N-SF15 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.698920 n_e = 1.704382	V_d = 30.20 V_e = 29.96	n_F - n_C = 0.023142 n_F' - n_C' = 0.023510	Coloring: 0.42 - 0.37 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.57055634 C2 = 0.218987094 C3 = 1.50824017 C4 = 0.0116507014 C5 = 0.0597856897 C6 = 132.709339

Refraction index
n _2.3254	1.652669
n _1.9701	1.658993
n _1.5296	1.666156
n _1.06	1.674941
n _t	1.676093
n _s	1.681221
n _r	1.688543
n _C	1.692216
n _C'	1.693263
n _0.6328	1.694248
n _D	1.698719
n _d	1.698920
n _e	1.704382
n _F	1.715358
n _F'	1.716773
n _g	1.729331
n _h	1.741815
n _i	1.765438
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6967
P_C,A'	0.3131
P_d,C	0.2896
P_e,C	0.5256
P_g,d	1.3140
P_g,F	0.6037
P_h,g	0.5394
P_i,g	1.5601
P_C',t	0.7419
P_e,C'	0.4804
P_F',e	0.5354
P_i,F'	2.1028

transmittance: 10 mm
τ_2.5	0.76
τ_2.3254	0.84
τ_1.9701	0.954
τ_1.5296	0.99
τ_1.06	0.998
τ_0.7	0.995
τ_0.66	0.993
τ_0.62	0.994
τ_0.58	0.994
τ_0.54607	0.994
τ_0.5	0.988
τ_0.46	0.977
τ_0.4358	0.964
τ_0.42	0.94
τ_0.4047	0.89
τ_0.4	0.86
τ_0.39	0.75
τ_0.38	0.53
τ_0.37	0.16

transmittance: 25 mm
τ_2.5	0.51
τ_2.3254	0.64
τ_1.9701	0.89
τ_1.5296	0.976
τ_1.06	0.996
τ_0.7	0.988
τ_0.66	0.983
τ_0.62	0.984
τ_0.58	0.986
τ_0.54607	0.985
τ_0.5	0.97
τ_0.46	0.94
τ_0.4358	0.91
τ_0.42	0.86
τ_0.4047	0.74
τ_0.4	0.68
τ_0.39	0.48
τ_0.38	0.2
τ_0.37	0.01

Density: 2.92 g/cm³
Poisson coef.: 0.243
Young module: 900 Pa*10⁸
Knoop hardness: 610
Optical stress coef.: 3.04 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	93

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-0.7
20 ~ 40		0.2
60 ~ 80		0.6
-40 ~ -20	e	0.8
20 ~ 40	e	2
60 ~ 80	e	2.6
-40 ~ -20	g	2.7
20 ~ 40	g	4.3
60 ~ 80	g	5.2

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		1.6
20 ~ 40		1.6
60 ~ 80		1.7
-40 ~ -20	e	3.1
20 ~ 40	e	3.4
60 ~ 80	e	3.7
-40 ~ -20	g	5
20 ~ 40	g	5.8
60 ~ 80	g	6.4