N-BALF5 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.547389 n_e = 1.549818	V_d = 53.63 V_e = 53.36	n_F - n_C = 0.010206 n_F' - n_C' = 0.010303	Coloring: 0.37 - 0.34 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 1.06 mkm.
C1 = 1.28385965 C2 = 0.0719300942 C3 = 1.05048927 C4 = 0.00825815975 C5 = 0.0441920027 C6 = 107.097324

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	1.535285
n _t	1.535979
n _s	1.538847
n _r	1.542548
n _C	1.544302
n _C'	1.544793
n _0.6328	1.545252
n _D	1.547299
n _d	1.547389
n _e	1.549818
n _F	1.554509
n _F'	1.555096
n _g	1.560155
n _h	1.564914
n _i	1.573217
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8154
P_C,A'	0.3447
P_d,C	0.3024
P_e,C	0.5404
P_g,d	1.2506
P_g,F	0.5531
P_h,g	0.4662
P_i,g	1.2798
P_C',t	0.8635
P_e,C'	0.4923
P_F',e	0.5171
P_i,F'	1.7754

transmittance: 10 mm
τ_2.5	0.62
τ_2.3254	0.76
τ_1.9701	0.92
τ_1.5296	0.989
τ_1.06	0.996
τ_0.7	0.998
τ_0.66	0.997
τ_0.62	0.997
τ_0.58	0.998
τ_0.54607	0.998
τ_0.5	0.997
τ_0.46	0.995
τ_0.4358	0.994
τ_0.42	0.991
τ_0.4047	0.986
τ_0.4	0.983
τ_0.39	0.967
τ_0.38	0.94
τ_0.37	0.87
τ_0.365	0.82
τ_0.35	0.44

transmittance: 25 mm
τ_2.5	0.3
τ_2.3254	0.5
τ_1.9701	0.81
τ_1.5296	0.973
τ_1.06	0.991
τ_0.7	0.995
τ_0.66	0.993
τ_0.62	0.993
τ_0.58	0.995
τ_0.54607	0.995
τ_0.5	0.992
τ_0.46	0.988
τ_0.4358	0.984
τ_0.42	0.978
τ_0.4047	0.965
τ_0.4	0.957
τ_0.39	0.92
τ_0.38	0.85
τ_0.37	0.71
τ_0.365	0.6
τ_0.35	0.13

Density: 2.61 g/cm³
Poisson coef.: 0.214
Young module: 810 Pa*10⁸
Knoop hardness: 600
Optical stress coef.: 2.76 1/Pa*10¹²
Abrasion: 2

Climatic resistance: 1
Staining: 0
Resistance to acids: 1
Resistance to alkalis: 2
Phosphate resistance: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	73
20 ~ 300	84

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0.1
20 ~ 40		0.8
60 ~ 80		1.3
-40 ~ -20	e	0.7
20 ~ 40	e	1.6
60 ~ 80	e	2.1
-40 ~ -20	g	1.3
20 ~ 40	g	2.3
60 ~ 80	g	2.9

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		2.1
20 ~ 40		2.1
60 ~ 80		2.3
-40 ~ -20	e	2.8
20 ~ 40	e	2.9
60 ~ 80	e	3.1
-40 ~ -20	g	3.5
20 ~ 40	g	3.7
60 ~ 80	g	3.9