N-LF5 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.581440 n_e = 1.584814	V_d = 40.84 V_e = 40.56	n_F - n_C = 0.014233 n_F' - n_C' = 0.014416	Coloring: 0.39 - 0.36 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 1.06 mkm.
C1 = 1.33272661 C2 = 0.112284629 C3 = 1.10202641 C4 = 0.00971526176 C5 = 0.0534456265 C6 = 118.651687

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	1.565792
n _t	1.566604
n _s	1.570102
n _r	1.574888
n _C	1.577231
n _C'	1.577894
n _0.6328	1.578515
n _D	1.581315
n _d	1.581440
n _e	1.584814
n _F	1.591465
n _F'	1.592311
n _g	1.599701
n _h	1.606846
n _i	1.619816
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7466
P_C,A'	0.3271
P_d,C	0.2956
P_e,C	0.5327
P_g,d	1.2829
P_g,F	0.5785
P_h,g	0.5019
P_i,g	1.4132
P_C',t	0.7931
P_e,C'	0.4861
P_F',e	0.5266
P_i,F'	1.9323

transmittance: 10 mm
τ_2.5	0.75
τ_2.3254	0.82
τ_1.9701	0.95
τ_1.5296	0.988
τ_1.06	0.997
τ_0.7	0.997
τ_0.66	0.996
τ_0.62	0.996
τ_0.58	0.996
τ_0.54607	0.995
τ_0.5	0.991
τ_0.46	0.986
τ_0.4358	0.981
τ_0.42	0.976
τ_0.4047	0.954
τ_0.4	0.94
τ_0.39	0.89
τ_0.38	0.78
τ_0.37	0.54
τ_0.365	0.36

transmittance: 25 mm
τ_2.5	0.48
τ_2.3254	0.6
τ_1.9701	0.87
τ_1.5296	0.971
τ_1.06	0.993
τ_0.7	0.992
τ_0.66	0.989
τ_0.62	0.989
τ_0.58	0.99
τ_0.54607	0.988
τ_0.5	0.978
τ_0.46	0.965
τ_0.4358	0.954
τ_0.42	0.94
τ_0.4047	0.89
τ_0.4	0.86
τ_0.39	0.75
τ_0.38	0.54
τ_0.37	0.21
τ_0.365	0.08

Density: 2.57 g/cm³
Poisson coef.: 0.221
Young module: 750 Pa*10⁸
Knoop hardness: 550
Optical stress coef.: 3.01 1/Pa*10¹²
Abrasion: 1

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	92

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-0.2
20 ~ 40		0.5
60 ~ 80		0.8
-40 ~ -20	e	0.7
20 ~ 40	e	1.6
60 ~ 80	e	2
-40 ~ -20	g	1.8
20 ~ 40	g	2.9
60 ~ 80	g	3.4

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		1.9
20 ~ 40		1.8
60 ~ 80		1.8
-40 ~ -20	e	2.9
20 ~ 40	e	3
60 ~ 80	e	3.1
-40 ~ -20	g	4
20 ~ 40	g	4.3
60 ~ 80	g	4.5