F4 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.616591 n_e = 1.620581	V_d = 36.62 V_e = 36.36	n_F - n_C = 0.016833 n_F' - n_C' = 0.017063	Coloring: 0.35 - 0.33 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.33905825 C2 = 0.205224318 C3 = 0.897859758 C4 = 0.00992220114 C5 = 0.0470000918 C6 = 107.93675

Refraction index
n _2.3254	1.581514
n _1.9701	1.586423
n _1.5296	1.591948
n _1.06	1.598664
n _t	1.599539
n _s	1.603420
n _r	1.608912
n _C	1.611645
n _C'	1.612421
n _0.6328	1.613150
n _D	1.616444
n _d	1.616591
n _e	1.620581
n _F	1.628479
n _F'	1.629485
n _g	1.638284
n _h	1.646788
n _i	1.662157
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7191
P_C,A'	0.3211
P_d,C	0.2938
P_e,C	0.5308
P_g,d	1.2886
P_g,F	0.5824
P_h,g	0.5051
P_i,g	1.4181
P_C',t	0.7652
P_e,C'	0.4847
P_F',e	0.5289
P_i,F'	1.9409

transmittance: 10 mm
τ_2.3254	0.85
τ_1.9701	0.94
τ_1.5296	0.992
τ_1.06	0.994
τ_0.7	0.994
τ_0.66	0.994
τ_0.62	0.994
τ_0.58	0.994
τ_0.54607	0.994
τ_0.5	0.994
τ_0.46	0.994
τ_0.4358	0.993
τ_0.42	0.992
τ_0.4047	0.99
τ_0.4	0.989
τ_0.39	0.984
τ_0.38	0.98
τ_0.37	0.967
τ_0.365	0.95
τ_0.35	0.91
τ_0.3341	0.66

transmittance: 25 mm
τ_2.3254	0.66
τ_1.9701	0.85
τ_1.5296	0.98
τ_1.06	0.985
τ_0.7	0.986
τ_0.66	0.986
τ_0.62	0.986
τ_0.58	0.986
τ_0.54607	0.986
τ_0.5	0.986
τ_0.46	0.984
τ_0.4358	0.982
τ_0.42	0.979
τ_0.4047	0.976
τ_0.4	0.973
τ_0.39	0.96
τ_0.38	0.95
τ_0.37	0.92
τ_0.365	0.88
τ_0.35	0.79
τ_0.3341	0.35

Density: 3.58 g/cm³
Poisson coef.: 0.222
Young module: 560 Pa*10⁸
Knoop hardness: 420
Optical stress coef.: 2.84 1/Pa*10¹²

Climatic resistance: 1
Staining: 0
Resistance to acids: 1
Resistance to alkalis: 2.3
Phosphate resistance: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	83
20 ~ 300	91

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0.2
20 ~ 40		1.5
60 ~ 80		2.1
-40 ~ -20	e	1.4
20 ~ 40	e	2.9
60 ~ 80	e	3.6
-40 ~ -20	g	3.1
20 ~ 40	g	4.7
60 ~ 80	g	5.5

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		2.3
20 ~ 40		2.9
60 ~ 80		3.2
-40 ~ -20	e	3.6
20 ~ 40	e	4.3
60 ~ 80	e	4.7
-40 ~ -20	g	5.3
20 ~ 40	g	6.1
60 ~ 80	g	6.6