BASF51 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.723728 n_e = 1.728231	V_d = 38.11 V_e = 37.84	n_F - n_C = 0.018989 n_F' - n_C' = 0.019239	Coloring: 0.41 - 0.34 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.67507496 C2 = 0.212822109 C3 = 0.966557263 C4 = 0.010566706 C5 = 0.0476664644 C6 = 92.0388572

Refraction index
n _2.3254	1.683073
n _1.9701	1.688952
n _1.5296	1.695497
n _1.06	1.703315
n _t	1.704323
n _s	1.708771
n _r	1.715027
n _C	1.718129
n _C'	1.719008
n _0.6328	1.719834
n _D	1.723561
n _d	1.723728
n _e	1.728231
n _F	1.737119
n _F'	1.738248
n _g	1.748103
n _h	1.757588
n _i	1.774637
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7270
P_C,A'	0.3234
P_d,C	0.2948
P_e,C	0.5319
P_g,d	1.2835
P_g,F	0.5784
P_h,g	0.4994
P_i,g	1.3972
P_C',t	0.7733
P_e,C'	0.4856
P_F',e	0.5274
P_i,F'	1.9162

transmittance: 10 mm
τ_2.3254	0.8
τ_1.9701	0.967
τ_1.5296	0.992
τ_1.06	0.996
τ_0.7	0.996
τ_0.66	0.996
τ_0.62	0.994
τ_0.58	0.994
τ_0.54607	0.992
τ_0.5	0.988
τ_0.46	0.98
τ_0.4358	0.971
τ_0.42	0.959
τ_0.4047	0.93
τ_0.4	0.91
τ_0.39	0.88
τ_0.38	0.81
τ_0.37	0.7
τ_0.365	0.62
τ_0.35	0.3

transmittance: 25 mm
τ_2.3254	0.57
τ_1.9701	0.92
τ_1.5296	0.98
τ_1.06	0.99
τ_0.7	0.99
τ_0.66	0.99
τ_0.62	0.985
τ_0.58	0.985
τ_0.54607	0.98
τ_0.5	0.97
τ_0.46	0.95
τ_0.4358	0.93
τ_0.42	0.9
τ_0.4047	0.83
τ_0.4	0.8
τ_0.39	0.72
τ_0.38	0.59
τ_0.37	0.41
τ_0.365	0.3
τ_0.35	0.05

Density: 4.31 g/cm³
Poisson coef.: 0.289
Young module: 800 Pa*10⁸
Knoop hardness: 540
Optical stress coef.: 2.15 1/Pa*10¹²
Abrasion: 1

Climatic resistance: 2
Staining: 4
Resistance to acids: 52.3
Resistance to alkalis: 1.2
Phosphate resistance: 3.3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	54
20 ~ 300	64

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		5.6
20 ~ 40		6.7
60 ~ 80		7.2
-40 ~ -20	e	7.3
20 ~ 40	e	8.6
60 ~ 80	e	9.3
-40 ~ -20	g	9.1
20 ~ 40	g	10.7
60 ~ 80	g	11.5

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		7.9
20 ~ 40		8.2
60 ~ 80		8.3
-40 ~ -20	e	9.6
20 ~ 40	e	10.1
60 ~ 80	e	10.5
-40 ~ -20	g	11.5
20 ~ 40	g	12.2
60 ~ 80	g	12.7