N-LLF1 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.548139 n_e = 1.550976	V_d = 45.85 V_e = 45.55	n_F - n_C = 0.011954 n_F' - n_C' = 0.012095	Coloring: 0.38 - 0.35 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 1.06 mkm.
C1 = 1.2761803 C2 = 0.0750285303 C3 = 0.942212408 C4 = 0.0091121596 C5 = 0.054680072 C6 = 102.329548

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	1.534607
n _t	1.535340
n _s	1.538442
n _r	1.542578
n _C	1.544577
n _C'	1.545140
n _0.6328	1.545667
n _D	1.548034
n _d	1.548139
n _e	1.550976
n _F	1.556532
n _F'	1.557235
n _g	1.563358
n _h	1.569240
n _i	1.579839
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7726
P_C,A'	0.3334
P_d,C	0.2979
P_e,C	0.5352
P_g,d	1.2730
P_g,F	0.5709
P_h,g	0.4920
P_i,g	1.3786
P_C',t	0.8197
P_e,C'	0.4881
P_F',e	0.5235
P_i,F'	1.8907

transmittance: 10 mm
τ_2.5	0.75
τ_2.3254	0.86
τ_1.9701	0.971
τ_1.5296	0.989
τ_1.06	0.998
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	0.993
τ_0.46	0.989
τ_0.4358	0.985
τ_0.42	0.982
τ_0.4047	0.976
τ_0.4	0.969
τ_0.39	0.95
τ_0.38	0.9
τ_0.37	0.78
τ_0.365	0.66

transmittance: 25 mm
τ_2.5	0.49
τ_2.3254	0.68
τ_1.9701	0.93
τ_1.5296	0.973
τ_1.06	0.996
τ_0.7	0.993
τ_0.66	0.991
τ_0.62	0.991
τ_0.58	0.992
τ_0.54607	0.99
τ_0.5	0.982
τ_0.46	0.972
τ_0.4358	0.963
τ_0.42	0.955
τ_0.4047	0.94
τ_0.4	0.93
τ_0.39	0.88
τ_0.38	0.77
τ_0.37	0.53
τ_0.365	0.35

Density: 2.49 g/cm³
Poisson coef.: 0.225
Young module: 660 Pa*10⁸
Knoop hardness: 520
Optical stress coef.: 3.44 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	80
20 ~ 300	85

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-1.3
20 ~ 40		-0.5
60 ~ 80		0.1
-40 ~ -20	e	-0.6
20 ~ 40	e	0.4
60 ~ 80	e	1
-40 ~ -20	g	0.2
20 ~ 40	g	1.4
60 ~ 80	g	2.1

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0.8
20 ~ 40		0.9
60 ~ 80		1.1
-40 ~ -20	e	1.5
20 ~ 40	e	1.7
60 ~ 80	e	2.1
-40 ~ -20	g	2.4
20 ~ 40	g	2.7
60 ~ 80	g	3.2