N-BAF51 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.652239 n_e = 1.655686	V_d = 44.95 V_e = 44.67	n_F - n_C = 0.014507 n_F' - n_C' = 0.014677	Coloring: 0.39 - 0.34 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.51503623 C2 = 0.153621958 C3 = 1.15427909 C4 = 0.00942734715 C5 = 0.04308265 C6 = 124.889868

Refraction index
n _2.3254	1.618733
n _1.9701	1.623899
n _1.5296	1.629611
n _1.06	1.636191
n _t	1.637014
n _s	1.640587
n _r	1.645509
n _C	1.647920
n _C'	1.648601
n _0.6328	1.649240
n _D	1.652112
n _d	1.652239
n _e	1.655686
n _F	1.662428
n _F'	1.663279
n _g	1.670653
n _h	1.677661
n _i	1.690029
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7518
P_C,A'	0.3302
P_d,C	0.2977
P_e,C	0.5353
P_g,d	1.2692
P_g,F	0.5669
P_h,g	0.4830
P_i,g	1.3356
P_C',t	0.7987
P_e,C'	0.4883
P_F',e	0.5233
P_i,F'	1.8439

transmittance: 10 mm
τ_2.5	0.75
τ_2.3254	0.83
τ_1.9701	0.95
τ_1.5296	0.992
τ_1.06	0.997
τ_0.7	0.997
τ_0.66	0.996
τ_0.62	0.996
τ_0.58	0.997
τ_0.54607	0.996
τ_0.5	0.994
τ_0.46	0.988
τ_0.4358	0.982
τ_0.42	0.976
τ_0.4047	0.963
τ_0.4	0.954
τ_0.39	0.92
τ_0.38	0.86
τ_0.37	0.74
τ_0.365	0.64
τ_0.35	0.21

transmittance: 25 mm
τ_2.5	0.48
τ_2.3254	0.63
τ_1.9701	0.87
τ_1.5296	0.98
τ_1.06	0.993
τ_0.7	0.993
τ_0.66	0.99
τ_0.62	0.99
τ_0.58	0.992
τ_0.54607	0.991
τ_0.5	0.985
τ_0.46	0.97
τ_0.4358	0.956
τ_0.42	0.94
τ_0.4047	0.91
τ_0.4	0.89
τ_0.39	0.82
τ_0.38	0.69
τ_0.37	0.47
τ_0.365	0.33
τ_0.35	0.02

Density: 3.33 g/cm³
Poisson coef.: 0.262
Young module: 910 Pa*10⁸
Knoop hardness: 560
Optical stress coef.: 2.22 1/Pa*10¹²
Abrasion: 5

Climatic resistance: 2
Staining: 0
Resistance to acids: 5.4
Resistance to alkalis: 1.3
Phosphate resistance: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	84
20 ~ 300	95

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-0.5
20 ~ 40		0.3
60 ~ 80		0.7
-40 ~ -20	e	0.5
20 ~ 40	e	1.5
60 ~ 80	e	2
-40 ~ -20	g	1.5
20 ~ 40	g	2.7
60 ~ 80	g	3.3

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		1.7
20 ~ 40		1.7
60 ~ 80		1.8
-40 ~ -20	e	2.8
20 ~ 40	e	2.9
60 ~ 80	e	3.1
-40 ~ -20	g	3.8
20 ~ 40	g	4.1
60 ~ 80	g	4.4