N-BASF2 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.664460 n_e = 1.668828	V_d = 36.00 V_e = 35.72	n_F - n_C = 0.018456 n_F' - n_C' = 0.018719	Coloring: 0.41 - 0.36 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.53652081 C2 = 0.156971102 C3 = 1.30196815 C4 = 0.0108435729 C5 = 0.0562278762 C6 = 131.3397

Refraction index
n _2.3254	1.625522
n _1.9701	1.631090
n _1.5296	1.637344
n _1.06	1.644840
n _t	1.645806
n _s	1.650068
n _r	1.656070
n _C	1.659054
n _C'	1.659901
n _0.6328	1.660698
n _D	1.664299
n _d	1.664460
n _e	1.668828
n _F	1.677511
n _F'	1.678621
n _g	1.688381
n _h	1.697917
n _i	1.715492
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7178
P_C,A'	0.3198
P_d,C	0.2928
P_e,C	0.5295
P_g,d	1.2960
P_g,F	0.5889
P_h,g	0.5166
P_i,g	1.4688
P_C',t	0.7637
P_e,C'	0.4836
P_F',e	0.5306
P_i,F'	1.9976

transmittance: 10 mm
τ_2.5	0.86
τ_2.3254	0.9
τ_1.9701	0.971
τ_1.5296	0.994
τ_1.06	0.999
τ_0.7	0.996
τ_0.66	0.994
τ_0.62	0.994
τ_0.58	0.995
τ_0.54607	0.994
τ_0.5	0.988
τ_0.46	0.98
τ_0.4358	0.971
τ_0.42	0.954
τ_0.4047	0.91
τ_0.4	0.89
τ_0.39	0.8
τ_0.38	0.63
τ_0.37	0.32

transmittance: 25 mm
τ_2.5	0.68
τ_2.3254	0.76
τ_1.9701	0.93
τ_1.5296	0.985
τ_1.06	0.997
τ_0.7	0.99
τ_0.66	0.985
τ_0.62	0.985
τ_0.58	0.987
τ_0.54607	0.985
τ_0.5	0.971
τ_0.46	0.951
τ_0.4358	0.93
τ_0.42	0.89
τ_0.4047	0.8
τ_0.4	0.75
τ_0.39	0.58
τ_0.38	0.32
τ_0.37	0.06

Density: 3.15 g/cm³
Poisson coef.: 0.247
Young module: 840 Pa*10⁸
Knoop hardness: 580
Optical stress coef.: 3.04 1/Pa*10¹²
Abrasion: 3

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	71
20 ~ 300	81

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0.6
20 ~ 40		1.5
60 ~ 80		2
-40 ~ -20	e	1.9
20 ~ 40	e	3
60 ~ 80	e	3.6
-40 ~ -20	g	3.3
20 ~ 40	g	4.7
60 ~ 80	g	5.5

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		2.8
20 ~ 40		2.9
60 ~ 80		3.1
-40 ~ -20	e	4.1
20 ~ 40	e	4.4
60 ~ 80	e	4.8
-40 ~ -20	g	5.6
20 ~ 40	g	6.2
60 ~ 80	g	6.7