10 mm
τ_2.5	0.73
τ_2.3254	0.85
τ_1.9701	0.959
τ_1.5296	0.988
τ_1.06	0.994
τ_0.7	0.988
τ_0.66	0.982
τ_0.62	0.979
τ_0.58	0.979
τ_0.54607	0.98
τ_0.5	0.976
τ_0.46	0.967
τ_0.4358	0.959
τ_0.42	0.95
τ_0.4047	0.93
τ_0.4	0.92
τ_0.39	0.89
τ_0.38	0.82
τ_0.37	0.67
τ_0.365	0.55

transmittance: 25 mm
τ_2.5	0.45
τ_2.3254	0.67
τ_1.9701	0.9
τ_1.5296	0.97
τ_1.06	0.985
τ_0.7	0.97
τ_0.66	0.955
τ_0.62	0.95
τ_0.58	0.95
τ_0.54607	0.95
τ_0.5	0.94
τ_0.46	0.92
τ_0.4358	0.9
τ_0.42	0.88
τ_0.4047	0.84
τ_0.4	0.82
τ_0.39	0.75
τ_0.38	0.61
τ_0.37	0.37
τ_0.365	0.22

Density: 3.2 g/cm³
Poisson coef.: 0.264
Young module: 1050 Pa*10⁸
Knoop hardness: 650
Optical stress coef.: 2.38 1/Pa*10¹²
Abrasion: 4

Climatic resistance: 1
Staining: 0
Resistance to acids: 3.2
Resistance to alkalis: 1.2
Phosphate resistance: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	73
20 ~ 300	87

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0.6
20 ~ 40		1.4
60 ~ 80		1.8
-40 ~ -20	e	1.8
20 ~ 40	e	2.8
60 ~ 80	e	3.4
-40 ~ -20	g	3.1
20 ~ 40	g	4.4
60 ~ 80	g	5.1

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		2.8
20 ~ 40		2.8
60 ~ 80		2.9
-40 ~ -20	e	4.1
20 ~ 40	e	4.3
60 ~ 80	e	4.5
-40 ~ -20	g	5.5
20 ~ 40	g	5.9
60 ~ 80	g	6.3