N-F2 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.620053 n_e = 1.624080	V_d = 36.43 V_e = 36.16	n_F - n_C = 0.017019 n_F' - n_C' = 0.017257	Coloring: 0.39 - 0.36 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.39757037 C2 = 0.159201403 C3 = 1.2686543 C4 = 0.00995906143 C5 = 0.0546931752 C6 = 119.248346

Refraction index
n _2.3254	1.581365
n _1.9701	1.587438
n _1.5296	1.594103
n _1.06	1.601670
n _t	1.602608
n _s	1.606674
n _r	1.612290
n _C	1.615057
n _C'	1.615842
n _0.6328	1.616578
n _D	1.619904
n _d	1.620053
n _e	1.624080
n _F	1.632077
n _F'	1.633099
n _g	1.642087
n _h	1.650871
n _i	1.667068
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7314
P_C,A'	0.3224
P_d,C	0.2934
P_e,C	0.5301
P_g,d	1.2946
P_g,F	0.5880
P_h,g	0.5160
P_i,g	1.4677
P_C',t	0.7775
P_e,C'	0.4840
P_F',e	0.5299
P_i,F'	1.9958

transmittance: 10 mm
τ_2.5	0.75
τ_2.3254	0.84
τ_1.9701	0.95
τ_1.5296	0.991
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	0.997
τ_0.5	0.994
τ_0.46	0.989
τ_0.4358	0.985
τ_0.42	0.98
τ_0.4047	0.959
τ_0.4	0.95
τ_0.39	0.89
τ_0.38	0.76
τ_0.37	0.48
τ_0.365	0.28

transmittance: 25 mm
τ_2.5	0.48
τ_2.3254	0.64
τ_1.9701	0.88
τ_1.5296	0.977
τ_1.06	0.996
τ_0.7	0.992
τ_0.66	0.99
τ_0.62	0.991
τ_0.58	0.993
τ_0.54607	0.992
τ_0.5	0.984
τ_0.46	0.973
τ_0.4358	0.963
τ_0.42	0.95
τ_0.4047	0.9
τ_0.4	0.87
τ_0.39	0.75
τ_0.38	0.51
τ_0.37	0.16
τ_0.365	0.04

Density: 2.65 g/cm³
Poisson coef.: 0.228
Young module: 820 Pa*10⁸
Knoop hardness: 600
Optical stress coef.: 3.03 1/Pa*10¹²
Abrasion: 2

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	78
20 ~ 300	91

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-0.1
20 ~ 40		0.7
60 ~ 80		1.1
-40 ~ -20	e	1
20 ~ 40	e	2
60 ~ 80	e	2.6
-40 ~ -20	g	2.3
20 ~ 40	g	3.6
60 ~ 80	g	4.4

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		2
20 ~ 40		2.1
60 ~ 80		2.2
-40 ~ -20	e	3.2
20 ~ 40	e	3.5
60 ~ 80	e	3.7
-40 ~ -20	g	4.6
20 ~ 40	g	5.1
60 ~ 80	g	5.5